Patent Description:
In general, a purpose built vehicle (PBV) means a future type vehicle in which a user can freely use the indoor space of the PBV according to his or her purpose so that the user can be provided with a required customized service while the user moves to a destination with the development of the autonomous driving technology.

Such a PBV has a structure in which a top hat, that is, an upper vehicle body designed according to a user's purpose, is coupled to a chassis frame having a skateboard form in which a battery module is widely disposed on the lower side of the PBV. Accordingly, it is necessary to develop a new fastening structure through which the top hat or the battery module can be easily replaced from the chassis frame of the PBV and the automation of an assembly can be implemented.

The background technology of the present disclosure was disclosed in <CIT>). <CIT> relates to an adjustable chassis of the electric cart. Specifically, this document discloses a fastening apparatus according to the preamble of independent claim <NUM>.

Various embodiments are directed to providing a fastening apparatus for a vehicle, wherein a top hat or a battery module can be easily mounted on or separated from the chassis frame of a purpose built vehicle (PBV).

According to the invention, a fastening apparatus for a vehicle includes a first fastener fixed to a first structure, a second fastener coupled to a case fixed to a second structure and configured to have the first fastener inserted therein, a fixing unit movably installed in the second fastener and configured to move in a direction that intersects a direction in which the first fastener is inserted, and to selectively limit relative movements of the first fastener and the second fastener, and an elevation unit installed in the case in a way to move up and down, and configured to be moved up and down by an external force that is applied from a work tool and adjust the direction in which the fixing unit moves. According to the invention, the fastening apparatus comprises:.

Furthermore, the first fastener may include a first body inserted into the second fastener and a trapping part concavely depressed from the outside of the first body.

Furthermore, the first fastener may further include an entry guider extended from the first body and configured to provide guidance to the first body so that the first body enters the second fastener.

Furthermore, the entry guider may be formed so that the width of the entry guider is reduced toward an end thereof.

Furthermore, the second fastener may include a flange coupled to an inner side of the case, a second body extended from the flange in the direction in which the first fastener is inserted and configured to have the first body inserted therein, and an accommodation part formed to penetrate the second body and configured to support the fixing unit in a way to be movable in a radial direction of the second body.

Furthermore, the accommodation part may be formed so that the width of the accommodation part is reduced toward the inside of the second body.

Furthermore, the accommodation part may be provided in a plural number. The plurality of accommodation parts may be disposed to be spaced apart from each other along a circumference of the second body.

Furthermore, as the first body may be fully inserted into the second body, the accommodation part is connected to the trapping part.

Furthermore, the elevation unit includes an elevation member disposed to surround the second fastener and installed in a way to be slidable in a length direction of the second fastener, and a guide member provided between the elevation member and the second fastener and configured to provide guidance to a movement of the fixing unit while operating in conjunction with an elevation movement of the elevation member.

Furthermore, the guide member may include a first guide member concavely depressed from an inner side of the elevation member and configured to dispose the fixing unit at a first location, a second guide member configured to protrude from the inner side of the elevation member and to dispose the fixing unit at a second location, and a third guide member provided between the first guide member and the second guide member and configured to provide guidance to a movement of the fixing unit from any one of the first location and the second location to the other of the first location and the second location.

Furthermore, the fastening apparatus may further include a restoration unit configured to restore the elevation unit to an initial location as the external force applied from the work tool to the elevation unit is released.

According to a non-claimed example, a fastening apparatus for a vehicle may include a first fastener fixed to a first structure, a case fixed to a second structure, disposed to face the first fastener, and configured to have the first fastener inserted therein, an elevation unit installed in the case in a way to move up and down, a second fastener rotatably coupled to the elevation unit, fastened to or separated from the first fastener depending on a rotation direction thereof, and moved up and down along with the elevation unit, and a restoration unit configured to restore the elevation unit to its initial location as the second fastener is separated from the first fastener.

Furthermore, the elevation unit of the non-claimed example may include an elevation member installed within the case and configured to have the second fastener inserted therein, an elevation guide member extended from an outer circumference surface of the elevation member and slidably coupled to the case, and a support member extended from an inner circumference surface of the elevation member and configured to rotatably support the second fastener and to have a free end formed to be round.

Furthermore, the second fastener of the non-claimed example may include a second fastening member disposed within the elevation member and configured to have a screw thread provided on an inner circumference surface thereof, a hook extended from an outer circumference surface of the second fastening member and provided over the support member, a flange extended from the outer circumference surface of the second fastening member, spaced apart from the hook, provided under the hook, and configured to have the support member seated therein, and an insertion groove provided between the hook and the flange and configured to have the support member inserted therein and to have an inner side coming into contact with the free end of the support member formed to be round.

Furthermore, the restoration unit of the non-claimed example may include an elastic member installed between the case and the elevation unit and stretchably provided in a length direction thereof.

The fastening apparatus for a vehicle according to the present disclosure can prevent the waste of a machine and manpower for an additional feeding work and a loss of parts upon assembly because parts necessary for the fastening of the first structure and the second structure can be implemented as one assembly.

Furthermore, the fastening apparatus for a vehicle according to the present disclosure can be more rapidly assembled and is advantageous in terms of the automation of an assembly because the state in which the first fastener and the second fastener have been coupled can be adjusted by only an elevation movement of the elevation unit.

Furthermore, the fastening apparatus for a vehicle according to the present disclosure can improve efficiency and consistency of an assembly because the fastening and separation of the first fastener and the second fastener can be repeatedly performed by the restoration unit.

Advantages and features of the present disclosure and methods of achieving the advantages and features will be clear with reference to embodiments described in detail below together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed herein but will be implemented in various forms. The embodiments of the present disclosure are provided so that the present disclosure is completely disclosed, and a person with ordinary skill in the art can fully understand the scope of the present disclosure. The present disclosure will be defined only by the scope of the appended claims. Meanwhile, the terms used in the present specification are for explaining the embodiments, not for limiting the present disclosure.

<FIG> is an installation state diagram schematically illustrating the state in which a fastening apparatus for a vehicle according to the first embodiment of the present disclosure has been installed. <FIG> is a perspective view schematically illustrating a construction of the fastening apparatus for a vehicle according to the first embodiment of the present disclosure. <FIG> is a cross-sectional view schematically illustrating a construction of the fastening apparatus for a vehicle according to the first embodiment of the present disclosure. <FIG> is an exploded perspective view schematically illustrating a construction of the fastening apparatus for a vehicle according to the first embodiment of the present disclosure.

Referring to <FIG>, a fastening apparatus <NUM> for a vehicle according to the first embodiment of the present disclosure includes a first fastener <NUM>, a case <NUM>, a second fastener <NUM>, a fixing unit <NUM>, an elevation unit <NUM>, a restoration unit <NUM>, and a detachment prevention unit <NUM>.

A first structure <NUM> and a second structure <NUM> that are described hereinafter may be exemplified as a top hat corresponding to a vehicle body which can be customized and replaced depending on a user's purpose and a chassis frame that is installed on the lower side of a vehicle and that structurally supports the vehicle, respectively. However, the first structure <NUM> and the second structure <NUM> are not limited to the top hat and the chassis frame, and may be variously changed in design as different structures which may be fastened together and separated from each other in a vehicle, such as a chassis frame and a battery module.

The first fastener <NUM> is fixed to the first structure <NUM> and is fastened to the second fastener <NUM> through the medium of the fixing unit <NUM> that is described later, and mutually fixes the first structure <NUM> and the second structure <NUM>.

<FIG> is a perspective view schematically illustrating a construction of the first fastener according to the first embodiment of the present disclosure.

Referring to <FIG>, the first fastener <NUM> according to the present disclosure includes a fixing unit <NUM>, a first body <NUM>, an entry guider <NUM>, and a trapping part <NUM>.

The fixing unit <NUM> forms an external appearance of the top of the first fastener <NUM> according to the present disclosure, and generally supports a second body <NUM> and the entry guider <NUM> that are described later. The fixing unit <NUM> according to the present disclosure is seated and fixed to the inner side of a bracket part <NUM> that is coupled to the first structure <NUM>. The fixing unit <NUM> may be welded or bonded to the inner side of the bracket part <NUM> and integrally coupled to the bracket part <NUM>. A detailed shape of the fixing unit <NUM> may be changed in design in various forms which may be seated and fixed to the inner side of the bracket part <NUM>, in addition to the circular shape illustrated in <FIG>.

The first body <NUM> is extended from the fixing unit <NUM>, and forms an external appearance of a central part of the first fastener <NUM>. The first body <NUM> according the present disclosure may be formed to have a form of a rod that is perpendicularly extended downward from the inner side of the fixing unit <NUM>. The second body <NUM> penetrates the inner side of the bracket part <NUM>, and is extended downward from the bracket part <NUM>.

The entry guider <NUM> is extended from the first body <NUM>, and forms an external appearance of a lower part of the first fastener <NUM>. The entry guider <NUM> is provided to provide guidance to the first body <NUM> so that the first body <NUM> enters the inside of the second fastener <NUM> in a process of the first fastener <NUM> and the second fastener <NUM> being fastened together. The entry guider <NUM> according to the present disclosure is perpendicularly extended downward from the lower end of the first body <NUM>. The entry guider <NUM> is formed so that the width of the entry guider <NUM> is reduced toward an end thereof. Accordingly, the entry guider <NUM> may be formed to have approximately a shape of a cone.

The trapping part <NUM> is provided between the fixing unit <NUM> and the entry guider <NUM>, and is formed to have a form of a groove that is concavely depressed from the outside of the first body <NUM>. The trapping part <NUM> is extended to form a looped curve in the circumferential direction of the first body <NUM>.

The case <NUM> is fixed to the second structure <NUM>, and generally supports the second fastener <NUM> and the elevation unit <NUM> that are described later. The first fastener <NUM> is inserted into the case <NUM> through the top of the case <NUM> so that a fastening operation of the first fastener <NUM> and the second fastener <NUM> is performed within the case <NUM>.

<FIG> are a perspective view is a cross-sectional view schematically illustrating a construction of the case according to the first embodiment of the present disclosure.

Referring to <FIG>, the case <NUM> according to the present disclosure may have an empty inside, and may be formed to have a cylindrical shape the bottom of which is opened. The length direction of the case <NUM> is parallel to the length direction of the first fastener <NUM>. The case <NUM> may be supported against the second structure <NUM> through the medium of an assembly part <NUM> that is extended from the side of the case <NUM>. In this case, the assembly part <NUM> may be integrally coupled to the second structure <NUM> by welding or bonding, or may be detachably coupled to the second structure <NUM> by bolting.

An insertion hole part <NUM> into which the first fastener <NUM> is inserted is formed at the top of the case <NUM>. The insertion hole part <NUM> according to the present disclosure may be formed to have a form of a hole that perpendicularly penetrates the top of the case <NUM> up and down. The insertion hole part <NUM> may be formed to have a diameter greater than the diameter of the first body <NUM> so that an operation of the first fastener <NUM> being inserted into the insertion hole part <NUM> is smoothly performed.

A rail part <NUM> may be formed within the case <NUM>. The rail part <NUM> according to the present disclosure perpendicularly protrudes from the inner circumference surface of the case <NUM> toward an internal space of the case <NUM>. However, the rail part <NUM> is not limited to such a shape, and may be formed in the form of a groove that is concavely depressed from the inner circumference surface of the case <NUM> toward the outer circumference surface of the case <NUM>. The length direction of the rail part <NUM> is extended in parallel to the length direction of the case <NUM>. The rail part <NUM> may be provided in a plural number. In this case, the plurality of rail parts <NUM> may be spaced apart from each other and disposed along an inner circumference surface of the case <NUM>.

The second fastener <NUM> is coupled to the case <NUM> and the first fastener <NUM> is inserted into the second fastener <NUM>. The second fastener <NUM> is fastened to the first fastener <NUM> through the medium of the fixing unit <NUM> that is described later, and mutually fixes the first structure <NUM> and the second structure <NUM>.

<FIG> is a perspective view schematically illustrating a construction of the second fastener according to the first embodiment of the present disclosure.

Referring to <FIG> and <FIG>, the second fastener <NUM> according to the present disclosure includes a flange <NUM>, a second body <NUM>, and an accommodation part <NUM>.

The flange <NUM> forms an external appearance of the top of the second fastener <NUM> according to the present disclosure, and is coupled to the inner side of the case <NUM>. The flange <NUM> according to the present disclosure may be formed to have a hollow disk shape in the central part of which a through hole is formed. The top of the flange <NUM> is seated and fixed to the lower side of the top of the case <NUM>. The flange <NUM> may be welded or bonded to the lower side of the top of the case <NUM>, and may be integrally coupled to the case <NUM>. A detailed shape of the flange <NUM> may be changed in design in various forms which may be fixed to the case <NUM>, in addition to the circular shape illustrated in <FIG>.

An assembly guide member <NUM> is provided at the outer circumference surface of the flange <NUM>. The assembly guide member <NUM> according the present disclosure may be formed to have a form of a groove which is concavely depressed from the outer circumference surface of the flange <NUM> toward the inside of the flange <NUM> in a radial direction thereof. The rail part <NUM> that is formed in the case <NUM> is seated in the assembly guide member <NUM>. Accordingly, the assembly guide member <NUM> provides guidance to an operation of the second fastener <NUM> being inserted into the case <NUM> and prevents the second fastener <NUM> from being arbitrarily rotated within the case <NUM>. The assembly guide member <NUM> is provided in a plural number. The plurality of assembly guide members <NUM> is disposed in the circumferential direction of the flange <NUM> in a way to be spaced apart from each other at designated intervals. The number of assembly guide members <NUM> and an interval between the assembly guide members <NUM> correspond to the number of rail parts <NUM> and an interval between the rail parts <NUM>, respectively.

The second body <NUM> forms n external appearance of the lower part of the flange <NUM>, and provides a space in which the accommodation part <NUM> described later may be installed. The second body <NUM> is perpendicularly extended downward from the flange <NUM> according to the present disclosure in the direction in which the first fastener <NUM> is inserted. The second body <NUM> is formed to have a hollow cylindrical shape both sides of which are opened, and is connected to the through hole that is formed in the central part of the flange <NUM>. The first body <NUM> is inserted into the second body <NUM> after sequentially passing through the case <NUM> and the flange <NUM> in a process of the first fastener <NUM> and the second fastener <NUM> being fastened.

The accommodation part <NUM> is formed to penetrate the second body <NUM>, and supports the fixing unit <NUM> that is described later in a way to be movable in the radial direction of the second body <NUM>. The accommodation part <NUM> according to the present disclosure may be formed to have a form of a hole that transversely penetrates the outer circumference surface of the second body <NUM>. The accommodation part <NUM> is provided in a plural number. The plurality of accommodation parts <NUM> is disposed along the circumference of the second body <NUM> in a way to be spaced apart from each other at designated intervals.

The accommodation part <NUM> may be formed so that the width of the accommodation part <NUM> is reduced toward the inside of the second body <NUM>. That is, the accommodation part <NUM> is slantly extended at a designated angle from the outer circumference surface of the second body <NUM> toward the inner circumference surface of the second body <NUM>. Accordingly, the accommodation part <NUM> can induce the fixing unit <NUM> to move from a second location to a first location as will be described later by its own weight even without a separate external force. The diameter of an end of the accommodation part <NUM> on one side thereof, which penetrates the inner circumference surface of the accommodation part <NUM>, is formed to be smaller than the diameter of the fixing unit <NUM>. Furthermore, the diameter of an end of the accommodation part <NUM> on the other side thereof, which penetrates the outer circumference surface of the accommodation part <NUM>, is formed to be greater than the diameter of the fixing unit <NUM>.

The accommodation part <NUM> is connected to the trapping part <NUM> as the first body <NUM> is fully inserted into the second body <NUM>. Such a case in which the first body <NUM> has been fully inserted into the second body <NUM> may be exemplified as the state in which the bottom of the bracket part <NUM> has come into contact with the top of the case <NUM>.

The fixing unit <NUM> is movably installed in the second fastener <NUM>. The fixing unit <NUM> is moved in a direction that intersects the direction in which the first fastener <NUM> is inserted, and selectively limits relative movements of the first fastener <NUM> and the second fastener <NUM>. The fixing unit <NUM> according to the present disclosure is formed to have approximately a form of a sphere, and is installed within the accommodation part <NUM>. The fixing unit <NUM> is provided in a plural number. The plurality of fixing units <NUM> is individually installed within the plurality of accommodation parts <NUM>. The fixing unit <NUM> is moved to the first location or the second location within the accommodation part <NUM> by an elevation movement of the elevation unit <NUM> that is described later, and changes the state in which the first fastener <NUM> and the second fastener <NUM> have been fastened.

<FIG> is a diagram illustrating the state in which the fixing unit according to the first embodiment of the present disclosure has been disposed at the first location. <FIG> is a diagram illustrating the state in which the fixing unit according to the first embodiment of the present disclosure has been disposed at the second location.

Referring to <FIG>, the state in which the fixing unit <NUM> has been disposed at the first location may be exemplified as the state in which as the fixing unit <NUM> is moved to the outside of the second body <NUM> in the radial direction thereof, the circumferential surface of the fixing unit <NUM> has been separated from the trapping part <NUM> and has not protruded into the internal space of the second body <NUM>. In this case, the first body <NUM> may be relatively moved up and down with respect to the second body <NUM> within the second body <NUM> without particular interference.

Referring to <FIG>, the state in which the fixing unit <NUM> has been disposed at the second location may be exemplified as the state in which as the fixing unit <NUM> is moved toward the inside of the second body <NUM> in the radial direction thereof, the circumferential surface of the fixing unit <NUM> has protruded into the internal space of the second body <NUM> and has been inserted into the trapping part <NUM>. In this case, a relative movement of the first body <NUM> with respect to the second body <NUM> is confined by a trapping force of the trapping part <NUM> and the fixing unit <NUM>.

The elevation unit <NUM> is installed in the case <NUM> in a way to be movable up and down, and is moved up and down by an external force that is applied by a work tool <NUM> (refer to <FIG>). The elevation unit <NUM> adjusts the direction in which the fixing unit <NUM> is moved.

<FIG> are a perspective view schematically illustrating a construction of the elevation unit according to the first embodiment of the present disclosure.

The elevation unit <NUM> according to the present disclosure includes an elevation member <NUM>, an elevation guide member <NUM>, and a guide member <NUM>.

The elevation member <NUM> is disposed to surround the second fastener <NUM>, and is installed in a way to be slidable in a length direction of the second fastener <NUM>.

The elevation member <NUM> according to the present disclosure may include a first elevation member <NUM> and a second elevation member <NUM>.

The first elevation member <NUM> may be formed to have a hollow cylindrical shape and installed between the case <NUM> and the second body <NUM>. The outer circumference surface of the first elevation member <NUM> may come into contact with the inner circumference surface of the case <NUM> in a way to be slidable. The inner circumference surface of the first elevation member <NUM> may be disposed to face the outer circumference surface of the second body <NUM> in a way to be spaced apart from the outer circumference surface of the second body <NUM> at a designated interval.

The second elevation member <NUM> may be formed to have a hollow cylindrical shape, and be perpendicularly extended downward from the lower end of the first elevation member <NUM>. The outer circumference surface of the second elevation member <NUM> may come into contact with the inner circumference surface of the case <NUM> in a way to be slidable. The diameter of the inner circumference surface of the second elevation member <NUM> may be formed to be smaller than the diameter of the inner circumference surface of the first elevation member <NUM>. Accordingly, the second elevation member <NUM> may provide a space in which the bottom of a restoration unit <NUM> that is described later may be seated at the top of the second elevation member <NUM>. The inner circumference surface of the second elevation member <NUM> may be disposed to face the outer circumference surface of the second body <NUM> in a way to be spaced apart from the outer circumference surface of the second body <NUM> at a designated interval.

The elevation guide member <NUM> may be formed to have a form of a groove that is concavely depressed from the outer circumference surface of the elevation member <NUM> toward the inside of the elevation member <NUM> in the radial direction thereof. The length direction of the elevation guide member <NUM> is extended in parallel to the length direction of the elevation member <NUM>. The rail part <NUM> that is formed in the case <NUM> is seated in the elevation guide member <NUM>. Accordingly, the elevation guide member <NUM> may provide guidance to an elevation operation of the elevation member <NUM> with respect to the case <NUM>, and prevent the elevation member <NUM> from being arbitrarily rotated within the case <NUM>. The elevation guide member <NUM> may be provided in a plural number. The plurality of elevation guide members <NUM> may be disposed in the circumferential direction of the elevation member <NUM> in a way to be spaced apart from each other at designated intervals. The number of elevation guide members <NUM> and an interval between the elevation guide members <NUM> may correspond to the number of rail parts <NUM> and an interval between the rail parts <NUM>, respectively.

The guide member <NUM> is provided between the elevation member <NUM> and the second fastener <NUM>. The guide member <NUM> provides guidance to a movement of the fixing unit <NUM> while operating in conjunction with an elevation movement of the elevation member <NUM>. That is, the guide member <NUM> changes a location of the fixing unit <NUM> from the first location to the second location or from the second location to the first location in response to an elevation movement direction of the elevation member <NUM>.

<FIG> is an enlarged view schematically illustrating a construction of the guide member according to the first embodiment of the present disclosure.

The guide member <NUM> according to the present disclosure includes a first guide member <NUM>, a second guide member <NUM>, and a third guide member <NUM>.

The first guide member <NUM> is concavely depressed from the inner side of the elevation member <NUM>, and disposes the fixing unit <NUM> at the first location. The first guide member <NUM> according to the present disclosure is concavely depressed from the inner circumference surface of the lower end of the second elevation member <NUM> to the outside of the second elevation member <NUM> in the radial direction thereof. The first guide member <NUM> is spaced apart from the outer circumference surface of the second body <NUM> at a designated interval. The first guide member <NUM> is extended in the circumferential direction of the second elevation member <NUM> in a way to form a looped curve. If the elevation member <NUM> has been upward fully moved, the first guide member <NUM> is disposed to face the accommodation part <NUM> and provides guidance to the fixing unit <NUM> so that the fixing unit <NUM> is disposed at the first location.

The second guide member <NUM> protrudes from the inner side of the elevation member <NUM> and disposes the fixing unit <NUM> at the second location. The second guide member <NUM> according to the present disclosure transversely protrudes from the inner circumference surface of the top of the second elevation member <NUM> toward the inside of the second elevation member <NUM> in the radial direction thereof. The second guide member <NUM> may come into contact with the outer circumference surface of the second body <NUM> in a way to be slidable. The second guide member <NUM> is extended in the circumferential direction of the second elevation member <NUM> in a way to form a looped curve. If the elevation member <NUM> has been fully downward moved, the second guide member <NUM> is disposed to face the accommodation part <NUM> and provides guidance to the fixing unit <NUM> so that the fixing unit <NUM> is disposed at the second location.

The third guide member <NUM> is provided between the first guide member <NUM> and the second guide member <NUM>, and provides guidance to the fixing unit <NUM> so that the fixing unit <NUM> is moved from any one of the first location and the second location to the other of the first location and the second location. The third guide member <NUM> according to the present disclosure may be formed to have a form of a curved surface both ends of which are connected to the top of the first guide member <NUM> and the bottom of the second guide member <NUM>, respectively. The third guide member <NUM> is rounded with designated curvature. In this case, the curvature of the third guide member <NUM> may be formed to correspond to curvature of the fixing unit <NUM>. Accordingly, the third guide member <NUM> can prevent a trapping phenomenon which may occur in a process in which the location of the fixing unit <NUM> is changed due to a difference between the diameters of the first guide member <NUM> and the second guide member <NUM>.

The restoration unit <NUM> restores the elevation unit <NUM> to an initial location thereof as an external force that is applied from the work tool <NUM> to the elevation unit <NUM> is released. In this case, the initial location of the elevation unit <NUM> may mean the state in which the elevation unit <NUM> has descended to the maximum within the case <NUM> and has come into contact with a detachment prevention unit <NUM> that is described later. Accordingly, the restoration unit <NUM> can secure consistent assembly performance when the first fastener <NUM> and the second fastener <NUM> are repeatedly fastened.

<FIG> is a perspective view schematically illustrating a construction of the restoration unit according to the first embodiment of the present disclosure.

Referring to <FIG> and <FIG>, the restoration unit <NUM> according to the present disclosure is installed between the case <NUM> and the elevation unit <NUM>. The restoration unit <NUM> is formed to have a form of a coil spring that is provided in a way to be stretchable in a length direction thereof, and elastically supports the elevation unit <NUM> with respect to the case <NUM>. The length direction of the restoration unit <NUM> is parallel to the length direction of the case <NUM>. If the elevation unit <NUM> is disposed at its initial location, the restoration unit <NUM> may be installed in its neutral state so that an elastic force is not generated in the length direction thereof.

Both ends of the restoration unit <NUM> come into surface contact with the case <NUM> and the elevation unit <NUM>, respectively, and are supported by the case <NUM> and the elevation unit <NUM>. More specifically, each of the both ends of the restoration unit <NUM> is formed to have a semicircle-shaped cross-section form, and the both ends of the restoration unit <NUM> come into surface contact with the lower side of the top of the case <NUM> and the top of the second elevation member <NUM>. Accordingly, the restoration unit <NUM> can stably maintain a standing state without a special movement between the case <NUM> and the elevation unit <NUM> even without separate support means.

The detachment prevention unit <NUM> is coupled to the second fastener <NUM>, and prevents the elevation unit <NUM> from being detached from the case <NUM>. The detachment prevention unit <NUM> according to the present disclosure may include a coupling part <NUM> that is formed in a hollow cylindrical shape and that has an outer circumference surface screwed onto the inner circumference surface of the bottom of the second body <NUM> and a detachment prevention member <NUM> that is extended from the bottom of the coupling part <NUM> in the radial direction of the coupling part <NUM> and that is disposed to face the bottom of the elevation member <NUM>. If the elevation member <NUM> has been disposed at its initial location, the detachment prevention member <NUM> comes into contact with the bottom of the elevation member <NUM> and supports the elevation member <NUM>. Accordingly, the detachment prevention unit <NUM> limits the elevation unit <NUM> so that the elevation unit <NUM> is not arbitrarily separated from the case <NUM> due to the elastic force of the restoration unit <NUM>. Accordingly, a loss of a part can be prevented, and a repair and replacement can be easily performed.

Hereinafter, an operation of the fastening apparatus <NUM> for a vehicle according to the first embodiment of the present disclosure is described in detail.

<FIG> are diagrams schematically illustrating an assembly process of the fastening apparatus for a vehicle according to the first embodiment of the present disclosure.

Referring to <FIG>, as the first structure <NUM> is seated on the top of the second structure <NUM>, the first fastener <NUM> fixed to the first structure <NUM> is inserted into the second fastener <NUM> through the insertion hole part <NUM>.

At this time, the elevation member <NUM> is disposed at its initial location by the elastic force of the restoration unit <NUM>. The fixing unit <NUM> is disposed at the second location by the second guide member <NUM>, and thus maintains the state in which the circumferential surface of the fixing unit <NUM> has protruded into the internal space of the second body <NUM>.

Thereafter, the work tool <NUM> comes into contact with the bottom of the second elevation member <NUM> and upward pushes up the elevation member <NUM>.

As the elevation member <NUM> is upward moved by a designated distance or more, the contact of the fixing unit <NUM> with the second guide member <NUM> is released, and the fixing unit <NUM> is disposed to face the first guide member <NUM>.

The fixing unit <NUM> whose contact with the second guide member <NUM> has been released moves to the outside in the radial direction of the second body <NUM> along the inner side of the accommodation part <NUM> by its own weight, and is then disposed at the first location.

As the fixing unit <NUM> is disposed at the first location, the fixing unit <NUM> opens the path along which the first body <NUM> is inserted into the second body <NUM>. At this time, the fixing unit <NUM> can be prevented from be detached from the accommodation part <NUM> because the circumferential surface of the fixing unit <NUM> comes into contact with the inner side of the first guide member <NUM>.

Thereafter, the first body <NUM> continues to be inserted into a point at which the trapping part <NUM> is connected to the accommodation part <NUM>.

As the trapping part <NUM> is connected to the accommodation part <NUM>, the work tool <NUM> is separated from the second elevation member <NUM> and thus releases the external force that is applied to the elevation member <NUM>.

The elevation member <NUM> is downward moved by its own weight and the elastic restoring force of the restoration unit <NUM>, and returns to its initial location. At this time, the elevation member <NUM> can be prevented from being detached from the case <NUM> because the bottom of the second elevation member <NUM> comes into contact with the top of the detachment prevention member <NUM> at the initial location of the elevation member <NUM>.

As the elevation member <NUM> is downward moved, the fixing unit <NUM> that has come into contact with the inner side of the first guide member <NUM> is inward moved in the radial direction of the second body <NUM> by the third guide member <NUM>. In this case, since the third guide member <NUM> is rounded with designated curvature, the fixing unit <NUM> may be inward smoothly moved in the radial direction of the second body <NUM> without particular interference.

Thereafter, the fixing unit <NUM> is disposed at the second location by the second guide member <NUM>, and a part of the circumferential surface of the fixing unit <NUM> protrudes into the internal space of the second body <NUM>.

The circumferential surface of the fixing unit <NUM> that has protruded into the internal space of the second body <NUM> is inserted into the trapping part <NUM>, and limits relative movements of the first fastener <NUM> and the second fastener <NUM>.

An operation of the first fastener <NUM> and the second fastener <NUM> being separated from each other may be performed in the reverse order of the operation of the first fastener <NUM> and the second fastener <NUM> being assembled.

Hereinafter, a fastening apparatus <NUM>' for a vehicle according to a second embodiment (not part of the invention) of the present disclosure is described.

<FIG> is a perspective view illustrating the state in which a fastening apparatus for a vehicle according to a second embodiment of the present disclosure has been installed. <FIG> is a perspective view illustrating the fastening apparatus for a vehicle according to the second embodiment of the present disclosure. <FIG> is a cross-sectional view illustrating the fastening apparatus for a vehicle according to the second embodiment of the present disclosure. <FIG> is an exploded perspective view illustrating the fastening apparatus for a vehicle according to the second embodiment of the present disclosure.

Referring to <FIG>, the fastening apparatus <NUM>' for a vehicle according to the present embodiment is constituted with components that include a first fastener <NUM>, a case <NUM>, an elevation unit <NUM>, a second fastener <NUM>, and a restoration unit <NUM>, which are described in detail as follows.

The first fastener <NUM> is fixed to the first structure <NUM> and is fastened to the second fastener <NUM>, and it mutually fixes the second structure <NUM> and the first structure <NUM>.

<FIG> is a perspective view illustrating the first fastener in the fastening apparatus for a vehicle according to the second embodiment of the present disclosure.

Referring to <FIG>, the first fastener <NUM> may include a fixing part <NUM>, an extension part <NUM>, and an entry guider <NUM>.

The fixing part <NUM> forms an external appearance of the top of the first fastener <NUM>, and generally supports the extension part <NUM> and the entry guider <NUM>. The fixing part <NUM> is seated and fixed to the inner side of a bracket part <NUM> that is coupled to the first structure <NUM>. The fixing part <NUM> may be welded or bonded to the inner side of the bracket part <NUM> and integrally coupled to the bracket part <NUM>. A detailed shape of the fixing part <NUM> may be changed in design in various forms which may be seated and fixed to the inner side of the bracket part <NUM>, in addition to the circular shape illustrated in <FIG> and <FIG>.

The extension part <NUM> is extended from the fixing part <NUM>, and forms an external appearance of a central part of the first fastener <NUM>. The extension part <NUM> may be formed to have a form of a rod that is perpendicularly extended downward from the inner side of the fixing part <NUM>. The extension part <NUM> penetrates the inner side of the bracket part <NUM>, and is extended downward from the bracket part <NUM>. The extension part <NUM> has a screw thread formed on an outer circumference surface thereof in a length direction thereof so that the extension part <NUM> can be spirally coupled to the second fastener <NUM>.

The entry guider <NUM> is extended from the extension part <NUM>, and forms an external appearance of a lower part of the first fastener <NUM>. The entry guider <NUM> is provided to provide guidance to the extension part <NUM> so that the extension part <NUM> enters the inside of the second fastener <NUM> in a process of the first fastener <NUM> and the second fastener <NUM> being fastened together. The entry guider <NUM> is perpendicularly extended downward from the lower end of extension part <NUM>. The entry guider <NUM> is formed so that the width of the entry guider <NUM> is reduced toward an end thereof. Accordingly, the entry guider <NUM> may be formed to have approximately a shape of a cone.

The case <NUM> is fixed to the second structure <NUM>, and is disposed to face the first fastener <NUM>. The case <NUM> generally supports the elevation unit <NUM> and the restoration unit <NUM>.

The case <NUM> is provided in a way that the first fastener <NUM> is inserted into the case <NUM> through the top of the case <NUM> so that a fastening operation of the first fastener <NUM> and the second fastener <NUM> is performed within the case <NUM> and that a work tool <NUM>, such as a socket wrench, can enter the bottom of the case <NUM>.

<FIG> and <FIG> are exploded perspective views illustrating the case in the fastening apparatus for a vehicle according to the second embodiment of the present disclosure.

Referring to <FIG>, the case <NUM> may have an empty inside, and may be formed to have a cylindrical shape the bottom of which is opened. The length direction of the case <NUM> is parallel to the length direction of the first fastener <NUM>. The case <NUM> may be supported against the second structure <NUM> through the medium of an assembly part <NUM> that is extended from the side of the case <NUM>. In this case, the assembly part <NUM> may be integrally coupled to the second structure <NUM> by welding, bonding, etc. and may be detachably coupled to the second structure <NUM> by bolting, etc..

The top of the case <NUM> is disposed to face an end of the first fastener <NUM> fixed to the first structure <NUM>, that is, the bottom of the entry guider <NUM>. An insertion hole part <NUM> into which the first fastener <NUM> is inserted is formed at the top of the case <NUM>. The insertion hole part <NUM> may be formed to have a form of a hole that perpendicularly penetrates the top of the case <NUM> up and down. The insertion hole part <NUM> may be formed to have a diameter greater than the diameter of the extension part <NUM> so that an operation of the first fastener <NUM> being inserted into the insertion hole part <NUM> is smoothly performed.

A rail part <NUM> may be formed within the case <NUM>. The rail part <NUM> perpendicularly protrudes from the inner circumference surface of the case <NUM> toward an internal space of the case <NUM>. However, the rail part <NUM> is not limited to such a shape, and may be formed in the form of a groove that is concavely depressed from the inner circumference surface of the case <NUM> toward the outer circumference surface of the case <NUM> depending on a shape of an elevation guide member <NUM> that is provided in the elevation unit <NUM>. The length direction of the rail part <NUM> extends in a direction parallel to the length direction of the case <NUM>. The rail part <NUM> may be provided in a plural number. In this case, the plurality of rail parts <NUM> may be spaced apart from each other and disposed along the inner circumference surface of the case <NUM>.

A stopper <NUM> for preventing the elevation unit <NUM> and the restoration unit <NUM> from deviating from the inside of the case <NUM> may be provided at the bottom of the case <NUM>. The stopper <NUM> may be formed to have a form of a plate that is transversely extended from an edge of the bottom of the case <NUM> toward a central axis of the case <NUM>. The stopper <NUM> may be integrally formed with the case <NUM>, and may be fabricated separately from the case <NUM> and connected to the case <NUM> in a way to be separable from the case <NUM> as illustrated in <FIG> and <FIG>. A tool hole part <NUM> that is formed to perpendicularly penetrate the stopper <NUM> up and down so that the work tool <NUM>, such as a motor drill or a socket wrench, can enter the tool hole part <NUM> is formed at the central part of the stopper <NUM>.

The elevation unit <NUM> is installed within the case <NUM> in a way to move up and down. The elevation unit <NUM> functions to align the second fastener <NUM> to its regular location within the case <NUM> and also to provide guidance to a movement of the second fastener <NUM> in a process of the first fastener <NUM> and the second fastener <NUM> being fastened together.

<FIG> is a perspective view illustrating the elevation unit in the fastening apparatus for a vehicle according to the second embodiment of the present disclosure.

Referring to <FIG>, the elevation unit <NUM> may include an elevation member <NUM>, an elevation guide member <NUM>, and a support member <NUM>.

The elevation member <NUM> forms a schematic external appearance of the elevation unit <NUM>, and is installed within the case <NUM> in a way to move up and down. The elevation member <NUM> is formed to have a hollow cylindrical shape both sides of which have been opened, and is installed within the case <NUM>. An outer circumference surface of the elevation member <NUM> is spaced apart from the inner circumference surface of the case <NUM> at a given interval so that the elevation member <NUM> can smoothly move up and down within the case <NUM> and also provide a space where the elevation guide member <NUM> and the restoration unit <NUM> to be described later may be installed.

The elevation guide member <NUM> is extended from the outer circumference surface of the elevation member <NUM>, and is connected to the rail part <NUM> provided on the inner circumference surface of the case <NUM> in a way to be slidable. The elevation guide member <NUM> may be formed to have a form of a circular plate that is transversely extended in the radial direction of the elevation member <NUM> from the outer circumference surface of the elevation member <NUM> at the bottom thereof. The elevation guide member <NUM> is formed to have a greater diameter than the tool hole part <NUM>. Accordingly, the elevation guide member <NUM> can be prevented from deviating toward the outside of the case <NUM> because the inner side of the elevation guide member <NUM> comes into contact with an upper side of the stopper <NUM>, and the work tool <NUM> can be prevented from directly coming into contact with the restoration unit <NUM>.

The elevation guide member <NUM> is connected to the rail part <NUM> in a way to be slidable through the medium of an elevation guide member <NUM> formed in the outer circumference surface of the elevation guide member <NUM>. The elevation guide member <NUM> may be formed to have a form of a groove that is concavely depressed from the outer circumference surface of the elevation member <NUM> toward the central axis of the elevation member <NUM>. The elevation guide member <NUM> is formed to have a cross section corresponding to a cross section of the rail part <NUM> that protrudes from the inner circumference surface of the case <NUM>. The elevation guide member <NUM> is inserted into the rail part <NUM>. The elevation guide member <NUM> slides in the length direction of the rail part <NUM>, and supports the elevation member <NUM> against the case <NUM> so that the elevation member <NUM> moves up and down. However, the elevation guide member <NUM> is not limited to such a form. If the rail part <NUM> is formed to be depressed concavely from the inner circumference surface of the case <NUM>, the elevation guide member <NUM> may be formed in a form that protrudes from the outer circumference surface of the elevation member <NUM>. The elevation guide member <NUM> may be provided in a plural number. The elevation guide members <NUM> may be spaced apart from each other at a given interval and disposed on the outer circumference surface of the elevation member <NUM>.

The support member <NUM> is extended from the inner circumference surface of the elevation member <NUM>, and rotatably supports the second fastener <NUM>. The support member <NUM> may be formed to have a form of a ring that transversely extends from the inner circumference surface of the elevation member <NUM> at the top thereof toward the inside of the elevation member <NUM> in the radial direction thereof. For the smooth rotation of the second fastener <NUM>, a free end of the support member <NUM> may be rounded to the outside of the support member <NUM> so that the free end has given curvature. When the second fastener <NUM> rises to a maximum height thereof as the first fastener <NUM> and the second fastener <NUM> are fastened together, the support member <NUM> does not come into contact with the upper side of the case <NUM> on the inner side thereof so that rotatory power of the second fastener <NUM> is not transferred to the elevation unit <NUM>.

The second fastener <NUM> is rotatably coupled to the elevation unit <NUM>. The second fastener <NUM> is connected to the work tool <NUM> that enters the case <NUM> through the bottom of the case <NUM>, and is rotated around a central axis thereof clockwise or counterclockwise by rotatory power that is applied by the work tool <NUM>. The second fastener <NUM> is fastened to or separated from the first fastener <NUM> depending on a rotation direction thereof, and is moved up and down within the case <NUM> along with the elevation unit <NUM>. That is, the second fastener <NUM> is coupled to the elevation unit <NUM> so that the second fastener <NUM> can be integrally moved up and down along with the elevation unit <NUM> and also relatively rotated with respect to the elevation unit <NUM>.

<FIG> is a perspective view illustrating the second fastener in the fastening apparatus for a vehicle according to the second embodiment of the present disclosure.

Referring to <FIG>, the second fastener <NUM> may include a second fastening member <NUM>, a hook <NUM>, a flange <NUM>, and an insertion groove <NUM>.

The second fastening member <NUM> is formed to have a hollow pole shape, and is inserted into the elevation member <NUM>. The second fastening member <NUM> is formed to have a smaller diameter than the elevation member <NUM>. An outer circumference surface of the second fastening member <NUM> is spaced apart from the inner circumference surface of the elevation member <NUM> at a given interval. Accordingly, the second fastening member <NUM> can be smoothly rotated within the elevation member <NUM> without particular interference. A screw thread that is screwed onto the outer circumference surface of the extension part <NUM> is provided on an inner circumference surface of the second fastening member <NUM>. The second fastening member <NUM> is formed to have a length in which a bottom thereof can protrude downward from the elevation member <NUM>. Accordingly, the second fastening member <NUM> can improve the accessibility of the work tool <NUM>.

The second fastening member <NUM> may be formed to have a polygon cross section. A cross section of the second fastening member <NUM> may be a hexagon. Accordingly, the second fastening member <NUM> can efficiently receive rotatory power from the work tool <NUM>.

The hook <NUM> is extended from the second fastening member <NUM>, and is provided over the support member <NUM>. The hook <NUM> is formed to be bent approximately in a "¬" shape from the top of the second fastening member <NUM> to the outside of the second fastening member <NUM> in a radial direction thereof. When the second fastening member <NUM> is rotated around a central axis thereof, a lower side of the hook <NUM> is disposed over the support member <NUM> so that the hook <NUM> is relatively rotated with respect to the support member <NUM>. For the smooth rotation of the second fastener <NUM>, a gap G is formed between the support member <NUM> and the hook <NUM>.

The flange <NUM> is extended from the second fastening member <NUM> and is provided under the support member <NUM>. The support member <NUM> is seated in the flange <NUM>. Furthermore, the flange <NUM> prevents an up and down movement of the second fastening member <NUM> with respect to the elevation unit <NUM>. Accordingly, the second fastening member <NUM> can be supported in the state in which the second fastening member <NUM> is moved up and down integrally with the elevation member <NUM> and also relatively rotated with respect to the elevation member <NUM>.

The flange <NUM> is transversely extended from the outer circumference surface of the second fastening member <NUM> to the outside of the second fastening member <NUM> in the radial direction thereof. The flange <NUM> is spaced apart from the hook <NUM> at a given interval in the length direction of the second fastening member <NUM>, and is disposed to face the hook <NUM>. When the support member <NUM> is seated in the flange <NUM>, the flange <NUM> is disposed to face a lower side of the support member <NUM> at the bottom thereof.

The insertion groove <NUM> is provided between the hook <NUM> and the flange <NUM>. The support member <NUM> is inserted into the insertion groove <NUM>. An inner side of the insertion groove <NUM> that comes into contact with the free end of the support member <NUM> may be formed to be round toward the inside of the insertion groove <NUM> so that the inner side has given curvature. A lubricant is applied on the inner side of the insertion groove <NUM>. The gap G is formed between the support member <NUM> and the hook <NUM>.

As the second fastening member <NUM> is rotated by the work tool <NUM>, when the second fastening member <NUM> rises to a maximum height thereof, the hook <NUM> provided over the support member <NUM> comes into contact with the upper side of the case <NUM> on the inside thereof. The support member <NUM> inserted into the insertion groove <NUM> does not come into contact with the upper side of the case <NUM> on the inside thereof by the hook <NUM>.

At this time, although the work tool <NUM> continues to rotate the second fastening member <NUM>, the free end of the support member <NUM> that has been formed to be round toward the outside thereof so that the free end has given curvature comes into contact with the inner side of the insertion groove <NUM> that has been formed to be round toward the inside thereof so that the inner side has given curvature. A lubricant is applied on the inner side of the insertion groove <NUM>. The gap G is formed between the support member <NUM> and the hook <NUM>. Accordingly, the breakage of the support member <NUM> and the elevation member <NUM> can be prevented because rotatory power of the second fastening member <NUM> is not transferred to the elevation unit <NUM> and only the second fastening member <NUM> is smoothly rotated.

The restoration unit <NUM> restores the elevation unit <NUM> to its initial location as the second fastener <NUM> is separated from the first fastener <NUM>. The initial location of the elevation unit <NUM> may mean the state in which the elevation unit <NUM> has been lowered to the maximum extent within the case <NUM> and the lower side of the elevation guide member <NUM> has been seated in the stopper <NUM>. Accordingly, the restoration unit <NUM> can secure consistent assembly performance when the first fastener <NUM> and the second fastener <NUM> are repeatedly fastened together.

<FIG> is a perspective view illustrating a restoration unit in the fastening apparatus for a vehicle according to the second embodiment of the present disclosure.

Referring to <FIG> and <FIG>, the restoration unit <NUM> may include an elastic member <NUM>. The elastic member <NUM> is installed between the case <NUM> and the elevation unit <NUM>. The elastic member <NUM> is formed to have a form of a coil spring that is stretchably provided in a length direction thereof, and elastically supports the elevation unit <NUM> against the case <NUM>. The length direction of the elastic member <NUM> is parallel to the length direction of the case <NUM>. When the elevation unit <NUM> is placed at its initial location, the elastic member <NUM> may be installed in its neutral state so that an elastic force from the elastic member <NUM> is not generated in the length direction thereof.

Both ends of the elastic member <NUM> come into surface contact with the case <NUM> and the elevation unit <NUM>, respectively, and are supported by the case <NUM> and the elevation unit <NUM>. More specifically, each of the both ends of the elastic member <NUM> is formed to have a semicircular cross-section form, and the both ends of the elastic member <NUM> come into surface contact with the lower side of the top of the case <NUM> and the upper side of the elevation guide member <NUM>. Accordingly, the elastic member <NUM> can stably maintain a standing state without a special movement between the case <NUM> and the elevation unit <NUM> even without separate support means,.

A process of assembling the fastening apparatus for a vehicle having the aforementioned construction according to the second embodiment of the present disclosure is described as follows.

<FIG> are cross-sectional views illustrating a process of assembling the fastening apparatus for a vehicle according to the second embodiment of the present disclosure.

Referring to <FIG>, the first fastener <NUM> is inserted into the case <NUM>.

The entry guider <NUM> is inserted into the second fastening member <NUM> provided in the second fastener <NUM> that is disposed at its initial location thereof within the case <NUM>, along with the elevation unit <NUM>. In this case, as the width of the entry guider <NUM> is formed to be reduced toward the end thereof, the entry guider <NUM> can be smoothly inserted into the second fastening member <NUM>.

The work tool <NUM> is connected to the second fastening member <NUM> provided in the second fastener <NUM>.

The work tool <NUM> adds rotatory power to the second fastener <NUM> and simultaneously upward pushes the elevation unit <NUM>. In this case, as the elevation guide member <NUM> is formed to have a greater diameter than the tool hole part <NUM>, the work tool <NUM> can be prevented from coming into direct contact with the elastic member <NUM>.

As the elevation unit <NUM> moves upward at a predetermined distance, the inner circumference surface of the second fastening member <NUM> is engaged with the outer circumference surface of the extension part <NUM>.

The second fastener <NUM> is continuously rotated by the work tool <NUM>, spirally coupled to the first fastener <NUM>, and moved upward from the case <NUM> along with the elevation unit <NUM>.

In this case, the elastic member <NUM> is contracted in the length direction thereof, and accumulates an elastic restoration force.

As the upper side of the elevation member <NUM> comes into contact with the inner side of the second structure <NUM>, the assembly of the first fastener <NUM> and the second fastener <NUM> is completed.

A process of separating the first fastener <NUM> and the second fastener <NUM> from each other is performed in the inverse order of the process of fastening the first fastener <NUM> and the second fastener <NUM> together.

As the spiral coupling of the first fastener <NUM> and the second fastener <NUM> is released, the elastic member <NUM> extends in the length direction thereof by the elastic restoration force accumulated therein, and moves the elevation unit <NUM> and the second fastener <NUM> downward. Accordingly, the elevation unit <NUM> and the second fastener <NUM> are returned to their initial locations.

The fastening apparatus for a vehicle according to the present embodiment can prevent the waste of a machine and manpower for an additional feeding work and prevent a loss of parts upon assembly because parts necessary to fasten the first structure <NUM> and the second structure <NUM> are implemented as one assembly. The fastening apparatus for a vehicle according to the present embodiment can prevent a miss assembly because the second fastener <NUM> is supported by the elevation unit <NUM> in a way to be rotatable and movable up and down in the state in which the second fastener <NUM> has maintained its regular location with respect to the first fastener <NUM>.

The fastening apparatus for a vehicle according to the present embodiment can reduce the number of parts because the second fastener <NUM> is directly rotatably supported by the elevation unit <NUM>.

In the fastening apparatus for a vehicle according to the present embodiment, the hook <NUM> comes into contact with the top of the case <NUM> on the inside thereof, and the support member <NUM> does not come into contact with the top of the case <NUM> on the inside thereof by the hook <NUM>. Although the second fastener <NUM> continues to be rotated, the free end of the support member <NUM> that has been formed to be round so that the free end has given curvature comes into contact with the inner side of the insertion groove <NUM> that has been formed to be round so that the inner side has given curvature. A lubricant is applied on the inner side of the insertion groove <NUM>. The gap G is formed between the support member <NUM> and the hook <NUM>. Accordingly, the elevation unit <NUM> can be prevented from being broken because rotatory power of the second fastener <NUM> is not transferred to the elevation unit <NUM> and only the second fastener <NUM> is smoothly rotated.

The fastening apparatus for a vehicle according to the present embodiment can improve efficiency and consistency of an assembly because the first fastener <NUM> and the second fastener <NUM> can be repeatedly fastened together and separated from each other by the restoration unit <NUM>.

The fastening apparatus for a vehicle according to the present embodiment can reduce the weight of a product and can be more easily assembled because both ends of the restoration unit <NUM> come into direct surface contact with the case <NUM> and the elevation unit <NUM>.

The fastening apparatus for a vehicle according to the present embodiment can prevent interference with the work tool <NUM> because the restoration unit <NUM> is disposed between the upper side of the elevation guide member <NUM> and the inner side of the case <NUM> on the upper side thereof.

Claim 1:
A fastening apparatus (<NUM>) for a purpose-built vehicle comprising an indoor space, comprising:
a first fastener (<NUM>) configured to be fixed to a first structure (<NUM>), the first structure (<NUM>) being a top hat or a battery module of the vehicle;
a second fastener (<NUM>) coupled to a case (<NUM>) configured to be fixed to a second structure (<NUM>), the second structure being a chassis frame of the vehicle, and configured to have the first fastener (<NUM>) inserted therein;
a fixing unit (<NUM>) movably installed in the second fastener (<NUM>) and configured to move in a direction that intersects a direction in which the first fastener (<NUM>) is inserted, and to selectively limit relative movements of the first fastener (<NUM>) and the second fastener (<NUM>); and
an elevation unit (<NUM>) installed in the case in a way to move up and down, and configured to be moved up and down by an external force that is applied from a work tool (<NUM>) and adjust the direction in which the fixing unit (<NUM>) moves,
characterized in that the elevation unit (<NUM>) comprises:
an elevation member (<NUM>) disposed to surround the second fastener (<NUM>) and installed in a way to be slidable in a length direction of the second fastener (<NUM>);
an elevation guide member (<NUM>) extended in parallel to a length direction of the elevation member (<NUM>), and on which a rail part (<NUM>) formed in the case (<NUM>) is seated; and
a guide member (<NUM>) provided between the elevation member (<NUM>) and the second fastener (<NUM>) and configured to provide guidance to a movement of the fixing unit (<NUM>) while operating in conjunction with an elevation movement of the elevation member (<NUM>).