JPH09123767A - Hinge device for automobile door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a large frictional resistance from working on a hinge arm when a door is in its initial angle range and when it is in its final angle range by providing a resistance imparting means which imparts frictional resistance to the hinge arm only when the door is in its medium angle range. SOLUTION: A hinge arm 6 has a hollowed-out, rectangular cross-sectional shape, and a pivot pin 8 is passed through both side walls 26, 27 of the hinge arm 6 and both side walls 28, 29 of a hinge support 9. A bush 23 is secured to the hinge arm 6 in such a way that it can be rotated integrally with the hinge arm 6. Projections 34, 35 projecting radially from the boss part of the bush 23 are integrated with the bush 23. Beads 36, 37 are projected form the surfaces of the side walls 28, 29 and extend as circles around the center of the pivot pin 8. By selecting the positions where the beads 36, 37 are formed, a luggage door is allowed to come to a free stop.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge support fixed to a vehicle body, and a hinge having one end fixed to a base end of an opening / closing body and the other end pivotally attached to the hinge support. The present invention relates to a hinge device for an opening / closing body of an automobile, which includes an arm and an urging member that exerts an external force on the hinge arm to apply a moment in an opening direction to the opening / closing body.

[0002]

2. Description of the Related Art Various types of opening / closing bodies are pivotally attached to an automobile body so as to be rotatable and openable. Typical examples are a luggage door that opens and closes the upper opening of the luggage room, a back door that is pivotally supported at the rear of the vehicle body, and a hood panel that opens and closes the upper opening of the engine room. It has been publicly known that such an opening / closing body is openably / closably supported on a vehicle body via a hinge device of the type described above.

Such a hinge device pivotally supports the opening / closing body so as to be rotatable and openable / closable with respect to the vehicle body, and imparts a moment in the opening direction to the opening / closing body by its urging member. A moment in the closing direction acts on the opening / closing body due to its own weight including the hinge arm. However, by using the hinge device of the above type, a moment in the opening direction can be applied to the opening / closing body. Can easily open and close the body with a small force.

At this time, the opening and closing body is rotated from the fully closed position by a predetermined angle and the opening and closing body is rotated by a predetermined angle from the fully opened position to the fully opened position. When the opening / closing body exists in an intermediate angle range excluding the end angle range, the closing moment and the opening moment acting on the opening / closing body are set so that the opening / closing body will make a free stop. . “Free stop” means that the opening / closing body itself stops at the position when the operator releases the opening / closing body.
The function is to bring the opening / closing body to an arbitrary position within the intermediate angle range, and when the hand is released from the opening / closing body, the opening / closing body stops at the arbitrary position. According to this structure of the hinge device, the opening / closing body can be stopped at a desired angular position in the intermediate angle range without pressing the opening / closing body with a hand or the like, and the opening / closing body is kept in the open position. It is possible to carry out predetermined work such as taking in and out of luggage.

On the other hand, when the opening / closing body is rotated beyond the intermediate angle range to the above-mentioned end angle range, the moment in the opening direction by the urging member is larger than the moment in the closing direction by the weight of the opening / closing body including the hinge arm. It is usual that the opening / closing body is automatically rotatable to the fully opened position without manually lifting the opening / closing body reaching the end angle range. With this configuration, the operability of the opening / closing body can be improved, and the opening / closing body can be reliably held in the fully open position.

Even when the opening / closing body is within the above-mentioned initial angle range, the moment in the opening direction by the biasing member is
When the magnitude of each moment is set so that it is larger than the moment in the closing direction due to the weight of the opening / closing body including the hinge arm, and when the lock for the opening / closing body in the fully closed position is released, the opening / closing body is in the fully closed position. It is usually configured to bounce up a small angle from. By flipping up the opening / closing body from the fully closed position by a slight angle in this manner, the operator can easily grasp the opening / closing body by hand. Such a flip-up is generally called a hop-up of an opening / closing body.

As described above, when the opening / closing body is in the terminal angle range and the initial angle range, the magnitudes of the opening and closing moments acting on the opening / closing body can be set by selecting various modes. However, when the opening / closing body is in the intermediate angle range, it must be free-stopped.

In order to obtain such a free stop function, the magnitude of the closing moment acting on the opening / closing body due to the weight of the opening / closing body including the hinge arm and the hinge arm opening / closing by the biasing member. It suffices to balance the magnitude of the opening moment applied to the body. However, it is not possible to set the self-weight of the opening / closing body and the urging force of the urging member so that the magnitudes of both moments are completely the same regardless of the position of the opening / closing body within the intermediate angle range. Have difficulty. Further, according to this configuration, the intermediate angle range in which the opening / closing body can be freely stopped is extremely narrowed, and the usability of the opening / closing body is deteriorated.

Therefore, conventionally, when a frictional resistance is applied to the hinge arm and the opening / closing body is in an intermediate angle range, there is a slight difference in magnitude between the closing moment and the opening moment acting on the opening / closing body. Also, the frictional resistance acting on the hinge arm compensates for the difference in magnitude between the two moments, and the opening / closing body can be freely stopped in a wide intermediate angle range.

However, according to this structure, a large frictional resistance acts on the hinge arm when the opening / closing body is in the initial angle range or in the terminal angle range, so that the opening / closing body is in the fully closed position. When configured to hop up from, the amount of hop up is extremely small. Further, when the opening / closing body reaches the end angle range, even if the opening / closing body is automatically rotated to the fully open position, the opening / closing body reaching the end angle range is quickly rotated to the fully open position. However, there is a risk that the sense of moderation when the openable body is brought to the fully open position may be lost.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hinge device for a vehicle opening / closing body of the type described at the outset in which the above-mentioned drawbacks of the prior art can be eliminated with a simple construction.

[0012]

In order to achieve the above object, the present invention provides a hinge device for an opening / closing body of the type described at the beginning, in which an initial angle until the opening / closing body is rotated by a predetermined angle from its fully closed position. When the opening / closing body exists in the intermediate angle range excluding the range and the end angle range during which the opening / closing body rotates from the position on the front side by a predetermined angle from the fully opened position to the fully opened position, the opening / closing body is free-stopped. As described above, there is proposed a hinge device for an opening / closing body of an automobile, which is provided with a resistance applying means for providing a frictional resistance to the hinge arm only when the opening / closing body is in an intermediate angle range.

At this time, the resistance applying means is fitted with a pivot pin for pivotally attaching the hinge arm to the hinge support, and a projection protruding in the radial direction from a boss portion of the bush which rotates integrally with the hinge arm. A bead press-contacted to the protrusion formed on a hinge support surface facing the protrusion, the protrusion and the bead are in pressure contact with each other when the opening and closing body is in an intermediate angle range, When the opening / closing body is in the initial angle range or the end angle range, it is advantageous that the formation positions of the protrusion and the bead are set so that the protrusion and the bead are separated from each other.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will now be described in detail with reference to the drawings, and the above-mentioned conventional drawbacks will be more specifically clarified with reference to the drawings.

FIG. 1 is a luggage door 1 which is an example of an opening / closing body.
2 is an external perspective view of the rear part of the vehicle having the above, FIG. 2 is a plan view of the rear part of the vehicle when the luggage door 1 is closed, and FIG. 3 is a sectional view taken along line III-III of FIG. The luggage door 1 opens and closes an upper opening of a luggage room 19 provided in the rear portion of the vehicle body for storing luggage.

1 to 3, a back window glass 2 located at a rear portion of a vehicle compartment of an automobile is fixed to a vehicle body 3, and a luggage door 1 is provided behind the window glass 2 and a hinge device 4 for an opening / closing body.
It is supported to be rotatable and openable in the directions of arrows A and B via. Reference numeral 5 in FIG. 3 denotes a package tray that covers the vehicle body portion below the back windshield.

As shown in FIG. 4, the opening / closing body hinge device 4 includes a hinge support 9 fixed to the vehicle body 3 and a hinge arm 6 having one end fixed to the base end of the luggage door 1 by a bolt 7. Have The other end of the hinge arm 6 is pivotally attached to a hinge support 9 via a pivot pin 8. The hinge support 9 is integrally fixed to the lower surface of the vehicle body portion located below the package tray 5 by bolts 10 or welding. In this way, the other end of the hinge arm 6 is pivotally attached to the vehicle body 3 via the hinge support 9 so that the luggage door 1 can be moved around the center P of the pivot pin 8 by an arrow. It is pivotally supported on the vehicle body 3 so as to be rotatable and openable and closable in the A and B directions.

The portion where the hinge arm 6 is fixed to the luggage door 1, that is, the portion of the bolt 7, and the portion where the arm 6 is pivotally attached to the hinge support 9, that is, the pivot pin 8.
At the hinge arm portion between the pressure link 11 and
One end side of the is pivotally attached via a pin 12.

The hinge support 9 has an inverted U-shaped cross section, and notches 13 are formed on both side walls thereof as shown in FIGS. 2 to 4, and these notches are formed in the width direction of the vehicle body 3. One end side of the extending torsion bar 20 is engaged, and a tip end portion of the torsion bar 20 on one end side is engaged with a locking hole 15 formed in one side wall of the hinge support 9.

Similarly, another one extending in the width direction of the vehicle body 3
One side of each torsion bar 14 has a hinge support 9
Engages with the notch 16 formed in the other side wall, and the tip end portion on one end side thereof engages with the locking hole 128 formed in the one side wall, and the torsion bar portion therebetween is curved downward. The curved lower portion is engaged with the notch 17 formed in the front end portion of the pressure link 11. This torsion bar 14 is referred to as a first torsion bar, and the torsion bar 2 described above is used.
0 will be referred to as the second torsion bar.

The structure of the hinge device 4 for the opening and closing body on the right side in the forward direction of the automobile has been described above. As shown in FIG. 2, the hinge support 9a and the pressure link 11a have the first and second hinge supports 9a and 11a on the left side. Second torsion bar 14, 20
The other end side of each is engaged. At that time, the positions of the first and second torsion bars 14 and 20 cross each other between one end side and the other end side, and the other end side of the second torsion bar 20 engages with the pressure link 11a. I am fit. As described above, the left and right side structures of the opening / closing body hinge device 4 are substantially bilaterally symmetrical. Therefore, for each element on the left side, the reference numeral given to the element on the right side is added with a. However, the description of the structure on the left side is omitted.

First and second torsion bars 14, 20
Are assembled in the respective hinge supports 9 and 9a in a pre-twisted state, and the pressurizing links 11 and 11a are pressed by the elastic force thereof, whereby the pressurizing links 11 and 11a are respectively attached to the hinge arms 6 and 6. 2 for 6a
And the force indicated by F in FIG. Therefore, assuming that the length of the perpendicular line drawn from the center P of the pivot pin 8 in the direction of the force F as shown in FIG. 3 is L, the hinge arm 6 and the luggage door 1 are shown.
The first torsion bar 14 imparts a moment FL to the shaft around the center P of the pivot pin 8. Exactly the same, the second torsion bar 20 also applies the same moment to the hinge arm 6a and the luggage door 1 about the center P of the pivot pin 8a. These moments are the moments that open the luggage door 1.

When the luggage door 1 is in the fully closed position as shown in FIGS. 2 and 3, the luggage door 1 is moved to the position shown in FIG.
It is fixedly locked to the vehicle body 3 by the lock device 18 shown in FIG. The operator unlocks the lock device 18, lifts the free end side of the luggage door 1,
The luggage door 1 can be rotated and opened in the direction of arrow A around the center P of the pivot pins 8 and 8a. At this time, due to the weight of the luggage door 1 including the hinge arms 6 and 6a, a moment in the closing direction acts on the luggage door 1 around the center P of the pivot pins 8 and 8a. Second torsion bar 1
Since a moment in the opening direction is given by 4, 20, the operator can easily open the luggage door 1 with an extremely small force. When the luggage door 1 is rotated in the closing direction, the luggage door 1 is returned to the closed position shown in FIGS. 2 and 3, and is locked to the vehicle body 3 by the lock device 18.

As described above, the illustrated hinge device 4 for the opening / closing body is different from the luggage door 1 which is an example of the opening / closing body in
The hinge arms 6 and 6 are provided to impart a moment in the opening direction.
There is a biasing member that exerts an external force F on a, and in this example, the first and second torsion bars 14 and 20 form the biasing member.

The luggage door 1 has a closing moment due to its own weight, and the first and second torsion bars 1.
Although moments in the opening direction due to the spring forces of 4 and 20 act, FIG. 5 is a diagram showing an example of the relationship between the magnitude of each moment and the opening degree of the luggage door 1, and the solid line X indicates the first
And the magnitude of the opening moment applied to the luggage door 1 by the second torsion bars 14 and 20, and the chain line Y indicates the closing moment due to the own weight of the luggage door 1 including the weights of the hinge arms 6 and 6a. Shows.

Here, as indicated by reference numeral S1 in FIG. 5, an angle range from the fully closed position of the luggage door 1 to a predetermined angle rotation is referred to as an initial angle range, and similarly, reference numeral S in FIG.
As shown by 3, the angle range during which the luggage door 1 is rotated from the front position by a predetermined angle from the fully open position to the fully open position is referred to as a terminal angle range. Similarly,
The angle range excluding the both angle ranges S1 and S3 will be referred to as an intermediate angle range S2. When the luggage door 1 is in the intermediate angle range S2, the hinge device 4 is configured so that the luggage door 1 is free-stopped. There is. With this configuration, even if the operator opens the luggage door 1 to a desired position in the intermediate angle range and then releases the hand from the luggage door 1, the luggage door 1 stops at that position. Therefore, it is possible to easily load and unload luggage into and from the luggage room 19.

On the other hand, the luggage door 1 has an intermediate angle range S2.
When it rotates beyond the end angle range S3 to the end angle range S3, as can be seen from FIG. 5, the opening by the first and second torsion bars 14, 20 is larger than the moment by the own weight of the luggage door 1 including the hinge arms 6, 6a. Since the moment in the direction is larger, the luggage door 1 that has reached the end angle range S3 automatically rotates to the fully open position without lifting it by hand. As a result, the operability of the luggage door 1 is enhanced, and the luggage door 1 can be reliably held in its fully opened position.

Even when the luggage door 1 is in the initial angle range S1, the moment in the opening direction by the first and second torsion bars 14, 20 is larger than the moment in the closing direction by its own weight including the hinge arms 6, 6a. Is bigger. Therefore, when the lock is released for the luggage door 1 in the fully closed position as shown in FIGS. 2 and 3, the luggage door 1 jumps up by a slight angle corresponding to the initial angle range S1. This is the hop-up of the luggage door 1, and the operator can easily reach for the luggage door 1 by the hop-up. Further, in this example, when the luggage door 1 is at the fully closed position, the luggage door 1 is pressed against the weather strip 25 fitted to the flange portion 24 of the vehicle body 3 that defines the luggage room 19. The weather strip 25 is made of an elastic material such as rubber, and is compressed by the luggage door 1 which occupies the fully closed position. The weather strip 25 has a function of pressure-contacting the luggage door 1 in the fully closed position to seal the luggage room 19 from the outside of the vehicle. At this time, the weather strip 25 is pressed by the luggage door 1 and elastically deformed. Therefore, it exerts elasticity on the luggage door 1 in the direction in which it opens. Therefore,
When the lock of the lock device 18 is released, the luggage door 1
Also hops up due to the elasticity of the weatherstrip 25.

By the way, as described above, the luggage door 1
Is in the intermediate angle range S2, the luggage door 1
Can be a free stop. In order to obtain such a free stop function, the magnitude X of the opening moment by the first and second torsion bars 14, 20 and the closing direction by the own weight of the luggage door 1 including the hinge arms 6, 6a. The magnitudes of the respective moments may be set so that the magnitude Y of the moment becomes equal. In the example shown in FIG. 5, when the luggage door 1 exists within the angle range indicated by T, the magnitudes of both moments X and Y are obtained.
Are almost equal. However, it is difficult to completely match the magnitudes X and Y of both moments, and even in the example shown in FIG. The moment due to is slightly larger. If the free stop function is to be obtained only by balancing the two moments, the range in which the two moments are balanced becomes narrower than the intermediate angle range S2 in which the free stop function is actually obtained. That is, even if the magnitudes X and Y of both moments can be perfectly matched in the angle range indicated by T, this range T is the intermediate angle range S2.
Therefore, the luggage door 1 cannot be freely stopped within a desired angle range.

Therefore, conventionally, as described above,
When frictional resistance is applied to the hinge arms 6 and 6a and the luggage door 1 is in the intermediate angle range S2, even if there is a slight difference between the moment in the closing direction and the moment in the opening direction acting on the luggage door 1, the hinge arms 6 and 6a. The difference in magnitude of both moments is compensated by the frictional resistance acting on the luggage door 1, and the luggage door 1 can be three-stopped in a wide intermediate angle range S2. For example, to pivot hinge arm 6 to hinge support 9 as shown in FIG.
Bushings 122 and 123 fitted to the pivot pin 8 by strongly caulking the pivot pin 8 penetrating the both at a portion indicated by reference numeral 21.
It is made possible to exert a large frictional resistance between the hinge arm 6 and the hinge support 9 via the. With this configuration, when the luggage door 1 is in the intermediate angle range S2, it can be stopped freely.

However, according to this structure, even when the luggage door 1 is in the angular ranges S1 and S3 other than the intermediate angular range S2, a large frictional resistance acts on the luggage door 1, so that the hop-up amount of the luggage door 1 is increased. It becomes extremely small, and it becomes difficult for the operator to grasp the luggage door 1 by hand. The initial angle range in which the luggage door 1 hops up becomes very small. Further, even when the luggage door 1 is rotated to the terminal end angle range S3, a large frictional resistance acts on the luggage door 1, so that the luggage door 1 cannot swiftly rotate to its fully opened position. The feeling of moderation when the is rotated to the fully open position is reduced, and the operation feeling is deteriorated.

Therefore, the hinge device 4 for the opening / closing body of this example is configured as follows.

FIG. 6 shows a hinge arm 6 and a hinge support 9.
FIG. 7 is an exploded perspective view of the pivotally attached portion of FIG. 7, and FIG. 7 is a sectional view taken along line VII-VII in FIG. As can be seen from these figures, the hinge arm 6 has a rectangular cross-sectional shape with a hollow inside, and has both side walls 26, 27,
The pivot pin 8 extends through both side walls 28, 29 of the hinge support 9. The pivot pins 8 have bushes 22 and 23.
Respectively, the bushes 22 and 23 are located inside the side walls 28 and 29 of the hinge support 9, and the hinge arms 6 are attached to the boss portions 30 and 31 of the bushes 22 and 23, respectively.
The holes are fitted together. At that time, each bush 22, 23
Is fixed to the hinge arm 6 so that the hinge arm 6 can rotate together with the hinge arm 6. The pivot pin 8 is a hinge support 9
The bushes 22 and 23 can be freely rotated around the pivot pin 8. The pivot pin 8 may be rotatably supported with respect to the hinge support 9, and in that case, the bushes 22 and 23 may be fixed to the pivot pin 8. The stopper rings 32 and 33 detachably fitted to the pivot pin 8 prevent the bushes 22 and 23 and the pivot pin 8 from coming out of the hinge support 9 and the hinge arm 6.

As shown in FIG. 8, each bush 22, 2
3, projections 34 and 35 that project radially from the bosses 30 and 31 are integrally provided, and in the illustrated example, each bush 22 and 23 is provided with a pair of projections 34 and 35.

On the other hand, on the surfaces of the side walls 28, 29 of the hinge support 9 facing the above-mentioned projections 34, 35, beads 36, 37 corresponding to the projections 34, 35 are formed to project, and the beads 36 are formed. , 37 extend in an arc around the center P of the pivot pin 8.

FIG. 9 shows the protrusions 34 and 35 and the beads 36 and 3.
7 is an explanatory view showing a relative positional relationship with FIG. 7, and when the luggage door 1 is in the above-described initial angle range S1, as shown in (a) of FIG.
Away from 37. Similarly, when the luggage door 1 is in the end angle range S3, as shown in (c) of FIG.
The protrusions 34 and 35 are separated from the beads 36 and 37.

On the other hand, when the luggage door 1 is in the intermediate angle range S2, the protrusions 34, 35 are pressed against the beads 36, 37 facing the protrusions 34, 35, as shown in FIG. 9B. FIG. 7 shows the situation at this time. Thus, only when the luggage door 1 is in the intermediate angle range S2, the protrusions 34 and 35 and the beads 36 and 37 are brought into pressure contact with each other, whereby frictional resistance is given to the hinge arm 6.

Even on the left side of the opening / closing body hinge device 4,
Although the structure is exactly the same as that shown in FIGS. 6 to 9, the protrusion and the bead as shown in FIGS. 6 to 9 may be formed on only one of the left and right sides.

With the above construction, when the luggage door 1 is in the intermediate angle range S2, even if there is a slight difference in the magnitudes X and Y of both moments, the above-mentioned frictional resistance imparted to the hinge arms 6 and 6a. Thus, the luggage door 1 can be stopped at any position within the range S2. The three-stop function of the luggage door 1 is guaranteed.

On the other hand, when the luggage door 1 is in the initial angle range S1 and the end angle range S3, the projection 34,
Since 35 and the beads 36, 37 are separated from each other, the frictional resistance due to their pressure contact does not act on the hinge arm 6. The same applies to the left hinge arm 6a.
For this reason, when the lock is released to the luggage door 1 in the fully closed position, the luggage door 1 has the first and second torsion bars 14 and 20 and the weather strip 25.
The elasticity of and bounces up a desired angle, and the desired hop-up amount is guaranteed. The desired initial angle range S1 can be secured. As a result, the operator can easily put his / her hand on the luggage door 1. When the luggage door 1 shifts from the intermediate angle range S2 to the end angle range S3, the spring force of the torsion bars 14 and 20 causes the luggage door 1 to quickly and automatically rotate to its fully open position, giving the operator a pleasant moderation. Can be given.

As described above, in the hinge device 4 for the opening / closing body shown in the figure, the initial angle range S1 from the fully closed position of the luggage door 1 to the predetermined angle rotation, and the predetermined angle of the luggage door 1 from the fully opened position to the predetermined angle. When the luggage door 1 exists in the intermediate angle range S2 excluding the terminal angle range S3 during the rotation from the position on the front side to the fully open position, the luggage door 1 is free-stopped so that the luggage door 1 is in the intermediate angle range S2. Only when the hinge arm 6 is in position, there is provided a resistance applying means for applying frictional resistance to the hinge arms 6 and 6a. Then, the resistance applying means of this example is such that the hinge arms 6 and 6a are fitted to the pivot pins 8 and 8a pivotally attached to the hinge supports 9 and 9a, and are rotated integrally with the hinge arms 6 and 6a. Projections 34 and 35 protruding in the radial direction from the boss portions 30 and 31 of 23, and the projection 3
Beads 36 and 37 are formed on the hinge support surface facing the projections 4 and 35 so as to project against the projections 34 and 35. When the luggage door 1 is in the intermediate angle range S2, the protrusions 34, 35 and the beads 36, 37 are in pressure contact with each other, and when the luggage door 1 is in the initial angle range S1 or the end angle range S3, the protrusions 34, 35 and the beads 36. ，
The formation positions of the protrusions 34 and 35 and the beads 36 and 37 are set so that the protrusions 37 and 37 are separated from each other.

By the way, in the conventional structure shown in FIG. 10, it is necessary to crimp the pivot pin 8 to assemble the hinge arm 6 and the hinge support 9. However, in order to perform such crimping, a machining apparatus therefor is required. In addition, the cost of the entire assembly including the hinge arm, the hinge support, and the pivot pin is high because of the large amount of time and labor required for the work.

On the other hand, in the structure shown in FIGS. 6 and 7, the pivot pin 8 is inserted into the hinge arm 6 and the hinge support 9, and the retaining rings 32 and 33 are fitted to the pivot pin 8 to form the assembly. A solid body can be assembled, and it is not necessary to crimp the pivot pin 8. Therefore, the total cost of the assembly, and eventually the opening / closing body hinge device, can be effectively reduced.

Further, in the conventional structure shown in FIG. 10, since the caulking strength at the time of caulking varies, the frictional resistance force applied to the hinge arm 6 and the luggage door 1 also varies. Therefore, when the luggage door 1 is opened and closed, the sliding resistance applied to the luggage door 1 varies, and the hop-up amount may vary. On the other hand, in the configuration shown in FIG. 6 and FIG. 7, since caulking is not required, it is possible to prevent the conventional variation and further improve the operation feeling when the luggage door 1 is opened and closed. .

In the structure shown in FIG. 10, the spring force of the torsion bar, the weight of the luggage door including the hinge arm, and the frictional force acting on the hinge arm cause
Although the range S2 in which the luggage door is free-stopped is determined, it is difficult to determine the range S2 uniformly because the frictional force varies. On the other hand, according to the configurations shown in FIGS. 6 and 7, by selecting the positions where the beads 36 and 37 are formed, the angle range S2 in which the luggage door 1 is free-stopped is freely and uniformly set. It is possible to increase the degree of freedom in design.

Although the torsion bar is used as the urging member in the embodiment described above, an urging member having an appropriate shape such as a tension spring or a compression spring may be used.

The present invention can be applied not only to luggage doors but also to various hinge devices for opening / closing bodies such as hood panels or back doors.

[0048]

According to the opening / closing body hinge device for an automobile of claim 1, when the opening / closing body is in the initial angle range or the terminal angle range, the frictional resistance by the resistance applying means does not act on the hinge arm. Therefore, it is possible to eliminate the disadvantage of the conventional hinge device in which a large frictional resistance acts on the hinge arm regardless of the angle range of the opening / closing body.

According to the hinge device for an opening / closing body of an automobile according to claim 2, the cost can be reduced, the feeling at the time of opening / closing the opening / closing body can be improved, and the angle range in which the opening / closing body is free-stopped can be freely set. Can be set.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rear portion of an automobile with a luggage door opened.

FIG. 2 is a plan view of the rear portion of the vehicle with the luggage door closed, showing the outline of the hinge device for the opening / closing body.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view of a hinge device for an opening / closing body.

FIG. 5 is a characteristic diagram showing an example of the relationship between the magnitude of the moment acting on the luggage door and the opening of the luggage door.

FIG. 6 is an exploded perspective view showing a hinge support and a hinge arm separately.

7 is a VI of FIG. 6 when the bead and the protrusion are pressed against each other with the hinge support and the hinge arm assembled together.
It is an I-VII line sectional view.

FIG. 8 is a perspective view of a bush.

FIG. 9 is a side view illustrating the operation of the protrusion and the bead.

FIG. 10 is a sectional view similar to FIG. 7, showing a conventional configuration example.

[Explanation of symbols]

 3 vehicle body 4 hinge device for opening / closing body 6 hinge arm 6a hinge arm 8 pivot pin 8a pivot pin 9 hinge support 9a hinge support 22 bush 23 bush 30 boss portion 31 boss portion 34 protrusion 35 protrusion 36 bead 37 bead S1 initial angle range S2 middle Angle range S3 End angle range

Claims (2)

[Claims] 1. A hinge support fixed to a vehicle body, a hinge arm whose one end side is fixed to a base end portion of the opening / closing body, and the other end side is rotatably pivoted with respect to the hinge support, and an opening / closing body. To give a moment in the opening direction,
A hinge device for an opening / closing body of an automobile, comprising: an urging member that exerts an external force on the hinge arm, wherein the opening / closing body has an initial angle range from the fully closed position to a predetermined angle, and the opening / closing body When the opening / closing body is in an intermediate angle range excluding the terminal angle range during the rotation from the position on the predetermined angle front side to the fully opening position to the fully opening position, the opening / closing body is set so as to stop freely. A hinge device for an opening / closing body of an automobile, comprising a resistance applying means for providing a frictional resistance to the hinge arm only when in an intermediate angle range. 2. A projection, wherein the resistance applying means is fitted in a pivot pin that pivotally attaches the hinge arm to the hinge support, and a protrusion protruding in the radial direction from a boss portion of a bush that rotates integrally with the hinge arm. A bead that is formed on the hinge support surface facing the protrusion and is in pressure contact with the protrusion, the protrusion and the bead are in pressure contact with each other when the opening / closing body is in the intermediate angle range, and the opening / closing body is in the initial angle range. Alternatively, the hinge device for an opening / closing body of an automobile according to claim 1, wherein the formation positions of the protrusion and the bead are set such that the protrusion and the bead are separated from each other when in the end angle range.