JP5594499B2 - Trunk lid opening / closing structure - Google Patents

Description

  The present invention relates to a trunk lid opening and closing structure for opening and closing a trunk lid of a vehicle.

  Many sedan-type vehicles have a trunk lid at the rear of the vehicle body, and the trunk room is opened and closed by opening and closing the trunk lid. Such a trunk lid opening / closing structure of the vehicle includes a pair of left and right hinges having hinges on both sides in the vehicle width direction, specifically, a hinge base fixed to the vehicle body and a hinge arm rotatably connected to the hinge base. A structure is used in which the trunk lid is supported by the hinge arm of the hinge so as to be opened and closed.

  By the way, the trunk lid is a heavy component. Therefore, a considerable burden is imposed on the opening operation of the trunk lid. Therefore, in the opening / closing structure of the trunk lid, a torsion bar is bridged between the hinge base of one side of the pair of left and right hinges and the hinge arm of the other side, and the trunk lid is biased in the opening direction by the twisting force of the torsion bar Thus, assisting the opening operation of the trunk lid is performed.

  To support the end of the torsion bar on the hinge base side, the end of the torsion bar as disclosed in Patent Document 1 is folded back into a U-shape so that the support is simple. And a pair of receiving portions for receiving the proximal end portion of the folded portion and the distal end portion folded back from the proximal end portion in a direction facing each other on the hinge base, and the end of the torsion bar is hinged A structure supported by a base is used.

JP 2010-215135 A

By the way, when the trunk lid is operated from “open” to “closed” and from “closed” to “open”, the end on the hinge arm side is displaced with the end on the hinge base side as a fulcrum.
However, since the pair of receiving portions formed on the hinge base only receives the folded portion to which the twisting force is applied and restricts the movement of the torsion bar in the twisting direction, when the trunk lid is opened and closed, each portion of the folded portion becomes a pair. A behavior that deviates from the receiving portion occurs. When the folded portion is displaced, the distal end side portion and the proximal end side portion are rubbed with the pair of receiving portions, and abnormal noise may be generated.

When abnormal noise occurs, lubricant such as grease is applied to deal with it. However, this is only a temporary measure. For this reason, no fundamental measures have been taken, and the tendency for abnormal noise to be generated is inevitable.
SUMMARY OF THE INVENTION An object of the present invention is to provide a trunk lid opening / closing structure that has a simple structure and prevents the folded portion from shifting when the trunk lid is opened / closed.

  According to the first aspect of the present invention, there is provided a pair of left and right hinges having a hinge base fixed to the vehicle body and a hinge arm rotatably connected to the hinge base so as to open and close the trunk lid. In a trunk lid opening / closing structure having a torsion bar that is spanned between a hinge base on one side and a hinge arm on the other side and urges the trunk lid in the opening direction by a twisting force. A folded portion having a proximal end portion, a distal end portion folded back from the proximal end portion, and a central portion located between the proximal end portion and the distal end portion. The hinge base is formed in a pair of receiving portions for receiving the distal end side portion and the proximal end side portion from directions facing each other, and a portion facing the central portion, And a central portion and capable of abutting abutment, the torsion bar, and the providing a biasing structure for biasing the central portion in the direction abuts an abutment.

In the second aspect of the present invention, the biasing structure portion is formed on the distal end side portion and the proximal end side portion so as to be inclined in a direction away from the central portion, and is inclined to contact with the receiving portion at an angle. It was supposed to have a part.
According to a third aspect of the present invention, the inclined portion is formed by bending the distal end side portion and the proximal end side portion obliquely.

According to the first aspect of the present invention, due to the biasing of the biasing structure portion, the intermediate portion of the folded portion, that is, the central portion between the base end side portion and the tip end side portion is a contact portion formed on the hinge base. At the end, the entire folded portion is constrained to the initial state in which it comes into contact with the contact portion, that is, a fixed posture. That is, the folded portion is kept in a constant posture.
Therefore, when the trunk lid is opened and closed, the folded portion is prevented from being displaced (displaced) with respect to the receiving portion. For this reason, when the trunk lid is opened and closed, it is possible to prevent the front end side portion and the base end side portion of the folded portion from rubbing against the receiving portion, and it is possible to prevent the generation of abnormal noise due to the rubbing.

According to the invention of claim 2, a simple structure is possible in which the torsional force of the torsion bar is utilized and the central portion of the folded portion is brought into contact with the contact portion of the hinge base by the inclination of the inclined portion.
According to the invention of claim 3, the inclined portion can be a simple structure utilizing an existing member in which the distal end side portion and the proximal end side portion of the folded portion are bent obliquely. Moreover, the inclined portion not only presses the central portion of the folded portion against the hinge base contact portion, but can also play a role of dispersing concentrated stress when the trunk lid is opened and closed.

The perspective view which shows the opening / closing structure of the trunk lid which concerns on one Embodiment of this invention. The perspective view which expands and shows the torsion bar and hinge which assist the opening operation of the trunk lid. FIG. 3 is a plan view of a torsion bar and a hinge as viewed from an arrow A in FIG. 2. The top view explaining the behavior of the folding | turning part of the torsion bar accompanying the opening and closing of the conventional trunk lid. The perspective view which expanded the support structure of the torsion bar end which the arrow B in FIG. 2 shows. The perspective view which shows the inclination part (biasing structure part) formed in the front end side part and base end side part of the contact part formed in the hinge base, and the folding | returning part. FIG. 6 is a cross-sectional plan view taken along the line CC in FIG. 5 showing a state in which the central portion of the folded portion is pressed against the contact portion of the hinge base. Sectional drawing which follows the DD line in FIG.

Hereinafter, the present invention will be described based on an embodiment shown in FIGS.
FIG. 1 shows a rear part of a vehicle to which the present invention is applied, for example, a sedan type vehicle. In FIG. 1, reference numeral 1 denotes a vehicle body having a cabin 2a at the center and a trunk room 2b at the rear, and 3 denotes the trunk room. A trunk lid that opens and closes an opening (not shown) above 2b.
The trunk lid 3 is supported by a pair of left and right hinges 5 that can be opened and closed (openable and closable) by a pair of left and right hinges 5 installed on the opening edge (vehicle body portion) of the trunk room 2b on the cabin 2a side. Two torsion bars 7 a and 7 b (for example, metal bar members) are incorporated in the pair of hinges 5 to assist the opening operation of the trunk lid 3.

In the perspective view of FIG. 2 and the plan view of FIG. 3 (arrow A in FIG. 2), the structure around the hinge 5 including the torsion bars 7a and 7b is shown enlarged.
First, with reference to FIG. 2 and FIG. 3, the opening / closing structure of the trunk lid 3 including the attachment structure of the torsion bars 7a, 7b will be described.
A pair of left and right (both sides in the vehicle width direction) pair of hinges 5 is a hinge base 6 made of sheet metal that is bolted (fixed) to the opening edge (body portion) of the trunk room 2b, and a pair formed on the hinge base 6. 1 has a C-shaped hinge arm 11 supported at one end so as to be rotatable in the vertical direction. The other end of each hinge arm 11 protrudes toward the trunk room 2b. The back surface of the trunk lid 3 is bolted (fixed) to each other end of the hinge arm 11, and the trunk lid 3 is opened from the closed position (full closed) indicated by α in FIGS. It is supported so that it can be opened and closed until fully open.

The torsion bar 7a is bridged between the hinge base 6 on one side (for example, the left side) of the pair of hinges 5 and the hinge arm 9 on the other side (for example, the right side) of the pair of hinges 5, and the torsion bar 7b is oppositely paired. Between the hinge base 6 on the other side (right side) of the hinge 5 and the hinge arm 9 on one side (left side) of the pair of hinges 5.
That is, one end portion of the torsion bar 7a assembled to the hinge base 6 is formed by a folded portion 13 having an end portion bent into a U shape, and the other end portion of the torsion bar 7a assembled to the hinge arm 9 on the opposite side. Is formed, for example, by a crank-shaped end 14 bent into a crank shape.

Of these, the folded portion 13 is formed on a support wall 15 formed on the hinge base 6, for example, a support wall 15 obtained by bending the inner end portion of the hinge base 6 shown in FIG. Supported.
Specifically, as shown in FIG. 5, the support wall 15 has a vertical wall shape whose end faces face in the longitudinal direction of the vehicle body, and a pair of notches 17a and 17b are formed at each end on both sides in the longitudinal direction of the vehicle. Is formed. The base end side portion 13b that forms the base end side of the folded portion 13 is inserted into the other of these notches 17a and 17b, here, for example, a U-shaped notch 17b on the front side. The distal end side portion 13a folded back from the proximal end side portion 13b (the portion arranged in parallel with the proximal end side portion 13b) is the other of the cutout portions 17a and 17b, here, for example, an L-shaped cutout portion on the back side. It is inserted into 17a. The central portion 13c located between the distal end side portion 13a and the proximal end side portion 13b of the remaining folded portion 13 is disposed along the wall surface of the support wall 15 between the notches 17a and 17b. Is attached to the support wall 15. The crank-shaped end portion 14 is locked to, for example, an arm portion near the fulcrum of the hinge arm 11.

  Here, the torsion bar 7a is twisted in the opening direction in which the trunk lid 3 is opened in advance, and applies a twisting force to the central portion 13c between the distal end portion 13a and the proximal end portion 13b. The notches 17a and 17b receive the twisting force applied from the distal end side portion 13a and the proximal end side portion 13b, and urge the trunk lid 3 in the opening direction. In addition, the cutout portions 17a and 17b receive the reaction force when the trunk lid 3 is opened and closed (the solid line hinge arm 11 and the torsion bar 7a in FIG. 3 are closed by the trunk lid, and the two-dot chain line hinge arm). 11 and torsion bar 7a indicate that the trunk lid is open).

Specifically, as indicated by an arrow F1 in FIG. 5, the tip end portion 13a is pressed against the end surface portion 18a located at the upper portion of the notch portion 17a by the twisting force of the torsion bar 7a. Further, as shown by an arrow F2 in FIG. 5, the base end side portion 13b is pressed against the end face portion 18b located at the lower portion of the notch portion 17b by the twisting force of the torsion bar 7a. That is, the upper end surface portion 18a of the L-shaped notch portion 17a and the lower end surface portion 18b of the U-shaped notch portion 17b are:
Receiving portions 19a and 19b for receiving the distal end portion 13a and the proximal end portion 13b from opposite directions are formed. With the same structure, the torsion bar end is supported while restricting the twisting direction of the torsion bar 7a.

About the attachment structure of the torsion bar 7b, only the attachment direction differs from the torsion bar 17a, and the structure of each part is the same, so the description and detailed drawings are omitted.
By the way, the structure in which the folded portion 13 of the torsion bars 7a and 7b is simply received by the pair of notches 17a and 17b (receiving portions 19a and 19b) is as follows. As shown in FIG. When “close” is operated to “open”, the folded portion 13 is displaced following the movement of the trunk lid 3 while being pressed against the end surface portions 18a and 18b of the notches 17a and 17b. . For this reason, the folding | returning part 13 may rub with the end surface parts 18a and 18b (upper side or lower side) of the notch parts 17a and 17b, and an abnormal noise may generate | occur | produce.

  Therefore, as a countermeasure against this, the hinge base 6 and the folded portion 13 are provided with means for preventing the generation of abnormal noise. As shown in FIGS. 5 to 8, in the hinge base 6, a contact portion 21 that can come into contact with the central portion 13 c is provided in a portion of the hinge base 6 that faces the central portion 13 c of the folded portion 13. 13 (torsion bar 7a) is provided with a urging structure portion 23 that urges the central portion 13c in a direction that abuts against the abutting portion 21.

  That is, as shown in FIGS. 5 to 8, the abutting portion 21 is a portion of the hinge base 6 that faces the central portion 13 c of the folded portion 13, here, a side surface portion between the notches 17 a and 17 b of the support wall 15. The projection 25 is provided on the (plate surface portion). Specifically, the protrusion 25 is formed of a trapezoidal ridge protruding from the side surface portion between the notches 17 a and 17 b toward the central portion 13. Incidentally, the ridge extends along the vertical direction, and the protruding surface is formed as a flat surface parallel to the central portion 13c.

The urging structure portion 23 has a structure in which inclined portions 27a and 27b are formed on the distal end side portion 13a and the proximal end side portion 13b of the folded portion 13, respectively.
Specifically, as shown in FIGS. 5 to 8, the inclined portion 27 a formed on the distal end side portion 13 a takes into account the twisting force in the F1 direction applied to the distal end side portion 13 a, and the entire distal end side portion 13 a. As shown by θ1 in FIG. 6, it is formed by being bent obliquely in the direction of rising as it goes toward the tip of the tip side portion 13a. The inclined surface of the inclined portion 27a receives the twisting force in the F1 direction and is in contact with the edge of the end surface portion 18a (receiving portion 19a). That is, the distal end side portion 13a receives a twisting force in the F1 direction and is pressed from an oblique direction against the edge of the upper end surface portion 18a of the notch portion 17a. Thus, the distal end side portion 13a slides on the end surface portion 18a as indicated by an arrow a in FIG. 7 and displaces the central portion 13c until it abuts against the protrusion 23.

  The inclined portion 27b formed on the base end side portion 13b takes the F2 direction torsional force applied to the base end side portion 13b into consideration, and the entire base end side portion 13b is indicated by θ2 in FIG. In this case, it is formed by bending obliquely in the direction of rising as it goes toward the central portion 13c (inclination opposite to the inclined portion 25a). The inclined surface of the inclined portion 27b receives the twisting force in the F2 direction and is in contact with the edge of the end surface portion 18b (receiving portion 19b). That is, the base end side portion 13b receives a twisting force in the F2 direction and is pressed from the oblique direction against the edge of the lower end surface portion 18b of the notch portion 17b. As a result, the base end side portion 13b slides on the end face portion 18b as shown by an arrow b in FIG. 7 and displaces the central portion 13c until it hits the protrusion 23.

  The entire central portion 13c of the folded portion 13 has inclined portions 27a and 27b inclined in directions away from the central portion 13c, and end face portions 18a and 18b (receiving portions 19a) that receive the inclined portions 27a and 27b from opposite directions. 19b), the torsional forces F1 and F2 are utilized to always urge the projection 23 in the direction of abutment. By this urging, the central portion 13c of the folded-back portion 13 continues to abut against the front surface of the projection 23 (the contact portion 21) of the hinge base 6 as indicated by the arrow c in FIGS.

  As a result, the entire folded portion 13 is always restricted (constrained) by the twisting forces F1 and F2 to the initial fixed posture where it always abuts against the protrusion 23 of the hinge base 6 regardless of whether the trunk lid 3 is opened or closed. In other words, the entire turn-back portion 13 is maintained so as not to move from the posture when it comes into contact with the protrusion 23 of the hinge base 6 with the torsional forces F1 and F2, which is the initial posture.

  Thus, as shown in FIGS. 2 and 3, when the trunk lid 3 is opened and closed, the folded portions 13 of the torsion bars 7a and 7b are not in the initial posture in which they contact the protruding portion 23 of the original hinge base 6. It keeps constant without moving. That is, the folded-back portion 13 is prevented from shifting with respect to the end surface portions 18a and 18b (receiving portions 19a and 19b). Thereby, the folding | returning part 13 does not displace.

Therefore, when the trunk lid 3 is opened and closed, the behavior that the distal end side portion 13a and the proximal end side portion 13b are rubbed with the end face portions 18a and 18b (receiving portions 19a and 19b) of the notches 17a and 17b can be prevented. Generation of abnormal noise due to behavior can be prevented.
In particular, the folding portion 13 is regulated by using the torsional force of the torsion bar 7a (7b) and the inclined portions 27a and 27b inclined in directions away from the central portion 13c, and the end face portions 18a and 18b (receiving portions 19a and 19b). ) At an angle (in order to receive them from opposite directions), and the central portion 13c of the folded portion 13 abuts against the protrusion 25 (contact portion 21).

  In addition, since the inclined portions 27a and 27b are simply formed by bending the distal end side portion 13a and the proximal end side portion 13b of the folded portion 13 diagonally, a simple structure using existing members can be used. In addition, the inclined portions 27a and 27b obtained by bending the distal end side portion 13a and the proximal end side portion 13b not only press the central portion 13c of the folded portion 13 against the protruding portion 25 (contact portion 21) but also open / close the trunk lid 3. In this case, it can also play a role of dispersing concentrated stress.

  Note that the present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the spirit of the present invention. For example, in one embodiment, as an example of the inclined portion, the structure in which the distal end side portion and the proximal end side portion of the folded portion are inclined is described, but not limited to this, the distal end side portion and the proximal end side portion of the folded portion are provided. A structure in which an inclined member is separately provided may be used.

DESCRIPTION OF SYMBOLS 1 Car body 3 Trunk lid 5 Hinge 6 Hinge base 7a, 7b Torsion bar 11 Hinge arm 13 Folding part 13a Tip side part 13b Base end part 13c Center part 19a, 19b A pair of receiving part 25 Protrusion part (contact part)
27a, 27b Inclined part (biasing structure part)
F1, F2: Twisting force

Claims (3)

A pair of left and right hinges having a hinge base fixed to the vehicle body and a hinge arm pivotally connected to the hinge base to support the trunk lid so that the trunk lid can be opened and closed; one hinge base and the other side of the pair of hinges A trunk lid opening and closing structure having a torsion bar that is spanned between hinge arms and urges the trunk lid in the opening direction by a twisting force.
The torsion bar is formed by folding back an end portion on the hinge base side into a U shape, and includes a proximal end portion, a distal end portion folded from the proximal end portion, the proximal end portion, and the distal end side. A folded portion having a central portion located between the portions,
The hinge base is formed at a pair of receiving portions that receive the distal end side portion and the proximal end side portion from directions facing each other, and an abutting portion that can be in contact with the central portion and that can contact the central portion And
The trunk lid opening / closing structure, wherein the torsion bar is provided with a biasing structure portion that biases the central portion in a direction in which the center portion abuts the contact portion.   The biasing structure portion includes an inclined portion that is formed on the distal end side portion and the proximal end side portion so as to be inclined in a direction away from the central portion and is obliquely contacted with the receiving portion. The trunk lid opening and closing structure according to claim 1, wherein:   The trunk lid opening and closing structure according to claim 2, wherein the inclined portion is formed by bending the distal end side portion and the proximal end side portion obliquely.

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