JP2016088298A - Door hinge structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide door hinge structure which suppresses an excessive turn of a door even if the door receives an excessive load, and then, prohibits the turn.SOLUTION: A door hinge structure comprises: a first hinge member 9 fastened to a vehicle body 12; a second hinge member 8 fastened to a door D1, and pin-connected to the first hinge member; a turn suppression part b which absorbs a turning force of the door by the abutment of a first abutment part arranged at the second hinge member on a first stopper S1 arranged at the first hinge member at the opening of the door; and a turn prohibition part c which stops a larger turn to a door opening direction by the abutment of a second stopper S2 arranged at the second hinge member on a second abutment part 908 arranged at the first hinge member when the door is turned up to a limit opening P3 which is larger than a maximum opening P2.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a door hinge structure in which the rotation of a door is stopped by a rotation suppressing unit and a rotation blocking unit.

The door that opens and closes the vehicle entrance / exit is pivotally supported on the vehicle body side by upper and lower door hinges, and the other rotating end side is locked openably by a door lock mechanism. Here, the base end side of the door is pivotally supported on the vertical wall of the door opening periphery by the door hinge so as to be swingable, and the door opening degree is maintained at the maximum opening degree and an intermediate opening degree smaller than that by the door checker. Take.
The maximum opening of the door is set in consideration of the door checker working, getting on and off, and avoiding interference with other outer wall members such as a fender facing the peripheral edge of the door. However, in addition to the opening / closing operation force by the occupant, an excessive external force is applied to the door in the door opening direction as in the case of receiving a gust or the like, and the door checker may be damaged.

  Therefore, a door hinge is known that has a protrusion on the upper surface of the pivot arm on the vehicle body side and a rotation prevention function that restricts the limit opening of the door by abutting the swinging end of the pivot arm on the door side. (For example, see Patent Document 1)

JP 2003-127666 A

However, if an unexpected opening speed or load is applied due to a gust of wind or excessive opening / closing operation force, the protrusion on the upper surface of the pivot arm on the door side or the pivot arm on the vehicle body cannot withstand the load, and is deformed or damaged. However, the rotation prevention function does not work, and there is a possibility that the outer wall member such as a fender may be interfered and damaged.

  The present invention has been made in view of the above points, and provides a door hinge structure that prevents excessive rotation of the door even when the door is overloaded and prevents the rotation. For the purpose.

The door hinge structure according to the invention of claim 1 is:
A door hinge structure for a door that opens and closes an opening of a vehicle body,
A first hinge member fastened to the vehicle body side, a second hinge member fastened to the door side and rotatably connected to the first hinge member, the first hinge member and the second hinge member; And when the door is opened, when the door is rotated beyond a set maximum opening, the second hinge member is prevented from rotating in the door opening direction and the door is When the door is rotated to a limit opening larger than the maximum opening, the rotation suppressing unit that absorbs the rotational force, the first hinge member, and the second hinge member are provided. And a rotation preventing portion for preventing further rotation of the two hinge members in the opening direction of the door.

  According to a second aspect of the present invention, in the door hinge structure according to the first aspect, the first hinge member includes a vehicle body connecting plate portion fastened to the vehicle body side and a pair of protrusions protruding from the vehicle body connecting plate portion. The second hinge member includes a door connecting plate portion fastened to the door side and protrudes from the door connecting plate portion, and is rotatably connected to the pair of protruding pieces of the first hinge member. A pair of oscillating pieces, and the rotation suppressing portion is provided on one of the protruding piece or the oscillating piece and is formed to bulge to the other side of the protruding piece or the oscillating piece. A first contact that is provided on the other of the protruding piece and the swinging piece and is in sliding contact with the first stopper when the door is rotated beyond the maximum opening. And a portion.

  According to a third aspect of the present invention, in the door hinge structure according to the second aspect, the portion of the first stopper that is in sliding contact with the first contact portion is inclined so that the bulging amount gradually increases. A surface is formed.

  According to a fourth aspect of the present invention, in the door hinge structure according to the third aspect, the first contact portion is formed with an inclined portion in accordance with the inclination of the inclined surface of the first stopper. Features.

  According to a fifth aspect of the present invention, in the door hinge structure according to any one of the second to fourth aspects, the rotation blocking portion is a plate-like shape that connects between the protruding pieces or between the swinging pieces. A second stopper, and a second abutting portion that is provided on the protruding piece or the swinging piece and comes into contact with the second stopper when the door reaches the limit opening. Features.

In the present invention, the rotation restraining part absorbs the turning force of the door, and the rotation preventing part prevents the door from rotating so long as the rotation preventing part does not receive excessive force. The rotation can be stopped reliably.
The first abutting portion on the swing piece side contacts the first stopper of the pair of protruding pieces, and then the second stopper formed on the pair of swing pieces contacts the second contact portion on the pair of protruding pieces side. Thus, excessive rotation of the door exceeding the maximum opening can be stopped.
Since the first contact portion of the swinging piece comes into contact with the inclined surface of the first stopper and the contact between both surfaces proceeds in a sliding contact state, the rotational force can be absorbed smoothly.
Since the inclined portion of the first contact portion is formed in accordance with the inclination of the inclined surface of the first stopper, it is possible to form a rotation suppressing portion that can absorb the rotational force smoothly.
When an overload from the door is received, the plate-like second stopper that forms the rotation prevention portion and the second contact portion come into contact with each other, so that the rotation prevention portion is fully opened unless excessive force is received. The rotation of the door can be reliably stopped at a limit opening exceeding the degree.

It is a schematic plan view of the vehicle using the door hinge structure of one Embodiment of this invention. FIG. 2 is a cutaway side view of a main part near a front door of the vehicle shown in FIG. It is action | operation explanatory drawing of the lower door hinge employ | adopted with the front door of the vehicle shown in FIG. The lower door hinge employ | adopted with the front door shown in FIG. 2 is shown, (a) is a disassembled perspective view of a lower door hinge, (b) is a partially notched side sectional view in the GG line of (a), (c) ) Shows a top view of the lower door hinge. The door hinge structure of other embodiment which can be employ | adopted as the front door of the vehicle shown in FIG. 1 is shown, (a) is a disassembled perspective view, (b) is contact explanatory drawing of the stopper and door side hinge member at the time of a maximum opening degree. (C) is a partial notch side view in the HH line of (d), (d) shows the top view of a lower door hinge. The door hinge structure of other embodiment which can be employ | adopted as the front door of the vehicle shown in FIG. 1 is shown, (a) is the partial notch side view in the II line | wire of (c), (b) is the time of the maximum opening degree. The contact explanatory drawing of a stopper and a door side hinge member, (c) is an operation | movement explanatory drawing of a lower door hinge. FIG. 5B is a cross-sectional view taken along line B-B in FIG. 4C, illustrating the overload absorbing function of the lower door hinge.

FIG. 1 shows a door hinge 1 of Embodiment 1 which is an example of a door hinge structure according to the present invention.
The vehicle 2 equipped with the door hinge 1 includes front and rear doors D1 and D2 that open and close the deployed entrances m1 and m2 in the front-rear direction X. The front door D1 or the rear door D2 is opened and closed when an occupant gets on and off the front and rear seats 5 and 6 in the passenger compartment 4. A door hinge 1 (only the door hinge 1 for the front door D1 is shown in FIG. 1) is attached to each of the doors D1 and D2. Thereby, the maximum opening P2 from the closed position P1, the intermediate opening not shown, or the limit opening P3 larger than the maximum opening P2 is allowed to rotate.
As shown in FIG. 2, the front door D1 has an upper door hinge 1u having a hinge function part a that can swing around the swing center line Lc as a door hinge 1, and a rotating function in addition to the hinge function part a. A lower door hinge 1d having a movement suppression part b and a rotation suppression prevention part c (see FIG. 3) is attached. Of the upper door hinge 1u and the lower door hinge 1d, the lower door hinge 1d of the front left front door D1 having the hinge function part a, the rotation suppressing part b, and the rotation preventing part c will be described below.

The lower door hinge 1d employs a configuration in which a first hinge member fastened to the vehicle body side, a second hinge member fastened to the door side, and the first hinge member and the second hinge member are rotatably connected.
Specifically, as shown in FIG. 3 or FIG. 4, the lower door hinge 1d includes a vehicle body side hinge 9 that forms a first hinge member that is fixed to the front pillar 12 that is a part of the vehicle body, and a front door D1. And a door-side hinge 8 forming a second hinge member fixed to the door. Further, the lower door hinge 1d includes a hinge pin 10 that rotatably connects the vehicle body side hinge 9 and the door side hinge 8 to each other.
The vehicle body side hinge 9 is formed with a first stopper S1 and a second contact portion 908, which will be described later, and the door side hinge 8 has a first contact portion 806 that contacts the first stopper S1, and a second contact portion 908. A second stopper S2 to be in contact is formed.

As shown in FIG. 4 (b), the vehicle body side hinge 9 has a vehicle body connection plate portion 901 overlapped with an outer vertical wall 121 extending in the vertical direction Z of the front pillar 12, and the vehicle body connection plate is connected with a bolt (not shown). The part 901 is fastened to the front pillar 12.
The vehicle body connecting plate portion 901 has upper and lower reinforcing flanges 902 and 903 that are continuously projected from the upper and lower edge portions in the vehicle width direction Y of the vehicle. On the upper and lower reinforcing flanges 902 and 903, on the rear side in the longitudinal direction X of the vehicle, vertically projecting pieces 904 and 905 are formed so as to further protrude in the vehicle width direction Y. The vertically projecting pieces 904 and 905 are formed in a lateral U-shape as shown in FIG.

4A, after the door-side hinge 8 and the vehicle body-side hinge 9 are disassembled, a pair of protruding pieces 904 and 905 are arranged obliquely left and right in FIG. 4A, and the protruding pieces 904 and 905 are arranged. The longitudinal direction is shown in the vehicle width direction Y (upward in FIG. 4A).
The pair of projecting pieces 904 and 905 are intermediate portions in the longitudinal direction, and a first stopper S1 is formed on the rear side in the front-rear direction X, and a pivot hole n1 that is a pin hole is formed on the projecting end side. It is formed. Further, the pair of protruding pieces 904 and 905 is formed with a second contact portion 908 on the base end side in the longitudinal direction on the opposite side (front-rear direction X front side) from the first stopper S1.

In FIG. 4B, in the vertical direction Z, the first stopper S1 of the upper protruding piece 904 is bulged upward, and the first stopper S1 of the lower protruding piece 905 is bulged downward. That is, both the first stoppers S1 bulge toward both swinging regions (only the upper two-dot chain line E1 is shown in FIG. 4C) of swinging pieces 803 and 804, which will be described later, of the door side hinge 8. As shown in FIG.
Each first stopper S1 abuts on each first abutting portion 806 of swinging pieces 803 and 804, which will be described later, and slides with each other to form a rotation restraining portion b that absorbs the rotational force of the front door D1. .

Next, the door side hinge 8 that is the swing side of the lower door hinge 1d will be described.
As shown in FIG. 4B, the door-side hinge 8 has door connection plate portions 801 and 802 arranged in the vertical direction Z on the door-side vertical wall 111 of the front inner panel 11 of the front door D1. The door connecting plate portions 801 and 802 are fastened to the door-side vertical wall 111 with bolts (not shown).
The upper and lower door connecting plate portions 801 and 802 are provided with swinging pieces 803 and 804 that are bent to extend forward in the front-rear direction X, respectively. The pair of upper and lower swinging pieces 803 and 804 are inserted through a pivot pin 10 (see FIG. 4B) extending in the vertical direction Z into a pivot hole n2 (see FIG. 4A) provided in an intermediate portion thereof, and protrudes. It is pivotally supported on the pieces 904 and 905 side.
The swinging ends of the swing pieces 803 and 804 on the front side in the front-rear direction X (the front side in FIG. 4B) are integrally coupled to each other by a plate-like second stopper S2. The second stopper S2 is on the upper and lower protruding pieces 904 and 905 of the vehicle body side hinge 9 so as to be able to contact the front second contact portion 908 (refer to FIG. 4A) in the front-rear direction X. Is formed.
Such a door-side hinge 8 has a substantially hat-like shape in the horizontal direction as shown in FIG. 4B, and is fastened to the front door D1 and then pin-coupled to the vehicle-body-side hinge 9.

  As shown in FIG. 4B, the relative distance L1 between the upper and lower sliding pieces 803 and 804 of the door-side hinge 8 is formed larger than the outer surface distance L2 of the upper and lower protruding pieces 904 and 905 of the vehicle body-side hinge 9. . These upper and lower swinging pieces 803 and 804 are arranged so as to sandwich the upper and lower protruding pieces 904 and 905 from above and below, and are pin-coupled with the hinge pins 10 inserted into the respective pivotal support holes n1 and n2 so as not to be separated, A hinge function part a is formed.

The rotation restraining part b is formed by the vehicle body side hinge 9 and the door side hinge 8.
Specifically, when the front door D1 is opened, when the front door D1 is opened, the function as the rotation suppressing unit b is the first hinge provided on the door-side hinge 8 that is the second hinge member. The contact portion 806 is in contact with the first stopper S1 provided on the vehicle body side hinge 9 that is the first hinge member, thereby suppressing the rotation in the door opening direction. In other words, the function of absorbing the rotational force of the door can be realized.
FIG. 7 (corresponding to the BB cross section in FIG. 4C) shows a partial cross section of the rotation suppressing portion b formed by the upper protruding piece 904.
As shown in FIG. 7, the first stopper S <b> 1 formed on the protruding piece 904 is formed so as to protrude to the swinging region E <b> 1 of the opposed swing piece 803. The first stopper S1 is formed with an inclined surface fs1 that is inclined so that the amount of bulging gradually increases at a portion in sliding contact with the first contact portion 806.
The first contact portion 806, which is the edge on the swing piece 803 side facing the inclined surface fs1, also has the inclined surface fs2. Here, an inclined portion fs2 of the swing piece 803 that is opposed to the inclined surface fs1 of the first stopper S1 is formed.

The first stopper S1 and the first contact portion 806 relieve the impact when the front door D1 rotates due to an overload and the first contact portion 806 contacts the first stopper S1. Moreover, when the first stopper S1 and the first contact portion 806 are in sliding contact with each other and relative deformation occurs, the swinging pieces 803 and 804 are smoothly displaced over the first stopper S1.
Note that the rotation suppression portion b formed by the first stopper S1 on the lower protruding piece 905 side and the first contact portion 806 on the swinging piece 804 side also functions in the same manner.
When the front door D1 exceeds the fully open position P2 and the first contact portion 806 of the swinging pieces 803 and 804 gets over the first stopper S1, the second stopper S2 of the swinging pieces 803 and 804 becomes the rotation preventing portion c. Reach.

As shown in FIG. 4 (b), the second stopper S2, which forms the main part of the rotation preventing portion c, connects the swinging ends of the pair of swinging pieces 803 and 804 of the door-side hinge 8 that is the second hinge member. It is formed as a plate-shaped piece. The second stopper S2 is formed so as to be able to contact a second contact portion 908 formed at a front portion in the front-rear direction X of the upper and lower protruding pieces 904 and 905 of the vehicle body side hinge 9 which is the first hinge member. .
The rotation prevention part c is formed by the second contact part 908 (see FIG. 4A) of the protruding pieces 904 and 905 of the vehicle body side hinge 9 and the second stopper S2. When the door-side hinge 8 gets over the rotation suppressing portion b and further rotates to reach the limit opening P3, the second stopper S2 provided on the door-side hinge 8 that is the second hinge member is the vehicle body-side hinge 9. The second abutting portion 908 abuts on the front door D1 and functions to stop further rotation in the opening direction of the front door D1.

When the front door D1 shown in FIG. 1 is opened from the closed position P1 by the unlocking operation of the door lock mechanism 7 (see FIG. 2) during normal times such as when there is no wind, the rotation restraining part b and the rotation preventing part c. The behavior of will be described.
As shown in FIG. 3, when the front door D1 is opened from the closed position P1, the door checker 40 installed in the front door D1 first moves the front door D1, first, the intermediate opening restriction portion q1, and then The maximum opening degree restricting part q2 works to restrict the position. At this time, the shift of the front door D1 in the opening direction from the maximum opening restriction portion q2 is prevented by the end stopper 401 of the door checker 40 hitting the back side of the door side sliding receiving portion 402.

On the other hand, it is assumed that the front door D1 in an open state receives an overload due to a gust of wind, the front door D1 is further opened from the fully open position P2, the door checker 40 is deformed, and excessive rotational displacement starts.
At this time, as shown in FIGS. 4B and 4C, the rotation restraining portion b is activated by the first abutting portions 806 of the upper and lower rocking pieces 803 and 804 coming into contact with the first stopper S1.
At this time, as shown in FIG. 7, since the inclined surface fs2 of the swing piece 803 contacts the inclined surface fs1 of the first stopper S1, it is possible to mitigate the impact when both surfaces contact. In addition, since the contact on both surfaces proceeds in a sliding state, the swinging pieces 803 and 804 ride on the first stopper S1 due to elastic deformation, and the rotational force is smoothly absorbed.

  After the rotation suppression part b absorbs a part of the excessive turning force of the front door D1, the front door D1 whose turning force is weakened further reaches the limit opening P3 indicated by a two-dot chain line in FIG. There is. When the front door D1 reaches the limit opening P3, the two swinging pieces 803, the second abutting portion 908 (see FIGS. 4A and 4B) which is a part of the upper and lower protruding pieces 904, 905, The second stopper S2 that integrally connects 804 contacts.

  At this time, the overload from the front door D1 is weakened in advance by the rotation suppressing portion b and then distributed and applied to the upper and lower second abutting portions 908 from the second stopper S2. For this reason, the rotation prevention part c works with durability, and the front door D1 can be reliably stopped at the limit opening P3 within the normally assumed overload range. That is, the rotation suppressing part b and the rotation preventing part c sequentially cooperate to absorb a part of the rotational force of the front door D1, weaken excessive impact, and stop the front door D1 at the limit opening P3. Can do. For this reason, unless the rotation prevention part c receives excessive force, it can function so that the further rotation to the opening direction of the front door D1 may be stopped.

In the lower hinge 1d according to the first embodiment, the pair of protruding pieces 904 and 905 of the vehicle body side hinge 9 are sandwiched from above and below by the swinging pieces 803 and 804 of the door side hinge 8, and are pivotally attached to each other. On the other hand, the lower door hinge 1da according to the second embodiment in which the arrangement of the protruding pieces 904 and 905 and the sliding pieces 803 and 804 is changed will be described below. In addition, in order to abbreviate | omit duplication description, only the code | symbol is attached | subjected about the structure similar to the lower door hinge 1d.
As shown in FIG. 5C, the lower hinge 1da extends from the front door D1 to the upper surfaces of the pair of protruding pieces 904a and 905a of the vehicle body side hinge 9a as the first hinge member extending from the front pillar 12 side. The structure which piled up the lower surface of the sliding pieces 803a and 804a is taken.

  In the lower hinge 1da shown in FIGS. 5A to 5D, the swinging pieces 803a and 804a of the door-side hinge 8 overlap the upper surfaces of the protruding pieces 904a and 905a of the vehicle body-side hinge 9a, respectively. Here, on each upper surface (see FIG. 5C) of the vehicle body side hinge 9a, the swinging area E2 of the swinging side swinging pieces 803a and 804a (only the swinging piece 803a side is shown in FIG. 5D). Is provided. For this reason, the hinge function part a on which the swinging pieces 803a and 804a swing can be formed on the upper surfaces of the protruding pieces 904a and 905a on the fixed side, and can be pivotally supported while receiving the load of the front door D1 with high durability.

As shown in FIG. 5C, the first stopper S1a at the side edge of the upper protruding piece 904a and the first stopper S1a at the side edge of the lower protruding piece 905a are both upward, that is, swinging. The strips 803a and 804a are formed so as to bulge into the swinging region E2. Since the first abutting portions 806a on the side of the sliding pieces 803a and 804a are in contact with the first stoppers S1a, the first stoppers S1a and the first abutting portions 806a block the turning force of the front door D1. The rotation suppression part b which forms is formed.
As shown in FIGS. 5 (a) and 5 (c), the swinging end sides of both swinging pieces 803a and 804a are connected by a plate-like second stopper S2a. The second stopper S2a abuts only on the second abutting portion 908a formed on the opposite side edge portion of the upper protruding piece 904a (the front side in FIG. 5C). The second stopper S2a and the second contact portion 908a constitute a rotation preventing portion c that stops the front door D1 at the limit opening P3.

Next, the operation of the lower hinge 1da of the second embodiment will be described.
In a vehicle using the lower hinge 1da, the front door D1 is opened from the closed position P1 by the unlocking operation of the door lock mechanism 7 (see FIG. 2) during normal operation such as when there is no wind. The front door D1 that opens is subjected to a force that is regulated at each position by the intermediate opening degree restricting portion q1 and the maximum opening degree restricting portion q2 of the door checker 40. At this time, the shift of the front door D1 in the opening direction from the maximum opening restriction portion q2 is prevented by the end stopper 401 of the door checker 40 hitting the back side of the door side sliding receiving portion 402.

On the other hand, it is assumed that the front door D1 in an open state receives an overload due to a gust of wind, the front door D1 is further opened from the fully open position P2, the door checker 40 is deformed, and excessive rotational displacement starts.
At this time, as shown in FIGS. 5B and 5C, the first abutting portions 806a of the upper and lower swinging pieces 803a and 804a are brought into contact with the first stopper S1 bulging toward the swinging piece side, so that The movement suppression part b functions and the excessive turning power of the front door D1 is absorbed. The shock absorbing function of the rotation suppressing portion b is similar to that described with reference to FIG. 7 in the description of the first embodiment, and the swing piece 803a is provided on the inclined surface fs1 (see FIG. 7) of the first stopper S1a. Since the inclined surface fs2 (see FIG. 7) contacts, the impact when both surfaces contact can be alleviated. In addition, since the contact on both sides proceeds in a sliding state, the swinging pieces 803a and 804a ride on the first stopper S1a due to elastic deformation, and the rotation is absorbed smoothly.

After the rotation restraining part b absorbs a part of the excessive turning force of the front door D1, the front door D1 whose turning force is weakened further has a limit opening P3 indicated by a two-dot chain line in FIG. To reach. When the limit opening P3 shown in FIG. 5D is reached, the second stopper S2a comes into contact with the second contact portion 908a (see FIGS. 5A and 5C) of the upper protruding piece 904a and rotates. Acts as a blocking part c.
When the rotation prevention part c works, the front door D1 can be stopped at the limit opening P3 in the normally assumed overload range. That is, the rotation suppressing part b and the rotation preventing part c sequentially cooperate to absorb a part of the rotational force of the front door D1, and after stopping the excessive impact, the front door D1 is stopped at the limit opening P3. be able to.

Next, the lower hinge 1db of the third embodiment that can be employed instead of the door hinge of the first embodiment will be described.
In the lower hinge 1d of the first embodiment described above, when the front door D1 reaches the limit opening P3, the second stopper S2 comes into contact with the second contact portions 908 of the protruding pieces 904 and 905, and the front door D1 is moved. It stopped at the limit opening P3. The door hinge of Embodiment 3 which has another rotation prevention part c instead of the structure of the rotation prevention part c which stops rotation of the front door D1 because 2nd stopper S2 contact | abuts to each protrusion piece 904,905. The lower door hinge 1db will be described next.
In addition, in order to abbreviate | omit duplication description, only the code | symbol is attached | subjected about the structure similar to the lower door hinge 1d.

As shown in FIG. 6A, in the lower door hinge 1db, a pair of protruding pieces 904b and 905b of the vehicle body side hinge 9b are disposed so as to sandwich the swinging pieces 803b and 804b of the door side hinge 8b from above and below. . The pair of projecting pieces 904b and 905b and the pair of swinging pieces 803b and 804b sandwiched between the projecting pieces 904b and 905b are pivoted so as to be relatively rotatable by hinge pins 10 inserted into the pivotal support holes n1 and n2, respectively. Worn.
As shown in FIG. 6 (a), swinging areas E3 of the swinging pieces 803b and 804b of the door side hinge 8b are arranged opposite to each other on the side surfaces of the side edges of the pair of protruding pieces 904b and 905b facing each other. . The first stoppers S1b protrude upward and downward from the side edges of the pair of protruding pieces 904b and 905b toward the swinging area E3.

Since the first contact portions 806b of the sliding pieces 803b and 804b are in contact with the first stoppers S1b, the first stoppers S1b and the first contact portions 806b absorb the rotational force of the front door D1. A rotation suppressing part b is formed.
A pair of protruding pieces 904b and 905b are fixed with the left end portion in FIG. 6 (a) having the up-down direction Z as the longitudinal direction and the left-right direction (the same as the vehicle width direction Y) in FIG. 6 (a) as the short direction. A plate-like second contact portion 908b is formed.
The pair of upper and lower rocking pieces 803b and 804b are pivotally supported on the projecting pieces 904b and 905b side by inserting the pivot pin 10 into pivot support holes n1 and n2 provided in the middle part thereof.

The door-side hinge 8 includes door connecting plate portions 801b and 802b that are formed by bending in the vertical direction Z from the right ends of the pair of sliding pieces 803b and 804b in FIG. The door connecting plate portions 801b and 802b are fastened to the door-side vertical wall 111 with bolts (not shown).
The swinging ends of the pair of swing pieces 803b and 804b are integrally coupled by the second stopper S2b. The second stopper S2b has a protruding portion S2b1 bent at the center thereof. The protruding part S2b1 forms the main part of the second stopper S2b.

Assume that the front door D1 including the lower door hinge 1db receives a gust of wind or the like at the maximum opening P2, the door checker 40 is deformed, and excessive rotational displacement is started.
At this time, the first contact portions 806b of the sliding pieces 803b and 804b of the door-side hinge 8b are in contact with the first stoppers S1b of the upper and lower protruding pieces 904b and 905b. Here, as shown in FIGS. 6A and 6B, the rotation restraining portion b functions by the first abutting portions 806b of the upper and lower swinging pieces 803b and 804b coming into contact with the first stopper S1b. The excessive turning power of the front door D1 is absorbed. The shock absorbing function of the rotation suppressing portion b is the same as that described with reference to FIG. 7 in the description of the first embodiment, and the swing piece 803b is provided on the inclined surface fs1 (see FIG. 7) of the first stopper S1b. The slanted surface / both-side contact proceeds in a sliding contact state. For this reason, the rocking pieces 803b and 804b ride on the first stopper S1a by elastic deformation, and the rotational force is smoothly absorbed.

  Next, each first contact portion 806b gets over the first stopper S1b, and the front door D1 rotates toward the limit opening P3. Then, the protruding portion S2b1 constituting the main part of the second stopper S2b provided on the door side hinge (second hinge member) 8b comes into contact with the fixed plate-like second contact portion 908b. As a result, the front door D1 is stopped at the limit opening P3, and further rotation can be reliably stopped in the normally assumed overload range.

The lower door hinges 1d, 1da, and 1db of the first to third embodiments are configured such that when the front door D1 receives an overload and operates to open beyond the maximum opening degree, the rotation suppression unit b supplies the rotational force of the front door D1. Absorbing, the rotation prevention part c prevents excessive rotation of the front door D1. As a result, even if the front door D1 receives a gust of wind or the like in a normally assumed overload range, the front door D1 rotates excessively, interferes with the vehicle body outer plate in the vicinity of the front door D1, and is damaged. Can be reliably prevented.
The second stoppers S2, S2a, S2b of the door side hinges 8, 8a, 8b which are the second hinge members of the first to third embodiments are the vehicle body side hinges 9, 9a, which are the first hinge members when the front door D1 is opened. It contacts the second contact portions 908, 908a and 908b of 9b. With this configuration, in Embodiments 1 to 3, excessive rotation of the front door D1 exceeding the maximum opening can be prevented or suppressed.

The second stopper S2b according to the third embodiment abuts on a second abutting portion 908b that forms a fixed plate integrally connecting a pair of protruding pieces 904b and 905b. Excessive rotation of the front door D1 exceeding the maximum opening degree can be prevented or suppressed by applying an overload from the front door D1 to the second contact portion 908b that forms the fixed plate from the second stopper S2b.
In the lower hinge 1d of the first embodiment, the second stopper S2 is provided between the swinging pieces 803 and 804 of the door-side hinge 8, and the second abutting portion 908 that abuts on the second stopper S2 is disposed on the vehicle body side. The protrusions 904 and 905 of the hinge 9 are provided. Instead of such a configuration, a configuration may be adopted in which the second contact portion is provided on the door side hinge and the second stopper is provided on the vehicle body side hinge. In such a case, substantially the same effect as that of the first embodiment can be obtained.

As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to this specific embodiment, Unless it is specifically limited by the above-mentioned description, this invention described in the claim is described. Various modifications and changes are possible within the scope of the gist of the invention.
For example, although the lower hinges 1d to 1db have been described as being used on the lower side of the front door as the door hinge structure to which the present invention is applied, they may be used for the upper hinge. Furthermore, it may be a door at another position of the vehicle, and can also be adopted as a door that opens and closes the entrance of a structure other than the vehicle.
The effects described in the embodiments of the present invention only list the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention. Absent.

DESCRIPTION OF SYMBOLS 1 Door hinge structure 1d, 1da, 1db Lower door hinge 8 2nd hinge member 801, 802 Door connection board part 803, 804 Swing piece 806, 806a, 806b 1st contact part (a part of 2nd hinge member)
9 First hinge member 901 Car body connecting plate portion 904, 905 Projecting piece 908, 908a, 908b Second contact portion (part of first hinge member)
10 Hinge Pin 11 Front Inner Panel 111 Door Side Vertical Wall 12 Car Body (Front Pillar)
121 Car body side vertical wall a Hinge function part b Rotation suppression part c Rotation prevention part fs1, fs2 Inclined surface D1 Door Lc Oscillation center line P2 Maximum opening P3 Limit opening S1, S1a, S1b First stopper (first Part of the hinge member)
S2, S2a, S2b Second stopper (the other part of the second hinge member)

Claims (5)

A door hinge structure for a door that opens and closes an opening of a vehicle body,
A first hinge member fastened to the vehicle body side;
A second hinge member fastened to the door side and rotatably connected to the first hinge member;
The door of the second hinge member is provided between the first hinge member and the second hinge member, and when the door is opened, when the door is rotated beyond a set maximum opening, the door is opened. A rotation suppression unit that suppresses rotation in the opening direction and absorbs the rotational force of the door;
When the door is pivoted to a limit opening larger than the maximum opening, the second hinge member extends in the opening direction of the door. The door is provided between the first hinge member and the second hinge member. A door hinge structure for a vehicle, comprising: a rotation preventing portion for preventing further rotation. The door hinge structure according to claim 1,
The first hinge member has a vehicle body connecting plate portion fastened to the vehicle body side wall and a pair of protruding pieces protruding from the vehicle body connecting plate portion,
The second hinge member is a door connecting plate portion fastened to the door side, and protrudes from the door connecting plate portion, and a pair of swinging members rotatably connected to the pair of protruding pieces of the first hinge member. Have moving pieces,
The rotation suppressing portion is provided on one of the protruding piece or the swing piece, and a first stopper formed to bulge to the other side of the protruding piece or the swing piece;
A first abutting portion provided on the other of the protruding piece or the swinging piece and having a sliding contact with the first stopper when the door is rotated beyond the maximum opening degree. And door hinge structure. The door hinge structure according to claim 2,
A door hinge structure characterized in that an inclined surface that is inclined so as to gradually increase a bulge amount is formed at a portion of the first stopper that is in sliding contact with the first contact portion. The door hinge structure according to claim 3,
The door hinge structure according to claim 1, wherein an inclined portion is formed on the first abutting portion in accordance with an inclination of the inclined surface of the first stopper. In the door hinge structure according to any one of claims 2 to 4,
The rotation preventing portion is provided on the plate-like second stopper that connects between the protruding pieces or between the swinging pieces, and the protruding piece or the swinging piece, and the door is at the limit opening. A door hinge structure comprising: a second abutting portion that abuts against the second stopper when the second stopper is reached.

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