JP2019085781A - Vehicle door open/close assist mechanism and assist method thereof - Google Patents

Abstract

To provide a downsizing technology allowing an assist mechanism assisting door open/close operation to be easily installed even in a limited space within a door body.SOLUTION: A door open/close assist mechanism comprises: a first assist mechanism 1 at a door hinge side; and a second assist mechanism 2 in a door body D. The door open/close assist mechanism reduces loads applied on both of the first and second assist mechanisms using a resultant assist force produced by both of the first and second assist mechanisms so as to allow downsizing. The first assist mechanism 1 may use a reaction force of a torsion spring 15 coaxially arranged with a door hinge pin 8, and the second assist mechanism 2 may use a reaction force produced by tension or compression of a coil spring 25 door at closing action. In this embodiment, the coil spring 25 of the second assist mechanism 2 may be coaxially arranged with a check bar 22 of a door check mechanism 20 fixed on the door body D to cause the reaction force of the coil spring 25 to be applied on a door checker 21 slidably moving around the circumference of the check bar 22 in response to door open/close movement.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a door opening and closing operation assist mechanism for assisting an operation force when opening and closing a vehicle door, and a door opening and closing operation assist method. More specifically, when the mounting position of the vehicle door is low, etc., a vehicle having a structure that opens the door in the direction to lift the door to avoid damage when the lower end of the door is in contact with a curb or the like when the vehicle door is opened. The present invention relates to a door opening / closing operation assist mechanism used to reduce the door opening / closing operation force that is increased by such a structure, and to a door opening / closing operation assist method.

  As the opening and closing structure of the vehicle door, the door is pivoted in a substantially horizontal direction with the hinge having an axis extending in the vertical direction as a fulcrum, the door is moved in the longitudinal direction and the slide is opened or closed. It is known that the door is flipped up and opened about a hinge having an axis extending in the direction. In this specification, the front and back of the traveling direction of the vehicle is "front and back", the direction orthogonal to the traveling direction in the horizontal plane is "lateral", and of the lateral directions, the right side toward the traveling direction is " The right direction is referred to as “left direction”, and the direction orthogonal to the ground is referred to as “vertical direction”.

  Of each type of vehicle door, the mounting structure of the vehicle door in the prior art of the type in which the hinge axis extends in the vertical direction and thus the vehicle door opens and closes in the horizontal direction will be described with reference to the drawings. (See, for example, Patent Document 1). FIG. 4 shows the assembly structure of the vehicle door disclosed in Patent Document 1, where B indicates a vehicle body and D indicates a door body. The door body D is openably attached to and supported by the vehicle body B by a pair of hinges H. The hinge H shows a generally widely used structure in which a vehicle body side hinge arm and a door body side hinge arm are combined and a hinge pin passes through both.

  In the middle of the pair of hinges H, a door check mechanism C for restraining the vehicle door at a predetermined opening position during opening and closing is provided. In the door check mechanism C, one end of a check bar indicated by reference numeral 6 is pivotably attached to the vehicle body B by a hinge pin 8, and the other end as a remote end penetrates the opening 3 of the door body D. It is inserted into the door body D. Due to the misalignment between the axis of the door hinge H which is the rotation center of the door body D and the hinge pin 8 which is the rotation center of the door check mechanism C, part of the check bar 6 moves in and out of the door body D according to the opening and closing operation of the vehicle door It is configured to

  FIG. 5 is a sectional view showing the structure inside the door body D of the door check mechanism C shown in FIG. A check bar 6 pivotally attached at one end by a hinge pin 8 penetrates a door checker bolted to the back of the door body D, and a pair of shoes indicated by reference numeral 19a backed up by a cushioning material inside the door checker The slider is pressed from above and below, and its free relative movement is suppressed. When the vehicle door is opened, a part of the check bar 6 is pulled out of the door body D due to the relative movement of the vehicle body B and the door body D and moves relative to the left direction in the drawing The vehicle door stops at the fully open position when it strikes the checker's case. In the meantime, the pair of shoes 19a are fitted in the grooved grooves 9a and 9b provided on the surface of the check bar 6 to restrain the relative movement of the check bar 6, and the vehicle door is maintained in the half-opened state at that position. When it is desired to further open and close the vehicle door from that position, the operation force is applied to the vehicle door, and the shoe 19a rides on the edge of the recessed groove 9a, 9b, and the restraint is released.

As shown in FIG. 4, in the case of a door mounting structure in which the hinge axis extends substantially in the vertical direction and the vehicle door turns in a substantially horizontal direction and opens and closes, the lower end of the door body in a car having a low height such as a sports car. If the vehicle door is opened horizontally to the side so as to be low, there is a risk that the lower end of the vehicle door will come into contact with curbs on the road and be damaged. In the prior art, in order to avoid such a situation, the hinge axis of the vehicle door is inclined upward and inward in the lateral direction of the vehicle, and the lower end is lifted by opening the vehicle door about this inclined axis. It is done to secure the height distance between. If the inclination angle at this time is too large, the load for lifting increases, and if it is too small, the inclination angle of about 10 ° ± 5 ° with respect to the vertical direction is preferable because the lifting effect is small. Further, the same inclination of the hinge axis may be used to avoid interference between both doors when the front and rear doors of the double door arrangement are arranged (see, for example, Patent Document 2 and Patent Document 3).

  Although there is no particular problem if the hinge axis is inclined by only a few degrees due to the design etc., if the inclination angle is increased as mentioned above, the vehicle door is lifted by the turning when the door is opened, so that Because of the weight load, a greater operating force is required by the door opening and closing, and the opening and closing comfort is lost. In particular, in the door body of recent vehicles, in addition to conventionally known elements such as door glass, glass run channel, window regulator, door opening / closing mechanism, power for power window and its wiring, indoor speaker and its wiring, power As the door mirror and its control device and wiring, impact bar, etc. are added, the total weight exceeds 30 kg. For this reason, some operation force assist mechanism is required as a further measure to eliminate such deterioration in operability.

  In the prior art, as a general vehicle door opening / closing operation assist mechanism, a gas-filled damper is widely used particularly around the back door, and an example is also applied to a vehicle door that opens and closes it in the horizontal direction. See, for example, US Pat. However, such measures have had problems such as large-scale, heavy weight, and disadvantageous in cost. The gas-filled damper also has a residual pressure due to residual gas pressure even when it is extended to the maximum, so there is no problem if it is an application that always supports a load like a backdoor, but the application of a normal horizontal opening door However, there is also a problem that an extra operation force is required in the initial operation at the time of closing.

  As another simple assist mechanism, a coil spring may be provided in the door body D, and the relative movement of the check bar may be used to utilize the tensile force or the compressive force of the coil spring as the assist force. However, in order to obtain an assist force that is effective enough to lift the heavy vehicle door as described above, the size of the spring itself must be relatively large, and a strong mechanism for holding the spring is required. There are space restrictions in putting it in the door body.

  In order to solve such a problem, Patent Document 2 discloses a technique of using a torsion bar as a substitute for a gas-filled damper and assisting a door opening / closing operation force by using a reaction force by torsion of the torsion bar. There is. FIG. 6 shows an outline of the torsion bar type assist mechanism disclosed in Patent Document 2, and the figure shows the end face of the door body attachment portion as viewed from the vehicle body side. In the same figure, a long torsion bar indicated by reference numeral 30 is vertically disposed along the end face of the door body in order to secure a sufficient assist force, and the upper end thereof is an upper door hinge on the door body side (reference numeral 18 in the figure) The lower end is fixed to a dedicated fixing member (reference numeral 31) provided at the lower portion of the pillar on the vehicle body side. With this structure, torsion is generated in the torsion bar in response to the opening and closing of the door, and the reaction force generated thereby is used as the assist force.

  Among the reference numerals shown in FIG. 4 to FIG. 6, the other reference numerals except for the reference numerals used in the above explanation and the explanation to be described later with reference to FIG. It is only as added, and not consistent with the reference numerals shown in FIGS. 1 to 3 used in the description of the present invention described later.

JP 2004-190431 A JP, 2017-144959, A Unexamined-Japanese-Patent No. 2004-155276 JP, 2009-202852, A JP, 2017-144958, A

  However, there is still room for improvement in the prior art solutions described above. The greatest problem in providing the torsion bar is that it is necessary to secure a space for housing the long torsion bar in a narrow gap between the vehicle body (pillar) and the door body. For this reason, normally, as shown in FIG. 4, the door hinge H provided with a pair in the vertical direction of each door is only one as shown in FIG. 6 in Patent Document 2, and this one is moved upward as much as possible. Thus, the space required for the torsion bar is secured in the vertical direction. When this is compared with a conventional door hinge arranged in a pair in the vertical direction, the support point of the door deviates upward from the center of gravity of the door, and since it is in a cantilever state, there arises a problem that the door support force becomes unstable. . In particular, in order to cope with an impact at the time of a collision to the side of the door with only one hinge located at the upper part of the door, the door hinge itself should be structurally and structurally robust to obtain an appropriate reaction force. In addition, there is a problem that special measures are required for attachment and adjustment of the torsion bar as well (see, for example, Patent Document 5).

  As described above, the present invention solves these problems found in gas-filled dampers, torsion bars, large-sized springs, etc., and has a simple structure and a compact vehicle door opening / closing operation assist structure that is reasonable even if it is small. The purpose is to provide an assist method.

  According to the present invention, the door opening / closing assist mechanism is provided not only on the door body side or the door hinge side but also on both sides to disperse the assist force to both sides, and utilizing the combined assist force by this both assist mechanism In particular, by providing an assist mechanism capable of downsizing the assist mechanism provided on the side of the door body and exhibiting sufficient assist power even in a limited space, the problems in the above-described prior art can be solved. Specifically, the following contents are included.

  That is, one aspect according to the present invention is a door opening / closing operation assist mechanism that assists the operation force at the time of opening / closing operation of the vehicle door, and a first assist mechanism is provided on the door hinge side to reduce the operation force. The present invention relates to a door open / close operation assist mechanism provided with a second assist mechanism for reducing the operation force on the side, and distributing the assist force necessary for the door open / close operation to both the first and second assist mechanisms. .

  The first assist mechanism is provided coaxially with the door hinge pin and configured to utilize a reaction force of a torsion spring which is twisted by the door closing operation, and the second assist mechanism is pulled or not by the door closing operation. It can be configured to use the reaction force of a coil spring disposed in the door body to be compressed.

  At this time, the coil spring may be a coil spring disposed on an outer periphery of a check bar of a door check mechanism which maintains the door at a predetermined opening position when the door is opened and closed. The check bar may be formed in a straight line and fixed on the door body side, and a door checker may slide on the outer periphery of the check bar via a link arm that rotates in accordance with the door opening / closing operation.

  The assist force combined by the first assist mechanism and the second assist mechanism acts in the opening direction of the vehicle door between the door closing position and the front of the door full opening position, and the door full opening position from the front of the door full opening position Until then, the vehicle door can be configured to act in the closing direction.

  Another aspect according to the present invention is a door opening / closing operation assisting method for assisting operation force when opening / closing operation of a vehicle door, wherein the assisting force necessary for the door opening / closing operation is divided into the door hinge side and the door body side. The present invention relates to a door opening / closing operation assisting method characterized by reducing the load on both the assist mechanisms and reducing the size thereof by dispersing them in the assist mechanisms provided to reduce the operating force.

  It is possible to miniaturize both assist mechanisms, in particular the assist mechanism on the door body side, by implementing the present invention in which the door opening / closing operation assist mechanism is dispersedly arranged on both the door hinge side and the door body side and the combined assist force of both is implemented. It becomes possible to achieve the technical effect of being able to realize a door opening and closing operation assist mechanism that is not unreasonable.

It is a perspective view which shows the outline | summary of the 1st assist mechanism arrange | positioned at the door hinge side which concerns on embodiment of this invention. It is a perspective view which shows the outline | summary of the 2nd assist mechanism arrange | positioned at the door body side which concerns on embodiment of this invention. FIG. 3 is an explanatory view showing the operation of both assist mechanisms shown in FIGS. 1 and 2; It is a perspective view which shows the outline | summary of the vehicle door assembly structure by a prior art. It is side surface sectional drawing which shows the structure inside the door body of the vehicle door assembly structure shown in FIG. It is a side view which shows the outline | summary of the other vehicle door assembly structure by a prior art.

  A door opening and closing assist mechanism according to a first embodiment of the present invention will be described with reference to the drawings. The gist of the present invention is to disperse the necessary assist force to both of the door hinge side and the door body side by providing the assist mechanism on both the door hinge side and the door body side, thereby making it possible to miniaturize any mechanism. FIG. 1 shows an example of a first assist mechanism provided on the door hinge side in the door assist mechanism according to the present embodiment. In the figure, the first assist mechanism 1 comprises a door hinge 10 and a torsion spring 15 added thereto. Similar to the related art shown in FIG. 4, the inner door hinge 10 includes a vehicle body side hinge arm 11, a door body side hinge arm 12, and a hinge pin 13 rotatably connecting these to form a hinge axis. It consists of In a normal vehicle, such a door hinge is provided as a pair in the vertical direction of each door body. However, the present invention is not limited to this, and a single door hinge as shown in Patent Document 2 may be twisted similarly. It is possible to arrange the spring 15.

  The torsion spring 15 is fitted around the hinge pin 13 and generates a torsional stress when the vehicle door (not shown) is closed, and is set to exert an urging force in a direction to open the door. ing. Although only one assist mechanism 1 is shown in FIG. 1, a torsion spring 15 may be attached to each of the door hinges 10 normally used as a pair to form the assist mechanism 1 as well. It is also possible or possible to arrange this only in one of the pair. This can be set arbitrarily in consideration of the balance between the required assist force and the assist force by the second assist mechanism provided on the door body side described later.

  To reiterate, the gist of the present invention is to make it possible to miniaturize any mechanism by providing the assist mechanism at two places of the door hinge side and the door body side. Therefore, the first assist mechanism 1 shown in FIG. 1 is merely an example of the assist mechanism provided on the door hinge side, and the present invention is not limited to this configuration. As another example of the assist mechanism provided on the door hinge side, for example, one end of the torsion bar is fixed to the body side hinge arm 11 of one of the pair of door hinges 10 and the door side hinge arm of the other door hinge 10 By fixing the other end to 12, it is possible to generate a reaction force due to torsion when opening and closing the door, and to use this reaction force as an assist mechanism. Even with this configuration, in the present invention, the second assist mechanism provided on the door body side, which will be described later, shares the assist force, so it is much smaller than the torsion bar shown in Patent Document 2, for example. It becomes possible to reduce the weight. Even in the case of a torsion spring, if it is provided only on the door hinge side, a stronger spring is required, which may cause problems in space and assembly.

  Next, a second assist mechanism is provided on the door body side, but from the spirit of the present invention, as with the first assist mechanism, any assist mechanism having any configuration may be used. For example, even if a gas-sealed damper or a coil spring is used, in the present invention, as long as the first assist mechanism is provided on the door hinge side, the second assist mechanism is also provided as a single assist mechanism. It becomes possible to reduce the size and weight. As an example, using a door check mechanism shown in FIG. 5, one end is fixed to a door body D located on the left side of the figure and the other end is secured using a coil spring fixed to the remote end of the check bar 6 located on the right side of the figure The tensile force of the coil spring can be used as the operation assist force.

  In this case, however, the check bar 6 pivots about the hinge pin 8 and the remote end of the check bar 6 swings to the left or right because it is restrained by the door checker, which interferes with other components in the door body. There is. For this reason, generally, the check bar 6 is not straight but bent in the shape of "<" and <"" in the lateral direction to avoid interference (see, for example, Patent Document 1). With such a shape, it is difficult to arrange the coil spring for assisting coaxially with the check bar 6, which may require an additional space in the door body.

  The second assist mechanism according to the present embodiment enables a compact structure that solves this problem, and FIG. 2 shows an example thereof. In the figure, the assist mechanism 2 according to the present embodiment is composed of a door check mechanism 20 having a shape unique to the present invention and a coil spring 25 fitted thereto. Among them, the door check mechanism 20 includes a door checker 21, a linear check bar 22 penetrating the door checker 21, a fixing bracket 23 for fixing the check bar 22 to the door body, and the door checker 21 according to the opening and closing of the door. And a link arm 24 which slides on the check bar 22. The ring arm 24 is rotatably attached to a bracket 30 whose one end is fixed to the vehicle body side, and the other end is rotatably attached to the door checker 21. The coil spring 25 is fitted coaxially with the check bar 22 on the remote end side (right side in the figure) of the check bar 22 partitioned by the door checker 21.

  The operation of the vehicle door open / close operation assist mechanism according to the present embodiment configured as described above will be described with reference to FIGS. 1 to 3. First, in FIG. 3, in the door check mechanism 20, the link arm 24 intrudes most into the door body D in a state where the vehicle door shown by the solid line in the figure is closed. You are moving to the right (remote end). When the door is opened from this state to the fully open position indicated by the alternate long and short dash line in the direction indicated by arrow A, the link between the hinge pin 8 which is the rotation center of the hinge H of the door body D and the rotation center C of the link arm 24 The arm 24 moves to the left relative to the door body D, and the door checker 21 connected thereto also slides on the check bar 22 to the left, and is in a state shown by a dashed dotted line.

  Concave grooves 22a are formed at several places in the longitudinal direction on the outer periphery of the check bar 22, and a pair of shoes (not shown) 19 (shown in FIG. 5) disposed in the door checker 21 fit in the grooves. Thus, the movement of the check bar 22 is restrained and the vehicle door is maintained at the predetermined opening position. Even if a pair of shoes once fit in the recessed groove 22a, when a further force is applied in the direction to open the vehicle door, the shoes move over the edge of the recessed groove 22a, and the door checker 21 moves further to the left in the figure. In this case, the side surface of the fixing bracket 23 serves as a stopper, and the door checker 21 moves to the leftmost position and stops. This is the position when the door is fully opened, which is indicated by the one-dot chain line in FIG.

  As shown in FIG. 3, since the check bar 22 is fixed at a close position so as to be in close contact with one panel of the door body D, the protrusion amount of the door check mechanism 20 into the door body D is minimized. As a result, the door check mechanism 20 can be installed in the door body D in a space-saving manner. In the present embodiment, the link arm 24 and the door checker 21 are pivotally coupled to each other so that the deflection is absorbed. Thus, the check bar 22 can be formed linearly, which also contributes to the suppression of the amount of protrusion. 2 and 3, the check bar 22 is drawn so as to be fixed to the door panel via the fixing bracket 23. However, if possible, the check bar 22 is directly raised by raising a pair of mounting pieces from the door panel side. It may be attached to this. By doing this, the protrusion amount of the check bar 22 into the door body D is further reduced, and the check bar 22 can be brought into close contact with the door panel up to the limit of the gap where the door checker 21 moves.

  In FIG. 3, the display of the torsion spring 15 (see FIG. 1) of the first assist mechanism 1 and the coil spring 25 (see FIG. 2) of the second assist mechanism 2 is omitted. Among them, it is clear that the operation of the first assist mechanism 1 is the reaction force generated by the torsion of the torsion spring 15 accompanying the opening and closing operation of the door hinge 10 shown in FIG. The second operation will be described with reference to FIG. Referring to FIG. 2, the second assist mechanism 2 has a coil spring 25 and a check bar 22 so as to cover the check bar 22 at the right side position of the door checker 21 with respect to the door check mechanism 20 configured as described above. It is configured to be arranged coaxially. In the door closed position where the door checker 21 is at the rightmost position in the figure, the coil spring 25 is in a fully compressed state, exerting the maximum biasing force for pressing the door checker 21 in the left direction in the figure. Thereafter, when the vehicle door is opened, the coil spring 25 extends in the axial direction, and exerts an assisting force for opening the vehicle door by pushing the door checker 21 leftward. The assist force by the first assist mechanism 1 is also added to the assist force, and the door checker 21 shown by the alternate long and short dash line in FIG. 3 acts until it reaches the leftmost position. Maintain a strong assist power.

  In the present embodiment, the assist force acts as an assist force for lifting the hinged shaft inclined type door upward when the door is inclined, and the assist force by the second assist mechanism 2 is provided on the door hinge 10 shown in FIG. Since the spring force of the assist mechanism 1 of 1 is also applied, the smaller size and light weight coil spring 25 functions as compared with the case where the biasing force is exerted on the door body D side alone. Since the coil spring 25 is arranged coaxially with the check bar 22 and can be made small and light in this way, the amount of projection into the door body is also reduced, and the design freedom related to the layout of other components is enhanced. . This makes the check bar 22 straight and fixed so as to be in close contact with the door body, and moves the door checker 21 toward the check bar 22 via the link arm 24, and assist force This was made possible for the first time by sharing it with the door hinge side.

  As another aspect of the second assist mechanism 2 shown in FIG. 2, the coil spring 25 utilizing a compressive force as an assist force is replaced with a coil spring utilizing a tensile force, and this coil spring is used for the door checker 21. It may be arranged coaxially so as to cover the left half of the check bar 21 on the left side of the figure instead of the remote end side on the right side of FIG. Thus, the spring exerts a tensile force on the door checker 21 at the position where the check bar 21 moves to the rightmost when the door is closed, and pulls the door checker 21 to the left side when the vehicle door is opened. It will exert an assisting force.

  Next, an assist mechanism for the door opening and closing operation according to the second embodiment of the present invention will be described. As a method of tilting the door hinge axis to avoid damage due to foreign object contact at the lower end of the door, in addition to tilting the above-mentioned hinge axis upward toward the central axis of the vehicle, the front of the vehicle (in the case of door rear opening) Is known to be inclined backward) (see, for example, Patent Document 2 and Patent Document 3). The forward inclination angle at this time is also preferably about 10 ° ± 5 °. By doing this, the movement locus of the lower end of the door when the door is opened, which is synthesized by both inclination angles in the left-right direction and the front-back direction, becomes the fully open position after the lift from above right after opening continues for a while This upward movement stops (hereinafter this position is referred to as "top dead center") when it reaches a certain opening slightly ahead, and then it moves slightly downward to maximize the door opening and open the door Will stop. The effect of such an arrangement is to more reliably prevent the door from closing naturally due to its own weight or the influence of wind when the door is at the maximum angle opening position.

  However, according to such correspondence, when the door is closed from the maximum open position, it is necessary to lift the door, which requires an extra operation force in the initial operation at the time of closing. In Patent Document 2, as a means for assisting this operation force, a neutral position where a twisting force does not act in any direction is provided on the torsion bar during the door opening / closing operation, and this neutral position is made to coincide with the top dead center. The torsion bar is attached. As a result, the reaction force due to the torsion of the torsion bar acting in the direction to open the door immediately after opening the door is opposite to the previous direction when going beyond the top dead center, that is, the neutral position to the open position. The reaction force in the opposite direction is used as an assist force at the start of the closing operation.

  The same action is possible in the second assist mechanism 2 according to the present embodiment. That is, in FIG. 2, in the previous embodiment, the coil spring 25 is set to the extent that the door is opened to the maximum and the biasing force is slightly applied even at the position where the door checker 21 has moved to the left end of the figure. The specification of this coil spring 25 is changed, and a coil spring 25 whose natural length is slightly shorter than the movement stroke of the door checker 21 is used, one end of which is the door checker 21 and the other end is the remote end of the fixing bracket 23 (FIG. Fix at the right end). As a result, the coil spring 25 opens from the closed state of the vehicle door and exerts a pressing force on the door checker 21 for a while, but when the vehicle door reaches a predetermined opening slightly before fully open position, the coil spring 25 has a natural length The pressure is lost. That is, it becomes a neutral position. After that, when the vehicle door is further opened, a tensile force starts to act on the coil spring 25, which in turn pulls the door checker 21 back. This tensile force can be used as an assist force for the initial operation when the door is fully closed.

  In the case of the present invention, since the assisting force in the direction of opening the door by the first assist mechanism 1 is applied, the assisting force by the first assist mechanism 1 and the assisting force in the opposite direction by the second assist mechanism 2 And the position where the combined assist force of both is zero is matched with the position of the top dead center where the door body lifts up to a maximum, thereby providing an assist force to both the opening and closing of the door. can do.

  As another aspect of the assist mechanism for lifting the vehicle door in the initial operation when closing the vehicle door, the check bar 22 in the left half, which is opposite to the coil spring 25 with respect to the door checker 21 in FIG. And a second coil spring (not shown) having a spring constant smaller than that of the coil spring 25 is additionally disposed to cover the space, and a large pressing force of the coil spring 25 is used as an assist force when opening the door. When the door is fully opened, the pressing force may be used as an assist force in the reverse direction by the second coil spring being compressed. Also in this case, it is the same as that of the above embodiment that the combined assist force to which the assist force by the first assist mechanism 1 is added should be taken into consideration.

  Although the door opening operation assist mechanism according to each embodiment of the present invention has been described above, the present invention also includes a door opening operation assist method having the same effect. In the door opening operation assisting method according to the present invention, the assisting force for assisting the initial operating force at the door opening time is dispersed to both the door hinge side and the door body side, and each assist mechanism is utilized using the combined assisting force. The present invention relates to a vehicle door operation assist method capable of reducing the size of each assist mechanism by reducing the load on the vehicle.

  Moreover, although the above description has been described with respect to the handling of the load due to the lifting of the vehicle door when opening and closing the vehicle door, the application of the present invention is not limited thereto. The present invention is equally applicable to the same mechanism, the same method, for example, when the vehicle door has an extremely heavy structure or when the door opening / closing operation is resisted for other special purposes.

  The vehicle door opening / closing operation assist mechanism and the opening / closing operation assist method according to the present invention manufacture or sell a vehicle equipped with a hinged door, or a vehicle that requires door opening / closing assistance by other factors. It can be widely used in the industrial field where it is used.

1. First assist mechanism, 2. Second assist mechanism, 10. 11. door hinge, Body side hinge arm, 12. 13. door hinge arm 13. 15. hinge pin, 15. 20. Torsion spring, 20. 21. door check mechanism; 22. Door checker, Check bar, 22a. Grooves, 23. Fixing bracket, 24. Link arm, 25. 30. Coil spring bracket

Claims (6)

In a door opening and closing operation assist mechanism that assists the operating force when opening and closing the vehicle door,
A first assist mechanism for reducing the operating force is provided on the door hinge side, and a second assist mechanism for reducing the operating force is provided on the door body side. A door opening / closing operation assist mechanism dispersed in both assist mechanisms.   The first assist mechanism is provided coaxially with the door hinge pin and configured to utilize a reaction force of a torsion spring which is twisted by the door closing operation, and the second assist mechanism is pulled by the door closing operation. The door opening / closing operation assist mechanism according to claim 1, wherein a reaction force of a coil spring disposed in the door body to be compressed is used.   The door opening / closing operation assist mechanism according to claim 2, wherein the coil spring is a coil spring disposed on an outer periphery of a check bar of a door check mechanism which maintains the door at a predetermined opening position when the door is opened or closed.   The check bar is linearly formed and fixed on the door body side, and the door checker is configured to slide and move along the outer periphery of the check bar via a link arm that rotates in accordance with the door opening and closing operation. The door opening / closing operation assist mechanism according to Item 3.   The assist force combined by the first assist mechanism and the second assist mechanism acts in the direction in which the vehicle door opens from the door closing position to the front of the door full open position, and the door full open from the front of the door full open position The door opening / closing operation assist mechanism according to claim 4, wherein the vehicle door is configured to act in the closing direction until the position. In a door opening and closing operation assist method for assisting an operation force when opening and closing a vehicle door,
The load on both assist mechanisms is reduced by reducing the assist force required for the door opening / closing operation to the assist mechanisms provided on the door hinge side and the door body side for reducing the operating force, thereby miniaturizing. A door opening / closing operation assist method characterized in that.

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