JPH0322460Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an opening/closing operation force adjustment device for a vehicle lid.

(Prior Art) Generally, a trunk lid provided at the rear of an automobile is pivotally supported toward the vehicle body via a pair of left and right U-shaped hinge arms provided on both sides in the vehicle width direction, and is connected to the vehicle body and each other. It is constantly biased in the lid opening direction by a reaction force of torsion deformation of a torsion bar disposed between the hinge arm (hereinafter simply referred to as torsion reaction force) (see, for example, Japanese Utility Model Application Publication No. 56-57178).

By the way, in the case where the trunk lid, which is pivotally supported by the hinge arm, is biased in the direction of opening the lid by the torsional reaction force of the torsion bar, the problem occurs due to the following reasons. It is necessary to appropriately adjust the torsional reaction force characteristics of the torsion bar depending on the opening degree of the trunk lid. In other words, the trunk lid has a rotational moment due to its own weight (the curve in Fig. 7).
_L1 ) and the rotational moment due to the torsional reaction force of the torsion bar act.In this case, if the torsion bar is provided directly between the vehicle body and the hinge arm as in the above-mentioned known example, The rotational moment due to the torsional reaction force of the torsion bar increases inversely with the opening degree of the trunk lid, as shown by curve _L2 in FIG.
In particular, when the trunk lid is fully closed, its rotational moment becomes excessive compared to the rotational moment due to the trunk lid's own weight, and as a result, when the trunk lid is opened, the trunk lid suddenly opens with a large force, and its operating characteristics change. It cannot be said that it is necessarily suitable.

Given this background, instead of directly providing the torsion bar between the vehicle body and the hinge arm, the torsion bar and the hinge arm are indirectly connected via a link mechanism, and the operating characteristics of this link mechanism are utilized. By adjusting the torsion reaction force of the torsion bar as appropriate, the curve shown in Fig. 7 is obtained.
A product has been developed that achieves the ideal characteristics shown in _L3 (i.e., characteristics that allow the trunk lid to lift up properly in the entire operating range from the fully closed state to the fully open state). (For example, Publication of Utility Model Publication No. 54-44151).

Incidentally, although the torsional reaction force of the torsion bar when it is attached to the vehicle body is likely to change due to the influence of manufacturing errors of the link mechanism, assembly errors of the torsion bar, etc., in the above-mentioned known examples, the above-mentioned Because no consideration was given to changes in the torsional reaction force of the torsion bar on the opposite side, in some cases, ideal spring characteristics as shown by curve _L3 in Figure 7 were intended at the time of design. However, in reality, the spring characteristics are significantly different from this, and as a result, when a person opens and closes the trunk lid by hand, the opening/closing force is inappropriate, leading to problems such as deterioration of operability. .

In addition, since it is not possible to adjust the torsion reaction force after the torsion bar is assembled to the vehicle body, it is necessary to create a large torsion reaction force (i.e. initial spring load) during the assembly process. There was also a problem that the workability was poor, such as having to assemble it to the vehicle body and the assembly work was difficult.

(Purpose of the invention) The present invention is an attempt to improve the problems pointed out in the above-mentioned prior art section, by making it possible to easily adjust the torsion reaction force of the torsion bar while it is assembled to the vehicle body, This was designed to improve work efficiency when assembling the torsion bar to the vehicle body, and to improve operability by always maintaining an appropriate opening/closing force for the lid.

(Means for Achieving the Object) As a means for achieving the above object, the present invention provides a lid for opening and closing an opening formed on the vehicle body side, one end of which is pivotally supported on the vehicle body side. Further, the U-shaped hinge arm, the other end of which is fixed to the lid, is rotatably supported on the vehicle body side, and one end of the U-shaped hinge arm is connected to the hinge arm between the hinge arm and the vehicle body. A torsion bar of an appropriate length is arranged, the other end of which is fixed to the vehicle body, and the hinge arm is constantly biased in the direction of opening the lid by utilizing a reaction force caused by torsional deformation of the torsion bar. In the vehicle lid, a rotary lever is provided on the vehicle body on one end side of the torsion bar, and the rotary lever is pivotally supported on the vehicle body, and one end of the torsion bar is locked to the rotary lever, and the rotary lever and An appropriate adjusting means is provided between the torsion bar and the vehicle body, the tip of which abuts one end of the rotary lever, and which is screwed in to rotate the rotary lever and adjust the torsional deformation of the torsion bar.

(Function) In the present invention, by the above means, (1) the torsion deformation of the torsion bar, that is, the torsional reaction force can be easily adjusted by the adjustment means, so when assembling the torsion bar to the vehicle body side, the torsion bar Assembling work is performed with almost no torsional reaction force generated during assembly, and after assembly is completed, the torsional reaction force is increased to an appropriate value to obtain the desired torsional reaction force, so a large torsional reaction force is applied in advance. (2) The torsion reaction force of the torsion bar can be adjusted while the torsion bar is assembled to the vehicle body. For example, even if there is an assembly error, the torsional reaction force of the torsion bar can be easily corrected to match the design value after the fact,
(3) One end of the torsion bar is securely held by a rotary lever, and one end of the rotary lever can be adjusted with a screw. The torsion deformation of the torsion bar can be adjusted by rotating it with the means, and in this case, the torsion bar is held by the rotary lever, and the torsion deformation of the torsion bar is adjusted by the adjusting means, respectively. Therefore, when adjusting the torsional deformation of the torsion bar, it is possible to easily and accurately adjust the torsion bar without worrying about the holding state of the torsion bar.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 6.

(First Embodiment) Fig. 1 shows the rear part of an automobile 1 to which the opening/closing operation force adjustment device of the present invention is applied. This is a trunk lid that is closed, and the trunk lid 3 is pivotally supported by a vehicle body side member 4 located at the front edge of the trunk room.

The trunk lid 3 has a pair of left and right opening/closing support mechanisms, which will be described later, provided at both front ends of the trunk lid, that is, a first opening/closing support mechanism 11 located on the left side in the direction of vehicle movement and a second opening/closing support mechanism 12 located on the right side. The lid is supported so as to be rotatable in the vertical direction, and is always biased in the lid opening direction by the spring force of two torsion bars 15 and 16, which will be described later, and which are disposed across the pair of opening/closing support mechanisms 11 and 12. I'm being forced to do it.

As shown in FIGS. 2 to 4, the torsion bars 15 and 16 are each made of a wire rod of an appropriate length, and both ends 15a and 15b and the same 16a and 16b are parallel to each other with an appropriate distance between them. It is bent into a substantially shape having a pair of shaft parts facing each other in the direction, that is, a base shaft part 45 located on the non-bent part side and an eccentric shaft part 46 located on the bent side. Furthermore, these two torsion bars 15,
16, the first torsion bar 15 has one end 15a facing the first opening/closing support mechanism 11 (described later) and the other end 15b facing the second opening/closing support mechanism 1 (described later).
It is adapted to be locked on each of the two sides. On the other hand, the second torsion bar 16 has one end 16a opposite to the first torsion bar 15.
The other end 1 is attached to the second opening/closing support mechanism 12 side, which will be described later.
6b are respectively latched to the side of a first opening/closing support mechanism 11 which will be described later.

The specific structure of the pair of left and right opening/closing support mechanisms 11 and 12 interconnected by the first torsion bar 15 and the second torsion bar 16 will be described below with reference to FIG. As shown in FIG. 4, the two opening/closing support mechanisms 11 and 12 are constructed by arranging identical configurations facing each other in opposite directions. 1 opening/closing support mechanism 1
The specific configuration will be explained using No. 1 as an example.

The first opening/closing support mechanism 11 is shown in FIGS.
As shown in the figure, it has a hinge arm 13 that is integrally formed in a substantially U-shape, and a substantially flat mounting base 20 that serves as a mounting portion of the hinge arm 13 on the vehicle body side. This mounting base 20 is fixed to the lower surface of the vehicle side member 4 (inner surface side of the trunk room 2), and has a first fulcrum pin 2 approximately in the center thereof.
The first link lever 21 is pivotally supported via the link lever 7 in the longitudinal direction of the vehicle. The first link lever 21 also has the hinge arm 13.
One end 13a of is fixed. The other end 13b of the hinge arm 13 is fixed to the back surface of the trunk lid 3. Therefore, hinge arm 1
3 is a second fulcrum pin 27 centered on the first fulcrum pin 27.
As shown in the figure, the position where the trunk lid 3 is held in the horizontal direction (this position is the position where the trunk compartment 2 is closed by the trunk lid 3, and in the following explanation, this position will be referred to as the closed lid position).
and a position where the trunk lid 3 is held in an upwardly inclined state as shown in FIG. It can be pivoted freely between two positions (up and down).

Furthermore, this first link lever 21 is connected to a second link lever 22 which is pivotally supported on the mounting base 20 side.
and one end of the second link lever 22 and the first
The link mechanism 19 includes a third link lever 23 that pivotally connects one end of the link lever 21 to the other, and a fourth link lever 24 that is pivotally connected to the middle part of the second link lever 22. It consists of Further, at the tip of the fourth link lever 24, one end 15a of the first torsion bar 15 is provided.
A fitting hole 33 into which the eccentric shaft portion 46 is fitted is formed. Further, a fixing bracket 25 protruding from the lower surface of the substantially central portion of the mounting base 20 is formed with a fitting groove 26 into which the base shaft portion 45 of one end 15a of the first torsion bar 15 engages. Therefore,
Assuming that the other end 15b of the first torsion bar 15 is fixed on the second opening/closing support mechanism 12 side, when the hinge arm 13 rotates in an arc in the vertical direction (arrow A-B direction), , on the one end 15a side, the eccentric shaft portion 46 is rotationally displaced in the direction of arrow C-D about the base shaft portion 45, and the first
The torsional deformation of the torsion bar 15 as a whole, that is, the torsional reaction force is increased or decreased as appropriate.

On the other hand, on the opposite side of the link mechanism 19 of the mounting base 20, a second opening/closing support mechanism 12 is provided, similar to the one end 15a of the first torsion bar 15.
A locking mechanism 48 for locking the other end 16b of the second torsion bar 16 whose one end 16a is locked and an adjustment mechanism 49 for adjusting torsional deformation of the second torsion bar 16 are provided on the side. ing.

The locking mechanism 48 is connected to a fitting groove 39 formed in a bracket 36 fixed to the mounting base 20 and the fitting groove 3.
9, and a substantially L-shaped pivot lever 35 that is pivotably provided via a sixth fulcrum pin 32 at a position appropriately spaced from the second torsion bar 16. The base shaft portion 45 is engaged with the fitting shaft 39, and the eccentric shaft portion 46 is engaged with one lever end 35a of the rotating lever 35.

The adjustment mechanism 49 causes the second torsion bar 16 to be torsionally deformed as a whole by rotating the eccentric shaft portion 46 of the other end 16b of the second torsion bar 16, which is locked by the locking mechanism 48, about the base shaft portion 45. (that is, torsional reaction force), and is composed of an adjustment bolt 37 that can come into contact with the other lever end 35b of the rotating lever 35. By adjusting the amount of screwing in of the rotating lever 35,
The torsional deformation of the second torsion bar 16 is adjusted to increase or decrease as appropriate by rotating the torsion bar 16 in the direction of the arrow EF. In this embodiment, by screwing in the adjustment bolt 37, the other end 16a of the second torsion bar 1 moves from the position shown by the solid line in FIG.
6b') and the second torsion bar 1
The operating characteristics are set so that the torsional reaction force of No. 6 is increased.

In this way, the pair of left and right opening/closing support mechanisms 1
Two torsion bars 15 and 16 are disposed between the torsion bars 1 and 12, respectively, with appropriate initial torsion reaction force applied thereto. Therefore, the trunk lid 3, which is pivotally supported by the first opening/closing support mechanism 11 and the second opening/closing support mechanism 12, is always moved in the lid opening direction by the torsional reaction force of the two torsion bars 15, 16. energized. For this reason,
When the trunk lid 3 is in the closed state, when the lock mechanism (not shown) that fixes the trunk lid 3 in the closed state is released, the trunk lid 3 absorbs the torsional reaction force of the first torsion bar 15 and the second torsion bar 16. The lid will be opened automatically when the lid is received. In this case, if the magnitude of the torsional reaction force of the first torsion bar 15 and the second torsion bar 16 is inappropriate, for example, the trunk lid 3 may open rapidly and with a large operating force at the same time as the lock mechanism is released. It works, etc.
As mentioned above, the opening/closing operability deteriorates. However, in this embodiment, the torsional reaction force of the first torsion bar 15 and the second torsion bar 16 is transferred to the first opening/closing support mechanism 11.
Since the adjustment mechanism 49 of the first torsion bar 1 and the adjustment mechanism 49 of the second opening/closing support mechanism 12 can be adjusted appropriately, for example, the first torsion bar 1 may be adjusted due to assembly errors or manufacturing errors between each member.
5 or the second torsion bar 16 and the design value, even if there is a relatively large difference between the initial torsion reaction force of the second torsion bar 16 and the design value, each opening/closing support mechanism 11,
By appropriately adjusting the adjusting bolts 37 of the 12 adjusting mechanisms 49, it is possible to easily make the initial torsion reaction force of the first torsion bar 15 or the second torsion bar 16 individually match the design value. . Therefore, trunk lid 3
An appropriate biasing force in the lid opening direction is always applied to the lid. Therefore, the trunk lid 3 can be opened at an appropriate speed and with a moderate manual operating force, and the opening/closing operability of the trunk lid 3 is improved accordingly.

Further, since the adjustment mechanism 49 allows the torsional reaction force of the first torsion bar 15 and the second torsion bar 16 to be adjusted after they are assembled to the vehicle body, for example, the first torsion bar 15 and the second torsion bar 16 can be adjusted. When the second torsion bar 16 is assembled to the vehicle body, the torsional reaction forces of the first torsion bar 15 and the second torsion bar 16 can be increased to respective design values. Therefore, in this case, the first
The assembling work of the torsion bar 15 and the second torsion bar 16 to the vehicle body is easier than when the torsion bar 15 and the second torsion bar 16 are assembled under conditions where a torsion reaction force close to the design value is applied. This will improve work efficiency.

Furthermore, in this embodiment, the other end 15b of the first torsion bar 15 and the other end 16b of the second torsion bar 16 are securely secured by the respective rotation levers 35, 35 of the pair of locking mechanisms 48, 48, respectively. Each torsion bar 1
Adjustment of the torsional deformation of the rotary levers 35 and 16 is performed by appropriately rotating the respective adjusting bolts 37 and 37 of the adjusting mechanisms 49 and 49 that abut and engage the respective rotary levers 35 and 35, respectively. I try to do it by. In other words, the action of holding the other ends 15b, 16b of the torsion bars 15, 16 and the action of adjusting the torsional deformation of the torsion bars 15, 16 are performed separately by the locking mechanism 48 and the adjustment mechanism 49, each having a separate function. It will be held in Therefore, when adjusting the torsion deformation of the torsion bars 15, 16, it is necessary to
The adjustment mechanism 49 can be operated easily and accurately without worrying about the holding state of the adjustment mechanism 49, and there is an advantage that the workability during the adjustment work is improved accordingly.

(Second Embodiment) FIGS. 5 and 6 show a pair of left and right opening/closing support mechanisms 51 and 52 constituting an opening/closing operation force adjusting device according to a second embodiment of the present invention, and these opening/closing support mechanisms 5.
Two torsion bars 55 and 56 are shown which are disposed astride between the two torsion bars 1 and 52. The structure and operation of the opening/closing support mechanisms 51, 52 and the two torsion bars 55, 56 of this embodiment are as described in the first example above.
The structure is basically the same as that of the embodiment, except that a link mechanism 59 that locks one end 55a of the first torsion bar 55 and one end 56a of the second torsion bar 56, and the other parts of the first torsion bar 55 are provided. End 55b and second torsion bar 56
The structure of the locking mechanism 88 that locks the other end 56b is slightly different from that of the first embodiment. Hereinafter, the specific configuration of the link mechanism 59 and the locking mechanism 88 will be explained using the first opening/closing support mechanism 51 as an example.

The link mechanism 59 includes a first link lever 61 integrated with the hinge arm 53 and a second link lever 62 pivotally connected to the first link lever 61. The base shaft portion 85 of one end 55a of the first torsion bar 55 is formed on the mounting base 60 side, and the eccentric shaft portion 86 is formed on the fitting groove 66 formed at the tip of the second link lever 62.
They are designed to fit inside each other. Therefore, one end 55a of the first torsion bar 55 rotates at its base portion 8 as the hinge arm 53 pivots.
It is rotated around 5.

The locking mechanism 88 has a substantially disc-shaped rotating lever 75 that is pivotally connected to a bracket 76 fixed to the mounting base 60 via a fulcrum pin 74. This rotary lever 75 has a pair of locking portions at two radially opposite positions on its outer periphery, that is, a first locking portion 91.
and a second locking part 92, and the base shaft part 85 of the other end 56b of the second torsion bar 56 is connected to the first locking part 91, and the second locking part 92
The eccentric shaft portions 86 are respectively engaged with each other (see FIG. 5). Also, this rotating lever 7
An adjustment bolt 77 of an adjustment mechanism 89 is abuttingly engaged with the adjustment mechanism 89, and by screwing in the adjustment bolt 77, the rotation lever 75 is appropriately rotated. The torsional reaction force is adjusted accordingly. That is, in this second embodiment, the other ends 5 of the torsion bars 55 and 56 are similar to the first embodiment.
The locking mechanism 88 that holds the torsion bars 5b and 56b, respectively, and the adjustment mechanism 89 that adjusts the torsional deformation of the torsion bars 55 and 56 are separate mechanisms. There is an advantage that the torsional deformation of the torsion bars 55, 56 can be easily and accurately adjusted by the adjustment mechanism 89 without any trouble.

Furthermore, this second embodiment is similar to the first embodiment described above.
It goes without saying that the same effects as those of the first embodiment can be obtained, but there is also an additional advantage that the structure of the link mechanism 59 is particularly simplified compared to that of the first embodiment.

(Effect of the invention) The opening/closing operation force adjustment device for a vehicle lid of the present invention has one end pivotally supported on the vehicle body side, and the other end of the lid for opening and closing an opening formed on the vehicle body side. It is pivotally supported on the vehicle body side via a U-shaped hinge arm fixed to the lid, and is placed between the hinge arm and the vehicle body, with one end thereof being connected to the hinge arm and the other end being pivotally supported on the vehicle body side. In the vehicle lid, in which torsion bars of appropriate lengths are respectively fixed to the vehicle body, and the hinge arm is always biased in the direction of opening the lid by using reaction force due to torsional deformation of the torsion bars. A rotary lever is provided on the vehicle body at one end of the torsion bar, and the one end of the torsion bar is locked to the rotary lever, and there is a gap between the rotary lever and the vehicle body. The torsion bar is characterized by being provided with an appropriate adjusting means whose tip abuts one end of the rotary lever and which is screwed in to rotate the rotary lever and adjust the torsional deformation of the torsion bar. .

Therefore, according to the vehicle lid opening/closing operation force adjusting device of the present invention, (1) the torsion deformation of the torsion bar, that is, the torsional reaction force can be easily adjusted by the adjusting means, so that the torsion bar is not moved toward the vehicle body; During the assembly work, it is possible to perform the assembly work with almost no torsion reaction force generated on the torsion bar, and after the assembly is completed, the torsion reaction force can be increased to an appropriate value to obtain the predetermined torsion reaction force. , when assembling the torsion bar to the vehicle body under a condition where a large torsional reaction force is applied in advance, the assembling work is easy;
(2) Since the torsion reaction force of the torsion bar can be adjusted while the torsion bar is assembled to the vehicle body, even if there is an assembly error, for example, the torsion bar can be easily assembled. The torsional reaction force can be easily adjusted to match the design value after the fact.
As a result, the human opening/closing force applied to the lid can always be set appropriately, and the operability of the lid can always be maintained in good condition. (3) One end of the torsion bar is securely held by the rotary lever, and The torsional deformation of the torsion bar can be adjusted by rotating one end of the rotary lever with a screw-type adjusting means. In this case, the torsion bar is held by the rotary lever, and the torsional deformation of the torsion bar is adjusted by the rotary lever. Since each adjustment is performed separately using the adjustment means, it is possible to easily and accurately adjust the torsion deformation of the torsion bar without worrying about the holding state of the torsion bar. You can get the desired effect.

[Brief explanation of drawings]

Fig. 1 is a rear perspective view of an automobile to which the opening/closing force adjustment device of the present invention is applied, and Fig. 2 is a rear perspective view of an automobile to which the opening/closing force adjustment device of the present invention is applied.
A side view of the opening/closing support mechanism constituting the opening/closing force adjustment device according to the embodiment, FIG. 3 is a state change diagram of FIG. 2, FIG. A side view of the opening/closing support mechanism constituting the opening/closing operation force adjustment device according to the second embodiment of the invention, FIG. 6 is a view taken from the - arrow in FIG. 5, and FIG. 7 shows moment characteristics due to the weight of the trunk lid of an automobile. It is a comparison diagram with the moment characteristic by a torsion bar. 1... Car, 2... Trunk room, 3...
Trunk lid, 4... Vehicle body member, 11, 51...
...First opening/closing support mechanism, 12, 52... Second opening/closing support mechanism, 13, 53... Hinge arm, 1
5,55...first torsion bar, 16,56
...Second torsion bar, 20,60...Mounting base, 21,22,23,24,61,62...
Link lever, 35, 75... Rotating lever, 3
7, 77... Adjustment bolt, 48, 88... Locking mechanism, 49, 89... Adjustment mechanism.

Claims (1)

[Scope of utility model registration request] A lid that opens and closes an opening formed on the vehicle body side is connected to the vehicle body side via a U-shaped hinge arm whose one end is pivoted to the vehicle body side and whose other end is fixed to the lid. A torsion bar of an appropriate length is disposed between the hinge arm and the vehicle body and has one end fixed to the hinge arm and the other end fixed to the vehicle body. In a vehicle lid that constantly biases the hinge arm in the direction of opening the lid by utilizing reaction force caused by torsional deformation, the vehicle body at one end of the torsion bar is provided with a rotary member that is pivotally supported by the vehicle body. A lever is provided, one end of the torsion bar is locked to the rotating lever, and the tip of the torsion bar is in contact with the one end of the rotating lever between the rotating lever and the vehicle body. 1. An opening/closing operation force adjustment device for a vehicle lid, characterized in that an appropriate adjustment means is provided for adjusting the torsional deformation of the torsion bar by rotating a moving lever.