JPH0810549Y2 - Connecting link mechanism in vehicle tilt assist opening / closing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a connecting link mechanism of a vehicle tilt assist opening / closing device.

2. Description of the Related Art The applicant of the present invention has already registered, as a registered utility model No. 1,5753,458, "a tilting door opening and closing assist device for a vehicle" (K.
The present invention was made in order to solve the following problems at the time of the application.

That is, as described in the publication, at the time of filing the previous invention, a freight vehicle for transportation (a freight car, a rail freight car, etc.) responds to requests for mass transportation and rationalization of physical distribution,
Although the size of the cargo tended to increase, the number of workers tended to decrease, and in order to mitigate this situation, the tilting doors of freight vehicles, which are becoming larger and heavier (to surround the cargo bed, Side plate attached to the vehicle so that it can be opened and closed,
While it has become necessary to open and close it with fewer people, various types of assisting devices for opening and closing doors have been proposed from the viewpoints of preventing danger of opening and closing doors, preventing damage to the doors, and reducing labor. However, all of the conventional proposals cannot prevent the working space from invading the cargo space due to mechanical restrictions, and the opening of the tilt door. Those that do not act as dampers for shock absorption,
Alternatively, the restoration rotation moment characteristic curve generated by the auxiliary device does not match the rotation moment characteristic due to the weight of the tilt door and the tilt curve of the tilt door during the entire opening / closing operation of the tilt door. It is the situation at that time that perfect things such as things that can not be done have not appeared yet, and as its operating mechanism, 1 link,
Two-link and four-link mechanisms are typical ones, and as a two-link mechanism among them, a technique of continuously moving the action point of the restoring force on the rotating arm is known (Jitsuko Sho-47- No. 13923), this device cannot convert the operation start angle of the restoring force during the stroke, so that the restoring rotational moment is insufficient over the entire stroke, and especially, the shortage is remarkable in the middle part of the stroke. As another type of the two-link mechanism, there is also known a system in which a tension spring force is applied to a specific radius of action on a rotating arm to thereby obtain a restoring rotational moment. However, since the working radius and the operation start angle cannot be converted in the middle of the stroke, the force is insufficient in the first half and the second half of the stroke. Even if the lack of such supplement by preloading deflection, the second half of the lack, there as the disadvantage that still exists.

The prior invention owned by the applicant of the present invention is to provide a "tilt door opening / closing assisting device for a vehicle" which solves the above-mentioned various drawbacks of the conventionally known two-link mechanism. Also, the "vehicle tilting door opening / closing assisting device" according to the present invention solves various drawbacks of the conventionally known device and achieves the intended purpose.
It has been confirmed from its many use records.

The problem to be solved by the invention is that recently, for a freight vehicle, the "length" which is the dimension from the frontmost part to the rearmost part and the "width" which is the dimension between the outermost surfaces on both sides of the front part of the freight vehicle, On the other hand, in view of legal restrictions, it is desirable to make the inner surface width as large as possible in order to maximize the capacity of the loading platform within the restrictions on these dimensions. ing.

For this reason, it is required to minimize the increase in the width of the vehicle due to the attachment of the device to the outer surface of the tilting door of the freight vehicle, compared to the "vehicle tilting door opening / closing auxiliary layer" proposed above. ing.

Therefore, the present invention has improved the "orientation door opening / closing assistance device for vehicle" according to the previous invention owned by the present applicant so as to be able to meet such a demand, and in particular, the freight vehicle of the connecting link. It is an object of the present invention to obtain a connecting link mechanism for a "vehicle tilt-opening / closing assisting device" that minimizes the mounting size of the tilt-locking door.

Means for Solving the Problem In order to solve the problem, the present invention provides a connecting link (10) having one end pivotally attached to a part of a tilting door (1), as shown in the accompanying drawings. One end of the rotating arm (11) is pivotally attached to the other end, and the other end of the rotating arm (11) is pivotally attached to the vehicle via the pivot (E), and a part of the rotating arm (11) is attached. An elastic body (1) in which a pull rod (13) is pivotally attached at one end thereof, and the other end of the pull rod (13) is installed on a vehicle.
A tilting door auxiliary opening / closing device for a vehicle, in which an elastic force is applied to the rotating arm (11) from the elastic body (15) via the pull rod (13), which is connected to the rotating arm (11). A triangular link (12) is inserted between the pull rod (13) and the pull rod (13), and this is pivotally attached to a part of the rotary arm (11) at one vertex (D) and at the other vertex (H). The pull rod (13) is pivotally attached to one end of the pull rod (13), and the other vertex (I) of the triangular link (12) is hook-shaped, and this is pivoted (E) of the rotary arm (11).
In a vehicle tilting door opening and closing assisting device adapted to be engaged with, the connecting link (10) is attached to the tilting door (1) and has a "gate" -shaped planar contour. a bracket (30) consisting of vertical plates member has a width corresponding to the spacing between the bracket both vertical leg portion (30) (30 _1), the vertical plate member is a plan outline rectangular The side link (40) and the upper part (41) of the side link (40) are attached to the bracket (3
The horizontal pin shaft (43) is rotatably mounted at a distance from the inner side (30 ₂₁ ) of the top part (30 ₂ ) of (0), and each end of the pin shaft (43) is attached to the bracket (30). connecting link mechanism for both the leg portions (30 ₁₎ of a vehicle tilt door auxiliary switching device comprising fixed respectively is characterized in.

Embodiments Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, first to
A detailed description will be given based on Fig. 3 and Figs. 4 to 10 showing an example of "a tilting door opening and closing assist device for vehicle" according to the above invention. First, before describing the present invention, the present invention is improved. The outline of the structure and operation of the "vehicle tilting door opening / closing assisting device" according to the above invention intended for the above will be explained based on the "detailed description of the device" and the drawings described in the publication.

As shown in FIG. 4 (FIG. 1 of the gazette), this “vehicle tilting door opening / closing assisting device” has hinges 4 around a floorboard 3 laid on a horizontal joist 2 of a tilting door 1 of a freight vehicle. It is rotatably attached via the, and is in a closed position standing perpendicular to the surface of the floorboard 3, and in the counterclockwise direction as seen in the figure.
It is possible to turn between an open position that is turned 180 °. In addition, the "vehicle tilting door opening / closing assisting device" has an L-shaped cross section having a tilting door 1 and mutually orthogonal walls 5 ₁ and 5 ₂ that are hung and fixed to the lateral joist 2. A vertical connecting link 10 which is arranged via a bracket 5 and whose upper end is pivotally attached to a part of the outside of the tilt door 1 via a hinge B above the hinge 4 and a lower end of the connecting link 10. parts in via a hinge C and pivot arm 11 substantially triangular pivotally mounted on one wall 5 ₁ of the bracket 5 via a hinge E in one of the vertices of the lower together with one vertex of the upper is hinged , A triangular link 12 in which one upper vertex is pivotally attached to another upper vertex of the rotating arm 11 via a hinge D.
When one end portion extending substantially horizontally through other walls 5 loosely hole 5 'bored in the _second bracket 5 while being pivotally mounted to through the other of the upper vertex hinge H of the triangular link 12 The pull rod 13, the seat plate 14 arranged at the other end of the pull rod 13 to prevent the nut F from coming off, and the hole 5'of the bracket 5.
It is made up of elastic body 15. such as a coil spring disposed preloaded deflection X ₀ between the wall 5 ₂ of the outer surface provided with. In addition, another apex I below the triangular link 12
Is formed in a hook shape, and when the triangular link 12 moves with the counterclockwise rotation about the hinge E of the rotating arm 11 via the hinge D at one vertex above the triangular link 12, the rotating arm 11 moves. At a certain rotation angle, the hook-shaped apex I engages with the hinge E of the rotating arm 11 via an appropriate mechanism, and thereafter, the triangular link 12 becomes integral with the rotating arm 11 and It is adapted to rotate around the hinge E.

The above invention has such a configuration, but its operation will be explained based on FIG. 5 (FIG. 2 of the publication) which is a simplified illustration of FIG. There is. In addition, in the same description, in order to simplify the description, the tilting door 1
Is represented by the line segment OA (however, O represents the hinge 4), the connecting link 10, the rotating arm 1
1, the triangular link 12, the pull rod 13, etc. are represented by the line segments BC, SC, DHI, HF, etc. that connect the centers of the hinges, respectively, and the elastic body 15 is actually the wall of the bracket 5.
5 ₂ Contact part G with ₂ and seat plate attached to pull rod 13
It is drawn so as to exert a compressive action between the contact portion F and the contact portion 14 (see FIG. 4) and to perform a pulling action equivalent to this action.

Then, in the arrangement of each member simplified as shown in FIG. 5, the tilt door OA is arranged around the hinge O,
180 ° in the direction of arrow X from the vertical position OA shown in FIG. 5A.
It is supposed to be turned and opened. Also, Aori door
The new position of each hinge in the link relation of this system is shown with a dash when the OA turns by an angle θ ₁ . Considering this system geometrically and mechanically, the turning of the tilting door OA by the angle θ ₁ gives
It is understood that the tensile elastic force acts on the elastic body FG, and as a result, the restoring rotation moment is generated in the tilting door 1 by the connecting link BC, the rotating arm EC, etc. via the hinge B, This rotation moment M ₁ is
It is represented by a formula. In addition, with reference to FIG. 5B (FIG. 2B of the same publication), the double action radius method which is the most important feature of the invention is explained. It should be noted that FIG. 6 (FIG. 3 of the same publication) is a diagram showing an example of the relationship between the rotation moment measured about the center of rotation of the tilting door 1 and the opening angle of the tilting door when the tilting door 1 is naturally opened. As shown in FIG. 7 (FIG. 4 of the publication), the relationship between the restoring rotational moment of the rotation center of the tilting door generated by the tilting door opening and closing assist device and the opening angle of the tilting door is shown in FIG. It is shown in the diagram that it can be changed by changing the combination of each parameter. In FIG. 8 (FIG. 5 of the same publication), the characteristic of one embodiment of the invention, that is, the restoring rotational moment is large. The solid line and the rotation moment due to the weight of the tilting door are shown by the thin solid line, and both curves are substantially the same over the full opening angle of the tilting door, and the effect of the invention is obtained. Is shown .

The configuration of the above invention and the outline of the operation and effect thereof have been described above. For details, refer to the description of the publication.

Further, FIGS. 9 and 10 show one design example in which the above invention is implemented, mainly showing a front view and a side sectional view of a mounting state of the connecting link 10 and the like to the tilting door 1. As shown in FIG. 3, an aluminum block tilting door 1 having a double hollow wall structure as a tilting door is provided around a floor 3 laid on a horizontal joist 2 of a freight vehicle so as to be freely rotatable through a hinge (not shown). Although attached, the tilt door 1 is in its lower part, the interior of the vehicle body through the lower step 1 ₀ consisting of the inclined surface, and consists of a vertical member which is retracted a certain size, tilt door for vehicles connecting link 10 of the opening and closing auxiliary device is constituted by a vertical plate member having a cross section of the channel, also the outer surface of the tilt door 1, horizontal top in the upper portion of the lower step 1 ₀ The side of a hollow triangular shape with sides The protruding portion 21 having a surface formed substantially vertical plate-like bracket 22, which is bolted in the lower portion of the lower step 1 _0, the upper end portion of the connecting link 1, the horizontal protrusions 21 of the bracket 22 Is inserted in the vertical notch 23 formed in the central part of the
A pin shaft 24 is horizontally fixed inside the projecting portion 21, and the pin shaft 24 is passed through a through hole formed horizontally in each groove-shaped side edge member near the upper end of the connecting link 10. It is rotatably supported by. In this case, the bracket
Between the rear surface of the upper end of 22 and the outer surface of the tilt door 1,
Spacer having a thickness corresponding to the dimensions of the lower step 1 ₀
25 has been inserted.

In the above invention, the connecting link 10 is actually attached to the tilting door 1 in this manner, and in this case, the rear surface of the upper end portion of the bracket 22 and its protruding portion.
The distance D between the top of 21 is approximately 30 mm.

On the other hand, the present invention aims to reduce the dimension D of about 30 mm in the design example shown in FIGS. 9 and 10 to about 18 mm in the same freight vehicle, for example. .

One embodiment of a connecting link mechanism according to the present invention for solving this problem is shown in FIGS.

As shown in these figures, this connecting link mechanism 10 is
Is to be attached to an aluminum block tilt door 1 has a lower step 1 ₀ (see FIG. 10), substantially the front contour shape of a "gate", symmetrical to the vertical bisector X-X A bracket 30 composed of a conventional vertical plate member and a plane contour of such width that it fits within the space between both leg portions 30 ₁ of this bracket 30, the cross section being groove-shaped. And a side link 40 formed of a certain vertical plate member.

Bracket 30, top portion 30 ₂ which are connected horizontally the upper leg portion 30 ₁ of the both to each other, corresponding to the lower step 1 ₀ formed on tilt door 1, the leg portions 30 ₁ of the outer surface A vertical concave portion 30 ₂₂ is formed inwardly from the inside in parallel with it to form a vertical concave portion 30 _22. The vertical concave portion 30 ₂₂ has a vertical second portion of the bracket 30 for attaching the bracket 30 to the tilting door 1. outside the symmetrical one by one bolt hole 31 with respect to minute line X-X are formed through, the lower part of the leg portions 30 _1, Similarly, with respect to the vertical bisector X-X Symmetrically, two bolt holes 32 are drilled.

On the other hand, the upper part 41 of the side link 40 is a "gate".
It has a width that fits comfortably within the space between the leg portions 30 ₁ of the U-shaped bracket 30 and its upper side 41 ₁ is spaced parallel to the inner side 30 ₂₁ of the top portion 30 ₂ of the bracket 30. Within this space, a substantially cylindrical housing 42 having a length corresponding to the width of the web portion of the bracket 30 and its lower side portion 42 ₁ is provided with the side link 4
Matches the upper side 41 ₁ of the upper part 41 of 0 and the upper side 42 ₂
Are spaced from the inner side 30 ₂₁ of the top portion 30 ₂ of the bracket 30 by at least a dimension corresponding to the radius of the tubular housing 42, which housing 42 of the connecting link 40. It is horizontally fixed to both side edge members of the upper side portion 41 ₁ of the upper portion 41 and to the web portion connecting them by suitable means, for example, welding. In addition, it is desirable that the height of the housing 42 does not protrude from at least the outer surface of the web portion of the connecting link 41. That is, the radius of the housing 42 is preferably smaller than the width of the side edge member of the sad link 40. The side link 40 has a pin shaft having a horizontal central axis YY having a length larger than its width inside the housing 42 in the upper portion 41. 43 is inserted, and the pin shaft 43 is rotatable around a horizontal axis Y-Y via a bearing 44 built in the housing 42.

Further, both the leg portions 30 ₁ of the upper portion of the bracket 30, the opening for facilitating positioning of the pin holder 33 is provided. Moreover, these leg portions 30 ₁ of the upper part, so as to accommodate the ends of the pin shaft 43 of the side links 40, the pin holder 33 of the pair has and a protrusion at approximately circular pipe, By inserting this protrusion into the opening provided in the bracket 33, the pin shaft 43 and the pin holder
33 and have the same central axis Y-Y,
Further, the pin holder 33 is attached to the bracket 42 by a suitable means, for example, welding, so as to contact each end of the housing 42.
Sticked to 30. In addition, one pin holder 33,
The spring pin 45 is inserted so as to be orthogonal to the central axis Y-Y of the pin shaft 43, thereby preventing the pin shaft 43 from slipping off and rotating.
Further, in order to make the insertion amount of the pin shaft 43 constant and easy, the stopper 46 is embossed on the leg portion 30 ₁ .

In this way, the side link 40 is rotatable with respect to the bracket 30 via the pin shaft 43. The lower end of the lower portion 45 of the side link 40 is pivotally attached to the rotary arm 11 (Fig. 4) of the vehicle tilt-opening / closing assist device.

The housing 42 can be made by forging or casting, in addition to being made of a pipe member.

The present invention has such a structure, and the bracket 30 is attached to the aluminum block tilting door 1 and the bracket 30.
Vertical concave portion 30 ₂₂ of 30, in the vicinity of the portion of the lower step 1 _0, by bolting through the bolt holes 31 and 32, the aluminum block tilt door 1, can be attached without a gap, the side The link 40 is rotated 180 ° with respect to the bracket 30 as the tilting door 1 turns.
When turning, attached to the side links 40, the housing 42 are mounted for pivoting pin shaft 43, the inner edges 30 ₂₁ of the top portion 30 ₂ of the bracket 30, the housing 42
It is housed inside the clearance formed between the and and does not hinder its turning.

In addition, in the connecting link mechanism according to the present invention having such a structure, the distance d between the rear surface of the main body of the bracket 30 and the outer surface of the web portion of the side link 40 is d.
(Fig. 2) can be about 18 mm in the design example shown in Figs. 9 and 10, and the corresponding dimension D in one design example according to the above invention D = about 30 mm (Fig. Ten
It can be seen that it can be significantly reduced compared to (Fig.).

Effect of the Invention Since the present invention has the above-described configuration and operation, the members constituting the “vehicle tilting door opening / closing assisting device” owned by the applicant, which has been devised previously, are particularly preferable. , The connection link is able to significantly reduce the size which occupies part of the width of the freight vehicle, and thus improves the internal volume of its bed.

[Brief description of drawings]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG.
A side view thereof, FIG. 3 is a plan view, FIG. 4 is a partially cutaway view showing one embodiment of the “vehicle tilting door opening / closing assisting device” previously devised, and FIG. 5 is a basic view thereof. Fig. 6 is a model diagram for explaining various mechanical relationships. Fig. 6 shows an example of the relationship between the rotation moment measured about the center of rotation of the tilting door and the opening angle of the tilting door when the tilting door is naturally opened. Diagram,
In order to explain the effect, FIG. 7 shows the restoring rotational moment about the rotation center of the tilting door generated by the device,
A diagram showing the relationship between the opening angle of the tilting door, FIG. 8 is a characteristic diagram of the first embodiment, FIG. 9 is a front view showing the first design example, and FIG. 10 is a cut thereof. It is a side view. 10 ...... Connection link mechanism, 30 ...... Bracket, 30 ₁ ...... Leg part, 30 ₂ ...... Top part, 30 ₂₁ ...... Inner side, 33 ...... Pin holder, 40 ...... Side link, 41 ₁ ...... Top side, 42 …… housing, 43 …… pin shaft, 44 …… bearing, 45 …… spring pin.

Claims (3)

[Scope of utility model registration request] 1. A connecting link (10) pivotally attached at one end to a part of the tilting door (1) and a rotary arm (11) at the other end.
One end of the rotary arm (11) is pivotally connected to the other end of the rotary arm (11) via the pivot (E), and the pull rod (13) is attached to a part of the rotary arm (11) at its one end. And the other end of the pull rod (13) is connected to an elastic body (15) installed on the vehicle, so that the elastic arm (15) is connected to the rotating arm (11) via the pull rod (13). A tilting door auxiliary opening / closing device for a vehicle configured to exert an elastic force,
A triangular link (12) is inserted between the rotating arm (11) and the pull rod (13), and the triangular link (12) is pivotally attached to a part of the rotating arm (11) at one apex (D) and the other apex ( In H), it is pivotally attached to one end of the pull rod (13), and the other vertex (I) of the triangular link (12) is hook-shaped, and this is pivoted (E) of the rotary arm (11).
In a vehicle tilting door opening and closing assisting device adapted to be engaged with, the connecting link (10) is attached to the tilting door (1) and has a "gate" -shaped planar contour. a bracket (30) consisting of vertical plates member has a width corresponding to the spacing between the bracket both vertical leg portion (30) (30 _1), the vertical plate member is a plan outline rectangular The side link (40) and the upper part (41) of the side link (40) are attached to the bracket (3
The horizontal pin shaft (43) is rotatably mounted at a distance from the inner side (30 ₂₁ ) of the top part (30 ₂ ) of (0), and each end of the pin shaft (43) is attached to the bracket (30). connecting link mechanism for the vehicle tilt door auxiliary switching device formed by sticking the respective both leg portions (30 _1). 2. A pin shaft (43) pivotably attached to an upper portion (41) of a side link (40) is provided inside a substantially tubular housing (42) fixed to the upper portion (41). The pin shaft (43) is housed and is rotatably supported by a bearing (44) built in the housing (42). Further, the pin shaft (43) has its ends at the bracket (31).
It is fixed to the bracket (30) so as not to be rotationally and axially displaceable by a spring pin (44) which is supported by each pin holder (33) formed in and which penetrates the pin holder (33) and the pin shaft (43). The connection link mechanism in the vehicle tilt-opening / closing assisting device according to claim 1. 3. The side link (40) has a channel-shaped cross section consisting of a pair of vertical side edge members and a web member interconnecting them. Alternatively, the connecting link mechanism in the vehicle tilt-opening / closing assisting device according to 2 above.