JPH0218785Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an opening/closing support device for a vehicle gate.

[Prior art]

In vehicles such as trucks that surround the loading platform with side gates, tailgates, etc. that are attached to the edge of the loading platform so as to be able to rotate vertically via hinges, this function is used to reduce the opening/closing load when opening and closing the gate. Some are equipped with a gate opening/closing support device.

However, as shown in Japanese Patent Application Laid-Open No. 57-158170 as an example of a gate opening/closing support device,
A plate-shaped or rod-shaped spring member whose inner end is fixed to the lower surface of the loading platform and whose outer end extends to the edge of the loading platform is assembled to the edge of the loading platform via a hinge so as to be rotatable in the vertical direction. There is an opening/closing support device for a vehicle gate that includes a link that is rotatably connected at one end to the outside of the attached gate and whose other end is rotatably connected to the outer end of the spring member.

In this type of opening/closing support device, the spring member is deflected according to the amount of vertical rotation during opening/closing work of the gate, and the upward torque caused by the reaction force of the spring member is increased or decreased according to the load of the gate. It is something that makes you This reduces the opening/closing load when opening/closing the gate.

[Problem that the invention attempts to solve]

However, in this type of opening/closing support device, the spring force applied to the gate is determined by the characteristics of the spring member and the link, and it is difficult to accurately set the spring force in accordance with the gate load. In addition, since the spring force cannot be adjusted, such an opening/closing support device is dedicated to a specific gate, and lacks versatility.

Accordingly, an object of the present invention is to address the above-mentioned problems by providing such an opening/closing support device with a spring force adjustment function.

[Means for solving problems]

The present invention provides this type of opening/closing support device.
a first bracket rotatably attached to the other end of the link; and a second bracket fixed to the outer end of the spring member and attached movably relative to the first bracket in the vertical direction. The present invention is characterized by comprising a bracket and a position adjustment means for moving the second bracket vertically relative to the first bracket.

[Functions and effects of the idea]

In the opening/closing support device having such a structure, when the second bracket is moved in the vertical direction relative to the first bracket by operating the position adjusting means, the amount of deflection of the spring member changes and the initial spring force thereof is adjusted. be done. Therefore, by operating the position adjustment means after assembling the support device to the cargo platform and the gate, the spring force of the spring member can be accurately set according to the load of the gate. Furthermore, since the spring force of the spring member can be adjusted arbitrarily, it is highly versatile and can be applied to various gates.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. FIG. 1 shows an opening/closing support device 10 according to the present invention.
It is shown. The support device 10 supports a side gate of a truck 20 shown in FIG.

In the truck 20, the lower edge of each side gate 22 is attached to the left and right edges of the loading platform 21 so as to be able to rotate in the vertical direction via a large number of hinges 23, and the center of the hinge 23 is attached to the side gate. 22
The rotation fulcrum _C1 is the rotational fulcrum of the Further, the lower end edge of the tailgate 24 is attached to the rear edge of the cargo platform 21 via a number of hinges (not shown) so as to be rotatable in the vertical direction. As a result, the periphery of the loading platform 21 is surrounded by raising each gate 22, 24, and the periphery is opened by rotating each gate 22, 24 downward and suspending it.

The main components of the opening/closing support device 10 are a leaf spring 11 which is a plate-shaped spring member, a link 12, first and second brackets 13 and 14, and an adjustment bolt 15 which is a position adjustment means.

The leaf spring 11 connects its inner end to the loading platform 21.
The link 12 is fixed to the lower surface of the side gate 22, and its outer end extends to the outer edge of the loading platform 21, and the link 12 can rotate its upper end to the outside of the side gate 22 at a position slightly above its rotational fulcrum _C1 . The outer end of the leaf spring 11 is connected to the outer end of the leaf spring 11 via both brackets 13 and 14. The center of the upper end assembly portion of the link 12 serves as a rotation fulcrum C ₂ of the upper end of the link 12 relative to the side gate 22 .

As shown in FIGS. 3a and 4, the first bracket 13 has a main body consisting of a rectangular main plate portion 13a and a pair of triangular arm portions 13b extending rearward from both sides of the main plate portion 13a by approximately 90 degrees. A pair of guide grooves 13c and 13d extending in parallel in the vertical direction are formed in the main plate portion 13a. Furthermore, an engagement piece 13e into which an adjustment bolt 15 (to be described later) is inserted and locked is protrudingly provided approximately at the center of the lower end of the main plate portion 13a, and collars 13f are provided in a bridging manner on both arm portions 13b. Fixed. In such a first bracket 13,
The lower end of the link 12 is rotatably connected by a connecting pin 16a inserted through the collar 13f,
The center of the connecting pin 16a serves as a pivot point _C3 of the lower end of the link 12 relative to the first bracket 13.

As shown in FIGS. 3b and 4, the second bracket 14 has a main body portion 1 bent in a U-shaped cross section.
4a and a plate-shaped lid 1 with one side thereof as a cover
4b, the upper part of the main body part 14a is provided with a nut 14c into which the adjustment bolt 15 is screwed and a pair of mounting holes 14d, and the lid body 14b is provided with a first
A pair of nuts 14e and 14f facing each guide groove 13c and 13d of the bracket 13 are provided. In the second bracket 14, a bolt 16 inserted into the mounting hole 14d of the main body 14a is inserted into the second bracket 14.
b, the outer end of the leaf spring 11 is fixed by a nut 16c.

These brackets 13 and 14 are connected to each guide groove 1.
They are assembled together by bolts 16d which are screwed into nuts 14e and 14f through nuts 3c and 13d so that they can move forward and backward, and by unscrewing and loosening each bolt 16d, the second bracket 14 is moved relative to the first bracket 13. It can move up and down along the guide grooves 13c and 13d. Further, the nut 14c of the second bracket 14 is connected to the first bracket 13.
An adjustment bolt 15 inserted through the engagement piece 13e of the bolt 15 is threadedly engaged with the second bracket 1 provided from the leaf spring 11.
It is locked to the engagement piece part 13e by the upward biasing force of 4.

In the opening/closing support device 10 configured in this manner, when the side gate 22 is rotated upward and is in the upright state as shown in FIG. 1, the spring force of the leaf spring 11 is at the initial setting value. When the side gate 22 in this state is rotated downward, the side gate 22 rotates around the rotation fulcrum C ₁ shown in FIGS. 1, 4, and 5, and the side gate 22 As a result of this rotation, the upper end of the link 12 is rotated around the rotation fulcrum _C2 relative to the side gate 22, and the lower end of the link 12 is rotated around the rotation fulcrum _C3 relative to the first bracket 22. Rotate. As a result, the leaf spring 11 is gradually bent by the load from the side gate 22, and the brackets 13 and 14 are moved downward through the position shown in FIG. 5 as shown by the two-dot chain line in FIG. Therefore, the rotation fulcrum C ₃ of the link 12
The side gate 22 is also moved downward, and the side gate 22 is rotated downward, passing through the position shown in FIG. 5, and suspended to the state shown by the two-dot chain line L in FIG. The gate load on the worker during the rotation process of the side gate 22 increases as the rotation angle of the gate 22 increases, reaches a maximum when the gate 22 rotates approximately 90 degrees, and then gradually decreases. The rotational force on the gate 22 due to the reaction force also increases or decreases substantially corresponding to the increase or decrease in the gate load. On the other hand, when the gate 22 is rotated upward to stand up, the process is reverse to the case where the gate 22 is rotated downward as described above. Therefore, the gate opening/closing load on the operator during rotation work of the gate 22 is reduced by the above-described rotation force on the gate 22.

Therefore, in the support device 10, when the bolts 16d that attach the brackets 13 and 14 to each other are loosened and the adjusting bolt 15 is rotated in the forward and reverse directions, the second bracket 14 can be moved forward and backward.
The first bracket 13 moves up and down along each guide groove 13c, 13d according to the direction of rotation of the first bracket 13. For example, when the adjustment bolt 15 is rotated in the forward direction, the second bracket 14 moves downward as shown by the two-dot chain line in FIG. 4, and when the bolt 15 is rotated in the reverse direction, the second bracket 14 moves upward. Therefore, since the initial deflection amount of the leaf spring 11 changes with the movement of the second bracket 14 and the initial spring force of the leaf spring 11 is adjusted, the spring force can be set accurately according to the load on the gate 22. I can do it. Further, in the support device 10, since the spring force of the leaf spring 11 can be arbitrarily adjusted, it is versatile and can be applied to various gates.

[Brief explanation of drawings]

1 is an enlarged cross-sectional view in the direction of the arrow in FIG. 2 of an opening/closing support device according to an embodiment of the present invention, FIG. 2 is a side view of a truck employing the same device, and FIG. Perspective view of the bracket, same figure b
5 is a perspective view of the second bracket, FIG. 4 is a vertical sectional side view showing the assembled state of both brackets, and FIG. 5 is a partial sectional view of the opening/closing support device during rotation of the side gate. Explanation of symbols, 10... Opening/closing support device, 11...
Leaf spring, 12... Link, 13, 14
... Bracket, 15 ... Adjustment bolt, 21 ...
Loading platform, 22... side gate, 23... hinge.

Claims (1)

[Scope of utility model registration request] A plate-shaped or rod-shaped spring member whose inner end is fixed to the lower surface of the loading platform and whose outer end extends to the edge of the loading platform is assembled to the edge of the loading platform via a hinge so as to be rotatable in the vertical direction. A vehicle gate opening/closing support device comprising a link having one end rotatably connected to the outside of the attached gate and the other end rotatably connected to the outer end of the spring member, wherein the link a first bracket rotatably attached to the other end; and a second bracket fixed to the outer end of the spring member and attached to the first bracket so as to be movable relative to the first bracket in the vertical direction. An opening/closing support device for a vehicle gate, comprising a position adjustment means for vertically moving the second bracket relative to the first bracket.