JPH05170024A - Hinge device of tilting type packing box for vehicle - Google Patents

Abstract

PURPOSE:To always assure an exact operation over a long period by preventing the wear between the hook member constituting this hinge device and the hitting surface of a stopper member and the coming off of the hook member, in the hinge device of a tilting type packing box for vehicle by which packing box loaded on the vehicle frame can be tilted selectively at least in right/left directions around the hinge axial line in both sides of this box. CONSTITUTION:The turning movement of a hook member 7 following the slant of a packing box V and the relative slide between this hook member 7 and the stopper member 18 for holding it on the lock position are prevented by matching the turning movement center of the hinge part of the box V with the turning movement center of the hook member 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilting type luggage box for a vehicle, wherein a luggage box mounted on a vehicle frame can be selectively tilted in at least two left and right directions around hinge axes on both sides of the luggage box. The present invention relates to a hinge device.

[0002]

2. Description of the Related Art A conventional hinge device is disclosed in Japanese Patent Laid-Open No. 58-58-58.
The one disclosed in Japanese Patent No. 56934 is well known.

[0003]

By the way, in this prior art, a hook member having a U-shaped engaging groove that opens upward is rotatably provided on the vehicle frame side, while the hook member is provided on the cargo box side. A hinge shaft that can be engaged with and disengaged from the engagement groove is provided, and the luggage box can be tilted about the hinge axis when the hinge shaft and the engagement groove are engaged with each other.

However, since the engaging groove of the hook member is opened upward in the hinge device as described above, there is a problem that earth and sand adhere to the groove to make it difficult to fit the hinge shaft.

Then, in order to solve such a problem, the practical use 3-
The one disclosed in Japanese Patent No. 68133 has been proposed, in which the engaging groove of the hook member faces downward so that sediment and the like do not adhere and accumulate, but the hook member hinges as the load box tilts. Since it rotates around the axis, relative sliding occurs between the hook member and the stopper each time the load box tilts,
High processing accuracy is required for the sliding surface between them, and the selection of materials for them also increases the cost, and the sliding of both members due to the above-mentioned sliding ensures smooth rotation of the hook. There is a problem in that it may interfere with the operation and eventually cause the hook to come off.

The present invention has been made in view of the above situation, and the rotation center of the luggage box and the rotation center of the hook member are made to coincide with each other, whereby the rotation of the hook member due to the tilting of the luggage box is performed. It is an object of the present invention to provide a novel hinge device for a tilting luggage box for vehicles, which is capable of preventing and solving the above-mentioned problems.

[0007]

To achieve the above object, the present invention is characterized in that a luggage box mounted on a vehicle frame is selectively moved around at least two left and right directions around hinge axes on both sides of the luggage box. A hinge device for a tilting load box for a vehicle, which is capable of being tilted in a vertical direction, wherein a hinge shaft is provided concentrically with the hinge axis on an upper bracket fixed to lower left and right sides of the load box. And a hook member having a downward hook groove is rotatably supported, while upper brackets of the upper and lower bearing grooves capable of removably receiving the hinge shaft are attached to lower brackets provided on both sides of the vehicle frame. A locking shaft that can be engaged with and disengaged from the hook groove is provided, and a stopper member that can engage with the hook member is rotatably supported, and an operation mechanism is connected to the stopper member.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the luggage box on the vehicle frame is placed on both left and right sides,
FIG. 1 is a rear view of the three-stage dump vehicle when the device of the present invention is applied to a so-called three-stage dump vehicle that is capable of tilting backward, and FIG. In Fig. 1, a cargo box V is mounted on the vehicle frame F of the three-wheeled dump vehicle, and the cargo box V is detachably hinged to the vehicle frame F at the front and rear portions on the left and right sides between the cargo box V and the vehicle frame F. Link,
A left and right pair of front hinge mechanism H _F and rear hinge mechanism H _R are provided.

A tilting cylinder is provided between the vehicle frame F and the intermediate portion of the packing box V.
Da C_DAre connected to each other, and each of the pair of front hinges is connected.
Mechanism H_F, And rear hinge mechanism H_ROf the left side
Front and rear hinge mechanism H_F, H_RLocked
And unlock them on the right side to
Tilt cylinder C_DIf the extension operation of the
You can tilt to the left as shown, and
And rear hinge mechanism H _F, H_RLeft, right lock, Ann
The tilt cylinder C is operated by operating the locked state in the opposite direction to the above._DStretch
With a long operation, the packing box V can be tilted to the right.
Left and right rear hinge mechanism H_RBoth are locked.
Left and right front hinge mechanism H_FBoth are unlocked
Tilting cylinder C_DIf you extend the
The V can be tilted backwards.

FIG. 2 shows a rear hinge mechanism H when the cargo box is laid down.
₂ is a sectional view of the rear hinge mechanism H _{R taken} along line 3-3 in FIG. 2, and FIG. 4 is a sectional view of the rear hinge mechanism HR shown in FIG.
Partial side view taken along line 4-4 of FIG. 2, FIG. 5, partially enlarged view of FIG. 2, FIG. 6 is a Riyahinji mechanism H _R during packing box tilted rearward side view, FIG. 7 is Nibako Fuku倒a rear side view of the previous Riyahinji mechanism H _R, 1 in the following, the structure of Riyahinji mechanism H _R of first packing box V by referring also to FIG 2-7.

A pair of bracket pieces 3 ₁ and 3 _{1 which} are parallel to each other are provided on the left and right sides of the cross beam 2 below the floor plate 1 of the packing box V, respectively.
The upper hawk-shaped bracket 3 is welded downward. A hinge shaft 4 made of a bolt is horizontally extended through the middle portion of the upper bracket 3, and a nut 6 is attached to an end portion of the hinge shaft 4 via a collar 5 fitted therein.
When the hinge shaft 4 is screwed onto the upper bracket 3
The head 4 ₁ of the hinge shaft 4 and the collar 5 have substantially the same outer diameter.

A hook member 7 is rotatably supported at the center of the hinge shaft 4. A downward hook groove 8 is formed in the lower portion of the hook member 7, and a lock confirmation projection 9 that can be engaged with a stopper member 18 described later is formed on the back surface thereof.
Are projected integrally.

A return spring 11 composed of a tension coil spring is stretched between the arm piece 10 at the upper base end of the hook member 7 and the upper bracket 3, and the tension force of the return spring 11 is the hook. 2 and 5, the member 7 is biased to rotate counterclockwise until it abuts the stopper pin 12 provided on the upper bracket 3.

On the rear support member 13 on the vehicle frame F, a rotary support shaft 14 is laid horizontally so as to be rotatable around its axis l-l, and the upper side is provided at both ends of the rotary support shaft 14. A lower bracket 15 is integrally provided corresponding to the bracket 3 (FIG. 1). The lower bracket 15 is composed of a pair of left and right bracket pieces 15 ₁ and 15 _{1 which} are parallel to each other.
The upper side thereof has a U-shaped bearing groove 16, 16 that is open upward.
There are formed, on the bearing grooves 16 and 16, a color 5 fitted on the head 4 ₁ and that end of the hinge shaft 4 is engaged detachably engaged, as shown in FIG.

A locking shaft 17 is integrally laterally fixed to the outer end of the lower bracket 15 in the vicinity of the bearing groove 16 and has a small diameter formed in the center of the locking shaft 17. The hook groove 8 of the hook member 7 is removably engaged with the locking portion 17 ₁ . Further, a stopper shaft 20 is laterally fixed to the lower portion of the lower bracket 15, and the stopper shaft 2
0 engages with a stopper member 18 to be described later to regulate the lock position thereof.

As shown in FIGS. 2 and 4, the lower bracket 15
A bell crank-shaped stopper member 18 is provided at the base of the pivot 1
It is rotatably supported vertically by holding 9
The front end surface of the hook member 18 is engaged with the protrusion 9 of the hook member 7.
Mating engagement surface 18₁Are formed. Also stopper
At the lower end of the member 18, a remote control link mechanism R described later is provided. _L
The cross rod 40 (see FIG. 9) is the pin connection 40.₁Is this
The stopper member 18 is moved by the movement of the cross rod 40 of
The lock position shown in the solid line position in Fig. 4 and the chain position in the figure
The rocking operation is performed between the unlock positions shown.

FIG. 8 shows a sectional view of the front hinge mechanism H _F when the load box is laid down.

In the rear hinge mechanism H _R , a lower bracket 15 thereof is fixed to an end portion of a rotary support shaft 14 which is rotatably supported by a rear support member 13, and the rotary support shaft 14 is attached.
While the front hinge mechanism H _F can rotate about its axis l-l, the rear hinge mechanism H _F is that the lower bracket 15 is integrally fixed to the end of the front support member 21 with a bolt 22. only it differs from the _R, since other configurations are the same as Riyahinji mechanism H _R omitted.

As shown in FIGS. 1, 2, 4, 6 and 8, the hinge piece 2 at the lower edge of the side door 24 is located before and after the lower edge of the side portion of the packing box V.
5 is pivotally supported up and down by a hinge pin 26,
The side door 24 can be opened and closed around a hinge pin 26.
Below the side door 24, the bracket 31 protruding from the lower edge of the side of the luggage box V is provided with a door opening restriction member 27 so as to cover the outside of the rear and front hinge mechanisms H _R and H _F.
Is suspended by a support pin 32 so as to be swingable. The regulation member 27 includes a regulation body 28 having a U-shaped cross section, a stopper piece 29 projecting inward from the inner surface of the regulation body 28, and a rubber material or the like fixed to the outer surface of the regulation body 28. And a cushion 30. The inner surface of the regulation body 28 has an inclined cam surface 2 that slopes downward from the upper portion to the lower portion.
8 ₁ is formed in this inclined cam surface 28 ₁ to face the both end outer peripheral surface of the locking shaft 17, may abut on the outer circumferential surface Fushimi倒時the packing box V. As shown in FIGS. 2 and 7, the stopper piece 29 comes into contact with the outer surface of the upper bracket 3 to regulate the hanging position of the regulation member 27 when the cargo box V is laid down. Further, the cushion member 30 is a side door 24
At the time of opening, the opening position can be regulated by cushioning against the outer surface of the. The door opening / closing regulation member 2
A tension spring 33 is stretched between the girder 7 and the cross girder 2 of the packing box V,
The pulling force of the tension spring 33 urges the door opening / closing restriction member 27 to rotate counterclockwise, and the inclined cam surface 28 ₁ of the lock shaft 17 is rotated around the both ends of the locking shaft 17 as shown in FIGS. When the luggage box V is tilted, the side door 24 that is opened is regulated so as to swing outwardly, that is, away from the wheel W (FIG. 1). Note that Fe is a fender.

The pair of front and rear hinge mechanisms H _F and H _R are locked or unlocked via a remote control link mechanism R _L by rocking operation of an operating lever L _V provided in a driver's cab C _A (FIG. 1). The lock operation is possible, and the structure of this mechanism R _L will be described below with reference to FIGS.
This will be described with reference to (b).

FIG. 9 shows a remote control link mechanism R._LPerspective view of
10 (a) and 10 (b) show the mechanism R. _LSome enlarged planes of
It is a figure.

A pair of front and rear bell cranks 35, 36 are provided rotatably around the vertical axis vv at the front and rear of the central portion of the vehicle frame F, and one swing arm 35 of the front bell crank 35 is provided. ₁ and one swing arm 36 ₁ of the rear bell crank 36 are pin-connected via a transmission rod 37,
The front and rear bell cranks 35 and 36 can be rotated in synchronization with each other. The other swing arm 35 ₂ of the front bell crank 35 is provided with the stopper members 18 of the left and right front hinge mechanisms H _F , H _F via front left and right cross rods 38, 39 extending to the left and right sides. , 18 lower end is pin-connected 38 _1, 39 ₁ of, and the other of the swing arm 36 ₂ of the rear bell crank 36, rear left, right cross rods 40 which extend on both sides through a differential coupling portion 44, 41, and the outer ends of the rear left and right cross rods 40, 41 are connected to the lower ends of the stopper members 18, 18 of the left and right rear hinge mechanisms H _R , H _R by pin connections 40 ₁ , 41, respectively.
₁ has been.

The differential connecting portion 44 is shown in FIG.
As clearly shown in (b), the second swinging arm 36 ₂ triangular rear bell crank 36, a pair of inclined length is formed in V-shape so as to approach each other toward the outside to the inside The inclined long holes 45, 46 are provided at the inner ends of the holes 45, 46 and the pair of left and right rear cross rods 40, 41.
The connecting pieces 47 and 48 slidably fitted to the connecting member 46, and the restricting piece 49 fixed to the vehicle frame F to restrict the movement of the pair of connecting pins 47 and 48.
Are parallel surfaces 50 ₁ and 50 ₁ parallel to each other on both sides,
A regulation cam surface 50 formed of an arcuate surface 50 ₂ centered on the axis vv is formed at the tip thereof. And Figure 1
When the differential connecting portion 44 is in the neutral position as shown in 0 (a), the connecting pins 47 and 48 are in contact with the boundary edge portion between the parallel surfaces 50 ₁ and 50 ₁ and the arcuate surface 50 ₂ .

In the operator's cab C _A (FIG. 1), there are provided operation levers L _V which can be switched between three positions (A), (B) and (C), respectively, and are integrated with the operation levers L _V. The tip of the operation arm 51 is connected to _one swing arm 35 ₁ of the front bell crank 35 via a push-pull cable 52 provided along the vehicle frame F.

As shown by the solid line position in FIG. 9, when the operating lever L _V is in the (B) position, the pair of left and right rear hinge mechanisms H _R , H _R are both locked to the hook member 7. In the locked state where the shaft 17 is engaged, and the left side,
The right front hinge mechanism H _F , H _F is in an unlocked state in which the hook member 7 is disengaged from the lock pin 17, and if the tilting cylinder C _D (FIG. 1) is extended from this state, the cargo box V is rotated. The support shaft 14 can be tilted rearward about the axis line l-l.

Further, in FIG. 9, when the operation lever L _V is swung to the (C) position, the transmission rod 37 is pulled forward through the push-pull cable 52 as shown by the solid line arrow in the figure. Front and rear bell cranks 35 and 3
6 is rotated clockwise, and the front left and right cross rods 3
Both 8 and 39 move to the left so that the left front hinge mechanism H _F is locked and the right front hinge mechanism H _F is unlocked.

On the other hand, the left rear hinge mechanism H _R holds the locked state, whereas the right rear hinge mechanism H _R is unlocked by pulling the cross rod 41 leftward.
That is, as the transmission rod 37 moves forward, the rear bell crank 36 is swung in the clockwise direction as shown in FIG. 10B, and the right cross rod 41 moves to the left via the slender elongated hole 46 and the connecting pin 48. On the other hand, the left cross rod 40 rolls on the parallel surface 50 ₁ of the regulation cam surface 50 of the regulation piece 49 while the coupling pin 47 slides in the slanted long hole 45, while the left cross rod 40 moves in the axial direction. Movement is suppressed. Therefore, the right rear hinge mechanism H _R is unlocked, while the left rear hinge mechanism H _R is still held in the locked state.
_F, H _R to are both locked ones left, also any those right becomes unlocked, if extended operating the tilt cylinder C _D From this state, the packing boxes V as shown in FIG. 1 Can tilt to the left.

Further, if the operating lever L _V is swung to the (A) position in FIG. 8, the transmission rod 37, the front left and right cross rods 3 are reversed, contrary to the case where the operating lever is swung to the (C) position.
8, 39, and the rear left cross rod 40 move in the direction of the dotted arrow to move the front and rear hinge mechanisms H _F , H.
_With respect to _R , the right one is in a locked state and the left one is in an unlocked state, and by extending the tilt cylinder C _D from this state, the load box V can be tilted to the right.

By the way, front and rear hinge mechanism H
_F, H _R is, in the locked state, when acting as a hinge portion upon tilting of crates V A stopper member 18 is in the locked position as shown in solid line in Figure 2 and 5, the front end engagement surface 18 ₁ is engaged to the hook member 7 facing the rear with a projection 9 of the hook member 7 is not rotated to the unlocked position, upon tilting of the packing box V,該荷box V 6 tilts while extending the return spring 11 about the pivotal support portion of the hook member 7, that is, the hinge shaft 4, as shown in FIG. 6, and the hook member 7 does not swing, so the hook groove of the hook member 7 There is no relative displacement between 8 and the locking shaft 17,
The hook member 7, the locking shaft 17, and the stopper member 18 do not wear.

When the stopper member 18 is swung to the unlock position as shown by the chain line in FIG. 5, the front and rear hinge mechanisms H _F and H _R are unlocked,
The hook member 7 is rotated by the elastic force of the return spring 11 until it hits the stopper pin 12, and the hook member 7 is disengaged from the locking shaft 17 as the load box V is tilted. When the luggage box V is lowered from the tilted position and installed again on the vehicle frame F, the hook groove 8 of the hook member 7 is engaged with the locking shaft 17.

By the way, as shown in FIG. 7, immediately before the packing box V descends as shown by the white arrow and is installed on the vehicle frame F, the hook groove 8 is clogged with earth and sand or the like and the hook of the hook member 7 is hooked. When the groove 8 cannot be securely engaged with the locking shaft 17, the engaging surface 18 ₁ of the stopper member 18 is not
By engaging with the protrusion 9 on the back surface, the stopper member 18 cannot be swung to the lock position, and the operator can be notified that the engagement is insufficient.

In the above embodiment, the case where the present invention is applied to the triple transfer dump truck has been described, but it is needless to say that the present invention can be applied to a side dump truck in which the luggage box can be tilted to the left and right sides. In addition, the present invention can be applied to other vehicles such as railway vehicles in addition to automobiles.

Further, another known operation mechanism may be adopted instead of the remote operation link mechanism.

[0035]

As described above, according to the present invention, in a hinge device for a tilting type cargo box for a vehicle, a hinge shaft is concentric with a hinge axis of the cargo box in brackets fixed to both lower parts of the cargo box. A hook member, which is provided and has a downward hook groove, is rotatably rotatably supported, and upper brackets provided on both sides of the vehicle frame have upward bearing grooves and the hook member that removably receive the hinge shaft. Since a locking shaft that can be engaged with and disengaged from the hook groove of the hook member is provided, a stopper member that can be engaged with the hook member is rotatably supported, and the stopper member is connected to the operation system. Even if the box is tilted, the rotation of the hook member is suppressed, so that the hook member and the stopper member do not slide relative to each other, wear of these both members and disengagement of the hook member are prevented, and the hook member is kept accurate for a long time. Na product It is possible to guarantee.

Further, since there is no relative sliding between the hook member and the stopper member, it is not necessary to finish the sliding surfaces of these members with high precision as compared with the conventional one, and the manufacturing cost thereof can be reduced. it can.

[Brief description of drawings]

FIG. 1 is a rear view of a three-wheeled dump vehicle when the load box is tilted to one side.

FIG. 2 is a rear hinge mechanism 2-2 of FIG.
Sectional view along the line

FIG. 3 is a sectional view of the rear hinge mechanism taken along line 3-3 in FIG.

FIG. 4 is a partial side view taken along line 4-4 of FIG.

5 is a partially enlarged view of FIG.

FIG. 6 is a rear side view of the rear hinge mechanism when the luggage box is tilted.

FIG. 7 is a rear side view of the rear hinge mechanism immediately before the load box is laid down.

FIG. 8 is a sectional view of the front hinge mechanism when the load box is laid down.

FIG. 9 is a perspective view of a remote control link mechanism.

10A and 10B are enlarged plan views of a part of the remote control link mechanism.

[Explanation of symbols]

 3 Upper Bracket 4 Hinge Shaft 7 Hook Member 8 Hook Groove 15 Lower Bracket 16 Bearing Groove 17 Locking Shaft 18 Stopper Member F Car Frame V Packing Box

Claims (1)

[Claims] 1. A packing box (V) mounted on a vehicle frame (F).
So that it can be selectively tilted in at least two left and right directions around the hinge axis on both sides of the packing box (V),
A hinge device for a tilting cargo box for a vehicle, wherein an upper bracket (3) fixed to lower left and right sides of the cargo box (V).
Is provided with a hinge shaft (4) concentrically with the hinge axis, and a hook member (7) having a downward hook groove (8) is rotatably supported on one side of the vehicle frame (F). An upper bearing groove (16) capable of removably receiving the hinge shaft (4) in the lower bracket (15) provided.
And a stopper member (18) which can be engaged with the hook groove (8) of the hook member (7) and which is engageable with and disengageably engaged with the hook member (7). A hinge device for a tilting luggage box for a vehicle, which is freely pivotally supported and an operating mechanism ( _RL ) is connected to the stopper member (18).