JP2534656Y2 - Side-floor door support device for dump vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side door support device for a dump truck in which a packing box mounted on a vehicle frame can be selectively tilted at least to the left and right sides.

[0002]

2. Description of the Related Art In a conventional dump truck, the upper end of a side door of a packing box is pivotally connected to an upper edge of the packing box (Japanese Utility Model Laid-Open No. 3-68133, Japanese Patent Laid-Open No. 55-1217,
See JP-B-63-37732.

[0003]

By the way, in the above-mentioned dump truck, in order to use the side door as a guide plate at the time of discharging a load such as earth and sand due to the tilting of the packing box, the upper end of the side door is loaded. When pivotally connected to the lower edge of the box, when the cargo box is tilted, not only may the fully opened side door interfere with the fenders etc. that cover the wheels, but also the discharged load may fall near the wheels and cause the wheels to fall. There are problems such as damage and hindrance to running of the vehicle.

[0004] Therefore, the present invention makes it possible to tilt the fully opened side door to the outside of the packing box with the tilting of the packing box so that the side door does not interfere with the fender and discharge. It is an object of the present invention to provide a side-floor door support device for a new dump vehicle capable of dropping earth and sand away from the vehicle.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is characterized by a dumping vehicle in which a packing box mounted on a vehicle frame can be selectively tilted at least to both left and right sides. , On the left and right lower edges of the packing box,
The side door is pivotally connected so as to be openable and closable, and at the time of opening the side door, a movable regulating member capable of abutting against an outer surface thereof is swingably suspended. Sometimes, a fixed regulating member that can be engaged with the movable regulating member is provided, and one of the mutually engaging surfaces of the movable and fixed regulating members regulates the swing of the movable regulating member accompanying the tilting of the packing box. Thus, a cam surface for tilting the side fan door outward is formed.

[0006]

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

[0007] In this embodiment, the packing box on the vehicle frame is
FIG. 1 is a rear view of a tri-rotation dump vehicle when the present invention is applied to a so-called tri-rotation dump vehicle that is capable of tilting backward. In FIG. 1, a packing box V is mounted on the frame F of the three-turn dump vehicle, and the left and right front and rear portions between the packing box V and the frame F are hinged so that the packing box V can be detachably engaged with the frame F. connect,
Each pair of left and right front hinge mechanism H _F and Riyahinji mechanism H _R is provided.

[0008] tilt cylinder C _D is between the middle portion of the vehicle frame F and crates V is coupled, each pair of front hinge mechanism H _F, and among Riyahinji mechanism H _R, the left front and Riyahinji mechanism H _F, the H _R in a locked state and to manipulate their right unlocked, if extended operating the tilt cylinder C _D, it can be tilted to the left to indicate a load box V in FIG. 1 and front and Riyahinji mechanism H _F, left H _R, right lock, if extended operating the tilt cylinder C _D by operating the unlock state to the foregoing opposite, it is possible to tilt the crates V to the right further left, or left to right Riyahinji mechanism H _R in both the locked state, if extended operating the tilt cylinder C _D by operating both of the front right hinge mechanism H _F unlocked, the crates V rearward Tilting It can be.

FIG. 2 shows the rear hinge mechanism H when the packing box is turned over.
Of _R, cross-sectional view taken along line 2-2 in FIG. 3, FIG. 3, the Riyahinji mechanism H _R, sectional view taken along line 3-3 in FIG. 2, FIG. 4,
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 , 3 ₁ parallel to each other are provided on both left and right sides of the cross beam 2 under the floor plate 1 of the packing box V, respectively.
The upper fork-shaped upper bracket 3 is welded downward. A hinge shaft 4 made of a bolt is passed through the middle portion of the upper bracket 3, and a nut 6 is attached to an end of the hinge shaft 4 via a collar 5 fitted thereto.
Is screwed so that the hinge shaft 4 is connected to the upper bracket 3.
Is secured to, the head 4 ₁ and collar 5 of the hinge shaft 4, the outer diameter is substantially the same.

A hook member 7 is rotatably supported at the center of the hinge shaft 4. A lower hook groove 8 is formed at a lower portion of the hook member 7, and a lock confirmation projection 9 which can be engaged with a stopper member 18 described later is formed on the back surface thereof.
Are protruded 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 of the return spring 11 is 2 and 5, the member 7 is biased to rotate counterclockwise until it hits a stopper pin 12 provided on the upper bracket 3.

A turning support shaft 14 is mounted on a rear support member 13 on the vehicle frame F so as to be rotatable around its axis l-l. The lower bracket 15 is provided integrally with the bracket 3 (FIG. 1). The lower bracket 15 is composed of a pair of left and right bracket pieces 15 ₁ , 15 ₁ parallel to each other.
On its upper side, U-shaped bearing grooves 16, 16 open upward are provided.
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 and horizontally fixed to the outer end of the lower bracket 15 in the vicinity of the bearing groove 16. the engaging portion 17 _1, hook groove 8 of the hook member 7 is engaged detachably engaged. Also this engaging shaft 17 is also used as a fixed regulating member engageable with _first inclined cam surfaces 28 of the movable restricting member 27 described later. Further, a stopper shaft 20 is horizontally fixed to a lower portion of the lower bracket 15.
Numeral 0 engages with a stopper member 18 described later to regulate the lock position.

As shown in FIGS.
A bell crank-shaped stopper member 18 is provided at the base of the pivot 1.
9 with a rotatably pivotally supported in the vertical direction, the front end surface of the stopper member 18, the projections 9 and the engagement surface 18 ₁ to engage the hook member 7 is formed. Further, a lower end of the stopper member 18 has a remote control link mechanism _RL described later.
Cross rods 40 (FIG. 9) is a pin connected 40 _1, the stopper member 18 by the movement of the cross rod 40,
The swing operation is performed between the lock position shown by the solid line position in FIG. 4 and the unlock position shown by the chain line position in FIG.

[0016] FIG. 8 is a sectional view of a front hinge mechanism H _F of crates Fushimi倒時is shown.

The rear hinge mechanism H _R has a lower bracket 15 fixed to an end of a rotation support shaft 14 rotatably supported by a rear support member 13.
With respect to the pivotable on its axis l-l around the front hinge mechanism H _F is Riyahinji mechanism H in that it is integrally fixed with a bolt 22 to an end portion of the lower bracket 15 front support member 21 _R, and other configurations are the same as those of the rear hinge mechanism H _R, and therefore description thereof is omitted.

As shown in FIGS. 1, 2, 4, 6 and 8, before and after the lower edge of the side of the packing box V, a hinge piece 2 at the lower edge of the side door 24 is provided.
5 is pivotally supported by a hinge pin 26 so as to be rotatable up and down,
The side door 24 can be opened and closed around a hinge pin 26.
Below the side Aoto 24, the bracket 31 projecting from the side lower edge of the packing box V, the movable restricting member 27 covering the outside of the rear and front hinge mechanism H _R, H _F as shown in FIG. 4 It is suspended swingably with the support pin 32.
The movable regulating member 27 includes a regulating body 28 having a U-shaped cross section.
And a stopper piece 29 protruding inward from the inner surface of the regulating body 28, and a cushion 30 made of rubber or the like, which is fixed to the outer surface of the regulating body 28. The inner surface of the regulating body 28 is formed in the inclined cam surfaces 28 ₁ a descending slope towards the bottom from the top, the inclined cam surfaces 2
8 ₁ facing the both end outer peripheral surface of the locking shaft or fixed regulating member 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 abuts on the outer side surface of the upper bracket 3 when the cargo box V falls down, and the suspension position of the movable regulating member 27 is regulated. Further, the cushion member 30 can abut against the outer surface of the side door 24 when the side door 24 is opened so as to regulate its open position. The movable regulating member 27 and the horizontal girder 2 of the packing box V
A tension spring 33 is stretched between them, and the tension force of the tension spring 33 urges the movable regulating member 27 to rotate in the counterclockwise direction, and as shown in FIGS. 28 ₁
Are pressed against the outer peripheral surfaces of both ends of the fixing restricting member 17, and when the packing box V is tilted, the opened side door 24 is restricted so as to swing outward, that is, away from the wheel W (FIG. 1). Note that Fe is a fender.

The lock said pair of front and Riyahinji mechanism H _F and H _R, via a remote control link mechanism R _L by swinging operation of the cab C _A lever provided (FIG. 1) L _V or Anne, Locking operation is possible. Hereinafter, the structure of this mechanism _RL will be described with reference to FIGS.
This will be described with reference to (b).

FIG. 9 is a perspective view of the remote control link mechanism _RL .
FIGS. 10A and 10B are enlarged plan views of a part of the mechanism _RL .

A pair of front and rear bell cranks 35 and 36 are provided rotatably around a vertical axis v-v at the front and rear of the center of the vehicle frame F, and one swing arm 35 of the front bell crank 35 is provided. _1, the one swinging arm 36 ₁ of the rear bell crank 36, is pin-connected via a transmission rod 37,
The front and rear bell cranks 35 and 36 can be rotated in synchronization. Also the other swing arm 35 ₂ of the front bell crank 35 the left through the front left, right cross rods 38 and 39 extending in the left and right both sides, right front hinge mechanism H _F, the H _F stopper member 18 , 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, is connected to the inner end of the 41, also the rear left, the outer end the left-right cross rods 40 and 41, right Riyahinji mechanism H _R, respectively to the lower end pin connection 40 ₁ of the stopper member 18, 18 of the H _R, 41
_Has been one.

The differential connection section 44 is provided 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 Holes 45, 46 are provided at the inner ends of the pair of rear left and right cross rods 40, 41, respectively.
The connecting pins 47 and 48 are slidably fitted to the frame 46, and the restricting pieces 49 are fixed to the vehicle frame F and restrict the movement of the pair of connecting pins 47 and 48.
Is its parallel surface parallel to each other on both sides 50 _1, 50 _1,
The arcuate surface 50 ₂ become more restricting cam surface 50 about the axis v-v is formed at its tip. And FIG.
0 When the differential coupling part 44 as shown in (b) is in the neutral position, the connecting pin 47 is in contact with the terminal edge of the parallel surfaces 50 _1, 50 ₁ and the circular arc surface 50 _2.

[0023] In the cab C _A (FIG. 1), three positions (A), (B) and (C) respectively switchable lever L _V is provided at a position, integral with the operating lever L _V The tip of the operation arm 51 is connected to _one swing arm 351 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 position (B), the pair of the left and right Riyahinji mechanism H _R, H _R are all hook member 7 and the locking In a locked state in which the shaft 17 is engaged,
Right front hinge mechanism H _F, H _F is in the unlocked state where the hook member 7 is disengaged from the locking pin 17, turning the crates V if extended operating the tilt cylinder C _D (FIG. 1) from this state The support shaft 14 can be tilted rearward around the axis l-l.

Further, in FIG. 9, when pivoting the operating lever L _V in (C) position, the transmission rod 37 through the push-pull cable 52 as shown in FIG solid arrow is pulled forward Front and rear bell crank 35,3
6 is rotated clockwise, and the front left and right cross rods 3
8 and 39 are all moved to the locked state left front hinge mechanism H _F to the left, also the right front hinge mechanism H _F becomes unlocked.

On the other hand, while the left rear hinge mechanism H _R maintains the locked state, the right rear hinge mechanism H _R is unlocked by the cross rod 41 being pulled leftward.
That is, with the forward movement of the transmission rod 37, the rear bell crank 36 is swung clockwise as shown in FIG. 10B, and the right cross rod 41 is moved leftward through the oblong slot 46 and the connecting pin 48. left cross rod 40 while being towed towards the connecting pin 47 is axially rolling parallel faces 50 ₁ above the regulating cam surface 50 of the regulating piece 49 while sliding in the inclined slot 45 Movement is suppressed. Therefore, while the right rear hinge mechanism H _R is in the unlocked state, the left rear hinge mechanism H _R is still kept in the locked state, and the front and rear hinge mechanisms H _R are kept.
_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 be tilted to the left.

[0027] ask further swinging the operating lever L _V in (A) position in FIG. 8, the (C) if swings opposite the transmission rod 37 in position, the front left, right cross rod 3
8, 39, and the rear left cross rod 40 move in the direction of the dotted arrows to form the front and rear hinge mechanisms H _F , H
_R is the locked state that the right, those on the left side is unlocked, if extended operating the tilt cylinder C _D From this state, it is possible to tilt the crates V on the right.

The 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, the return spring 11 is extended and tilted around the pivot portion of the hook member 7, ie, the hinge shaft 4, as shown in FIG. 6, and the hook member 7 does not swing. There is no relative displacement between 8 and the locking shaft 17.

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

Immediately before the packing box V is lowered as indicated by the white arrow and is set on the vehicle frame F as shown in FIG. when the groove 8 is unable to reliably engage the locking shaft 17, the engagement surface 18 ₁ of the stopper member 18, the hook member 7
Engagement with the projection 9 on the back surface makes it impossible for the stopper member 18 to swing to the locked position, and informs the operator that engagement is insufficient.

By the way, before tilting the packing box V, the tilting side door 24 is fully opened beforehand around the hinge pin 26. At this time, the side tilting door 24 has its outer surface as shown by a chain line in FIG. Is abutted against the cushion 30.

Next, as shown in FIG.
When tilting around the side Aoto 24 and the movable regulating member 27 is inclined cam surfaces 28 ₁ swings inwardly together are locking shaft, Nachi Suwa both end outer peripheral surface of the stationary regulating member 17 engage a movable regulating member 27 by tilting the subsequent Nibako V is while moving the inclined cam surfaces 28 ₁ on the fixed regulating member 17,
The swing is restricted, and the side door 24 is inclined in a direction away from the wheel W. Therefore, the side fan door 24 is
Does not interfere with the fender Fe even when it is inclined, and the load such as earth and sand of the packing box V can be dropped to a position away from the vehicle outer surface while being guided by the side door 24, and as a result, the fender Fe And prevent damage to the wheels W, and the dropped load does not hinder the running of the vehicle.

In the above embodiment, the case where the present invention is applied to a three-turn dump vehicle has been described. However, it is needless to say that the present invention can be applied to a side dump vehicle in which the packing box can be tilted to the left and right sides. .

In the above embodiment, the fixing regulating member is also used as the locking shaft. However, it may be provided separately, or may be used as another member. Further, the hinge device of the packing box may be a conventionally known one in addition to the above embodiment.

[0035]

As described above, according to the present invention, in a dump truck, side doors are pivotally connected to the lower edges on both left and right sides of the packing box so as to be openable and closable, and when the side doors are opened, they are connected to the outer surface. A movable restricting member that can be abutted is swingably suspended, and a fixed restricting member that can be engaged with the movable restricting member when the packing box is tilted is provided on both left and right sides of the vehicle frame. A cam surface for restricting the swing of the movable regulating member accompanying the tilting of the packing box and tilting the side fan door outward is formed on one of the mutually engaging surfaces of the packing box. When tilting, the open side door does not interfere with the fender that covers the wheels, the fender can be protected, and the side door guides the load to a position away from the outer side of the vehicle. Not only will the wheels not be damaged, It has never hinder the line.

[Brief description of the drawings]

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

FIG. 2 is a view showing a rear hinge mechanism when the cargo box is turned over, FIG.
Sectional view along the line

FIG. 3 is a sectional view of the rear hinge mechanism taken along line 3-3 in FIG. 2;

FIG. 4 is a partial side view taken along line 4-4 in FIG. 2;

FIG. 5 is a partially enlarged view of FIG. 2;

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

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

FIG. 8 is a cross-sectional view of the front hinge mechanism when the cargo box is folded down.

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

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

[Explanation of symbols]

17 Fixed regulating member 24 Side door 27 Movable regulating member 28 ₁ Cam surface F Car frame V Packing box

Claims (1)

(57) [Scope of request for utility model registration] 1. A packing box (V) mounted on a vehicle frame (F)
, Which can be selectively tilted at least to the left and right sides, a side fan door (24) is pivotably connected to the lower edges on both left and right sides of the packing box (V) so as to be openable and closable, and When the door (24) is opened, a movable regulating member (27) that can abut against the outer surface of the door (24) is swingably suspended, while the movable box (V) is tilted on both left and right sides of the vehicle frame (F) when the packing box (V) is tilted. Fixed regulating member (17) that can engage with regulating member (27)
Is provided on one of the mutually engaging surfaces of the movable and fixed restricting members (27, 17) to restrict the swing of the movable restricting member (27) accompanying the tilting of the packing box (V). A cam surface (28 ₁ ) for tilting the side door (24) outward.
A side-floor door support device for a dump vehicle, characterized in that the device is formed.