AU2023285846B2 - Dump truck - Google Patents
Dump truck Download PDFInfo
- Publication number
- AU2023285846B2 AU2023285846B2 AU2023285846A AU2023285846A AU2023285846B2 AU 2023285846 B2 AU2023285846 B2 AU 2023285846B2 AU 2023285846 A AU2023285846 A AU 2023285846A AU 2023285846 A AU2023285846 A AU 2023285846A AU 2023285846 B2 AU2023285846 B2 AU 2023285846B2
- Authority
- AU
- Australia
- Prior art keywords
- outer frame
- frame body
- loading
- loading bed
- bed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
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- Body Structure For Vehicles (AREA)
- Lock And Its Accessories (AREA)
Abstract
#$%^&*AU2023285846B220250626.pdf#####
28
ABSTRACT OF THE DISCLOSURE
There is provided a dump truck having a loading bed
tiltably mounted over a vehicle frame and a flap door of a
bottom edge opening type that configures a sidewall of the
loading bed. The flap door includes an outer frame body and
a gate body, the outer frame body being pivotally attached
to the loading bed in such a manner that the lower part side
pivots with the upper part side being a fulcrum, the gate
body being disposed to close an opening of the outer frame
body and pivotally attached to the outer frame body in such
a manner as to pivot in a horizontal direction when the
loading bed is laid. The dump truck includes an outer frame
body bracket disposed on the outer frame body, a loading bed
bracket disposed on the loading bed, a fixing pin that fixes
the outer frame body bracket and the loading bed bracket, a
first lock member that is a fixed structural object disposed
on the outer frame body, a second lock member that is a
fixed structural object disposed on the loading bed, and a
movable handle that is disposed on the gate body and is
capable of selectively engaging with and disengaging from
the first lock member and the second lock member.
ABSTRACT OF THE DISCLOSURE
There is provided a dump truck having a loading bed
tiltably mounted over a vehicle frame and a flap door of a
bottom edge opening type that configures a sidewall of the
loading bed. The flap door includes an outer frame body and
a gate body, the outer frame body being pivotally attached
to the loading bed in such a manner that the lower part side
pivots with the upper part side being a fulcrum, the gate
body being disposed to close an opening of the outer frame
body and pivotally attached to the outer frame body in such
a manner as to pivot in a horizontal direction when the
loading bed is laid. The dump truck includes an outer frame
body bracket disposed on the outer frame body, a loading bed
bracket disposed on the loading bed, a fixing pin that fixes
the outer frame body bracket and the loading bed bracket, a
first lock member that is a fixed structural object disposed
on the outer frame body, a second lock member that is a
fixed structural object disposed on the loading bed, and a
movable handle that is disposed on the gate body and is
capable of selectively engaging with and disengaging from
the first lock member and the second lock member.
28
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Description
1/5 1/5
FIG.1 FIG.1 2023285846
3 3 1 1
10 10 19 19 53 53
OB 12 12
A 5 5 2 2 4 4 11 11
FIG.2 FIG.2
10 10
17 17 19 19 53 53 12 12
e
2023285846 22 May 2025
1. Field of 1. Field of the theInvention Invention
[0001]
[0001] 2023285846
The presentinvention The present inventionrelates relates to to a dump a dump truck truck in in which aa loading which loadingbed bedisis tiltably tiltably mounted mounted overover a vehicle a vehicle frame. frame.
2. Descriptionofofthe 2. Description theRelated Related ArtArt
[0002]
[0002]
When aa loading When loadingbed bedhas has a flap a flap door door of aofbottom a bottom edge edge opening typeinina adump opening type dump truck truck in in which which the the loading loading bed is bed is tiltably mountedover tiltably mounted overa a vehicle vehicle frame, frame, a lower a lower part part of the of the flap door naturally flap door naturallyopens opens as as thethe loading loading bed bed tilts, tilts, and and therefore, conveniencefor therefore, convenience for dumping dumping work work of aofload a load is high. is high. However, However, aa fulcrum fulcrumisispresent present on on thethe upper upper partpart side side of the of the flap door of flap door of the thebottom bottom edge edge opening opening type, type, and and the flap the flap door door is left over is left overaafloor floorsurface surface of of thethe loading loading bed bed even even when when being opened. being opened. Therefore, Therefore, for for example, example, in in the the case case of of
loading or unloading loading or unloadingloads loads onto onto or or from from the the loading loading bed, bed, a a
load other than load other thanwhat whatcan can pass pass through through the the space space between between the the floor surfaceofofthe floor surface theloading loading bedbed andand the the flapflap doordoor needsneeds to to
be loaded be loaded or orunloaded unloaded through through being being lifted lifted upa to up to a higher higher position than position than the the flap flap door. door. Further, Further, there there are are also also loads loads
that are impossible that are impossibletoto dump, dump, such such asload as a a load thatthat has such has such a a
size as to size as to be beincapable incapableofof passing passing through through the the space space between between
1
2023285846 22 May 2025
the opened flap the opened flapdoor doorand and thethe floor floor surface surface of loading of the the loading
bed and bed and aa long longobject. object.
[0003]
[0003]
Thus, as described Thus, as describedininPatent Patent Document Document 1, there 1, there is a is a dump truck in dump truck inwhich, which,inin a loading a loading bedbed of aofbottom a bottom edge edge opening type,a aflap opening type, flapdoor door disposed disposed on the on the rearrear side side is is 2023285846
configured byananouter configured by outerframe frame body body with with a bottom a bottom edge edge opening opening structure anda agate structure and gatebody body that that closes closes an opening an opening of the of the outer outer frame frame body body and and has has a a side side opening opening structure. For the structure. For the
flap door of flap door of Patent PatentDocument Document 1, 1, a lever a lever handle handle that that can can selectively belocked selectively be lockedtoto the the gate gate body body and and the the loading loading bed bed is is disposed disposed on on the the outer outer frame frame body. When this body. When this lever lever handle handle
is locked to is locked to the thegate gatebody, body, thethe gate gate bodybody is fixed is fixed to the to the outer frame body, outer frame body,and andthe the flap flap door door is made is made intointo a bottom a bottom edge edge opening opening form. Conversely, when form. Conversely, when the the lever lever handle handle is is
locked to the locked to theloading loadingbed, bed, thethe outer outer frame frame bodybody is fixed is fixed to to
the loading bed the loading bedwhereas whereas constraint constraint of the of the gategate body body is is
released, andthe released, and theflap flapdoor door is is made made into into a side a side opening opening form. form.
Prior Art Document Prior Art Document
Patent Document Patent Document
[0004]
[0004]
Patent Document1:1:JP-5020959-B Patent Document JP-5020959-B
[0005]
[0005]
The flap door The flap doordisclosed disclosedin in Patent Patent Document Document 1 is1 is
2
2023285846 22 May 2025
equipped withthe equipped with thelever lever handle handle on on thethe outer outer frame frame body body of of
the the flap flap door. This lever door. This lever handle handle is is left left at at the the rear rear part part
outlet of the outlet of theloading loadingbed bed when when thethe flap flap doordoor is made is made into into the the side side opening opening form form and and the the gate gate body body is is opened. When aa opened. When load in the load in the loading loadingbed bed isis dumped dumped in in thisthis state, state, the load the load ejected fromthe ejected from theloading loadingbedbed interferes interferes withwith the lever the lever 2023285846
handle handle in in some some cases. At the cases. At the time time of of discharge discharge of of aa large- large-
size load such size load suchasasa arock, rock, thethe flap flap door door is used is used in side in the the side
opening opening form form in in many many cases. Thus, such cases. Thus, such interference interference of of the the
load possiblycauses load possibly causesdamage damage to to thethe lever lever handle. handle.
[0006]
[0006]
Further, thelever Further, the leverhandle handle is is used used forfor bothboth locking locking of of
the gate body the gate bodyatatthe thetime time of of thethe bottom bottom edgeedge opening opening form form and locking of and locking ofthe theouter outer frame frame body body at the at the timetime of side of the the side
opening opening form. Therefore, the form. Therefore, the positional positional relation relation between between aa
lock member for lock member forgate gatebody body locking locking andand a lock a lock member member for for outer frame body outer frame bodylocking lockingto to which which thethe lever lever handle handle is locked is locked is restricted. is restricted.
[0007]
[0007]
Accordingly,the Accordingly, thepresent present invention invention may may provide provide a dump a dump truck that can truck that canimprove improve convenience convenience for for loadload handling handling work work while keeping while keepinghigh highconvenience convenience forfor dumping dumping workwork owingowing to a to a bottom edge opening bottom edge openingstructure structure of of a flap a flap doordoor and and can enhance can enhance the protectivenessand the protectiveness andthe the flexibility flexibility in design in design regarding regarding a a
lock mechanismofofthe lock mechanism theflap flap door. door.
[0008]
[0008]
An aspect An aspect of ofthe thepresent present invention invention provides provides a dump a dump truck includinga acab, truck including cab, a vehicle a vehicle frame frame disposed disposed continuously continuously
3
2023285846 22 May 2025
with a with a rear rear part part of of the the cab, cab, a a loading loading bed bed tiltably tiltably mounted mounted
over the vehicle over the vehicleframe, frame, and and a flap a flap door door of aofbottom a bottom edge edge opening typethat opening type thatconfigures configures a sidewall a sidewall of the of the loading loading bed. bed. The flap door The flap doorincludes includesanan outer outer frame frame bodybody and and a gate a gate body,body, the outer frame the outer framebody bodybeing being pivotally pivotally attached attached to loading to the the loading
bed in bed in such such a a manner manner that that the the lower lower part part side side pivots pivots with with 2023285846
the upper part the upper partside sidebeing being a fulcrum, a fulcrum, the the gategate body body beingbeing disposed toclose disposed to closeananopening opening of of thethe outer outer frame frame body body and and pivotally attachedtotothe pivotally attached the outer outer frame frame bodybody in such in such a manner a manner as to pivot as to pivot in ina ahorizontal horizontal direction direction whenwhen the the loading loading bed bed is is laid. The dump laid. The dump truck truck includes includes also also an an outer outer frame frame body body
bracket disposed bracket disposed on on the the outer outer frame frame body, body, a a loading loading bed bed
bracket disposed bracket disposedononthe the loading loading bed, bed, a fixing a fixing pin that pin that fixesfixes the outer frame the outer framebody bodybracket bracket andand thethe loading loading bed bed bracket, bracket, a a
first lock member first lock memberthat thatisis a fixed a fixed structural structural object object disposed disposed on the outer on the outerframe framebody, body, a second a second lock lock member member that that is a is a fixed structuralobject fixed structural object disposed disposed on on the the loading loading bed, bed, and aand a movable handle movable handlethat thatisis disposed disposed on on the the gategate bodybody and is and is capable of selectively capable of selectivelyengaging engaging with with and and disengaging disengaging from from the first lock the first lockmember memberand and thethe second second locklock member. member.
[0009]
[0009]
According toaspects According to aspectsand and embodiments embodiments of the of the present present invention, itisispossible invention, it possibleto to improve improve convenience convenience for load for load handling workwhile handling work whilekeeping keeping high high convenience convenience for dumping for dumping work owing work owing to to the the bottom bottom edge edge opening opening structure structure of of the the flap flap
door and enhance door and enhancethe theprotectiveness protectiveness and and the the flexibility flexibility in in
design regardingthe design regarding thelock lock mechanism mechanism of the of the flapflap door.door.
4
2023285846 22 May 2025
[0010] Embodimentsofofthe
[0010] Embodiments thepresent present invention invention are are described described below by below by way wayofofnon-limiting non-limiting example example onlyonly and and with with reference reference to the accompanying to the accompanyingdrawings drawings briefly briefly described described as follows. as follows. FIG. FIG. 11 is is aa side sideview viewofof a dump a dump truck truck according according to to one embodimentofofthe one embodiment thepresent present invention; invention; 2023285846
FIG. FIG. 22 is is aa side sideview viewofof a loading a loading bed bed of the of the dump dump truck of FIG. truck of FIG.1;1;
FIG. FIG. 33 is is aa rear rearview viewofof a flap a flap door door included included in the in the dump truck according dump truck accordingtoto the the oneone embodiment embodiment of present of the the present
invention; invention; FIG. FIG. 44 is is aa sectional sectionalview view taken taken as as indicated indicated by the by the arrows IV-IVininFIG. arrows IV-IV FIG.3;3;
FIG. FIG. 55 is is aa right rightside side view view of of thethe flap flap doordoor in FIG. in FIG. 3; 3;
FIG. FIG. 66 is is aa left leftside sideview view of of thethe flap flap doordoor in FIG. in FIG. 3; 3;
FIG. FIG. 77 is is aa rear rearview viewofof an an outer outer frame frame bodybody locklock mechanism with mechanism withwhich whichthe the dump dump truck truck according according to one to the the one
embodiment ofthe embodiment of thepresent present invention invention is equipped; is equipped; FIG. FIG. 88 is is aa right rightside side view view of of thethe outer outer frame frame body body lock mechanismwith lock mechanism withwhich which thethe dump dump truck truck according according to the to the one embodimentofofthe one embodiment thepresent present invention invention is equipped; is equipped; and and FIG. FIG. 99 is is aa diagram diagramthat that represents represents the the state state in in which which aa gate gatebody bodyofofthe the flap flap door door included included in dump in the the dump
truck accordingtotothe truck according theone one embodiment embodiment of the of the present present invention is opened. invention is opened.
5
2023285846 22 May 2025
[0011]
[0011]
An embodiment An embodimentofofthe thepresent present invention invention willwill be be described belowwith described below withuse use of of thethe drawings. drawings.
[0012]
[0012]
FIG. FIG. 11 is is aa side sideview viewofof a dump a dump truck truck according according to to 2023285846
one one embodiment embodiment of of the the present present invention. FIG. 22 is invention. FIG. is aa side side
view view of of a a loading loading bed bed of of the the dump dump truck truck of of FIG. FIG. 1. In the 1. In the
following description,the following description, the left left andand the the right right in FIG. in FIG. 1 are1 are defined as the defined as thefront frontand and thethe rear, rear, respectively, respectively, of dump of the the dump
truck. truck.
[0013]
[0013]
-Dump Truck- -Dump Truck- The dump truck The dump truckillustrated illustratedin in FIG. FIG. 1 includes 1 includes a a
vehicle vehicle 33 having havinga acab cab 1 and 1 and a vehicle a vehicle frame frame (chassis) (chassis) 2 2
disposed continuouslywith disposed continuously with a rear a rear part part of the of the cab cab 1 and1 aand a loading loading bed bed 10 10 tiltably tiltably mounted mounted over over the the vehicle vehicle frame frame 2. 2. AA frame of the frame of the vehicle vehicleframe frame 2 is 2 is configured configured by coupling by coupling left left and right frames and right framesthat thatextend extend in in thethe front-rear front-rear direction direction by by
a a cross cross member. The loading member. The loading bed bed 10 10 is is mounted mounted over over the the
vehicle frame2 2with vehicle frame withthe the interposition interposition of aofsub-frame a sub-frame 4. 4.
The loadingbed The loading bed1010tilts tilts relative relative to the to the vehicle vehicle frameframe 2 2
around around aa hinge hinge5 5disposed disposedat at a rear a rear end end partpart of sub- of the the sub-
frame 4. frame 4.
[0014]
[0014]
Left and right Left and rightloading loading bed bed frames frames 11 that 11 that extend extend in in the front-reardirection the front-rear directionareare disposed disposed on aonlower a lower surface surface of of
the the loading loading bed bed 10. The loading 10. The loading bed bed frames frames 11 11 and and the the sub- sub-
2023285846 22 May 2025
frame frame 44 of of the thevehicle vehicleframe frame 2 are 2 are linked linked by aby a hydraulic hydraulic cylinder (notillustrated) cylinder (not illustrated) that that extends extends and and contracts contracts by a by a pressurized oilfrom pressurized oil froma a hydraulic hydraulic pump pump (not(not illustrated) illustrated) mounted on mounted on the the vehicle vehicle 3. 3. One One end end side side of of this this hydraulic hydraulic
cylinder is pivotally cylinder is pivotallysupported supported by by the the loading loading bed frames bed frames 11 11
with the interposition with the interpositionof of a hoist a hoist mechanism mechanism (not(not 2023285846
illustrated), andthe illustrated), and theother other endend side side thereof thereof is pivotally is pivotally supported supported by by the the sub-frame sub-frame 4 4 of of the the vehicle vehicle frame frame 2. When 2. When the hoist mechanism the hoist mechanismisisextended extended by by extending extending the the hydraulic hydraulic cylinder, theloading cylinder, the loadingbed bed 10 10 pivots pivots relative relative to vehicle to the the vehicle
frame 2, with frame 2, withthe thehinge hinge 5 being 5 being a fulcrum, a fulcrum, to rise to rise up into up into a a
standing standing posture posture (two-dot (two-dot dash dash line line in in FIG. FIG. 1). Thereafter, 1). Thereafter, when the when the hydraulic hydrauliccylinder cylinder is is contracted contracted to bend to bend the host the host mechanism, the mechanism, theloading loading bed bed 10 10 pivots pivots relative relative to vehicle to the the vehicle
frame 2, with frame 2, withthe thehinge hinge 5 being 5 being a fulcrum, a fulcrum, to return to return to a to a laid posture (solid laid posture (solidline line in in FIG. FIG. 1).1).
[0015]
[0015]
The loadingbed The loading bed1010isiscomposed composed of of a floor a floor surface surface and and sidewalls sidewalls on on the the front, front, rear, rear, left, left, and and right right sides. In the sides. In the
present embodiment, present embodiment,the the rear rear wall wall among among the the fourfour sidewalls sidewalls on the front, on the front,rear, rear,left, left, andand right right sides sides configures configures a flap a flap door (tailgate)12, door (tailgate) 12,and and the the other other three three sidewalls sidewalls configure configure fixed fixed walls. However, the walls. However, the left left and and right right sidewalls sidewalls
configure flapdoors configure flap doorsinstead instead of of thethe rearrear wallwall in some in some cases, cases, and the left and the leftand andright right sidewalls sidewalls andand the the rearrear wall wall configure configure flap doors as flap doors asinina athree-way three-way dump dump truck truck in other in other cases. cases. Although description Although descriptionwill will be be made made by taking by taking asexample as an an example a a
dump truck in dump truck inwhich whichthe the rear rear wall wall isflap is a a flap doordoor in the in the
7
2023285846 22 May 2025
present present embodiment, embodiment, the the present present invention invention can can be be applied applied also to aa dump also to dumptruck truckinin which which other other sidewalls sidewalls are flap are flap doorsdoors as above. as above.
[0016]
[0016]
-Flap Door- -Flap Door- FIG. FIG. 3 3 is is a a rear rear view view of of the the flap flap door door 12. FIG. 44 is 12. FIG. is 2023285846
a sectional view a sectional viewtaken takenasas indicated indicated by the by the arrows arrows IV-IVIV-IV in in
FIG. FIG. 3. FIG. 55 is 3. FIG. is aa right right side side view view of of the the flap flap door door 12, 12,
and and FIG. FIG. 6 6 is is a a left left side side view view thereof. FIG. 77 is thereof. FIG. is aa rear rear
view view of of an an outer outer frame frame body body lock lock mechanism mechanism (described (described later), and FIG. later), and FIG.8 8isisa a right right side side view view thereof. thereof.
[0017]
[0017]
As illustrated As illustratedininthese these diagrams, diagrams, the the flapflap doordoor 12 12 includes an outer includes an outerframe frame body body (outer (outer frame) frame) 15 a 15 and and a gate gate body 16. body 16. The The outer outer frame frame body body 15 15 is is configured configured into into aa
horizontally-long U-shape horizontally-long U-shape by by a horizontal a horizontal frame frame 15a that 15a that configures configures aalower lowerside side part part of of thethe outer outer frame frame body body 15 and 15 and vertical frames15b vertical frames 15band and 15c 15c that that configure configure leftleft and right and right lateral lateral side side parts. An element parts. An element that that configures configures an an upper upper
side side part part does does not not exist, exist, and and an an upper upper part part is is opened. The opened. The gate body 16 gate body 16isisdisposed disposedto to close close thethe opening opening of outer of the the outer
frame body 15 frame body 15(space (spacebetween between thethe vertical vertical frames frames 15b and 15b and 15c). 15c).
[0018]
[0018]
The outer frame The outer framebody body1515 is is pivotally pivotally attached attached to to other parts of other parts ofthe theloading loading bedbed 10 10 (in(in the the present present example, example, rear end parts rear end partsofofupper upper surfaces surfaces of of left left and and right right sidewalls sidewalls 19 and 20) 19 and 20) with withthe theinterposition interposition of of two two hinges hinges 17 18 17 and and 18
8
2023285846 22 May 2025
attached to upper attached to upperend endparts parts of of thethe left left and and right right vertical vertical frames frames 15b 15b and and 15c. The outer 15c. The outer frame frame body body 15 15 pivots pivots with with the the
upper part side upper part side(pins (pinsofof thethe hinges hinges 17 and 17 and 18) 18) beingbeing a a
fulcrum and opens fulcrum and opensthe thelower lower part part side side relative relative to the to the loading bed 10 loading bed 10asasthe theloading loading bedbed tilts tilts (FIG. (FIG. 1). 1).
[0019]
[0019] 2023285846
The gate body The gate body1616isispivotally pivotally attached attached to the to the left left vertical frame15b vertical frame 15b(the (the right right vertical vertical frame frame 15calso 15c is is also
available) ofthe available) of theouter outer frame frame body body 15 with 15 with the the interposition interposition of hinges 25 of hinges 25and and2626inin such such a manner a manner as pivot as to to pivot in the in the horizontal horizontal direction direction when when the the loading loading bed bed 10 10 is is laid. The laid. The respective hinges2525and respective hinges and 26 26 areare each each composed composed of upper of upper and and lower bosses27 lower bosses 27and andtwo two plates plates 28 28 in in which which eacheach one plate one plate 28 28
is coupled to is coupled toa arespective respectiveoneone of of thethe bosses bosses 27. 27.
[0020]
[0020]
One plate 28 One plate 28ofofeach eachofof the the hinges hinges 25 and 25 and 26made 26 is is made
to adhere to to adhere toa aleft leftside side surface surface of of the the outer outer frame frame body body 15 15
(a (a left side surface left side surfaceofofthe the vertical vertical frame frame 15b)15b) withwith a a
posture in which posture in whichthe theboss boss 27 27 is is protruded protruded rearward rearward from from a a
rear surfaceof rear surface ofthe theouter outer frame frame body body 15 viewed 15 as as viewed from from the the left side of left side of the theouter outerframe frame body body 15 15 (FIG. (FIG. 6), 6), for example. for example. The other plate The other plate2828ofofeach each of of thethe hinges hinges 25 and 25 and 26 is26made is made
to adhere to to adhere toa arear rearsurface surface of of thethe gate gate bodybody 16 with 16 with a a
posture in posture in which whichthe theboss boss 27 27 is is protruded protruded leftward leftward from from a a
left side end left side endsurface surfaceofof the the outer outer frame frame bodybody 15 (the 15 (the left left side surfaceof side surface ofthe thevertical vertical frame frame 15b) 15b) as viewed as viewed from from the the rear side of rear side ofthe theouter outerframe frame body body 15 15 (FIG. (FIG. 3), 3), for example. for example. In this manner, In this manner,two twoplates plates 28 28 that that each each configure configure a a
2023285846 22 May 2025
respective oneofofthe respective one thehinges hinges 25 25 andand 26 are 26 are disposed disposed at anat an equal intervalininthe equal interval theupward-downward upward-downward direction direction on each on each of of
the left side the left sidesurface surfaceofof thethe vertical vertical frame frame 15b 15b of outer of the the outer
frame body 15 frame body 15and anda aleft left end end part part of of the the rearrear surface surface of the of the gate gate body body 16. Further, in 16. Further, in the the state state in in which which the the bosses bosses 27 27
of the plates of the plates2828made madetoto adhere adhere to to the the gategate bodybody 16 put 16 are are put 2023285846
on the bosses on the bosses2727ofofthe the plates plates 28 28 made made to adhere to adhere to the to the outer frame body outer frame body15, 15,one one shaft shaft 29 29 is made is made to penetrate to penetrate thesethese four four bosses bosses 27. Owing to 27. Owing to this, this, the the four four plates plates 28 28 are are
joined throughthe joined through theshaft shaft 29. 29.
[0021]
[0021]
In FIG. 33 and In FIG. andFIG. FIG.6,6,a a gap gap is is present present between between the the upper and lower upper and lowerhinges hinges2525 andand 26,26, andand a central a central part part of the of the shaft shaft 29 29 is is exposed. However, aa configuration exposed. However, configuration in in which which the the
hinges 25 and hinges 25 and2626abut abutagainst against each each other other without without a gapa in gap in
the upward-downwarddirection the upward-downward direction andand thethe shaft shaft 29not 29 is is not
exposed exposed may may be be employed. Further, the employed. Further, the number number of of hinges hinges can can
be changed be changed although althoughdescription description hashas beenbeen mademade by taking by taking as as
an example the an example thecase caseinin which which thethe twotwo hinges hinges 25 26 25 and and(four 26 (four
plates 28 in plates 28 intotal) total)are are disposed disposed in in the the present present embodiment. embodiment.
[0022]
[0022]
-Automatic Release-type -Automatic Release-type Lock Lock Mechanism- Mechanism- Moreover, the Moreover, theloading loading bed bed 10 10 hashas an automatic an automatic release-type lockmechanism release-type lock mechanism 30 30 that that locks locks bottom bottom edge edge opening operationofofthe opening operation the flap flap door door 12 when 12 when the the loading loading bed bed 10 is laid 10 is laid and andthat thatautomatically automatically releases releases locking locking of the of the flap door 12 flap door 12 to topermit permitthe the bottom bottom edge edge opening opening operation operation of of
the the flap flap door door 12 12 when when the the loading loading bed bed 10 10 is is tilted. The tilted. The
10
2023285846 22 May 2025
automatic release-type automatic release-type lock lock mechanism mechanism 30 has 30 has the following the following configuration. When the configuration. When the loading loading bed bed 10 10 is is laid, laid, the the outer outer
frame body 15 frame body 15isisconstrained constrainedin in thethe state state in which in which a hook a hook 32 32
is hooked on is hooked on aabracket bracket3131 disposed disposed atlower at a a lower partpart of the of the horizontal horizontal frame frame 15a 15a of of the the outer outer frame frame body body 15. When the 15. When the
loading bed 10 loading bed 10isistilted, tilted,thethe hook hook 32 detached 32 is is detached from from the the 2023285846
bracket 31 bracket 31 by bya amechanism mechanism that that operates operates in linkage in linkage with with the the tilt of the tilt of the loading loadingbed bed 10, 10, andand bottom bottom edgeedge opening opening of the of the outer outer frame frame body body 15 15 is is permitted. When the permitted. When the loading loading bed bed 10 10
returns fromthe returns from thetilted tilted state state to to thethe laidlaid state, state, the hook the hook 32 32
is automaticallyhooked is automatically hookedonon thethe bracket bracket 31, 31, and and a return a return to to
the state in the state inwhich whichthe the outer outer frame frame body body 15 constrained 15 is is constrained to to
the the loading loading bed bed 10 10 is is made. More specific made. More specific configurations configurations of of
the automaticrelease-type the automatic release-type lock lock mechanism mechanism 30 described 30 are are described
in JP-S58-49410-A,JP-S59-25694-A, in JP-S58-49410-A, JP-S59-25694-A, JP-S60-21095-A, JP-S60-21095-A, and so and so forth, for example. forth, for example.
[0023]
[0023]
-Outer FrameBody -Outer Frame BodyLock LockMechanism- Mechanism-
Further, in addition Further, in additiontoto the the automatic automatic release-type release-type lock mechanism30, lock mechanism 30,the thedump dump truck truck is is equipped equipped withwith an outer an outer frame body lock frame body lockmechanism mechanism40 40 of of a manual a manual operation operation system system that preventsbottom that prevents bottomedge edge opening opening of the of the outer outer frameframe body body 15 15
when the when the loading loadingbed bed1010 is is made made to to stand stand in state in the the state in in
which the which the gate gatebody body1616 is is opened opened (the (the state state in which in which the the flap flap door door 12 12 is is opened opened from from a a lateral lateral side). The outer side). The outer
frame body lock frame body lockmechanism mechanism40 40 includes includes outer outer frame frame body body brackets 41 brackets 41 disposed disposed on on the the outer outer frame frame body body 15, 15, loading loading bed bed
brackets 42 brackets 42disposed disposedonon thethe loading loading bed bed 10, 10, and and a a fixing fixing pin pin
11
2023285846 22 May 2025
43 that fixes 43 that fixesthe theouter outer frame frame body body brackets brackets 41 the 41 and and the
loading bed brackets loading bed brackets42. 42.
[0024]
[0024]
In the present In the presentembodiment, embodiment, a configuration a configuration in which in which the outer frame the outer framebody bodybrackets brackets 41 41 protrude protrude downward downward from from a a
lower lower surface surface of of the the horizontal horizontal frame frame 15a 15a is is exemplified. exemplified. AA 2023285846
pair of pair of loading loading bed bed brackets brackets 42 42 are are disposed disposed on on the the loading loading
bed 10 bed 10 in in such sucha amanner manner that that thethe position position thereof thereof corresponds corresponds to to the the outer outer frame frame body body brackets brackets 41. One fixing 41. One fixing
pin 43 is pin 43 is inserted, inserted,inin the the left-right left-right direction, direction, into into a pina pin hole hole made made in in each each of of the the outer outer frame frame body body brackets brackets 41 41 and and the the loading loading bed bed brackets brackets 42. This causes 42. This causes the the outer outer frame frame
body brackets body brackets4141and andthe the loading loading bedbed brackets brackets 42 to42beto be locked to each locked to eachother otherthrough through thethe fixing fixing pin pin 43, 43, making making the the state in which state in whichthe theouter outer frame frame body body 15 constrained 15 is is constrained to the to the loading bed 10. loading bed 10.
[0025]
[0025]
Moreover, in Moreover, inthe thepresent present embodiment, embodiment, a configuration a configuration in which aa pair in which pairofofouter outer frame frame body body brackets brackets 41 disposed 41 are are disposed
on the side on the side remoter remoterfrom from thethe hinges hinges 25 and 25 and 26 (the 26 (the position position closer to the closer to theright) right)than than thethe center center of the of the outer outer frameframe body body 15 in the 15 in the left-right left-rightdirection direction of of thethe outer outer frame frame body body 15 is15 is exemplified. The positions exemplified. The positions (the (the positions positions in in the the left-right left-right
direction) ofthe direction) of theouter outer frame frame body body brackets brackets 41, 41, the loading the loading bed bed brackets brackets 42, 42, and and a a first first lock member 52 lock member 52 to to be be described described
later later correspond correspond to to each each other. However, the other. However, the outer outer frame frame
body brackets body brackets4141can canbebe installed installed at any at any position position on the on the outer frame body outer frame body15, 15,and and it it is is also also possible possible to dispose to dispose a a
12
2023285846 22 May 2025
plurality plurality of of pairs pairs of of the the outer outer frame frame body body brackets brackets 41. In 41. In the case of the case of disposing disposinga a plurality plurality of pairs of pairs of outer of the the outer
frame body brackets frame body brackets41, 41, a plurality a plurality of sets of sets of loading of the the loading
bed brackets bed brackets4242and andthe the fixing fixing pinpin 43 corresponding 43 corresponding to the to the plurality ofpairs plurality of pairsofofthe the outer outer frame frame bodybody brackets brackets 41 are 41 are prepared accordingtotoneed. prepared according need. 2023285846
[0026]
[0026]
Further, thefixing Further, the fixingpin pin 43 43 is is coupled coupled to the to the outer outer frame body 15 frame body 15through througha a chain chain 44 44 to to make make a countermeasure a countermeasure against lossofofthe against loss thefixing fixing pinpin 43 43 drawn drawn out out of outer of the the outer
frame frame body body brackets brackets 41 41 and and the the loading loading bed bed brackets brackets 42. In 42. In addition, thefixing addition, the fixingpin pin 43 43 drawn drawn outout of the of the outer outer frameframe body brackets body brackets4141and andthe the loading loading bedbed brackets brackets 42 be 42 can can be
mounted on mounted on a a holding holding member member with with which which the the outer outer frame frame body body
15 15 is is equipped. In the equipped. In the present present embodiment, embodiment, pin pin holding holding
holes 45 (FIG. holes 45 (FIG.5)5)are aremade made at at positions positions thatthat do overlap do not not overlap
with the with the loading loadingbed bedbrackets brackets 42 42 as viewed as viewed fromfrom the left the left and and the right in the right inthe theouter outerframe frame body body brackets brackets 41, 41, and the and the configuration configuration isismade madetoto allow allow thethe fixing fixing pin pin 43betoheld 43 to be held
by being by being inserted inserted into into the the pin pin holding holding holes holes 45. 45. That That is, is,
in the present in the presentembodiment, embodiment,thethe outer outer frame frame bodybody brackets brackets 41 41
double as the double as theholding holdingmember member forfor thethe fixing fixing pin pin 43. 43.
[0027]
[0027]
As above, As above, the thefixing fixingpin pin 43 43 is is coupled coupled to the to the outerouter frame body 15 frame body 15through throughthe the chain chain 44 44 andand can can be mounted be mounted on the on the outer frame body outer frame body1515through through being being drawn drawn out out of loading of the the loading
bed brackets bed brackets4242and andbeing being inserted inserted intointo the the pin holding pin holding holes holes 45. When the 45. When the flap flap door door 12 12 is is opened opened from from the the bottom, bottom,
13
2023285846 22 May 2025
the fixing pin the fixing pin4343moves moves in in association association withwith the the flap flap door door 12 12
and is evacuated and is evacuatedfrom fromthe the discharge discharge route route of aof a load. load.
[0028]
[0028]
Moreover, the Moreover, thefixing fixingpin pin 43 43 is is configured configured in such in such a a
manner that manner that a a tip tip part part 43a 43a thereof thereof can can bend bend relative relative to to a a
main body main body part partofofthe the fixing fixing pinpin 43 through 43 through a (not a pin pin (not 2023285846
illustrated). This configures illustrated). This configures aa removal removal prevention prevention
mechanism. As mechanism. As illustrated illustrated in in FIG. FIG. 7, 7, by by inserting inserting the the
fixing pin 43 fixing pin 43into intothe theouter outer frame frame body body brackets brackets 41 the 41 and and the
loading bed brackets loading bed brackets4242 and and bending bending the the tip tip partpart 43a, 43a, dropping-off ofthe dropping-off of thefixing fixing pinpin 43 43 from from the the outer outer frameframe body body brackets 41and brackets 41 andthe theloading loading bedbed brackets brackets 42 suppressed. 42 is is suppressed.
It is obvious It is obviousthat thatthis this removal removal prevention prevention mechanism mechanism similarly functionsalso similarly functions also when when thethe fixing fixing pin pin 43inserted 43 is is inserted
into the pin into the pinholding holdingholes holes 45.45.
[0029]
[0029]
-Gate Body Lock -Gate Body LockMechanism- Mechanism-
The gate body The gate body1616isisfixed fixed to to thethe outer outer frame frame bodybody 15 15 by a by a gate gate body body lock lock mechanism mechanism 50. 50. The The gate gate body body lock lock
mechanism 50 mechanism 50includes includes first first lock lock members members 51 52 51 and andthat 52 that are are fixed structuralobjects fixed structural objects disposed disposed on on the the outer outer frame frame body body 15, 15, aa second second lock lockmember member53 53 (FIG. (FIG. 1 and 1 and FIG.FIG. 2) that 2) that is a is a fixed structuralobject fixed structural object disposed disposed on on the the loading loading bed and bed 10, 10, and
a movable handle a movable handle5555that that cancan selectively selectively engage engage with with and and disengage fromthe disengage from thefirst first lock lock members members 51 and 51 and 52 the 52 and and the
second lock member second lock member53. 53.
[0030]
[0030]
In the present In the presentembodiment, embodiment,thethe first first locklock member member 51 51
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2023285846 22 May 2025
is disposed on is disposed ona arear rearsurface surface (a (a surface surface oriented oriented rearward) rearward) of the right of the rightvertical verticalframe frame 15c15c of of the the outer outer frame frame body body 15. 15. The first lock The first lockmember member5252 is is disposed disposed on aonrear a rear surface surface (a (a
surface orientedrearward) surface oriented rearward)of of thethe horizontal horizontal frame frame 15a of 15a of the the outer outer frame frame body body 15. The second 15. The second lock lock member member 53 53 is is
disposed onan disposed on anouter outerwall wall surface surface of the of the sidewall sidewall 19 on19the on the 2023285846
left side (the left side (theside sideononwhich which thethe hinges hinges 25 and 25 and 26the 26 of of the
loading loading bed bed 10 10 are are disposed) disposed) of of the the loading loading bed bed 10. The 10. The distance fromthe distance from theshaft shaft 29 29 of of thethe above-described above-described hinges hinges 25 25
and 26 to and 26 to the thesecond secondlock lock member member 53 53 corresponds corresponds to the to the distance fromthe distance from theshaft shaft 29 29 to to thethe first first locklock member member 51. 51. Further, thepositions Further, the positionsinin thethe height height direction direction also also correspond toeach correspond to eachother other between between thethe first first locklock member member 51 51
and and the the second second lock lock member member 53. The first 53. The first lock lock members members 51 51
and 52 and and 52 and the thesecond secondlock lock member member 53 are 53 are block-shaped block-shaped or or
bracket-shaped members bracket-shaped members and and each each have have a pin a pin holehole (not (not illustrated) illustrated) opened opened upward. These pin upward. These pin holes holes may may penetrate penetrate
the first lock the first lockmembers members5151 andand 52 52 andand the the second second lock lock member member 53 but do 53 but do not nothave havetotopenetrate penetrate them. them.
[0031]
[0031]
The movable handle The movable handle5555isis held held by by support support members members 54 54 juxtaposed onthe juxtaposed on therear rearsurface surface of of thethe gategate bodybody 16 at16a at a predetermined interval predetermined interval in in thethe upward-downward upward-downward direction direction and and is configuredtotobebecapable is configured capable of of vertically vertically sliding sliding and and pivoting inthe pivoting in thehorizontal horizontal direction direction relative relative to gate to the the gate
body 16. body 16. In In the the present present embodiment, embodiment, the the support support members members 54 54
are disposedononthe are disposed theside side remoter remoter from from the the hinges hinges 25 26 25 and and 26
than the center than the centerofofthe the outer outer frame frame body body 15 the 15 in in left-right the left-right
15
2023285846 22 May 2025
direction direction of of the the outer outer frame frame body body 15. The outer 15. The outer frame frame body body
brackets 41,the brackets 41, theloading loading bedbed brackets brackets 42, 42, the the firstfirst lock lock member 52, member 52, and andthe thesupport support members members 54 line 54 line upthe up in in upward- the upward-
downward direction,and downward direction, and the the positions positions of the of the outer outer frameframe body brackets body brackets41, 41,the the loading loading bedbed brackets brackets 42, 42, the first the first lock member 52, lock member 52,and andthe the support support members members 54 the 54 in in left-right the left-right 2023285846
direction correspondtoto direction correspond each each other. other.
[0032]
[0032]
The movable handle The movable handle5555isis formed formed into into a J-shape a J-shape with with a a
first locked part first locked part55a, 55a,a a second second locked locked partpart 55b,55b, and aand a handle handle part part 55c. The first 55c. The first locked locked part part 55a 55a can can be be locked locked to to
either of the either of thefirst firstlock lock member member 51 51 and and the the second second lock lock member 53 by member 53 bybeing beingselectively selectively inserted inserted intointo the hole the pin pin hole of of
the the first first lock lock member member 51 51 or or the the second second lock lock member member 53. The 53. The second lockedpart second locked part55b 55bcan can be be locked locked to the to the first first lock lock member 52 member 52 by bybeing beinginserted inserted into into thethe pin pin holehole of first of the the first
lock lock member member 52. The handle 52. The handle part part 55c 55c couples couples the the first first
locked part 55a locked part 55aand andthe the second second locked locked partpart 55b 55b to each to each other. The handle other. The handle part part 55c 55c horizontally horizontally extends, extends, and and the the
first locked part first locked part55a 55aand and thethe second second locked locked partpart 55b extend 55b extend downward downward from from the the handle handle part part 55c. The second 55c. The second locked locked part part
55b is vertically 55b is verticallylong longrelative relative to to thethe first first locked locked part part 55a. Thesecond 55a. The second locked locked part part 55b 55.b is is supported supported by the by the above- above- described supportmembers described support members 54,54, andand thethe movable movable handle handle 55 can 55 can slide in the slide in the axial axialdirection direction (the (the upward-downward upward-downward direction) direction) and pivot in and pivot inthe thehorizontal horizontal direction, direction, withwith the the second second locked part 55b locked part 55bbeing beingthe the axis. axis.
[0033]
[0033]
16
2023285846 22 May 2025
On the second On the secondlocked lockedpart part 55b55b of of thethe movable movable handle handle 55 inserted into 55 inserted intothe thesupport support members members 54, 54, a stopper a stopper part part 55d 55d is disposed to is disposed tobebelocated located between between thethe upper upper and and lowerlower support support members members 54. Moreover, for 54. Moreover, for the the second second locked locked part part
55b, 55b, aa spring spring5757isisdisposed disposed to to interpose interpose between between the the stopper stopper part part 55d 55d and and the the upper upper support support member member 54. The 54. The 2023285846
movable handle movable handle5555isisbiased biased by by thethe spring spring 57 toward 57 toward the the first lock members first lock members5151and and 52 52 andand thethe second second locklock member member 53, 53, that is, downward. that is, downward.
[0034]
[0034]
When the When the movable movablehandle handle 55 55 is is lifted lifted up against up against the the spring 57, the spring 57, thefirst firstlocked locked part part 55a55a and and the the second second locked locked part 55b are part 55b aredrawn drawnout out of of thethe first first locklock members members 51 52, 51 and and 52,
and the constraint and the constraintofofthe the gate gate body body 16 the 16 to to the outer outer frameframe body 15 body 15 is is released. released. The The movable movable handle handle 55 55 doubles doubles as as aa
grip of the grip of the gate gatebody body1616 andand cancan be be usedused as the as the grip grip directly whenbeing directly when beingdrawn drawn outout of of thethe first first locklock members members 51 51
and and 52. By directly 52. By directly pulling pulling rearward, rearward, in in the the state state in in which which
the constraintofofthe the constraint thegate gate body body 16 16 is released, is released, the movable the movable handle 55 drawn handle 55 drawnout outofof the the first first lock lock members members 51 52, 51 and and the 52, the
gate body 16 gate body 16can canbebeopened opened around around thethe shaft shaft 29, 29, and flap and the the flap
door 12 can door 12 canbe beopened openedfrom from a lateral a lateral sideside around around the shaft the shaft 29. Further, the 29. Further, the gate gate body body 16 16 can can be be fixed fixed in in the the opened opened
state by making state by makingthe theopened opened gate gate body body 16 pivot 16 pivot forward forward by 270 by 270 degrees andinserting degrees and insertingthe the first first locked locked partpart 55a 55a of the of the movable handle movable handle5555into into the the second second lock lock member member 53. 53.
[0035]
[0035]
The amount of The amount ofdownward downward protrusion protrusion of the of the movable movable
17
2023285846 22 May 2025
handle 55 (the handle 55 (thesecond secondlocked locked part part 55b) 55b) fromfrom the the lowerlower support member5454isisensured support member ensured to to be be greater greater thanthan the maximum the maximum stroke of the stroke of themovable movablehandle handle 55 55 defined defined based based on the on the vertical intervalbetween vertical interval between thethe support support members members 54, the 54, the thickness ofthe thickness of thestopper stopper part part 55d, 55d, and and the the thickness thickness of the of the spring spring 57 57 at at the the time time of of shrinkage shrinkage thereof. This provides thereof. This provides aa 2023285846
structure thatkeeps structure that keepsthe the second second locked locked partpart 55b 55b from from beingbeing drawn out of drawn out ofthe thesupport support members members 54 54 eveneven whenwhen the movable the movable handle 55 is handle 55 islifted liftedup. up.
[0036]
[0036]
-Operation ofFlap -Operation of FlapDoor- Door-
For example,when For example, whenthe themovable movable handle handle 55 in 55 is is the in the
state illustratedininFIG. state illustrated FIG. 3 (defined 3 (defined as aaslock a lock position), position), if if
the movable handle the movable handle5555isis lifted lifted up up against against the the biasing biasing forceforce of the spring of the spring57, 57,first, first, thethe first first locked locked partpart 55a the 55a and and the
second lockedpart second locked part55b 55bofof thethe movable movable handle handle 55 drawn 55 are are drawn
out of the out of the first firstlock lockmembers members 51 51 andand 52, 52, and and locking locking of the of the gate gate body body 16 16 is is released. When the released. When the movable movable handle handle 55 55 is is
directly pulledrearward directly pulled rearwardto to open open thethe gategate bodybody 16, rear 16, the the rear
part of the part of theloading loadingbed bed 10 10 enters enters the the state state in which in which it isit is widely widely opened opened without without an an obstacle. Therefore, work obstacle. Therefore, work of of
loading or unloading loading or unloadingofof loads loads onto onto or from or from the the loading loading bed bed 10 is also 10 is also efficient. efficient.
[0037]
[0037]
Moreover, the Moreover, theopened openedgate gate body body 16 16 can can be fixed be fixed by by making the making the gate gate body body 16 16 pivot pivot to to the the front front side side and and locking locking
the the movable movable handle handle 55 55 to to the the second second lock lock member member 53. At this 53. At this
time, as illustrated time, as illustratedinin FIG. FIG. 9, 9, thethe movable movable handle handle 55 55
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2023285846 22 May 2025
accompanies thegate accompanies the gatebody body 16 16 to to move move to atoleft a left side side surface surface of the loading of the loadingbed bed10, 10,which which provides provides the the state state in which in which a a
movable component movable component of of the the lock lock mechanism mechanism has has been been evacuated evacuated
from the rear from the rearpart partopening opening of of thethe opened opened loading loading bed 10. bed 10. When the When the loading loading bed bed 10 10 is is tilted tilted in in this this state, state, locking locking by by
the automaticrelease-type the automatic release-type lock lock mechanism mechanism 30 released 30 is is released in in 2023285846
association association with with the the tilt tilt of of the the loading loading bed bed 10. However, 10. However, because the because the outer outer frame frame body body 15 15 is is fixed fixed to to the the loading loading bed bed
10 by the 10 by the outer outerframe framebody body lock lock mechanism mechanism 40, 40, a load a load on the on the loading bed 10 loading bed 10can canbebedumped dumped from from thethe space space of opened of the the opened
gate body 16 gate body 16(the (thespace space between between thethe vertical vertical frames frames 15b and 15b and 15c 15c of of the the outer outer frame frame body body 15). In this 15). In this case, case, because because the the
gate body 16 gate body 16has hasbeen beenevacuated evacuated from from the the rearrear side side of the of the loading bed 10, loading bed 10,there thereisis no no obstacle, obstacle, and and eveneven a load a load larger larger than the height than the heightofofthe the gate gate body body 16 16 and and a long a long object object can can easily easily be be dumped. Further, because dumped. Further, because the the movable movable handle handle 55, 55,
which is which is aa movable movablecomponent, component, hashas been been evacuated evacuated from from the the discharge routeofofthe discharge route the loading loading bedbed 10, 10, interference interference between between the dumped load the dumped loadand andthe the movable movable handle handle 55 also 55 is is also
suppressed. suppressed.
[0038]
[0038]
On the other On the otherhand, hand,when when thethe loading loading bed bed 10 is 10 is returned to the returned to thelaid laidstate state andand thethe movable movable handle handle 55 is55 is returned to the returned to thelock lockposition position in in thethe opposite opposite procedure procedure to to
the above, the the above, thestate stateinin which which thethe gate gate bodybody 16firmly 16 is is firmly
fixed to the fixed to the outer outerframe frame body body 15 15 at at two two places places by the by the movable handle movable handle 55 55 is is made. made. This This state state is is kept kept in in normal normal
states. When bottom states. When bottom edge edge opening opening operation operation of of the the flap flap door door
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2023285846 22 May 2025
12 is executed, 12 is executed,the thefixing fixing pinpin 43 43 is is drawn drawn out out of the of the loading bed brackets loading bed brackets4242 toto release release thethe constraint constraint of the of the outer frame body outer frame body1515byby the the outer outer frame frame bodybody locklock mechanism mechanism 40, 40, and and is is inserted inserted into into the the pin pin holding holding holes holes 45. This 45. This causes the outer causes the outerframe framebody body 15 15 to to enters enters the the state state in which in which it is locked it is locked only onlybybythe the automatic automatic release-type release-type lock lock 2023285846
mechanism 30. mechanism 30.
[0039]
[0039]
When the When the loading loadingbed bed1010 is is tilted tilted in the in the state state in in which the which the constraint constraintofof thethe outer outer frame frame bodybody 15the 15 by by outer the outer
frame body lock frame body lockmechanism mechanism40 40 is is released, released, a load a load on the on the loading bed 10 loading bed 10can canbebedumped dumped similarly similarly to atoloading a loading bed bed having an existing having an existingflap flap door door of of a bottom a bottom edgeedge opening opening type.type. When this When this dumping dumpingwork work has has ended, ended, the the loading loading bedis10 is bed 10 laid, and the laid, and thefixing fixingpin pin 43 43 is is inserted inserted intointo the the outerouter frameframe body brackets body brackets4141and andthe the loading loading bedbed brackets brackets 42 again. 42 again.
[0040]
[0040]
-Effects- -Effects- (1) (1) According tothe According to thepresent present embodiment, embodiment, the the dumpdump truck has the truck has theouter outerframe frame body body lock lock mechanism mechanism 40 the 40 and and the
gate gate body body lock lock mechanism mechanism 50. Therefore, dumping 50. Therefore, dumping can can be be
executed withuse executed with useofofthe the flap flap door door 12 the 12 in in the bottom bottom edge edge opening formbybyreleasing opening form releasing locking locking by the by the outer outer frameframe body body lock mechanism40, lock mechanism 40,and anddumping dumping cancan be executed be executed with with use of use of the flap door the flap door1212ininthe the side side opening opening formform by releasing by releasing locking locking by by the the gate gate body body lock lock mechanism mechanism 50. Moreover, by 50. Moreover, by
releasing thelocking releasing the lockingbyby the the gate gate body body locklock mechanism mechanism 50 and 50 and opening the gate opening the gatebody body16, 16, thethe state state in which in which the rear the rear side side
20
2023285846 22 May 2025
of the loading of the loadingbed bed1010isis widely widely opened opened and and there there is nois no obstacle obstacle can can be be made. Owing to made. Owing to this, this, loading loading and and unloading unloading
of loads onto of loads ontoand andfrom from the the loading loading bed bed 10 can 10 can also also be be
executed efficiently. executed efficiently.
[0041]
[0041]
At this At this time, time,according accordingto to thethe present present embodiment, embodiment, 2023285846
when the when the flap flapdoor door1212 isis used used in in thethe sideside opening opening form,form, the the movable handle movable handle5555accompanies accompanies thethe gate gate bodybody 16move 16 to to move to a to a lateral sideof lateral side ofthe theloading loading bedbed 10,10, which which provides provides the state the state in which the in which the movable movablehandle handle 55,55, which which is the is the movable movable component ofthe component of thegate gatebody body lock lock mechanism mechanism 50, 50, has been has been evacuated fromthe evacuated from thedischarge discharge route route of the of the loading loading bed 10. bed 10. Therefore, interference Therefore, interference of of a load a load discharged discharged fromfrom the the loading bed 10 loading bed 10with withthe the movable movable handle handle 55 can 55 can be suppressed. be suppressed. Further, theouter Further, the outerframe frame body body lock lock mechanism mechanism 40 the 40 and and gate the gate
body lock body lock mechanism mechanism 50 50 are are independent independent of of each each other. other. Thus, Thus,
restrictions onthe restrictions on thelayout layout of of thethe outer outer frame frame body body lock lock mechanism 40 mechanism 40due duetotothe the gate gate body body lock lock mechanism mechanism 50 also 50 can can also
be alleviated. be alleviated.
[0042]
[0042]
As above, As above, according accordingtoto the the present present embodiment, embodiment, it isit is possible toimprove possible to improveconvenience convenience forfor loadload handling handling work work whilewhile keeping highconvenience keeping high convenienceforfor dumping dumping workwork owing owing to the to the bottom edgeopening bottom edge openingstructure structure of of thethe flapflap doordoor 12 and 12 and enhance theprotectiveness enhance the protectivenessandand thethe flexibility flexibility in design in design regarding thelock regarding the lockmechanism mechanism of of thethe flap flap doordoor 12. 12.
[0043]
[0043]
(2) (2) The movable handle The movable handle5555involves involves notnot only only the the
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2023285846 22 May 2025
fixing of the fixing of thefirst firstlocked locked part part 55a55a to the to the first first lock lock member member 51 but also 51 but also the thefixing fixingofof thethe second second locked locked partpart 55b, 55b, whichwhich plays plays aa role roleasasthe therotation rotation axis axis of the of the movable movable handle handle 55, 55, to to the the first first lock lock member member 52. The gate 52. The gate body body 16 16 can can firmly firmly be be
fixed by locking fixed by lockingatattwo two places places in in spite spite of the of the simple simple configuration, andthere configuration, and there is is also also an an advantage advantage that that the the 2023285846
locking at two locking at twoplaces placescan can simultaneously simultaneously be operated. be operated.
[0044]
[0044]
In the present In the presentembodiment, embodiment,thethe movable movable handle handle 55 is 55 is configured touse configured to usenot notonly only thethe first first locked locked partpart 55a but 55a but also the second also the secondlocked lockedpart part 55b55b forfor the the constraint constraint of the of the gate gate body body 16. However, the 16. However, the movable movable handle handle 55 55 does does not not
necessarily needtotobebe necessarily need limited limited to to this this configuration configuration in in
terms terms of of ensuring ensuring of of operability. If the operability. If the strength strength of, of, for for
example, thefirst example, the firstlocked locked part part 55a55a is sufficient is sufficient without without employing sucha adouble employing such double lock lock structure, structure, it also it is is also
conceivable thatthe conceivable that thelocking locking mechanism mechanism between between the second the second locked part 55b locked part 55band andthe the first first lock lock member member 52 omitted 52 is is omitted and and a configurationininwhich a configuration which merely merely thethe first first locked locked part part 55a is 55a is locked to the locked to thefirst firstlock lock member member 51 51 to fix to fix the the gate gate body body 16 16
is employed. is employed.
[0045]
[0045]
(3) (3) The flexibilityofofthe The flexibility the layout layout of of thethe outer outer frame frame body lock body lock mechanism mechanism 40 40 is is high. high. Thus, Thus, it it is is also also possible possible
to dispose the to dispose theouter outerframe frame body body lock lock mechanism mechanism 40 at40a at a position separatefrom position separate from the the gate gate body body locklock mechanism mechanism 50, 50, depending on,for depending on, forexample, example, thethe specification specification of loading of the the loading
bed 10. bed 10. Meanwhile, Meanwhile, needless needless to to say, say, it it is is also also possible possible to to
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2023285846 22 May 2025
dispose theouter dispose the outerframe frame body body lock lock mechanism mechanism 40 according 40 according to to
the the position position of of the the gate gate body body lock lock mechanism mechanism 50. By making 50. By making
the positionsofofthe the positions theouter outer frame frame body body brackets brackets 41, the 41, the loading bed brackets loading bed brackets42, 42, and and thethe first first locklock member member 52 in52the in the
left-right directioncorrespond left-right direction correspond to to each each other other as illustrated as illustrated in FIG. 3, in FIG. 3, aa worker workercan can execute execute operation operation of the of the movable movable 2023285846
handle 55 and handle 55 andoperation operationof of thethe fixing fixing pin pin 43the 43 at at same the same
standing position,and standing position, andhigh high operability operability can can be ensured. be ensured.
[0046]
[0046]
(4) (4) In the fixing In the fixingpin pin43, 43,the the tiptip part part 43a 43a includes includes the the removal removal prevention prevention mechanism mechanism that that can can bend. Thus, bend. Thus, needless tosay, needless to say,removal removal of of thethe fixing fixing pin pin 43 be 43 can can be
prevented. In addition, prevented. In addition, aa further further component component is is not not required required
for for the the removal removal prevention prevention of of the the fixing fixing pin pin 43. Therefore, 43. Therefore, increase in the increase in thenumber numberofof components components for for the the inclusion inclusion of of
the removal prevention the removal preventionmechanism mechanism of of the the fixing fixing pincan pin 43 43 be can be
suppressed. suppressed.
[0047]
[0047]
Moreover, theremoval Moreover, the removalprevention prevention mechanism mechanism of the of the fixing pin 43 fixing pin 43can canbebeapplied applied to to notnot only only prevention prevention of of
removal of the removal of thefixing fixingpin pin 43 43 from from thethe outer outer frame frame body body brackets 41and brackets 41 andthe theloading loading bedbed brackets brackets 42 but 42 but also also prevention ofremoval prevention of removalofof thethe fixing fixing pin pin 43 from 43 from the pin the pin holding holding holes holes 45. Therefore, it 45. Therefore, it is is also also possible possible to to
suppress dropping-offofof suppress dropping-off the the fixing fixing pin pin 43 from 43 from the pin the pin holding holes4545and holding holes andsuppress suppress interference interference of fixing of the the fixing pin pin 43 with aa load 43 with loaddischarged discharged from from thethe loading loading bed bed 10 when 10 when dumping is executed dumping is executedbyby using using thethe bottom bottom edgeedge opening opening
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2023285846 22 May 2025
structure ofthe structure of theflap flapdoor door 12.12.
[0048]
[0048]
(5) (5) The fixing pin The fixing pin4343isiscoupled coupled to to thethe outer outer frame frame body 15 body 15 through throughthe thechain chain 44 44 andand cancan be held be held by pin by the the pin
holding holding holes holes 45. Therefore, loss 45. Therefore, loss of of the the fixing fixing pin pin 43 43
drawn out of drawn out ofthe theouter outer frame frame body body brackets brackets 41 the 41 and and the 2023285846
loading loading bed bed brackets brackets 42 42 can can be be suppressed. Further, owing suppressed. Further, owing
to holding, by to holding, bythe thepin pinholding holding holes holes 45, 45, of the of the fixing fixing pin pin 43 drawn out 43 drawn outof ofthe theouter outer frame frame body body brackets brackets 41 the 41 and and the
loading bed brackets loading bed brackets42, 42, the the fixing fixing pin pin 43 moves 43 moves in in association withthe association with theflap flap door door 12 12 when when the the flapflap door door 12 is12 is opened opened from from the the bottom. This can bottom. This can avoid avoid interference interference of of the the
fixing pin 43 fixing pin 43with witha aload load discharged discharged fromfrom the the loading loading bed bed 10. 10.
[0049]
[0049]
(6) (6) The movable handle The movable handle5555doubles doubles as as a grip a grip of the of the gate gate body body 16. Thus, aa handle 16. Thus, handle for for opening opening operation operation of of the the
gate body 16 gate body 16does doesnot notneed need to to be be separately separately disposed disposed on the on the gate gate body body 16. This can 16. This can also also suppress suppress increase increase in in the the number number
of components. of components.
[0050]
[0050]
-Modification Example- -Modification Example- Although description Although descriptionhas has been been made made by taking by taking as an as an example thecase example the caseininwhich which thethe rear rear wall wall bodybody of loading of the the loading
bed 10 bed 10 is is made madeinto intoa a flap flap door door in in the the above, above, the present the present invention canbebeapplied invention can applied also also to to a dump a dump truck truck in which in which the the sidewall 19 or sidewall 19 or2020isismade made into into a flap a flap doordoor and and what what is is
generally generally called called a a three-way three-way dump dump truck. In the truck. In the case case of of
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2023285846 22 May 2025
making the making the sidewall sidewall1919 or or thethe sidewall sidewall 20 into 20 into a flap a flap door,door, it is preferable it is preferabletotolimit limit thethe gate gate body body of aofside a side opening opening type to dimensions type to dimensionsequal equal to to or or smaller smaller thanthan halfhalf of the of the total lengthof total length ofthe thesidewall sidewall (the (the length length dimension dimension of the of the vehicle bodyininthe vehicle body thefront-rear front-rear direction) direction) or width or the the width of of
the rear wall the rear wallbody body(the (the length length dimension dimension of the of the vehicle vehicle body body 2023285846
in the left-right in the left-rightdirection) direction)in in terms terms of disposing of disposing a holding a holding member that member thatholds holdsthe the gate gate body body in in the the fully-opened fully-opened statestate on on
the loading bed the loading bed10. 10.
Description ofReference Description of Reference Characters Characters
[0051]
[0051]
1: Cab 1: Cab 2: Vehicle frame 2: Vehicle frame
10: Loading bed 10: Loading bed
12: Flap door 12: Flap door
15: Outer frame 15: Outer framebody body
16: Gate body 16: Gate body
41: Outer frame 41: Outer framebody bodybracket bracket
42: Loading bed 42: Loading bedbracket bracket
43: Fixing pin 43: Fixing pin
43a: Tip part 43a: Tip part(removal (removalprevention prevention mechanism) mechanism) 44: Chain 44: Chain 45: Pin holding 45: Pin holdinghole hole(holding (holding member member for for the the fixing fixing pin) pin) 51, 52: First 51, 52: Firstlock lockmember member
53: Second lock 53: Second lockmember member
55: Movable handle 55: Movable handle
25
2023285846 22 2025
[0052]
[0052]
Throughout thisspecification Throughout this specificationandand thethe claims claims which which May follow, unlessthe thecontext context requires otherwise, the word follow, unless requires otherwise, the word ‘comprise’, andvariations 'comprise', and variations such such as as ‘comprises’ 'comprises' and and ‘comprising’, willbebeunderstood 'comprising', will understood to to imply imply the the inclusion inclusion of a of a stated integerororstep stated integer steporor group group of of integers integers or steps or steps but not but not 2023285846
the exclusionofofany the exclusion anyother other integer integer or step or step or group or group of of
integers or steps. integers or steps.
[0053]
[0053]
The referenceininthis The reference thisspecification specification to any to any prior prior publication(or publication (orinformation information derived derived fromfrom it),it), or toorany to any
matter which matter whichisisknown, known,is is not, not, andand should should not not be taken be taken as anas an acknowledgment acknowledgment ororadmission admission or or anyany form form of suggestion of suggestion that that that prior publication that prior publication (or (or information information derived derived from from it) or it) or known matterforms known matter formspart part of of thethe common common general general knowledge knowledge in in
the field of the field ofendeavor endeavortoto which which this this specification specification relates. relates.
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2023285846 22 May 2025
THE CLAIMS DEFINING THE CLAIMS DEFININGTHE THE INVENTION INVENTION AREARE AS FOLLOWS: AS FOLLOWS: 1. 1. AA dump dump truck truck including including aa cab, cab, aa vehicle vehicle frame frame
disposed continuouslywith disposed continuously with a rear a rear part part of the of the cab, cab, a loading a loading bed tiltably bed tiltablymounted mountedover over thethe vehicle vehicle frame, frame, a flap a flap door door of of
a bottom edge a bottom edgeopening openingtype type that that configures configures a sidewall a sidewall of the of the loading bed, the loading bed, theflap flapdoor door including including an outer an outer frame frame body body and and 2023285846
a gate body, a gate body,the theouter outer frame frame body body being being pivotally pivotally attached attached to the loading to the loadingbed bedininsuch such a manner a manner thatthat a lower a lower part part side side pivots withan pivots with anupper upperpart part side side being being a fulcrum, a fulcrum, the gate the gate body being body being disposed disposedtoto close close an an opening opening of the of the outerouter frameframe body and body and pivotally pivotallyattached attached to to thethe outer outer frame frame body body in such in such a manner as a manner as to topivot pivotinin a horizontal a horizontal direction direction when when the the loading bed is loading bed islaid, laid,the the dump dump truck truck comprising: comprising: an outer frame an outer framebody bodybracket bracket disposed disposed on the on the outer outer frame body; frame body; a loading bed a loading bedbracket bracketdisposed disposed on on thethe loading loading bed; bed; a fixing pin a fixing pinthat thatfixes fixes the the outer outer frame frame bodybody bracket bracket and the loading and the loadingbed bedbracket; bracket;
a first lock a first lockmember memberthat that is is a fixed a fixed structural structural object object disposed onthe disposed on theouter outerframe frame body; body; a second lock a second lockmember memberthat that is is a fixed a fixed structural structural object disposedononthe object disposed theloading loading bed; bed; and and a movable handle a movable handlethat thatisis disposed disposed on the on the gategate body body and is capable and is capableofofselectively selectively engaging engaging withwith and and disengaging disengaging from the first from the firstlock lockmember member andand thethe second second locklock member. member. 2. The dump 2. The dump truck truck according according to to claim claim 1, 1, wherein wherein
positions ofthe positions of theouter outer frame frame body body bracket, bracket, the the loading bed bracket, loading bed bracket,and and the the first first lock lock member member correspond correspond to to
27
2023285846 22 May 2025
each other. each other. 3. The dump 3. The dump truck truck according according to to claims claims 11 or or 2, 2, wherein wherein
a tip of a tip of the thefixing fixingpin pin includes includes a removal a removal prevention prevention mechanism capable mechanism capableofofbending. bending.
4. The dump 4. The dump truck truck according according to to any any one one of of the the
preceding claims,wherein preceding claims, wherein 2023285846
the outer frame the outer framebody bodyisis coupled coupled to to the the fixing fixing pin pin through through aa chain chainand andhas has a holding a holding member member for for the the fixing fixing pin. pin. 5. The dump 5. The dump truck truck according according to to any any one one of of the the
preceding claims,wherein preceding claims, wherein
the movable handle the movable handledoubles doubles as as a grip a grip of the of the gategate body. body.
28
1/5 1/5
FIG.1 FIG.1 2023285846
3 3 1 1
10 10 19 19 53 53
OB 12 12
A 5 5 2 2 4 4 11 11
FIG.2 FIG.2
10 10
17 17 19 19 53 53 12 12
e
2/5 2/5
FIG.3 FIG.3 2023285846
10 10 17 17 18 18 12 12 28 16 16 50 55 55 55c 28 50 55c IV IV IV IV 25 25 27 27 54 55a 55a 29 54 29 28 51 28 57 57 55d 55d 51 26 26 15c 15c 27 27 15b 15b 54 54 55b 55b in 52 52 4 43 43 g 31 31 15 15 15a 15a 31 31 44 32 30 32 30 30 32 3032 42 41 42 44 4241142 40 40
FIG.4 FIG.4
12 12 28 28 16 16 55 55 15b 15b 15c 15c 27 27 54 54 51 51 29 28 29 28 55c 55c 50 50 25,26 25,26
3/5 3/5
FIG.5 FIG.5 2023285846
18 18 20 20
12 12 15c 15c 55a 55a 54 54 50 50 51 51 57 57 55d 55d 54 54 55 55 55b 55b 52 52
41 41 40 40 43 42 45 45 43 42
FIG.6 FIG.6 17 17
12 12 19 19
25 25 28 28 27 27
29 29 26 26 28 28 27 27
15b 15b
4/5 4/5
FIG.7 FIG.7 2023285846
15c 15c 55(55b) 55(55b) 12 12
52 43 43 15a 52 15a
43a 42 41 44 44 42 41 41 43a 41 42 42 40 40
FIG.8 FIG.8
15c 15c 55(55b) 55(55b)
52 52 45 45 41 41 43 43 40 40 42
5/5 5/5
FIG.9 FIG.9 2023285846
10 10 17 17 18 18
16 16
25 25 28 28 12 12 27 27 15c 15c 29 15b 15b 29 25 25 28 28 51 51 27 27 52 52
41 41 41 41 e 31 31 15 15a 15a 31 31 43 43 32 30 32 30 15 30 32 30 32 42 1 42 42 42 44 44 40
Claims (5)
1. A dump truck including a cab, a vehicle frame
disposed continuously with a rear part of the cab, a loading
bed tiltably mounted over the vehicle frame, a flap door of
a bottom edge opening type that configures a sidewall of the
loading bed, the flap door including an outer frame body and
a gate body, the outer frame body being pivotally attached
to the loading bed in such a manner that a lower part side
pivots with an upper part side being a fulcrum, the gate
body being disposed to close an opening of the outer frame
body and pivotally attached to the outer frame body in such
a manner as to pivot in a horizontal direction when the
loading bed is laid, the dump truck comprising:
an outer frame body bracket disposed on the outer
frame body;
a loading bed bracket disposed on the loading bed;
a fixing pin that fixes the outer frame body bracket
and the loading bed bracket;
a first lock member that is a fixed structural object
disposed on the outer frame body;
a second lock member that is a fixed structural
object disposed on the loading bed; and
a movable handle that is disposed on the gate body
and is capable of selectively engaging with and disengaging
from the first lock member and the second lock member.
2. The dump truck according to claim 1, wherein
positions of the outer frame body bracket, the
loading bed bracket, and the first lock member correspond to each other.
3. The dump truck according to claims 1 or 2, wherein
a tip of the fixing pin includes a removal prevention
mechanism capable of bending.
4. The dump truck according to any one of the
preceding claims, wherein
the outer frame body is coupled to the fixing pin
through a chain and has a holding member for the fixing pin.
5. The dump truck according to any one of the
preceding claims, wherein
the movable handle doubles as a grip of the gate
body.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022210116A JP2024093609A (en) | 2022-12-27 | 2022-12-27 | dump truck |
| JP2022-210116 | 2022-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2023285846A1 AU2023285846A1 (en) | 2024-07-11 |
| AU2023285846B2 true AU2023285846B2 (en) | 2025-06-26 |
Family
ID=91763022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2023285846A Active AU2023285846B2 (en) | 2022-12-27 | 2023-12-21 | Dump truck |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2024093609A (en) |
| AU (1) | AU2023285846B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2445809A (en) * | 2007-06-16 | 2008-07-23 | George Robert Boden | Tailgate with multiple pivot axes |
| AU2007292650B2 (en) * | 2006-08-30 | 2011-06-02 | Shinmaywa Industries, Ltd. | Dump car |
| DE202018104083U1 (en) * | 2018-07-16 | 2018-08-20 | Uwe Bockelmann | Vehicle with tilting loading platform, retrofit kit and tailgate |
| US20220063474A1 (en) * | 2019-03-01 | 2022-03-03 | Industries Fabkor Inc. | Vehicle container, vehicle container door and system for assembling a door to a vehicle container |
-
2022
- 2022-12-27 JP JP2022210116A patent/JP2024093609A/en active Pending
-
2023
- 2023-12-21 AU AU2023285846A patent/AU2023285846B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2007292650B2 (en) * | 2006-08-30 | 2011-06-02 | Shinmaywa Industries, Ltd. | Dump car |
| GB2445809A (en) * | 2007-06-16 | 2008-07-23 | George Robert Boden | Tailgate with multiple pivot axes |
| DE202018104083U1 (en) * | 2018-07-16 | 2018-08-20 | Uwe Bockelmann | Vehicle with tilting loading platform, retrofit kit and tailgate |
| US20220063474A1 (en) * | 2019-03-01 | 2022-03-03 | Industries Fabkor Inc. | Vehicle container, vehicle container door and system for assembling a door to a vehicle container |
Non-Patent Citations (1)
| Title |
|---|
| Barn door and spreader combo gate on Texas Pride Dump Trailer [viewed on internet 7/2/2025]. < URL: https://www.youtube.com/watch?v=ZboWGWqkJeU >, published 28 September 2018. * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024093609A (en) | 2024-07-09 |
| AU2023285846A1 (en) | 2024-07-11 |
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