JPS6328034Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to the structure of the operating lever receiver for the sliding door in a three-way dump truck.

(B) Conventional technology and its problems Conventionally, in a three-way dump structure that dumps to the front or left and right sides of a loading platform, an engagement mechanism for opening and closing the sliding doors on three sides is provided, but such engagement mechanism The mechanism is configured to engage each sliding door by means of an operating lever of the operating section.

However, there was a drawback that it was easy to forget to operate the operating lever to engage each sliding door, and it was not reliable and safe.

(C) Means for solving the problem In this invention, in a three-way dump truck that has a cargo platform on the fuselage frame that can be dumped forward or to the left or right, a front sliding door is opened on the underside of the platform. The front sliding door operating link mechanism and the left and right side sliding door operating link mechanisms that open the left and right side sliding doors are formed, and the left and right operating levers that operate the front sliding door operating link mechanism are located at the left and right ends of the loading platform. A flat operation lever receiver, which is provided in the section and interlocks with the operation lever, is installed on the axis of the pivot part that dumps to the left and right sides of the cargo platform at both ends of the horizontal frame installed in the middle of the fuselage frame, Left and right operating levers that operate the left and right side sliding door operating link mechanisms are provided at the rear left and right ends of the loading platform, and flat operating lever receivers that interlock with the operating levers are provided on the dumping machine frame in front of the loading platform. An object of the present invention is to provide an operation lever receiver structure for a sliding door in a three-way dump truck, which is characterized in that it is attached to the right and left ends of a pivot shaft and on the axis of a pivot part that dumps left and right sides.

(d) Example The example of the present invention will be explained in detail based on the drawings.
A indicates a three-way dump truck, in which a driving section 1 and an engine section E are provided at the rear of the fuselage frame a, and a loading platform 2 is provided in front of the driving section 1 and engine section E.

Further, a crawler track 3 serving as a traveling mechanism is disposed at the lower part of the body frame a.

Further, a hydraulic cylinder 4 is interposed between the center of the loading platform 2 and the body frame a, and the hydraulic cylinder 4 allows the loading platform 2 to be freely dumped forward or to the left or right side.

Moreover, such a loading platform 2 performs a dumping operation to both the left and right sides or to the front by switching the engagement of the clamps on both the left and right sides or the front by operating a single switching lever 5 provided in the driving part 1. be able to.

FIG. 2 is a bottom view of the loading platform 2, and shows a configuration diagram of the link mechanism for opening and closing the front sliding door and the left and right side sliding doors, where L1 is the front sliding door operating link mechanism that opens the front sliding door 6; L2 is a left side swing door operation link mechanism that opens the left side swing door 7, and L3 is a right side swing door operation link mechanism that opens the right side swing door 8.

The front sliding door operation link mechanism L1 has a claw body 9 at the tip extending forward.
is attached to the lower front end of the loading platform 2 and engages with an engagement receiver 10 provided on the front sliding door 6.

Further, the base end of the front sliding door operation link mechanism L1 is attached to the left and right sides of the loading platform 2 and pivoted in the front and back direction, and the link mechanism L1 is interlocked with the left and right ends of the link mechanism L1. Left and right operating levers R1 and R1' are mounted so as to be rotatable in the front and rear directions.

Further, the left side sliding door operation link mechanism L2 is provided with a claw body 11 at the tip extending to the left side of the loading platform 2,
The link mechanism L2 is engaged with the engagement receiver 12 provided on the left end of the lower surface of the loading platform 2, and the base end of the link mechanism L2 is extended to the rear right side of the loading platform 2, and the link mechanism L2 is connected to the base end of the link mechanism L2.
2 is connected to the right end of the lower surface of the loading platform 2 so as to be rotatable in the left-right direction.

In addition, the right side sliding door operation link mechanism L3 is provided with a claw body 13 at the tip extending to the right side of the loading platform 2,
The link mechanism L3 is engaged with the engagement receiver 14 provided at the right end of the lower surface of the loading platform 2, and the base end of the link mechanism L3 is extended to the rear left side of the loading platform 2, and the link mechanism L3 is connected to the base end of the link mechanism L3.
3 is connected to the left end of the lower surface of the loading platform 2 so as to be rotatable in the left-right direction.

Note that the engagement and disengagement between the claw body 9 and the engagement receiver 10, the engagement and disengagement between the claw body 11 and the engagement receiver 12, and the engagement and disengagement between the claw body 13 and the engagement receiver 14 are performed when the loading platform 2 is in the front. Alternatively, when dumping the vehicle to the left and right sides, each operating lever R1, R1', R2, or R3 is operated to open the swing door in the dumping direction. Further, as the loading platform 2 returns to the horizontal state from the dumping state, the operating levers R1, R1',
R2 and R3 are each operated, and each claw body and engagement receiver engage, thereby fixing the sliding door.

In FIG. 3, r1 and r1' are the left and right operation levers R1 and R of the front sliding door operation linkage mechanism L1.
It is an operating lever receiver that is linked with r2,
r3 is the left and right side sliding door operation link mechanism L2,L
This is the operation lever receiver for the operation levers R2 and R3 of No. 3.

The operating lever receivers r1, r1' are formed in a circular shape with a flat upper surface, and are welded to both ends of the horizontal frame 15 installed in the middle of the fuselage frame a. r1′
Accordingly, the operating levers R1 and R1' are interlocked.

In addition, the operation lever receivers r2 and r3 are shown in FIG.
As shown in FIGS. 3 and 4, receiver support portions M that are approximately L-shaped in side view are provided protruding from the back surfaces of the bearing stands 16 and 16' at the left and right ends of the pivot shaft 17 on which the cargo platform 2 is dumped forward. At the same time, a lever receiver M1 with a flat upper surface is attached to the upper end of the support part M, facing left and right. Rotate as one.

In addition, the operating lever receivers r2 and r3 that interlock with the operating levers R2 and R3 are arranged with their upper surfaces oriented in the left-right direction so that the operating levers R2 and R3 rotate in the left-right direction. When the vehicle is dumped in the opposite direction, the operating levers R2 and R3 are pressed by the operating lever receivers r2 and r3, respectively.

As shown in FIG.
When performing forward dumping, the operating lever receivers r2 and r3 attached to the operating lever receivers r2 and r3, respectively, are in a pressed state as the bearing stands 16 and 16' rotate about the pivot shaft 17. Dumping is still being carried out, and therefore the left and right sliding doors 7 and 8 are in a fixed state.

Moreover, the operating lever receivers r1 and r3 are located on the axis l1 of the pivot parts 24 and 25 that are dumped to the left side.
Further, the operating lever receivers r1' and r2 are mounted on the axis l2 of the pivot parts 26 and 27 which are dumped to the right side.

With this structure, when the dump operation is performed to the left, the operating levers R1 and R3 are moved to the operating lever receiver r.
1 and r3, the front swinging door and the right side swinging door link mechanisms L1 and L3 are brought into an engaged state, and the front swinging door 6 and the right side swinging door 8 are brought into a closed state.

On the other hand, the operation levers R1' and R2 are separated from the operation lever receivers r1' and r2, and the left side swing door 7 is opened by operating the left side swing door operation link mechanism L2.

In FIG. 3, reference numeral 18 denotes a substantially L-shaped lever, which is interlocked and connected to left and right rear flaps 20 and 20' via a rear engagement notch member 19.
It is interlocked and connected to a front engaging notch member 22 via an interlocking rod 21, and left and right front clamps 23 and 23' are connected from the switching member 22.

In FIG. 3, 24, 25, 26, and 27 are pivot rod receiving grooves for the pivot rods 24', 25', 26', and 27', respectively.

(E) Function The embodiment of the present invention is constructed as described above, and as the loading platform 2 is dumped to the front or left and right sides, the operation lever R of each link mechanism is
1, R1', R2, R3 are the operating lever receiver r1,
The operating levers R1, R1', R2, R are configured to operate on the flat surfaces of the upper surfaces of r1', r2, r3.
3 is pressed by the lever receivers r1, r1', r2, r3, and the operating levers R1, R1', R2, R3 rotate around the pivot parts L, L', m, n, and each link Mechanisms L1, L2, and L3 operate, and the engagement between the claw body 9 and the engagement receiver 10 is disengaged, or the engagement between the claw body 11 and the engagement receiver 12 is disengaged, or the engagement between the claw body 11 and the engagement receiver 12 is disengaged. The engagement with the engagement receiver 14 is disengaged, and the loading platform 2
The sliding doors 6 and 7 or 8 are configured to open when the dumping operation is performed.

At this time, the upper surfaces of the lever receivers r1, r1', r2 and r3 are all formed horizontally to facilitate the operation of the operating lever, r1 and r3 are on the axis l1, and r1' and r2 are on the axis l2. This is convenient when the loading platform 2 is dumped forward or left or right.

Furthermore, since the operating lever of each link mechanism is located on the axis of the pivot part that dumps left and right,
If the vehicle is dumped to either the left or right, the other two-way link mechanisms will not operate and the sliding door will be closed.

In addition, since the lever receivers linked to each operating lever have flat upper surfaces,
By attaching and detaching each lever, it is operated reliably, and the sliding door is smoothly engaged and released, and the dumped cargo platform is lowered onto the fuselage frame.
When the sliding door is completely closed to the loading platform, each link mechanism is operated in conjunction with the operating lever to engage the sliding door.

(f) Effects According to the present invention, since the upper surface of the sliding door operating lever receiver is formed into a smooth shape, the sliding door operating lever can slide smoothly, and the link mechanism operates smoothly and reliably to open and close the sliding door. is reliable, and since the swing door operating lever receiver r1' is configured to be located on the axis l2 and the swing door operating lever receiver r1 is located on the axis l1, a simple configuration is possible when forward dumping. The engagement and disengagement between the claw body and the engagement receiver is ensured, and the sliding door can be opened and closed safely and securely, or when dumping on both the left and right sides, the engagement receiver of the front sliding door is securely engaged. There is an effect that dumping work can be performed safely without the front sliding door being opened even if the front sliding door is accidentally opened during dumping on both the left and right sides.

Furthermore, since the operating lever of each link mechanism is located on the axis of the pivot part that dumps left and right,
If dumped in one direction, the other two-way linkage mechanism will not operate and the sliding door can be closed.

In addition, since the lever receivers that are linked to these operating levers have flat upper surfaces, they can be operated reliably by simply attaching and detaching each lever, and the sliding door can be smoothly engaged and released. In addition, when the dumped cargo bed is lowered onto the aircraft frame and the sliding door is completely blocked by the cargo bed, each link mechanism is operated in conjunction with the operation lever, and the sliding door is engaged. This allows the sliding door to be securely fixed.

[Brief explanation of the drawing]

FIG. 1 is a side view of the three-way dump truck, FIG. 2 is a structural diagram of the link mechanism, FIG. 3 is a layout diagram of the present invention, and FIG. 4 is a perspective view of the present invention. 2: Loading platform, 6, 7, 8: Sliding door, 9, 11, 1
3: Claw body, 10, 12, 14: Engagement receiver, 15:
Horizontal frame, 16, 16': Bearing stand, 17: Pivot, a: Airframe frame, L1, L2, L3: Link mechanism, R1, R1', R2, R3: Operation lever,
r1, r1', r2, r3: operation lever receiver, l
1, l2: Axis line.

Claims (1)

[Scope of Claim for Utility Model Registration] In a three-way dump truck configured to dump a loading platform 2 on a body frame a to the front or left and right sides, a front sliding door that opens a front sliding door 6 on the lower surface of the loading platform 2. Operation link mechanism L1 and left and right side swinging doors 7,
Left and right side sliding door operation link mechanism L that opens 8.
2, L3, and left and right operating levers R that actuate the front sliding door operating link mechanism L1.
1, R1' are provided at the left and right ends of the loading platform 2, and flat operating lever receivers r1, r1' that interlock with the operating levers R1, R1' are installed in the middle of the fuselage frame a. loading platform 2 at both ends of
The axes l1 and l2 of the pivot parts that dump to the left and right sides of
The left and right operating levers R are installed on the top and operate the left and right side sliding door operating link mechanisms L2 and L3.
2 and R3 are provided at the rear left and right side ends of the loading platform 2, and a pivot 17 provided on the fuselage frame a that dumps flat operating lever receivers r2 and r3 that interlock with the operating levers R2 and R3 to the front of the loading platform 2. An operation lever receiver structure for a sliding door in a three-way dump truck, characterized in that it is attached to the right and left ends of the truck and on the axes l1 and l2 of the pivot parts that dump to the left and right sides.