JPS6227473Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a loading platform supporting member that is rotatable around a first axis facing in the left-right direction of the vehicle body at one end in the longitudinal direction of the vehicle body, and supports the loading platform when the loading platform is in a seated state. The first hook is on the right side of the member and the second hook is on the left side.
A third hook is provided on the right side of the vehicle body, and a fourth hook is provided on the left side of the vehicle body, each of which is freely connectable and biased toward the connection release side. Then, with the first and third hooks connected, the loading platform is moved around the second axis, and with the second and fourth hooks connected, the loading platform is moved around the third axis. The second and third shafts are configured to move in the longitudinal direction of the vehicle body on both left and right ends of the vehicle body and the first axis
A dump truck is provided so as to be swingable around one of the shafts, and a swing plate is provided on the loading platform so as to be swingable around the horizontal shaft on the upper edge side thereof so as to open and close the load release port in conjunction with the dumping operation. A hook for pivotally connecting and engaging and disengaging the lower edge side of the tilt plate is swingably provided on the loading platform in a state where it is biased toward the disengagement side, and the hook is attached to the hook to connect with the vehicle body. The present invention relates to a mounting structure for a three-way dump platform, in which abutting members for forcibly swinging toward the engagement side are interlocked and connected to maintain the hook in the engaged state when the platform is seated. .

In the above device, when the loading platform is lifted up around the first axis, due to the weight of the loading platform, the pivot shaft provided on the loading platform is attached to the receiving part provided on the loading platform support member. On the other hand, it slides while maintaining the connection state by the first and second hooks, and the entire cargo platform is in a state closer to the first axis than the center of the vehicle body with respect to the vehicle body, and after the cargo platform is seated, the dump shaft center is When the dump shaft is switched and the dump shaft is swung around the second or third axis to seat it, one of the brackets that pivotally supports the spindle rides on the receiving part, and when the dump shaft is switched in this state, the support If the first or second hook is connected to the support shaft without the shaft being inserted into the receiving portion and supported, a connection failure may occur, and there is a risk that the cargo platform may separate from the vehicle body and fall as the vehicle is dumped.

In view of the above points, the present invention is a simple improvement that makes effective use of the original structure, while suppressing as much as possible the sliding movement of the support shaft relative to the receiving part when the loading platform rises around the first axis. It is an object of the present invention to provide a support shaft that is reliably supported by a receiving part so that dumping of any of the first to third shafts can be performed satisfactorily.

In order to achieve the above object, the present invention provides the mounting structure for the three-way dump platform described above, in which the hook of the contact member is linked to the hook that is swung by the dump truck around the first axis. A cam body that acts to displace the loading platform in a direction opposite to the first axis when the connected body comes into contact with the connected one;
Of a pair of brackets provided on the vehicle body and protruding from the loading platform for pivotally supporting a support shaft for engaging and disengaging the first and second hooks, the one on the side farther from the cam body is the one on the nearer side. The amount of protrusion is larger than that of the cam, and when the loading platform is seated, the loading portion is brought into contact with the receiving part of the support shaft connected to the loading platform support member, thereby causing the loading platform to be attached to the cam. It is characterized by being provided with a cam surface that is displaced in a direction opposite to the direction of displacement caused by the action of the body.

In other words, the hook provided on the loading platform is effectively used to open and close the tilt plate, and as the loading platform is seated, the contact member acts on the cam body to close the hook. When the loading platform is moved to the opposite side of the first axis, and then the dumping axis is switched and the loading platform is swung around the second or third axis, the bracket is moved as the loading platform is seated. The cam surface contacts the receiving portion and displaces the loading platform in a direction opposite to the direction of displacement by the cam body, and the support shaft is reliably positioned at a predetermined location by the displacement action of the cam body and the cam surface on the loading platform. It is held in the receiving part in this state.

Therefore, even with a simple improvement such as providing a cam body, protruding one of a pair of brackets, and providing a cam surface there, the clearance between both brackets and the receiving part can be reduced, and the clearance around the first axis can be reduced. Although it is possible to suppress the sliding movement of the support shaft relative to the receiving part as much as possible when the dump truck is raised, the loading platform is forcibly displaced in the longitudinal direction of the aircraft when seating
It is possible to reliably avoid the bracket from riding on one of the receiving parts, and regardless of whether or not the dump shaft core is switched, the support shaft is always securely received and held in the receiving part, and the support shaft is securely held by the first or second hook. The platform can now be swung while connected to the vehicle, making dumping extremely safe without causing any accidental separation from the vehicle body.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

A control unit 2 is provided at the rear of the vehicle body equipped with the crawler type traveling device 1, and a cargo platform 3 is provided in front of the control unit 2.
are provided so as to be able to swing freely through a hydraulic cylinder 4 to form a driving dump truck.

In order to provide the loading platform 3, a loading platform support member 6 is provided on the front end side of the vehicle body frame 5 so as to be swingable around a first axis _P1 facing in the left-right direction of the vehicle body, and the loading platform support member 6 is provided on the right side of the vehicle body when viewed from the front. A first cargo platform pivot portion 7 is provided on the left side of the vehicle body, and a second cargo platform pivot portion 8 is provided on the left side of the vehicle body.
On the side of the vehicle body near the control section 2, a third cargo platform pivot portion 9 is provided on the right side of the vehicle body, and a fourth cargo platform pivot portion 10 is provided on the left side. a state in which the dump truck is swung around the first axis _P1 by being connected to the loading platform pivot parts 7 and 8;
A state in which the dump truck is swung around a second axis _P2 connected to the first and third loading platform pivots 7 and 9 and facing in the front-rear direction on the right side of the vehicle body; , 10 to swing the dump truck around the third axis P ₃ facing in the front-rear direction on the left side of the vehicle body, and the loading platform 3 can be rocked to either the front of the vehicle body or to the left or right side of the vehicle body. It is structured as follows.

Said first to fourth loading platform pivot supports 7, 8, 9, 1
0 is a support shaft 1 connected to the support member 6 and the receiving part 12 connected to the vehicle body frame 5, respectively, on the loading platform 3 side.
3 is configured to be able to be supported internally, and is swingable near each so as to be able to change between a disconnected state that allows the support shaft 13 to come off from the receiving part 12 and a connected state that prevents the support shaft 13 from coming off. , 1st to 4th
Hooks 14, 15, 16, 17 are provided, and first and second hooks 14, provided on the support member 6,
15 are biased by tension springs 18, 18 so as to swing toward the connection side, and on the other hand, the third and fourth hooks 16, 1 provided on the vehicle body frame 5 are
7 is biased by tension springs 19, 19 so as to swing toward the disconnection side.

A rotating shaft 2 is attached to the vehicle body frame 5, offset from the left and right center of the vehicle body frame 5, and rotatable around the longitudinal axis of the vehicle body.
0 is mounted on an axis, and an operating member 21 is provided on the control unit 2 side so as to be able to swing left and right around an axis parallel to the rotating shaft 20. The vehicle body can swing freely around the left-right axis, and the left-right swing can be performed integrally.
While attaching the operating tool 22, the operating member 2
1 and the rear end of the rotating shaft 20 are interlocked and connected via a swing link 23, so that the operating tool 22 and the rotating shaft 20 are rotated in the same direction.

The operating member 21 and the third and fourth hooks 1
6 and 17 are interlocked and connected via rods 24, respectively, and the tension springs 19 and 19 are provided on each of the rods 24 and 24, and when the operation tool 22 is not operated, both springs 19 and
The operating tool 22 is fixedly maintained in a state where the loading platform 3 is dumped around the first axis _P1 by the biasing force 19.

An engagement pin 25 is attached to the lower end of the loading platform support member 6 at a location corresponding to above the front end of the rotating shaft 20, so as to be able to swing freely around the longitudinal axis of the vehicle body parallel to the rotating shaft 20 when the loading platform is seated. first member 26
are provided, and the first member 26 and the first and second hooks 1
4 and 15 are interlocked and connected via bent links 27 and 27, and on the other hand, a second member 28 is provided to protrude upward on the front end side of the rotating shaft 20, and a notch with an upward opening is provided in the second member 28. forming a portion 29;
In addition, the length of the notch 29 is set so that the length of the notch 29 is set within the entire range regardless of the swinging of the loading platform support member 6 as the loading platform ₃ is dumped around the first axis P1, that is, regardless of the swinging of the first member 26. The engagement pin 25 is set to a length that allows rocking while maintaining the engagement state, and the first axis P ₁
The structure is such that the pin 25 will not come off from the notch 29 even if the loading platform 3 is raised and dumped to the maximum position.

With the above configuration, in the non-operating state, the first and second hooks 14 and 15 are kept biased in the connected state to perform dumping around the first axis _P1 , and the operating tool 22 is viewed from the front. With the vehicle body swung to the right side and locked to the locking portion 30a on one end side of the guide groove 30, only the first and third hooks 14 and 16 are connected and rotated around the second axis _P2. On the other hand, the operating tool 22 is swung to the left side of the vehicle body when viewed from the front, and the second and fourth hooks 15, Only 17 is connected and dumping is performed around the third axis _P3 .

To configure the loading platform 3, a pair of struts 31, 31, 32, 32 are provided on each of the front and rear sides, and upper and lower struts are provided between the front and rear struts 31, 32 on the left and right sides of the vehicle body, and between the front left and right struts 31, 31, respectively. A tilt plate 33 is pivotally connected to be swingable around a horizontal axis Q on the edge side.

In order to erect each of the front columns 31, 31, a rectangular cylindrical fitting portion 35, into which the lower end of the column 31 is removably fitted, is provided on each of the left and right ends of the front end of the loading platform frame 34, A pair of upper and lower adjustment bolts 3 are provided on each of the outward facing side and front sides of the fitting portion 35.
6... are screwed, and on the other hand, a reinforcing member 38... is provided below the collar body 37 of the support column 31, and the tip of the bolt 36... is pressed against a part of the reinforcing member 38... Yes, pushing with bolt 36...
The pillars 31, 31 are configured to be erected in a desired posture by adjusting the fixing positions using lock nuts 39.

First to third hooks 40, 4 for support shafts 33a attached to the lower ends of tilt plates 33 on the front, right and left sides of the vehicle body, respectively, on the lower surface of the bottom plate of the cargo platform 3.
1 and 42 are pivotally connected to each other so as to be able to swing freely, and regardless of the dump axis P ₁ , P ₂ , P ₃ , the lower part of the dumped cargo platform 3 is linked to the dumping operation of the cargo platform 3. It is configured to automatically engage and disengage from the tilt plate 33 located at the position, and will be described in detail next.

That is, as shown in FIGS. 9 to 11, the first hook 40 is provided with a pair of swinging levers 43a integral with a rotating shaft 43 provided on the lower surface of the loading platform 3 so as to be rotatable about a horizontal axis. 1st hook of 40,40
The azimuth rod 44 and the intermediate link 4 respectively.
5, and are interlocked and connected via a telescopic rod 47 with a buffer spring 46 interposed therebetween, and a spring 48 is stretched across the telescopic rod 47 and the loading platform 3.
The hook 40 is urged to swing in the direction of releasing the engagement with the support shaft 33a, and at each end of the rotating shaft 43 and in a plan view,
Abutment members 50 each having a roller 49 freely rotatable at its tip are provided in succession at locations close to the second and third axes P ₂ and P ₃ when the loading platform 3 is seated. , when the loading platform 3 is seated, the contact members 50, 5
0, a cam body 51 is provided at a position corresponding to each of the rollers 49 to forcibly swing the first hook 40 toward the side where it engages with the support shaft 33a while resisting the biasing force of the spring 48. During dumping around the second and third axes P ₂ and P ₃ , one of the rollers 49, 49 always acts on the cam body 51 to engage the first hook 40 with the support shaft 33a. While maintaining the front tilt plate 33 in a closed state at all times, when dumping around the first axis _P1 , both rollers 49, 49 move toward the cam bodies 51, 51 as the dumping occurs.
The first hooks 40, 40 are separated from the support shafts 33a, 33a by the urging force of the spring 48, and only the front tilt plate 33 swings under its own weight relative to the loading platform 3, and the load release port is automatically opened. On the other hand, as the loading platform 3 is seated, both rollers 49, 49 come into contact with the cam bodies 51, 51, forcefully swinging the first hooks 40, 40, and engage the support shafts 33a, 33a. It is configured to maintain the front tilt plate 33 in a closed state.

The cam bodies 51, 51 are each provided with a roller 49 in contact with a curved surface facing toward the rear of the vehicle body, and when dumping around the first axis _P1 ,
Even if the loading platform 3 is displaced forward with respect to the vehicle body due to its own weight in the lifted state of the dump truck, as the loading platform 3 is seated, the rollers 49, 49 contact the cam bodies 51, 51, and the first hooks 40, 40 is the support shaft 33a, 3
3a, and further, in the engaged state, the loading platform 3 is lowered, and accordingly, the abutment member 50 is pressed and displaced toward the rear of the vehicle body, that is, the entire loading platform 3 is moved toward the first axis P ₁ It is configured to be displaced to the opposite side.

When the second and third hooks 41, 41, 42, and 42 are provided, the linkage mechanisms therefor are configured symmetrically with respect to the left-right center line of the vehicle body when the loading platform 3 is seated, and then the second and third hooks 41, 42, and Hook 41,
41 will be explained as an example.

That is, as shown in FIG. 9, FIG. 11, and FIG. 12, at the front part on the opposite side to the mounting side of the second hooks 41, 41, there is a rotatable part on the lower surface of the loading platform 3 about the axis in the longitudinal direction of the vehicle body. A rotating shaft 52 is freely provided, and the second hooks 41, 41 and the rotating shaft 52 are pivotally connected to an adjuster rod 53, an intermediate link 54 that pivotally connects the intermediate rotating shaft 52a, and a buffer spring 55.
A spring 57 is interlocked and connected via a telescopic rod 56 interposed therein, and a spring 57 is connected between the telescopic rod 56 and the loading platform 3.
is tensioned to urge the second hook 41 to swing in the direction of releasing the engagement with the support shaft 33a, and on the front end side of the rotating shaft 52 and on the loading platform 3 in plan view. A contact member 59 having a roller 58 freely rotatable at its tip is provided at a location close to the first axis P ₁ in the seated state, and on the other hand, the contact member 59 of the vehicle body frame 5 is connected to the cargo platform 3 in the seated state. A spring 57 acts on the roller 58 at a position corresponding to the member 59.
The second hook 41 is moved to the support shaft 33 while resisting the urging force of
A protruding guide plate 60 is provided for forcibly swinging toward the side that engages with a, and the roller 58 is constantly guided during dumping around the first and third axes P ₁ and P ₃ . It acts on the plate 60, engages the second hook 41 with the support shaft 33a, and moves the tilt plate 3 on the right side of the vehicle body as seen from the front.
3 is always kept closed, the second axis P ₂
When dumping in the surrounding area, the roller 5
8 is separated from the guide plate 60, and due to the biasing force of the spring 57, the second hooks 41, 41 are moved to the support shaft 33.
a, 33a, and tilt plate 33 on the right side of the vehicle body.
The roller 58 swings under its own weight relative to the loading platform 3 and automatically opens the load release port, and on the other hand, as the loading platform 3 is seated, the roller 58 comes into contact with the guide plate 60 and the second hook 41,
41 is forcibly swung and engaged with the support shafts 33a, 33a to maintain the tilt plate 33 on the right side of the vehicle body in a closed state.

In order to attach the support shafts 13 and 13 for engaging and disengaging the first and second hooks 14 and 15 to the loading platform 3, the first
As shown in FIG. 3, a pair of brackets 61a and 61b are spaced apart from the loading platform 3 by a predetermined distance in the longitudinal direction of the vehicle body, and the distance between them is approximately equal to the length of the receiving portion 12 in the longitudinal direction of the vehicle body. In both brackets 61a and 61b,
The front side bracket 61a, which is farther from the center of the vehicle body, is configured to protrude more than the rear side bracket 61b, and the front end side of the projecting portion is provided with a cam surface F, which faces toward the front of the vehicle body as the front end approaches when the cargo platform 3 is seated. Even if there is a misalignment between the loading platform 3 and the vehicle body due to twisting or the like when the loading platform 3 is seated, the cam surface F will come into contact with the receiving part 12, and the loading platform 3 will be placed in the position of the cam body 51. The support shaft 13 is configured to be displaced toward the front side of the vehicle body opposite to the direction of displacement by the action, and to be reliably received and supported by the receiving portion 12, and the rear bracket 61b of the front bracket 61a. The amount of protrusion is large even in the part parallel to the brackets 61a and 61b, and the receiving part 12 can be sufficiently held by both brackets 61a and 61b to prevent accidental dislodgement due to vibrations of the machine while traveling, etc.
When the dump truck rises around the first axis _P1 , the loading platform 3 is reliably prevented from swinging upward in advance of the loading platform support member 6 by bringing the tip E of the parallel portion into contact with the front surface of the receiving portion 12. It is structured as follows.

In addition, a bracket 62 pivotally supports the support shafts 13, 13 for engaging and disengaging the third and fourth hooks 16, 17, respectively.
a, 62b are the brackets 6 on the front side of the vehicle body;
1a and 61b, or may have the same protrusion amount and no cam surface F; It may be something that constitutes.

In the above embodiment, the abutting members 50, 59 are configured with rollers 49, 50 attached to their tips so as to act on the cam body 51 and the guide plate 60 with less frictional resistance. , roller 4
The contact members 50 and 59 may be brought into direct sliding contact with the cam body 51 and the guide plate 60, respectively, without providing the contact members 9 and 58.

[Brief explanation of the drawing]

The drawings show an embodiment of the mounting structure for a three-way dump truck according to the present invention, in which FIG. 1 is an overall side view of the dump truck, FIG. 2 is a partially omitted plan view of the main parts, and FIG. Fig. 4 is a sectional view taken along the - line in Fig. 2, Fig. 5 is a partially cutaway side view showing the operating mechanism, Fig. 6 is a perspective view of the main parts, and Fig. 7 is a support column. Figure 8 is a partially exploded perspective view showing the mounting part, Figure 8 is a partially cutaway side view of the column mounting part, Figure 9 is a bottom view of the loading platform,
Figure 0 is a - line sectional view of Figure 9, Figure 11 is a cross-sectional view of Figure 9.
Figure 12 is a cross-sectional view taken along the line XI-XI, and Figure 12 is XII-XII in Figure 9.
The line sectional view, FIG. 13 is a view taken along the - line arrow in FIG. 3... Loading platform, 6... Loading platform support member, 12... Receiving portion, 13... Support shaft, 14... First hook, 15
...Second hook, 16...Third hook, 17...
4th hook, 33... tilt plate, 40... hook, 50... contact member, 51... cam body, 61
a, 61b... Bracket, P ₁ ... First axis, P ₂
...Second axis, P ₃ ...Third axis, F...Cam surface.

Claims (1)

[Scope of utility model registration request] A loading platform support member 6 is provided on the vehicle body so as to be rotatable around a first axis P ₁ facing in the left-right direction of the vehicle body at one end in the longitudinal direction. One hook 14 is provided on the left side, and a second hook 15 is provided on the left side, each of which can be freely disconnected and urged toward the connection side, and a third hook 16 is provided on the right side of the vehicle body, and a fourth hook 17 is provided on the left side.
The loading platform 3 is provided around the second axis P ₂ with the first and third hooks 14 and 16 connected, and is provided in a state in which they are respectively connectable and biased toward the connection release side, and
With the second and fourth hooks 15 and 17 connected, the loading platform 3 is configured to swing around a third axis P ₃ , and the first axis P ₁ is connected to the left and right ends of the vehicle body. The dump truck is provided so as to be swingable around either of the second and third axes P ₂ and P ₃ facing in the longitudinal direction of the vehicle body, and the loading platform 3 is configured to open and close a load discharge port in conjunction with the dump operation. , the tilt plate 33 is pivotably connected around the horizontal axis of the upper edge side thereof, and a hook 40 for engaging and disengaging the lower edge side of the tilt plate 33 is biased toward the disengagement side. The hook 40 is swingably provided on the loading platform 3 in the state of
A contact member 50 for forcibly swinging the hook toward the engagement side by contact with the vehicle body is interlocked to maintain the hook 40 in the engaged state when the loading platform 3 is seated. In the mounting structure of a three-way dump bed configured as follows, the abutment member 50 includes:
When the hook 40 is brought into contact with the hook 40, which is oscillated by the dump truck around the first axis _P1 , the loading platform 31 is moved to the side opposite to the first axis _P1 . A cam body 51 that acts to displace the
of a pair of brackets 61a and 61b that are provided on the vehicle body and protrude from the loading platform 3 to pivotally support the support shaft 13 that engages and disengages the first and second hooks 14 and 15, respectively. The part 61a on the far side from the cam body 51 has a larger protrusion amount than the part 61b on the closer side, and the support connected to the platform support member 6 is attached to the protruding portion when the loading platform 31 is seated. A three-way dump loading platform, characterized in that it is provided with a cam surface F that displaces the loading platform 3 in a direction opposite to the displacement direction caused by the action of the cam body 51 when the shaft 13 comes into contact with the receiving part 12. mounting structure.