JP6275563B2 - Carrier truck and dump truck equipped with the carrier truck - Google Patents

Description

  The present invention relates to a loading platform of a transport vehicle that transports a transport target such as earth and sand, and particularly relates to a loading platform structure that suppresses adhesion of a load.

  A dump truck, which is an example of a transport vehicle, includes a body frame on which four wheels are arranged. A driver's cab and a control box are arranged at the front upper part of the vehicle body frame. Further, a loading platform is attached to the body frame from the center to the rear on the body frame. The loading platform is connected to the vehicle body frame by a hinge pin attached to the rear of the vehicle body frame and a hoist cylinder attached to the front of the vehicle body frame from the hinge pin. Then, as the hoist cylinder expands and contracts, the side of the cargo bed, which is connected to the hoist cylinder, rotates up and down around the hinge pin and performs a hoisting operation.

  On the loading platform of the dump truck, objects to be transported such as earth and sand and crushed stone are piled up by, for example, a hydraulic excavator. And the dump truck is set as the structure which can take down the conveyance target object loaded on the loading platform by making a loading platform shift from a lying state to an upright state (for example, refer patent document 1).

  The loading platform includes a bottom plate that forms a bottom portion, a front plate that is located on the front side of the bottom plate and forms a front surface, and a pair of side plates that are located on both sides of the bottom plate, and the inside is a loading portion. . A swash plate may be attached to each connecting corner portion of the bottom plate, the front plate, and the side plate forming the loading portion for the purpose of reinforcing the connecting portion. Moreover, the top plate part protruded ahead is connected to the upper part of the front plate of the loading platform so as to cover the cab and the control box.

  In addition, the bottom plate, front plate, side plate and top plate of the cargo bed are provided with body liners on the contact surface with the object to be transported in order to prevent the wear of the plate that occurs when the object to be transported slides down on each plate. (Wear plate) is installed. In many cases, several body liners are welded to the rear portion of the bottom plate having a particularly large wear amount (see, for example, Patent Document 2).

US Pat. No. 5,555,699 US Pat. No. 6,854,808

  However, in the above-mentioned conventional known technology, when the adhesion of the object to be transported is large, the object to be transported may not be completely dropped from the bed when unloading, and a part may remain on the wall of the bed. The object to be transported left on the loading platform may stick to the wall surface of the loading platform due to a decrease in moisture content with the passage of time. As the number of times of transportation increases, the amount of adhesion increases and the amount of adhesion increases. In particular, at the corners of the bottom plate and the front plate, and the front plate and the side plate, the object to be transported is pressed against the cargo bed wall with great pressure by gravity acceleration and inertial acceleration generated during transportation such as stopping and turning. Since the flow of the load when unloading is poor and tends to remain, there is a high possibility that the object to be transported will adhere.

  When the object to be transported adheres, the amount of transport for one time transported from the loading site to the unloading site is reduced, resulting in a reduction in work efficiency.

  In order to solve such a problem, an object of the present invention is to provide a cargo bed structure capable of increasing the work efficiency (transport efficiency) by reducing the amount of an object to be carried that adheres to the cargo bed wall surface.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems, and an example thereof has the following characteristics.

The bottom plate and the front plate disposed at the front portion of the bottom plate and the side plate disposed at the side portion of the bottom plate form a stacking portion that is open at the top and rear, and rotates around the rotation axis to thereby form the bottom plate. In a carrier loading platform that is configured to be able to change the inclination angle of the vehicle and is mounted on a vehicle, the body liner that slides on the inner wall surface of the loading unit, and the inner wall surface of the loading unit and the body liner are connected to each other. A flexible body, and the flexible body includes a first coupling portion to which the bottom plate and the front plate are coupled, a second coupling portion to which the front plate and the side plate are coupled, or the of the third connecting part bottom plate and said side plates are connected, while being arranged over the connecting portion of at least any one, disposed for Shin exhibition in accordance with the slide of the previous SL body liner, In addition, coupled with the body liner That the ends of the side connected to the connecting member for sliding on the inner wall surface, Ru is connected to the body liner via the connecting member.

  According to the present invention, the flexible body provided at a location (for example, a corner portion) where the object to be transported easily adheres by utilizing the force of sliding the body liner when unloading, so that the flexible body It is possible to suppress the adhesion of an object to be transported above, and to drop many objects to be transported when unloading. Thereby, the amount of conveyance for one time conveyed from the loading site to the unloading site can be increased, and work efficiency can be improved.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a side view of the dump truck concerning Example 1 of the present invention. It is a perspective view which shows the outline of the principal part in the state which stood the loading platform of the dump truck shown in FIG. It is a perspective view which shows the outline of the principal part of the loading platform of the dump truck shown in FIG. It is a behavior schematic diagram of the load adhesion suppression structure concerning Example 1, and is a figure showing the state where the loading platform laid down (sitting down). It is a behavior schematic diagram of the load adhesion suppression structure concerning Example 1, and is a figure showing the state where the loading platform stood up. It is a figure which shows the example of a change which changed a part (swash plate) of the loading platform shown to FIG. 4A. It is a figure which shows the AA cross section of FIG. 4A and 4B. It is a figure which shows the cross section of the fixing bracket vicinity which concerns on Example 1. FIG. It is a perspective view which shows the fixation bracket vicinity which concerns on Example 1 in a partial cross section. FIG. 6 is a perspective view illustrating a modification example of the support (fixing) structure of the flexible body according to the first embodiment. It is a perspective view which shows the example of a change of the flexible body fixing structure shown to FIG. 7B. It is a figure which shows the cross section of the slide-type body liner vicinity which concerns on Example 1. FIG. It is a figure which shows the BB cross section of FIG. 8A. It is a perspective view which shows the slide type body liner vicinity with a partial cross section. It is a figure which shows the example of a change which changed the structure of the slide type | mold body liner vicinity which concerns on Example 1 partially in the cross section similar to FIG. 8A. It is a figure which shows the example of arrangement | positioning of the load adhesion control structure which concerns on Example 1, and is a perspective view which shows the example which comprised the elastic body alone. It is a figure which shows the example of arrangement | positioning of the load adhesion suppression structure which concerns on Example 1, and is a perspective view which shows the example which comprised the elastic body in multiple numbers. It is a schematic diagram which shows the behavior of the load adhesion suppression structure which concerns on Example 2, and is a figure which shows the state which the loading platform laid down (seated). It is a schematic diagram which shows the behavior of the load adhering suppression structure which concerns on Example 2, and is a figure which shows the state which the loading platform stood up in order to unload. It is a perspective view which shows arrangement | positioning of the load attachment suppression structure which concerns on Example 2. FIG. It is a perspective view which shows arrangement | positioning of the load attachment suppression structure which concerns on Example 3. FIG. It is a block diagram which shows the load adhesion suppression structure which concerns on Example 4 in a cross section. It is a perspective view which shows arrangement | positioning of the load attachment suppression structure which concerns on Example 5. FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a carrier bed of a transport vehicle according to the present invention will be described with reference to the drawings. In the following embodiments, a dump truck will be described as a transport vehicle targeted for a transport vehicle loading platform. The carrier vehicle carrier (hereinafter referred to as a carrier) according to the present invention is also applicable to a carrier vehicle other than a dump truck. For example, it may be a transport vehicle that does not have an engine for self-running and is towed by another vehicle.

  The present embodiment relates to a load adhesion suppressing structure installed on a cargo bed in order to suppress the adhesion of the load to the cargo bed.

  With reference to FIG. 1 and FIG. 2, the structure of the transport vehicle of a present Example and its loading platform is demonstrated. FIG. 1 is a side view of a dump truck according to the present embodiment. FIG. 2 is a perspective view schematically showing a main part in a state where the loading platform of the dump truck shown in FIG. 1 is raised.

  As shown in FIG. 1, the dump truck 1 according to this embodiment includes a body frame 2, a pair of front wheels 3, a pair of rear wheels 4, and a loading platform 5. The pair of front wheels 3 are rotatably attached to the left and right ends of the front portion of the body frame 2. The pair of rear wheels 4 are rotatably attached to the left and right ends of the rear portion of the body frame 2. Further, the loading platform 5 is a portion on which a transport object (also referred to as a load) such as earth and sand, crushed stone, or ore is loaded, and is mounted on the vehicle body frame 2 so as to be raised and lowered.

  The vehicle body frame 2 is a so-called vehicle body, and as shown in FIG. 2b. The pair of frame members 2a. 2b has a frame shape elongated in the front-rear direction, and is arranged separately in the width direction of the vehicle body. In a state where the loading platform 5 is seated on the vehicle body frame 2, the pair of rails 13 (13a, 13b) of the loading platform 5 is exactly the pair of frame members 2a. It is configured to be placed on 2b.

  Further, a hinge pin 6 is attached to the rear part of the body frame 2 as a center of rotation when the cargo bed 5 is raised or tilted (the front portion of the cargo bed 5 is rotated in the vertical direction). A pair of hoist cylinders 7 as hydraulic cylinders for connecting the body frame 2 and the loading platform 5 are attached to the front side of the hinge pin 6 in the body frame 2. The pair of hoist cylinders 7 are attached to a substantially central portion in the front-rear direction of the body frame 2. Further, a cab 8 that is a driver's cab in which an operator gets in is provided above the left front wheel of the body frame 2, and a power unit 10 in which an engine is accommodated is provided in the front part of the body frame 2.

  Therefore, when the operator drives the hoist cylinder 7 from the cab 8, the loading platform 5 stands or falls. When the loading platform 5 stands up, the hoist cylinder 7 is in an extended state, and as the hoist cylinder 7 contracts, the front portion of the loading platform 5 rotates downward about a hinge pin (rotating shaft or rotating shaft) 6. Then, the loading platform 5 is in a lying posture (see FIG. 1) in which it is seated on the vehicle body frame 2. In addition, the loading platform 5 is in a standing posture in which the front portion of the loading platform 5 rotates upwardly around the hinge pin 6 as the hoist cylinder 7 extends from the state in which the loading platform 5 is laid down and seated on the vehicle body frame 2. (See FIG. 2).

  In addition, the code | symbol 9 of FIG. 1 is a guide contact | abutted with the side part of the vehicle body frame 2, in order to prevent the loading platform 5 moving to the left-right direction.

  Next, the structure of the loading platform 5 will be described with reference to FIG. FIG. 3 is a perspective view showing an outline of a main part of the loading platform 5 of the dump truck.

  The loading platform 5 has a substantially box-like shape in which the upper and rear sides are opened by a bottom plate (floor) 11a, a front plate (front) 11b, and two side plates (sides) 11c. Is formed. The bottom plate 11a, the front plate 11b, and the side plate 11c are joined by welding. The loading platform 5 is seated on the vehicle body frame 2 with its bottom plate 11a inclined slightly downward (see FIG. 1).

  The front plate 11b is disposed on the front side of the bottom plate 11a, and the side plate 11c is disposed on the side portion of the bottom plate 11a. The front plate 11b and the side plate 11c are disposed on the peripheral edge of the bottom plate 11a, and constitute a peripheral wall having an open portion toward at least one direction (backward in this embodiment). The bottom plate 11a, the front plate 11b, and the side plate 11c constitute an inner wall surface of the stacking unit 11. The bottom plate 11 a constitutes the bottom surface of the stacking unit 11. The front plate 11 b constitutes an inner peripheral wall surface on the front side of the stacking unit 11. The side plate 11c constitutes the inner peripheral wall surface of the side portion.

  A substantially plate-like top plate (canopy) 11d is attached to the upper portion of the front plate 11b. The top plate 11d is attached so as to protrude forward so as to cover the upper front portion of the dump truck 1 from the upper portion (upper edge) of the front plate 11b. That is, the top plate 11d is provided in order to prevent damage to the cab 8, the power unit 10 and the like due to the fall of the object to be transported from the loading platform 5 in a lying state where the loading platform 5 is seated on the body frame 2. .

  Furthermore, a swash plate 12 (12a, 12b, 12c) is welded to a corner portion, which is a joint portion of the bottom plate 11a, the front plate 11b, and the side plate 11c, for reinforcement. The swash plate 12 includes a swash plate 12a (floor and front) at the corner portion of the bottom plate 11a and the front plate 11b, and a pair of swash plates 12b located on both sides of the bottom plate 11a and at the corner portions of the bottom plate 11a and the side plate 11c. (Floor and side) and a pair of swash plates 12c (front and side) located on both sides of the front plate 11b and located at the corners of the front plate 11b and the side plate 11c.

  In the present invention, the bottom plate 11a and the front plate 11b or the bottom plate 11a and the side plate 11c do not need to be joined at the corner portion (corner portion of the stacking portion 11). For example, a member constituting the bottom plate 11a may constitute a part of the front plate 11b or the side plate 11c, or a member constituting the front plate 11b or the side plate 11c may constitute a part of the bottom plate 11a. . In the present specification, a portion formed on the bottom surface side of the stacking portion 11 with respect to the corner portion is referred to as a bottom plate 11a, and is configured on the front inner wall surface side of the stacking portion 11 with respect to the corner portion. The portion that is configured on the side inner wall surface side of the stacking portion 11 with respect to the corner portion is referred to as the side plate 11c. Accordingly, the connecting portion between the bottom plate 11a and the front plate 11b, or the connecting portion between the bottom plate 11a and the side plate 11c does not necessarily coincide with the joint portion by welding or the like, but coincides with the corner portion.

  Next, with reference to FIG. 4A, FIG. 4B, and FIG. 5, the details of the “load attachment prevention structure” of the present embodiment will be described. FIG. 4A is a schematic diagram of the behavior of the load adhering suppression structure according to the present embodiment, and is a diagram showing a state in which the loading platform has fallen (seated). FIG. 4B is a schematic diagram of the behavior of the load adhering suppression structure according to the present embodiment, and is a diagram illustrating a state where the loading platform is raised. FIG. 5 is a diagram showing a cross section taken along the line AA of FIG. 4A. 4A and 4B are cross sections in a direction (vertical direction) parallel to the front-rear direction of the loading platform 5 and perpendicular to the bottom plate 11a.

  In this embodiment, as shown in FIG. 4A, the fixing bracket 30 fixed to the front plate (front) 11b and the end portion of the slide type body liner 20 that slides on the bottom plate (floor) 11a are made of a flexible body. Connect at 40. As shown in FIG. 4B, the sliding-type body liner 20 has a rearward movement range limited by a rear side stopper 21 installed at the rear end of the loading platform 5. Further, as shown in FIG. 5, the sliding body liner 20 is installed between a pair of end side stoppers 22 installed at both ends in the width direction of the loading platform 5 and a pair of end side stoppers 22. The T-type side stopper 23 and the guide rail 24 thus made restrict movement of the loading platform 5 in the width direction. That is, the sliding body liner 20 is guided by the end side stopper 22, the T-type side stopper 23 and the guide rail 24 to move the loading platform 5 in the front-rear direction, and the loading platform 5 moves in the width direction. It is regulated.

  When unloading the vehicle, the body liner 20 slides on the bottom plate 11a when the rear end of the loading platform 5 is inclined so as to be lower than the front end. This slide induces the load to slide out.

  When the body liner 20 slides backward on the bottom plate 11a, the end of the flexible body 40 connected to the body liner 20 is pulled backward, and the flexible body 40 extends or expands as shown in FIG. 4B.

  The flexible body 40 is a sheet-like or mesh-like member, and can be bent by being deformed in the out-of-plane direction of the sheet surface. Furthermore, it is good also as a member which can be deform | transformed and expanded and contracted in the surface direction of a sheet | seat surface, and the flexible body 40 can be comprised with an elastic body in this case. In the following description, the flexible body 40 is constituted by an elastic body and will be described as the elastic body 40.

  In order to prevent a load from being mixed between the adjacent slide type body liners 20, a seat 25 may be installed as shown in FIG.

  Here, with reference to FIG. 4C, the example of a change of a present Example is demonstrated. FIG. 4C is a diagram illustrating a modified example in which a part of the loading platform (swash plate 12) illustrated in FIG. 4A is modified.

  4A and 4B, the swash plate 12a is formed of a flat plate, but may be formed of a curved member having a curved surface as shown in FIG. 4C. In this case, the curved surface of the curved member is a curved surface that is convex toward the joint between the bottom plate 11a and the front plate 11b, and is a curved surface that is concave when viewed from the front side. By constituting the swash plate 12a with a curved member as shown in FIG. 4C, it is possible to prevent or suppress the sticking to the swash plate 12a when a highly sticky load such as oil sand is loaded. become. The swash plates 12b and 12c may also be formed of a curved member in the same manner as the swash plate 12a.

  Next, a support (fixed) structure of the elastic body 40 will be described with reference to FIGS. 6 and 7A. FIG. 6 is a view showing a cross section near the fixed bracket according to the present embodiment. FIG. 7A is a perspective view of the vicinity of the fixed bracket according to the present embodiment in a partial cross section. Note that the support (fixed) structure of the present embodiment is also applicable to each embodiment described later.

  The fixing bracket 30, the elastic body 40, and the front plate (front) 11b are each provided with a plurality of drill holes 30a, 40a, 11b-1 on the same line, and the elastic body 40 is fixed to the front plate (front) 11b. In a state of being sandwiched by the bracket 30, it is fixed by a plurality of bolts 31 and nuts 32 that pass through these drill holes.

  The fixed bracket 30 is provided with a groove 30 b for inserting the elastic body 40 and a taper 30 c for suppressing adhesion of a load to the fixed bracket 30. For fixing the fixing bracket 30 and the front plate (front) 11b, not only bolt fixing but also fixing by welding or adhesion may be used to directly fix both. Further, a screw hole may be provided in the front plate (front) 11b instead of the drill hole 11b-1, and the bolt 31 may be directly screwed and fixed to the front plate 11b without using the nut 32 (not shown). Further, a bush (slide bearing) or a sleeve 40d may be installed in the drill hole 40a provided in the elastic body 40 for reinforcement.

  Here, with reference to FIG. 7B and FIG. 7C, the example of a change of the support (fixation) structure of a flexible body (elastic body 40) is demonstrated. FIG. 7B is a perspective view showing a modified example of the support (fixing) structure of the flexible body.

  In this modified example, a pressing member (abutting member) 90 is applied to the surface (front surface) opposite to the surface (back surface) that contacts the front plate 11b of the elastic body 40, and the elastic body 40 is sandwiched between the front plate 11b and the pressing member 90. In this manner, one end of the elastic body 40 is supported on the front plate 11b. The holding member 90 is an elongated plate-like or bar-like member extending in the width direction of the loading platform 5, and a plurality of drill holes 91 are provided along the width direction of the loading platform 5. The bolts 31 are inserted into the plurality of drill holes 91 and the bolts 31 are tightened to sandwich the elastic body 40 between the front plate 11 b and the pressing member 90. At this time, the pressing member 90 presses the elastic body 40 against the front plate 11 b with a large surface extending in the width direction of the loading platform 5. For this reason, in the fixing part to the front plate 11b of the elastic body 40, strength reduction due to fatigue can be suppressed.

  FIG. 7C is a perspective view showing a modified example of the support (fixed) structure of the flexible body shown in FIG. 7B. In this modified example, the fixing portion of the elastic body 40 shown in FIG. 7B to the front plate 11b is covered with the fixing bracket 30 shown in FIGS. 6 and 7A. In this case, the fixing bracket 30 does not participate in fixing the elastic body 40 to the front plate 11 b and functions as a simple cover member 30. The cover member 30 covers the upper side and the side of the fixing portion of the elastic body 40 in a state where the loading platform 5 is seated, and prevents the load from adhering to the fixing portion.

  Next, the structure of the connecting portion between the elastic body 40 and the sliding body liner 20 will be described with reference to FIGS. 8A, 8B, 9, and 10. FIG. FIG. 8A is a cross-sectional view of the vicinity of the sliding body liner 20. 8B is a cross-sectional view taken along the line BB in FIG. 8A. FIG. 9 is a perspective view showing the vicinity of the sliding body liner 20 in a partial cross section. FIG. 10 is a view showing a modified example in which the configuration in the vicinity of the sliding body liner 20 is partially changed, in the same cross section as FIG. 8A. In addition, the structure of the connection part of the elastic body 40 and the slide type body liner 20 demonstrated here is applicable to each Example mentioned later.

  The elastic body 40 is provided with a plurality of drill holes 40b in front of the rear end 40R, and is fixed by a liner side slide 50 and a screw 51 arranged between the bottom plate 11a. Further, a taper 40c for suppressing the adhesion of the load to the elastic body 40 is provided from the rear end 40R toward the front.

  As shown in FIG. 8B, the liner side slide portion 50 has slide grooves 50a formed at both ends in the width direction of the loading platform 5, and a liner side slide portion end side stopper 60 installed on the bottom plate (floor) 11a. Is inserted between. The liner side slide part 50 is also slid by the liner side slide part end side stopper 60 in the direction in which the slide type body liner 20 slides.

  The slide type body liner 20 is disposed between the elastic body 40 and the bottom plate 11a on the rear side of the liner side slide part 50, and the hook screw 52 provided on the liner side slide part 50 and the slide type body liner 20 are provided. Are connected to the liner-side slide portion 50 by eyebolts 53 provided on the inner side. As shown in FIG. 9, a plurality of hook screws 52 and eyebolts 53 are provided in the width direction of the loading platform 5, and connect the slide type body liner 20 and the liner side slide portion 50 at a plurality of locations.

  The hook screw 52 may be provided on the slide type body liner 20, and the eyebolt 53 may be provided on the liner side slide portion 50. In addition to the hook screw 52 and the eyebolt 53, a connecting member capable of connecting the slide type body liner 20 and the liner side slide portion 50 may be provided. Note that the connecting member that connects the sliding body liner 20 and the liner-side slide portion 50 is preferably a member that can be released from the connection.

  In order to prevent damage in the vicinity of the drill hole 40b due to contact between the elastic body 40 and the screw 51, as shown in FIG. 10, a sleeve 40f is provided in the through hole 40b1 constituting the drill hole 40b, and a through hole is formed in the center of the recess 40b2. It is preferable to provide a plate 40e on which is formed.

  Next, with reference to FIG. 11 and FIG. 12, the example which installed the load adhesion suppression mechanism in the loading platform 5 is demonstrated. FIG. 11 is a diagram illustrating an arrangement example of the load adhering suppression structure according to the present embodiment, and is a perspective view illustrating an example in which an elastic body is configured as a single body. FIG. 12 is a diagram illustrating an arrangement example of the load adhering suppression structure according to the present embodiment, and is a perspective view illustrating an example in which a plurality of elastic bodies are configured.

  The fixed bracket 30 installed on the front plate (front) 11b and the sliding body liner 20 installed on the bottom plate (floor) 11a are connected by an elastic body 40. The number of the elastic body 40, the fixed bracket 30, and the sliding body liner 20 to be connected may be one or plural. In FIG. 11, it is composed of one elastic body 40 and two sliding body liners 20. The two sliding body liners 20 are arranged side by side in the width direction of the loading platform 5. In FIG. 12, the slide type body liner 20 is composed of two, and a plurality of elastic bodies 40 are arranged in the width direction of the loading platform 5.

  Instead of the support structure of the elastic body 40 by the fixing bracket 30, a fixing structure of the elastic body 40 according to the modification shown in FIG. 7B or FIG. 7C may be used.

  11 and 12, the adhesion suppressing structure is applied to the entire surface of the swash plate 12a (floor and front) at the corners of the bottom plate 11a and the front plate 11b, but the sliding body liner 20 slides. May be partially (not shown).

  At the time of unloading, when the loading platform 5 reaches a predetermined loading platform inclination angle, the sliding body liner 20 slides from the front of the loading platform 5 to the rear.

  The body liner 20 induces sliding of the load by sliding on the bottom plate 11a of the loading platform 5 when the loading platform inclination angle is small. Thereby, it is possible to prevent a large amount of loads from falling at once.

  As the slide type body liner 20 slides, the fixing bracket 30 installed on the front plate (front) 11b and the elastic body 40 connected to the slide type body liner 20 extend or extend to the rear side. Thereby, the elastic body 40 on the swash plate 12a (floor and front) at the corner portion of the bottom plate 11a and the front plate 11b to which the load is easily attached moves upward, and as a result, the load is pushed upward. Adhesion of the load to the loading platform 5 can be suppressed.

  As described above, it is possible to increase the transport amount for one time transported from the loading site to the unloading site, and it is possible to improve work efficiency.

  In the present embodiment, an example of a load adhering suppression structure of the swash plate 12c (front and side) at the corners of the front plate 11b and the side plate 11c will be described.

  FIG. 13A is a schematic diagram illustrating the behavior of the load adhering suppression structure according to the present embodiment, and is a diagram illustrating a state in which the loading platform has fallen (seated). FIG. 13B is a schematic diagram illustrating the behavior of the load adhering suppression structure according to the present embodiment, and is a diagram illustrating a state in which the loading platform is erected to release the soil. FIG. 14 is a perspective view showing the arrangement of the load adhering suppression structure according to the present embodiment.

  The fixed bracket 30 is fixed to the front plate 11b and the sliding body liner 20 is installed on the side plate 11c so that the longitudinal direction of the fixed bracket 30 is along the vertical direction of the front plate 11b. The sliding direction of the sliding body liner 20 is the front-rear direction, and slides from the front side to the rear side when unloading. The fixed bracket 30 and the slide type body liner 20 are connected by an elastic body 40. The elastic body 40 may be a flexible body as described in the first embodiment.

  As a structure for supporting (fixing) the elastic body 40 to the inner peripheral wall surface of the stacking portion 11, the structure of the first embodiment described with reference to FIGS. 6, 7A, 7B, and 7C can be employed. Further, as the structure of the connecting portion between the elastic body 40 and the slide type body liner 20, the structure of the first embodiment described with reference to FIGS. 8A, 8B, 9, and 10 can be employed.

  At the time of unloading, when the loading platform 5 reaches a predetermined loading platform inclination angle, the sliding body liner 20 slides from the front of the loading platform 5 to the rear. In accordance with the sliding of the sliding body liner 20, the fixing bracket 30 installed on the front plate (front) 11b and the elastic body 40 connected to the sliding body liner 20 extend or extend to the rear side. Thereby, the elastic body 40 on the swash plate 12c (front and side) at the corner portion between the front plate 11b and the side plate 11c to which the load is easily attached moves inward of the load portion 11, and as a result, the swash plate 12c. The movement of the load on the upper side is promoted, and the adhesion of the load to the loading platform 5 is suppressed.

  With reference to FIG. 15, an example in which a load adhering suppression structure is provided at a corner portion that is a connecting portion of the bottom plate 11a, the front plate 11b, and the side plate 11c will be described. FIG. 15 is a perspective view illustrating an example in which the load adhering suppression structure according to the present embodiment is installed on the loading platform 5.

  The fixing bracket 30 is fixed across the front plate 11b, the swash plate 12c (front and side) at the corner of the front plate 11b and the side plate 11c, and the side plate 11c, and the sliding body liner 20 is fixed to the bottom plate 11a. It is installed on the swash plate 12b (floor and side) at the corners of the bottom plate 11a and the side plate 11c and the side plate 11c. The sliding direction of the sliding body liner 20 is the front-rear direction, and all the sliding body liners 20 slide from the front side to the rear side when unloading. The fixed bracket 30 and the slide type body liner 20 are connected by at least one elastic body 40. The elastic body 40 may be a flexible body as described in the first embodiment.

  As a structure for supporting (fixing) the elastic body 40 to the inner peripheral wall surface of the stacking portion 11, the structure of the first embodiment described with reference to FIGS. 6, 7A, 7B, and 7C can be employed. Further, as the structure of the connecting portion between the elastic body 40 and the slide type body liner 20, the structure of the first embodiment described with reference to FIGS. 8A, 8B, 9, and 10 can be employed.

  At the time of unloading, when the loading platform 5 reaches a predetermined loading platform inclination angle, the sliding body liner 20 slides from the front of the loading platform 5 to the rear. In accordance with the sliding of the sliding body liner 20, the elastic body 40 connected to the fixed bracket 30 and the sliding body liner 20 extends or extends rearward. As a result, the elastic body 40 on the corner portion, which is a joining portion of the bottom plate 11a, the front plate 11b, and the side plate 11c, to which the load is easily attached, moves toward the rear side or the inside of the loading portion 11, and as a result, above the corner portion. The load of the load is promoted to prevent the load from adhering to the loading platform 5.

  With reference to FIG. 16, the example of the reinforcement structure of the elastic body 40 used with a load adhesion suppression structure is demonstrated. FIG. 16 is a schematic cross-sectional view of the load adhesion suppressing structure according to the present embodiment.

  At the connecting portion of the elastic body 40 on the fixed bracket 30 side, a fixed bracket-side connector 70 that is fixed with a screw 71 is newly provided at the tip of the elastic body 40. The fixed bracket side connector 70 and the fixed bracket 30 are connected by a hook screw 72 attached to the fixed bracket side connector 70 and an eye bolt 73 attached to the fixed bracket 30. In addition, an eyebolt 74 is installed on the fixed bracket side connector 70 on the surface opposite to the hook screw 72 attached.

  The connecting portion of the elastic body 40 on the sliding body liner 20 side uses the structure of the first to third embodiments, and an eyebolt 54 is newly provided on the side opposite to the sliding body liner 20 side of the liner side sliding portion 50. .

  The eyebolt 74 attached to the fixed bracket side connector 70 and the eyebolt 54 attached to the liner side slide portion 50 are connected by an elastic body expansion / contraction amount suppressing rope 80. At this time, the length of the elastic body expansion / contraction amount suppressing rope 80 is longer than that of the elastic body 40, and the elastic spring coefficient of the elastic body expansion / contraction amount suppressing rope 80 is larger than that of the elastic body 40.

  The elastic body expansion / contraction amount suppressing rope 80 is formed of at least a flexible member. On the other hand, the elastic body 40 needs to have not only flexibility but also stretchability. In this embodiment, the fixed bracket side connector 70 and the liner side slide portion 50 are connected by a first connecting member (first flexible body) and a second connecting member (second flexible body). . The first connecting member is a sheet-like or mesh-like member, and has flexibility and stretchability. The second connecting member is a string-like member and has at least flexibility. The second connecting member may have elasticity, but as described above, the expansion spring coefficient of the second connection member needs to be larger than the expansion spring coefficient of the first connection member. In this embodiment, the first connecting member is composed of an elastic body 40, and the elastic body expansion / contraction amount suppressing rope 80, which is the second connecting member, is composed of an elastic body having flexibility and stretchability.

  As a structure for supporting (fixing) the elastic body 40 to the inner peripheral wall surface of the stacking portion 11, the structure of the first embodiment described with reference to FIG. 7B can be employed. That is, the pressing member 90 is disposed on the surface of the elastic body 40 opposite to the side that contacts the fixed bracket side connector 70.

  Further, the fixed bracket side connector 70 has a configuration in which the hook screw 72 is connected to the eye bolt 73 and supported by the fixed bracket 30, but the fixed bracket side connector 70 may be directly fixed to the front plate 11b. Further, the elastic body expansion / contraction amount restraining rope 80 may be directly connected to the front plate 11b. In this case, the fixing bracket side connector 70 is not provided and the support (fixing) structure of the elastic body 40 described in the first embodiment is adopted. May be.

  At the time of unloading, when the loading platform 5 reaches a predetermined loading platform inclination angle, the sliding body liner 20 slides from the front of the loading platform 5 to the rear. In response to the sliding of the sliding body liner 20, first, the elastic body 40 connected to the fixing bracket 30 and the sliding body liner 20 extends to the rear side. When the elastic body 40 is extended to a predetermined length, tension is also generated in the elastic body expansion / contraction amount suppressing rope 80, and the elastic body 40 and the elastic body expansion / contraction amount suppressing rope 80 are applied with the force by which the sliding body liner 20 slides backward. Will be in charge. Since the elastic spring coefficient of the elastic body expansion / contraction amount restraining rope 80 is larger than that of the elastic body 40, the force that the elastic body expansion / contraction amount suppressing rope 80 takes up as it expands, compared with the case where there is no elastic body expansion / contraction amount suppressing rope 80. The tension applied to the elastic body 40 is reduced. As a result, the elastic body 40 is reinforced and the life of the elastic body 40 can be extended.

  In the present embodiment, it is only necessary that the second connecting member constituted by the elastic body expansion / contraction amount restraining rope 80 is configured to receive the force applied to the elastic body 40 as the first connecting member. For this reason, the 2nd connection member does not need to have a stretching property. However, since both the first connecting member and the second connecting member have elasticity, the sliding of the sliding body liner 20 can be smoothly stopped, and a large impact force is generated by the first connecting member. It can prevent acting on the 2nd connecting member and these fixed parts or connecting parts.

  In addition, by embedding a load sensor or damage sensor in the elastic body expansion / contraction amount suppression rope 80, detection when an excessive force is generated in the elastic body expansion / contraction amount suppression rope 80 and notification of a part replacement time according to the damage amount are provided. It becomes possible.

  With reference to FIG. 17, an example of a new connection structure in the case where a space is left between the elastic body 40 and the slide type body liner 20 used in the load adhesion prevention structure will be described. FIG. 17 is a perspective view illustrating an example in which the load adhering suppression structure according to the present embodiment is installed on the loading platform 5.

  In this structure, the sliding body liner 20 is installed at the rear portion of the bottom plate 11a, and the fixed body liner 26 is installed at the middle portion of the bottom plate 11a. The elastic body 40 and the slide type body liner 20 are connected by a connection rope 81. The connection rope 81 passes through a gap between the fixed body liners 26 fixed on the bottom plate 11a. The elastic body 40 and the slide type body liner 20 may be connected on a one-to-one basis, or may be connected on a one-to-one basis.

  In this structure, since the falling slip energy of the large load at the rear portion of the bottom plate 11a can be used, the extension amount of the elastic body 40 is also increased, and the adhesion of the load at the corner portion can be expected.

  As a structure for supporting (fixing) the elastic body 40 to the inner peripheral wall surface of the stacking portion 11, the structures of the above-described embodiments can be employed. Moreover, the structure of each Example mentioned above is employable as a structure of the connection part of the elastic body 40 and the slide type body liner 20. FIG. And the liner side slide part 50 and the slide type body liner 20 should just be connected with the connection rope 81. FIG. However, in this case, the liner side slide portion 50 is slid on the fixed body liner 26.

  In addition, this invention is not limited to each above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Dump truck, 2 ... Body frame, 2a ... Frame material, 3 ... Front wheel, 4 ... Rear wheel, 5 ... Cargo bed, 6 ... Hinge pin, 7 ... Hoist cylinder, 8 ... Cab, 9 ... Guide, 10 ... Power unit, 11 Loading platform 11a ... Bottom plate (floor) of loading platform 11b ... Front plate (front) of loading platform, 11b-1 ... Drill hole (front plate (front) of loading platform), 11c ... Side plate (side) of loading platform, 11d ... Loading plate top plate (canopy), 12 ... Loading plate swash plate, 12a ... Loading plate swash plate (floor and front), 12b ... Loading plate swash plate (floor and side), 12c ... Loading plate swash plate (front and front) Side), 13 ... Rail, 14 ... Hinge pin bracket, 15 ... Rubber pad (pad), 20 ... Sliding body liner, 20a ... Side groove (sliding body liner), 20b ... Guide rail groove (Sliding body liner), 21 ... Rear side stopper, 22 ... End side side stopper, 23 ... T-type side side stopper, 24 ... Guide rail, 25 ... Seat, 26 ... Fixed body liner, 30 ... Fixing bracket, 30a ... Drill hole (fixed bracket), 30b ... Groove (fixed bracket), 30c ... Taper (fixed bracket), 31 ... Bolt, 32 ... Nut, 40 ... Elastic body, 40a ... Drill hole 1 (elastic body), 40b ... Drill hole 2 (elastic body), 40b1 ... through hole, 40b2 ... concave, 40c ... taper (elastic body), 40d ... sleeve, 50 ... liner side slide part, 50a ... slide groove (liner side slide part), 51 ... screw (Liner side slide part), 52 ... Hook screw (Liner side slide part), 53 ... Eye bolt (Slide type body liner) ), 54... Eyebolt (liner side slide part), 60... Liner side slide part guide, 60 a... Slide groove (guide), 70... Fixed bracket side connector, 71 ... screw (fixed bracket side connector), 72. (Fixed bracket side connector), 73... Eyebolt (fixed bracket), 74... Eyebolt (fixed bracket side connector), 80... Elastic body expansion amount restraining rope, 81 .. connection rope, 90.

Claims (5)

The bottom plate and the front plate disposed at the front portion of the bottom plate and the side plate disposed at the side portion of the bottom plate form a stacking portion that is open at the top and rear, and rotates around the rotation axis to thereby form the bottom plate. In the carrier platform for the transport vehicle that is configured to be able to change the inclination angle of the vehicle and is mounted on the transport vehicle,
A body liner that slides on the inner wall surface of the stacking unit; and a flexible body that connects the inner wall surface of the stacking unit and the body liner;
The flexible body is
A first connecting part for connecting the bottom plate and the front plate, a second connecting part for connecting the front plate and the side plate, or a third connecting part for connecting the bottom plate and the side plate. And disposed across at least one of the connecting portions, and disposed so as to extend according to the slide of the body liner,
Furthermore, an end part on the side connected to the body liner is connected to a connecting body that slides on the inner wall surface, and is connected to the body liner via the connecting body. The carrier for a carrier vehicle according to claim 1 ,
The flexible body is composed of a first flexible body and a second flexible body,
The first flexible body is composed of an elastic body having elasticity,
The transport platform for a transport vehicle, wherein the second flexible body has a length connecting the inner wall surface of the stacking portion and the connecting body longer than a length of the first flexible body. The carrier for a carrier vehicle according to claim 2 ,
The carrier bed according to claim 1, wherein the second flexible body is made of an elastic body having elasticity and has a larger elastic spring coefficient than the elastic spring coefficient of the first flexible body. In the carrier for carrier vehicles according to claim 3 ,
Each of the first flexible body and the second flexible body is supported at the one end by the front plate, and the other end is connected to a body liner that slides on the bottom plate. A carrier vehicular loading platform, which is disposed across a first connecting portion to which the front plate is connected. A vehicle body frame, front wheels provided on the left and right of the front portion of the vehicle body frame, front wheels provided on the left and right of the rear portion of the vehicle body frame, a driver's cab mounted on the vehicle body frame, a carrier platform and a hoist cylinder, In a dump truck that can be changed to a standing posture or a lying posture by rotating around a rotating shaft provided at the rear part of the carrier using the hoist cylinder,
The dump truck according to claim 1, wherein the transport vehicle carrier is composed of the transport vehicle carrier.

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