JP6599800B2 - Lorry - Google Patents

Description

  The present invention relates to a cargo vehicle on which a load box that can slide and ground on a vehicle frame is mounted.

  A truck that can slide with respect to a vehicle frame whose longitudinal direction is the longitudinal direction of the vehicle can carry a truck, a construction machine, an agricultural machine, or the like on the cargo box. For example, as shown in FIG. 5A, a lorry vehicle 900 that transports a construction machine or the like uses a slide cylinder (not shown) to slide the cargo box 901 to the vehicle rear side, and the slide causes the cargo box 901 to tilt. Can be grounded. Moreover, this cargo vehicle 900 can also dump a packing box using the lift cylinder 902 like FIG.5 (b) (patent document 1).

JP 2006-036113 A

  In the case of a lorry 900 capable of grounding the cargo box 901, the cargo box 901 is pulled up by using the contraction force of the extended slide cylinder. At this time, a large load is generated in each part contributing to the pulling operation during the pulling.

  For example, the packing box 901 is slid by the above-described slide cylinder as a slide roller (not shown) at the bottom of the packing box 901 rolls in the guide frame 904 on the vehicle frame 903. The position of the center of gravity of the cargo box 901 moves to the rear of the vehicle by the slide, and gradually inclines with the movement, and is grounded as shown in FIG. When the cargo box 901 is in a grounded state, the slide roller rolls to a portion 904a of the guide frame 904 closer to the rear of the vehicle.

  When the grounded shipping box 901 is lifted, the lifting force is transmitted to the guide frame 904 via the slide roller. In particular, a large load is applied to a portion 904a near the vehicle rear where the slide roller is located. Specifically, the lifting force is applied to push up from the bottom. Therefore, the portion 904a closer to the rear of the vehicle is greatly affected by the lifting force of the cargo box 901 because it has a guide function of the slide roller, and there is a risk that secular change may occur compared to the portion closer to the front of the vehicle.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and in a freight vehicle in which a cargo box that can slide and ground on a vehicle frame is mounted, secular change that can occur in a guide frame that is received when the cargo box is lifted can be suppressed. Provide trucks.

  A pair of left and right vehicle frames whose longitudinal direction is the longitudinal direction of the vehicle, and a tilting frame which is provided via a first tilt axis so as to be tiltable with respect to the vehicle frame and has the longitudinal direction of the vehicle as the longitudinal direction; A packing box mounted via a second tilting shaft so as to be slidable with respect to the tilting frame, a slide cylinder provided between the tilting frame and the packing box, and a lower portion of the packing box It is intended for a lorry equipped with a movable member that is fixed to the movable frame and is guided by the tilting frame. Construction boxes and other vehicles can be mounted on the packing box, and the “packing box” used here includes those without left and right side walls.

  In the lorry, the guide frame that guides the moving member of the tilt frame has a substantially U-shaped cross section, and a portion of the guide frame near the second tilt axis is a vehicle upper portion or a vehicle. A great feature is that a reinforcing portion for at least one of the side portions is provided.

  In addition, the cargo box of the lorry is mounted so as to be movable toward the vehicle rear side by extension of the slide cylinder, and the moving member is provided so as to be movable to a portion near the second tilting axis. It can also be configured.

  Further, the packing box is mounted so that when the moving member moves to a portion near the second tilting axis, it is inclined and is in a grounded state where its rear end is grounded, and the reinforcing portion is It can also be set as the structure which is the reinforcement plate or reinforcement bracket fixed to the outward side with respect to at least one of the said upper surface part or side part of the said guide frame.

  Apart from the means (configuration) described above, the truck according to the present invention may have the following configuration. Similarly, the main configuration of the target truck is similarly provided via a pair of left and right vehicle frames whose longitudinal direction is the longitudinal direction of the vehicle and a first tilting shaft so as to be tiltable with respect to the vehicle frame. A tilt frame whose longitudinal direction is the vehicle front-rear direction, a cargo box mounted via a second tilt shaft so as to be slidable with respect to the tilt frame, and the tilt frame and the cargo box A slide cylinder provided therebetween, and a movable member fixed to a lower portion of the packing box and movable while being guided by the tilting frame.

  In such a lorry, the cargo box has a cargo box frame whose longitudinal direction is the longitudinal direction of the vehicle, and a floor surface portion supported by the cargo box frame, and the cargo box frame is on the front side of the floor surface portion. The tilting frame has a front support portion for supporting an end portion, and the front end portion of the tilting frame is substantially in the same position in the vehicle front-rear direction with respect to the front support portion of the cargo box frame when the vehicle can run. It is a big feature that it is provided in.

  The tilting frame is connected to the vehicle frame and has a pair of left and right connection frames whose longitudinal direction is the vehicle front-rear direction, and is fixed to the connection frame and has the vehicle front-rear direction as the longitudinal direction. The guide frame is configured so that the front end portion thereof is positioned at the front end portion of the cargo box frame in the vehicle front-rear direction when the vehicle is ready to travel. You can also.

  The lorry according to the present invention has a reinforcing part in the part because the effect of the lifting operation of the box is generated in a part near the second tilt axis on the rear side of the vehicle in the tilt frame. It is possible to suppress a state in which the secular change precedes a portion of the guide frame near the second tilt axis in the tilt frame. This tilting frame is fixed to the vehicle frame that absorbs the entire load generated in the lorry. By providing a reinforcing portion at an appropriate position with respect to the tilting frame, the strength of the entire lorry is maintained. There is a big effect.

  In addition, since the tilting frame is provided so that the front end of the tilting frame is located at substantially the same position as the front end of the packing box frame that supports the floor surface of the packing box, there is also a moving member that is movable by being guided by the tilting frame. It can be provided near the front end of the packing box. For this reason, when the packing box is in a grounded state, the same grounding attitude as before, specifically, the same angle of inclination of the packing box as before, or the grounding of the packing box at the same position toward the rear of the vehicle in the tilting frame is completed. In this case, the moving member can be positioned on the front side of the tilt frame with respect to the tilt frame in the front-rear direction of the vehicle. In other words, by adopting a configuration in which the moving member is moved to the front side of the vehicle as compared with the conventional case, it is possible to distribute and suppress the load applied to the tilting frame at the time of lifting.

1 is a side view showing a truck according to the present invention. (A) is a perspective view which shows the tilting frame used for the lorry which concerns on this invention, (b) is a principal part perspective view which shows the front side of a tilting frame. It is a principal part bottom view which shows the roller provided in the floor surface of the packing box which concerns on this invention. (A) is a top view which shows the tilting frame used for the truck according to the present invention, (b) is a side view of the tilting frame, and (c) is a partially enlarged view of (a). It is a side view of the lorry concerning the conventional composition.

  An example of an embodiment of a truck according to the present invention will be described with reference to the drawings.

  FIG. 1 is a side view of a truck 100 according to the present embodiment. The lorry 100 includes a cargo box 2 mounted on a vehicle frame 1 whose longitudinal direction is the longitudinal direction of the vehicle. FIG. 1 (a) shows a state where the lorry 100 can travel, and FIG. 1 (b) shows a state where the cargo box 2 is tilted and grounded after sliding the cargo box 2 to the vehicle rear side (right side in the figure). ing. In this grounded state, the construction machine (not shown) can enter the cargo box 2. In addition to the state where the cargo box 2 is grounded, the lorry 100 tilts the cargo box 2 backward from the state of FIG. 1A using a lift cylinder (not shown) as shown in FIG. It can also be in a (dumped) state (for example, JP 2011-230653 A).

  Between the vehicle frame 1 and the cargo box 2, a tilting frame 3 that can tilt with respect to the vehicle frame 1 is provided. The tilt frame 3 is provided so as to be tiltable via a dump hinge 1 a serving as a first tilt axis with respect to the rear portion of the vehicle frame 1 with the longitudinal direction of the vehicle as in the vehicle frame 1. When the lorry 1 loaded with earth and sand on the cargo box 2 discharges the earth and sand to the rear of the vehicle, the dump hinge 1a is utilized by using the extension of a lift cylinder (not shown) connected to the vehicle frame 1. The cargo box 2 is tilted to the vehicle rear side with respect to the center. As the cargo box 2 tilts, the tailgate 2a opens downward (counterclockwise in the figure) around the upper hinge 21a, and earth and sand are discharged. At this time, the tilting frame 3 tilts in the same manner as the packing box 2.

  In addition, when the cargo vehicle 100 places the cargo box 2 in a grounded state as shown in FIG. 1B, the tilting frame 3 is secured to the vehicle frame 1 via the hook 3a. At this time, the packing box 2 is grounded as shown in the figure as the slide cylinder 4 provided between the tilting frame 3 and the packing box 2 extends.

  Here, the tilting frame 3 is as shown in FIG. 2, and the slide cylinder 4 is fixed to the rear portion of the tilting frame 3. In FIG. 2, for convenience of explanation, the slide cylinder 4 can be installed, and the part necessary for bringing the cargo box 2 into a grounded state is mainly shown. The tilting frame 3 according to the present embodiment is provided with reinforcing portions 6 and 7 (described later) that suppress the influence of the load on the tilting frame 3 when the grounded packing box 2 is pulled up. Is omitted.

As shown in FIG. 2, the tilting frame 3 has a pair of base frames 31 in the left-right direction (X-axis direction) whose longitudinal direction is the vehicle front-rear direction, and a vehicle front side (Y-axis positive direction side) between the left and right base frames 31. ) And cross frames 321 and 322 installed on the vehicle rear side (Y-axis negative direction side), and a guide frame 33 fixed to the cross frames 321 and 322 and having a longitudinal direction in the vehicle front-rear direction. The cross frame 322 on the rear side of the vehicle extends outward in the left-right direction of the vehicle (X-axis direction) from the base frame 31, and the extended tip is connected to the vehicle frame 1 via the dump hinge 1a. Yes.
Each base frame 31 is loaded on the vehicle frame 11.

  The guide frame 33 is connected to a cross frame 321 on the front side of the vehicle and has a horizontally extending shape, and an inclined frame portion 332 having a shape extending obliquely upward from the front frame portion 33 toward the rear. And a rear frame portion 333 having a shape extending horizontally from the inclined frame portion 332 toward the rear. Note that the left and right guide frames 33 have substantially U-shaped cross sections that are open on the inner sides facing each other, and the inner spaces of the front frame portion 331, the inclined frame portion 332, and the rear frame portion 333 are all in communication. ing. Note that the guide frame 33 has a configuration in which the inclined frame 332 is positioned higher than the base frame 31 in the middle in the longitudinal direction (Y-axis direction).

  A cargo box 2 provided above the tilting frame 3 is provided with a cargo box frame 21 that supports the floor portion and has a longitudinal direction in the vehicle longitudinal direction. In FIG. 2B, the cargo box frame 21 is indicated by a dashed-dotted phantom line, and the tilting frame 3 is configured such that the front end portion 3310 of the front frame portion 331 is in the vehicle longitudinal direction (Y-axis direction). The frame 21 is configured so as to be substantially lined up and down at substantially the same position as the tip portion 210 of the frame 21.

  As shown in FIG. 3, a leg portion 51 is fixed to the front side (Y-axis positive direction side) of the floor surface portion 2 b of the cargo box 2 mounted on the tilt frame 3. The leg portion 51 is fixed to the lower surface side of the floor surface portion 2b via a pedestal portion 21a, and the leg portion roller 511 provided outside the leg portion 51 can roll in the inner space while being guided by the guide frame 33. It is provided to become. That is, the leg 51 functions as a moving member that moves in the guide frame 33. The floor surface portion 2b is connected to the rod portion 41 of the slide cylinder 4 via a fixing bracket (not shown) fixed to the lower surface thereof. When the slide cylinder 4 extends, the leg roller 511 rolls in the guide frame 33, and the cargo box 2 also slides to the vehicle rear side (Y-axis negative direction side) according to the rolling.

  At the rear end of the guide frame 33, an arm plate 53 having a substantially L-shaped cross section is tiltable about the vehicle width direction (X-axis direction) as an axial direction via an inclined hinge shaft 52 inserted through the insertion hole 3b. Is provided. That is, the arm plate 53 can be tilted with the tilt hinge shaft 52 being pivotally supported with respect to the guide frame 33 as the second tilt axis. In each arm plate 53, two arm rollers 531 and 532 are provided on the outer side surface so as to roll in the above-described cargo box frame 21 supporting the floor portion 2b with the vehicle width direction as an axial direction. Yes. In addition, the pair of left and right cargo box frames 21 have a substantially U-shaped cross section that is open on opposite sides.

  Therefore, when the slide cylinder 4 is extended, the leg roller 511 rolls in the guide frame 33, and the cargo box 2 and the cargo box frame 21 move along with the movement. The leg roller 511 moves through the front frame portion 331, the inclined frame portion 332, and the rear frame portion 333 in order, and further moves to the vicinity of the inclined hinge shaft 52. In accordance with the rolling, the packing box 2 moves with its front side rising and inclined. As the slide cylinder 4 extends, the leg roller 511 rolls along the shape of the guide frame 33, and the leg 51 also moves along with the rolling. Due to the movement of the leg portion 51, the cargo box 2 is slid rearward of the vehicle, and is then greatly inclined and grounded (see FIG. 1B). When these load boxes 2 are tilted, the arm plate 53 tilts about the second tilt shaft (the tilt hinge shaft 52 inserted through the insertion hole 3b), so that the arm roller 531 can move the load box frame 21 favorably. To bring the grounded cargo box 2 into a state where the truck 100 can travel (see FIG. 1A), the slide cylinder 4 is contracted and the cargo box 2 is lifted to the front side of the vehicle. Slide.

  In the present embodiment, the tilting frame 3 having the above-described configuration is configured to have high durability against a load generated when the load box 2 in a grounded state is lifted, and will be specifically described with reference to FIG. . As shown in the plan view of FIG. 4A and the side view of FIG. 4B, the tilting frame 3 is formed on the upper surface of the rear frame portion 333 on the vehicle rear side (right side in the drawing) of the guide frame 33. The reinforcing plate 6 is fixed in a stacked state. Further, four plate-shaped reinforcing brackets 7 are fixed to the left and right sides of the guide frame 33 so as to stand on the outer side facing the outside in the vehicle width direction. The reinforcing plate 6 is welded to the reinforcing bracket 7 together with the upper surface of the rear frame portion 333. The reinforcing bracket 7 is welded to the base frame 31 together with the side surface of the rear frame portion 333 so as to function as a rib member for the side surface of the guide frame 33.

  The grounded packing box 2 moves to a position near the rear end of the tilting frame 3. Specifically, the leg roller 511 moves (rolls) in the guide frame 33 to a position near the inclined hinge shaft (second tilting axis) 52. The leg roller 511 rolls on the upper and lower surfaces of the guide frame 33 and is always in contact with each other. When the load box 2 is lifted from the grounded state, the load generated during the pulling is caused by the upper and lower surfaces of the guide frame 33. Directly on the bottom. In particular, when the load box 2 is in a grounded state, the slide cylinder 4 is similarly inclined along the floor surface portion 2b, so that the lifting force of the load box 2 due to the contraction force of the extended slide cylinder is reduced by the leg. This occurs in a direction in which the upper surface of the guide frame 33 is pushed upward via the partial rollers 511.

  Since the reinforcing plate 6 for holding the upper surface from above and the reinforcing bracket 7 for supporting the side surface from the side are provided with respect to the guide frame 33 according to the present embodiment, specifically the rear frame portion 333, the packing box 2 As well as improving the durability when pulling up, the generated load can be dispersed in the base frame 31 and reduced.

  With respect to the load accompanying the lifting of the packing box 2, the leg roller 511 slides toward the vehicle front side (left side in the figure) while gradually lifting the packing box 2, so that at least the inclined hinge shaft of the rear frame part 333 is provided. The reinforcing plate 6 and the reinforcing bracket 7 exhibit the effects of high durability and load reduction in the vicinity of the vehicle rear portion where 52 is provided. In particular, in the present embodiment, as shown in the enlarged view of FIG. 4C, the reinforcing plate 6 includes a widened portion 61 having a width D1 and a medium-width portion 62 having a width D2 (<D1) from the rear of the vehicle to the front of the vehicle. , And a shape having a narrow portion 63 having a width D3 (<D2), and effectively suppressing a load applied to the rear portion of the vehicle while suppressing an increase in weight due to the provision of the reinforcing plate 6. Similarly, the reinforcing bracket 7 is provided near the inclined hinge shaft 52, thereby suppressing an increase in weight and effectively reducing a load. In addition, about the suppression of weight increase and effective load reduction, it is good also as a structure with the same width | variety and thickness different from setting it as the structure from which the width | variety of each part 61-63 differs.

  In this embodiment, the reinforcing plate 6 is connected to the base frame 31 via the reinforcing bracket 7, but the reinforcing plate 6 may be welded to the base frame 31. Further, the reinforcing plate 6 and the reinforcing bracket 7 may be connected to the base frame 31 via different members.

  Further, both the reinforcing plate 6 and the reinforcing bracket 7 are provided to the guide frame 33. However, if the load on the guide frame 33 can be suppressed, either one of the reinforcing portions is provided. It may be a configuration. At least one of the upper surface (vehicle upper portion) and the side surface (vehicle side portion) of the guide frame 6, which is configured to increase the rigidity of the guide frame 33, particularly the rear frame portion 333, by the reinforcing portions 6 and 7. It contributes to the restriction of opening outward (upper side or outer side), and also to maintaining the strength of at least one of the upper surface and the side surface.

  Furthermore, as described above, the tilt frame 3 of the present embodiment is configured such that the front end portion 3310 of the front frame portion 331 is substantially in the same position in the vehicle front-rear direction with respect to the front end portion 210 of the cargo box frame 21 (FIG. 2 ( Therefore, the effect of suppressing the secular change of the guide frame 33 is enhanced.

  Specifically, a front frame portion 331 having a length L331 is provided so that the tip portions 210 and 3310 are substantially at the same position, and the leg roller 511 rolls to the tip portion 3310 of the front frame 331. Legs 51 are provided to move. That is, the leg portion 51 is provided in a state of being brought closer to the vehicle front side of the floor surface portion 2b (see FIG. 3). When the cargo box 2 is in a grounded state (see FIG. 1B), the slide cylinder in the inclination direction of the cargo box 2 (see FIG. 1B) is equivalent to the amount that the leg 51 is closer to the vehicle front side of the floor 2b. 4), the leg roller 511 can be separated from the inclined hinge shaft 52 (see FIG. 3). With this separated configuration, it is possible to suppress a load generated on the guide frame 33 via the leg rollers 511 when the cargo box 2 is pulled up.

  Moreover, since the high durability and the load suppressing effect can be obtained only by providing the reinforcing portions 6 and 7 described above, the tilt frame 3 can be prevented from being enlarged. That is, not only the effect of suppressing the increase in the weight of the truck 100 but also the prevention of an increase in the height of the cargo box 2 mounted on the tilting frame 3 and the increase in the center of gravity of the truck 100 are complicated. Can be prevented, and stability during vehicle travel can be ensured. Furthermore, for the freight vehicle 100 of the present embodiment, which is also used for loading and unloading construction machines, the tilting frame 3 does not change in position and size, so that an increase in the tilt angle of the grounded cargo box 2 can be avoided. It is also effective for loading and unloading machines.

  In addition, when the cargo box 2 is in a grounded state, the cargo box 2 is supported at a portion of the vehicle-side rear end provided with the tailgate 2a and the inclined hinge shaft 52. For this reason, even when the packing box 2 is in a grounded state, a large load is generated at a portion near the second tilting axis of the guide frame 33. However, the load is distributed by the reinforcing portions 6 and 7 described above, and the secular change of the rear frame portion 333 is caused. An inhibitory effect occurs. Since such a load is greatly applied when the construction machine gets into the cargo box 2, the effect is remarkable for the truck 100 according to the present embodiment.

  As described above, in the guide frame 33 to which a large load is applied when the cargo box 2 is pulled up, the rear side of the vehicle, particularly the portion closer to the inclined hinge shaft (second tilting shaft) is reinforced than the front side of the vehicle. Suppression has a great effect in terms of carrying both the construction machine and the lorry 100 that carries both earth and sand. That is, not only the stability of the sliding and lifting operation of the cargo box 2 is ensured, but also the secular change of the guide frame 33 disposed under the cargo box 2 when the lorry 100 is traveling as a part of the tilting frame 3. Suppression is also effective in terms of functions as a support member for the packing box 2 and the earth and sand loaded in the packing box 2 and construction machines.

  In addition, if the reinforcement parts 6 and 7 are the structures which can reinforce the vehicle rear side (2nd tilting shaft) side near the vehicle front side, an installation position and a member kind will not be restricted to what was mentioned above. For example, the reinforcing plate 6 may be provided on the side surface of the guide frame 33 instead of the reinforcing bracket 7. Further, an angle member may be used instead of the reinforcing bracket 7. The reinforcing plate 6 is not a single plate, and may be appropriately installed at a desired location as long as the strength can be improved by comparing the rear side of the vehicle with the front side of the vehicle. The number of reinforcing brackets 7 can be changed as appropriate.

  In this embodiment, the leg roller 511 is used as a member that moves in the guide frame 33, but a pad or the like is applicable as long as it contributes to the sliding of the packing box 2.

  INDUSTRIAL APPLICABILITY The present invention is useful for general trucks that can take an inclined posture by moving the cargo box backward.

1 Vehicle frame 1a Dump hinge (first tilting axis)
2 Packing box 2b Floor (packing box)
21 Packing box frame 210 Tip (packing box frame)
3 Tilt frame 31 Base frame 33 Guide frame 331 Front frame portion 3310 Front end portion (front frame portion)
332 Inclined frame portion 333 Rear frame portion 4 Slide cylinder 51 Leg portion (moving member)
511 Leg roller 52 Inclined hinge shaft (second tilting axis)
53 Arm plate 6 Reinforcement plate 61 Widened part (reinforcement plate)
62 Medium width part (reinforcement plate)
63 Narrow part (reinforcement plate)
7 Reinforcement bracket 100 Lorry

Claims (1)

A pair of left and right vehicle frames whose longitudinal direction is the longitudinal direction of the vehicle;
A tilt frame provided via a first tilt shaft so as to be tiltable with respect to the vehicle frame and having the longitudinal direction of the vehicle as a longitudinal direction;
A packing box mounted via a second tilting shaft so as to be slidable with respect to the tilting frame;
A slide cylinder provided between the tilt frame and the packing box;
A movable member fixed to the lower part of the packing box and guided by the tilting frame and movable;
A lorry equipped with
The moving member is provided to be movable to a portion near the second tilting axis,
The load box is movably mounted on the rear side of the vehicle by the extension of the slide cylinder, and when the moving member moves to a portion closer to the second tilting axis, the ground is inclined and the rear end is grounded It is mounted to be in a state,
Of the tilting frame, the guide frame for guiding the moving member has a substantially U-shaped cross section,
A reinforcement part for at least one of the vehicle upper part or the vehicle side part is provided in a portion of the guide frame near the second tilting axis ,
The lorry is characterized in that the reinforcing portion is a reinforcing plate or a reinforcing bracket fixed to the outer side of at least one of the upper surface portion and the side surface portion of the guide frame .

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