JP6968663B2 - Transport vehicle - Google Patents

Description

The present invention relates to a transport vehicle having a driver's cab below the loading platform, and the present invention relates to a transport vehicle capable of configuring a slip-in prevention device at a collision position with another vehicle.

In order to prevent the damage from spreading due to one vehicle sneaking under the other vehicle in the event of a collision, a vehicle traveling on a public road is provided with a sneak prevention device. The dive prevention device is generally attached to a frame constituting the loading platform of the vehicle (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 10-1074

However, in a transport vehicle in which a driver's cab is provided below the loading platform, the frame constituting the loading platform is arranged at a high place. The device is also arranged at a high place, and there is a problem that it is not possible to configure a sneak prevention device at a collision position with another vehicle.

In the case where the sneak prevention device is attached to the cab, the rigidity of the cab is lower than that of the frame, so that it is not possible to secure the strength of the sneak prevention device in the event of a collision with another vehicle.

The present invention has been made to solve the above-mentioned problems, and provides a transport vehicle having a driver's cab below the loading platform, which can configure a slip-in prevention device at a collision position with another vehicle. The purpose is.

In order to achieve this object, the transport vehicle of the present invention is disposed of a loading platform on which luggage is loaded, a frame forming the framework of the loading platform, a plurality of wheels supporting the loading platform, and a lower portion of the loading platform. A front beam that is arranged in front of the driver's cab and extends in the vehicle width direction, and is connected to both ends of the front beam and is arranged along the vehicle length direction. It is provided with a dive prevention device having a pair of left and right beams to be provided and a pair of left and right first pillars connecting the pair of left and right beams to the frame, and the dive prevention device is a member different from the cab. is configured, the cab, and the front beam, wherein a pair of left and right beams, and the pair of first pillar, Ru is disposed in a space surrounded by said frame.
Further, the transport vehicle of the present invention includes a loading platform on which luggage is loaded, a frame forming the framework of the loading platform, a plurality of wheels supporting the loading platform, and a driver's cab arranged below the loading platform. A front beam that is arranged in front of the driver's cab and extends in the vehicle width direction, and a pair of left and right beams that are connected to both ends of the front beam and are arranged along the vehicle length direction. The left and right beams are provided with a dive prevention device having a pair of left and right beams and a pair of left and right first pillars connecting the left and right beams to the frame, and the first pillar has a portion connected to the left and right beams and the frame. The part connected to is set at a different position in the vehicle length direction.

According to the carrier according to claim 1, the front beam which is arranged in front of the driver's cab and extends in the vehicle width direction and is connected to both ends of the front beam and is arranged along the vehicle length direction. It is provided with a dive prevention device having a pair of left and right beams and a pair of left and right first pillars connecting the pair of left and right beams to the frame, and the dive prevention device is composed of a member different from the cab. the cab includes: the front beam, wherein a pair of left and right beams, and the pair of first pillar is disposed in a space surrounded by said frame Runode, a pair mounting heights of the front beam Adjusted by the first pillar, the pair of first pillars and the front beam can be connected by a pair of left and right beams arranged along the vehicle length direction, and the front beam can be arranged at the collision position with another vehicle. There is an effect. This has the effect that, in a transport vehicle having a driver's cab below the loading platform, a sneak prevention device can be configured at a collision position with another vehicle.

According to the carrier according to claim 2, a loading platform on which luggage is loaded, a frame forming the framework of the loading platform, a plurality of wheels supporting the loading platform, and a driver's cab arranged below the loading platform. A pair of left and right front beams arranged in front of the driver's cab and extending in the vehicle width direction, and a pair of left and right beams connected to both ends of the front beams and arranged along the vehicle length direction. It is provided with a diving prevention device having a left and right beam and a pair of left and right first pillars connecting the pair of left and right beams to the frame, and the first pillar is a portion connected to the left and right beams and a portion connected to the frame. Since they are set at different positions in the vehicle length direction, there is an effect that the force of another vehicle colliding with the front beam can be easily transmitted to the frame via the first pillar.

According to the transport vehicle according to claim 3, in addition to the effect of the transport vehicle according to claim 1 or 2, the dive prevention device is a pair of left and right second pillars located between the front beam and the first pillar. The frame is connected to the left and right beams of the pair of left and right beams by the second pillar of one of the pair of second pillars, and the other second pillar of the pair of second pillars connects the two pillars. Since the frame is connected to the other left and right beams of the pair of left and right beams, when another vehicle collides with the front beam, the first pillar, the connecting portion of the left and right beams, or the first pillar, Further, there is an effect that the second pillar can prevent the dive prevention device from falling below the transport vehicle or rising above the transport vehicle by using the connecting portion of the frame as a fulcrum.

According to the transport vehicle according to claim 4, in addition to the effect of the transport vehicle according to any one of claims 1 to 3, the diving prevention device is located behind the front beam and is arranged to face the front beam. Since the rear beam interposed between the pair of left and right beams is provided, the frame-shaped structure can be configured by the front beam, the rear beam, and the pair of left and right beams. This has the effect of improving the rigidity of the dive prevention device.

According to the transport vehicle according to claim 5, in addition to the effect of the transport vehicle according to claim 4, the diving prevention device includes a connecting beam connected from the front beam to either one of the pair of left and right beams or the rear beam. Therefore, the connecting beam can be connected to the inside of the frame-shaped structure formed by the front beam, the rear beam, and the pair of left and right beams. This has the effect that the rigidity of the frame-shaped structure can be improved by the front beam, the rear beam, and the pair of left and right beams.

It is a side view of the transport vehicle in one Embodiment of this invention. (A) is a partial side view of the sneak prevention device and the loading platform, and (b) is a perspective view of the sneaking prevention device and the loading platform. (A) is a top view of the dive prevention device, and (b) is a cross-sectional view of the dive prevention device in line IIIb-IIIb of FIG. 3 (a).

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of the transport vehicle 1 according to the embodiment of the present invention. In the following description, the left side, the right side, the front side of the paper, and the back side of the paper in FIG. 1 are the front, the rear, the left, and the right of the transport vehicle 1, respectively.

First, the overall configuration of the transport vehicle 1 will be described with reference to FIG. In this embodiment, a hydraulically driven vehicle that transports heavy objects such as large steel materials and products will be described as an example of the transport vehicle 1.

As shown in FIG. 1, the transport vehicle 1 is a transport vehicle including a loading platform 2, a driver's cab 3, a plurality of traveling devices 10, and a dive prevention device 20.

The frame 5 constituting the framework of the loading platform 2 includes a pair of side beams 6. The side beam 6 is formed of a steel material having an I-shaped cross section. Further, the side beam 6 includes a first portion 6a on which the driver's cab 3 is suspended, a third portion 6c on which luggage is loaded, and a second portion 6b connecting the first portion 6a and the third portion 6c. Be prepared.

Since the mass of the load loaded on the transport vehicle 1 may reach several tens of tons, the third portion 6c is set to have higher rigidity than the first portion 6a. That is, the height of the third portion 6c in the vertical direction is set higher (larger in dimension) than that of the first portion 6a.

The height of the second portion 6b changes (widens) from the first portion 6a toward the third portion 6c so as to smoothly connect the first portion 6a and the third portion 6c having different heights. ) There is. Since the structures of the loading platform 2 other than the frame 5 are known, the details thereof will be omitted.

The driver's cab 3 includes an opening / closing door 4 that opens and closes so that an operator can get inside the driver's cab 3. Further, the driver's cab 3 is provided with a windshield (not shown) on the front surface thereof and a side glass 4a on a part of the opening / closing door 4.

Further, above the left and right sides in front of the driver's cab 3, a pair for a worker who gets into the inside of the driver's cab 3 (a worker who drives the carrier 1) can visually recognize the left and right rear of the carrier 1. Mirror 9 is arranged. The mirror 9 is adjusted to a predetermined position by a rod-shaped member connected to the lower surface of the frame 5 and attached.

The opening / closing door 4 is formed to be one size smaller than the left and right side surfaces of the driver's cab 3, and can rotate on a horizontal plane about the end of the opening / closing door 4 on the rear side of the transport vehicle 1. Further, the lower surface of the opening / closing door 4 is formed above the pair of left and right beams 22 of the dive prevention device 20, which will be described later.

The traveling device 10 is a device for driving and steering the transport vehicle 1. As a result, the transport vehicle 1 can freely travel in the front-rear direction and the left-right direction of the vehicle. Since the structure of the traveling device 10 is known, the details thereof will be omitted.

Next, the dive prevention device 20 will be described in detail with reference to FIGS. 2 and 3. FIG. 2A is a partial side view of the sneak prevention device 20 and the loading platform 2, and FIG. 2B is a perspective view of the sneaking prevention device 20 and the loading platform 2. FIG. 3A is a top view of the dive prevention device 20, and FIG. 3B is a cross-sectional view of the dive prevention device 20 in line IIIb-IIIb of FIG. 3A.

As shown in FIGS. 2 and 3, the dive prevention device 20 is arranged on the front side of the transport vehicle 1 and extends in the vehicle width direction of the transport vehicle 1 and the front beam 21 thereof. A pair of left and right left and right beams 22 connected to both ends of the carrier 1 and arranged along the vehicle length direction, and a pair of left and right beams 22 located behind the front beam 21 and facing the front beam 21. Mainly includes a rear beam 25 whose ends are connected to each other, a pair of left and right first pillars 23 which connect a pair of left and right beams 22 to a frame 5 (side beam 6), and a pair of left and right second pillars 24. It is composed of.

The front beam 21 is a member arranged at a collision position with another vehicle, is arranged in front of the front surface of the driver's cab 3, and extends outward from the driver's cab 3 in the left-right direction.

Further, the front beam 21 is formed of a steel material having a C-shaped cross section, and is arranged in a state where the opening side of the C-shaped cross section faces the rear side. As a result, the collision surface 21a can be formed on the front side of the front beam 21.

In the pair of left and right beams 22, the front side extending in the vehicle length direction is connected to the front beam 21 by welding, and the first pillar 23 is connected to the upper surface on the rear side by welding. Further, the left and right beams 22 have rear ends arranged between the driver's cab 3 and a plurality of traveling devices 10 arranged on the back surface side of the driver's cab 3 (see FIG. 1).

The pair of left and right beams 22 are arranged on both outer sides of the cab 3 in the left-right direction. As a result, the upper surfaces of the left and right beams 22 can be used as a footrest when getting into the driver's cab 3 or when getting off from the driver's cab 3, and the getting on and off of the operator can be improved.

The left and right beams 22 are formed of a steel material having a C-shaped cross section, and are arranged with the opening side of the C-shaped cross section facing inward in the facing direction of the pair of left and right beams 22. As a result, the side surfaces 22a can be formed on both outer sides of the pair of left and right beams 22 in the left-right direction.

As described above, the collision surface 21a of the front beam 21 and the side surfaces 22a of the left and right beams 22 are arranged toward the outside of the transport vehicle 1, so that when another vehicle collides with the dive prevention device 20. The collision surface can be widened. As a result, it is possible to easily disperse the force of another vehicle colliding with the dive prevention device 20, and it is possible to prevent the dive prevention device 20 from being damaged when another vehicle collides.

The pair of left and right first pillars 23 is a member that connects the pair of left and right beams 22 and the frame 5 (a pair of side beams 6), and the lower end of the first pillar 23 is on the upper surface of the left and right beams 22. It is connected, and the upper end portion of the first pillar 23 is connected to the lower surface of the side beam 6 via the first pillar bracket 23a described later.

With the pair of left and right beams 22 and the pair of left and right first pillars 23, the height of the front beam 21 is adjusted by the extension dimension of the first pillar 23, and the front and rear positions of the front beam 21 are adjusted by the left and right beams. It can be adjusted with 22 extended dimensions. As a result, in the transport vehicle 1 in which the driver's cab 3 is provided below the loading platform 2, the dive prevention device 20 can be configured at a collision position with another vehicle.

Further, the left and right ends of the front beam 21 are connected to the frame 5 via the left and right beams 22 and the first pillar 23. Therefore, the front beam 21 and the frame 5 can be arranged while avoiding the opening / closing area when opening / closing the opening / closing door 4 (see FIG. 1).

Further, in the first pillar 23, the lower end portion connected to the left and right beams 22 is arranged on the front side of the upper end portion connected to the side beam 6 of the frame 5, and the first pillar 23 is arranged. Is arranged in a state where the extension direction of the carrier 1 is inclined in the direction of the vehicle length of the carrier 1.

As a result, a part of the force generated in the front beam 21 when another vehicle collides with the front beam 21 of the transport vehicle 1 becomes the axial force of the first pillar 23 and is transmitted to the frame 5 (frame 5). A force other than (transmitted to) acts as a force for moving the front beam 21 upward or downward.

Therefore, since the force generated in the front beam 21 when another vehicle collides with the front beam 21 can be dispersed, it is possible to suppress the front beam 21 from moving upward or downward.

Further, since the upper end of the first pillar 23 is connected to the third portion 6c having high rigidity in the side beam 6, when another vehicle collides with the front beam 21, the first pillar 23 is connected to the front beam 21 to the first. The force transmitted to the frame 5 as the axial force of one pillar 23 can suppress the frame 5 from bending.

Since the lower end of the first pillar 23 is located on the front side of the upper end, the left and right beams 22 connected to the lower end of the first pillar 23 are connected in the vehicle length direction. The extension dimension to can be shortened. Therefore, the rigidity of the left and right beams 22 can be ensured by the amount that the extension dimension of the left and right beams 22 can be shortened. As a result, when another vehicle collides with the front beam 21, the left and right beams 22 can be prevented from bending and the front beam 21 can be prevented from moving up and down or left and right.

The first pillar 23 is formed of a steel material having a C-shaped cross section, and is arranged with the opening side of the C-shaped cross section facing the inside of the transport vehicle 1. Further, at the upper end of the first pillar 23, the first pillar bracket 23a is arranged above, and the upper reinforcing 23b is arranged in front of the first pillar bracket 23. Further, a lower reinforcing 23c is arranged in front of the lower end of the first pillar 23.

The first pillar bracket 23a is a plate member for arranging the first pillar 23 on the side beam 6 (frame 5), and is a bolt (not shown) for fastening the rear side of the diving prevention device 20 to the side beam 6. ) Is formed in a plurality of through holes. Further, the upper end of the first pillar 23 is joined to the lower surface of the first pillar bracket 23a by welding. Therefore, the first pillar 23 can be connected to the side beam 6 via the first pillar bracket 23a.

The upper reinforcing 23b is joined to the lower surface of the first pillar bracket 23a and the front surface of the first pillar 23 by welding. Further, the lower reinforcing 23c is joined to the upper surface of the left and right beams 22 and the front surface of the first pillar 23 by welding.

By these upper reinforcements 23b and lower reinforcements 23c, it is possible to prevent the first pillar 23 from tilting in the vehicle length direction with respect to the side beams 6 and the left and right beams 22. As a result, when another vehicle collides with the front beam 21, the dive prevention device uses the connecting portion of the first pillar 23 and the left and right beams 22 or the connecting portion of the first pillar 23 and the frame 5 as a fulcrum. It is possible to prevent the 20 from falling below the transport vehicle 1 or rising above the transport vehicle 1.

The pair of second pillars 24 is a member for suppressing the rotation of the left and right beams 22 around the connecting portion between the first pillar 23 and the left and right beams 22 or the connecting portion between the frame 5 and the first pillar 23. The lower end of the second pillar 24 is connected to the upper surface of the left and right beams 22, and the upper end of the second pillar 24 is arranged between the front beam 21 and the first pillar 23. It is connected to the lower surface of the side beam 6 via the second pillar bracket 24a described later.

Further, the pair of second pillars 24 are extended along the vertical direction. That is, the extension direction of the second pillar 24 is set to be orthogonal to the extension direction of the left and right beams 22 and the extension direction of the side beams 6. As a result, when another vehicle collides with the front beam 21, the dive prevention device 20 uses the connecting portion of the first pillar 23 and the left and right beams 22 as a fulcrum or the connecting portion of the first pillar 23 and the frame 5 as a fulcrum. The second pillar 24 can easily prevent the vehicle from falling below 1 or rising above the transport vehicle 1.

Further, the pair of second pillars 24 is a blind spot in a region that is visible to an operator who is in front of the opening / closing door 4 of the driver's cab 3 and inside the driver's cab 3 through the windshield and the side glass 4a. It is arranged at the position where. As a result, it is possible to prevent the area visible from the driver's cab 3 from being narrowed by the pair of second pillars 24.

The pair of second pillars 24 are formed of a steel material having a C-shaped cross section, and are arranged in a state where the opening side of the C-shaped cross section faces inward in the facing direction of the pair of second pillars 24. Further, a second pillar bracket 24a is arranged above the upper end of the second pillar 24. Further, a front reinforcing 24b is disposed in front of the lower end of the second pillar 24, and a lateral reinforcing 24c is disposed in the outer side surface in the left-right direction.

The second pillar bracket 24a is a plate member for arranging the second pillar 24 on the side beam 6 (frame 5), and is a bolt (not shown) for fastening the front side of the diving prevention device 20 to the side beam 6. ) Is formed in a plurality of through holes. Further, the upper end of the second pillar 24 is joined to the lower surface of the second pillar bracket 24a by welding. Therefore, the second pillar 24 can be connected to the side beam 6 via the second pillar bracket 24a.

The front reinforcing 24b is located in front of the lower end of the second column 24, and is joined to the second column 24 and the left and right beams 22 by welding. Further, the lateral reinforcement 24c is arranged on the outer side of the pair of second columns 24 in the facing direction, and is joined to the side surface of the second column 24 and the side surface of the left and right beams 22 by welding.

The front reinforcement 24b and the lateral reinforcement 24c increase the rigidity of the connecting portion between the second pillar 24 and the left and right beams 22, so that the relative movement between the second pillar 24 and the left and right beams 22 can be suppressed. As a result, it is possible to prevent the front beam 21 from moving up and down or left and right when another vehicle collides with the front beam 21.

Further, since the lateral reinforcement 24c is joined to the side surface of the second column 24 and the side surface of the left and right beams 22 by welding, the welding joint positions between the second column 24 and the left and right beams 22 are set at a plurality of positions in the vertical direction. It is possible to reduce the force acting on the welded portions of the second pillar 24 and the left and right beams 22. As a result, it is possible to prevent the joint portion of the weld between the second column 24 and the left and right beams 22 from breaking.

The rear beam 25 is located behind the front beam 21, is arranged to face the front beam 21, and both ends of the pair of left and right beams 22 are connected to each other. Thereby, the front beam 21, the rear beam 25, and the pair of left and right beams 22 can form a frame-shaped structure.

Therefore, the force input to at least one of the front beam 21, the rear beam 25, and the pair of left and right beams 22 is applied to the front beam 21, the rear beam 25, the pair of left and right beams 22, and them by the frame-like structure. Can be dispersed and supported in the connecting part of. Therefore, it is possible to suppress the concentration of the force on one place of the connecting portion of the front beam 21 and the pair of left and right beams 22, and it acts in the left-right direction of the transport vehicle 1 when another vehicle collides with the front beam 21. It is possible to prevent the front beam 21, the rear beam 25, and the pair of left and right beams 22 from being deformed by the force.

As a result, when another vehicle collides with the front beam 21, the front beam 21 projects to the left or right of the transport vehicle 1 due to the force acting in the left-right direction of the transport vehicle 1, and the structure around the transport vehicle 1 It is possible to prevent the vehicle from being involved or damaging the structure or the like around the transport vehicle 1.

Further, the rear beam 25 is arranged on the front side of the connecting portion between the first pillar 23 and the left and right beams 22. Here, when the rear beam 25 is connected to the connecting portion between the first pillar 23 and the left and right beams 22, the force applied to the three members of the first pillar 23, the left and right beams 22 and the rear beam 25 is applied to the connecting portion of the three members. Acts on (concentrates).

In the present embodiment, there is no place where the three members (first pillar 23, left and right beams 22, rear beam 25) are connected at one place (the rear beam 25 is located at a position different from the connecting part between the first pillar 23 and the left and right beams 22). The force applied to the three members of the first pillar 23, the left and right beams 22 and the rear beam 25 is applied to the connecting portion of the first pillar 23 and the left and right beams 22 and the connecting portion of the left and right beams 22 and the rear beam 25. It acts on (disperses) the two connecting parts of and, and suppresses (reduces) the force acting on each connecting part. That is, the structure is such that the connecting portion is not easily damaged.

The rear beam 25 is formed of a steel material having a C-shaped cross section, and is arranged with the opening side of the C-shaped cross section facing downward.

Further, the dive prevention device 20 includes a front beam 21, a rear beam 25, and a pair of connecting beams 26 whose ends are connected to each other inside a frame-like structure formed by a pair of left and right beams 22. The pair of connecting beams 26 are extended in the vehicle length direction, one end on the front side is connected to the front beam 21, and the other end on the rear side is connected to the connecting portion between the left and right beams 22 and the rear beam 25. ..

As a result, a triangular frame-shaped structure is formed by the front beam 21, the left and right beams 22, and the connecting beam 26 inside the frame-shaped structure formed by the front beam 21, the rear beam 25, and the pair of left and right beams 22. Can be configured.

Since the connecting beam 26 functions as a brace, the rigidity of the frame-shaped structure composed of the front beam 21, the rear beam 25, and the pair of left and right beams 22 can be improved. Therefore, the connecting angle of each connecting portion of the front beam 21, the rear beam 25, and the pair of left and right beams 22 changes due to the force acting in the left-right direction of the transport vehicle 1 when another vehicle collides with the front beam 21. Therefore, it is possible to prevent the position of the front beam 21 from being changed. As a result, the front beam 21 protrudes to the left or right of the transport vehicle 1 to involve the structures and the like around the transport vehicle 1, or damage the structures and the like around the transport vehicle 1. Can be suppressed.

Further, since the other end of the rear side of the connecting beam 26 is connected to the connecting portion between the left and right beams 22 and the rear beam 25, the connection angle between the left and right beams 22 and the rear beam 25 changes. It can be suppressed by the edge. Therefore, the rigidity of the frame-shaped structure composed of the front beam 21, the rear beam 25, and the pair of left and right beams 22 can be improved. As a result, the front beam 21 protrudes to the left or right of the transport vehicle 1 to involve the structures and the like around the transport vehicle 1, or damage the structures and the like around the transport vehicle 1. Can be suppressed.

Further, the pair of connecting beams 26 are connected in a state in which the facing distance thereof is gradually widened from the front beam 21 side to the rear beam 25 side in the top view. As a result, the force that another vehicle collides with the front beam 21 and the front beam 21 is pushed backward can be easily transmitted to the first pillar 23 along the extending direction of the connecting beam 26. As a result, the force of another vehicle colliding with the front beam 21 can be easily transmitted to the frame 5 via the connecting beam 26 and the first pillar 23. That is, it is possible to prevent the front beam 21 from being deformed and another vehicle that has collided from slipping under the carrier vehicle 1.

The driver's cab 3 has a frame-like structure composed of a front beam 21, a rear beam 25, and a pair of left and right beams 22, a pair of first pillars 23, a pair of second pillars 24, and a frame. It is arranged inside the space surrounded by 5 and (see FIG. 1).

Further, the pair of first pillars 23 and the pair of second pillars 24 are arranged inside the left and right ends of the loading platform 2 (frame 5), and the pair of mirrors 9 are arranged outside the left and right ends of the loading platform 2. Therefore, when the operator visually recognizes the left and right rear parts of the transport vehicle 1 by the mirror 9, the left and right side surfaces of the loading platform 2 (transport vehicle 1) become blind spots of the first pillar 23 and the second pillar 24. This can be suppressed (see FIG. 1).

The first pillar 23 and the second pillar 24 (sneaking prevention device 20) are formed by bolts (not shown) inserted through the openings formed through the first pillar bracket 23a and the second pillar bracket 24a. It is fastened to the frame 5 (side beam 6).

Further, the dive prevention device 20 includes a pair of steps 27 connected to the pair of left and right beams 22 and extended inside the vehicle, a gate-shaped mounting base arranged on the upper surfaces of the connecting beams 26 and the rear beams 25. 28 and.

The step 27 is a portion used by the operator as a footrest when getting into the driver's cab 3 or getting off from the driver's cab 3, and is formed in a plate shape having a predetermined area on the upper surface.

Further, the step 27 is connected to the opposite side surfaces of the pair of left and right beams 22, and the upper surface is set to be at the same height as the upper surfaces of the left and right beams 22. As a result, the area that can be used as a footrest when getting into the driver's cab 3 or getting off from the driver's cab 3 can be increased by the amount of the upper surface of the left and right beams 22. As a result, it is possible to improve the ease of getting on and off the worker.

Further, the step 27 is arranged at a position where the portion extending inside the vehicle vertically overlaps with the connecting beam 26. As a result, when a load exceeding a specified value is applied to step 27, the load can be supported by the connecting beam 26. As a result, it is possible to prevent the step 27 from being excessively deformed.

The mounting base 28 is a base for mounting a capacitor of an air conditioner that controls the room temperature of the cab 3, one end formed in a gate shape is connected to the upper surface of the connecting beam 26, and the other end formed in a gate shape is a rear beam. It is connected to the upper surface of 25. As a result, the mounting base 28 can prevent the arrangement of the connecting beam 26 and the rear beam 25 from changing. Therefore, the rigidity of the frame-shaped structure composed of the front beam 21, the rear beam 25, and the pair of left and right beams 22 can be improved.

Although the present invention has been described above based on the above-described embodiment, the present invention is not limited to the above-described embodiment, and it is easy to make various modifications and improvements within a range that does not deviate from the gist of the present invention. It can be inferred.

In the above embodiment, the case where the opening / closing door 4 of the driver's cab 3 is opened / closed toward the outside of the driver's cab 3 has been described, but the present invention is not limited to this. It may be arranged so as to open and close inward. In this case, when arranging the left and right beams 22, the first pillar 23, and the second pillar 24 of the dive prevention device 20, it is not necessary to consider the displacement locus of the opening / closing door 4, so that the left and right beams 22, the first pillar The degree of freedom when arranging the 23 and the second pillar 24 can be improved.

In the above embodiment, in the first pillar 23, the lower end portion connected to the left and right beams 22 is arranged on the front side of the upper end portion connected to the side beam 6 of the frame 5. However, the present invention is not limited to this, and for example, the lower end portion of the first pillar 23 may be arranged behind the upper end portion of the first pillar.

In the above embodiment, the case where the upper end portion of the first pillar 23 connected to the side beam 6 of the frame 5 is connected to the third portion 6c of the side beam 6 has been described, but is not necessarily limited to this. However, for example, the upper end portion of the first pillar 23 may be connected to the lower surface of the second portion 6b of the side beam 6.

In this case, since the connecting surface between the first pillar 23 and the side beam 6 can be brought closer to the direction orthogonal to the extending direction of the first pillar 23, the first pillar 23 is located along the extending direction of the first pillar 23. It is possible to suppress that the force transmitted from the 1 pillar 23 to the frame 5 (side beam 6) acts in the direction of shearing the connecting portion between the first pillar 23 and the side beam 6. As a result, the force can be easily transmitted from the first pillar 23 to the frame 5.

In the above embodiment, the case where the other end of the connecting beam 26 on the rear side is connected to the connecting portion between the left and right beams 22 and the rear beam 25 has been described, but the present invention is not limited to this, and for example, the connecting beam 26 is used. The other end of the rear side may be connected to only one of the left and right beams 22 or the rear beam 25.

In this case as well, as in the above embodiment, since the connecting beam 26 is connected inside the frame-shaped structure composed of the front beam 21, the rear beam 25, and the pair of left and right beams 22, the connecting beam 26 is braced. Can function as. As a result, the rigidity of the frame-shaped structure composed of the front beam 21, the rear beam 25, and the pair of left and right beams 22 can be improved.

When the other end of the connecting beam 26 on the rear side is connected to the left and right beams 22, a triangular frame composed of the front beam 21, the left and right beams 22, and the connecting beam 26 is the same as in the above embodiment. Since the shaped structure can be constructed, the rigidity of the frame-shaped structure composed of the front beam 21, the rear beam 25, and the pair of left and right beams 22 can be improved.

In the above embodiment, the case where the connecting portion between the first pillar 23 and the left and right beams 22 is located behind the connecting portion between the rear beam 25 and the left and right beams 22 has been described, but the present invention is not limited to this. The connecting portion between the first pillar 23 and the left and right beams 22 may be arranged in front of the connecting portion between the rear beam 25 and the left and right beams 22.

In the above embodiment, the case where the front beam 21, the left and right beams 22, the first pillar 23, the second pillar 24, and the rear beam 25 are formed in a C-shaped cross section has been described, but the manufacturing method thereof is, for example, the cross section C. It may be formed from a shaped channel steel, or may be formed by joining a plurality of plates to form a C-shaped cross section. Further, the front beam 21, the left and right beams 22, the first pillar 23, the second pillar 24, and the rear beam 25 are not limited to a C-shaped cross section, and may be formed of, for example, a rod-shaped member having a square cross section. , May be formed from a pipe-shaped member having a square cross section.

1 Transport vehicle 2 Loading platform 3 Driver's cab 5 Frame 6 Side beam 10 Traveling device (wheel)
20 Sneaking prevention device 21 Front beam 22 Left and right beams 23 First pillar 24 Second pillar 25 Rear beam 26 Connecting beam

Claims (5)

The loading platform on which luggage is loaded and
The frame that forms the framework of the loading platform and
With a plurality of wheels supporting the loading platform,
In a transport vehicle provided with a driver's cab disposed below the loading platform.
A front beam arranged in front of the driver's cab and extending in the vehicle width direction, a pair of left and right beams connected to both ends of the front beam and arranged along the vehicle length direction, and them. It is provided with a dive prevention device having a pair of left and right first pillars connecting the pair of left and right beams to the frame .
The dive prevention device is composed of a member different from that of the driver's cab.
The cab includes: the front beam, wherein a pair of left and right beams, and the pair of first pillar is disposed in a space surrounded by said frame-carrying vehicle characterized by Rukoto. The loading platform on which luggage is loaded and
The frame that forms the framework of the loading platform and
With a plurality of wheels supporting the loading platform,
In a transport vehicle provided with a driver's cab disposed below the loading platform.
A front beam arranged in front of the driver's cab and extending in the vehicle width direction, a pair of left and right beams connected to both ends of the front beam and arranged along the vehicle length direction, and them. It is provided with a dive prevention device having a pair of left and right first pillars connecting the pair of left and right beams to the frame.
The first pillar includes a portion coupled to the left and right beams, and a portion connected to said frame, transportable you characterized by being set in different positions in the vehicle length direction Okukuruma. The dive prevention device includes a pair of left and right second pillars located between the front beam and the first pillar, and the pair of left and right beams are provided by the second pillar of one of the pair of second pillars. The left and right beams of one of the left and right beams and the frame are connected, and the left and right beams and the frame of the other of the pair of left and right beams are connected by the second pillar of the other of the pair of second pillars. The carrier according to claim 1 or 2, characterized in that they are connected. 13. The carrier described in either. The transport vehicle according to claim 4, wherein the diving prevention device includes a connecting beam connected to either one of the pair of left and right beams or the rear beam from the front beam.

Images