JP7626680B2 - Refuse collection truck - Google Patents

Description

The present invention relates to a garbage collection vehicle capable of measuring the weight of garbage.

Refuse collection vehicles capable of measuring the weight of refuse have been known for some time. Patent Document 1 describes a refuse collection vehicle that has bar-type load cells installed between the left and right chassis frames and the cargo box, and that uses these load cells to measure the weight of refuse. In the above-mentioned refuse collection vehicle, the load cells are installed on the front and rear of the left and right chassis frames. A frame (hereinafter referred to as the cargo box support frame) that extends in the fore-and-aft direction of the vehicle is installed at the bottom of the cargo box. The cargo box is supported by the load cells via the cargo box support frame.

Patent No. 5623300

The cargo box support frame rests on front and rear load cells, and is supported at both ends by these load cells. When the weight of garbage in the cargo box increases, the cargo box support frame tends to flex and deform, with the center sinking. However, when the cargo box support frame flexes, the load applied from the cargo box support frame to the load cell tilts from the vertical, reducing the measurement accuracy of the load cell. To improve the measurement accuracy of the garbage weight, it is desirable to suppress the flexure of the cargo box support frame. It is desirable to increase the rigidity of the cargo box support frame against bending in the vertical direction.

Figure 11 is a cross-sectional view of the packing box support frame disclosed in Patent Document 1. This packing box support frame 100 is composed of frame members 101, 102 with a U-shaped cross section. Here, in order to increase the rigidity against bending in the vertical direction, it is possible to increase the vertical dimension H100 of the packing box support frame 100. However, if the vertical dimension of the packing box support frame is increased, the position of the packing box will be higher, and the position of the garbage inlet of the packing box will also be higher. This may reduce the efficiency of the worker's work of putting garbage into the garbage inlet.

In order to increase the rigidity against bending in the vertical direction, it is possible to increase the plate thicknesses t101, t102 of the frame members 101, 102. However, simply increasing the plate thicknesses t101, t102 would increase the rigidity, but would result in an increase in the weight of the box support frame 100.

The present invention was made in consideration of these points, and its purpose is to prevent a decrease in the measurement accuracy of the garbage weight caused by the bending of the box support frame, while suppressing the rise in the position of the garbage inlet and the increase in weight, in a garbage collection vehicle capable of measuring the garbage weight.

The refuse collection vehicle according to the present invention comprises a chassis frame extending in the fore-and-aft direction of the vehicle, bar-type load cells provided at the front and rear of the chassis frame, a cargo box support frame extending in the fore-and-aft direction of the vehicle and supported by the bar-type load cells, and a cargo box having a refuse inlet formed therein and supported by the cargo box support frame. The cargo box support frame has an upper plate extending in the fore-and-aft and left-and-right directions of the vehicle, a lower plate located below the upper plate and extending in the fore-and-aft and left-and-right directions of the vehicle, and one or more vertical plates joined to the upper plate and the lower plate and extending in the fore-and-aft and up-and-down directions of the vehicle. The thickness of the upper plate is greater than the thickness of the vertical plates, and the thickness of the lower plate is greater than the thickness of the vertical plates.

The above-mentioned garbage collection vehicle increases the thickness of the upper and lower plates while reducing the thickness of the vertical plates, so the moment of inertia can be increased while reducing the increase in the vertical dimension and cross-sectional area of the packing box support frame. This makes it possible to suppress the rise in the position of the garbage inlet and the increase in the weight of the packing box support frame, while also suppressing the decrease in the measurement accuracy of the garbage weight caused by the bending of the packing box support frame.

The thickness of the upper plate and the lower plate is not particularly limited. The thickness of the upper plate may be more than twice the thickness of the vertical plate, and the thickness of the lower plate may be more than twice the thickness of the vertical plate.

The vertical dimension at the rear end of the packing box support frame may be 1 to 1.3 times the horizontal dimension.

As a result, the vertical dimension at the rear end of the packing box support frame is relatively small, effectively preventing the position of the garbage inlet from rising.

The vertical plate may have an inner plate, a front outer plate arranged on the outer side of the inner plate in the vehicle width direction, and a rear outer plate arranged at a position spaced rearward from the front outer plate and on the outer side of the inner plate in the vehicle width direction. A bolt hole may be formed in the lower plate rearward of the front outer plate and in front of the rear outer plate, into which a bolt is inserted to fix the cargo box support frame to the bar-type load cell.

As a result, when the cargo box support frame is viewed from the outside in the vehicle width direction, the space between the front outer panel and the rear outer panel is open, making it easy to fasten the bolts to the bolt holes. This makes it easy to fasten the cargo box support frame to the bar-type load cell while still achieving the aforementioned effects.

The shapes of the inner plate, the front outer plate, and the rear outer plate are not particularly limited. The inner plate may be formed in a flat plate shape, and the front outer plate may be formed in a U-shaped cross section.

The rear outer plate may have a bottom surface joined to the lower plate and a slope extending diagonally upward and forward from the front end of the bottom surface and spaced apart from the lower plate.

As a result, when viewed from the outside in the vehicle width direction, the rear outer panel has a shape as if the front lower portion has been cut off. Therefore, when a bending load is applied to the cargo box support frame, stress concentration in the front lower portion of the rear outer panel can be avoided. Therefore, there is no need to add reinforcing members to prepare for such stress concentration, which further reduces weight increase.

According to the present invention, in a garbage collection vehicle capable of measuring garbage weight, it is possible to suppress the rise in the position of the garbage inlet and the increase in weight, while suppressing the decrease in the measurement accuracy of the garbage weight caused by the bending of the packing box support frame.

FIG. 2 is a left side view of the refuse collection vehicle according to the embodiment. FIG. FIG. 2 is a side view of the shipping box support frame. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 4 is a cross-sectional view taken along line VV in FIG. 3. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 13 is a side view of the first rear outer panel. FIG. 13 is a side view of the second rear outer panel. FIG. 13 is a side view of the third rear outer panel. 1A and 1B are diagrams illustrating an example of a cross-sectional shape of a beam supported at both ends. FIG. 11 is a cross-sectional view of a packing box support frame of a conventional refuse collection vehicle.

Figure 1 is a left side view of a refuse collection vehicle 1 according to this embodiment. Figure 2 is a plan view of the refuse collection vehicle 1. As shown in Figure 1, the refuse collection vehicle 1 includes a cab 2, a chassis frame 4, a bar-type load cell (hereinafter simply referred to as a load cell) 6, a cargo box support frame 10, and a cargo box 3. A subframe 5 is fixed onto the chassis frame 4.

A pair of chassis frames 4 and subframes 5 are provided on the left and right. The chassis frames 4 and subframes 5 extend in the fore-and-aft direction of the vehicle. The load cells 6 are mounted on the front and rear of the left and right subframes 5. The load cells 6 are provided on the front and rear of the chassis frame 4 via the subframes 5. The front and rear of the chassis frame 4 refer to the portions forward and rearward, respectively, of the chassis frame 4's midpoint in the fore-and-aft direction of the vehicle. The refuse collection vehicle 1 is equipped with a total of four load cells 6. The refuse weight is calculated based on the sum of the vertical loads detected by the four load cells 6. An indicator 60 that displays the refuse weight is provided inside the cab 2.

The packing box 3 has a garbage collection box 3A and a garbage dump box 3B. The garbage collection box 3A has an opening 3a that opens toward the rear, and the garbage dump box 3B is rotatably connected to the garbage collection box 3A via a hinge 3d provided at the upper end. When the garbage dump box 3B is rotated upward, the opening 3a of the garbage collection box 3A can be opened. A garbage dump port 3b is formed at the rear of the garbage dump box 3B. The garbage dump port 3b opens toward the rear. The garbage dump port 3b is covered by an openable cover 3c.

The cargo box support frame 10 is provided on the bottom of the cargo box 3, more specifically, on the bottom of the garbage storage box 3A. The cargo box support frame 10 is made of metal. The cargo box support frame 10 extends in the front-rear direction of the vehicle, and is provided in pairs on the left and right. FIG. 3 is a left side view of the left cargo box support frame 10. In other words, FIG. 3 is a view of the left cargo box support frame 10 as seen from the outside in the vehicle width direction. The right cargo box support frame 10 has a shape symmetrical to the left cargo box support frame 10. Below, the configuration of the left cargo box support frame 10 will be described, and the configuration of the right cargo box support frame 10 will be omitted. The cargo box support frame 10 is supported by the front load cell 6 and the rear load cell 6. The cargo box support frame 10 is supported at both front and rear ends by the front and rear load cells 6.

Figures 4, 5, and 6 are cross-sectional views taken along lines IV-IV, V-V, and VI-VI in Figure 3, respectively. In the cargo box support frame 10, the vertical dimension H10 is equal to or greater than the horizontal dimension B10. As shown in Figures 4 to 6, the cargo box support frame 10 has an upper plate 11 and a lower plate 12 that extend in the vehicle front-rear and left-right directions. The lower plate 12 is located below the upper plate 11. As shown in Figure 3, the lower plate 12 extends horizontally. The upper plate 11 is inclined downward toward the rear. The cargo box support frame 10 is formed so that the vertical dimension H10 decreases toward the rear. However, the shape of the cargo box support frame 10 in a side view is not particularly limited. The upper plate 11 may extend horizontally. The vertical dimension H10 of the cargo box support frame 10 may be constant. As shown in FIG. 6, in this embodiment, the vertical dimension H10 at the rear end of the box support frame 10 is set to 1 to 1.3 times the left-right dimension B10. The vertical dimension H10 at the rear end of the box support frame 10 is smaller than that at the front end.

As shown in Figures 4 to 6, the cargo box support frame 10 has an inner plate 13 that extends in the vehicle front-rear and up-down directions. The inner plate 13 extends from the front end to the rear end of the upper plate 11 and the lower plate 12. The inner plate 13 is disposed on the inside in the vehicle width direction. That is, in the left cargo box support frame 10, the inner plate 13 is disposed on the right side, and in the right cargo box support frame 10, the inner plate 13 is disposed on the left side. The inner plate 13 is formed in a flat plate shape. As shown in Figure 5, the upper end of the inner plate 13 is joined to the lower surface of the upper plate 11. In addition, the lower end of the inner plate 13 is joined to the upper surface of the bottom plate portion 14b of the front outer plate 14 described below. However, this is not limited. The lower end of the inner plate 13 may be directly joined to the lower plate 12.

As shown in FIG. 4, the cargo box support frame 10 has a front outer plate 14 arranged on the outside of the inner plate 13 in the vehicle width direction. In the left cargo box support frame 10, the front outer plate 14 is arranged on the left side, and in the right cargo box support frame 10, the front outer plate 14 is arranged on the right side. The front outer plate 14 extends in the vehicle front-rear direction and up-down direction. The front outer plate 14 is joined to the upper plate 11 and the lower plate 12. Here, the front outer plate 14 is welded to the lower surface of the upper plate 11 and the upper surface of the lower plate 12. The front outer plate 14 is a shaped steel and is formed with a U-shaped cross section. That is, the front outer plate 14 includes a top plate portion 14a extending left and right, a bottom plate portion 14b extending left and right, and a side plate portion 14c extending up and down. The top plate portion 14a is joined to the upper plate 11, and the bottom plate portion 14b is joined to the lower plate 12. In the cross section shown in FIG. 4, the lower end of the inner plate 13 is joined to the lower plate 12 via the bottom plate portion 14b.

As shown in FIG. 6, the cargo box support frame 10 has a first rear outer plate 15, a second rear outer plate 16, and a third rear outer plate 17 arranged on the outer side of the inner plate 13 in the vehicle width direction. The first rear outer plate 15, the second rear outer plate 16, and the third rear outer plate 17 each extend in the vehicle front-rear direction and the up-down direction, and are formed in a flat plate shape. The first rear outer plate 15 is arranged on the outer side of the inner plate 13 in the vehicle width direction. The second rear outer plate 16 is arranged on the outer side of the first rear outer plate 15 in the vehicle width direction. The third rear outer plate 17 is arranged on the outer side of the second rear outer plate 16 in the vehicle width direction. The second rear outer plate 16 is spaced apart from the first rear outer plate 15. The third rear outer plate 17 is overlapped with the second rear outer plate 16.

The first rear outer plate 15, the second rear outer plate 16, and the third rear outer plate 17 are joined to the upper plate 11 and the lower plate 12. The second rear outer plate 16 and the third rear outer plate 17 are joined to each other. Here, the first rear outer plate 15, the second rear outer plate 16, and the third rear outer plate 17 are welded to the upper plate 11 and the lower plate 12. The second rear outer plate 16 and the third rear outer plate 17 are joined to each other. The upper end of the first rear outer plate 15 is joined to approximately the center in the left-right direction of the lower surface of the upper plate 11, and the lower end of the first rear outer plate 15 is joined to approximately the center in the left-right direction of the upper surface of the lower plate 12. The upper end of the second rear outer plate 16 is joined to the outer end in the vehicle width direction of the lower surface of the upper plate 11, and the lower end of the second rear outer plate 16 is joined to the outer end in the vehicle width direction of the upper surface of the lower plate 12. The third rear outer plate 17 is joined to the end faces of the upper plate 11 and the lower plate 12 in the vehicle width direction.

The inner plate 13, the front outer plate 14, the first rear outer plate 15, the second rear outer plate 16, and the third rear outer plate 17 are examples of vertical plates according to the present invention.

7, 8, and 9 are side views of the first rear outer plate 15, the second rear outer plate 16, and the third rear outer plate 17, respectively. The first rear outer plate 15, the second rear outer plate 16, and the third rear outer plate 17 are formed with holes 15h, 16h, and 17h, respectively. Although not shown in the figures, the garbage collection vehicle 1 is equipped with a hook (not shown) that is attached to the packing box support frame 10 at the bottom of the garbage storage box 3A via a mounting bracket. This hook is adapted to restrict the rotation of the garbage drop box 3B (see FIG. 1) by engaging with an engaged portion (not shown) provided on the garbage drop box 3B. A drive shaft for rotating the hook is inserted into the holes 15h, 16h, and 17h.

As shown in FIG. 8, the second rear outer plate 16 has corners at its four corners. The second rear outer plate 16 has a bottom surface 16d joined to the lower plate 12, a front surface 16f extending upward from the front end of the bottom surface 16d, a rear surface 16b extending upward from the rear end of the bottom surface 16d, and a top surface 16u joined to the upper plate 11. The front surface 16f is slightly longer in the vertical direction than the rear surface 16b. When viewed from the side, the angle between the bottom surface 16d and the front surface 16f is a right angle, and the angle between the bottom surface 16d and the rear surface 16b is also a right angle. When viewed from the side, the angle between the top surface 16u and the front surface 16f is approximately a right angle, and the angle between the top surface 16u and the rear surface 16b is approximately a right angle.

As shown in FIG. 7, the first rear outer plate 15 is formed in a shape in which the four corners are cut. In detail, the first rear outer plate 15 has a bottom surface 15d joined to the lower plate 12, a front lower inclined surface 15fd extending obliquely upward from the front end of the bottom surface 15d, and a front surface 15f extending upward from the front end of the front lower inclined surface 15fd. The first rear outer plate 15 also has a rear lower inclined surface 15bd extending obliquely upward from the rear end of the bottom surface 15d, and a rear surface 15b extending upward from the rear end of the rear lower inclined surface 15bd. The first rear outer plate 15 has an upper surface 15u joined to the upper plate 11, a front upper inclined surface 15fu extending obliquely downward from the front end of the upper surface 15u, and a rear upper inclined surface 15bu extending obliquely downward from the rear end of the upper surface 15u. The front lower inclined surface 15fd and the rear lower inclined surface 15bd are spaced apart from the lower plate 12. The front upper inclined surface 15fu and the rear upper inclined surface 15bu are spaced apart from the upper plate 11. This configuration prevents stress concentration at the corners of the first rear outer plate 15 when a bending load is applied to the packing box support frame 10. When viewed from the side, the angle between the bottom surface 15d of the first rear outer plate 15 and the front lower inclined surface 15fd, and the angle between the bottom surface 15d and the rear lower inclined surface 15bd are not particularly limited, but may be, for example, 120 degrees to 150 degrees, or 130 degrees to 140 degrees.

Similarly, as shown in FIG. 9, the third rear outer plate 17 is formed in a shape in which the four corners are cut. In detail, the third rear outer plate 17 has a bottom surface 17d joined to the lower plate 12, a front lower inclined surface 17fd extending obliquely upward from the front end of the bottom surface 17d, and a front surface 17f extending upward from the front end of the front lower inclined surface 17fd. The third rear outer plate 17 also has a rear lower inclined surface 17bd extending obliquely upward from the rear end of the bottom surface 17d, and a rear surface 17b extending upward from the rear end of the rear lower inclined surface 17bd. The third rear outer plate 17 has an upper surface 17u joined to the upper plate 11, a front upper inclined surface 17fu extending obliquely downward from the front end of the upper surface 17u, and a rear upper inclined surface 17bu extending obliquely downward from the rear end of the upper surface 17u. The front lower inclined surface 17fd and the rear lower inclined surface 17bd are spaced apart from the lower plate 12. The front upper inclined surface 17fu and the rear upper inclined surface 17bu are spaced apart from the upper plate 11. This configuration prevents stress concentration at the corners of the third rear outer plate 17 when a bending load is applied to the packing box support frame 10. When viewed from the side, the angle between the bottom surface 17d of the third rear outer plate 17 and the front lower inclined surface 17fd, and the angle between the bottom surface 17d and the rear lower inclined surface 17bd are not particularly limited, but may be, for example, 120 degrees to 150 degrees, or 130 degrees to 140 degrees.

As shown in FIG. 3, the third rear outer plate 17 is disposed rearward of the front outer plate 14 and is spaced apart from the front outer plate 14. Similarly, the first rear outer plate 15 and the second rear outer plate 16 are disposed rearward of the front outer plate 14 and are spaced apart from the front outer plate 14. The first rear outer plate 15, the second rear outer plate 16, and the third rear outer plate 17 have front ends spaced rearward from the rear end of the front outer plate 14. A front partition plate 18 extending in the left-right direction and the up-down direction is provided at the rear end of the front outer plate 14. A rear partition plate 19 extending in the left-right direction and the up-down direction is provided at the front ends of the first rear outer plate 15, the second rear outer plate 16, and the third rear outer plate 17. The front partition plate 18 and the rear partition plate 19 are joined to the upper plate 11 and the lower plate 12. The rear partition plate 19 is disposed rearward of the front partition plate 18 and is spaced apart from the front partition plate 18. A space 20 that is open outward in the vehicle width direction is formed behind the front partition plate 18 and in front of the rear partition plate 19. Although not particularly limited, in this embodiment, the space 20 is divided by the front partition plate 18, the rear partition plate 19, the upper plate 11, the lower plate 12, and the inner plate 13.

As shown in FIG. 5, a bolt hole 12h is formed in the lower plate 12 behind the front partition plate 18 and in front of the rear partition plate 19. The bolt hole 12h is formed in the lower plate 12 behind the front outer plate 14 and in front of the first to third rear outer plates 15 to 17. In this embodiment, there are two bolt holes 12h, but the number of bolt holes 12h is not particularly limited. A bolt 22 that fixes the cargo box support frame 10 to the rear load cell 6 is inserted into the bolt hole 12h. The lower plate 12 of the cargo box support frame 10 is fixed to the rear load cell 6 by the bolt 22. Since the bolt hole 12h is formed in the space 20 that opens outward in the vehicle width direction, the bolt 22 can be easily fastened from the outside in the vehicle width direction.

As shown in FIG. 3, an arc-shaped cutout 14c is formed in the front of the front outer plate 14. Inside the cutout 14c, another space 24 is formed that opens outward in the vehicle width direction. Another bolt hole (not shown) is formed in the lower plate 12 on the side of the cutout 14c, and another bolt 26 that fixes the cargo box support frame 10 to the front load cell 6 is inserted into the other bolt hole. The lower plate 12 of the cargo box support frame 10 is fixed to the front load cell 6 by the bolt 26.

The box support frame 10 supports the box 3 and is supported by the front and rear load cells 6, so it can be considered as a beam supported at both ends receiving a uniformly distributed load. Here, the deflection W at the center of a beam supported at both ends with a length of l receiving a uniformly distributed load q is expressed as follows, assuming that the Young's modulus is E and the second moment of area is I:
W=(5ql ⁴ )/(384EI)... (1)
The larger the second moment of area I is, the smaller the deflection W is.
For example, in the case of a beam having a hollow cross-sectional shape as shown in FIG. 10, the second moment of area I is given by:
I=(BH ³ - bh ³ )/12... (2)
It is.

If the box support frame 10 is considered to be a beam supported at both ends by the load cell 6, the smaller the deflection W, the closer to vertical the direction of the load that the load cell 6 receives from the box support frame 10, and the higher the measurement accuracy of the load cell 6. As can be seen from the above formula (1), the larger the second moment of area I, the smaller the deflection W.

According to the above formula (2), the larger the vertical dimension H of the beam, the larger the second moment of area I. Therefore, in order to improve the measurement accuracy of the load cell 6, it is possible to increase the vertical dimension H10 (see Figure 3) of the box support frame 10.

However, in the refuse collection vehicle 1, as shown in FIG. 1, the packing box 3 is placed on the packing box support frame 10. Increasing the vertical dimension of the packing box support frame 10 increases the height of the packing box 3 above the ground. When the height of the packing box 3 above the ground increases, the position of the garbage inlet 3b increases, making it difficult for a work vehicle to put garbage into the garbage inlet 3b. The efficiency of the garbage input operation decreases. Because of these issues unique to the refuse collection vehicle 1, it is not desirable to increase the vertical dimension of the packing box support frame 10.

In order to increase the rigidity of the beam without increasing its vertical dimension H, it is possible to adopt a steel section with increased plate thickness in the vertical and horizontal directions while maintaining the vertical dimension H of the beam. In other words, it is possible to reduce h and b in Figure 10.

However, if the thickness of the box support frame 10 is increased, the weight of the box support frame 10 increases. If the thickness of the box support frame 10 in both the vertical and horizontal directions is uniformly increased (equivalent to uniformly reducing h and b in FIG. 10), the weight of the box support frame 10 will increase significantly.

As can be seen from the above formula (2), the geometric moment of inertia I increases as b and h decrease, but since the power of b in the formula is 1 while the power of h is 3, the influence of h on the magnitude of the geometric moment of inertia I is greater than that of b. Therefore, by decreasing h without decreasing b or while suppressing the decrease in b, the geometric moment of inertia I can be increased while suppressing the degree of weight increase. Therefore, by increasing the vertical thickness while maintaining or suppressing the increase in the horizontal thickness of the packing box support frame 10, the deflection of the packing box support frame 10 can be effectively suppressed, and the measurement accuracy of the load cell 6 can be improved.

As shown in FIG. 4, in the cargo box support frame 10 according to this embodiment, the plate thickness t11 of the upper plate 11 is greater than the plate thickness t13 of the inner plate 13 and greater than the plate thickness t14 of the front outer plate 14. The plate thickness t11 of the upper plate 11 may be greater than twice the plate thickness t13 of the inner plate 13, or may be greater than twice the plate thickness t14 of the front outer plate 14. The larger t11 is, the higher the rigidity is, but in order to suppress an increase in the weight of the cargo box support frame 10, t11 may be three times or less than t13, or may be three times or less than t14. However, this is not particularly limited. t13 and t14 may be equal or different.

The thickness t12 of the lower plate 12 is greater than the thickness t13 of the inner plate 13 and greater than the thickness t14 of the front outer plate 14. The thickness t12 of the lower plate 12 may be greater than twice the thickness t13 of the inner plate 13, or greater than twice the thickness t14 of the front outer plate 14. To suppress an increase in the weight of the packing box support frame 10, t12 may be less than three times t13, or less than three times t14. However, there is no particular limitation. The thickness t11 of the upper plate 11 and the thickness t12 of the lower plate 12 may be equal to or different from each other.

As shown in FIG. 6, the thickness t11 of the upper plate 11 is greater than the thickness t15 of the first rear outer plate 15, greater than the thickness t16 of the second rear outer plate 16, and greater than the thickness t17 of the third rear outer plate 17. The thickness t12 of the lower plate 12 is greater than the thickness t15 of the first rear outer plate 15, greater than the thickness t16 of the second rear outer plate 16, and greater than the thickness t17 of the third rear outer plate 17. Here, the thickness t15 of the first rear outer plate 15, the thickness t16 of the second rear outer plate 16, and the thickness t17 of the third rear outer plate 17 are greater than the thickness t13 of the inner plate 13 and greater than the thickness t14 of the front outer plate 14. However, there is no particular limitation. t15, t16, and t17 may be equal to each other or different.

The above is the configuration of the refuse collection vehicle 1 according to this embodiment. According to the refuse collection vehicle 1 according to this embodiment, the thickness of the vertical plates (inner plate 13, front outer plate 14, first rear outer plate 15, second rear outer plate 16, third rear outer plate 17) of the packing box support frame 10 is reduced while the thickness of the upper plate 11 and the lower plate 12 is increased, so that the deflection of the packing box support frame 10 can be suppressed while suppressing an increase in the vertical dimension and cross-sectional area of the packing box support frame 10. Therefore, it is possible to suppress a decrease in the measurement accuracy of the garbage weight caused by the deflection of the packing box support frame 10 while suppressing an increase in the position of the garbage inlet 3b and an increase in the weight of the packing box support frame 10.

According to this embodiment, the vertical dimension H10 at the rear end of the packing box support frame 10 is 1 to 1.3 times the left-right dimension B10 (see FIG. 6). Because the vertical dimension H10 of the packing box support frame 10 is relatively small, the rise in the position of the garbage inlet 3b can be effectively prevented. Since workers can easily insert garbage into the garbage inlet 3b, the garbage insertion work can be performed efficiently.

According to this embodiment, the first to third rear outer plates 15 to 17 are spaced rearward from the front outer plate 14. Bolt holes 12h into which bolts 22 are inserted are formed in the lower plate 12 behind the front outer plate 14 and in front of the first to third rear outer plates 15 to 17. The space between the front outer plate 14 and the first to third rear outer plates 15 to 17 is open to the outside in the vehicle width direction. This makes it easy to fasten the bolts 22 into the bolt holes 12h from the outside in the vehicle width direction. This makes it easy to fix the cargo box support frame 10 to the load cell 6.

When a bending load is applied to the box support frame 10, a relatively large stress tends to occur in the vicinity of the bolt 22 that fixes the load cell 6 and the lower plate 12. However, according to this embodiment, as shown in Figs. 7 and 9, the first rear outer plate 15 and the third rear outer plate 17 have a shape in which the front lower part is cut. The first rear outer plate 15 has a bottom surface 15d joined to the lower plate 12 and a front lower inclined surface 15fd that extends diagonally upward from the front end of the bottom surface 15d and is spaced from the lower plate 12. The third rear outer plate 17 has a bottom surface 17d joined to the lower plate 12 and a front lower inclined surface 17fd that extends diagonally upward from the front end of the bottom surface 17d and is spaced from the lower plate 12. Therefore, when a bending load is applied to the box support frame 10, it is possible to avoid stress concentration in the front lower part of the first rear outer plate 15 and the third rear outer plate 17. With this embodiment, there is no need to add reinforcing members to deal with such stress concentrations, which further reduces weight increase.

Although one embodiment of the present invention has been described above, the above embodiment is merely an example. Many other embodiments are possible.

In the above embodiment, the first to third rear outer panels 15 to 17 of the box support frame 10 are formed with holes 15h to 17h into which shafts that rotatably support the hooks are inserted, but if shafts are not required, those holes 15h to 17h may be omitted.

In the above embodiment, the cargo box support frame 10 has other outer plates (first to third rear outer plates 15 to 17) separate from the front outer plate 14, but the front outer plate 14 may be extended rearward and the other outer plates may be omitted. As with the front part of the front outer plate 14, a notch 14c (see Figure 3) may be formed in the rear part of the front outer plate 14 to ensure space 20 for fastening the bolt 22.

The cross-sectional shapes of the inner plate 13 and the front outer plate 14 are not particularly limited. The cross-sectional shapes of the inner plate 13 and the front outer plate 14 may be flat, L-shaped, or U-shaped. The cross-sectional shapes of the first to third rear outer plates 15 to 17 are also not limited in any way.

In the above embodiment, the second rear outer plate 16 has four corners with corners, but at least one of the four corners of the second rear outer plate 16 may be formed in a cut shape. At least one of the four corners of the first rear outer plate 15 may have a corner. At least one of the four corners of the third rear outer plate 17 may have a corner.

In the above embodiment, the box support frame 10 has multiple vertical plates joined to the upper plate 11 and the lower plate 12, but there may be only one vertical plate.

REFERENCE SIGNS LIST 1 Refuse collection vehicle 3 Cargo box 3b Refuse inlet 4 Chassis frame 6 Bar-type load cell 10 Cargo box support frame 11 Upper plate 12 Lower plate 12h Bolt hole 13 Inner plate 14 Front outer plate 15 First rear outer plate 16 Second rear outer plate 17 Third rear outer plate 22 Bolt

Claims (5)

A chassis frame extending in a front-rear direction of the vehicle;
bar-type load cells provided at the front and rear of the chassis frame;
A cargo box support frame extending in the front-rear direction of the vehicle and supported by the bar-type load cell;
A garbage inlet is formed, and a garbage box is supported by the garbage box support frame.
The packing box support frame is
An upper plate extending in the front-rear and left-right directions of the vehicle;
A lower plate located below the upper plate and extending in the vehicle front-rear direction and left-right direction;
one or more vertical plates joined to the upper plate and the lower plate and extending in the vehicle front-rear direction and up-down direction;
The thickness of the upper plate is greater than the thickness of the vertical plate, and the thickness of the lower plate is greater than the thickness of the vertical plate,
The vertical plate is
An inner plate,
A front outer plate arranged on the outer side of the inner plate in the vehicle width direction;
a rear outer plate disposed at a position spaced rearward from the front outer plate and disposed outward in a vehicle width direction of the inner plate;
A garbage collection truck, wherein a bolt hole into which a bolt is inserted for fixing the cargo box support frame to the bar-type load cell is formed at the rear of the front outer plate and in front of the rear outer plate of the lower plate . The refuse collection vehicle according to claim 1, wherein the thickness of the upper plate is greater than twice the thickness of the vertical plate, and the thickness of the lower plate is greater than twice the thickness of the vertical plate. The refuse collection vehicle according to claim 1 or 2, in which the vertical dimension at the rear end of the box support frame is 1 to 1.3 times the horizontal dimension. The inner plate is formed in a flat plate shape,
The refuse collection vehicle according to any one of claims 1 to 3 , wherein the front outer plate is formed in a U-shaped cross section. A garbage collection vehicle according to any one of claims 1 to 4 , wherein the rear outer panel has a bottom surface joined to the lower panel, and a slope extending diagonally upward and forward from a front end of the bottom surface and spaced apart from the lower panel.

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