Garbage collection vehicle

Abstract

To provide a garbage collection vehicle that can suppress changes in the amount ot protrusion of a guide roller guiding the vertical movement of a cover member after adjusting the amount of protrusion outward in the direction of a wheel.SOLUTION: A garbage collection vehicle 1 includes: a cover member 20 that opens and closes an inlet 3a of a garbage input box 3; a fixed part 41 that is fixed to the cover member 20 and has a female screw 44a along a screw axis C in the vehicle width direction; a supporting shaft 45 that has a male screw part 45c which is screwed into the female screw 44a of the fixed part 41; and a guide roller 46 that is rotatably provided at the outer end of the supporting shaft 45 in the vehicle width direction. By adjusting the tightening amount of the male screw part 45c, the protrusion amount of the guide roller 46 to the outside in the vehicle width direction is adjustable. The supporting shaft 45 and the fixed part 41 form a stop structure 60.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a refuse collection vehicle. [Background technology]

[0002] For example, the garbage collection vehicle described in Patent Document 1 is equipped with a cover member that opens and closes the opening of a garbage bin. Guide rollers are rotatably mounted via support shafts on both sides of the cover member in the vehicle width direction. These guide rollers move up and down along rail members mounted on both sides of the garbage bin in the vehicle width direction. As a result, the cover member slides up and down relative to the garbage bin to open and close the opening.

[0003] The support shaft that supports the guide roller is attached to the cover member so as to be movable in the vehicle width direction. The guide roller is rotatably supported on the outer end of the support shaft in the vehicle width direction, and a nut is fastened to the inner end of the support shaft in the vehicle width direction. By adjusting the amount that the nut is fastened to the support shaft, the guide roller moves in the vehicle width direction together with the support shaft relative to the cover member, and the amount that the guide roller protrudes outward in the vehicle width direction can be adjusted (see Figure 5 of Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5079636 Summary of the Invention [Problem to be solved by the invention]

[0005] In the refuse collection vehicle of Patent Document 1, the tightening amount of the nuts may change due to vibrations while the vehicle is traveling. In this case, if the tightening amount of the nuts is too large, the guide rollers will protrude excessively outward in the vehicle width direction. If the guide rollers protrude excessively, the end faces of the support shafts and the sides of the guide rollers will move up and down while being strongly pressed against the rail members, which may cause the guide rollers to wear and be damaged. Furthermore, if the tightening amount of the nuts is too small, the guide rollers will not protrude enough outward in the vehicle width direction. If the guide rollers do not protrude enough, they may separate from the rail members, making it impossible to move the cover member up and down.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a garbage collection vehicle in which the amount of tightening of the nuts on the guide rollers that guide the up and down movement of the cover member does not change even if vibrations occur while the garbage collection vehicle is running. [Means for solving the problem]

[0007] an anti-rotation portion formed by the support shaft and the fixed portion; a guide roller rotatably mounted on the outer end of the support shaft in the vehicle width direction; a guide roller mounted on the outer end of the support shaft in the vehicle width direction; and a rail member mounted on the garbage dump box and guiding the guide roller so that it can move up and down in an up-and-down direction.

[0008] In this embodiment of the garbage collection vehicle, the support shaft and the fixed portion form a rotation prevention portion, and by having this rotation prevention portion, even if vibrations occur in the garbage collection vehicle, the support shaft is prevented from rotating due to vibrations, and loosening is prevented.

[0009] In this embodiment, the support shaft of the refuse collection vehicle has a circumferential portion and a male thread portion in the longitudinal direction.

[0010] This embodiment is a garbage collection vehicle in which the male thread portion is provided with a rotation stopper.

[0011] According to this embodiment, the garbage collection vehicle has an anti-rotation shape on the male screw portion, so simply changing the shape of the male screw portion has the effect of preventing the support shaft from rotating, eliminating the need for a large device and expected to reduce costs.

[0012] In this embodiment, the refuse collection vehicle preferably has the rotation stopper shape having at least two angular corners.

[0013] According to this embodiment, the anti-rotation shape of the garbage collection vehicle is an angular shape in at least two places, so the force that tries to rotate the support shaft due to vibration can be absorbed by the angular shapes in two places, and the support shaft can be prevented from rotating against that force.

[0014] In this embodiment, it is more preferable for the garbage collection vehicle to have four anti-rotation shapes, which are four corners arranged at positions 90 degrees out of phase with each other in the circumferential direction on the cross section of the support shaft.

[0015] According to this embodiment, there are four anti-rotation shapes, which are four corners arranged at positions 90 degrees out of phase with each other in the circumferential direction on the cross section of the support shaft. This ensures that the force caused by vibration is dispersed, and each of the four corners can withstand the force that tries to rotate the support shaft. Even if a force is applied, the four corners can resist that force, ensuring that the support shaft is prevented from rotating. [Effects of the Invention]

[0016] The refuse collection vehicle of the present invention can suppress rotation due to vibrations even if the guide rollers that guide the up and down movement of the cover member are subjected to vibrations. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a side view showing the rear of a refuse collection vehicle according to an embodiment of the present invention. [Figure 2] This is a front view of the garbage bin seen from the rear of the vehicle. [Figure 3] FIG. [Figure 4] FIG. 10 is a front view of the support mechanism as seen from the front side of the cover member. [Figure 5] 1(a) is a front view of the support shaft, and FIG. 1(b) is a view taken along the arrow II in FIG. [Figure 6] 1A and 1B are diagrams showing a male thread portion of a support shaft according to an embodiment of the present invention, in which (a) is a perspective view and (b) is a cross-sectional view. [Figure 7] FIG. 2 is a perspective view of a fixing plate according to an embodiment of the present invention. [Figure 8] 10 is a perspective view of the anti-rotation portion according to the embodiment of the present invention, showing a state in which a support shaft is inserted into a through hole in a fixed plate. FIG. [Figure 9] 10A and 10B are views of a male thread portion of a support shaft according to another embodiment of the present invention, in which (a) is a perspective view and (b) is a cross-sectional view. [Figure 10] 10A and 10B are views of a male thread portion of a support shaft according to another embodiment of the present invention, in which (a) is a perspective view and (b) is a cross-sectional view. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of the present invention will be described. (Overall composition) Figure 1 is a side cross-sectional view showing the rear of a refuse collection vehicle 1 according to an embodiment of the present invention. In Figure 1, the refuse collection vehicle 1 is equipped with a refuse collection box 2 mounted on the vehicle body, and a refuse drop box 3 arranged behind the refuse collection box 2. An opening is formed at the rear end of the refuse collection box 2 for loading refuse into the refuse collection box 2. The refuse drop box 3 has an opening 3a at its rear through which the refuse is dropped.

[0019] The garbage drop box 3 can rotate vertically relative to the garbage collection box 2, centering on a fulcrum provided at the top of the garbage drop box 3. This allows the garbage drop box 3 to open and close relative to the garbage collection box 2. That is, when the garbage drop box 3 is rotated downward as shown in FIG. 1, it closes the opening of the garbage collection box 2, and when it is rotated upward (not shown), it opens the opening and is in a state where the garbage inside the garbage collection box 2 can be discharged.

[0020] The garbage collection vehicle 1 is equipped with a loading device T installed inside the garbage bin 3. The loading device T can load garbage that has been thrown into the garbage bin 3 through the throw-in port 3a into the garbage storage box 2. The loading device T of this embodiment is a press type that includes a compression process in the garbage loading operation. The loading device T has a slider 5 and a push plate 7 that is rotatably attached to the lower end of the slider 5 via a pin 6. The slider 5 is movable along guide rails (not shown) that are attached to the left and right side walls 3c of the garbage bin 3. Push cylinders 8 are attached on both the left and right sides of the garbage bin 3, between the side members 5a of the slider 5 and the side walls 3c of the garbage bin 3. Press cylinders 9 are attached between the side members 7a of the push plate 7 and the side members 5a of the slider 5.

[0021] The loading device T operates as follows. First, from the state shown by the solid lines in FIG. 1, the press cylinder 9 contracts, causing the push plate 7 to rotate counterclockwise and reverse (reverse process). Next, the push cylinder 8 contracts, causing the push plate 7 to descend diagonally backward together with the slider 5, compressing the garbage introduced through the inlet 3a with the push plate 7 (primary compression process). Then, the press cylinder 9 expands, causing the push plate 7 to rotate clockwise, performing a secondary compression of the garbage (secondary compression process).

[0022] FIG. 2 is a front view of the garbage bin 3 as seen from the rear of the vehicle. In FIGS. 1 and 2, the garbage bin 3 has a loading platform 10 provided below the loading port 3a. When the push cylinder 8 is extended, the loading platform 10 moves the slider 5 and the pusher plate 7 diagonally forward to the garbage loading port, reaching the state shown in FIG. 1, and pushes the secondarily compressed garbage into the garbage storage box 2 (pushing process). In this way, the loading device T performs the inversion process, primary compression process, secondary compression process, and pushing process in this order as one cycle, and can load the garbage that has been placed in the garbage bin 3 into the garbage storage box 2.

[0023] When the platform 10 is in the unfolded position, the worker can temporarily place the trash on the platform 10 when depositing trash through the loading port 3a, improving the workability of depositing trash. The platform 10 is formed over the entire length of the loading port 3a in the vehicle width direction, and when it is in the upright position, it closes the bottom of the loading port 3a.

[0024] In Figures 1 and 2, the garbage collection vehicle 1 is equipped with a cover member 20 for opening and closing the opening 3a of the garbage bin 3, a rail member 30 provided on the garbage bin 3, and a support mechanism 40 for supporting the cover member 20 so that it can slide up and down along the rail member 30.

[0025] The cover member 20 is formed over the entire length of the insertion opening 3a in the vehicle width direction, and opens and closes the rest of the insertion opening 3a except for the lower part, that is, the part of the insertion opening 3a above the platform 10 when the insertion opening 3a is in the upright position. A handle 11 is provided at the lower end of the rear surface of the cover member 20 for sliding the cover member 20 up and down.

[0026] The rail members 30 are provided on the side walls 3c of the garbage bin 3, extending in the vertical direction along the side edges of the drop opening 3a in the vehicle width direction. Although not shown, the rail members 30 are provided on the left and right side walls 3c of the garbage bin 3, along both side edges of the drop opening 3a in the vehicle width direction.

[0027] Fig. 3 is a side view of the garbage bin 3. As shown in Fig. 3, when the mounting table 10 is in an upright position, the cover member 20 is slidable between an upper position (the position indicated by the two-dot chain line in Fig. 3) and a lower position (the position indicated by the two-dot chain line in Fig. 3). The cover member 20 of this embodiment is an outer type that is positioned above the top plate 3b of the garbage bin 3 in the upper position.

[0028] As shown by the solid line in Fig. 3, the cover member 20 slid to the lower position and the mounting base 10 in the upright position are arranged successively one above the other, thereby closing the entire insertion port 3a. Then, from this closed state, as shown by the two-dot chain line in Fig. 3, the cover member 20 is slid to the upper position and the mounting base 10 is set to the unfolded position (see Fig. 1), thereby opening the entire insertion port 3a.

[0029] The lower end of an arm member 32 is connected to the front end of the outer surface of the side wall 3c via a bracket 31 fixed to approximately the center in the vertical direction so as to be vertically slidable and vertically rotatable. The upper end of the arm member 32 is connected to the upper end of the cover member 20. As a result, when the cover member 20 slides up and down, the upper end of the arm member 32 rotates up and down around the lower end while the lower end of the arm member 32 moves up and down.

[0030] One end of an auxiliary member 33, such as a spring, is connected to the lower end of the arm member 32, and the other end of the auxiliary member 33 is connected to the upper end of the outer surface of the side wall 3c. As a result, the auxiliary member 33 constantly urges the arm member 32 to rotate upward. Therefore, the urging force of the auxiliary member 33 constantly urges the cover member 20 to slide upward between the upper and lower positions.

[0031] Both ends of the auxiliary member 33 are connected to the arm member 32 and the side wall 3c, respectively, so that the biasing force is greatest when the cover member 20 is in the lower position and is least when the cover member 20 is in the upper position. The cover member 20 is locked in the lower position by a locking mechanism (not shown). Although not shown, the bracket 31, arm member 32, and auxiliary member 33 are provided on the left and right side walls 3c of the trash bin 3, respectively.

[0032] [Support mechanism] Fig. 4 is a front view of the support mechanism 40 as seen from the front surface 21 side of the cover member 20. In Fig. 4, the support mechanisms 40 are provided on both sides in the vehicle width direction on the front surface 21 of the cover member 20. The support mechanism 40 includes a fixing portion 41 fixed to the cover member 20, a support shaft 45 supported by the fixing portion 41, and a guide roller 46 and a nut 47 attached to the support shaft 45.

[0033] The fixing portion 41 has a pair of fixing plates 42, 43 and nuts 44, 47. The pair of fixing plates 42, 43 are arranged on the vehicle width direction outer sides of the front surface 21 of the cover member 20 so that one side surface 42a, 43a of each plate faces each other with a gap in the vehicle width direction. Each fixing plate 42, 43 is fixed to the front surface 21 of the cover member 20 by welding or the like. Each fixing plate 42, 43 has a through hole 42c, 43c formed therethrough in the plate thickness direction. Each through hole 42c, 43c is formed to have a size that allows a male thread portion 45c (described later) of the support shaft 45 to be inserted therein.

[0034] A nut 44 is fixed by a male thread portion 45c to the other side surface 43b of the fixing plate 43, which is disposed on the inner side in the vehicle width direction, at a position corresponding to the through hole 43c. The nut 44 has a female thread 44a on its inner periphery. The thread axis C of the female thread 44a extends along the vehicle width direction.

[0035] Fig. 5(a) is a front view of the support shaft 45. Fig. 5(b) is a view taken along arrow II in Fig. 4 and Fig. 5(a). In Fig. 4, Fig. 5(a), and Fig. 5(b), the support shaft 45 is a member whose axis X is disposed along the vehicle width direction. On the outer periphery of the support shaft 45, a first circumferential surface 45a, a second circumferential surface 45b, a male thread portion 45c, and a locking surface 45d are formed in this order from the outer side in the vehicle width direction (one axial side) to the inner side in the vehicle width direction (the other axial side).

[0036] 6, support shaft 45 is provided with anti-rotation shapes 62 in the longitudinal direction at locations where male threaded portion 45c is present. These anti-rotation shapes are formed by providing corners 64 on support shaft 45. Furthermore, on the cross section of support shaft 45, four corners 64 are arranged at positions spaced 90 degrees apart from each other.

[0037] The circumferential portion has a first circumferential surface 45a and a second circumferential surface 45b. The first circumferential surface 45a protrudes outward in the vehicle width direction beyond the cover member 20 and is inserted into the rail member 30. A guide roller 46 is attached to the first circumferential surface 45a so as to be rotatable about the axis X. As a result, the guide roller 46 is rotatably supported at the outer end of the support shaft 45 in the vehicle width direction.

[0038] The guide rollers 46 are arranged so that their outer peripheral surfaces roll in the vertical direction while contacting the guide surfaces 30a extending in the vertical direction of the rail member 30. The guide rollers 46 are guided so as to be movable in the vertical direction along the guide surfaces 30a of the rail member 30, so that the cover member 20 slides in the vertical direction along the rail member 30.

[0039] The second circumferential surface 45b is the portion of the support shaft 45 that has the largest outer diameter, and is formed shorter in the vehicle width direction (axial direction) than the first circumferential surface 45a. An annular stepped surface 45e against which the guide roller 46 abuts is formed between the first circumferential surface 45a and the second circumferential surface 45b. This stepped surface 45e restricts the movement of the guide roller 46 inward in the vehicle width direction.

[0040] The male thread portion 45c is formed to be longer in the vehicle width direction than the first circumferential surface 45a. The male thread portion 45c is inserted into the through holes 42c, 43c of the pair of fixing plates 42, 43 from the outer side of the fixing portion 41 in the vehicle width direction, and is fastened to the female thread 44a of the nut 44. As a result, while being supported by the fixing portion 41, the support shaft 45 rotatably supports the guide roller 46 on the first circumferential surface 45a, which extends outward in the vehicle width direction than the female thread 44a.

[0041] Fig. 7 shows the fixing plates 42, 43. In this embodiment, the through holes 42c, 43c of the fixing plates 42, 43 have a shape that matches the cross-sectional shape of the male thread portion 45c of the support shaft 45, allowing the male thread portion 45c to be inserted. Fig. 8 is a perspective view of the fixing plates 42, 43 with the support shaft 45 inserted. At this time, the cross-sectional shapes of the through holes 42c, 43c and the male thread portion 45c of the support shaft 45 match, so the support shaft 45 inserted into the through holes 42c, 43c will not rotate. Therefore, the male threaded portion 45c of the support shaft 45 rotates in the opposite direction to the direction in which the male threaded portion 45c of the support shaft 45 is tightened at the fixed portion 41, preventing the nuts 44, 47 from loosening, and the support shaft 45 and the fixed portion 41 function as a rotation stopper.

[0042] The nut 47 is tightened onto the male thread portion 45c on a position in the vehicle width direction outside the fixing plate 42, which is disposed on the outer side in the vehicle width direction. After adjusting the tightening amount of the male thread portion 45c as described below, the nut 47 is tightened until it abuts against the other side surface 42b of the fixing plate 42 via the washer 48. This makes it possible to reduce changes in the tightening amount of the support shaft 45 relative to the nut 44.

[0043] The amount of protrusion of the guide roller 46 outward in the vehicle width direction is adjusted so that the outer peripheral surface of the guide roller 46 contacts the guide surface 30a of the rail member 30, while the outer end surface 45f of the support shaft 45 in the vehicle width direction does not abut against the non-guide surface 30b of the rail member 30. The non-guide surface 30b is positioned further outward in the vehicle width direction than the guide roller 46, and is a surface with which the outer peripheral surface of the guide roller 46 does not come into contact.

[0044] (Configuration of anti-rotation part) In Figure 4, the garbage collection vehicle 1 is equipped with a rotation prevention portion 60 that prevents the support shaft 45 of the support mechanism 40 from rotating around the thread axis C (axis X). The rotation prevention portion 60 is made up of the support shaft 45 and the fixed portion 41. The support shaft 45 has the first circumferential surface 45a, the second circumferential surface 45b, and the male thread portion 45c in its longitudinal direction. The male thread portion 45c is provided with a rotation prevention shape 62. In this embodiment, corners 64 are provided on the support shaft 45. Furthermore, four corners 64 are arranged at positions 90 degrees apart on the cross section of the support shaft 45. The four corners 64 are threaded. As shown in Figures 7 and 8, the cross-sectional shapes of the through holes 42c, 43c, through which the support shaft 45 is inserted in the fixed plates 42, 43, which are the rotation-preventing portions of the fixed portion 41, match the cross-sectional shape of the support shaft 45, and when the support shaft 45 is inserted into the through holes 42c, 43c, the four corners 64 prevent the support shaft 45 from rotating.

[0045] A male thread portion 45c is formed in the axial direction of the support shaft 45, extending at least from the nut 47 attachment portion to the nut 44 attachment portion. As shown in Figure 6, the male thread portion 45c has four corners 64. Therefore, when nuts 44 and 47 are fastened to the male thread portion 45c, even if vibrations are applied to the nuts 44 and 47 due to vibrations of the garbage collection truck 1, the nuts are unlikely to rotate in the reverse direction, and the nuts 44 and 47 will not loosen, thereby preventing the support shaft 45 from rotating.

[0046] (Procedure for creating anti-rotation part) (1) The holes for inserting the support shafts 45 of the fixing plates 42 and 43 of the fixing portion 41 are cut out in the shape shown in FIG. (2) The threads of the male thread portion 45c of the support shaft 45 are cut along the longitudinal direction of the support shaft 45 so that the cross section has corners, and flat surfaces are created to create four corners. (3) With the amount of protrusion of the guide roller 46 outward in the vehicle width direction adjusted so that the guide roller 46 is guided by the rail member 30 previously installed at the feed opening 3a, the longitudinal position of the support shaft 45 is adjusted and the support shaft 45 is inserted into the through holes 42c, 43c of the fixing plates 42, 43 along the screw axis C of the support shaft 45. (4) The support shaft 45 is fixed by fastening the nuts 44 and 47 to the fixing plates 42 and 43 from both sides.

[0047] (Effects of this embodiment) In the anti-rotation portion 60 of this embodiment, the tightening amount of the male thread portion 45c of the support shaft 45 supporting the guide roller 46 relative to the female thread 44a of the nut 44 is adjusted, and in a state where the amount of protrusion of the guide roller 46 outward in the vehicle width direction is adjusted, the nut 44 is tightened onto the support shaft 45, and then the nut 47 is tightened and fixed with the fixing plate 42 sandwiched between them. Here, the male thread portion 45c of the support shaft 45 has four corners, which prevents the support shaft 45 from rotating, preventing the nuts 44 and 47 from loosening. Therefore, after adjusting the amount of protrusion of the guide roller 46 outward in the vehicle width direction, it is possible to prevent the amount of protrusion from changing.

[0048] (Other Examples) The anti-rotation shape may be a notch, a protrusion, or a groove in addition to a corner. Two corners may be formed by cutting a portion along the longitudinal direction of the male thread portion 45c. For example, two corners may be formed at the top and bottom, two corners on the left and right, or two corners on a diagonal line when viewed from a cross section of the short side of the male thread portion 45c. While the top and bottom surfaces of the male thread portion 45c are curved in this embodiment, the top and bottom surfaces may be flat, and the cross section may be rectangular. Furthermore, a protrusion may be formed along the longitudinal direction of the male thread portion 45c. Alternatively, a groove may be formed along the longitudinal direction of the male thread portion 45c.

[0049] As shown in Figure 9, when a protrusion 70 is provided along the longitudinal direction of the male thread portion 45c, a groove corresponding to the protrusion 70 is created in the through holes 42c, 43c of the fixing plates 42, 43 so that the protrusion 70 and the groove fit together. Conversely, as shown in Figure 10, if a groove 74 is provided along the longitudinal direction of the male thread portion 45c, a protrusion is provided in the through holes 42c, 43c of the fixing plates 42, 43 so that the groove 74 and the protrusion fit together. By doing so, the rotation of the male screw portion 45c is restricted by the grooves or protrusions of the through holes 42c, 43c of the fixing plates 42, 43, and the male screw portion 45c does not rotate, and the support shaft 45 is prevented from rotating.

[0050] (others) The garbage collection vehicle 1 of this embodiment is equipped with a press-type loading device T, but may also be equipped with a rotary plate-type loading device that loads garbage using a rotary plate and a push plate. The cover member 20 of this embodiment is an outer type, but may also be an inner type that is positioned below the top plate 3b of the garbage bin 3 in the upper position. [Explanation of symbols]

[0051] 1. Refuse collection truck 2. Garbage collection box 3 Garbage disposal box 3a Inlet 20 Cover member 30 Rail member 40 Support mechanism 41 Fixed part 44a female thread 45 Support shaft 45c male thread 46 Guide roller 60 Anti-rotation part C Screw axis T loading device

Claims

1. A garbage collection box, a trash container disposed behind the trash collection container and having an inlet at the rear for trash to be thrown into; a loading device capable of loading the garbage into the garbage storage box by compressing or rotating the garbage that has been thrown into the garbage throwing box from the throwing inlet; a slide cover that opens and closes the insertion port and has a rotation-stopping portion; a fixing portion having a female thread and fixed to the slide cover with the thread axis of the female thread aligned in the vehicle width direction; a support shaft having a male threaded portion that is fastened to the female thread of the fixing portion and that extends outward in the vehicle width direction than the female thread; a guide roller rotatably provided at an outer end of the support shaft in the vehicle width direction; a rail member provided in the trash bin to guide the guide roller so as to be movable in the up and down direction; A garbage collection vehicle characterized in that the support shaft and the fixed portion form a rotation prevention portion.

2. 2. The garbage collection vehicle according to claim 1, wherein the support shaft has a circumferential portion and a male thread portion in the longitudinal direction.

3. 3. The garbage collection vehicle according to claim 2, wherein the male thread portion is provided with a rotation stopper.

4. 4. A garbage collection vehicle according to claim 3, wherein the rotation stopper has at least two angular portions.

5. The garbage collection vehicle described in claim 4, characterized in that there are four anti-rotation shapes, which are four corners arranged at positions 90 degrees out of phase with each other circumferentially on the cross section of the support shaft.

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