JP2012240779A - Garbage input box of refuse collecting vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the degree of freedom of design and to achieve cost reduction in a garbage input box provided with a storage-type rear door.SOLUTION: The garbage input box 1 connected to the back of a garbage storage box in a freely openable/closable manner includes a rear door 10 that is guided to move along a guide rail 6 having a curved part between the two positions, a down position where a garbage input port 7 opened in the lower part of the rear is closed and an up position where the garbage input port 7 is opened, and a driving mechanism S that moves the rear door 10 between the two positions. When the rear door 10 has moved to the up position, the rear door 10 is arranged inside an upper cover 5. The rear door 10 has a plurality of divided doors 11 that are connected to each other in the moving direction and is composed connecting the adjacent divided doors 11 and 11 in a manner that they can be relatively rotated with each other.

Description

  The present invention relates to an improvement of a dust input box of a garbage truck.

  The garbage collection vehicle includes a vehicle body, a dust storage box mounted on the vehicle body, in which a dust storage space is defined, a dust input box connected to the rear of the dust storage box in an openable / closable manner, and a dust input box. And a dust loading device installed therein, and configured to load and store the dust thrown into the dust throwing box into the dust storage box by the dust loading device.

  A dust inlet is provided in the lower part of the rear surface of the dust inlet box to allow dust to enter the dust inlet box, and this dust inlet is provided so that it can reciprocate between two positions: a lowered position and a raised position. The closed rear door is closed or opened. The rear door of the dust input box has a type (for example, Patent Document 1) arranged outside the rear surface of the dust input box when the dust door is moved to the raised position to open the dust input port, and the rear surface of the dust input box. It is roughly divided into storage types (for example, Patent Documents 2 and 3) arranged (stored) on the inside, and is selected and used as appropriate. Recently, a retractable rear door tends to be used frequently because it can be effectively used as a mounting portion of the member. The retractable rear door has guides (guide rollers) at both ends in the vehicle width direction, and the guide rollers guide and move along a guide rail having a curved portion laid inside the side wall of the dust bin. By doing so, it is configured to slide between the two positions.

JP 2006-206306 A Japanese Patent No. 4637780 JP 2010-228850 A

  By the way, the various specifications of the dust box are often different depending on the user, and this is one of the factors that hinder the sharing of the components and members and hence the cost reduction of the garbage truck. In particular, in a conventional dust bin with a retractable rear door, the rear door is composed of a single plate-like member, and in this case, it constitutes a dust bin such as a guide rail or upper cover. Since other members need to be specially designed according to the shape (cross-sectional shape) of the rear door, the cost is inevitably increased.

  In view of such circumstances, the main problem of the present invention is that it is possible to increase the degree of design freedom in a dust bin with a retractable rear door, thereby reducing the cost of the dust bin. It is in.

  The present invention devised to solve the above-mentioned problems is a dust input box of a dust collection vehicle that is openably and closably connected to a rear part of a dust storage box mounted on a vehicle body, and is provided with a dust input opened on a rear surface. A rear door that is guided and moved along a guide rail having a curved portion at least partially between a lower position that closes the mouth and a raised position that opens the dust inlet, and the rear door between the two positions. Driving means for moving the rear door, and when the rear door is moved to the raised position, the rear door is arranged on the inner side of the rear side of the garbage throwing box. And having adjacent divided doors connected so as to be relatively rotatable.

  As described above, if the rear door has a plurality of divided doors connected in the moving direction and the adjacent divided doors are connected so as to be relatively rotatable, the rear door can be arbitrarily deformed. Therefore, even when the shape of the guide rail or the upper cover is changed, the rear door can be smoothly moved up and down while being deformed along the shape of the guide rail. Therefore, it is possible to increase the degree of freedom in designing other components such as the guide rail and the upper cover, and it is not necessary to specially design these members according to the shape (cross-sectional shape) of the rear door. Accordingly, various components can be shared, and the degree of freedom of combination of the components can be increased, thereby reducing the cost of the dust box.

  In addition, if the rear door is composed of a plurality of divided doors connected so as to be relatively rotatable, even if a part of the rear door is greatly deformed, repair can be performed by replacing the divided door with this deformation. Can be completed. Therefore, compared with the conventional structure which comprised the rear door with the panel-like member of 1 sheet, there also exists an advantage that the effort and expense which are required for the maintenance of a rear door can be reduced.

  By the way, the garbage throwing box described in the above-mentioned Patent Document 3 has a drive mechanism (automatic door open / close) for automatically moving the rear door between two positions of the lowered position and the raised position, that is, automatically opening and closing the rear door. The drive mechanism is configured by disposing functional parts such as a door opening / closing arm and a hydraulic cylinder inside both side plates of the dust box. However, in such a configuration, functional parts that move the rear door up and down, such as an open / close arm and a hydraulic cylinder, easily interfere with the dust thrown into the dust box, and therefore the opening / closing function of the rear door is likely to be impaired. There is a problem.

  Therefore, the drive mechanism for the rear door provided in the dust box according to the present invention is a telescopic mechanism that can be stretched between a shortened state in which the rear door is positioned in the raised position and an extended state in which the rear door is positioned in the lowered position. The one end and the other end of the telescopic mechanism are rotatably connected to the center portion in the vehicle width direction of the ceiling surface of the dust box and the center portion in the vehicle width direction of the rear door, respectively. That is, in this invention, the expansion-contraction mechanism which is a functional component for raising / lowering the rear door was arrange | positioned in the upper center in a garbage throwing box. This makes it difficult for the dust thrown into the dust throwing box to interfere with the expansion / contraction mechanism, so that the situation that the opening / closing function of the rear door is impaired is less likely to occur, and the reliability of the dust throwing box is improved. improves.

  In the above configuration, the expansion / contraction mechanism itself can be configured by a hydraulic cylinder. However, the expansion / contraction stroke of the expansion / contraction mechanism is proportional to the amount of back-and-forth movement of the rear door. In the case where the opening size of the insertion port (opening size in the vertical direction of the vehicle body) is set large, the amount of movement of the rear door is increased, resulting in an increase in the size of the hydraulic cylinder and the cost of the drive mechanism. Therefore, in the present invention, the expansion / contraction mechanism is configured by a pantograph-type link mechanism in which a plurality of link members are connected so as to be relatively rotatable. In this way, it is possible to ensure the necessary expansion / contraction stroke (the amount of up-and-down movement of the rear door) while making the expansion / contraction mechanism and thus the drive mechanism compact. In this case, the drive mechanism may include the above-described link mechanism and a hydraulic cylinder that expands and contracts the link mechanism.

  The arrangement | positioning aspect of a hydraulic cylinder can be set arbitrarily. For example, the hydraulic cylinder may be arranged such that its expansion / contraction direction is parallel to the expansion / contraction direction of the link mechanism (see FIGS. 5 and 6), and is inclined with respect to the expansion / contraction direction of the link mechanism. You may arrange | position (refer FIG. 7).

  The configuration of the present invention described above can be adopted regardless of whether the dust loading device installed inside the dust throwing box is a so-called rotary type or a press type.

  As described above, according to the present invention, it is possible to increase the degree of design freedom in a garbage throwing box provided with a retractable rear door. Thereby, the cost reduction of this refuse input box can be aimed at.

It is a schematic left view of the dust box concerning one embodiment of the present invention, and is a figure showing the state where the rear door was located in the lowered position. It is a schematic left view of the dust box concerning one embodiment of the present invention, and is a figure showing the state where the rear door was located in the raised position. It is a rear view of the refuse input box which concerns on one Embodiment of this invention. (A) A figure is an AA arrow directional view in FIG. 3, (b) A figure is a BB arrow directional view in FIG. It is a figure which shows the shortened state of the drive mechanism which moves a rear door between two positions, (a) A figure is a side view of the drive mechanism, (b) The figure is a top view of the drive mechanism. It is a figure which shows the expansion | extension state of the drive mechanism which moves a rear door between two positions, (a) A figure is a side view of the drive mechanism, (b) A figure is a top view of the drive mechanism. It is a figure which shows the expansion | extension state of the drive mechanism which concerns on other embodiment, (a) A figure is a side view of the drive mechanism, (b) The figure is a top view of the drive mechanism.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a schematic left side view of a dust bin 1 according to an embodiment of the present invention, and FIG. 3 shows a rear view of the dust bin 1. 1 and 3 show a state where the dust inlet 7 opened at the lower rear portion of the dust inlet box 1 is closed by the rear door 10, and FIG. 2 shows a state where the dust inlet 7 is opened. Is shown.

  This dust input box 1 is openably and closably connected to a rear portion of a dust storage box (not shown) mounted on the body of the dust collection vehicle, and includes a pair of left and right side plates 2, a bottom plate 3, a top plate 4 and an upper portion. The internal space defined by the cover 5 is equipped with a dust loading device (not shown) for loading the charged dust into the dust storage box. As the dust loading device, for example, a swingable push plate and a rotary or liftable packer plate mainly composed of a rotatable rotary plate located below the push plate, and this A press type is adopted in which the main part is a press plate that is swingably provided at the lower end of the packer plate. Each component of the dust loading device is hydraulically driven, and a hydraulic pump for supplying hydraulic oil (pressure oil) to the actuator for driving the dust loading device is abbreviated as a power take-out device (PTO) (not shown). In this case, the power of the traveling engine of the garbage truck is taken out, and the pump driving motor is driven by this taken out power.

  The rear door 10 is laid on the inner side of the side plates 2 and 2 between a lowered position for closing the dust inlet 7 shown in FIG. 1 and a raised position for opening the dust inlet 7 shown in FIG. A sliding door that is guided and moved along the guide rails 6 and 6, and more specifically, an electric drive (electrical opening and closing) that moves up and down when a drive mechanism S provided near the ceiling surface of the dust box 1 is operated. It is a sliding door of the type. The rear door 10 is stored inside the upper cover 5 when moved to the raised position. The rear door 10 includes a plurality of divided doors 11 (three in the present embodiment, hereinafter referred to as the first embodiment) from the upper side to the lower side. A connecting shaft 13 extending in the vehicle width direction (FIG. 4 (a)) is also provided, in which the divided doors 11 and 11 adjacent to each other in the vertical direction are arranged inside the rear door 10. In addition, reference is made so that relative rotation is possible. Each guide rail 6 has a curved portion at one or a plurality of locations (two locations in the present embodiment) in the longitudinal direction, and is supported by a bracket (not shown) attached to the inner wall surface of the adjacent side plate 2. ing.

  As shown in FIG. 4A, a guide roller 12 for guiding and moving the rear door 10 (divided doors 11A to 11C) along the guide rail 6 is rotatable at one end and the other end of the connecting shaft 13. It is attached. The guide rollers 12 are also provided at both ends in the vehicle width direction at the upper part of the first divided door 11A and at both ends in the vehicle width direction at the lower part of the third divided door 11C. However, in the present embodiment, the guide rollers 12 provided at both ends in the vehicle width direction at the lower part of the third divided door 11C have through-holes opened at both end surfaces as shown in FIG. One end of a rod 16 disposed inside the third divided door 11C is inserted through the inner periphery of the through hole. The rod 16 is a so-called latch lock component that is provided at one end and the other end of the third divided door 11C in the vehicle width direction.

  Each latch lock has a locking / unlocking lever, and moves forward and backward in the vehicle width direction in conjunction with the handle 15 attached to the outer surface of the third divided door 11C and the operation of the handle 15 (locking / unlocking lever). The rod 16 is configured as a main part, and the rod 16 is always urged outward in the vehicle width direction by an elastic member such as a compression coil spring (not shown). That is, in the state where the locking / unlocking lever of the handle 15 is released, the outer end in the vehicle width direction of the rod 16 protrudes from the outer end surface of the guide roller 12 and is provided on the stationary side (for example, the guide rail 6). The rear door 10 that is inserted into the receiving portion and is not in the lowered position is restricted from moving up and the rear door 10 in the raised position is lowered. On the other hand, when the locking / unlocking lever of the handle 15 is grasped, the rod 16 moves backward inward in the vehicle width direction to release the engagement state between the rod 16 and the receiving portion, and the rear door 10 is moved up and down. Permissible.

  The handle 15 is provided with a lever operation restricting pin (not shown) for fixing the locking / unlocking lever in a state where it is always held, that is, in a state where the latch lock is always unlocked. By mounting the lever operation restricting pin, the latch lock is always unlocked (the rear door 10 is allowed to move up and down). On the other hand, for example, when the drive mechanism S for automatically moving the rear door 10 up and down fails and the rear door 10 cannot be moved up and down automatically, the lever operation restriction pin is detached from the handle 15. And enables operation of the locking / unlocking lever. Thereby, even when the drive mechanism S breaks down, the rear door 10 can be manually moved up and down, and the rear door 10 can be reliably stopped at the raised position or the lowered position.

  As shown in FIGS. 4 (a) and 4 (b), folded portions 11a arranged on the outer side in the vehicle width direction of the guide rail 6 are provided at both ends in the vehicle width direction of the divided doors 11 (11A to 11C). . By providing such a turn-up portion 11a, rainwater and foreign matter can be prevented from entering the rail portion (roller transfer surface) of the guide rail 6 as much as possible, and the smooth up-and-down movement of the rear door 10 is ensured. It is like that. The guide rail 6 is provided with a reinforcing portion 6a having an L-shaped cross section. If such a reinforcing portion 6a is provided, the roller rolling surface of the guide rail 6 is deformed when the dust thrown into the dust throwing box 1 comes into contact with the guide rail 6, and as a result, the rear door It prevents as much as possible that the situation where 10 cannot move up and down smoothly is produced.

  As described above, the rear door 10 provided for closing or opening the dust inlet 7 opened at the lower part of the rear surface has a plurality of divided doors 11 connected in the moving direction, and adjacent divided doors. 11 and 11 are connected so as to be relatively rotatable, the rear door 10 can be arbitrarily deformed. Therefore, even when the guide rail 6 or the upper cover 5 is changed in shape, the rear door 10 is While being deformed along the guide rail 6, it can be smoothly moved up and down. Therefore, it is possible to increase the degree of design freedom of other components such as the guide rail 6 and the upper cover 5 and other components of the dust throwing box 1, and it is necessary to design these members exclusively according to the shape (cross-sectional shape) of the rear door 10. Disappears. Therefore, the various components can be shared, and the degree of freedom in combining the various components can be increased, so that the cost of the dust box 1 can be reduced. In addition, the compatibility of the rear door 10 is enhanced, and the rear door 10 can be easily attached to the existing dust bin 1.

  Further, if the rear door 10 is formed by connecting a plurality of divided doors 11 so as to be relatively rotatable, even if a part of the rear door 10 is greatly deformed, the divided door 11 in which the deformation has occurred is replaced. This will complete the repair. Therefore, compared with the conventional structure which comprised the rear door with the panel-like member of 1 sheet, there also exists an advantage that the effort and expense which are required for the maintenance of the rear door 10 can be reduced.

  Hereinafter, the configuration of the drive mechanism S will be described in detail.

  An angle 4a extending in the vehicle width direction is provided at the rear end portion of the top board 4 of the garbage throwing box 1 (the ceiling surface of the dust throwing box 1), and the rear door 10 is placed between the lowered position and the raised position on this angle 4a. One end of a drive mechanism S for automatically moving up and down between two positions is attached and fixed. As shown in FIGS. 5 (b) and 6 (b), the drive mechanism S is disposed at the center of the garbage throwing box 1 in the vehicle width direction, and is a link mechanism 30 as an expansion / contraction mechanism that can expand and contract in the longitudinal direction of the vehicle body. And a hydraulic cylinder 40 that expands and contracts the link mechanism 30.

  The link mechanism 30 includes a pair of first link members 31 and 31 connected in an inverted V shape, a pair of second link members 32 and 32 connected in an X shape, and a pair connected in a V shape. The third link members 33 and 33 are connected to each other so that the lower end portion (rear end portion) of the first link member 31 and the upper end portion (front end portion) of the second link member 32 are connected to each other so as to be relatively rotatable. This is a so-called pantograph-type link mechanism 30 configured by connecting the lower end portion (rear end portion) of the link member 32 and the upper end portion (front end portion) of the third link member 33 so as to be relatively rotatable. One end of the link mechanism 30 (the connecting portion between the first link members 31 and 31) is rotatably connected to the central portion in the longitudinal direction of the angle 4a (the central portion in the vehicle width direction of the ceiling surface of the dust box 1). The other end of the link mechanism 30 (the connecting portion between the third link members 33) is rotatably connected to the vehicle width direction central portion of the rear door 10 via the connecting member 38. In the present embodiment, the other end of the link mechanism 30 is rotatably connected to a connecting shaft 13 that connects the first divided door 11 </ b> A and the second divided door 11 </ b> B through a connecting member 38 so as to be relatively rotatable. (See FIGS. 1 and 2). In addition, the connection position in the vehicle body vertical direction with respect to the rear door 10 at the other end of the link mechanism 30 can be changed as appropriate. For example, the second divided door 11 </ b> B and the third divided door 11 </ b> C may be connected to the connecting shaft 13 connected so as to be relatively rotatable, or may be connected to the back surface of any of the divided doors 11.

  As shown in FIGS. 5A and 6A, a guide mechanism 50 that guides the expansion / contraction operation (extension / contraction deformation) of the link mechanism 30 is provided below the link mechanism 30. The guide mechanism 50 is arranged in parallel with the link members 31 to 33 (the expansion and contraction orbits of the link members 31 to 33), and extends along a line segment (center line of the dust bin 1) that passes through the connecting portion between the link members. A linear guide rail 51 and a slide block 52 slidably fitted to the linear guide rail 51 are provided. The slide block 52 includes a second link member 32, a connecting portion 34 between the 32 link members 32, and a third link member. It is attached and fixed to the connecting portion 35 between 33 and 33.

  The hydraulic cylinder 40 includes a cylinder part 41 having a telescopic cylinder rod, and a pressure oil supply part 42 including a pump for supplying hydraulic oil to the oil chamber of the cylinder part 41, a pump driving motor, various valves, and the like. Are arranged so that the expansion / contraction direction (the expansion / contraction direction of the cylinder rod) is parallel to the expansion / contraction direction of the link mechanism 30. In the present embodiment, the cylinder rod extends and contracts in the longitudinal direction of the bracket 43 with respect to the pair of brackets 43, 43 disposed outside the linear guide rail 51 in the vehicle width direction and extending in parallel with the linear guide rail 51. Thus, the hydraulic cylinders 40, 40 are fixed respectively. More specifically, in each hydraulic cylinder 40, the cylinder tube of the cylinder portion 41 is connected to the bracket 43, and the cylinder rod of the cylinder portion 41 is connected to the slide block 52 (the connection between the second link members 32 and 32 via the connecting member). The slide block 52) is fixedly attached to the portion 34. From the above, when the cylinder rod of the hydraulic cylinder 40 is extended, the link mechanism 30 is in the shortened state shown in FIG. 5. On the contrary, when the cylinder rod of the hydraulic cylinder 40 is shortened, the link mechanism 30 is 6 is the extended state.

  Note that it is not always necessary to use two hydraulic cylinders 40 as in this embodiment, and only one hydraulic cylinder 40 may be used. However, in order to cause the link mechanism 30 to expand and contract using a single hydraulic cylinder 40 in the same configuration as described above, the pressure supplied to the hydraulic cylinder 40 is expanded and deformed using the two hydraulic cylinders 40. Double the case.

  From the above configuration, when the cylinder rod of the cylinder portion 41 of the hydraulic cylinder 40 is extended, the link mechanism 30 is in the shortened state shown in FIGS. 5A and 5B, and the rear door 10 opens the dust inlet 7. It will be in the raised position. On the other hand, when the cylinder rod of the cylinder portion 41 of the hydraulic cylinder 40 is shortened, the link mechanism 30 is in the extended state shown in FIGS. 6 (a) and 6 (b), and the rear door 10 is in the lowered position where the dust inlet 7 is closed. Will be located. Accordingly, when an operation signal of the rear door 10 is input to the pressure oil supply part 42 of the hydraulic cylinder 40, the cylinder rod of the cylinder part 41 of the hydraulic cylinder 40 and further the expansion and contraction operation of the link mechanism 30 connected thereto. The rear door 10 automatically moves up and down between two positions, a lowered position and a raised position. The rear door 10 can be stopped even at a neutral position between the lowered position and the raised position.

  In the drive mechanism S (hydraulic cylinder 40), an operator operates a rear door opening / closing switch (snap switch in the illustrated example) 21 on the operation panel 20 provided at the lower rear end of the left side plate 2 of the dust box 1. Accordingly, the rear door 10 automatically moves up and down. In order to call attention to the surroundings, an alarm buzzer sounds while the rear door 10 is moved up and down. A cord switch 14 is provided at the lower end of the rear door 10, and when the dust switch or an operator is caught under the rear door 10 and the cord switch 14 is pressed, the rear door 10 that is moving up and down is moved. Forced to move up.

  The operation panel 20 is further provided with an emergency stop button 23 for urgently stopping the activated dust loading device in addition to the operation / stop button 22 for the dust loading device. An emergency stop of the dust loading apparatus in operation is performed by pressing an emergency stop button 23 provided at the lower rear end of the right side plate 2 of the dust throwing box 1 or a bar type emergency stop switch 24 provided below the rear door 10. Execution is also possible by operating.

  In the present invention, the expansion / contraction mechanism, which is a functional component for moving the rear door 10 up and down, is composed of the pantograph-type link mechanism 30 in which a plurality of link members are connected so as to be relatively rotatable. While the drive mechanism S has a compact configuration, a required expansion / contraction stroke (amount of up / down movement of the rear door 10) can be ensured. In addition, since the link mechanism 30 and the hydraulic cylinder 40 (drive mechanism S) are arranged in the upper center of the dust input box 1, the dust that has been input into the dust input box 1 with respect to the link mechanism 30 and further to the drive mechanism S is retained. It becomes difficult to interfere. Thereby, it becomes difficult to produce the situation where the opening / closing function of the rear door 1 is impaired compared with the conventional product, and the reliability of the dust box 1 is improved.

  In the embodiment described above, the hydraulic cylinder 40 for expanding and contracting the link mechanism 30 is arranged so that the expansion and contraction direction thereof is parallel to the expansion and contraction direction of the link mechanism 30. ), The expansion / contraction direction may be arranged so as to be inclined with respect to the expansion / contraction direction of the link mechanism 30. More specifically, in the embodiment shown in FIG. 7, the hydraulic cylinders 40, 40 are disposed on the outer side in the vehicle width direction than the link mechanism 30, and one end (cylinder tube) of the cylinder portion 41 of each hydraulic cylinder 40 is connected to the angle 4 a. The other end (cylinder rod) of the cylinder portion 41 is rotatable with respect to the connecting portion 36 of the first link member 31 and the second link member 32 constituting the pantograph type link mechanism 30. By connecting, the expansion / contraction direction of the hydraulic cylinder 40 is inclined with respect to the expansion / contraction direction of the link mechanism 30.

  When the hydraulic cylinder 40 is arranged and connected to the link mechanism 30 in the above-described manner, when the cylinder rod of the hydraulic cylinder 40 is extended, the link mechanism 30 is extended and the rear door 10 is positioned at the lowered position. In other words, when the cylinder rod of the hydraulic cylinder 40 is shortened, the link mechanism 30 is shortened and the rear door 10 is positioned at the raised position.

  If the hydraulic cylinder 40 is arranged in the manner shown in FIG. 7, the arrangement position of the hydraulic cylinder 40 is shifted relatively upward as compared with the case where the configuration shown in FIGS. In addition to being able to effectively use the internal space of the dust box 1, the dust thrown into the dust box 1 is less likely to interfere with the hydraulic cylinder 40. is there. Further, since the bracket 43 for fixing (holding) the hydraulic cylinder 40 is not required, the drive mechanism S can be reduced in weight and size. 5 and 6, the hydraulic cylinders 40, 40 are arranged via the slide block 52 (the slide block 52 provided at the connecting portion 34 between the second link members 32, 32) constituting the guide mechanism 50. Since the cylinder rod is connected to the link mechanism 30, the guide mechanism 50 is indispensable for expanding and contracting the link mechanism 30. However, in the configuration shown in FIG. 7, the cylinder rod of the hydraulic cylinder 40 is directly linked. Since it is connected to the mechanism 30, the guide mechanism 50 can be omitted. Since the rear door 10 is guided and moved along the pair of left and right guide rails 6, even if the guide mechanism 50 is omitted, the expansion / contraction operation performance of the link mechanism 30 and thus the opening / closing performance of the rear door 10 is lowered. It is hard to happen.

  On the other hand, when the hydraulic cylinder 40 is arranged so that its expansion / contraction direction is parallel to the expansion / contraction direction of the link mechanism 30 as shown in FIGS. In particular, there is an advantage that the maximum expansion / contraction stroke of the link mechanism 30 can be ensured while using a small hydraulic cylinder 40 (hydraulic cylinder 40 having a small expansion / contraction stroke). In the embodiment shown in FIG. 7, the cylinder rod of the hydraulic cylinder 40 is directly connected to the connecting portion 36 of the first link member 31 and the second link member 32, so that the link mechanism 30 is smoothly expanded and contracted. In such a case, a large load is applied to the connecting portion 36, which may adversely affect the durability life of the link mechanism 30. However, the configuration shown in FIGS. There is an advantage that it is not necessary to consider.

  Although the dust input box 1 according to the embodiment of the present invention has been described above, various changes can be made to the dust input box 1 without departing from the gist of the present invention.

  For example, in the embodiment described above, the rear door 10 is configured by connecting the three divided doors 11 connected in the moving direction so as to be relatively rotatable. Depending on the opening size of the mouth 7 or the like, it is possible to make two or four or more. If the number of the divided doors 11 is increased, the degree of freedom of deformation of the rear door 10 is further improved.

  In the embodiment described above, the pantograph-type link mechanism 30 is configured by rotatably connecting three sets of link members (the first link member 31, the second link member 32, and the third link member 33). However, for example, when a larger amount of expansion / contraction stroke is required, the pantograph-type link mechanism 30 can be configured by rotatably connecting four or more sets of link members.

  Further, in the dust box 1 described above, the hydraulic cylinder 40 and the link mechanism 30 are expanded and contracted by operating the rear door opening / closing switch 21 provided on the operation panel 20, and the rear door 10 is automatically operated in conjunction with this. The rear door 10 is configured to automatically move up and down by using a power take-out device (PTO) for driving the dust loading device. Is also possible.

  Specifically, a switch for PTO operation and a switch for switching “automatic operation” / “single operation” of the rear door 10 are provided in the cab of the garbage truck. After stopping the garbage collection vehicle, when the PTO operation switch is turned on and the PTO is operated with the switching switch set to “automatic operation”, the rear door 10 automatically starts to move upward. Similarly, when the PTO operation switch is turned OFF to stop the PTO, the rear door 10 automatically starts to move downward. If such a configuration is adopted, it is possible to move the rear door 10 of the dust input box 1 to the raised position before the worker gets off and moves to the rear side of the dust input box 1, that is, the dust input. Since the mouth 7 can be opened, dust collection (loading) work can be started quickly, and work efficiency is improved. Further, if the PTO is stopped at the stage when the dust loading operation is completed, the rear door 10 of the dust box 1 can be automatically moved to the lowered position, so that the dust collection operation is quickly completed (dust collection). The vehicle stop time can be shortened), and the working efficiency is also improved in this respect. In the state where the switch for switching is set to “automatic operation”, the rear door 10 is configured not to operate even if the rear door opening / closing switch 21 of the operation panel 20 is operated.

  Even in this case, when the rear door 10 is automatically opened and closed, the alarm buzzer sounds to alert the surroundings. However, even if such safety measures are taken, if the rear door 10 automatically opens and closes without the operator being near the dust inlet 7 of the dust inlet box 1, Is involved and the probability of an accident increases. Therefore, when collecting dust in an area where traffic is heavy, the switch for switching on the driver's seat is switched from “automatic operation” to “single operation”, and the rear door on the operation panel 20 is opened and closed. The rear door 10 is automatically opened and closed only by the operation of the switch 21.

1 Dust input box 6 Guide rail 7 Dust input port 10 Rear door 11 Divided door 12 Guide roller 13 Connecting shaft 20 Operation panel 21 Rear door opening / closing switch 30 Link mechanism (pantograph type link mechanism)
31 First link member 32 Second link member 33 Third link member 40 Hydraulic cylinder 41 Cylinder portion 42 Hydraulic oil supply portion 50 Guide mechanism 51 Linear guide rail 52 Slide block S Drive mechanism

Claims (5)

A dust input box that is openably and closably connected to a rear part of a dust storage box mounted on a vehicle body,
A rear door that is guided and moved along a guide rail having a curved portion at least partially between a lowered position that closes the dust inlet that is opened on the rear surface and a raised position that opens the dust inlet; A drive mechanism for moving the rear door between the two positions, and when the rear door is moved to the raised position, the rear door is disposed on the inner side of the rear surface of the dust bin.
The rear door has a plurality of divided doors arranged in a moving direction thereof, and is connected to the adjacent divided doors so as to be relatively rotatable. The drive mechanism includes a telescopic mechanism that is extendable between a shortened state in which the rear door is positioned at the raised position and an extended state in which the rear door is positioned in the lowered position,
The one end and the other end of the expansion / contraction mechanism are rotatably connected to a vehicle width direction center portion of the ceiling surface of the dust box and a vehicle width direction center portion of the rear door, respectively. Waste collection box of a garbage truck. The expansion / contraction mechanism is configured by a pantograph-type link mechanism in which a plurality of link members are connected so as to be relatively rotatable. The drive mechanism includes the link mechanism as the expansion / contraction mechanism and a hydraulic cylinder that expands and contracts the link mechanism. The refuse input box of the refuse collection vehicle according to claim 2, wherein   The dust box of the refuse collection vehicle according to claim 3, wherein the hydraulic cylinder is arranged so that an expansion / contraction direction thereof is parallel to an expansion / contraction direction of the link mechanism.   4. A dust input box for a dust collection vehicle according to claim 3, wherein the hydraulic cylinder is disposed such that its expansion / contraction direction is inclined with respect to the expansion / contraction direction of the link mechanism.

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