JP3863758B2 - Garbage truck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a dust collecting box, in particular, a dust container that communicates with the inside of the container box is connected to a rear opening of a dust container box mounted on a vehicle body, and a rear surface of the dust container box is disposed inside the container box. In addition, a sliding plate that can slide up and down between an upper limit position and a lower limit position and forcibly sliding the sliding plate is formed inside the dust box. A sliding plate driving means to be moved, a pushing plate whose base end is pivotally supported at the lower portion of the sliding plate and capable of swinging back and forth between the foremost compression position and the last limit reversal position, and the pushing plate Pushing plate drive means for forcibly swinging is installed.In a normal dust pushing cycle, the sliding plate is lowered to the lower limit position while holding the pushing plate in the limit reversal position, so that The primary compression process is performed, and then the pushing plate is moved to the limit position while the sliding plate is held at the lower limit position. The secondary compression process is performed on the dust after the primary compression by swinging from the position to the compression position, and then the secondary compression is performed by raising the sliding plate to the upper limit position while holding the pushing plate in the compression position. after the forced pushing step to dust containing box in is performed with respect to dust, to refuse collection vehicles of the type returning step has been to so that is executed to return the pushing plate after completion of the forced pushing process cycle initial position.
[0002]
[Prior art]
In the conventional garbage truck of the above type, after the forced pushing process is completed, the pushing plate is reversed to the limit reversing position while the sliding plate is held at the upper limit position as shown in FIG. The primary compression process is started after the reversal is completed. In such a pushing plate return method, particularly in the state where the inside of the dust container is almost full of pushed dust, There is a problem like this. In other words, after the forced indentation process is completed, when the pushing plate is reversed and swung to the limit reversal position while the sliding plate is held at the upper limit position, a part of the pushing dust that is compressed in the full dust container box (Particularly in the vicinity of the front of the push plate) was released from the push plate that was largely reversed and retracted backward, and dropped to the bottom of the dust throwing box.
[0003]
Therefore, in order to solve such a problem, as shown in FIG. 7B, the sliding plate is moved to the upper limit position and the lower limit position while the pressing plate is held in the compressed position in accordance with the completion of the forced pressing step. , Once lowered to a predetermined intermediate lowering position set in between, and after the lowering, the pushing plate is reversed from the compression position to the limit reversal position, and the primary compression process is started after the reversal is completed. A technique has already been proposed (see, for example, JP-A-2001-139106).
[0004]
That is, in this proposal, the pushing plate continues to be held in the compression position as the sliding plate descends from the upper limit position to the intermediate lowering position, so that the pushing dust drops to the bottom side of the dust input box. Since the sliding plate (and hence the pushing plate) has already been lowered to the intermediate lowering position at the time when the pushing plate starts to reverse, a part of the pushing dust from that position has moved into the dust throwing box. Even if it falls to the bottom, there is an advantage that the drop between the position and the bottom of the charging box is reduced, and it is possible to effectively prevent dust from jumping out of the charging port.
[0005]
[Problems to be solved by the invention]
However, in the proposed dust backflow prevention technology, it is necessary to keep the pushing plate in the compression position against the large pushing reaction force of the pushing dust while the sliding plate descends from the upper limit position to the intermediate lowering position. Meanwhile, the pushing plate driving means must continue to output a large driving force for holding the pushing plate in the compressed position, and the load on the pushing plate driving means increases accordingly, and the pushing plate and its supporting mechanism section There are problems such as an increased load burden.
[0006]
The present invention has been proposed in view of the above, and it is an object of the present invention to provide a garbage collection vehicle capable of effectively preventing the dumping dust from jumping out from the dust box input port while solving the above problems of the conventional apparatus. And
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, there is provided a dust opening box connected to the rear opening of a dust box mounted on a vehicle body, and the rear surface of the dust box. In this case, an input port for introducing dust is formed in the input box, and further inside the dust input box, there is a sliding plate that can slide up and down between an upper limit position and a lower limit position. Sliding plate driving means for forcibly sliding the moving plate, and a pusher that can swing back and forth between the foremost compression position and the last limit reversal position with the base end pivotally supported at the bottom of the sliding plate And a pushing plate driving means for forcibly swinging the pushing plate. In a normal dust pushing cycle, the dust plate is moved down to the lower limit position while holding the pushing plate at the limit reversal position. The primary compression process was performed on the input dust in the input box, and then the sliding plate was held at the lower limit position. The secondary compression process is performed on the dust after the primary compression by swinging the pushing plate from the limit reversal position to the compression position, and then the sliding plate is raised to the upper limit position while holding the pushing plate in the compression position. In this way, a dust collection vehicle in which a forced pushing process of dust after secondary compression into the dust containing box is executed, and a return process for returning the pushing plate to the cycle initial position is executed after the forced pushing process is completed. In the return step, in accordance with the completion of the forced pushing step, the pushing plate is primarily reversed to a predetermined intermediate reversing position set between the compression position and the limit reversing position, and then the sliding plate is After lowering to a predetermined intermediate lowering position set between the upper limit position and the lower limit position, the pushing plate is secondarily reversed to the limit reversal position, and the primary compression process is started after the second reversal. Characterized in that it comprises a controllable control the operation of the slide plate driving means and the pushing plate driving means.
[0008]
According to the above feature, in a normal dust pushing cycle, in the return step of returning the pushing plate to the cycle initial position after the forced pushing step is finished, the pushing plate is first subjected to a predetermined intermediate reversal when the forced pushing step is finished. First reverse to the position, then lower the sliding plate to a predetermined intermediate lowering position, and then secondarily reverse the pushing plate to the limit reversing position, and after this second turning, the primary compression process by the pushing plate can be started. ing. In this case, the primary reversal has a relatively small amount of reversal of the pushing plate, and the amount of opening between the pushing plate and the bottom rear end of the dust storage box can be kept relatively small. It is possible to suppress as much as possible that the pushed-in dust container in the containing box falls to the bottom of the dust container box (and that the dust container jumps out of the input port due to bounce). On the other hand, in the above-mentioned secondary reversal, although the reversal amount of the pushing plate is maximized, the reversing is started after the sliding plate is lowered to the intermediate lowering position. The drop between a certain indentation dust and the bottom of the dust input box is relatively small. Therefore, even if a part of the indentation dust falls to the bottom of the dust input box due to secondary reversal, it is thrown in with a bounce. Jumping out of the mouth can be effectively avoided. In addition, as the forced pushing process is completed, the pushing plate is immediately primary-reversed to the intermediate reversing position, so the load on the pushing plate driving means and the load on the pushing plate and its supporting mechanism are reduced quickly and effectively. Is done.
[0009]
Further, in addition to the above feature of the invention of claim 1, the invention of claim 2 is arranged such that the indentation dust in the dust storage box is formed at the bottom of the dust input box at the time of the primary reversal of the indentation plate. According to this feature, the fall restraining piece for restraining the fall is integrally provided, and according to this feature, the fall restraining piece is engaged with the pushing dust in front of the pushing plate at the time of the primary inversion. By doing so, the fall of the dust to the bottom of the dust input box is more effectively suppressed.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.
[0011]
In the accompanying drawings, FIGS. 1 to 6 show an embodiment of the present invention. FIG. 1 is a side view in which a main part of a garbage truck is broken, and FIG. 2 is a main part of a pushing plate. FIG. 3 is an enlarged perspective view of FIG. 1, FIG. 3 is an enlarged view of the arrow 3 in FIG. 2, and FIG. 4 is a circuit diagram showing an example of a hydraulic circuit for operating the push cylinder and the lifting cylinder. FIG. 5 is a cycle diagram schematically showing the sequential operation of the pushing plate and the sliding plate, and FIG. 6 is an operation explanatory diagram showing the returning process of the pushing plate.
[0012]
First, in FIG. 1, a garbage storage box B is mounted on the vehicle body F of the garbage collection vehicle V, and the front opening is opened at the rear opening of the dust storage box B so as to directly communicate with the interior of the storage box B. A dust input box A is continuously provided. The front end of the dust bin A is hinged to the rear end of the upper wall of the dust storage box B, and can be opened and closed around the connecting portion by driving means (not shown).
[0013]
On the rear surface of the dust input box A, an input port O for inputting dust into the input box A is formed. Further, in the dust input box A, there are an upper limit position Su and a lower limit position Sd. As a sliding plate driving means interposed between the sliding plate S that can slide up and down between the plate S and the upper wall portion of the dust box A in order to force the sliding plate S to slide. The lifting cylinder Ds, the pushing plate P whose base end is pivotally supported 2 below the sliding plate S and swingable back and forth between the foremost compression position Pf and the last limit reversal position Pr, and this pushing A pushing cylinder Dp as a pushing plate driving means interposed between the plate P and the upper end portion of the sliding plate S is disposed to forcibly swing the plate P.
[0014]
Both the sliding plate S and the pushing plate P are formed to fill the width of the interior space of the dust box A, and guides for guiding the slide of the sliding plate S to the left and right side walls of the dust box A. A guide support mechanism 3 including a groove 3a, a roller 3b, and the like is provided.
[0015]
Referring to FIGS. 2 and 3 together, on the front surface 4 of the pushing plate P, the pushing dust in the dust containing box B is moved along the upper edge of the pushing plate P when the inversion will be described later. A back tooth T as a drop restraining piece for restraining falling to the inner bottom portion is integrally projected. The back teeth T are formed in a band plate shape that extends to the full width of the pressing plate P, and are inclined upward from the front four bases of the pressing plate P. The lower side of the back teeth T is integrally supported by a support plate 5a protruding from the front surface 4 of the push plate P.
[0016]
Further, the lower edge 4s of the front surface 4 of the pushing plate P is formed as an inclined surface inclined forward and downward. A plurality of reinforcing ribs 5b extending in the vertical direction are connected to the front surface 4 of the pushing plate P so as to connect the inclined lower edge 4s of the pushing plate P and the support plate 5a integrally with each other. And projecting integrally.
[0017]
On the inner bottom surface 6 of the dust box A, a primary compression surface 6a having an arcuate cross section for primary compression of dust in cooperation with the plate P during the first compression operation of the pushing plate P, which will be described later, and the primary compression surface 6a From the front edge of the dust container box B toward the lower edge of the rear end opening of the dust container box B, and the secondary compression of the dust plate P in cooperation with the plate P during the first compression operation of the push plate P, which will be described later, and the subsequent push operation Sometimes, a secondary compression surface 6b is formed that guides the dust up into the dust container B.
[0018]
FIG. 4 shows an example of a hydraulic circuit for controlling the operation of the elevating cylinder Ds and the pushing cylinder Dp. In the middle of the oil passage connecting between the elevating cylinder Ds and the pushing cylinder Dp, the hydraulic pump 7 and the oil tank 8, an electromagnetic for performing supply / discharge control of the output hydraulic pressure of the hydraulic pump 7 with respect to the cylinders Ds and Dp. Control valves Vs and Vp are interposed, respectively, and the operation of these control valves Vs and Vp and the hydraulic pump 7 is controlled by a control device C which is installed at a proper position in the vehicle body and incorporates a microcomputer. The control device C is connected to an operation panel (not shown) provided at an appropriate position on the vehicle body so as to be arbitrarily operated from the outside.
[0019]
The control device C includes a push plate position sensor (not shown) that detects that the push plate P is in various operating positions (for example, the compression position Pf, the limit reversal position Pr, and an intermediate reversal position Px described later) S is connected to a sliding plate position sensor (not shown) that detects that the actuator is in various operating positions (for example, an upper limit position Su, a lower limit position Sd, and an intermediate lowering position Sx described later). Based on this, the operations of the control valves Vs, Vp and the hydraulic pump 7 can be controlled following a preset control program. In the present invention, in order to detect at least one of the intermediate inversion position Px and the intermediate lowering position Sx, a timer may be used instead of the position sensor as shown in the drawing.
[0020]
Thus, a normal dust pushing cycle includes a forced pushing step for pushing dust put into the dust throwing box A into the dust containing box B, and a return step for returning the pushing plate P to the cycle initial position after the pushing step. This cycle is repeated as many times as necessary until there is no additional dust.
[0021]
As shown in FIG. 6, the forced pushing process is started from a state where the dust pushing plate P is positioned at the limit reversal position Pr and the sliding plate S is positioned at the intermediate lowering position Sx. First, by lowering the sliding plate S to the lower limit position Sd while the pushing plate P is held at the limit reversal position Pr, the primary compression process for the charged dust in the dust charging box A is executed, and then the sliding plate S is The secondary compression process for the dust after the primary compression is executed by swinging the pushing plate P from the limit reversal position Pr to the compression position Pf while being held at the lower limit position Sd. Next, by forcibly pushing the sliding plate S up to the upper limit position Su while holding the pushing plate P at the compression position Pf, a forced pushing step into the dust container B for the dust after the secondary compression is performed.
[0022]
Referring also to FIG. 5, in the return step, a predetermined intermediate reversal position in which the push plate P is set between the compression position Pf and the limit reversal position Pr in accordance with the completion of the forced push step. First-order inversion to Px. Next, the sliding plate S is lowered to a predetermined intermediate lowering position Sx set between the upper limit position Su and the lower limit position Sd, and then the pushing plate P is secondarily reversed to the limit reversing position Pr. After the process is completed, the next forced pushing process (that is, the primary compression process) is started.
[0023]
Next, the operation of the embodiment will be described. When the refuse collection vehicle V arrives at the dust collection place and starts the dust throwing work to the throwing opening O of the dust throwing box A, an operator inputs an operation panel (not shown) to start a dust pushing cycle.
[0024]
First, in the forced pushing step, first, the sliding plate S is lowered to the lower limit position Sd while the pushing plate P is held at the limit reversal position Pr, so that the primary compression step for the throwing dust in the dust throwing box A is executed. Then, the pushing plate P swings from the limit reversal position Pr to the compression position Pf while the sliding plate S is held at the lower limit position Sd, whereby the secondary compression process for the dust after the primary compression is performed. Next, the sliding plate S rises to the upper limit position Su while holding the pushing plate P at the compression position Pf, so that a forced pushing step into the dust container B for the dust after the secondary compression is executed.
[0025]
Immediately after the end of the forced pushing process, the process immediately proceeds to the returning process. That is, in accordance with the completion of the forced pushing process, the pushing plate P first reverses primarily to a predetermined intermediate reversing position Px, and then the sliding plate S descends to a predetermined intermediate lowering position Sx, and then the pushing plate P Is secondarily reversed to the limit reversal position Pr, and after the second reversal, the next dust pushing-in cycle is started, and the forced pushing-in process (that is, the primary compression process by the pushing plate P) of the next cycle is started.
[0026]
In this case, since the primary reversal has a relatively small amount of reversal of the pushing plate P, and the amount of opening between the pushing plate P and the bottom end of the dust storage box B is also relatively small, As a result, it is possible to suppress as much as possible that the pushed-in dust container in the dust container B is dropped to the bottom of the dust container A (and thus the falling dust is bounced and jumps out of the container A through the inlet O). In other words, the intermediate inversion position Px is set as the inversion position of the push-in plate P that can perform such a dust dropping function.
[0027]
Moreover, in this primary inverted state, the front surface 4 of the push-in plate P is arranged so as to be substantially along the rearward extension line of the sliding plate S, and the back tooth T as a drop suppression piece protruding from the base portion of the front surface 4 Is engaged with the pushing dust bin on the front side of the pushing plate P, so that the dropping of the dust to the bottom of the dust throwing box A is more effectively suppressed.
[0028]
On the other hand, in the above-described secondary reversal, although the reversal amount of the pushing plate P is maximized, the reversing is started after the sliding plate S is lowered to the intermediate lowering position Sx. The drop between the indentation dust on the front side of the plate P and the bottom of the dust input box A is relatively small. Therefore, even if a part of the indentation dust falls to the bottom of the dust input box A due to secondary reversal. , It can be effectively avoided that it jumps out of the insertion port O due to the spring. In other words, the intermediate lowering position Sx is set as the height position of the sliding plate S that can fulfill such a dust jump-out preventing function.
[0029]
In addition, since the pushing plate P is immediately primary-reversed to the intermediate reversal position Px immediately after the forced pushing process is completed, the load on the pushing plate driving means Dp and the load on the pushing plate P and its supporting mechanism section are quick. And effectively mitigated.
[0030]
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various small design changes can be made.
[0031]
For example, in the above-described embodiment, the back teeth T as the fall restraining pieces for restraining the pushed dust particles from dropping into the bottom of the dust container A when the push plate P is primarily reversed at the front four bases of the push plate P. Although what was provided was shown, in this invention of Claim 1, you may abbreviate | omit such a fall suppression piece.
[0032]
In the return process of the pushing plate P in the above embodiment, the pushing plate P is primarily reversed to the intermediate inversion position Px in accordance with the end of the forced pushing process, and then the sliding plate S is lowered to the intermediate lowering position Sx. The next forced pushing process is started after the pushing plate P is secondarily reversed to the limit reversing position Pr. Such a returning process (FIGS. 5 and 6) characterized by the present invention, The control device C may be configured so that such a return process can be selectively executed at any time by an arbitrary operation on the operation panel.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the normal dust pushing-in cycle, in the return step of returning the pushing plate to the cycle initial position after the forced pushing step is completed , first, according to the completion of the forced pushing step. The push plate is primarily reversed from the compression position to a predetermined intermediate reversal position, then the sliding plate is lowered from the upper limit position to a predetermined intermediate lower position, and then the push plate is secondarily reversed to the limit reversal position. After the reversal, the primary compression process by the pushing plate can be started, so even if the dust container is full of pushed dust, the load on the pushing plate drive means and the load on the pushing plate and its support mechanism It is possible to effectively suppress the push-out dust from popping out from the insertion opening accompanying the inversion of the push-in plate.
[0034]
According to the invention of claim 2 in particular, when the push plate is in the above-mentioned primary reversal, the drop suppression piece engages with the push dust on the front side of the push plate, so that the push dust is dropped to the bottom of the dust input box. It can suppress more effectively.
[Brief description of the drawings]
FIG. 1 is a side view in which a main part of a garbage truck according to an embodiment of the present invention is cut away. FIG. 2 is an enlarged perspective view showing the main part of a push-in plate (enlarged view taken along arrow 2 in FIG. 1).
FIG. 3 is an enlarged view taken along arrow 3 in FIG. 2. FIG. 4 is a circuit diagram showing an example of a hydraulic circuit for operating the pushing cylinder and the lifting cylinder. FIG. 5 is a simplified sequential operation of the pushing plate and the sliding plate. FIG. 6 is an explanatory diagram showing the operation of returning the pushing plate. FIG. 7 is a cycle diagram showing the sequential operation of the pushing plate and the sliding plate in the conventional example.
A ... Dust input box B ... Dust storage box C ... Control device Dp ... Push cylinder (push plate driving means)
Ds ... Elevating cylinder (sliding plate driving means)
F ··· Car body O ··············· Pushing plate Pf ··· Compression position Pr ··· Limit reversal position Px ··· Intermediate reversal position S ··· Sliding plate Sd · .... Lower limit position Su ... Upper limit position Sx ... Intermediate lowering position T ... Back teeth (falling suppression piece)
V ... Garbage truck

Claims (2)

A dust input box (A) communicating with the inside of the storage box (B) is connected to the rear opening of the dust storage box (B) mounted on the vehicle body (F), and is disposed on the rear surface of the dust input box (A). Is formed with an input port (O) for introducing dust into the input box (A), and an upper limit position (Su), a lower limit position (Sd), and a dust input box (A). A sliding plate (S) that can slide up and down, sliding plate driving means (Ds) for forcibly sliding the sliding plate (S), and a base end at the lower portion of the sliding plate (S) Is supported on the push plate (P) that can swing back and forth between the foremost compression position (Pf) and the last limit reversal position (Pr), and the push plate (P) is forcibly swung. A pushing plate driving means (Dp),
In a normal dust pushing-in cycle, the throwing-in dust in the dust-filling box (A) is lowered by lowering the sliding plate (S) to the lower-limit position (Sd) while holding the pushing plate (P) in the limit reversal position (Pr). The first compression step is performed, and then the pushing plate (P) is swung from the limit reverse position (Pr) to the compression position (Pf) while holding the sliding plate (S) at the lower limit position (Sd). A secondary compression step is performed on the dust after the primary compression, and then the sliding plate (S) is raised to the upper limit position (Su) while holding the pushing plate (P) in the compression position (Pf), thereby are enforced pushing step into the dust container box for dust after compression (B) is, dust collecting the return step of returning the push plate after completion of the forced pushing step the (P) to the cycle initial position was so that runs In the car,
In the return step, the push plate (P) is moved to a predetermined intermediate reversal position (Px) set in the middle between the compression position (Pf) and the limit reversal position (Pr) in accordance with the completion of the forced push step. First, the sliding plate (S) is lowered to a predetermined intermediate lowering position (Sx) set between the upper limit position (Su) and the lower limit position (Sd), and then the pushing plate (P) is lowered. Control capable of secondarily reversing to the limit reversal position (Pr) and controlling the operation of the sliding plate driving means (Ds) and the pushing plate driving means (Dp) so that the primary compression process is started after the second reversal. A garbage collection vehicle comprising the device (C).   The front (4) base of the push-in plate (P) prevents the push-in dust in the dust storage box (B) from falling to the inner bottom of the dust-filling box (A) when the push-in plate (P) is primary reversed. The refuse collection vehicle according to claim 1, wherein a fall restraining piece (T) for projecting is integrally provided.

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