JP4999655B2 - Garbage truck - Google Patents

Description

  The present invention relates to a garbage collection vehicle having a function of detecting overloading of dust or a predetermined set amount.

  In a garbage collection vehicle, for example, in Patent Document 1, a load box that accommodates dust is supported via a load cell with respect to a chassis frame as a measure for measuring the weight of dust thrown into the load box. A technique for measuring the weight of dust is known. Moreover, when supporting a load box with respect to a chassis frame via a load cell in this way, a drop-off preventing structure is employed as described in Patent Document 2, for example.

  Further, for example, in Patent Document 3, in a garbage collection vehicle in which a rear wheel is spring-suspended on a chassis, a relative displacement amount between the rear wheel shaft and the chassis is electrically detected by a displacement meter in contact with a contact plate of a chassis differential portion. In addition, there is described a loaded weight measuring device for a garbage truck that displays a loaded weight based on the detection output. In this load weight measuring apparatus, when the garbage truck is traveling, the arm to which the displacement meter is attached is rotated by an actuator so that the displacement meter is sufficiently separated from the plate so that the displacement meter is not damaged.

JP 2004-224502 A JP 2004-224503 A JP-A-63-44128

  In the conventional garbage collection vehicle as described above, it is possible to accurately measure the dust weight, but there is a problem that the structure is very complicated and the cost is increased. In addition, in the refuse collection vehicle described in Patent Document 3, if the displacement meter is forgotten to be separated from the plate before the dust collection vehicle travels, the displacement meter may be damaged and caution is required. .

  Accordingly, an object of the present invention is to provide a dust collection vehicle that can detect dust overloading or a predetermined set amount with a simple structure and is easy to handle.

  The refuse collection vehicle of the present invention is a dust collection vehicle having an axle suspended from a chassis, provided on the chassis side, a transmission unit for transmitting a predetermined signal, and a signal transmitted by the transmission unit provided on the chassis side. The receiving unit is provided on the axle side, and the signal is passed through the signal transmission path until the relative position between the axle and the chassis enters a predetermined setting position, and the relative position between the axle and the chassis is predetermined. And a signal blocking unit for blocking the signal by intervening on the signal transmission path when entering the set position, and a notification unit for notifying according to the signal detection state by the receiving unit.

  In the refuse collection vehicle of the present invention, when the weight increases due to the dust being stored in the dust collection vehicle, the relative position between the axle and the chassis changes. When the relative position between the axle and the chassis enters a predetermined setting position corresponding to the overloading of the dust or a predetermined setting amount judgment signal, a signal transmitted from the transmitting unit provided on the chassis side is It is blocked by the signal blocking unit provided on the side and does not reach the receiving unit. As a result, signal blocking is detected by the receiving unit, and notification is made according to this detection state, so that it becomes possible to perform overloading of dust or a predetermined set amount.

  Alternatively, a signal blocking unit is provided on the axle side, and the signal is blocked by intervening on the signal transmission path until the relative position between the axle and the chassis enters a predetermined setting position, and the relative position between the axle and the chassis. When the signal enters a predetermined set position, the signal is removed from the signal transmission path and the signal is allowed to pass, and the notification unit can be configured to notify the signal according to the detection state of the signal by the reception unit. .

  In this case, when the relative position between the axle and the chassis enters a predetermined setting position corresponding to the overloading of the dust or the determination criterion of the predetermined setting amount, the signal transmitted from the transmission unit provided on the chassis side is The signal is not blocked by the signal blocking unit provided on the axle side, and reaches the receiving unit. As a result, a signal is detected by the receiving unit and notified in accordance with the detection state, so that it becomes possible to perform overloading of dust or a predetermined set amount.

  Here, it is desirable that the signal blocking unit is fixed on the differential carrier. Normally, the differential carrier is arranged coaxially with the axle suspended on the chassis and has the largest vertical amplitude when dust is stored in the dust storage box, so the signal blocking part is fixed on this differential carrier By doing so, the judgment precision of dust overloading or a predetermined set amount becomes high.

  Further, it is desirable that the transmitter and the receiver are fixed to the inside of the chassis of the arm drawn out from the inside of the chassis, and the arm is fixed to the outside of the chassis so that the vertical position can be adjusted. As a result, the vertical position of the arm can be adjusted from the outside of the chassis, and the vertical position of the transmitter and receiver provided on the chassis side can be adjusted. The setting position corresponding to can be adjusted.

  In addition, the arm may be pulled out from the inside of the chassis through the frame of the dust container box fixed on the chassis and fixed to the outside of the frame of the dust container box by a level adjusting bolt. desirable. Accordingly, it is possible to easily adjust the vertical position of the transmitting unit and the receiving unit from the outside of the chassis by the level adjustment bolt.

  Further, the transmitter and the receiver are fixed side by side on the arm, and the reflection unit that reflects the signal is fixed to the chassis side at a position separated from the transmitter and the receiver, and the signal blocking unit is the transmitter and It is desirable to intervene between the receiving unit and the reflecting unit. Thereby, it is possible to adjust the setting position corresponding to the judgment reference of overloading of dust or a predetermined set amount only by adjusting the vertical position of the arm from one side of the chassis.

  Alternatively, one of the transmitting unit or the receiving unit is fixed to the arm, and the other receiving unit or the transmitting unit is fixed to the chassis side at a position separated from the transmitting unit or the receiving unit fixed to the arm. It is desirable that Even with such a configuration, it is possible to adjust the set position corresponding to the judgment reference of overloading of dust or a predetermined set amount only by adjusting the vertical position of the arm from one side of the chassis.

(1) In a garbage truck with an axle suspended from a chassis, a transmitter provided on the chassis side for transmitting a predetermined signal, and a receiver provided on the chassis side for receiving a signal transmitted by the transmitter. And a signal blocking unit for blocking the signal by intervening on the signal transmission path, so that the weight is increased by accommodating the dust in the garbage collecting vehicle, and the relative position between the axle and the chassis is changed. By detecting that the relative position between the axle and the chassis has entered a predetermined setting position corresponding to the judgment standard of dust overloading or a predetermined setting amount, dust overloading or a predetermined setting with a simple structure The amount can be detected. Further, in this structure, since there is no contact when dust is overloaded or when a predetermined set amount is detected, there is no influence on the traveling of the dust collecting vehicle, and handling is easy.

(2) The signal blocking unit is fixed on the differential carrier having the largest vertical amplitude when the dust is stored in the dust storage box, so that the dust can be overloaded or a predetermined set amount can be determined. It becomes possible to carry out with high precision.

(3) The transmitter and the receiver are fixed to the inside of the chassis of the arm pulled out from the inside of the chassis, and the arm is fixed so that the vertical position can be adjusted outside the chassis. Since the vertical position of the transmitter and receiver fixed to the arm can be adjusted from the outside, the dust can be overloaded from the outside of the chassis without being submerged inside, or a criterion for determining the predetermined set amount It is possible to easily adjust the setting positions of the axle and the chassis corresponding to.

(4) The arm is pulled out from the inside of the chassis through the frame of the dust container box fixed on the chassis, and is fixed to the outside of the frame of the dust container box by a level adjusting bolt. Thus, it is possible to easily adjust the vertical position of the transmission unit and the reception unit from the outside of the chassis by the level adjustment bolt.

(5) The transmitting unit and the receiving unit are arranged and fixed on the arm, and the reflection unit that reflects the signal is fixed to the chassis side at a position separated from the transmitting unit and the receiving unit, and the signal blocking unit is configured as the transmitting unit. And by interposing between the receiving unit and the reflecting unit, it is possible to easily adjust the vertical position of the arm from one side of the chassis and easily correspond to the judgment standard of dust overload or a predetermined set amount The position can be adjusted.

(6) One of the transmitting unit or the receiving unit is fixed to the arm, and the other receiving unit or the transmitting unit is fixed to the chassis side at a position separated from the transmitting unit or the receiving unit fixed to the arm. Therefore, it is possible to easily adjust the setting position corresponding to the judgment reference for the overloading of the dust or the setting amount only by adjusting the vertical position of the arm from one side of the chassis.

  1 is a plan view of a garbage truck according to an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a rear view, FIG. 4 is an enlarged view of a sensor unit of a load weight warning device, and FIG. 4A is an enlarged view of FIG. 4, (b) is a left side view of (a), FIG. 6 (a) is an enlarged view of B of FIG. 4, (b) is a left side view of (a), and FIG. FIG.

  1 to 3, a garbage collection vehicle 1 according to an embodiment of the present invention includes a cab 2, a dust storage box 3, and a dust input box 4 mounted on a chassis 5. . The chassis 5 includes a pair of left and right chassis frames 5a and 5b that extend along the vehicle body longitudinal direction on both sides in the vehicle body width direction, a cross member (not shown) that connects the left and right chassis frames 5a and 5b in the vehicle body width direction, and the like. Are integrally formed.

  An axle (not shown) of the rear wheel 6 is suspended from the chassis 5 by a leaf spring 8 together with a differential carrier 7 in which a differential gear (not shown) for transmitting the driving force of the prime mover to the rear wheel 6 is accommodated. Yes. As shown in FIG. 4, a pair of left and right frames 9 a and 9 b extending along the chassis frames 5 a and 5 b of the chassis 5 are provided on the lower surface of the dust container box 3 on both sides in the vehicle body width direction. The frames 9a and 9b are fixed on the chassis frames 5a and 5b via the cushioning material 10, respectively.

  An infrared sensor 11 is provided on the inner side of one frame 9a, that is, on the center portion side of the vehicle body. The infrared sensor 11 includes a transmitter (not shown) that transmits an infrared signal as a predetermined signal and a receiver (not shown) that receives the infrared signal. Inside the other frame 9b, a reflecting plate 21 as a reflecting portion is provided at a position facing the infrared sensor 11. Usually, the infrared signal transmitted from the infrared transmission part of the infrared sensor 11 is reflected by the reflecting plate 21 and received by the infrared detection part of the infrared sensor 11.

  As shown in FIG. 5, the infrared sensor 11 is fixed to an arm 13 that passes through an opening 12 formed in the frame 9a and is drawn out from the inside of the frame 9a. A level adjusting bolt 14 is fixed to the outside of the frame 9 a of the arm 13. The level adjusting bolt 14 is fixed to the stay 15 fixed to the outside of the frame 9a by tightening the wing nuts 16a and 16b from above and below. Since the infrared sensor 11 is fixed inside the frame 9a of the arm 13, the vertical position thereof can be adjusted by changing the tightening position of the wing nuts 16a and 16b outside the frame 9a.

  As shown in FIG. 6, the reflecting plate 21 is provided at a position facing the infrared sensor 11 inside the frame 9 b, but the reflection range is an adjustable range of at least the vertical position of the infrared sensor 11. . A cylindrical protective cover 22 is provided around the reflecting plate 21 to prevent dust from adhering.

  A signal blocking unit 31 is provided on the differential carrier 7. The signal blocking section 31 is formed by an L-shaped cam 33 (see FIG. 7) fixed to a stay 32 standing on the differential carrier 7 so that the position in the vertical direction can be adjusted. When dust is accommodated in the dust container 3 and the weight increases, the chassis 5 is lowered, and the relative position between the axle and the chassis 5, that is, the relative position between the differential carrier 7 and the chassis 5 becomes closer. When the relative position between the differential carrier 7 and the chassis 5 enters a predetermined setting position corresponding to the criteria for determining whether dust is overloaded, the signal blocking unit 31 connects the infrared sensor 11 and the reflecting plate 21. The infrared signal is interrupted by intervening on the transmission path of the infrared signal so that the infrared signal transmitted from the infrared sensor 11 does not return to the infrared sensor 11.

  FIG. 8 shows a circuit diagram of the load weight warning device. In FIG. 8, 40 is a switch (SW) for turning on / off the operation of the load weight warning device, 41 is a pilot lamp indicating the operation state of the load weight warning device, and 42 is a notification unit for generating a warning sound. The buzzer 43 is a break type relay. The switch 40, the pilot lamp 41, the buzzer 42 and the relay 43 are provided in the cab 2. As shown in FIG. 8, when the switch 40 is turned on, the pilot lamp 41 is lit, and the pilot lamp 41 is lit to notify that the load weight warning device is in operation.

  And if a weight increases by storing a dust in the dust storage box 3 of the garbage collection vehicle 1, the relative position of the differential carrier 7 and the chassis 5 will change. Then, when the relative position between the differential carrier 7 and the chassis 5 enters a setting position corresponding to the criterion for overloading the dust, the infrared signal transmitted from the transmission unit of the infrared sensor 11 is blocked by the signal blocking unit 31. Thus, it does not reach the receiving unit of the infrared sensor 11. Then, when the infrared sensor 11 is cut off, the contact of the relay 43 is closed, the buzzer 42 is turned on, and a warning sound is emitted from the buzzer 42.

  On the other hand, when the dust is not overloaded, the relative position between the differential carrier 7 and the chassis 5 is not in the set position corresponding to the determination standard for dust overloading. The signal is not blocked by the signal blocking unit 31, is reflected by the reflecting plate 21, reaches the receiving unit of the infrared sensor 11, and is detected. At this time, since the contact of the relay 43 is open, the buzzer 42 does not operate.

  In the present embodiment, the relative position between the differential carrier 7 and the chassis 5 is set as a setting position where the infrared sensor 11 detects a position corresponding to the determination criterion of dust overloading. It can be arbitrarily set by adjusting the vertical position and the vertical position of the arm 13 to which the infrared sensor 11 is fixed. Therefore, it is possible to detect the dust weight by setting a predetermined set amount corresponding to the arbitrary dust weight.

  Further, in the present embodiment, the signal blocking unit 31 moves off the infrared signal transmission path and passes the infrared signal until the relative position between the differential carrier 7 and the chassis 5 enters a predetermined setting position. When the relative position between the chassis 7 and the chassis 5 enters a predetermined setting position, the infrared signal is interrupted by intervening on the infrared signal transmission path. On the contrary, the differential carrier 7 and the chassis 5 are blocked. Until the relative position of the differential carrier 7 enters a predetermined setting position, the infrared signal is interrupted by intervening on the transmission path of the infrared signal, and when the relative position between the differential carrier 7 and the chassis 5 enters the predetermined setting position, the infrared signal is transmitted. It is also possible to adopt a configuration in which an infrared signal passes through the signal transmission path. In this case, a make type can be used as the relay 43.

  In this case, when the infrared signal is interrupted, the notification by the buzzer 42 is not performed, and when the infrared signal is detected, the notification by the buzzer 42 is performed to notify the operator of overloading. Note that the notification of overloading may be performed by turning on or blinking a lamp in addition to the buzzer 42. Moreover, the notification by this lamp should just notify according to the detection state of the infrared signal by a receiver, and it lights up until it becomes overloaded, and it blinks or turns off when it becomes overloaded. A configuration is also possible.

  In this embodiment, overload detection is performed using an infrared signal, but it is also possible to use visible light, laser light, sound waves, radio waves, or the like in addition to infrared light. Further, in the present embodiment, the infrared sensor 11 and the reflector 21 are arranged to face each other, but it is also possible to arrange a transmitter on one frame 9a and a receiver on the other frame 9b. It is. In short, it suffices if the signal can be interrupted according to the relative position of the axle and the chassis 5 while a predetermined signal is transmitted from the transmitter and received by the receiver. It is also possible to freely set a pattern of a signal to be transmitted.

  Further, in the garbage truck 1 in this embodiment, the signal blocking unit 31 is fixed on the differential carrier 7, but can be fixed at another position on the axle side suspended from the chassis 5. is there. Normally, the differential carrier 7 is disposed coaxially with the axle suspended from the chassis 5 and has the largest vertical amplitude when dust is accommodated in the dust container 3. By fixing the signal blocking unit 31 on the differential carrier 7 as in the collection vehicle 1, the determination accuracy of dust overloading or a predetermined set amount is increased.

  Further, in the present embodiment, the infrared sensor 11 in which the transmitter and the receiver are integrated is fixed to the arm 13 and pulled out from the inside of the chassis 5. Since the vertical position is fixed by the wing nuts 16a and 16b so that the vertical position can be adjusted, the setting position corresponding to the judgment reference of the overloading of the dust or the predetermined set amount from the outside of the chassis 5 without entering the inside of the chassis 5 Can be easily adjusted.

  The refuse collection vehicle of the present invention is useful as a dust collection vehicle capable of preventing overloading of dust.

It is a top view of the refuse collection vehicle in embodiment of this invention. It is a side view of the refuse collection vehicle in embodiment of this invention. It is a rear view of the refuse collection vehicle in embodiment of this invention. It is an enlarged view of the sensor part of a loading weight warning device. (A) is A enlarged view of FIG. 4, (b) is a left view of (a). (A) is B enlarged view of FIG. 4, (b) is a left view of (a). It is C arrow line view of FIG. It is a circuit diagram of a loading weight warning device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust collection truck 2 Driver's cab 3 Dust storage box 4 Dust input box 5 Chassis 5a, 5b Chassis frame 6 Rear wheel 7 Differential carrier 8 Leaf spring 9a, 9b Frame 10 Buffer material 11 Infrared sensor 12 Opening part 13 Arm 14 For level adjustment Bolt 15 Stay 16a, 16b Wing nut 21 Reflector 22 Protective cover 31 Signal blocking part 32 Stay 33 Cam 40 Switch 41 Pilot lamp 42 Buzzer 43 Relay

Claims (4)

In a garbage truck with an axle suspended on the chassis,
Level adjusting bolts that are pulled out from the inside of the chassis through the frame of the dust storage box fixed on the chassis and can be adjusted in the vertical position outside the chassis. An arm fixed by
Is fixed to the position on the inner side of the chassis of the arm, and a transmitting unit for transmitting a predetermined signal,
A receiving unit is fixed to the position on the inner side of the chassis of the arm, to receive the signal transmitted by the transmitting unit,
It is fixed on the differential carrier on the axle side , and the signal is passed off the transmission path of the signal until the relative position between the axle and the chassis enters a predetermined setting position. A signal blocking unit for blocking the signal by intervening on the transmission path of the signal when the relative position enters a predetermined setting position;
A garbage collection vehicle comprising: a notification unit that notifies in accordance with a detection state of the signal by the reception unit. In a garbage truck with an axle suspended on the chassis,
Level adjusting bolts that are pulled out from the inside of the chassis through the frame of the dust storage box fixed on the chassis and can be adjusted in the vertical position outside the chassis. An arm fixed by
Is fixed to the position on the inner side of the chassis of the arm, and a transmitting unit for transmitting a predetermined signal,
A receiving unit is fixed to the position on the inner side of the chassis of the arm, to receive the signal transmitted by the transmitting unit,
It is fixed on the differential carrier on the axle side , and the signal is cut off by intervening on the signal transmission path until the relative position between the axle and the chassis enters a predetermined setting position. A signal blocking unit that allows the signal to pass off the signal transmission path when the relative position of the signal enters a predetermined setting position;
A garbage collection vehicle comprising: a notification unit that notifies in accordance with a detection state of the signal by the reception unit. The transmitter and receiver are fixed side by side on the arm,
Further, a reflection part for reflecting the signal is fixed to the chassis side at a position separated from the transmission part and the reception part,
The garbage collection vehicle according to claim 1 or 2 , wherein the signal blocking unit intervenes between the transmitting unit and the receiving unit and the reflecting unit. One of the transmitter or the receiver is fixed to the arm,
The other receiver or transmitter unit, refuse collection vehicles according to claim 1 or 2 in which is fixed to the chassis side of a position remote from the transmitter unit or the receiver unit is fixed to the arm.

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