JPH07206104A - Safety equipment for waste collection equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] Avoiding the deterioration of the durability of the waste container due to overweight and the deterioration of the weighing accuracy and durability of the weight weighing device, and the weight of the waste container is always measured accurately. To guarantee that. In a safety device of a waste collection device that measures the weight of a waste container by a weight weighing device 19 in the process of lifting a waste container by a lifter, a maximum allowable weight of the waste container or a maximum allowable weight value of the weight weighing device 19 And comparators 71 and 73 for comparing the weight of the waste container weighed by the weight weighing device 19 are provided, and the weight of the waste container weighed by the weight weighing device 19 is equal to the maximum allowable weight of the waste container or the weight weighing device 19. When it is larger than the maximum allowable weight value, the lifter lifting operation is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a waste collection device, and more particularly to a safety device for a waste container overweight of a waste container in a waste collection device of a type in which a lifter is hydraulically driven to lift the waste container. .

[0002]

2. Description of the Related Art A waste container (container) for storing waste is detachably mounted for collecting charges such as dust and the like by weight, and a lifter for lifting the waste container for discarding the stored contents is provided. There is known a waste collection device that measures the weight of the waste container by a weight measuring device during the lifting process of the waste container by the lifter.

This waste collection device is disclosed in Japanese Patent Laid-Open No. 61-215.
As disclosed in Japanese Patent Laid-Open No. 923 and Japanese Patent Laid-Open No. 5-72023, in many cases, a waste collection work vehicle is used for mobile collection of waste, and a waste container placed on the ground is used as a vehicle lifter. , Lift it upside down and invert the waste in the waste container into the vehicle-mounted waste collection bucket and discharge it.
The operation of lowering the empty waste container by the lifter and returning the waste container to the ground is all powered by using hydraulic pressure, etc., and lifting the waste container by the lifter by the weight measuring device such as the load cell installed in the lifter. Weigh the waste container during the process and the descent process. The net waste collection weight is calculated by subtracting the container weight weighed in the lowering process from the container weight weighed in the lifting process.

[0004]

The waste container is generally composed of a molded article such as plastics,
It has an inherent maximum allowable weight that guarantees durability. For this reason, if the waste container in which the waste has been charged in excess of the allowable maximum weight is lifted by the lifter in the overweight state, the waste container is overloaded and its durability is reduced. This causes the waste container to be damaged within its useful life.

There is a limit to the weight that can be accurately weighed by a weight weighing device such as a load cell, and if the weight weighing exceeds the maximum allowable weighing value determined by the characteristics of the weight weighing device, the weighing device is weighed. Accuracy and durability are reduced. In addition, the weight value is not guaranteed when the weight exceeds the maximum allowable weight value of the weight weighing device. On the other hand, conventionally, there is no weight limit on the weight measurement of the waste container by the weight measuring device, and the weight of the waste container despite the fact that the weight of the waste container exceeds the maximum allowable weight value of the weight measuring device. The weight of the waste container may be measured by the weighing device. This not only lowers the weighing accuracy and durability of the weight weighing device, but also makes it impossible to collect charges commensurate with the weight of the waste in the weight-based charge collection of the waste.

The present invention has been made by paying attention to the above-mentioned problems, and it is possible to reduce the durability of the waste container due to the excess weight of the waste container and the weighing accuracy and durability of the weight weighing device. It is an object of the present invention to provide a safety device for a waste collection device which avoids and also guarantees that the weight of the waste container is always accurately measured.

[0007]

In order to achieve the above-mentioned object, the safety device of the waste collection device according to the present invention is detachably mounted with a waste container for storing waste, and the waste container is disposed for discarding the stored contents. In the safety device of the waste collection device that has a lifter that lifts the waste container and measures the weight of the waste container by the weight measuring device in the process of lifting the waste container by the lifter, the maximum allowable weight unique to the waste container and the weight measuring device The comparing means for comparing the weight of the waste container to be weighed, and the comparison result information inputted from the comparing means, and when the weight of the waste container weighed by the weight weighing device is larger than the maximum allowable weight of the waste container, And a control means for stopping the lifting operation of the lifter.

In the safety device of this waste collection device,
The waste container has an allowable maximum weight presenting section for presenting the allowable maximum weight of the waste container, and the comparing means is configured to input information indicating the allowable maximum weight of the waste container to be lifted from the allowable maximum weight presenting section. You may Further, in order to achieve the above-mentioned object, the safety device of the waste collection device according to the present invention has a lifter for detachably mounting a waste container for storing the waste and lifting the waste container for discarding the stored contents. In the safety device of the waste collection device that measures the weight of the waste container by the weight weighing device during the lifting process of the waste container by the lifter, the maximum allowable weight value of the weight weighing device and the weight of the waste container weighed by the weight weighing device. And the comparison result information is input from the comparison means, and the lifter is lifted when the weight of the waste container weighed by the weight weighing device is larger than the maximum allowable weighing value of the weight weighing device. And a control means for stopping the operation.

In order to achieve the above object, a safety device for a waste collection device according to the present invention is a hydraulic lifter in which a waste container for storing waste is detachably mounted and which lifts the waste container for discarding the stored contents. In the safety device of the waste collection device that weighs the waste container by the weight weighing device in the process of lifting the waste container by the hydraulic lifter, the hydraulic pressure supplied to the hydraulic actuator that lifts and drives the hydraulic lifter It has a hydraulic relief means for setting a maximum value, the hydraulic relief means is set a relief pressure according to the maximum allowable weighing value of the weight weighing device, the hydraulic lifter is from the maximum allowable weighing value of the weight weighing device. The hydraulic relief means operates in hydraulic relief when attempting to lift a heavy waste container. It is.

[0010]

[Operation] According to the above configuration, the comparison means compares the maximum allowable weight of the waste container with the weight of the waste container weighed by the weight weighing device, and the waste weighed by the weight weighing device is compared. When the weight of the container is larger than the maximum allowable weight of the waste container, the lifting operation of the lifter is forcibly stopped by the control means.

Further, the comparison means compares the maximum allowable weighing value of the weight weighing device with the weight of the waste container weighed by the weight weighing device, and the weight of the waste container weighed by the weight weighing device is determined by the weight weighing device. When it is larger than the maximum allowable weight value, the lifting operation of the lifter is forcibly stopped by the control means. Further, in the waste collection device having the hydraulic lifter, when the hydraulic lifter tries to lift a waste container having a waste storage weight larger than the maximum allowable weighing value of the weight weighing device, the hydraulic pressure supplied to the hydraulic actuator of the hydraulic lifter is reduced. When the maximum value, that is, the relief pressure of the hydraulic relief means is reached, the hydraulic relief means performs a hydraulic pressure relief operation, and this hydraulic pressure relief operation prevents the hydraulic pressure supplied to the hydraulic actuator from further increasing. Lifting action does not start.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment in which a safety device for a waste collection device according to the present invention is applied to a waste collection work vehicle. The waste collection work vehicle has a cab 3 in front of the traveling body 1 and a waste collection bucket 5 behind the cab 3. The waste collection bucket 5 is composed of a bucket main body 7 fixedly arranged on the traveling body 1 and a waste input hopper 9 attached to the rear portion of the bucket main body 7 so as to be capable of being flipped open, and the rear side of the waste input hopper 9 is a waste input port 11. Has become.

A hydraulic lifter 13 is provided at the rear end of the waste input hopper 9. As shown in FIG. 2, the hydraulic lifter 13 has a lifter mount member 17 supported by a waste input hopper 9 by a pivot 15, and the lifter mount member 17 has a weight measuring device 19 such as a load cell.
The lifter base 21 is attached by. The lifter base 21 is a lifter mount member 1 centered on the pivot 15.
By manual rotation of 7, the unwinding position located behind the waste input hopper 9 as shown by the solid line in FIG. 2 and the waste input hopper 9 as shown by the phantom line in FIG. It is rotatable and displaceable between itself and the storage position.

The lifter base 21 is stored in the storage position for traveling safety during traveling of the waste collection work vehicle, and is extended to the extension position during normal waste collection work. Therefore, particularly in the following description, Unless otherwise noted, the lifter base 21 is assumed to be located at the feeding position. A lifter plate 27 is attached to the lifter base 21 by a main link 23 and a sub link 25. One end of each of the main link 23 and the sub-link 25 is pivotally connected to the lifter base 21 by pivots 29 and 33, and the other end is pivoted by the pivots 31 and 35 to the lifter plate 27.
Is pivotally connected to the back of the.

The lifter plate 27 has a lowered position in which it is vertically erected as shown by the solid line in FIG.
As shown by the phantom line in FIG. 2, due to the rotational displacement of the main link 23 around the pivot 31 in the counterclockwise direction and the pivotal connection relationship with the lifter base 21 by the sub-link 25. In addition, it is possible to displace between the reversing and rising position, which is tilted and reversed to the front with a tilt angle of about 45 degrees with respect to the horizontal plane while rising.

A hydraulic cylinder device 39 for driving the lifter is attached to the lifter base 21 by a pivot 37. The hydraulic cylinder device 39 pivotally connects the pistunt rod 41 to an intermediate portion of the main link 23 by a pivot shaft 43, and pivots the main link 23 to reciprocally drive the lifter plate 27 between the lowering position and the reverse raising position. It is driven to rotate around 29.

A fixed hook 45 is fixedly mounted on the upper side of the rear surface (front surface) of the lifter plate 27 in the lowered position, and a movable hook 49 is rotatably provided on the lower side by a pivot shaft 47. One end of the movable hook 49 has a lifter base 2
In the case where the other end of the link 51 that is pivotally connected to 1 and includes a spring (not shown) for absorbing the displacement difference in the middle is pivotally connected, and the movable hook 49 has the lifter plate 27 in the lowered position. 2 is located at the release position shown by the solid line in FIG. 2, and is shown by the phantom line in FIG. 2 by the displacement operation by the link 51 as the lifter plate 27 moves from the lowered position to the reversal raised position. Reversibly moves to the engagement position.

As shown in FIGS. 2 and 3, the waste container 53 has a box-shaped container body 55 of an upward opening type into which waste such as dust is thrown inside in a standing posture, and a container body 55. A lid 56 that can be opened and closed on the upper part of the
And a traveling wheel 57 provided on the lower portion of the container body 55, and is configured as a hand cart, and has a recessed upper engaging portion 59 formed on the side of an engaging surface portion with the lifter plate 27 and the fixed hook 45. Engage in a disengageable manner. Further, the engaging bar 6 is provided on the engaging surface side of the waste container 53 with the lifter plate 27.
1 is fixedly mounted, and a movable hook 49 engages with the engagement bar 61 in a disengageable manner.

A data carrier antenna 63 is provided on the lifter plate 27, and the antenna 63 is connected to a signal processing device 65 (see FIG. 4) separately installed in the operator's cab 3 or the like. An ID tag 67 is fixedly mounted on the surface of the waste container 53 that engages with the lifter plate 27. The ID tag 67 includes a storage unit for storing ID information unique to each waste container 53 and allowable maximum weight (load bearing information), and the waste container 5.
3 is composed of a read / write type data carrier having an information writing unit in which the usage history of No. 3 is written. When the waste container 53 is attached to the hydraulic lifter 13, the ID tag 67 communicates with the antenna 63 in a contactless manner and presents the maximum allowable weight of the waste container 53 with numerical information. The information transmission method of this data carrier may be an electromagnetic induction method, a microwave method, etc., and the read / write type data carrier forming the ID tag 67 may be a battery-less type using an EEPROM or the like.

FIG. 4 shows an embodiment of the control system of the waste collection apparatus including the safety device according to the present invention. This control system
It has a signal processing device 65, a weight calculation device 69, two comparators 71 and 73, and a hydraulic circuit 75. The signal processing device 65 is connected to the antenna 63 and serves as a reader / writer of a data carrier, reads the received signal of the ID tag 67 of the waste container 53 attached to the hydraulic lifter 13, and transmits the signal to the ID tag 67. Output processing of signals (writing signals), reading processing of signals from the weight calculation device 69, identification processing of various signals, output processing of data output to the handy terminal 77 for collecting data connected to the connector, and warning lamp 79. And the output process of the operation command of the buzzer 81.

In this case, the signal processing device 65 has the ID tag 67 of the waste container 53 attached to the hydraulic lifter 13.
A signal indicating the maximum allowable weight of the waste container 53 is captured. The weight calculation device 69 inputs a weight measurement value signal from the weight measurement device 19 in each of the lifting process and the lowering process of the waste container 53 by the hydraulic lifter 13, and the container weight measured in the lifting process is measured in the lowering process. The net waste collection weight is calculated by subtracting the container weight, and a signal indicating the net waste collection weight is output to the signal processing device 65 together with the weight measurement value signal.

The comparator 71 uses the maximum allowable weight of the waste container 53 taken in by the signal processing device 65 as a comparison reference value, and inputs a weight measurement value signal from the weight measuring device 19 as a comparison value during the lifting process of the waste container 53. If the weight (measured value) of the waste container 53 weighed by the weight weighing device 19 exceeds the maximum allowable weight of the waste container 53, an operation stop command is output to the hydraulic circuit 75 as the comparison result information and the warning lamp 79 is output. And the operation command of the buzzer 81 are output.

The other comparator 73 uses the maximum permissible weighing value of the weight weighing device 19 set in the maximum permissible weighing value setting section 83 as a reference value for comparison, and outputs the weight from the weight weighing device 19 during the lifting process of the waste container 53. When the weight measurement signal is input as a comparison value and the weight (measurement value) of the waste container 53 measured by the weight measurement device 19 exceeds the maximum allowable measurement value of the weight measurement device 19, an operation stop command is issued as comparison result information. In addition to outputting to the hydraulic circuit 75, it outputs a warning lamp 79 lighting command and a buzzer 81 operation command.

The hydraulic circuit 75 includes a hydraulic cylinder device 39,
The operation of 51, that is, the operation of the hydraulic lifter 13 is controlled. When an operation stop command is input from the comparator 71 or 73, the lifting operation of the hydraulic lifter 13 is stopped and the hydraulic lifter 13 is returned to the original lowered position. Perform a return operation. Next, the operation of the waste collection device having the above-mentioned configuration will be described.

When collecting the wastes thrown into the waste container 53, the upper engaging portion 59 of the waste container 53 in the upright posture (normal posture) is first placed with the lifter plate 27 in the lowered position. Fixed hook 45 of lifter plate 27
Are hooked and engaged as shown in FIG. At this point, the ID tag 67 of the waste container 53 faces the antenna 63, and the ID tag 67 indicates the I of the waste container 53.
The antenna 63 receives the D information and the signal indicating the maximum allowable weight. The received maximum allowable weight is set as the comparison reference value of the comparator 71 by the signal processing device 65.

After completion of the hooking engagement, when an operator pushes an up operation button (not shown) provided on the outer wall of the waste throwing hopper 9, the hydraulic cylinder device 39 causes the main link 23 to move around the pivot 29. The lifter plate 27 is rotationally driven counterclockwise in 2 to move the lifter plate 27 from the lowered position to the inverted raised position. With the movement of the lifter plate 27, the movable hook 49 is pivotally displaced from the released position to the engagement position, and the movable hook 49 is hooked and engaged with the engagement bar 61 of the waste container 53. As a result, the waste container 53 is locked to the lifter plate 27.

When the waste container 53 is lifted from the lowering position and turned upside down and is positioned at the reverse rising position, the waste, which is the stored material in the moving waste container 53, falls into the waste input hopper 9 and the inside of the bucket body 7. To be collected. The weight measuring device 19 measures the weight of the waste container 53 at the initial stage of the lifting process of the waste container 53 by the lifter plate 27 (when the waste container 53 is lifted above the ground). This weight measurement is referred to as waste storage weight measurement.

The weight value of the waste storage weight measurement is immediately input to the weight calculation device 69 and the comparator 7
It is also input to 1, 73, and the comparators 71, 73 respectively compare the preset comparison reference value and the measured value. Comparator 7
When it is determined by the comparison operation 1 that the weight value, that is, the weight of the waste container 53 weighed by the weight weighing device 19 exceeds the maximum allowable weight of the waste container 53, an operation stop command is output to the hydraulic circuit 75. At the same time, a lighting command is output to the warning lamp 79 and an operation command is output to the buzzer 81.

As a result, the lifting operation of the hydraulic lifter 13 is urgently stopped, the returning operation of returning the hydraulic lifter 13 to the original lowered position is performed, the warning lamp 79 is turned on, and the buzzer 81 emits a buzzer sound. Further, when it is found by the comparison operation of the comparator 73 that the weight of the waste container 53 weighed by the weight weighing device 19 exceeds the maximum allowable weighing value of the weight weighing device 19, the operation stop command is issued in this case as well. 75 and the warning lamp 79
The lighting command is output to and the operation command is output to the buzzer 81.

As a result, the lifting operation of the hydraulic lifter 13 is urgently stopped, the returning operation of returning the hydraulic lifter 13 to the original lowered position is performed, the warning lamp 79 is turned on, and the buzzer 81 emits a buzzer sound. In either case, the warning lamp 7 is activated by pressing a reset button (not shown) after the completion of the return operation of the hydraulic lifter 13.
9 is turned off and the operation of the buzzer 81 is stopped.

When the down operation button is pressed after the completion of dropping and discharging the waste, the hydraulic cylinder device 39 drives the main link 23 to rotate around the pivot 29 in the clockwise direction in FIG. 2 and the lifter plate 27 to the reverse rising position. Move to a lower position. As a result, the empty waste container 53 descends and returns to the ground in the original standing posture.

The weight measuring device 19 is in the latter stage of the process of returning the waste container 53 by the lifter plate 27 (just before the waste container 53 is landed, and this weighing position and the weighing position for waste storage weight measurement are at the same position. May be)
At, the weight of the waste container 53 is measured, and the measured value is output to the weight calculation device 69. This weighing is called empty weighing.

The weight calculation device 69 calculates the net waste collection weight by subtracting the empty weight measurement value from the waste accommodation weight measurement value, and outputs the calculation result to the signal processing device 65 together with the weight measurement value data. The signal processing device 65 inputs the weight measurement value data and the net waste collection weight data from the weight calculation device 69, outputs the data to the ID tag 67 of the waste container 53, and outputs the data to the connector-connected handy terminal 77. Execute the process.

The waste collection weight calculation may be simplified by omitting the empty weight measurement and subtracting the standard empty weight of the waste container 53 from the measurement value of the waste storage weight measurement.
In this case, even if the standard empty weight of the waste container 53 is preset, by reading the standard empty weight data from the ID tag 67 of the waste container 53, each waste container 53 can be read.
It may be set for each. Further, the calculation may be performed by a host computer that downloads the data written in the handy terminal 77.

As a result, a signal indicating the net waste collection weight is transmitted from the antenna 63 to the ID tag 67, and the ID tag 6
The net waste collection weight of this time is written in 7, and the weight measurement value and the net waste collection weight of this time are stored in the storage unit of the handy terminal 77 together with the ID information of the waste container 53, the collection date and time, and the like. The signal processing device 65
According to a preset rule, when the net waste collection weight signal is not correctly input, the error processing is performed.
As a result, the warning lamp 79 lights up and the buzzer 81
Makes a buzzer sound.

FIG. 5 shows an embodiment of a hydraulic circuit incorporating a safety device for a waste collection device according to the present invention. Figure 5
Shows an excerpt of the part that supplies and discharges hydraulic pressure to and from the hydraulic cylinder device 39 for driving the lifter.
Oil reservoir 101, oil pump 103, three-position solenoid switching valve 105, and relief valve 107.
And the oil passage 10 for supplying and discharging hydraulic pressure to and from the hydraulic cylinder device 39.
9 has a supply hydraulic pressure flow rate setting unit 111 and a discharge hydraulic pressure flow rate setting unit 113 which are provided in the middle of 9.

The electromagnetic switching valve 105 is used in the hydraulic cylinder device 3.
9 has a hydraulic pressure supply position for supplying hydraulic pressure, a neutral position in a valve closed state, and a hydraulic discharge position for discharging hydraulic pressure from the hydraulic cylinder device 39, and is switched by energization control for the solenoids 115, 117. Operate. Accordingly, by controlling the energization of the solenoids 115 and 117, the hydraulic pressure is supplied to and discharged from the hydraulic cylinder device 39, and the hydraulic lifter 13 moves up and down to be controllable from the outside.

The relief valve 107 is the weight measuring device 19
The relief pressure is set according to the maximum allowable measured value of, and when the oil pressure in the oil passage 109 exceeds the relief pressure, the valve is opened to allow the oil pressure to escape (relief operation). Waste container 53 by hydraulic lifter 13
Since the hydraulic pressure supplied to the hydraulic cylinder device 39 increases according to the weight of the waste container 53 when the
When the hydraulic lifter 13 tries to lift the waste container 53 having a weight larger than the maximum allowable weighing value of the weight weighing device 19, the oil pressure in the oil passage 109 is used as back pressure and the relief valve 107 is used.
And the relief valve 107 operates to release the hydraulic pressure.

As a result, the hydraulic pressure of the hydraulic cylinder device 39 is prevented from further increasing, the hydraulic cylinder device 39 does not substantially operate, and the lifting of the waste container 53 by the hydraulic lifter 13 is not started. In addition,
In the above-mentioned embodiment, the maximum allowable weight of the waste container 53, which is the comparison reference value of the comparator 71, is the maximum weight of each waste container 5.
3 is set by reading the data from the ID tag 67 provided in the waste container 53 each time waste is collected, as long as the maximum allowable weight of the waste container 53 is standardized for each type. The standard code may be read from the ID tag 67, the signal processing device 65 may obtain the maximum allowable weight corresponding to the standard code by a table lookup method, and may be set as the comparison reference value of the comparator 71.

The maximum allowable weight of each waste container 53 is not limited to the electric signal output by the ID tag 67, and the bar code read on the waste container 53, the magnetic sensing of the magnet, and the waste container are displayed. 53
It may be performed by identifying the shape. Further, when only the waste containers 53 having the same maximum allowable weight are used, the comparison reference value of the comparator 71 may be uniquely defined in advance.

[0041]

As can be understood from the above description, according to the safety device of the waste collecting apparatus of the present invention, when the weight of the waste container measured by the weight measuring device is larger than the maximum allowable weight of the waste container, Since the lifting operation of the lifter is stopped, the deterioration of the durability of the waste container due to the excess weight of the waste container is avoided, and the durability of the waste container is secured.

When the data indicating the allowable maximum weight of the waste container presented by the waste container is fetched by the ID tag and set as the comparison reference value of the comparing means, the maximum allowable weight unique to each waste container is set. Therefore, even if the comparison reference value of the comparison means is accurately and automatically switched and a plurality of types of waste containers having different allowable maximum weights are mixedly used, no problem occurs.

If the weight of the waste container weighed by the weight weighing device is larger than the maximum allowable weighing value of the weight weighing device, the lifting operation of the lifter is stopped. The weight of the waste container that has exceeded the weight is no longer measured, and the deterioration of the weighing accuracy and durability of the weight weighing device is avoided,
It ensures that the weight of waste containers is always weighed with guaranteed accuracy.

Further, in the waste collecting apparatus having the hydraulic lifter, when the lifting of the lifter is stopped by the hydraulic relief operation of the hydraulic relief means such as the relief valve,
The purpose can be achieved very simply by only incorporating a relief valve of ordinary structure in the hydraulic circuit of the hydraulic lifter.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment in which a safety device for a waste collection device according to the present invention is applied to a waste collection work vehicle.

FIG. 2 is a side view showing a hydraulic lifter of a waste collection device to which the safety device according to the present invention is applied.

FIG. 3 is a front view of a waste container used in a waste collection device to which the safety device according to the present invention is applied.

FIG. 4 is a block diagram showing an embodiment of a control system of a waste collection device including a safety device according to the present invention.

FIG. 5 is a hydraulic circuit diagram showing an embodiment of a hydraulic circuit incorporating a safety device for a waste collection device according to the present invention.

[Explanation of symbols]

1 ... traveling body, 3 ... operator's cab, 5 ... waste collection bucket, 7 ...
Bucket body, 9 ... Waste input hopper, 13 ... Hydraulic lifter, 17 ... Lifter mount member, 19 ... Weight measuring device,
21 ... Lifter base, 23 ... Main link, 25 ... Sub link, 27 ... Lifter plate, 39 ... Hydraulic cylinder device, 4
5 ... Fixed hook, 49 ... Movable hook, 53 ... Waste container, 63 ... Data carrier antenna, 65 ... Signal processing device, 67 ... ID tag, 69 ... Weight calculation device, 71 ... Comparator, 73 ... Comparator, 75 ... hydraulic circuit, 105 ... electromagnetic switching valve, 107 ... relief valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuzo Fukuo 3-2-43 Shirute, Tsurumi-ku, Yokohama-shi, Kanagawa Shinmeiwa Kogyo Co., Ltd. Specially-equipped vehicle division (72) Inventor, Koatsu Sato 3-Azuma, Tsukuba, Ibaraki 18-4 (72) Inventor Kazuhiro Fukada 2-16-2 East, Tsukuba City, Ibaraki Prefecture (72) Inventor Masakazu Kakuyama 13-13 Shinashiya, Suita City, Osaka Prefecture

Claims (4)

[Claims] 1. A waste container for detachably mounting a waste container, the lifter having a lifter for lifting the waste container for discarding the stored contents, and a waste container by a weight measuring device in the process of lifting the waste container by the lifter. In the safety device of the waste collection device that weighs the weight of the waste container, the comparison means compares the maximum allowable weight unique to the waste container with the weight of the waste container weighed by the weight weighing device, and the comparison result information from the comparison means. And a control means for stopping the lifting operation of the lifter when the weight of the waste container weighed by the weight weighing device is larger than the maximum allowable weight of the waste container. Safety device for collection device. 2. The waste container has an allowable maximum weight presenting section for presenting the allowable maximum weight of itself, and the comparing means inputs information indicating the allowable maximum weight of the waste container to be lifted from the allowable maximum weight presenting section. The safety device for a waste collection device according to claim 1, wherein: 3. A waste container, which is detachably attached to hold a waste, and has a lifter for lifting the waste container for discarding the waste, wherein the weight container is used by a weight weighing device in the process of lifting the waste container by the lifter. In the safety device of the waste collection device for weighing the weight of, the comparison means for comparing the maximum allowable weight value of the weight weighing device and the weight of the waste container weighed by the weight weighing device, and the comparison result information from the comparison means. And a control means for stopping the lifting operation of the lifter when the weight of the waste container weighed by the weight weighing device is larger than the maximum allowable weighing value of the weight weighing device. The safety device of the characteristic waste collection device. 4. A waste container that accommodates waste is detachably mounted, and a hydraulic lifter that lifts the waste container for discarding the stored contents is provided, and the weight is measured in the process of lifting the waste container by the hydraulic lifter. In a safety device of a waste collection device that weighs the weight of a waste container by means of a device, the device has a hydraulic relief means for setting a maximum value of hydraulic pressure supplied to a hydraulic actuator for lifting and driving the hydraulic lifter, and the hydraulic relief means is The relief pressure is set according to the maximum allowable weighing value of the weight weighing device, and the hydraulic relief means operates when the hydraulic lifter attempts to lift a waste container having a weight larger than the maximum allowable weighing value of the weight weighing device. A safety device for a waste collection device, which is characterized by a hydraulic relief operation.