JP4361166B2 - Dust weight measuring device for garbage truck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for measuring the weight of dust loaded on a garbage truck, and more specifically, between a state in which a weighing platform for measuring the weight of dust is stored below the vehicle body and a state in which the weighing platform is grounded to the rear of the vehicle body. The present invention relates to a compact dust weight measuring apparatus that can be moved up and down and can be easily attached to an existing garbage truck.
[0002]
[Prior art]
In the case of paid dust collection work, we charge the cost based on the weight of the collected dust, so when we visit companies such as restaurants and convenience stores to collect the dust individually and individually It is necessary to measure accurately. However, if the weighing platform is taken in and out every time the weight of the dust is measured, the dust collection operation cannot be performed efficiently.
Therefore, a weight measuring device that measures the weight of the loaded dust by subtracting the weight of the worker from the weight measured when the worker holding the dust on the weighing platform has been proposed previously. (JP-A-9-170944).
[0003]
The structure of this dust weight measuring device will be outlined with reference to FIGS. 7 and 8. The loaded dust is put into the dust container 2 at the rear part of the dust container 2 mounted on the dust truck 1. A tailgate 3 is attached. Further, the weighing platform 7 includes a link 4 whose base end is pivotally supported on the lower portion of the tail gate 3 and a link 6 whose base end moves along a guide groove 5 formed on a side surface of the tail gate 3. Suspended. Further, a hydraulic cylinder 8 is interposed between the base end of the link 6 and the tailgate 3. Thereby, by extending and contracting the hydraulic cylinder 8, the weighing platform 7 can be moved up and down between the grounding state shown in FIG. 7 and the retracted state shown in FIG.
[0004]
[Problems to be solved by the invention]
However, this weight measuring device has a structure in which the weighing platform is moved up and down by displacing the support link 6 that suspends the weighing platform 7 along the guide groove 5 that is recessed in the side surface of the tailgate 3. As a result, in order to mount this weight measuring apparatus on an existing garbage truck, the guide groove 5 must be formed in the tailgate 3, which requires a significant modification.
[0005]
Moreover, in this weight measuring device, since the weighing platform is moved up and down by the operation of the support links 4 and 6 that suspend the weighing platform 7, it is necessary to make a large working space for the support links 4 and 6. . Thereby, this weight measuring device may be unable to retrofit and install an existing garbage truck.
[0006]
Accordingly, the object of the present invention is to eliminate the above-mentioned problems of the prior art and to raise and lower the weighing platform for measuring the weight of dust between the state where it is stored below the vehicle body and the state where it is grounded behind the vehicle body. Another object of the present invention is to provide a compact dust weight measuring device that can be easily attached to an existing garbage truck.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the dust weight measuring device of the garbage truck of the present invention is
A weighing platform for measuring the weight of the dust loaded on the garbage truck;
A support shaft that extends in the width direction of the body of the garbage truck and rotatably supports the weighing table;
The front end of the support shaft is connected to the end of the support shaft, the base end of the support shaft is pivotally supported by the vehicle body, and the support shaft is swingably supported in the front-rear direction of the vehicle body. Telescopic arm that raises and lowers between a retracted position below the vehicle body and a ground contact position behind the vehicle body,
The distal end of the telescopic arm is pivotally supported by the distal end, and the base end of the telescopic arm is pivotally supported by the vehicle body in front of the pivot point of the base end with respect to the vehicle body. A hydraulic cylinder that expands and contracts the telescopic arm by expansion and contraction;
Biasing means for constantly urged toward the support shaft to the rear side of the front Symbol vehicle body,
The weighing table is provided on the telescopic arm, and approaches the weighing table as the telescopic arm is shortened, presses the front end of the weighing table, and the rear end of the weighing table is raised by the pressing force. And a cam pin that rotates around the axis of the support shaft .
The hydraulic cylinder is
As a result of the shortening, the telescopic arm is swung toward the front side of the vehicle body against the urging force of the urging means, the telescopic arm is shortened to raise the measuring table, and the cam pin is used to lift the measuring table. Rotate the weighing platform so that the rear end rises and fix it in the retracted position,
By the extension, the telescopic arm can be extended to lower the weighing table, and the weighing table can be rotated around the axis of the support shaft and moved to the grounding position .
[0008]
The weighbridge may have a cam member which secure the engaging said weighbridge in a predetermined storage angles to said cam pin when the front Symbol flexible arm is shortened.
The urging means can be interposed between the vehicle body and the telescopic arm.
Further, the urging means extends fully when the weighing platform contacts the ground, swings the telescopic arm fully toward the rear side of the vehicle body, and positions the weighing table most on the rear side of the vehicle body.
At this time, the hydraulic cylinder further extends from a state in which the rear end portion of the weighing table is grounded, thereby moving the weighing table to the grounding position while lowering the front end portion of the weighing table.
[0009]
In the dust weight measuring apparatus of the dust collection vehicle of the present invention configured as described above, when the hydraulic cylinder is shortened, the telescopic arm swings in the forward direction while shortening, so the dust collection vehicle is raised while raising the weighing platform. It can be displaced to the vehicle body front direction side and can be fixed at the retracted position below the vehicle body.
On the other hand, when the hydraulic cylinder is extended, the extendable arm extends and the weighing platform descends, but the extendable arm is urged by the urging means and swings toward the rear of the vehicle body. It can be grounded while being displaced.
[0010]
That is, the dust weight measuring apparatus for a garbage truck according to the present invention moves the weighing table backward using the biasing means while supporting the weighing table with the hydraulic cylinder and the telescopic arm, and uses the cam member. Thus, the weighing platform is rotated by a predetermined angle.
Thereby, the compact dust weight measuring apparatus which does not take a working space widely like the conventional apparatus which raises / lowers and rotates a measuring stand by operation | movement of a pair of substantially parallel links can be provided.
In addition, since it is only necessary to pivotally support the telescopic arm, the hydraulic cylinder, and the base end of the urging means on the body of the garbage collection vehicle, the existing garbage collection vehicle can be easily modified and attached.
[0011]
The urging means can be interposed between the vehicle body and the telescopic arm, but can also be interposed between the vehicle body and the support shaft or between the vehicle body and the hydraulic cylinder.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a dust weight measuring apparatus for a garbage truck according to the present invention will be described with reference to FIGS. 1 to 6.
Here, FIG. 1 is a side view showing a state in which an embodiment of the dust weight measuring apparatus according to the present invention is attached to a garbage collection vehicle, and FIG. 2 is a diagram showing the dust weight measurement apparatus shown in FIG. FIG. 3 is an enlarged side view showing the dust weight measuring apparatus shown in FIG. 1, and FIG. 4 is a side view showing a state in which the weighing platform of the dust weight measuring apparatus shown in FIG. FIG. 5 is a side view showing a state in which the weighing table shown in FIG. 3 is grounded, and FIG. 6 is a side view showing the dust weight measuring device shown in FIG. 3 in a weight measurement state.
In the following description, the forward / backward direction of the garbage collection vehicle is referred to as the front / rear direction, and the vehicle body width direction of the garbage collection vehicle is referred to as the left / right direction.
[0013]
As shown in FIG. 1, the dust weight measuring apparatus 100 of the dust collection vehicle of this embodiment is attached to the lower part of the rear end of the tailgate 3 for putting dust into the dust container 2 mounted on the dust collection vehicle 1. .
[0014]
In the dust weight measuring apparatus 100, the weight of the dust loaded on the garbage truck 1 is measured using the weighing platform 10.
As shown in FIGS. 2 and 3, the weighing platform 10 is a box-shaped main body that contacts the ground G via a plurality of front support rollers 11 and rear support rollers 12 arranged in parallel in the vehicle body width direction. It has a portion 13, a load cell 14 installed in the main body portion 13, and a dust mounting plate 15 that loads the load cell 14 with a dust weight.
Thereby, the dust weight can be measured by placing the dust on the dust placing plate 15 in a state where the weighing table 10 is grounded to the ground G. Further, the weight of the dust can be calculated by subtracting the weight of the worker from the weight measured when the worker holding the dust in the hand rises on the weighing table 10.
[0015]
As shown in FIG. 2, the weighing platform 10 is supported by a support shaft 20 that extends horizontally in the left-right direction (vehicle body width direction), moves up and down integrally with the support shaft 20, and rotates around the axis of the support shaft 20. It is designed to rotate integrally.
The support shaft 20 is attached to the weighing table 10 in front of the position of the center of gravity in the front-rear direction of the weighing table 10 and does not rotate to the axis of the hydraulic cylinder 40.
Further, left and right end portions 21 and 22 of the support shaft 20 are respectively supported by a pair of left and right extendable arms 30 described later, and move up and down as the extendable arm 30 expands and contracts and move back and forth as the extendable arm 30 swings in the front and rear direction. It comes to move.
[0016]
As shown in FIG. 3, the telescopic arm 30 has a cylinder 31 and a slide arm 32 that is slidably inserted in the cylinder 31.
A base end of the cylinder 31 is pivotally supported by a bracket P2 fixed to a substrate P1 attached to a side surface of the tailgate 3 through a support shaft 33 so as to be swingable.
Further, the tip 34 of the slide arm 32 is connected to the left and right ends 21 and 22 of the support shaft 20 via bearings (not shown) so as to be relatively rotatable.
Further, on the bracket 35 attached to the tip portion of the cylinder 31, a cam pin 36 as an engaging portion that engages with a cam member 60 to be described later is projected in parallel to the support shaft 20 and toward the weighing platform 10. It is fixed.
[0017]
On the other hand, a support shaft P4 is provided on the bracket P3 fixed to the front of the bracket P2 of the substrate P1. A pair of left and right hydraulic cylinders 40 are interposed between the support shaft P4 and the left and right ends 21 and 22 of the support shaft 20, respectively.
These hydraulic cylinders 40 include a cylinder 41 and a rod 42 that is inserted into the cylinder 41 so as to be relatively slidable.
The base end 43 of the cylinder 41 is pivotally supported with respect to the tailgate 3 by the support shaft P4. Further, the tip 44 of the rod 42 is connected to the left and right ends 21 and 22 of the support shaft 20 via bearings (not shown) so as to be relatively rotatable.
The hydraulic cylinder 40 can be freely expanded and contracted by supplying pressure oil through a hydraulic pipe (not shown) connected to the cylinder 41.
[0018]
On the other hand, a support shaft P6 is provided on the bracket P5 fixed to the lower end of the substrate P1. A support shaft 38 is provided on the bracket 37 fixed to the longitudinal center of the cylinder 31 of the telescopic arm 30. A gas cylinder 50 as an urging means is interposed between the support shaft 38 and the support shaft P6.
The gas cylinder 50 includes a cylinder 51 and a rod 52 that is inserted into the cylinder 51 so as to be relatively slidable. The gas cylinder 50 has a structure in which the rod 52 is protruded toward the telescopic arm 30 by the high-pressure gas sealed in the cylinder 51, and the telescopic arm 30 is always urged toward the rear of the vehicle body. .
[0019]
Further, a pair of left and right cam members 60 that rotate integrally with the support shaft 20 around the axis of the support shaft 20 are fixed to the left and right end portions 21 and 22 of the support shaft 20, respectively.
These cam members 60 have cam surfaces 61 that engage with the cam pins 36.
[0020]
Next, the operation of the dust weight measuring apparatus 100 of the present embodiment having the above-described structure will be described with reference to FIGS.
[0021]
As shown in FIG. 3, in a state where the hydraulic cylinder 40 is shortened the most, the telescopic arm 30 is also shortened fully.
As a result, the support shaft 20 is positioned at the apex position of a triangle having a length of three sides each of a shortened length L1 of the hydraulic cylinder 40, a shortened length L2 of the telescopic arm 30, and an interval length L3 between the support shaft P4 and the support shaft 33. Fixed to.
Therefore, the support shaft 20, that is, the weighing platform 10 is fixed at the retracted position below the tailgate 3 and cannot move back and forth and up and down.
Further, the gas cylinder 50 is shortened fully against the biasing force by the telescopic arm 30.
[0022]
At the same time, in the retracted position, the pair of left and right cam pins 36 engages with the end portion of the cam surface 61 of the pair of left and right cam members 60 on the support shaft 20 side. As a result, the weighing platform 10 is rotated counterclockwise up to a predetermined angle integrally with the support shaft 20, and the rear end portion is in a higher state.
As a result, the weighing platform 10 is positioned in front of the handle H for opening and closing the hopper door of the tailgate 3 and the safety switch S for urgently stopping the operation of the dust scraping device (not shown) and behind the rearmost end of the dust truck 1. It does not protrude.
[0023]
In contrast, when the hydraulic cylinder 40 is slightly extended as shown in FIG. 4, the telescopic arm 30 is also slightly extended. Accordingly, the pair of left and right cam pins 36 engages with the end portion on the side away from the support shaft 20 of the cam surfaces 61 of the pair of left and right cam members 60. As a result, the weighing platform 10 rotates clockwise to a predetermined angle integrally with the support shaft 20, and the rear end roller 12 is at the lowest position as the rear end portion is in a lower position.
[0024]
At the same time, in this state, the hydraulic cylinder 40 is swingable about the support shaft P4, and the telescopic arm 30 is swingable about the telescopic support shaft 33. Further, the gas cylinder 50 urges the telescopic arm 30 toward the rear side of the vehicle body.
Thereby, the telescopic arm 30 is moved to a position where the axial component of the gas cylinder 50 of the total weight of the weighing platform 10, the support shaft 20, the telescopic arm 30 and the hydraulic cylinder 40 and the urging force of the gas cylinder 50 are balanced. It swings around the support shaft 33 on the rear side of the vehicle body. Accordingly, the support shaft 20, that is, the weighing platform 10 descends toward the ground G while gradually moving toward the rear of the vehicle body as the hydraulic cylinder 40 extends.
[0025]
Thereafter, when the hydraulic cylinder 40 further expands, the rear support roller 12 of the weighing platform 10 is first grounded as shown in FIG.
Along with this, a part of the weight of the weighing platform 10 is supported by the ground G, and the external force to shorten the gas cylinder 50 loaded from the telescopic arm 30 to the gas cylinder 50 is reduced, so the gas cylinder 50 is full. Stretch to.
As a result, the telescopic arm 30 is fully swung toward the rear side of the vehicle body by the gas cylinder 50, so that the weighing platform 10 is located closest to the rear side of the vehicle body.
At this time, since the engagement between the cam pin 36 and the cam surface 61 is released, the weighing platform 10 can freely rotate about the axis of the support shaft 20.
[0026]
When the hydraulic cylinder 40 further expands, as shown in FIG. 6, the front support roller 11 of the weighing platform 10 is also brought into contact with the ground G, and the weight can be measured.
In this state, it is possible to measure the weight of the garbage loaded on the garbage truck by placing it on the weighing table 10. In addition, the weight of the dust can be measured by subtracting the weight of the worker from the weight measured when the worker holding the dust gets on the weighing table 10.
[0027]
When the hydraulic cylinder 40 is gradually shortened after the measurement of the dust weight is completed, the weighing platform 10 is gradually lifted in a procedure reverse to the procedure described above, and as shown in FIG. Stored in position and fixed.
[0028]
That is, the dust weight measuring apparatus 100 of the garbage truck according to the present embodiment supports the weighing table 10 with the telescopic arm 30 and the hydraulic cylinder 40 to move up and down, and uses the gas cylinder 50 as an urging means to measure the weighing table 10. The weighing platform 10 is rotated by a predetermined angle using the cam member 60 and the cam pin 36.
Thus, as shown in FIG. 1, the operation space is not increased as in the conventional apparatus shown in FIGS. 7 and 8 in which the weighing platform is moved up and down by the operation of a pair of substantially parallel links. Can be accommodated in a small space at the rear end of the tailgate 3.
In addition, since it is only necessary to fix the base plate P1 that pivotally supports the base ends of the telescopic arm 30, the hydraulic cylinder 40, and the gas cylinder 50 to the tailgate 3 of the garbage truck 1, the existing garbage truck 1 can be easily modified. Can be attached.
[0029]
As mentioned above, although the dust weight measuring apparatus of the garbage collection vehicle of one Embodiment which concerns on this invention was demonstrated in detail, it cannot be overemphasized that this invention is not limited by embodiment mentioned above and a various change is possible. .
For example, in the above-described embodiment, the gas cylinder 50 as an urging means is interposed between the tailgate 3 and the telescopic arm 30, but between the tailgate 3 and the support shaft 20, or the tailgate 3. And the hydraulic cylinder 40 may be interposed.
Further, the biasing means may be one in which a spring compressed between the rod 51 and the cylinder 51 is interposed.
In the above-described embodiment, the distal end of the telescopic arm 30 and the distal end of the hydraulic cylinder 40 are both connected to the support shaft 20. However, they can be directly connected to the weighing platform 10 with their positions shifted.
[0030]
【The invention's effect】
As is apparent from the above description, the dust weight measuring apparatus of the garbage truck according to the present invention moves the weighing platform backward using the biasing means while supporting the lifting platform with the hydraulic cylinder and the telescopic arm. In addition, the weighing platform is rotated by a predetermined angle using a cam member.
Thereby, the compact dust weight measuring apparatus which does not take a working space widely like the conventional apparatus which raises / lowers and rotates a measuring stand by operation | movement of a pair of substantially parallel links can be provided.
Further, since it is only necessary to pivotally support the telescopic arm, the hydraulic cylinder, and the base end of the urging means on the body of the garbage collection vehicle, the existing garbage collection vehicle can be easily modified and attached.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which an embodiment of a dust weight measuring apparatus according to the present invention is attached to a garbage collection vehicle.
FIG. 2 is a front view of the dust weight measuring apparatus shown in FIG. 1 as viewed from the rear of the vehicle body of the garbage collection vehicle.
FIG. 3 is an enlarged side view showing the dust weight measuring apparatus shown in FIG.
4 is a side view showing a state in which the weighing platform of the dust weight measuring apparatus shown in FIG. 3 has started to descend. FIG.
5 is a side view showing a state in which the weighing table shown in FIG. 3 is grounded. FIG.
6 is a side view showing the dust weight measuring apparatus shown in FIG. 3 in a weight measuring state. FIG.
FIG. 7 is a side view showing the weight measuring device described in JP-A-9-170944 in a weight measuring state.
FIG. 8 is a side view showing the weight measuring device described in JP-A-9-170944 in a retracted state.
[Explanation of symbols]
B Dust G Ground H Hopper handle P1 Substrate P2, P3, P5 Bracket P4, P6 Support shaft S Safety switch W Worker 1 Dust collection truck 2 Dust container 3 Tailgate 4 Support link 5 Guide groove 6 Support link 7 Weighing platform 8 Hydraulic cylinder 10 Weighing table 11, 12 Support roller 13 Body portion 14 Load cell 15 Dust placement plate 20 Support shafts 21, 22 End 30 Telescopic arm 31 Cylinder 32 Slide arm 33 Support shaft 34 End of slide arm 35 Bracket 36 Cam pin 37 Bracket 38 Support shaft 40 Hydraulic cylinder 41 Cylinder 42 Rod 43 Base end 44 Rod end 50 Gas cylinder (biasing means)
DESCRIPTION OF SYMBOLS 51 Cylinder 52 Rod 60 Cam member 61 Cam surface 100 The dust weight measuring apparatus of the refuse collection vehicle of one Embodiment which concerns on this invention

Claims (5)

A weighing platform for measuring the weight of the dust loaded on the garbage truck;
A support shaft that extends in the width direction of the body of the garbage truck and rotatably supports the weighing table;
The front end of the support shaft is connected to the end of the support shaft, the base end of the support shaft is pivotally supported by the vehicle body, and the support shaft is swingably supported in the front-rear direction of the vehicle body. Telescopic arm that raises and lowers between a retracted position below the vehicle body and a ground contact position behind the vehicle body,
The distal end of the telescopic arm is pivotally supported by the distal end, and the base end of the telescopic arm is pivotally supported by the vehicle body in front of the pivot point of the base end with respect to the vehicle body. A hydraulic cylinder that expands and contracts the telescopic arm by expansion and contraction;
Biasing means for constantly urged toward the support shaft to the rear side of the front Symbol vehicle body,
The weighing table is provided on the telescopic arm, and approaches the weighing table as the telescopic arm is shortened, presses the front end of the weighing table, and the rear end of the weighing table is raised by the pressing force. A cam pin that rotates about the axis of the support shaft ,
The hydraulic cylinder is
As a result of the shortening, the telescopic arm is swung toward the front side of the vehicle body against the urging force of the urging means, the telescopic arm is shortened to raise the measuring table, and the cam pin is used to lift the measuring table. Rotate the weighing platform so that the rear end rises and fix it in the retracted position,
The telescopic arm is extended by the extension to lower the weighing platform, and the weighing platform is rotated about the axis of the support shaft to move to the grounding position. apparatus. The weighbridge is refuse collection vehicles according to claim 1, characterized in that it comprises a cam member which secure the engaging said weighbridge in a predetermined storage angles to said cam pin when the front Symbol flexible arm is shortened Dust weight measuring device.   The dust weight measuring apparatus for a garbage truck according to claim 1 or 2, wherein the biasing means is interposed between the vehicle body and the telescopic arm. The biasing means extends fully when the weighing platform contacts the ground, swings the telescopic arm fully toward the rear side of the vehicle body, and positions the weighing table at the rearmost side of the vehicle body. Item 4. A dust weight measuring apparatus for a garbage truck according to Item 3. 5. The hydraulic cylinder further extends from a state in which a rear end portion of the weighing table is grounded, thereby lowering a front end portion of the weighing table and moving the weighing table to a grounding position. The dust weight measuring device of the garbage truck described in 1.

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