JP4785523B2 - In-vehicle weighing device - Google Patents

Description

  The present invention relates to a vehicle-mounted weighing device that measures the weight of an object to be accommodated such as dust contained in a packing box (container) of a garbage truck.

  There are already known vehicles equipped with a weighing device for confirming the weight of a container such as a garbage truck, a bulk truck, a tank truck, a vacuum truck, etc., in which a container such as a packing box for storing the container is placed. ing.

  As this type of in-vehicle weighing device, for example, in Patent Documents 1 to 3, a load cell is interposed between the frame of the vehicle body and the container, the load receiving portion side of the load cell is fixed to the container, and the load cell is fixed The thing which fixed the part side to the flame | frame of the vehicle body is disclosed. This structure has an advantage that the configuration is extremely simple because the load cell is simply fixed to both the frame and the container of the vehicle body, but has the disadvantage that the measurement accuracy is poor as described below.

  A vehicle equipped with this type of in-vehicle weighing device has a structure in which the rigidity of the container is maintained extremely high so as to maintain the safety extremely high so that the contained object in the container does not leak to the outside. Generally, the frame of the vehicle body is low in rigidity itself as compared with the rigidity of the container. However, in the case where the above-described on-vehicle weighing device is not provided, the frame of the vehicle body and the container having high rigidity are combined by using bolts or the like to form an integrated structure. Structure.

  On the other hand, when a load cell is interposed between the container and the vehicle body frame, and the load cell is completely fixed to both the container and the vehicle body frame, Since there is almost no twisting of the vehicle body due to the height, the measurement accuracy of the on-vehicle weighing device is relatively small. Further, even when the installation surface is inclined, when the inclination angle is constant and the four wheels of the vehicle are substantially on the same plane, the inclination angle is disclosed in, for example, Patent Document 4 and the like. It is possible to keep the accuracy of calculation small by correcting with a system for calculating a correction value for.

  However, when the road surface (installation surface) on which the vehicle is in contact is not a uniform flat surface, it is partially inclined or protruding, and has an irregular shape. In the vehicle having the above, when only one wheel has a different vertical height as compared with the installation surface of the other three wheels, the body frame tends to be deformed due to torsion acting on the body frame.

  In this case, since the container has high rigidity and is strong, eventually, a force to deform from the vehicle body frame side to the load cell, that is, a lateral load acts. This lateral load becomes an interference force with respect to the vertical load of the mass of the object in the container to be weighed, and hinders and lowers the weighing accuracy.

  The interference force that hinders the weighing accuracy is in addition to the torsional deformation of the body frame. That is, as an element of the interference force, there are a temperature difference between the body frame and the container, and a difference in thermal expansion strain due to a difference in heat conduction. This interference force is a very large value and greatly hinders the weighing accuracy of the on-vehicle weighing device.

  Here, generally, the vehicle body frame provided with the vehicle-mounted weighing device has a length in the front-rear direction larger than the length in the left-right direction (that is, the vehicle width), and the load cell of the vehicle-mounted weighing device is a container on the vehicle body frame. Are often disposed at four locations near the front, rear, left and right ends in a plan view in the region where the is placed. Accordingly, the load cells are arranged such that the dimension between the load cells in the front-rear direction of the vehicle body is larger than the dimension between the load cells in the vehicle body left-right direction. Therefore, the lateral load due to the difference in thermal expansion strain as described above (substantially horizontal load including the left and right direction and the front and rear direction) is a force acting between the front and rear load cells rather than the force acting between the left and right load cells. Is bigger.

  In response to this, as a technique for improving the lateral load acting between the load cells before and after greatly hindering the weighing accuracy of the on-vehicle weighing device, Patent Document 5 discloses a structure in which the load cell is configured to be slidable in the longitudinal direction of the vehicle body. Is disclosed. By adopting such a structure, the lateral load acting in the front-rear direction can be brought close to 0, and a certain effect can be expected. However, in the structure disclosed in Patent Document 5, thermal expansion in the left-right direction of the vehicle body is ignored, and no lateral force due to vehicle body twisting other than thermal expansion is taken into consideration. It remains as an issue.

  As another technique for reducing the lateral load, Patent Document 6 describes that a container is supported by a plurality of load cells (load detectors) placed on a body frame, and the container moves in the front-rear direction with respect to the body frame. A forward / backward movement restricting device that restricts movement, a left / right movement restricting device that restricts movement of the container in the left-right direction with respect to the vehicle body frame, and a lashing device that can selectively restrain the container from vertically moving The structure of a garbage truck provided with a is disclosed.

  Here, the front-rear movement restricting device and the left-right movement restricting device are provided at four locations in the front-rear and left-right directions. The forward / backward movement restriction device uses a so-called rod in the front-rear direction, in which a rod extending in the front-rear direction is connected between a bracket erected on the outer side of the vehicle body and a bracket erected on the outer side of the main girder. This structure restricts the movement of the container in the front-rear direction with respect to the vehicle body frame. In addition, the right and left movement restriction device has a structure in which a rod extending in the left and right direction is connected between a bracket standing on the outer side of the vehicle body and a bracket suspended from the container, so-called a rod is rubbed in the left and right direction Thus, the container is always restricted from moving in the left-right direction with respect to the vehicle body frame. It should be noted that a more specific configuration for these is not described. Further, the lashing device pivotally supports the cylinder on the inner surface of the vehicle body, forms a long hole in the bracket suspended from the container, and engages the end portion of the cylinder with the long hole. When the vehicle is running, the cylinder is prevented from moving upward from the body frame as a secured state with the cylinder retracted, while during weighing, the cylinder retracted part is extended to extend the secured state. It comes to cancel.

  In the structure of the garbage truck disclosed in the above-mentioned Patent Document 6, the configuration is such that the forward / backward and left / right direction restricting operations are always performed by the forward / backward movement restricting device and the left / right movement restricting device, including during travel and weighing. is there. Therefore, when the connecting portions of the rods provided in the forward / backward movement restricting device and the left / right movement restricting device are in contact with the brackets provided at both ends thereof, Since the lateral load due to thermal expansion or the like and the lateral load due to thermal expansion are received by the forward / backward movement restricting device or the left / right movement restricting device, there is an advantage that these lateral loads do not act on the load cell. However, on the other hand, at these contact points, interference is caused by the forward / backward movement restricting device or the left / right movement restricting device, which eventually becomes a factor that hinders measurement accuracy.

  In order to prevent the measurement accuracy from being hindered in this way, it is considered to adjust the position so that there is a gap in the connecting portion between the rod and the bracket in the forward / backward movement restriction device or the left / right movement restriction device during weighing. It is done. However, it is necessary to adjust the gap so that there is no gap during measurement while adjusting the gap so that it takes a long time for weighing. It will depend on experience and will be very unreliable.

  In order to cope with this, there is an in-vehicle weighing device disclosed in Patent Document 7 which has already been filed by the inventors of the present invention. This in-vehicle weighing device is provided with a tightening device that fastens the vehicle body frame and the container and a lifting device having a hydraulic cylinder that lifts and lowers the container, and the load cell is separated from the container when the vehicle is running so that no load is applied to the load cell. The vehicle body frame and the container are tightened by the tightening device, and at the time of weighing, the tightening of the vehicle body frame and the container by the tightening device is released, the load cell is lifted by the lifting device, and the container is passed through the load cell. Is pushed up to raise the container from the vehicle body frame, and this container is supported by a plurality of load cells only during weighing, and is weighed.

According to this configuration, the container is supported in a state where the container is regulated at a predetermined position by the tightening device during traveling, while the container is supported by a plurality of load cells in the state where the tightening device is released during measurement. It is not necessary to adjust the gap size at the time of measurement, and it is possible to measure with extremely high accuracy in a posture that is close to ideal at the time of measurement, that is, in a state that is hardly affected by a lateral load.
JP 2004-224502 A JP 2004-69323 A Japanese Patent Laid-Open No. 2001-74540 JP-A-8-93045 Japanese Patent Laid-Open No. 2002-340662 Japanese Utility Model Publication No. 1-164205 JP 2002-148108 A

  However, the on-vehicle weighing device disclosed in Patent Document 7 is configured so that the entire container is directly lifted and lowered by a hydraulic cylinder of the lifting device and is loaded so that the container is supported by the load cell at the time of weighing. What had a big driving force was required. In addition, the load cell and the tightening device are provided separately, and the weighing unit including the load cell and the tightening device have complicated structures, which makes the manufacturing cost extremely expensive and increases the installation space. Was also needed.

  In addition, a structure in which a load cell is interposed between a vehicle body frame and a subframe attached along the container has been proposed separately, but in this type of structure, the body frame and the subframe of the container A relatively large space is necessary to interpose the load cell in between, and as a result, the container is placed at a high position, and as a result, the center of gravity of the entire vehicle becomes high, and there is a possibility that the vehicle may fluctuate during driving. .

  The present invention solves the above-mentioned problems and problems. At the time of weighing, the lateral force due to thermal expansion and twisting can be minimized and the weight of the container including the contents to be contained can be minimized. It is intended to provide an on-vehicle weighing device that can be measured with a good weighing accuracy while keeping the manufacturing cost low and can be installed compactly in a relatively small space. is there.

In order to solve the above-described problems, the present invention provides a container for accommodating an object to be mounted on a vehicle body frame, and a plurality of load cells are attached to the vehicle body frame side or the container side. A tightening device is provided for tightening each other, the container is supported by the plurality of load cells in a state where the tightening action by the tightening device is released at the time of measurement, and the weight of the contents to be contained is measured by the plurality of load cells and summed. An on-vehicle weighing device for calculating the weight of the object to be contained, having a fulcrum serving as a swing center and a force point for applying a driving force to push up the container, and providing a lever for lifting the container from the body frame, by combining the tightening operation by the container lifting operation and clamping device according to the lever, the provided switching means for switching between a measuring time state and a non-metric at state, said switching means, the lever Wherein the non-metering time state to perform the tightening operation by the container lifting operation and twistlock, to switch the metering time state to release the container lifting operation and clamping operation by the lever to apply a load of container to a load cell that And

According to this configuration, by using the lever to lift the container from the body frame, the driving force of the driving source such as a hydraulic cylinder to be lifted can be reduced compared with the case of directly lifting the container. Accordingly, the manufacturing cost can be reduced and the installation space can be reduced. Also, with this configuration, when the container is not weighed, the container is lifted by the lever, so that no load is applied to the load cell, and the load cell is not adversely affected by the force from the container side during traveling.

  In addition, the present invention has a point where the lever has a point where the load of the container is not measured, and a spherical part that applies the load of the container to the lever in the vertical direction between the point of leverage and the container or the vehicle body frame. It is characterized by being interposed.

  With this configuration, when performing the tightening operation, the container and the vehicle body frame can be smoothly aligned via the spherical body portion. In addition, when the tightening operation is released, the relative movement of the container side with respect to the vehicle body frame is facilitated via the spherical body portion, and the lateral load is not applied before the shift to the weighing operation. Then, when the transition to the load cell support and the weighing operation is started, or when the tightening operation is started, the tightening force can be applied in a state where the lateral load is not so much applied.

In addition, the present invention is characterized in that a spherical concave portion that receives the spherical portion is provided, and the radius of curvature of the spherical concave portion is formed larger than the radius of curvature of the spherical portion.
With this configuration, even if the position where the container receives the load is not matched due to the twist of the vehicle body frame due to unevenness or inclination of the installation surface, or the stress due to the difference in thermal expansion between the vehicle body frame and the container, By shifting, the tightening operation can be performed smoothly.

  In addition, the present invention is provided with a lever and a tightening device corresponding to each of the plurality of load cells, and corresponds to the remaining leverage rather than the radius of curvature of the spherical concave portion provided corresponding to a part of the leverage. The spherical concave portion provided in this way has a large radius of curvature.

  According to this configuration, when switching from the non-weighing state such as during traveling to the weighing state, when the tightening with the body frame by the tightening device is released, the radius of curvature of the spherical recess is formed to be small. The position of the contact point between the spherical concave portion and the spherical portion is shifted so that the load on the container side acts on the vehicle body frame from the top to the bottom, or is in a state close to this at the location of the lever of the part. Will be adjusted automatically. Further, since the radius of curvature of the spherical concave portion is formed to be large in the remaining lever portion, it can be relatively moved relative to the lateral direction and moved to a position corresponding to thermal expansion or twist. Thereafter, the lever is further moved in this state, so that the load on the container side can be received by each load cell, and the spherical body part can be separated from the spherical concave part and can be measured with high accuracy in a stable posture. .

  Further, the present invention is characterized in that a lever is attached to the vehicle body frame side via a fulcrum, and a stopper portion is provided on the lever to prevent the container from moving relatively forward or backward.

  With this configuration, even when the container side is largely moved in the front-rear direction with respect to the vehicle body frame side during traveling, the container-side portion abuts on the stopper portion to prevent the movement, and as a result, Safety is improved.

Further, the present invention is characterized in that the lever is provided with a tightening force action point on which a tightening force from the tightening device acts.
With this configuration, it is possible to apply a tightening force using a lever and further save space.

  In addition, the present invention provides a cylinder device that generates a driving force that pushes up a container against a lever and a lever, and a link mechanism that is interposed between the cylinder device and the lever above the upper surface of the vehicle body frame on the vehicle body frame side. And a tightening force generating elastic member for generating a tightening force by urging the container downward through a lever and a tightening force transmitting plate are attached to the container side.

  With this configuration, most of the in-vehicle weighing device can be disposed at a location above the upper surface of the body frame, and therefore, garbage trucks and the like that often provide various devices at locations below the body frame, such as the side of the body frame. In addition, it can be assembled correspondingly.

  Further, the present invention provides a lever support member for supporting a lever through a fulcrum, a cylinder support member for supporting a cylinder device and a link mechanism, and a base member on which load cells are respectively fixed on left and right body frames. The base member attached to the left body frame and the base member attached to the right body frame are connected to each other by a reinforcing member extending left and right.

  With this configuration, the base members mounted on the left and right body frames are connected by the reinforcing member, and the distance in the vehicle width direction between the vehicle body frame upper surfaces of the vehicle is prevented from fluctuating. In other words, if such a reinforcing member is not provided, the weight receiving member that is loaded with the container side load at the time of weighing or the like is disposed on the base member where it protrudes to the side (outside) of the body frame. In this case, the upper surface portion of the vehicle body frame on which the load on the container side is concentrated during weighing tries to bend and deform in a cantilever shape so as to spread outward when viewed from the front centering on the lower end portion of the vehicle body frame. However, by providing a reinforcing member and connecting the left and right base members, it is possible to prevent the upper surface portion of the left and right body frames and the space between the base members from widening, and to minimize this bending deformation. Reliability is improved.

  Further, according to the present invention, the switching means does not perform the lifting operation of the container by the lever but performs the tightening operation by the tightening device while performing the lifting operation of the container by the lever and the non-weighing state in which the tightening operation by the tightening device is performed. It is characterized by switching between a state during measurement in which the load of the container is applied to the load cell after being released.

With this configuration, no load is applied to the load cell during non-weighing, and the load cell is not adversely affected by the force from the container side during traveling or the like.
Further, the present invention is characterized in that, when not being weighed, the container side is not lifted by a lever, and the weight of the container is applied to the entire body frame as a distributed load to be supported.

With this configuration, when the vehicle is not weighed, such as when traveling, the weight of the container can be applied to the entire body frame as a distributed load and supported in an extremely stable state.
Further, the present invention is characterized in that the lever is constituted by a parallel link mechanism.

With this configuration, a load can be applied from the parallel link mechanism to the load cell in the vertical direction (gravity direction), and measurement can be performed with high accuracy.
Further, the present invention is characterized in that the body, the cylinder device that generates a driving force for pushing up the container against the lever and the lever, and the link mechanism interposed between the cylinder device and the lever are provided on the vehicle body frame side. And

  With this configuration, a fluid pipe for driving the cylinder device can be attached to the vehicle body frame side, so that it can be accurately measured. That is, when the cylinder device is provided on the container side, a part of the fluid piping that drives the cylinder device must also be attached to the container side.In this case, when the container side is lifted and lowered by the lever, Although the measurement accuracy may be lowered by pulling the container side to the body frame side through a fluid pipe or the like, such a problem does not occur when the cylinder device is provided on the body frame side.

  Further, according to the present invention, the lever is provided with a tightening force acting point at which a tightening force from the tightening device acts, and the container is urged downward via the lever to tighten the tightening force. An elastic member for generating a tightening force for generating force and a tightening force transmission plate are attached.

  With this configuration, since the lever is provided with a tightening force operating point, the lever can be used to apply the tightening force, and further space saving can be achieved. In addition, because the elastic member for tightening force generation and the tightening force transmission plate urge the container downward through the lever to generate the tightening force, the weight of the container is applied to the entire body frame as a distributed load during tightening. And can be supported in an extremely stable state.

  According to the present invention, the container can be lifted from the body frame using the lever, so that the driving force of the driving source such as the hydraulic cylinder to be lifted can be reduced, and the manufacturing cost can be reduced accordingly. In addition, it is possible to reduce the installation space, and when the load is not measured, no load acts on the load cell, so the load cell is not adversely affected by the force from the container side during traveling, Reliability is improved. Further, by providing the lever with a tightening force acting point where the tightening force from the tightening device acts, the lever can be used to apply the tightening force, and further space saving can be achieved.

  In addition, a spherical part that allows the load of the container to act in the vertical direction is interposed between the lever and the container or the vehicle body frame, or a spherical concave part that receives the spherical part is provided, and the radius of curvature of the spherical concave part is By forming it larger than the radius of curvature of the sphere part, it is possible to release the tightening before changing the load on the container side to the load cell at the time of weighing, and to prevent the lateral load from acting at the time of weighing, The weighing accuracy can be increased.

  In addition, in the case of tightening by forming the radius of curvature of the spherical concave portion provided corresponding to the remaining lever larger than the radius of curvature of the spherical concave portion provided corresponding to a part of the lever, the spherical concave portion is provided. The sphere is moved to a position corresponding to thermal expansion and torsion in other levers with reference to some levers that have a small radius of curvature, so tighten in a stable posture. be able to.

  Also, a cylinder device that generates a driving force for pushing up the container against the lever and the lever, and a link mechanism that is interposed between the cylinder device and the lever are attached to a position above the upper surface of the vehicle body frame on the vehicle body frame side. By attaching to the container side a tightening force generating elastic member and a tightening force transmitting plate that urges the container downward through a lever to generate a tightening force, most of the in-vehicle weighing device has an upper surface of the body frame. It can be disposed at a higher position, and can be assembled in good correspondence with a garbage truck or the like that often has various devices provided at a position below the body frame, such as the side of the body frame.

  Further, the left and right base members, to which the lever supporting member for supporting the lever through the fulcrum and the supporting member such as the cylinder for supporting the cylinder device and the link mechanism are fixed, are connected by the left and right reinforcing members. The space between the upper surface portion of the body frame and the base member is prevented from widening, and this bending deformation can be minimized, thereby improving the reliability.

  In addition, when the container is not weighed, the container side is not lifted by the lever, and the weight of the container is applied to and supported by the entire body frame as a distributed load. Can be supported in a very stable state as a distributed load, and stability during running can be improved.

Further, by configuring the lever with a parallel link mechanism, a load can be applied in the vertical direction (gravity direction) from the parallel link mechanism to the load cell, and measurement can be accurately performed.
Further, the present invention provides a cylinder device that generates a driving force for pushing up a container against a lever and a lever, and a link mechanism interposed between the cylinder device and the lever on the vehicle body frame side. Since the piping of the fluid for driving the apparatus can be attached to the body frame side, it can be measured with high accuracy.

  Further, by providing the lever with a tightening force acting point where the tightening force from the tightening device acts, the lever can be used to apply the tightening force, and further space saving can be achieved. Also, the elastic member for tightening force generation and the tightening force transmission plate generate a tightening force by urging the container downward through the lever, and the weight of the container acts on the entire body frame as a distributed load during tightening. And can be supported in an extremely stable state.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the left and right direction refers to a direction that is left and right in a state of facing the traveling direction in the vehicle.
FIG. 1 is an overall side view of a garbage truck provided with an on-vehicle weighing device according to a first embodiment of the present invention, and FIG. 2 is a schematic plan view of the garbage truck body (state in which a garbage storage tank is omitted) Is indicated by a solid line, and the refuse storage tank is schematically indicated by a virtual line).

  As shown in FIGS. 1 and 2, the garbage truck 1 is provided with a cab 2 at the front of the vehicle body, and as a container for storing garbage (including waste paper) as an object to be contained at the rear of the vehicle body. And a vehicle-mounted weighing device including weighing and tightening units U arranged at four positions on the front, rear, left and right in plan view. Further, the cargo box 3 of the garbage truck 1 has a loading chamber 3a called a packer having a pushing plate, a rotating plate, and the like at the rear end thereof. The pushing plate and the rotating plate of the loading chamber 3a are provided in the vehicle. Driven by a motor or a prime mover. Note that F and R in FIG. 1 are a front wheel and a rear wheel of the vehicle.

  As shown in FIG. 6 and the like, a packing box subframe 4 having a substantially U-shaped cross section extending in the front-rear direction is disposed in a fixed state at the left side and the right side of the lower surface portion of the packing box 3. On the vehicle body side, a vehicle body frame 5 having a substantially U-shaped cross section extending in the front-rear direction at the left side and the right side of the vehicle is disposed in parallel with the cargo box subframe 4. As shown in FIGS. 1 and 2, the measuring and tightening unit U includes left and right measuring and tightening units U disposed at the front side with respect to the vehicle body frame 5 and left and right measuring and tightening units U disposed at the rear side. There is a unit U, and the measuring and tightening unit U at the front position and the measuring and tightening unit U at the rear position are arranged in the measuring and tightening unit U so that their constituent elements are reversed with respect to the front-rear direction. . In addition, in FIGS. 3-6, the measurement tightening unit U arrange | positioned in the front side location is shown. Further, as shown in FIG. 6, each measuring and tightening unit U is generally arranged from above the vehicle body frame 5 to the side of the cargo box subframe 4. Further, cross members 8 extending in the vehicle width direction and connecting the left and right body frames 5 are disposed at the front and rear positions of the vehicle.

  As shown in FIGS. 3 to 6, a base member 6, a fixing lower plate (not shown), and a connecting bolt 9 for connecting these members are provided at each vehicle body frame 5 where each measuring and tightening unit U is provided. A fixing part consisting of A fulcrum support member 11 that swingably supports a fulcrum portion 10a of a lever (arm portion) 10 on a base member 6 fixed to the upper surface portion of the vehicle body frame 5, a link mechanism 12 and a hydraulic cylinder 13 described later. And a load cell 15 are attached.

  As shown in FIGS. 3 and 4, in the measuring and tightening unit U provided at the front position on the vehicle body frame 5, a link mechanism is provided at the rear end of the lever 10 (the right end toward the paper surface of FIG. 3). An extension / retraction rod portion 13 a of a hydraulic cylinder 13 that raises and lowers the rear end portion of the lever 10 is connected to the lever 10.

  As shown in FIGS. 3 to 5, the link mechanism 12 includes first to third link members 21 to 23 and first to fourth connecting pins 25 to 28. The lower end of the first link member 21 is connected to the first connecting pin 25 fitted to the retracting rod portion 13 a of the hydraulic cylinder 13, and the upper end is erected via the second connecting pin 26. It is connected to the upper end of the member 14. The second link member 22 has an upper end connected to the first connecting pin 25 and a lower end connected to a third connecting pin 27 connected to the upper end of the third link member 23. The third link member 23 is regulated to move up and down in a vertical posture by a long hole portion 14 a provided in the standing member 14, the upper end is connected to the third connection pin 27, and the lower end is the fourth. The connecting pin 28 is connected to the rear end of the lever 10. A cylinder bracket 29 for attaching the hydraulic cylinder 13 is attached to the upper end of the standing member 14, and the rear end of the cylinder bracket 29 is attached to the rear end of the hydraulic cylinder 13 via an attachment pin 24. The end is mounted in a swingable posture.

  Corresponding to the weighing tightening unit U, a packing box (container) side fixing member 16 is fixed to the packing box subframe 4. Further, between the fulcrum part 10a and the rear end part of the lever 10, the luggage box 3 is urged downward on the body frame 5 side, that is, the body frame 5 via the lever 10 and the luggage box side fixing member 16. Further, a biasing rod 31 provided in a tightening device 30 for tightening the cargo box 3 is connected via a biasing connecting pin 32. The urging rod 31 extends upward through the regulating plate 17 and the bottom surface of the cargo box side fixing member 16 attached so as to extend rearward from the upper end portion of the fulcrum support member 11. Between the two nuts 33 screwed into the upper end of the plate and the cargo box side fixing member 16, a tightening force transmission plate 35 is disposed with a plurality of disc springs 34 as elastic members for generating a tightening force. ing.

  In addition, a spherical load 41a that is recessed in a hemispherical shape is formed on the upper surface of the front end (the other end) of the lever 10, and a lever load receiving member 41 that functions as a focus is assembled to the spherical recess 41a. The lower half portion of the spherical body portion (metal hard ball) 40 that applies the load of the cargo box 3 to the lever 10 in the vertical direction is mounted on the lever 10. In order to correspond to this, also in the packing box side fixing member 16, the load bearing member 43 for non-weighing is formed with a spherical concave portion 43 a recessed in a hemispherical shape upwardly via the mounting member 42. Is assembled, and the spherical concave portion 43a is arranged so that the upper half of the spherical portion 40 can be fitted.

  Further, a load cell 15 is fixed at a position in front of the lever 10 on the base member 6 in the measuring and tightening unit U. Then, a load-loading member for weighing 44 for loading the load cell 15 with a load on the load box 3 side is fixed to the load box side fixing member 16 so as to face the load cell 15 so as to protrude above the load cell 15. An abutting concave surface 44a formed on the lower surface of the weighing load member 44 can be brought into contact with the formed arc-shaped load receiving convex portion 15a.

  Further, a portion slightly ahead of the fulcrum portion 10a of the lever 10 is a stopper portion 10b provided to the vicinity of the rear surface portion of the mounting member 42, and the cargo box 3 side is larger in the front-rear direction than the body frame 5 side. When the relative movement is attempted, this portion abuts on the rear surface portion of the mounting member 42 to regulate the position.

  Here, the weighing tightening unit U at the rear portion has the same structure as the weighing tightening unit U at the front portion, but is reversely arranged with respect to the front-rear direction, and is a cargo box with respect to the body frame 5 side. When the 3 side is about to move backward relatively, the mounting member 42 comes into contact with the stopper portion 10b of the measuring and tightening unit U at the front side, and the relative movement is prevented. Thus, when the cargo box 3 side attempts to relatively move forward, the mounting member 42 comes into contact with the stopper portion 10b of the measuring and tightening unit U in the rearward position to prevent the relative movement. .

  Further, in particular, in this in-vehicle weighing device, the spherical concave portion 41a of the lever load receiving member 41 that receives the sphere 40 from below is used whose radius of curvature is larger than that of the sphere 40. The radius of curvature of the spherical recess 41a of the lever load receiving member 41 is different depending on each measuring and tightening unit U.

  In this embodiment, the spherical concave portion 43a of the non-weighing load load member 43 provided in the weighing tightening unit U on the front left side in plan view has a radius of curvature of the spherical portion 40. The spherical concave portion 43a of the non-weighing load-loading member 43 provided in the weighing tightening unit U on the front right side has a radius of curvature that is very close to (slightly larger) than What is larger than the radius of curvature of the spherical recess 43a of the non-weighing load member 43 in the weighing tightening unit U on the left side is used. Further, the spherical concave portion 43a of the non-weighing load bearing member 43 provided in each of the rear left and right weighing tightening units U has a radius of curvature for the non-weighing time in the weighing tightening unit U on the front right side. What is formed larger than the radius of curvature of the spherical recess 43a of the load member 43 is used.

Reference numeral 50 denotes a reinforcing member that is fixed so as to straddle the left and right base members 6 mounted on the vehicle body frame 5 and improves the rigidity in the vehicle width direction on the vehicle body frame 5 side.
In addition, the vehicle of the present invention is provided with a control unit as switching means (not shown) that performs the following operations. Note that a simple switching switch may be provided as the switching means.

  In the above-described configuration, the control operation and action by the control unit during non-measurement such as when the vehicle is running will be described. For ease of understanding, as shown in FIGS. 3 to 8, the case of the front-side measuring and tightening unit U will be described. However, in the case of the rear-side measuring and tightening unit U, the arrangement, the link mechanism 12, and the like. The moving direction is only reversed in the front-rear direction, and the tightening operation and the weighing operation are all the same.

  As shown in FIGS. 3 to 6, when the vehicle is not running, such as when the vehicle is running, the retracting / retracting rod portion 13 a of the hydraulic cylinder 13 is extended to the most forwardly projecting position. In conjunction with this, the first link member 21 and the second link member 22 are bent slightly forward (the first connecting pin 25 is connected to the second connecting pin 26 and the third connecting pin 27. To the second connecting pin 26 fixed at a predetermined position on the vehicle body frame 5 side (standing member 14). Then, the third connecting pin 27 and the fourth connecting pin 28 are pushed down to a position close to the lowest position via the first link member 21 and the second link member 22, thereby The rear end is pushed down. As a result, the lever 10 is in a substantially horizontal posture, and the sphere portion 40 is pushed up by a lever load receiving member 41 that is provided at the front end portion of the lever 10 and functions as an emphasis. The load box 3 is lifted through the hour load load member 43, the attachment member 42, the load box side fixing member 16, and the load box subframe 4. Accordingly, at this time, the load on the side of the cargo box 3 acts on the lever load receiving member 41 of the lever 10 as an important point through the spherical body portion 40. At this time, the load member for measurement 44 attached to the load box side fixing member 16 is separated from the load cell 15 with a slight gap, and the load on the load box 3 side does not act on the load cell 15.

  In addition, the rear side of the lever 10 is in a substantially horizontal posture, and the urging rod 31 connected to the rear side of the lever 10 is in a lower position, and the lowermost pressing plate in which a plurality of disc springs 34 are interposed. 35 is in strong contact with the upper surface of the packing box side fixing member 16. Therefore, due to the urging force of the disc spring 34, the cargo box subframe 4 and the cargo box are conveyed via the lever 10 (specifically, the location of the urging connecting pin 32 as the tightening force acting point) and the cargo box side fixing member 16. 3 is pushed down and tightened to the body frame 5 side, and the cargo box 3 side is reliably prevented from floating upward with respect to the body frame 5. As a result, the cargo box 3 is fastened to the vehicle body frame 5 and can travel in a stable state.

  In this state, as shown in FIG. 3, the piston 13b and the retracting rod of the hydraulic cylinder 13 are in a posture in which the first link member 21 and the second link member 22 exceed the straight line L (beyond the dead center). Since the portion 13a is in a position that protrudes most forward, the posture is maintained well even if the hydraulic cylinder 13 is not actively loaded with hydraulic pressure that maintains the position of the retracting rod portion 13a.

  In the state where the vehicle is stopped and before the tightening by the tightening device 30 is released, the vehicle body frame 5 is twisted due to unevenness or inclination of the installation surface, or the thermal expansion difference between the body frame 5 and the cargo box 3. The vehicle body frame 5 tends to expand and contract with respect to the cargo box 3 due to distortion caused by the above. However, since the relative position between the cargo box 3 and the vehicle body frame 5 is fixed by the tightening device 30, the vehicle body frame 5 and the cargo box 5 3 is in a state where stress is applied to each other.

  When measuring, with the vehicle stopped, as shown in FIG. 7, hydraulic pressure is applied to the hydraulic cylinder 13, and the retracting / retracting rod portion 13a is moved to the most retracted position side. . In conjunction with this, the posture in which the first link member 21 and the second link member 22 are largely bent backward (the first connecting pin 25 is connected to the second connecting pin 26 and the third connecting pin 27). The third connecting pin 27 and the fourth connecting pin 28 are moved to the uppermost position with respect to the second connecting pin 26 with respect to the second connecting pin 26. It is pulled up to a location close to the position. As a result, the urging rod 31 connected to the rear portion of the lever 10 is in an upward posture, the uppermost pressing plate 35 is separated from the nut 33, and the urging force by the disc spring 34 does not act on the cargo box 3 side. The tightening operation is released. At this time, the front end portion of the lever 10 is gradually lowered.

  When the tightening operation is released in this manner, there is no restriction on the relative position between the body frame 5 and the cargo box 3, so that the body frame 5 is twisted due to unevenness or inclination of the installation surface, the body frame 5 and the load The vehicle body frame 5 expands and contracts with respect to the packing box 3 in accordance with distortion caused by a difference in thermal expansion from the box 3.

  That is, when the tightening operation is released in a state where the vehicle is stopped, the contact point between the spherical concave portion 43a having the smallest curvature radius and the spherical body portion 40 is defined as the reference point (that is, the measurement on the left side in the front in this embodiment). As the tightening unit U), the contact position between the spherical concave portion 43a of the remaining weighing tightening unit U and the spherical body portion 40 according to the twist of the body frame 5 and the distortion due to the difference in thermal expansion between the body frame 5 and the cargo box 3 Will shift.

  Thereafter, when hydraulic pressure is further applied to the hydraulic cylinder 13 and the front end portion of the lever 10 is lowered as shown in FIG. 7, each weighing tightening unit U measures the load receiving convex portion 15 a of the load cell 15. The spherical portion 40 is separated from the spherical concave portion 43 a of the non-weighing load load member 43 by contacting the contact concave surface 44 a of the hour load load member 44.

  Thereby, at the time of weighing, each load cell 15 can receive the full load on the side of the cargo box 3 and can be weighed in a good state in which the spherical body portion 40 is separated from the spherical concave portion 43a and there is almost no adverse effect due to the lateral load. High-precision weighing can be performed. Conventionally, since adjustment of a gap as in the case of providing a movement restricting device is unnecessary, time and labor for that are naturally unnecessary.

  After this, when the weighing operation is finished, the retractable rod portion 13a of the hydraulic cylinder 13 is extended to the most forwardly projecting position, and the lever 10 is in a substantially horizontal posture and is provided at the front end portion of the lever 10. The spherical part 40 thus pushed is pushed up, and the packing box 3 is lifted. Also in this case, before the tightening operation is completely applied, the sphere part 40 is temporarily supported only in a state where the tightening force is not applied. The relative movement of the cargo box 3 side with respect to the frame 5 becomes possible, and the positioning between the cargo box 3 side and the vehicle body frame 5 can be performed smoothly. Further, after this, a tightening operation is performed, and a tightening force can be applied in a state where the lateral load is not acting so much.

  Further, according to the above configuration, the load box 3 is lifted from the body frame 5 by using the lever 10, so that the container such as the load box 3 is directly lifted by a hydraulic cylinder or the like as in the prior art. Thus, the driving force of the driving source of the hydraulic cylinder 13 to be lifted can be reduced, and the manufacturing cost can be reduced correspondingly, and the hydraulic cylinder 13 can also be small, so that the installation space can be reduced. Can be reduced. Further, since the lever 10 is provided with a tightening force application point where the tightening force from the tightening device 30 acts, the lever 10 can be used to apply a tightening force, and further space saving can be achieved. Become. In addition, since the cargo box 3 is lifted by the lever 10 at the time of non-weighing, almost no load is applied to the load cell 15, and the load cell 15 is not adversely affected by the force from the cargo box 3 side during traveling. .

  By the way, although the garbage truck 1 has various parts, such as a fuel tank and a battery, these are arrange | positioned by the side of the vehicle body frame 5, or the downward | lower direction. Therefore, even when an on-vehicle weighing device is intended to be mounted on the garbage truck 1, a structural unit such as a weighing device or a tightening device that constitutes these on-vehicle weighing devices is also arranged on the side or below the body frame 5. If this is the case, the location where the components are placed interferes, and as a practical matter, it is difficult to adjust the placement space.

  On the other hand, in the in-vehicle weighing device according to the present invention, as described above, the weighing and tightening unit U itself is extremely space-saving, and all of the portions are not located on the side or the lower side of the vehicle body frame 5 but are loaded. Since it is disposed on the side of the box sub-frame 4 and above the upper surface of the vehicle body frame 5, there is little problem with respect to the arrangement space, and the on-vehicle weighing device can be retrofitted relatively easily. be able to.

  That is, the measuring and tightening unit U forming each part of the on-vehicle measuring device of the present invention includes a lever 10, a hydraulic cylinder 13 that generates a driving force for pushing up the cargo box 3 against the lever 10, and the hydraulic cylinder 13 and the lever 10. The main part such as the link mechanism 12 interposed between the two is attached to a position above the upper surface of the body frame 5 on the body frame 5 side, and the packing box 3 is urged downward via the lever 10 to be tightened. The disc spring 34 and the tightening force transmission plate 35 as elastic members for generating a tightening force that generate force are attached to the side portion of the cargo box subframe 4. Therefore, all of the on-vehicle weighing device can be disposed at a location above the body frame 5, such as a garbage truck 1 in which various devices are often provided at a location below the body frame 5, such as the side of the body frame 5. Can also be assembled in good correspondence.

  Further, since only the base member 6 and the reinforcing member 50 are interposed between the vehicle body frame 5 and the cargo box subframe 4, the cargo box 3 can be arranged at a low position, and the center of gravity of the entire vehicle can be increased. Can be lowered.

  Further, according to the present invention, since the base members 6 mounted on the left and right body frames 5 are connected to each other by the reinforcing members 50 extending in the left and right directions, the vehicle width direction between the upper surface portions of the vehicle body frame 5 of the vehicle. It is prevented that the distance to the fluctuates. That is, the load of the cargo box 3 is loaded via the fulcrum support member 11 of the lever 10 during non-weighing, and the load of the cargo box 3 is loaded via the load cell 15 during weighing, but these fulcrum support members 11 and load cells are loaded. 15 is disposed at a position protruding to the side (outside) of the vehicle body frame 5 on the base member 6. Therefore, if the reinforcing member 50 is not provided, the load on the packing box 3 side is concentrated. The upper surface portion of the acting base member 6 and the body frame 5 is bent and deformed in a cantilever shape so as to spread outward as viewed from the front with the lower end portion of the body frame 5 as the center. By connecting the left and right base members 6 to each other, it is possible to prevent the upper surface portion of the left and right vehicle body frames 5 and the space between the base members 6 from being widened. There is improved.

  Further, the lever 10 in the weighing tightening unit U at the front side comes into contact with the mounting member 42 attached to the packing box side fixing member 16 when the packing box 3 side tries to move rearward relatively. A stopper portion 10b for preventing the packing box 3 side from moving backward is provided, and the lever 10 in the weighing tightening unit U at the rear side is relatively moved forward. Since the stopper portion 10b that contacts the attachment member 42 attached to the cargo box side fixing member 16 and prevents the cargo box 3 side from moving forward is provided, these stopper portions 10b As a result, it is possible to reliably prevent the cargo box 3 from largely moving in the front-rear direction with respect to the vehicle body frame 5 side, thereby improving reliability and safety.

  In the above-described embodiment, the sphere portion 40 is mounted on the lever load receiving member 41 attached to the lever 10. However, the present invention is not limited to this, and the lever load receiving member 41 and the sphere portion 40 are integrated. May be.

  Next, FIG. 9 is an overall side view of the garbage truck provided with the on-vehicle weighing device according to the second embodiment of the present invention, and FIG. 10 is a schematic plan view of the garbage truck body (the garbage storage tank is shown). The omitted state is indicated by a solid line, and the refuse storage tank is schematically indicated by a virtual line). Moreover, FIGS. 11-16 shows the measurement tightening unit provided in this vehicle-mounted measuring apparatus. In addition, the same code | symbol is attached | subjected to the same component as the garbage truck provided with the vehicle-mounted weighing apparatus which concerns on the said 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIGS. 8 and 10 and the like, in this garbage truck, a rubber belt 51 is laid on almost the entire surface of the upper surface of the vehicle body frame 5 except for a part. Corresponding to the rubber belt 51, a flat auxiliary fixing frame 52 is fixed to the lower surface of the packing box subframe 4 by welding or the like, and the auxiliary fixing frame 52 is placed on the rubber belt 51 during traveling. It is configured as follows. Therefore, when the vehicle is not weighed, such as when traveling, the weight of the cargo box 3 is supported by acting on the entire body frame 5 as a distributed load. In this embodiment, a measurement tightening unit V as shown in FIGS. 11 to 14 is provided in place of the measurement tightening unit U of the in-vehicle weighing device according to the first embodiment. Also in this embodiment, the measuring and tightening unit V at the front portion and the measuring and tightening unit V at the rear portion are arranged in the measuring and tightening unit V so that their constituent elements are reversed with respect to the front-rear direction. ing. In addition, in FIGS. 11-14, the measurement tightening unit V arrange | positioned in the front side location is shown. Further, each weighing tightening unit V constituting the on-vehicle weighing device of the garbage truck is disposed on the side of the packing box subframe 4. In addition, cross members 8 (see FIG. 10) that extend in the vehicle width direction and connect the left and right body frames 5 are disposed at the front and rear positions of the vehicle.

  As shown in FIG. 11 to FIG. 14 and the like, rubber belts 51 and auxiliary fixing frames 52 are provided at the front and rear positions in the side surface portion of the packing box subframe 4 where each weighing tightening unit V is provided. Notched, fixing parts each including a base member 6, a lower fixing plate (not shown), and a connecting bolt 9 for connecting them are attached. And on the base member 6 fixed to the upper surface part of the vehicle body frame 5, the fulcrum support member 61 which supports the fulcrum parts 70a and 70b of the parallel link mechanism 70 as a kind of a variation of the lever so as to be swingable, The standing member 64 that supports the link mechanism 80 and the hydraulic cylinder 63 having a structure similar to that of the above-described embodiment, and fixed so as to protrude upward from the vehicle body frame 5, prevent the cargo box 3 side from rising excessively. A floating restriction stopper 65 is attached.

  The parallel link mechanism 70 includes an upper link 71 supported so as to be swingable about the upper fulcrum portion 70a, a lower link 72 supported so as to be swingable about the lower fulcrum portion 80b, and an upper link thereof. Side-view inverted L-shaped drive-side lift links 75 connected via drive-side pins 73 and 74 provided at the rear ends of the link 71 and the lower link 72, and the front ends of the upper link 71 and the lower link 72, respectively. And a driven side elevating link 78 having a substantially T-shaped side view connected via driven side pins 76 and 77 provided in the respective parts, and a rear end portion of the driving side elevating link 75 is a link described later. It is connected to the third connecting pin 85 of the mechanism 80.

  A cylinder support bracket 66 is fixed to the standing member 64 so as to extend rearward in a U shape, and the rear end portion of the hydraulic cylinder 63 is swayed to the rear end portion of the cylinder support bracket 66 via an attachment pin 67. Installed in a movable position.

  The link mechanism 80 includes first and second link members 81 and 82 and first to third connecting pins 83 to 85. The upper end of the first link member 81 is connected to the first connecting pin 83 fitted to the extending / retracting rod portion 63 a of the hydraulic cylinder 63, and the lower end is erected via the second connecting pin 84. The lower end portion of the member 64 is connected. The second link member 82 has a lower end connected to the first connecting pin 83 and an upper end connected to a third connecting pin 85 connected to the rear end of the drive side elevating link 75. The third connecting pin 85 is regulated so as to move up and down in a vertical posture by a long hole portion 64 a provided in the standing member 64. That is, schematically, the third connecting pin 85 of the link mechanism 80 is moved up and down by the withdrawal and withdrawal rod portion 63a of the hydraulic cylinder 63, and accordingly, the drive side of the parallel link mechanism 70 is driven. While the raising / lowering link 75 raises / lowers, the driven side raising / lowering link 78 is comprised so that it may raise / lower in a reverse direction.

  On the upper surface of the front end portion of the driven side elevating link 78, a contact concave surface 78a is formed which can be brought into contact with an arcuate load receiving convex portion 53a formed so as to protrude below the load cell 53. Has been.

The load cell 53 is attached so as to face downward from the upper surface portion of the cargo box side fixing member 16 fixed to the side surface of the cargo box subframe 4.
A tightening device 90 that urges the cargo box 3 toward the vehicle body frame 5, that is, downward, to fasten the cargo box 3 to the vehicle body frame 5 is attached to the lower surface of the front end portion of the driven lift link 78. Specifically, the urging rod 91 of the tightening device 90 is attached so as to extend downward from the front end portion of the driven side lifting link 78, and the lower end portion of the urging rod 91 is attached to the lower surface portion of the cargo box side fixing member 16. It penetrates. A plurality of plates serving as elastic members for generating a tightening force are provided below the biasing rod 91 between the large-diameter portion 91a formed on the biasing rod 91 and the lower surface portion of the cargo box side fixing member 16. Tightening force transmission plates 93 and 94 with springs 92 interposed therebetween are arranged. In FIG. 11, 95 is a nut that adjusts the fixing position of the urging rod 91 up and down, and 96 is a cylindrical collar that is externally fitted to the lower portion of the urging rod 91. Further, as shown in FIG. 11, the lifting restriction stopper 65 fixed so as to protrude upward from the vehicle body frame 5 is composed of the base member 6 and the cargo box side fixing member 16 fixed to the side surface of the cargo box subframe 4. The stopper portion 65a having a diameter larger than that of the through hole formed in the lower surface portion of the cargo box side fixing member 16 is attached to the upper end thereof with a screw. When it is going to float up excessively with respect to the 5 side, the lower surface part of the cargo box side fixing member 16 comes into contact with the stopper portion 65a from below to prevent the cargo box 3 side from being lifted.

  The vehicle according to the embodiment of the present invention is also provided with a control unit as switching means (not shown) that performs the following operations. Note that a simple switching switch may be provided as the switching means.

  In the above-described configuration, the control operation and action by the control unit during non-measurement such as when the vehicle is running will be described. For ease of understanding, as shown in FIGS. 11 to 16, the case of the front-side measuring and tightening unit V will be described. However, in the case of the rear-side measuring and tightening unit V, the arrangement and the parallel link mechanism 70 are described. The moving direction of the link mechanism 80 and the like is only reversed in the front-rear direction, and the tightening operation and the weighing operation are all the same.

  As shown in FIGS. 11 to 14, when the vehicle is not running, such as when the vehicle is running, the retracting rod portion 63 a of the hydraulic cylinder 63 is retracted to the position where it protrudes most backward. In conjunction with this, the first link member 81 and the second link member 82 are bent slightly backward (the first connecting pin 83 is connected to the second connecting pin 84 and the third connecting pin 85. To the second connecting pin 84 that is fixed at a predetermined position on the vehicle body frame 5 side (standing member 64). On the other hand, the third connecting pin 85 is pushed up to a position close to the uppermost position via the first link member 81 and the second link member 82, whereby the rear end portion of the parallel link mechanism 70, that is, The drive-side lift link 75, the rear end portion of the upper link 71, and the rear end portion of the lower link 72 are pushed up. As a result, the driven lift link 78 provided at the front end of the parallel link mechanism 70 is moved downward.

  Along with this, the contact concave surface 78 a formed on the upper surface of the front end portion of the driven side lifting link 78 is brought into a posture separated from the load receiving convex portion 53 a of the load cell 53, and the cargo box 3 side is lifted through the load cell 53. It is not in the state. Therefore, the cargo box subframe 4 is in close contact with the rubber belt 51 laid on the vehicle body frame 5 via the auxiliary fixing frame 52, and the weight of the cargo box 3 is distributed as a load. It is supported by acting on the whole.

  Further, the biasing rod 91 attached so as to extend downward from the front end portion of the driven side lifting link 78 is positioned at the lower side, and the lower tightening force transmission plate 94 having a plurality of disc springs 93 interposed therebetween is loaded. It contacts the lower surface portion of the box-side fixing member 16, and the load box sub-frame 4 and the load box 3 are pushed downward by the push-down force of the driven-side lift link 78 and the biasing force of the disc spring 93, and tightened to the body frame 5 side. Thus, the cargo box 3 side is reliably prevented from floating upward with respect to the vehicle body frame 5. Thereby, it can drive | work in the stable state combined with the weight of the cargo box 3 being applied to the vehicle body frame 5 whole as distributed load.

  In this state, as shown in FIG. 11, the piston 63b of the hydraulic cylinder 63 is in a posture in which the first link member 81 and the second link member 82 exceed the straight line L ′ (beyond the dead center). Since the rear end position is set, this posture is maintained well even if the hydraulic cylinder 63 is not actively loaded with a hydraulic pressure that holds the position of the retractable rod portion 63a.

  On the other hand, at the time of weighing, with the vehicle stopped, as shown in FIG. 15, hydraulic pressure is applied to the hydraulic cylinder 63 so that the retracting rod 63a protrudes forward most. In conjunction with this, the posture in which the first link member 81 and the second link member 82 are largely bent forward (the first connecting pin 83 is connected to the second connecting pin 84 and the third connecting pin 85). The third connecting pin 85 is pulled down to a position close to the lowest position with respect to the second connecting pin 84, being in a position far forward from the connecting line L ′ (left side of the drawing in FIG. 15). Accordingly, the rear end portion of the parallel link mechanism 70, that is, the drive-side lift link 75, the rear end portion of the upper link 71, and the rear end portion of the lower link 72 are pushed down. As a result, the driven side lifting link 78 provided at the front end of the parallel link mechanism 70 is moved upward.

  Accordingly, the contact concave surface 78 a formed on the upper surface of the front end portion of the driven side lifting link 78 contacts the load receiving convex portion 53 a of the load cell 53, and the load cell 53, the auxiliary fixing frame 52, and the cargo box subframe 4 are interposed therebetween. The cargo box 3 side is lifted. Further, the biasing rod 91 attached so as to extend downward from the front end portion of the driven side elevating link 78 is located at an upper position, and the disc spring 92 is not subjected to external force. Does not act on the cargo box 3 side via the cargo box side fixing member 16.

  That is, in this state, with the fulcrum member 61 as the center, the place where the third connection pin 85 is connected in the drive side lift link 75 of the parallel link mechanism 70 is the force point, and the drive force by the hydraulic cylinder 63 acts on this force point. In addition, the load on the load box 3 side acts on the contact portion of the contact concave surface 78a as an emphasis, with the contact point of the contact concave surface 78a in the driven side lifting link 78 of the parallel link mechanism 70 as the focus on the load cell 53. . Thereby, the load on the load box 3 side acts on the load cell 53, and the load on the load box 3 side is measured.

  At this time, when the load box subframe 4 side is separated from the rubber belt 51 laid on the vehicle body frame 5 and the tightening force of the tightening device 90 is lost, the relative position between the vehicle body frame 5 and the load box 3 is determined. However, the body frame 5 is deformed in accordance with torsion of the body frame 5 due to unevenness or inclination of the installation surface, distortion due to the difference in thermal expansion between the body frame 5 and the cargo box 3, and the like. Even with this deformation, the contact position between the contact concave surface 78a of the driven side elevating link 78 and the load receiving convex portion 53a of the load cell 53 is shifted laterally, whereby a lateral load acts on the load cell 53. As a result, the load on the load box 3 side can be measured with good and high accuracy by the load cell 53. Further, at the time of measurement, the load receiving convex portion 53a of the load cell 53 is in contact with the contact concave surface 78a of the driven side lifting link 78 substantially perpendicularly by point contact, so that a lateral load acts on the load cell 53 also by this. Can be minimized, and the weighing accuracy can be increased.

  Particularly in the present embodiment, since the lever is constituted by the parallel link mechanism 70, a load can be applied from the parallel link mechanism 70 to the load cell 53 in the vertical direction (gravity direction), and the weighing is performed with high accuracy. can do. Further, since the tightening force action point where the tightening force from the tightening device 90 acts is provided on the parallel link mechanism 70 itself, the tightening force can be applied using the parallel link mechanism 70, and space saving can be achieved. Is possible.

  In addition, according to the present embodiment, since the conventional parallel link mechanism 70, the hydraulic cylinder 63, and the link mechanism 80 are provided on the vehicle body frame 5 side, a fluid pipe for driving the hydraulic cylinder 63 (not shown). Etc.) can be attached to the body frame 5 side, and can be accurately measured. In other words, when the hydraulic cylinder is provided on the cargo box 3 side, a part of the fluid piping or the like for driving the hydraulic cylinder must also be attached to the cargo box 3 side. When the box 3 is moved up and down, the weighing accuracy may be lowered by pulling the cargo box 3 side to the body frame side through the fluid piping or the like. Such a problem does not occur when it is provided.

  Also in this embodiment, the measuring and tightening unit V itself is extremely space-saving, and all of its parts are not on the side or the lower side of the body frame 5 but on the side of the cargo box subframe 4, Since it is disposed above the upper surface of the body frame 5, there is little problem with the space for disposing it, and various devices and the like are provided below the body frame 5, such as on the side of the body frame 5. It can be assembled to the garbage truck 1 and the like with a lot of good correspondence.

  In the above-described embodiment, the case where the vehicle is a garbage truck has been described. However, the present invention is not limited to this, and a similar configuration is used for a cargo box that accommodates an object to be contained therein, such as a bulk truck, a tank truck, or a vacuum truck. Needless to say, the present invention can also be applied to a vehicle carrying a container such as the above.

1 is an overall side view of a garbage truck provided with an on-vehicle weighing device according to a first embodiment of the present invention. FIG. 3 is a schematic plan view of the body of the garbage truck (the packing box is schematically indicated by a virtual line). It is a schematic side view at the time of non-weighing of the measurement tightening unit of the vehicle-mounted weighing device. It is a top view of the measurement tightening unit of the vehicle-mounted measuring apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the location of the link mechanism of the measurement tightening unit. It is a rear view at the time of non-weighing of the same measurement tightening unit. It is a schematic side view at the time of measurement of the measurement tightening unit. It is a rear view at the time of the measurement of the measurement tightening unit. It is a whole side view of the garbage truck provided with the vehicle-mounted measuring apparatus which concerns on the 2nd Embodiment of this invention. FIG. 3 is a schematic plan view of the body of the garbage truck (the packing box is schematically indicated by a virtual line). It is a schematic side view at the time of non-weighing of the measurement tightening unit of the vehicle-mounted weighing device. It is a top view of the measurement tightening unit of the vehicle-mounted weighing device. It is a longitudinal cross-sectional view of the location of the link mechanism of the measurement tightening unit. It is a rear view at the time of the non-weighing of the location in which the load cell of the same measurement tightening unit is provided. It is a schematic side view at the time of measurement of the measurement tightening unit. It is a rear view at the time of the measurement of the location in which the load cell of the same measurement tightening unit is provided.

Explanation of symbols

1 Garbage truck 3 Garbage storage tank (packing box: container)
4 Cargo box subframe 5 Car body frame 6 Base member 10 Lever 10b Stopper 11 Support point support member 12 Link mechanism 13 Hydraulic cylinder 15 Load cell 16 Cargo box side fixing member 30 Tightening device 31 Energizing rod 33 Nut 34 Disc spring (Tightening force generation Elastic member)
35 Tightening force transmission plate 40 Sphere portion 41 Lever load receiving member 42 Mounting member 43 Non-weighing load load member 43a Spherical recess 51 Rubber belt 52 Auxiliary fixed frame 53 Load cell 63 Hydraulic cylinder 65 Lifting restriction stopper 70 Parallel link mechanism (lever)
80 Link mechanism 90 Tightening device 91 Biasing rod 92 Disc spring (elastic member for generating tightening force)
93, 94 Tightening force transmission plate U, V Weighing tightening unit

Claims (13)

A container for storing the objects to be stored is mounted on the body frame,
Multiple load cells are attached to the body frame side or container side,
A tightening device for tightening the body frame side and the container side at the time of non-weighing is provided,
An on-vehicle device that calculates the weight of a contained object by supporting the container with the plurality of load cells and weighing the contents of the contained objects with the plurality of load cells in a state where the tightening action by the fastening device is released at the time of measurement. A weighing device,
It has a fulcrum that is the center of swing and a force point that applies a driving force to push up the container, and a lever is provided to lift the container from the body frame,
By combining the lifting operation of the container by the lever and the tightening operation by the tightening device, switching means for switching between the weighing state and the non-weighing state is provided ,
The switching means includes a non-weighing state in which the container lifting operation by the lever and a tightening operation by the tightening device are performed, and a weighing state in which the container lifting operation and the tightening operation by the lever are canceled and the container load is applied to the load cell. In- vehicle weighing device characterized by switching between The lever has a point where the load of the container acts when it is not weighed, and a spherical part that causes the load of the container to act in the vertical direction is interposed between the lever and the container or the body frame. The on-vehicle weighing device according to claim 1 . The in-vehicle weighing device according to claim 2 , wherein a spherical concave portion for receiving the spherical portion is provided, and the radius of curvature of the spherical concave portion is formed larger than the radius of curvature of the spherical portion. A plurality of levers and tightening devices are provided corresponding to each of the plurality of load cells, and the spherical surfaces provided corresponding to the remaining levers are larger than the radius of curvature of the spherical recesses provided corresponding to some of the levers. The in-vehicle weighing device according to claim 3, wherein the concave portion has a large curvature radius. Lever is mounted on the body frame via the support, the lever, any claim 1-4, characterized in that the stopper portion prevents the container is moved relatively forward or backward is provided The on-vehicle weighing device according to claim 1. The in-vehicle weighing device according to any one of claims 1 to 5 , wherein the lever is provided with a tightening force application point on which a tightening force from the tightening device acts. A cylinder device that generates a driving force for pushing up the container against the lever, and a link mechanism that is interposed between the cylinder device and the lever are attached to a position above the upper surface of the vehicle body frame on the vehicle body frame side. to any one of claim 1 to 6, characterized in that the fitted with a tightening force generating elastic member and the tightening force transmitting plate is urged downward to generate a tightening force to the container side container via The on-vehicle weighing device described. A fulcrum support member that supports the lever via a fulcrum, a support member such as a cylinder that supports the cylinder device and the link mechanism, and a load cell are mounted on a base member fixed on each of the left and right vehicle body frames. The base member attached on the vehicle body frame and the base member attached on the right vehicle body frame are connected by a reinforcing member extending in the left-right direction, according to any one of claims 1 to 7. The on-vehicle weighing device described.   The switching means does not perform the lifting operation of the container by the lever, but is in a non-weighing state in which the tightening operation is performed by the tightening device, and releases the tightening operation by the tightening device while performing the lifting operation of the container by the lever. The on-vehicle weighing device according to claim 1, wherein the weighing state is switched to a state in which the load is applied. The vehicle-mounted vehicle according to claim 1 or 9, wherein when the vehicle is not weighed, the container-side lifting operation by a lever is not performed, and the weight of the container is applied to and supported by the entire vehicle body frame as a distributed load. Weighing device. Vehicle weighing apparatus according to any one of claims 1, 9, 10, characterized in that the lever is constituted by a parallel link mechanism. A cylinder device that generates a driving force for pushing up the container against the lever and a link mechanism interposed between the cylinder device and the lever are provided on the vehicle body frame side. The vehicle-mounted weighing device according to any one of 9 to 11 . The lever is provided with a tightening force action point at which a tightening force from the tightening device acts, and a tightening force that generates a tightening force by urging the container downward through the lever to the tightening force action point. vehicle weighing apparatus according to any one of claims 1, 9-12, characterized in that fitted with the generation elastic member and the tightening force transmission plate.

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