JP5485084B2 - Transportation vehicle safety device with weighing device - Google Patents

Description

  The present invention relates to a safety device for a transport vehicle including a weighing device that can weigh the weight of an object loaded on a loading platform as it is, and more specifically, in a load support portion of a plurality of pairs of load cell units. The present invention relates to a safety device that prevents the worst situation that even when the loading platform cannot be supported, the loading platform slides greatly in the front-rear direction or the width direction of the transport vehicle or the loading platform falls from the chassis.

  In the present specification, "chassis" is a pair of left and right continuously disposed over the entire length of the transport vehicle in the lowest part except for wheels in a transport vehicle equipped with a loading platform, A beam-like member that supports the driver's seat frame, cargo bed, etc. “Chassis” is often translated into “body” or “chassis”. In this specification, “weighing” means measuring the weight of an object.

  As a transport vehicle provided with the weighing device having the above-described configuration, devices disclosed in Patent Documents 1 and 2 are known. A total of four load cell units are fixedly arranged on the upper surfaces of a pair of left and right chassis arranged in the direction, and the load support portion at the free end of each load cell unit supports the load carrier and the object to be loaded on the load carrier. By doing so, the weight of the load is measured while being loaded.

  As described above, since the load cell units disclosed in Patent Documents 1 and 2 are both arranged on the upper surface of the chassis of the transport vehicle, the height of the loading platform is compared with the case where the load cell unit is not used. Thus, the height is inevitably increased by the height of the load cell unit. As a result, the position of the center of gravity of the object loaded on the loading platform is increased by the height of the load cell unit, and there is a problem that the stability during traveling is reduced by that amount.

  Therefore, the inventor of the present application attaches the load cell unit to the outer surface of the chassis, not the upper surface of the pair of left and right chassis, via the mounting base, thereby increasing the center of gravity of the object loaded on the loading platform. Got the idea to prevent. Under this concept, the body manufacturer prohibits other objects from being fixed to the chassis by welding, so multiple bolts are used to fix the mounting base to the outer surface of the chassis. I must. When the mounting base is fixed to the chassis with a plurality of bolts, there is a risk of the bolts breaking as a result of repeated stresses mainly consisting of shearing forces, and the bolts break. There is a case where the support of the loading platform by each load support portion of the load cell unit is biased or the support by the load support portion of a specific load cell unit becomes impossible. In addition, the load support unit of the load cell unit is provided with a bearing, and has a structure that supports the load of the load via the bearing. There is also a possibility that a situation in which sliding in the front-rear direction or the width direction is allowed will occur. When such a situation occurs, the loading platform slides back and forth, left and right with respect to the chassis, and the loading platform moves greatly back and forth and left and right with respect to the chassis. In the worst case, the loading platform falls from the chassis. There is a danger of end.

Japanese Patent Laid-Open No. 2001-74540 Japanese Patent Application Laid-Open No. 2004-069323

  In the present invention, even if the load cell unit mounting bolts on the outer surfaces of the pair of left and right chassis or the bearings built in the load cell unit are damaged or damaged, the loading platform is front and rear and left and right with respect to the pair of chassis. It is an object to provide a safety device that prevents the carrier from falling greatly in the worst case.

In order to solve the above-mentioned problem, the invention of claim 1 is directed to a plurality of sets of load cell units attached to a pair of left and right chassis of a transport vehicle as a pair of left and right pairs with a predetermined interval in the front-rear direction. And a loading platform in which a bottom plate portion is reinforced by a reinforcing vertical member or a horizontal member, and a necessary gap is formed between the upper surfaces of the pair of left and right chassis and the reinforcing vertical member or the horizontal member. In the transport vehicle provided with a weighing device having a configuration in which the reinforcing vertical member or the cross member is connected to each load support portion of the free end portion of the plurality of pairs of load cell units, the reinforcing vertical member or the cross member, A safety rod member having a safety rod protruding in the horizontal direction is integrally attached to one of the pair of chassis, and a gap is formed around the entire circumference of the safety rod on the other side. B. The load cell unit and the reinforcing vertical member or cross member are provided by attaching a rod hole member having a hole to a single body and providing a plurality of anti-slip devices combining the safety rod member and the rod hole member. When the connection with the pair of chassis is released, the loading platform does not slide beyond the set amount in the front and rear direction, the width direction, and the height direction with respect to the pair of chassis. A plurality of sets of load cell units are attached to the outer surface via load cell unit mounting bases, and each fixing plate portion that fixes the pair of left and right load cell unit mounting bases to the pair of chassis is arranged in the width direction on the upper surfaces of the pair of chassis. are connected by a chassis connecting plate disposed, said safety rod member, and one of the rod hole member, that is attached to the chassis connection plate It is a symptom.

  According to the first aspect of the present invention, a reinforcing vertical member or a cross member is interposed in each load supporting portion of the free end portion of a plurality of sets of load cell units arranged in a one-to-one pair arranged at a predetermined interval in the front-rear direction. In a state where the loading platform is integrally connected, the plurality of locking devices prevent the loading platform from sliding beyond a set amount in the three directions of the front-rear direction, the width direction, and the height direction with respect to the pair of chassis. Therefore, even if the connection between the load support part of the load cell unit and the reinforcing vertical member or cross member provided on the back side of the bottom plate part of the loading platform is released for some reason, a plurality of locking devices are used. The slide exceeding the set amount in the three directions is prevented, and the worst situation that the loading platform falls from the pair of chassis can be prevented.

  On the other hand, in a state where the load bed is normally supported by the load support portions of the plurality of pairs of load cell units via the reinforcing vertical member or the horizontal member, the safety rod inserted through the rod hole of the rod hole member is Since a predetermined gap is formed over the entire circumference with respect to the rod hole and keeps non-contact, the normal weight of the load on the loading platform is weighed by the plurality of pairs of load cell units.

Further, according to the invention of claim 1 can be attached to one of any of the safety rod member in position, and the rod hole member along the width direction of the chassis coupling plate for coupling along a pair of chassis in the width direction As a result, the layout design of the locking device is facilitated. Further, since the pair of chassis are coupled by the chassis coupling plate, the coupling rigidity including the torsional rigidity of the pair of chassis is increased, and the durability of the load cell unit is enhanced.

  According to the present invention, the loading platform is provided to each load supporting portion of the free end portion of the plurality of sets of load cell units arranged at a predetermined interval in the front-rear direction via the reinforcing vertical member or the cross member. In a state of being integrally connected, the load carrier is configured not to slide beyond a set amount in the three directions of the front-rear direction, the width direction, and the height direction with respect to the pair of chassis by a plurality of locking devices. Therefore, even if the connection between the load supporting portion of the load cell unit and the reinforcing vertical member or the cross member provided on the back surface side of the bottom plate portion of the loading platform is released for some reason, the three anti-removal devices can Slides that exceed the set amount of direction are prevented, and the worst situation that the loading platform falls from the pair of chassis can be prevented. Further, in the state where the load bed is normally supported by the load support portions of the plurality of pairs of load cell units arranged in the front-rear direction via the reinforcing vertical member or the horizontal member, the load hole is inserted into the rod hole of the rod hole member. The safety rod has a predetermined gap all around the rod hole and maintains non-contact, so that the normal weight of the load on the loading platform is weighed by multiple sets of load cell units. Is done.

2 is a side view of a transport vehicle T in which a loading platform 51 is fixed via a loading platform frame F to two pairs of front and rear load cell units U attached to the outer surfaces of a pair of left and right chassis C. FIG. It is a back view similarly. (A), (b) is the partial rear view of the load cell unit U, and a right view, respectively. FIG. 4 is a perspective view of a state in which two pairs of front and rear load cell units U are attached to the outer surfaces of a pair of left and right chassis C. It is the perspective view which looked at the state which isolate | separated the left-right paired load cell unit U and the loading platform frame F from diagonally downward. 4 is a partial perspective view mainly showing the insertion relationship of the safety rod R of the cargo bed frame F with respect to the rod hole H of the rod hole member E fixed to the chassis connecting plate 17. FIG. FIG. 3 is an overall perspective view of a state in which a loading frame F is fixed to a pair of chassis C so as not to slide beyond a set amount in both the front-rear direction X and the width direction Y. It is also a plan view. FIG. 4 is a view showing a state in which a safety rod R is inserted into a rod hole H.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to FIGS. FIG. 1 is a side view of a transport vehicle T in which a loading platform 51 is fixed to a pair of front and rear load cell units U attached to the outer side surfaces of a pair of left and right chassis C via a loading platform frame F. FIG. FIGS. 3A and 3B are a partial rear view and a right side view of the load cell unit U, respectively, and FIG. 4 shows two pairs of front and rear load cells on the outer surface of the pair of left and right chassis C. FIG. 5 is a perspective view of a state in which the pair of left and right load cell units U and the loading frame F are separated from an oblique lower side, and FIG. 6 is a chassis connection state. FIG. 7 is a partial perspective view mainly showing the insertion relationship of the safety rod R of the load carrier frame F with respect to the rod hole H of the rod hole member E fixed to the plate 17, and FIG. 7 shows the load carrier frame F with respect to the pair of chassis C. Front and rear direction X and It exceeds the set amount for both the width direction Y is an overall perspective view of a fixed state so as not to slide, FIG. 8 is a plan view of the same.

As shown in FIGS. 1 to 3, the basic structure of the transport vehicle T that loads and loads the load L on the loading platform 51 is such that a pair of left and right chassis C are arranged over almost the entire length of the transport vehicle T. Thus, two pairs of front and rear load cell units U are attached to the outer surfaces of the pair of chassis C, and the cargo bed frame F is connected to the pair of left and right chassis C via a total of four load cell units U. A loading platform 51 is fixed to the upper surface of the vehicle, and a driver's seat frame 52 is attached to a portion of the pair of left and right chassis C reaching the driver's seat. The two pairs of front and rear load cell units U are respectively attached to the rear end portion of the loading platform 51 on the outer side surfaces of the pair of left and right chassis and the respective portions corresponding slightly behind the front end portion via the load cell unit mounting base S. Yes. In FIGS. 1 and 2, W ₁ and W ₂ indicate a front wheel and a rear wheel of the transport vehicle T, respectively.

In addition, the upper and lower end portions of the chassis C in the width direction are both bent inward to increase the bending rigidity. The load cell unit mounting base S fixed to the outer surface of the chassis C includes a fixing plate portion 1 directly fixed to the outer surface of the chassis C via a plurality of bolts B ₁ , and the fixing plate portion 1. The mounting plate portion 3 is integrally attached to the center portion in the height direction on the outer side surface while being supported from below by a pair of left and right support plate portions 2. The load cell unit U includes a base end fixing portion 11 fixed to the load cell unit mounting base S, an intermediate load cell portion 12 in which the load cell is incorporated, and a bearing frame (not shown) through an internal bearing (not shown). , And the load support portion 13 that distributes and supports the load of the load L of the loading platform 51. As shown in FIGS. 3 and 5, a plurality of pairs of unit fixing plates 4 are provided on the upper surface of the mounting plate portion 3 of the load cell unit mounting base S at a predetermined interval along the front-rear direction X of the transport vehicle T. is a vertically through the bolt B ₂ fixed, secure the fixing portion 11 of the load cell unit U cantilevered by the pair of the unit fixing plate 4. A pair of support plate portions 15 spaced from each other along the width direction Y of the transport vehicle T are fixed to the back surface of the load cell side connection plate 14 for connecting the loading frame F. The pair of support plates The load support portion 13 of the load cell unit U is inserted between the portions 15, and the pair of support plate portions 15 and the load support portion 13 are connected to each other via a connecting pin 16.

As shown in FIGS. 2, 4, and 6, the two pairs of front and rear load cell unit mounting bases S are connected to each other by a chassis connecting plate 17. That is, the upper ends of the fixed plate portions 1 constituting the pair of left and right load cell unit mounting bases S are connected to each other by the two chassis connecting plates 17 spaced apart from each other along the front-rear direction X of the transport vehicle T. Yes. The connection between each fixed plate portion 1 and the end portion of the chassis connecting plate 17 is by welding. As a result, the pair of left and right chassis C are connected to each other via the fixed plate portion 1 and the chassis connecting plate 17 of the load cell unit mounting base S at the portion where the two pairs of front and rear load cell units U are arranged, and torsional rigidity is increased. The main connection rigidity is improved. In order to prevent the load cell unit U from slightly moving in the height direction Z with respect to the chassis C, below the lower bent portion C ₂ of the chassis C on the back surface of the fixed plate portion 1 of the load cell unit mounting base S. The fine movement regulating member 18 is fixed. As a result, in the arrangement portion of the two front and rear load cell units U, the upper and lower bent portions C ₁ and C ₂ of the pair of left and right chassis C are sandwiched between the chassis connecting plate 17 and the fine movement restricting member 18, respectively. The load cell unit mounting base S is prevented from slightly moving in the height direction Z with respect to the chassis C.

  Further, the loading platform frame F is a member that is integrally attached to the back surface of the bottom plate portion 53 of the loading platform 51 and reinforces the entire loading platform 51 including the bottom plate portion 53, as shown in FIGS. 5 to 8. In addition, a member formed by assembling vertically and horizontally shaped molds 21 and 22 having a vertically rectangular cross section, between the two longitudinal molds 21 at both ends in the width direction Y, and in the front-rear direction X Frame side connecting plates 23 are integrally provided at a total of four locations on both ends. The frame side connecting plate 23 is disposed so as to coincide with the lower surface of the loading frame F, and in order to increase the bending strength, a reinforcing plate 24 is provided in the center in the front-rear direction X of the frame side connecting plate 23 in the width direction Y. It stands up along and is provided integrally.

Then, as shown in FIG. 5, the load cell frame F is placed on the upper surface of a total of four load cell side connection plates 14 attached to the load support portion 13 of each load cell unit U, and the load cell attached to the load cell unit U is loaded. When the side connection plate 14 and the frame side connection plate 23 attached to the loading frame F are connected by a plurality of bolts B ₃ (see FIG. 3B), the load support portions 13 of the four load cell units U in total. The cargo bed frame F is connected to the unit. Thereby, between the lower surface of the carrier frame F and the upper bent portion C ₁ of the chassis C, the carrier frame F is deformed in the height direction Z of the carrier frame F during the transportation of the load L. A necessary clearance 31 (see FIGS. 1 to 3) is formed in which F does not contact the upper bent portion C ₁ of the chassis C. Further, in a state where two pairs of front and rear load cell units U are attached to the pair of chassis C via the load cell unit mounting base S, all of the load cell units U are arranged with the load support portions 13 facing the front of the vehicle. Yes.

  Further, as shown in detail in FIGS. 2 to 8, the inner surface of the second two mold members 21 counted from both sides of the total five mold members 21 constituting the loading frame F are counted. In addition, safety rod members A are fixed by welding at a total of four locations corresponding to the mounting positions of the pair of front and rear chassis connecting plates 17 with respect to the pair of left and right chassis C. That is, the safety rod member A is the central portion in the longitudinal direction of the rectangular fixed plate portion 41, and the safety rod R is horizontal in a portion slightly lower than the central portion in the height direction in the arrangement state. It is fixed by welding. Note that a pair of welded portion securing holes 42 are formed on both sides of the safety rod R in the fixed plate portion 41, and the fixed plate portion 41 is used as a cargo bed by utilizing the inner peripheral surface of each welded portion securing hole 42. The frame F is fixed to the longitudinal mold 21 by welding.

Further, as shown in detail in FIGS. 2 to 8, a pair of front and rear chassis connecting plates 17 which are portions corresponding to a total of four safety rod members A attached to the cargo bed frame F in the pair of chassis C. A rod hole member E corresponding to the safety rod member A is fixed to both ends of the transport vehicle T in the width direction Y by a plurality of bolts B ₄ . That is, the rod hole member E is disposed vertically along the width direction of the chassis connecting plate 17 and the fixing plate portion 43 fixed along the width direction of the chassis connecting plate 17. It consists of a rod hole forming plate portion 45 that is supported by a pair of support plate portions 44 and fixed to the outer end portion in the width direction. The rod hole forming plate portion 45 is formed with a rod hole H through which the safety rod R is inserted. The safety rod member A and the rod hole member E are combined to constitute a detachment prevention device J that prevents the loading platform 51 from being detached from the pair of chassis C.

The relationship between the safety rod R of the safety rod member A and the rod hole H of the rod hole member E through which the safety rod R is inserted is as described above. In the state where the load cell side connecting plate 14 of the support portion 13 and each frame side connecting plate 23 provided on the loading frame F are connected by a plurality of bolts B ₃ , as shown in FIG. The centers of the safety rods R inserted through the rod holes H are in agreement with each other. As a result, a gap 46 having the same interval is formed over the entire circumference of the safety rod R inserted through the rod hole H, and the safety rod R is not in contact with the inner peripheral surface of the rod hole H. Thus, the weight of the load L on the loading platform 51 can be measured. Further, as shown in FIG. 3A, in the state where the loading platform frame F is connected and attached to the load supporting portions 13 of the total four load cell units U as described later, the safety rod member A A predetermined assembly gap D is formed between the fixed plate portion 41 and the rod hole forming plate portion 45 of the rod hole member E, and the safety rod R has a length from the rod hole forming plate portion 45. The protrusion length K is larger than the assembly gap D. In FIG. 9, the welded portion securing hole 42 is not shown.

  When the rod hole member E is attached (fixed) to the chassis connecting plate 17, as shown in FIGS. 4 and 6, when the four rod hole members E are divided into left and right parts, The individual rod hole members E are retrofitted from the viewpoint of assembly. The loading platform 51 placed on the loading platform frame F is fixed to the vertical and horizontal mold materials 21 and 22 of the loading platform frame F via a large number of bolts (not shown).

  For this reason, the weight of the load L loaded on the loading platform 51 is distributed to the load support portions 13 of each of the four load cell units U and is weighed by the four load cell units U in total. By adding each weight, the weight of the load L is weighed. When weighing the load L, as shown in FIG. 9, the safety rod R of the safety rod member A inserted through the rod hole H of the rod hole member E has a clearance 46 over its entire circumference. Since the safety rod R is not in contact with the rod hole H, the exact weight of the load L is weighed. The load measurement principle of the load cell unit U is obtained by converting the mechanical strain of the load cell built in the load cell unit into an output voltage and measuring it. The load cell unit U is widely used in the industry and widely known.

When the transport vehicle T is being used, even if the bolt B ₁ that attaches the load cell unit U to the outer surface of the pair of chassis C or the bearing or the like in which the load cell unit U is installed is damaged, A safety rod R attached integrally to the load carrier frame F side is inserted along the width direction Y of the transport vehicle T in the rod hole H of the rod hole member E fixedly attached to the pair of chassis C sides. Therefore, when the safety rod R comes into contact with the inner peripheral surface of the rod hole H, the loading platform frame F, that is, the loading platform 51 is greatly slid in the front-rear direction X with respect to the pair of chassis C. Can be prevented. Further, a pair of left and right rod hole members E are attached to the chassis connecting plate 17, and the rod hole forming plate portion 45 of the rod hole member E and the fixing plate of the safety rod member A fixed to the loading frame F side. Since only a small assembling gap D is formed between the portion 41 and the pair of rod hole members E, the load carrier frame F slides in the width direction Y with respect to the pair of chassis C. It functions as a width direction restricting member that restricts this, and the load carrier frame F is also prevented from sliding in the width direction Y. Furthermore, it is possible to prevent the loading platform 51 from bouncing upward (sliding in the Z direction) with respect to the pair of chassis C.

  In addition, in the said Example, although the load support part 13 of all the load cell units U is arrange | positioned facing the front of the transport vehicle T, it is also possible to arrange | position facing the back. Moreover, in the said Example, although two pairs of load cell units U are provided before and behind, when the loading platform 51 is long, three or more pairs of load cell units U may be provided.

  The above-described embodiment is merely an example of the present invention, and various modifications as shown below are possible to achieve the object of the present invention. In the above embodiment, a total of four rod hole members E are used by attaching a pair of left and right rod hole members E that also serve as width direction regulating members to the respective front and rear chassis connecting plates 17. However, the rod hole member E can be attached to the longitudinal mold 21 of the loading frame F and the safety rod member A can be provided on the chassis connecting plate 17 by being reversely arranged with respect to the above embodiment. In addition, the object of the present invention can be achieved by using only the two rod hole members E arranged along the diagonal direction. In addition, the rod-direction member E is attached to only one side of the pair of left and right chassis C, and the width-direction regulating member that prevents the loading frame F from sliding in the width direction Y is attached to the other side. By providing this, it is possible to prevent the loading frame F from sliding in both the front-rear direction X and the width direction Y with respect to the pair of chassis C.

  Further, in the above embodiment, the safety rod faces the width direction of the transport vehicle, and the anti-slip device relating to the combination of the safety rod member and the rod hole member prevents the loading platform from sliding in the front-rear direction with respect to the pair of chassis. The slide in the width direction of the loading platform is prevented by the arrangement of a pair of locking devices and reinforcing vertical members arranged on the left and right, but on the contrary, safety rods are arranged in the longitudinal direction of the transport vehicle. And it is also possible to comprise so that sliding of the loading platform with respect to a pair of chassis in the width direction may be prevented by the detachment prevention device.

  Furthermore, the above-described embodiment is an example in which a plurality of pairs of load cell units U are attached to the outer sides of the pair of chassis C, whereby the center of gravity position of the load L loaded on the loading platform 51 is lowered, There is an advantage that the traveling of the vehicle during transportation is stabilized and the load when loading and unloading the load L is manually reduced. However, the present invention is also applicable to a transport vehicle having a configuration in which a plurality of pairs of load cell units are attached to the upper surfaces of a pair of chassis. In this case, the safety rod member or rod hole member provided on the side of the pair of chassis is mounted in a bracket shape extending to the reinforcing vertical member or cross member provided on the back surface of the bottom plate portion of the loading platform. It is attached via a member.

A: Safety rod member
C: Chassis
D: Assembly gap
E: Rod hole member
F: Cargo frame
H: Rod hole
J: Stopper device
L: Loaded item
R: Safety rod
S: Load cell unit mounting base
T: Transport vehicle
U: Load cell unit
X: Front and rear direction of transport vehicle
Y: Transport vehicle width direction
Z: Height direction
1: Fixed plate part of load cell unit mounting base
13: Load support unit of load cell unit
17: Chassis connecting plate
21: Longitudinal mold (reinforcing vertical)
22: Mold material in the transverse direction (cross member for reinforcement)
31: Necessary clearance between a pair of chassis and carrier frame
51: Loading platform

Claims (1)

The bottom plate is reinforced by a pair of left and right chassis of a transport vehicle and a pair of left and right load cell units attached at predetermined intervals in the front-rear direction and a plurality of reinforcing vertical members or horizontal members. Each load on the free ends of the plurality of pairs of load cell units, so that a necessary gap is formed between the upper surfaces of the pair of left and right chassis and the reinforcing vertical member or cross member. In a transport vehicle provided with a weighing device having a configuration in which the reinforcing vertical member or cross member is connected to a support portion,
A safety rod member having a safety rod protruding in the horizontal direction is integrally attached to one of the reinforcing vertical member or the horizontal member and the pair of chassis, and the safety rod is attached to the other one. A rod hole member having a rod hole to be inserted in a state where a gap is formed over the entire circumference is integrally attached,
When a connection between the load cell unit and the reinforcing vertical member or cross member is released by providing a locking device combining the safety rod member and the rod hole member at a plurality of locations, a pair of chassis are provided. The loading platform does not slide beyond the set amount in the three directions of the front and rear direction, the width direction and the height direction ,
A plurality of sets of load cell units are attached to the outer side surfaces of the pair of chassis via the load cell unit mounting base, and each fixing plate portion that fixes the pair of left and right load cell unit mounting bases to the pair of chassis is provided on the pair of chassis. It is connected to the upper surface by a chassis connecting plate arranged in the width direction, and one of the safety rod member and the rod hole member is attached to the chassis connecting plate. apparatus.

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