JP4690492B1 - A mixer truck with a lightweight chute - Google Patents

Abstract

The present invention provides a mixer truck capable of loading and transporting a large amount of concrete within a range stipulated by laws and regulations.
SOLUTION: A pair of flow guides (5, 5) provided on the left and right in the vicinity of an opening of a drum (1) of a mixer vehicle (AM) and provided below the flow guides (5, 5). A chute (9) is formed from FRP. Resin sheets (12, 18) are attached to the inside of the flow guides (5, 5) and the chute (9). As the resin sheets (12, 18), a sheet made of high molecular polyethylene, ultra high molecular polyethylene, fluororesin, or the like that has excellent wear resistance and a low friction coefficient is applied. The mixer truck (AM) is lighter and can load a large amount of ready-mixed concrete.
[Selection] Figure 2

Description

  The present invention relates to a mixer vehicle, and more particularly, to a mixer vehicle including a self-propelled vehicle and a drum mounted on a chassis of the vehicle so as to be capable of being rotationally driven while being inclined in one direction.

  As is well known, the mixer vehicle is also called an agitator truck, and is composed of a self-propelled vehicle and a drum mounted on the chassis. The drum is mounted with its axis inclined with respect to the chassis, and is similarly driven to rotate in the forward and reverse directions by a hydraulic motor mounted on the chassis. The rear end of the drum is open, and a hopper for putting ready-mixed concrete into the drum is provided above the opening. A pair of bowl-shaped flow guides are provided around the opening so as to surround the opening from the left and right, and a chute having a bowl-like shape is also provided below the pair of flow guides. For example, a spiral blade is provided inside the drum, and when the drum is rotated in a predetermined direction, the ready-mixed concrete put into the drum can be stirred so as not to deteriorate, and in the opposite direction. When rotating, the ready-mixed concrete in the drum is carried to the opening by the blade and discharged from the opening. The ready-mixed concrete discharged from the opening is collected in a funnel shape by a pair of flow guides, falls on a chute, is guided to the chute and is unloaded. Ready-mixed concrete manufacturing equipment, that is, ready-mixed concrete manufactured in a batcher plant, is loaded onto such a mixer truck, transported, and unloaded at a construction site.

Japanese Patent No. 4364934

  Patent Document 1 describes a mixer vehicle proposed by the present inventor. The drum of the mixer car is a mirror plate located on the driver's seat side, a front shell welded to the mirror plate, a center shell welded to the front shell, and welded to the center shell toward the rear. In the mixer truck described in Patent Document 1, both or one of the front shell and the center shell is made of a steel plate that is thinner than the rear shell. . Therefore, the weight of the drum is significantly reduced as compared with the conventional drum without impairing the strength of the drum. As a result, the weight of the conventional mixer truck is reduced, and a larger amount of ready-mixed concrete can be loaded.

  Even with the conventional mixer truck as described above, the ready-mixed concrete can be transported to the placement site while maintaining a predetermined quality, so there is no particular problem with the transport itself. However, there is room for improvement in terms of transportation costs. In order to reduce the construction cost, strictly speaking, in order to reduce the transportation cost of ready-mixed concrete, the load of ready-mixed concrete per vehicle should be increased. If it does so, the frequency | count of going back and forth between a batcher plant and a setting site can be reduced, a labor cost can be saved, a fuel cost can also be saved, and a transportation cost falls. By the way, the total weight of the vehicle is regulated by law, and the mixer truck cannot exceed the total weight of the total weight of the ready-mixed concrete loaded on the vehicle. Therefore, in order to increase the amount of ready-mixed concrete per vehicle, it is necessary to reduce the weight of the mixer truck. However, if the mixer truck is simply reduced in weight, the strength is lowered, and sufficient durability cannot be obtained and safety is also impaired. Therefore, in order to reduce the weight of the mixer truck, it is necessary to provide durability without impairing necessary strength. In the mixer vehicle described in Patent Document 1, the weight of the vehicle is reduced by reducing the weight of the drum without impairing the strength and durability. Therefore, a larger amount of ready-mixed concrete can be loaded than in the past. However, in order to further increase the loading capacity of ready-mixed concrete, it is necessary to further reduce the weight of the mixer truck. In that case, improvement of the drum alone is not enough.

  Therefore, the present invention provides a mixer truck that has the required strength and can reduce the weight of the vehicle without impairing its durability, thereby allowing a large amount of ready-mixed concrete to be loaded within a range stipulated by law. It is intended to provide.

The above-mentioned object of the present invention is to form a flow guide and a chute from FRP , and a sheet made of high molecular weight polyethylene, ultrahigh molecular weight polyethylene, or fluororesin and having an adhesive surface on the back side is bonded to these. Is achieved.

That is, in order to achieve the above object, the invention according to claim 1 is mounted on a self-propelled automobile and a predetermined receiving member so as to be rotationally driven by a predetermined receiving member so that the front is lowered on the chassis of the automobile. The drum is provided with an opening at the rear end of the drum, and a pair of bowl-shaped flow guides are provided in the vicinity of the opening so as to surround the opening from the left and right sides of the pair of flow guides. A bowl-shaped chute is provided below, and when the ready-mixed concrete in the drum is discharged from the opening, the ready-mixed concrete is collected by the pair of flow guides, falls onto the chute and flows over it. a mixer truck which is adapted to be unloaded, the chute is formed from FRP, the inside, high molecular weight polyethylene, ultra high molecular weight polyethylene, also Backside with a fluorine resin is configured as a mixer truck, wherein a bonding re possible sheet that is a pressure-sensitive adhesive surface is stuck.
According to a second aspect of the present invention, there is provided a self-propelled automobile and a drum mounted on a chassis of the automobile so as to be able to be driven to rotate by a predetermined receiving member so that the front is lowered. An opening is provided at the end of the pair, and a pair of bowl-shaped flow guides are provided in the vicinity of the opening so as to surround the opening from the left and right, and a bowl-shaped chute is provided below the pair of flow guides. When the ready-mixed concrete in the drum is discharged from the opening, the ready-mixed concrete is collected by the pair of flow guides and falls onto the chute and flows over it to be unloaded. a mixer truck, the pair of flow guide is formed of FRP, the inside, to consist of high molecular weight polyethylene, ultra high molecular weight polyethylene or fluorine resin, co Backside is configured as a mixer vehicle, wherein a bonding re possible sheet that is a pressure-sensitive adhesive surface is stuck.
According to a third aspect of the present invention, in the mixer truck according to the first aspect, the pair of flow guides are formed of FRP, and on the inside thereof , high molecular weight polyethylene, ultrahigh molecular weight polyethylene, or fluororesin is used. In addition, it is configured as a mixer truck characterized in that a replaceable sheet whose back surface is an adhesive surface is pasted.

As described above, according to the present invention, since the chute is made of FRP, it is lightweight and has sufficient strength. As a result, the chute according to the present invention is significantly reduced in weight as compared with a conventional chute formed entirely by a relatively thick steel plate. Therefore, the weight of the mixer truck can be reduced and a large amount of concrete can be loaded. And since the sheet | seat made from high molecular weight polyethylene, ultra high molecular weight polyethylene, or a fluororesin is stuck inside the chute | shoot, the inner side which is easy to wear is protected and durability is also high. Since such a sheet has an adhesive surface on the back side, it only needs to be peeled off and replaced with a new sheet when it deteriorates, and the chute can be maintained easily and inexpensively. Moreover, since only the sheet needs to be replaced, a small amount of waste does not place a burden on the environment. In the invention in which a pair of flow guides are formed of FRP, and a sheet made of resin is attached to the inner side of the sheet made of high molecular weight polyethylene, ultrahigh molecular weight polyethylene, or fluororesin, as in the case of a chute, Compared to a flow guide formed of a relatively thick steel plate, the weight is significantly reduced. Therefore, a lot of concrete can be loaded. These sheets not only have excellent wear resistance, but also have self-lubricating properties and a very low coefficient of friction. Therefore, the fluidity of the concrete flowing on the flow guide or chute is very high, and the concrete thickness is also thinned. Then, since the weight of the concrete is not applied to the flow guide and the chute, it is possible to form them thinly. Then, the flow guide and chute are further reduced in weight, and more concrete can be loaded. In addition, since the fluidity is high, a small amount of concrete remains attached to the flow guide or chute. As a result, not only is the concrete wasted, but also an effect specific to the present invention that the flow guide and the chute can be easily cleaned can be obtained.

It is a rear view which shows typically the mixer truck concerning an embodiment of the invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows typically the flow guide and chute | shoot which concern on embodiment of this invention, (a) is a flow guide, (i) is a perspective view which shows a chute, respectively. It is a perspective view which shows typically the chute | shoot which concerns on the 2nd Embodiment of this invention.

  Embodiments of the present invention will be described below. As shown in the rear view of FIG. 1, the external shape of the mixer vehicle AM according to the present embodiment is the same as that of the conventional mixer vehicle. That is, it consists of a car A that is self-propelled by an engine and a drum 1 mounted on the car A. The drum 1 is rotatably mounted on the chassis of the automobile A by a predetermined front receiving member and rear receiving members 3 and 3 so that the front is low and the rear is high. Although not shown in FIG. 1, such a drum 1 is provided with a spiral blade inside, and an opening is provided at the rear end. A hopper 4 is provided above the opening of the drum 1 so that ready-mixed concrete manufactured in the batcher plant can be put into the drum 1. After the ready-mixed concrete is introduced from the hopper 4, the drum 1 is rotated in a predetermined direction. As a result, the ready-mixed concrete loaded in the drum is agitated by the blades, and deterioration of the ready-mixed concrete during transportation can be prevented.

  In the vicinity of the opening of the drum 1, the structure will be described in detail later, but the pair of flow guides 5, 5 according to the present embodiment surround the opening from the left and right and downward toward the center. It is provided to be inclined. Such flow guides 5 and 5 are fixed by a flow guide support frame 7. Further, scattering prevention sheets 8, 8, 8 for preventing the ready-mixed concrete from scattering are attached near the lower end of the flow guides 5, 5. A chute 9 according to the present embodiment is provided below the flow guides 5 and 5. More specifically, one end 9A of the chute 9 is positioned near the lower end of each of the flow guides 5 and 5, and the other end 9B is positioned on the side of the mixer vehicle AM. And the other end 9B is inclined downward. When the drum 1 is rotated in the reverse direction in the mixer vehicle AM, the ready-mixed concrete loaded inside the drum 1 is carried to the opening by the blade and discharged out of the drum 1, and is centered like a funnel by the flow guides 5 and 5. It collects toward the end and falls near one end 9 </ b> A of the chute 9. The ready-mixed concrete flows on the chute 9 and is discharged from the other end 9B. That is, the ready-mixed concrete is unloaded.

  FIG. 2A shows only the left flow guide 5 among the flow guides 5 and 5 according to the present embodiment. Since the right flow guide 5 is configured similarly, only the left flow guide 5 will be described. The flow guide 5 according to the present embodiment includes a flow guide body 11 having a bowl shape, and the flow guide body 11 is formed of FRP. Therefore, the specific gravity is smaller and lighter than steel. The drum 1 is provided with an annular concrete drool prevention portion 1A surrounding the opening, and the flow guides 5, 5 so that the concrete droop prevention portion 1A overlaps the side portions 11A of the flow guides 5, 5. Is placed. Since the side portion 11A adjacent to the drum 1 of the flow guide main body 11 is cut in an arc shape, the gap between the flow guides 5 and 5 and the concrete dripping prevention portion 1A is sufficiently small. Therefore, the ready-mixed concrete discharged from the opening of the drum 1 falls into the flow guide 5 from the concrete dripping prevention portion 1A, and the ready-mixed concrete does not sag and adhere to other parts of the drum 1.

  A resin sheet 12 is stuck inside the flow guide body 11. The resin sheet 12 is made of polyethylene having a very high molecular weight, that is, high molecular weight polyethylene, or a so-called ultrahigh molecular weight polyethylene sheet having a molecular weight of 1 million or more. Such a sheet has excellent properties such as high wear resistance and a very small coefficient of friction. The resin sheet 12 can also be composed of a fluororesin sheet. Such a resin sheet 12 is for protecting the flow guide main body 11 from abrasion, and the flow guide main body 11 only needs to cover the portion where the ready-mixed concrete flows. Therefore, in the present embodiment, the flow guide main body 11 is covered with the resin sheet 12 only at the portion corresponding to the bottom surface of the bag. The resin sheet 12 may be affixed to the flow guide main body 11 with an adhesive, but the resin sheet 12 according to the present embodiment has an adhesive surface on the back surface, and can be easily removed and replaced when deteriorated. It can be done. Although the flow guide 5 is configured in this way, the scattering prevention sheet 8 is attached to the lower end of the flow guide 5 as described above.

  The chute 9 according to the present embodiment also has a structure that is relatively similar to the flow guide 5. That is, as shown in FIG. 1A, the chute 9 includes a chute main body 17 having a bowl shape, and the chute main body 17 is also made of FRP and is lightened. A resin sheet 18 made of high molecular weight polyethylene, ultrahigh molecular weight polyethylene, fluororesin, or the like is attached to the inside of the chute body 17. This resin sheet 18 also covers only the portion corresponding to the portion where the ready-mixed concrete flows. That is, the chute body 17 covers only the portion corresponding to the bottom surface of the heel.

  Similarly to the conventional mixer truck, the mixer truck AM according to the present embodiment also loads the ready-mixed concrete manufactured in the batcher plant, transports it to the construction site, and then rotates the drum in a predetermined direction to prepare the ready-mixed concrete. Can be unloaded. Since the mixer vehicle AM according to the present embodiment is sufficiently lightened, a large amount of ready-mixed concrete can be loaded. The resin sheets 12 and 18 protecting the flow guides 5 and 5 and the chute 9 according to the present embodiment have a very small friction coefficient. Therefore, the ready-mixed concrete that is unloaded easily flows on the flow guides 5 and 5 and the chute 9, and the flow thickness is sufficiently thin. Therefore, the weight of the ready-mixed concrete applied to the flow guides 5 and 5 and the chute 9 is relatively small. Then, the flow guides 5 and 5 and the chute 9 can be formed thin. Further, since there is little raw concrete remaining on the flow guides 5 and 5 and the chute 9, only a small amount of raw concrete is wasted, and the flow guides 5 and 5 and the chute 9 can be easily cleaned. When the resin sheets 12 and 18 are worn after repeated use, they are peeled off and discarded, and new resin sheets 12 and 18 are attached to the flow guides 5 and 5 and the chute 9.

  The flow guides 5 and 5 according to the present embodiment or the chute 9 according to the present embodiment can be variously modified without being limited to the above embodiment. For example, only one of the flow guide or the chute can be configured from the flow guides 5 and 5 and the chute 9 according to the present embodiment, and the other can be configured from a conventional one. Even if it does in this way, since a mixer truck can be reduced in weight to some extent, more ready-mixed concrete can be loaded than the conventional mixer truck. Also, the range covered by the resin sheets 12 and 18 can be modified, and the entire inside of the flow guides 5 and 5 and the chute 9 can be covered, and only the portions that are relatively easily worn are covered. You may do it.

  The flow guides 5 and 5 or the chute 9 can be reinforced by a reinforcing member. FIG. 3 shows a chute 9 'according to the second embodiment, in which a reinforcing frame 19 made of steel is provided. Since the chute 9 'is reinforced by the reinforcing frame 19, it has high durability and can be used for a long time.

  As used herein, the term FRP includes regenerated FRP, ie, waste FRP.

AT mixer car A automobile 1 drum 3 rear receiving member 4 hopper 5 flow guide 7 flow guide support frame 8 scattering prevention sheet 9 chute 11 flow guide main body 12 resin sheet 17 chute body 18 resin sheet 19 reinforcing frame

Claims (3)

It comprises a self-propelled automobile and a drum mounted on a chassis of the automobile so as to be able to rotate by a predetermined receiving member so that the front is lowered, and an opening is provided at the rear end of the drum. A pair of bowl-shaped flow guides are provided in the vicinity of the opening so as to surround the opening from the left and right, and a bowl-shaped chute is provided below the pair of flow guides, respectively, and the ready-mixed concrete in the drum When the concrete is discharged from the opening, the ready-mixed concrete is collected by the pair of flow guides, and falls on the chute to flow over and be unloaded,
The chute is formed from FRP, the inside, and characterized in that the back surface is stuck is attached re available sheets has the adhesive surface with a polymer weight polyethylene, ultra high molecular weight polyethylene or fluorine resin, Mixer truck to play. It comprises a self-propelled automobile and a drum mounted on a chassis of the automobile so as to be able to rotate by a predetermined receiving member so that the front is lowered, and an opening is provided at the rear end of the drum. A pair of bowl-shaped flow guides are provided in the vicinity of the opening so as to surround the opening from the left and right, and a bowl-shaped chute is provided below the pair of flow guides, respectively, and the ready-mixed concrete in the drum When the concrete is discharged from the opening, the ready-mixed concrete is collected by the pair of flow guides, and falls on the chute to flow over and be unloaded,
The pair of flow guide is formed of FRP, the inside, that the back surface is stuck is attached re available sheets has the adhesive surface with a polymer weight polyethylene, ultra high molecular weight polyethylene or fluorine resin, A mixer truck characterized by 2. The mixer truck according to claim 1, wherein the pair of flow guides is formed of FRP , and is attached inside thereof with a high-molecular-weight polyethylene, an ultra-high-molecular-weight polyethylene, or a fluororesin, and a back surface that is an adhesive surface. A mixer truck characterized by a replaceable sheet.

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