JP6300697B2 - Mixer truck - Google Patents

Description

  The present invention relates to a mixer truck including a mixer drum on which ready-mixed concrete can be mounted.

  When the ready-mixed concrete is transported by the mixer truck and the temperature of the ready-mixed concrete changes greatly, the properties of the ready-mixed concrete change. For this reason, it is desired to control the temperature of the ready-mixed concrete when the ready-mixed concrete is transported by the mixer truck.

  Patent Document 1 discloses a ready-mixed concrete management system that uses a wireless IC tag that has a temperature measuring function of ready-mixed concrete for each transport lot from a kneading place to a placement place and is given an ID number for information identification. It is disclosed.

  Patent Document 1 describes measuring the temperature of ready-mixed concrete using a non-contact type radiation thermometer (see paragraph [0027]). The radiation thermometer measures the amount of energy such as infrared rays emitted from the ready-mixed concrete, and measures the temperature of the ready-mixed concrete.

JP 2011-129014 A

  In a mixer vehicle, a mixer drum on which ready-mixed concrete is mounted is provided with a drum opening that opens at one end thereof, and a hopper that guides the ready-mixed concrete to be input is provided in the drum opening. A blade for stirring the ready-mixed concrete is provided inside the mixer drum.

  In order to prevent the ready-mixed concrete thrown into the mixer drum from the hopper from being applied to the radiation thermometer at a kneading place or the like, it is necessary to install the radiation thermometer outside the hopper. When the radiation thermometer is installed outside the hopper, the infrared radiation emitted from the ready-mixed concrete that is stirred in the mixer drum may interfere with the blades, etc., and may not be guided to the receive thermometer. There is a problem that it is difficult to measure accurately.

  The present invention has been made in view of the above-mentioned problems, and prevents the ready-mixed concrete put into the mixer drum from being applied to the temperature detector and accurately measures the temperature of the ready-mixed concrete stirred in the mixer drum. With the goal.

  The present invention relates to a mixer truck including a mixer drum on which ready-mixed concrete can be mounted. A drum opening that opens in the mixer drum, a hopper that guides ready-mixed concrete that is put into the drum opening, and the temperature of the ready-mixed concrete in the mixer drum are not contacted. And a support mechanism for supporting the temperature detector movably from a retracted position outside the hopper to a measurement position facing the inside of the mixer drum through the inside of the hopper. To do.

  According to the present invention, when fresh concrete is put into the mixer drum, the temperature detector is moved by the support mechanism to the retracted position outside the hopper. Thereby, the ready-mixed concrete thrown into a mixer drum can be prevented from applying to a temperature detector. On the other hand, when measuring the temperature of the ready-mixed concrete mounted on the mixer drum, the temperature detector is moved by the support mechanism from the retracted position to the measurement position facing the inside of the mixer drum through the inside of the hopper. Thereby, the light beam radiated from the ready-mixed concrete stirred in the mixer drum is guided to the temperature detector without interfering with the blade or the like, and the temperature of the ready-mixed concrete can be measured with high accuracy.

It is a top view of the mixer truck concerning a 1st embodiment of the present invention. It is a side view of the mixer truck concerning a 1st embodiment of the present invention. 1 is a side view showing a part of a mixer truck according to a first embodiment of the present invention. It is a side view which shows a part of mixer truck which concerns on 2nd Embodiment of this invention. It is a side view which shows a part of mixer truck which concerns on 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(First embodiment)
With reference to FIG. 1A and FIG. 1B, the whole structure of the mixer vehicle 100 is demonstrated. The mixer vehicle 100 includes a cab 11, a mixer drum 2 that is rotatably provided on the vehicle body 1, and a drive device 4 that rotationally drives the mixer drum 2. The mixer vehicle 100 is a vehicle that carries and transports ready-mixed concrete in the mixer drum 2. In addition, illustration of the drive device 4 etc. is abbreviate | omitted in FIG. 1B.

  The mixer drum 2 is a bottomed cylindrical container that is rotatably mounted on the vehicle body 1 and has a drum opening 2A at its rear end. The mixer drum 2 is mounted so as to incline so that the rotation axis O becomes higher from the front to the rear of the vehicle.

  Inside the mixer drum 2, a pair of blades 6 and 7 projecting from the inner wall and extending in a spiral shape are provided. A cylindrical seal pipe 8 is provided inside each blade 6 and 7 of the drum opening 2A. A hopper 16 connected to the seal pipe 8 is provided above the rear side of the drum opening 2A. A flow guide 19 and a chute 18 are provided below the drum opening 2A.

  The drive device 4 rotationally drives the mixer drum 2 with a working fluid pressure that circulates using the traveling engine 3 as a power source. The drive device 4 switches the rotation direction of the mixer drum 2 and adjusts the rotation speed of the mixer drum 2 according to a command from the controller 10.

  In a kneading place such as a ready-mixed concrete manufacturing plant, ready-mixed concrete is made by kneading concrete raw materials such as cement, aggregate and water by a mixer. The ready-mixed concrete put into the hopper 16 by the charging machine at the kneading place is guided by the hopper 16 and the seal pipe 8 and is put into the mixer drum 2 from the drum opening 2A.

  The mixer truck 100 transports the ready-mixed concrete put into the mixer drum 2 at the kneading location to the placement location. When the mixer vehicle 100 is traveling, the mixer drum 2 is rotated forward in order to maintain the quality of the ready-mixed concrete. Thereby, the ready-mixed concrete in the mixer drum 2 is agitated by being sent from the drum opening 2A side of the mixer drum 2 to the tip 2B side (from right to left in FIGS. 1A and 1B) by the rotating blades 6 and 7. Kneading is performed and the solid concrete is prevented from solidifying.

  When the mixer truck 100 arrives at the placement site, the ready-mixed concrete discharged from the mixer drum 2 is placed. When discharging the ready-mixed concrete, the mixer drum 2 is reversed. Thereby, the ready-mixed concrete in the mixer drum 2 is sent from the front to the rear of the mixer drum 2 by the rotating blades 6 and 7, and is discharged from the drum opening 2A. The ready-mixed concrete discharged from the drum opening 2 </ b> A is guided to the placement site by the flow guide 19 and the chute 18.

  The mixer vehicle 100 is provided with a hopper cover 35 that opens and closes the hopper 16. The hopper cover 35 is formed in a lid shape that covers the hopper opening 16 </ b> A that opens to the hopper 16.

  As shown in FIG. 2, the front end portion of the hopper cover 35 is rotatably supported via the shaft 17. The shaft 17 is disposed so as to extend in the left-right direction of the vehicle along the opening end 16 </ b> B in front of the hopper 16. The hopper cover 35 opens and closes the hopper opening 16A by rotating in the front-rear direction of the vehicle as shown by an arrow D in FIG.

  An actuator 15 that opens and closes the hopper cover 35 is provided at a position located above the front side of the hopper 16 in the vehicle body 1. The actuator 15 includes an electric motor (not shown) and a speed reducer (not shown) that decelerates the rotation of the electric motor and transmits it to the shaft 17. The actuator 15 is operated by a switch operation by the driver, and rotates the hopper cover 35 in the opening direction or the closing direction via the shaft 17.

  When the hopper cover 35 is in the closed position as shown by a solid line in FIG. 2, the hopper opening 16 </ b> A is covered by the hopper cover 35. This prevents dust and rainwater from entering the mixer drum 2 from the hopper 16 when the ready-mixed concrete is transported by the mixer truck 100.

  The hopper cover 35 is moved forward from the closed position to the open position indicated by a two-dot chain line in FIG. The hopper cover 35 in the open position is disposed above the mixer drum 2. Thereby, when fresh concrete is thrown into the mixer drum 2, the hopper opening 16A is opened.

  By the way, when the ready-mixed concrete is transported by the mixer truck 100 in a state where the outside air temperature is high and the amount of solar radiation is large, such as in summer, the surface temperature of the mixer drum 2 increases, and the ready-mixed concrete in the mixer drum 2 is transferred by heat transfer from the mixer drum 2. The temperature may increase gradually. When the temperature of ready-mixed concrete increases, the properties of ready-mixed concrete change.

  As a countermeasure, the mixer vehicle 100 includes a sensor 25 (temperature detector) that detects the temperature of the ready-mixed concrete in the mixer drum 2 and a temperature management device 20 that manages the temperature of the ready-mixed concrete based on the detection signal from the sensor 25. (See FIG. 1A).

  The temperature management device 20 displays information that the temperature of the ready-mixed concrete changes according to the operation time and time of the mixer drum 2, and this information is transmitted to a server computer via a transmission / reception device (not shown) and an information line network such as the Internet. (Not shown). This information is recorded on the server computer.

  Next, a configuration in which the sensor 25 is provided in the mixer truck 100 will be described with reference to FIG.

  The sensor 25 is provided with a radiation thermometer that measures the amount of infrared energy emitted from the ready-mixed concrete as a temperature detector that measures the temperature of the ready-mixed concrete without contact. The temperature detector is not limited to a radiation thermometer, and may be one that measures temperature according to visible light emitted from ready-mixed concrete.

  The mixer vehicle 100 is provided with a support mechanism 40 that supports the sensor 25 through the inside of the hopper 16. The support mechanism 40 has a function of switching the sensor 25 between a retracted position provided outside the hopper 16 and a measurement position directed to the front end portion 2B in the mixer drum 2. The support mechanism 40 is configured to move the sensor 25 from the retracted position to the measurement position through the inside of the hopper 16.

  In the present embodiment, a hopper cover 35 that opens and closes the hopper 16 and a rod-like arm 41 that supports the sensor 25 on the hopper cover 35 are provided as the support mechanism 40. The base end of the arm 41 is fixed to the central portion of the hopper cover 35, and the sensor 25 is attached to the tip end of the arm 41.

  When the hopper cover 35 is in a closed position covering the hopper opening 16A as shown by a solid line in FIG. 2, the sensor 25 is in a measurement position facing the drum opening 2A from the inside of the hopper 16 via the hopper cover 35 and the arm 41. Supported. The sensor 25 at the measurement position is arranged along the rotation axis O of the mixer drum 2 and is directed from the center of the drum opening 2A toward the front end 2B of the mixer drum 2 through the space inside the seal pipe 8 and the blades 6 and 7. It is done.

  When measuring the temperature of the ready-mixed concrete, infrared rays radiated from the ready-mixed concrete are guided to the sensor 25 through the spaces inside the blades 6 and 7 and the seal pipe 8. Thereby, the infrared rays radiated from the ready-mixed concrete are guided to the sensor 25 without interfering with the blades 6 and 7 when the ready-mixed concrete in the mixer drum 2 is stirred by the blades 6 and 7. For this reason, the temperature of ready-mixed concrete can be accurately measured by the sensor 25.

  The sensor 25 at the measurement position is arranged from the vicinity of the rotation axis O of the mixer drum 2 toward the front end portion 2B of the mixer drum 2 (the center portion of the mixer drum 2). For this reason, even when the amount of ready-mixed concrete mounted on the mixer drum 2 is small, infrared rays radiated from ready-mixed concrete stirred in the back of the mixer drum 2 are guided to the sensor 25 without interfering with the blades 6 and 7. . Thereby, even if the loading amount of ready-mixed concrete decreases, the temperature of ready-made concrete can be accurately measured by the sensor 25.

  The measurement position of the sensor 25 is not limited to the position inside the hopper 16, but the position located inside the seal pipe 8 in the drum opening 2 </ b> A or the seal pipe 8 (drum opening 2 </ b> A) inside the mixer drum 2. It may be a position on the far side. Since the sensor 25 is brought close to the ready-mixed concrete in the mixer drum 2, the accuracy of measuring the temperature of the ready-mixed concrete can be increased.

  When ready-mixed concrete is put into the hopper 16 at the kneading place, the hopper cover 35 is opened. At this time, as the hopper cover 35 is rotated from the closed position to the open position, the sensor 25 is rotated together with the hopper cover 35 via the arm 41 so that the sensor 25 comes out of the hopper 16 and is mixed with the mixer drum. 2 moves to a retreat position provided above 2. Thereby, it is prevented that the ready-mixed concrete thrown into the hopper 16 is applied to the sensor 25, and it can be avoided that the sensor 25 malfunctions.

  The hopper cover 35 is not limited to a configuration that rotates around the axis to open the hopper opening 16A, but may be configured to open the hopper opening 16A by being removed from the hopper opening 16A.

  According to the above 1st Embodiment, there exists an effect shown below.

  The mixer vehicle 100 measures the temperature of the ready-mixed concrete in the mixer drum 2 in a non-contact manner, and measures the sensor 25 from the retreat position provided outside the hopper 16 to the inside of the hopper 16 and facing the inside of the mixer drum 2. And a support mechanism 40 that is movably supported to a position. When ready-mixed concrete is put into the mixer drum 2, the sensor 25 is moved by the support mechanism 40 to a retracted position outside the hopper 16. Thereby, the ready-mixed concrete thrown into the mixer drum 2 can be prevented from being applied to the sensor 25. On the other hand, when measuring the temperature of the ready-mixed concrete mounted on the mixer drum 2, the sensor 25 is moved by the support mechanism 40 from the retracted position to the measurement position facing the inside of the mixer drum 2 through the inside of the hopper 16. Thereby, the infrared rays radiated from the ready-mixed concrete stirred in the mixer drum 2 are guided to the sensor 25 without interfering with the blades 6 and 7, and the temperature of the ready-mixed concrete can be measured with high accuracy.

  The sensor 25 at the measurement position is arranged from the vicinity of the rotation axis O of the mixer drum 2 toward the tip portion 2B so as to face the inside of the blades 6 and 7. As a result, during transportation in which the fresh concrete in the mixer drum 2 is agitated by the blades 6 and 7, infrared rays (light rays) radiated from the ready concrete are guided to the sensor 25 through the space provided in the center of the mixer drum 2. 25 can accurately measure the temperature of the ready-mixed concrete.

  The support mechanism 40 includes a hopper cover 35 that opens and closes the hopper 16 so that the hopper cover 35 can pivot on the vehicle body 1, and an arm 41 that supports the sensor 25 on the hopper cover 35. Since the sensor 25 is supported by the hopper cover 35 by the arm 41, the measurement position where the hopper cover 35 faces the mixer drum 2 in conjunction with the operation of opening and closing the hopper opening 16 </ b> A and a retreat provided outside the hopper 16. Move to the position. Since the sensor 25 is moved by the operation of opening and closing the hopper cover 35, the trouble of operating the movement of the sensor 25 can be saved.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. Below, it demonstrates centering on a different point from the said 1st Embodiment, the same code | symbol is attached | subjected to the structure same as the said 1st Embodiment, and description is abbreviate | omitted.

  The support mechanism 40 according to the first embodiment is configured to fix the sensor 25 to the hopper cover 35 by the arm 41. In contrast, the support mechanism 50 according to the second embodiment is configured to support the sensor 25 on the hopper cover 35 by the arm 51 so as to be rotatable within a predetermined range.

  The support mechanism 50 includes a hopper cover 35 that opens and closes the hopper 16 and a rod-shaped arm 51 that supports the sensor 25 on the hopper cover 35. The base end of the arm 51 is rotatably supported by the hopper cover 35 via a pin 52, and the sensor 25 is attached to the tip of the arm 51. The pin 52 is provided at the center of the hopper cover 35 and is arranged to extend in the left-right direction of the vehicle. The arm 51 is supported so as to rotate about the pin 52 in the longitudinal direction of the vehicle.

  A first stopper 53 and a second stopper 54 are attached to the hopper cover 35 before and after the pin 52. The arm 51 is in contact with the first stopper 53 or the second stopper 54, thereby restricting an angular range in which the arm 51 rotates around the pin 52.

  The hopper cover 35 opens and closes the hopper opening 16A by rotating in the front-rear direction of the vehicle as indicated by an arrow E in the figure via the shaft 17. When the hopper cover 35 is in a closed position covering the hopper opening 16A as shown by a solid line in FIG. 3, the arm 51 contacts the first stopper 53, and the sensor 25 is supported at the measurement position facing the mixer drum 2.

  As the hopper cover 35 rotates from the closed position to the open position, the sensor 25 rotates together with the hopper cover 35 via the arm 51. While the hopper cover 35 is rotating as indicated by a two-dot chain line in FIG. 3, the arm 51 is in contact with the first stopper 53. When the hopper cover 35 is further rotated and approaches the open position, the arm 51 is rotated about the pin 52 by gravity, so that the arm 51 is separated from the first stopper 53 and contacts the second stopper 54. As a result, in a state where the hopper cover 35 is in the open position provided above the rear side of the mixer drum 2 as shown by a two-dot chain line in FIG. 3, the arm 51 and the sensor 25 are rotated in a direction approaching the hopper cover 35. Move to the parking position. Thus, the sensor 25 is stored in the retracted position so as not to protrude greatly above the mixer drum 2.

  According to the above 2nd Embodiment, there exists an effect shown below.

  The arm 51 of the support mechanism 50 is connected to the hopper cover 35 so as to be rotatable within a predetermined range. Therefore, as the hopper cover 35 rotates in the direction to open the hopper opening 16A, the sensor 25 rotates with respect to the hopper cover 35 via the arm 45, so that the retracted position approaches the hopper cover 35. Move to. As a result, the sensor 25 in the retracted position has a height that protrudes above the mixer drum 2 and can be prevented from being damaged by hitting a charging machine provided at the kneading place.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. Below, it demonstrates centering on a different point from the said 1st Embodiment, the same code | symbol is attached | subjected to the structure same as the said 1st Embodiment, and description is abbreviate | omitted.

  The mixer truck according to the third embodiment does not include a hopper cover, and the hopper opening 16A of the hopper 16 is always open.

  The mixer vehicle is provided with a support mechanism 60 that supports the sensor 25 on the vehicle body 1 without using a hopper cover. The support mechanism 60 includes a rod-shaped arm 61 that supports the sensor 25, and an actuator 62 that rotates the arm 61.

  The actuator 62 is provided at a position located above the front side of the hopper 16 in the vehicle body 1. The base end of the arm 61 is coupled to the shaft 63 of the actuator 62, and the sensor 25 is attached to the tip of the arm 61. The shaft 63 of the actuator 62 constitutes an axis that rotatably supports the arm 61 on the vehicle body 1.

  The configuration is not limited to the above-described configuration, and the actuator 62 may be attached to the hopper 16 and the arm 61 may be supported by the vehicle body 1 via the hopper 16.

  The actuator 62 includes an electric motor (not shown) and a speed reducer (not shown) that decelerates the rotation of the electric motor and transmits it to the shaft 63 (see FIG. 2).

  The actuator 62 is operated by a switch operation by the driver, and rotates the arm 61 and the sensor 25 through the shaft 63 as indicated by an arrow F in the drawing. The support mechanism 60 switches the sensor 25 between a retracted position provided outside the hopper 16 and a measurement position directed toward the ready-mixed concrete in the mixer drum 2 by the operation of the actuator 62.

  The support mechanism 60 may be configured to manually rotate the arm 61 without including an actuator that rotates the arm 61.

  According to the above 3rd Embodiment, there exists an effect shown below.

  The support mechanism 60 includes an arm 61 that supports the sensor 25 and is rotatably supported by the vehicle body 1. For this reason, even in a vehicle that does not include a hopper cover, the sensor 25 can move to the retracted position via the arm 61. Thereby, it is prevented that the ready-mixed concrete thrown into the hopper 16 is applied to the sensor 25, and it can be avoided that the sensor 25 malfunctions.

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

1 Car body 2 Mixer drum
2A drum opening 2B tip 16 hopper 16A hopper opening 25 sensor (temperature detector)
35 Hopper cover 40, 50, 60 Support mechanism 41, 51, 61 Arm 100 Mixer car

Claims (5)

In a mixer truck equipped with a mixer drum that can be loaded with ready-mixed concrete,
A drum opening opening in the mixer drum;
A hopper for guiding the ready-mixed concrete put into the drum opening;
A temperature detector that measures the temperature of the ready-mixed concrete in the mixer drum in a non-contact manner;
A mixer vehicle comprising: a support mechanism that movably supports the temperature detector from a retracted position outside the hopper to a measurement position facing the inside of the mixer drum through the inside of the hopper.   The mixer vehicle according to claim 1, wherein the temperature detector at the measurement position is disposed toward a front end portion of the mixer drum. The support mechanism is
A hopper cover that opens and closes the hopper is rotatably supported by the vehicle body,
The mixer vehicle according to claim 1, wherein the hopper cover includes an arm that supports the temperature detector.   4. The mixer truck according to claim 3, wherein the arm is connected to the hopper cover so as to be rotatable within a predetermined range.   The mixer vehicle according to claim 1, wherein the support mechanism includes an arm that supports the temperature detector and is rotatably supported by a vehicle body.

Images