JP2017087443A - Ready mixed concrete temperature measurement device and truck mixer including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ready mixed concrete temperature measurement device which prevents adherence of ready mixed concrete and measures a temperature of the ready mixed concrete in a mixer drum during transportation.SOLUTION: A ready mixed concrete temperature measurement device 100 measures a temperature of ready mixed concrete in a mixer drum 2 rotationally mounted on a truck mixer 10 and includes a temperature sensor 30 which is at least partially buried in a wall part of the mixer drum 2 and contacts with the ready mixed concrete to measure the temperature of the ready mixed concrete.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a temperature measuring device for measuring the temperature of ready-mixed concrete in a mixer drum, and a mixer truck equipped with the same.

  The mixer truck includes a mixer drum that can load ready-mixed concrete, which is so-called ready-mixed concrete, as contents, and transports ready-mixed concrete to a placement site.

  If the temperature of the ready-mixed concrete increases when the ready-mixed concrete is transported by the mixer truck, there is an adverse effect on the ready-mixed concrete, such as an increase in slump loss. 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 mixer vehicle having a sensor unit fixed to the inner wall of a drum. In the mixer truck disclosed in Patent Document 1, a temperature sensor such as a thermocouple thermometer is used as the sensor unit, and the temperature of the ready-mixed concrete is measured when the sensor unit protruding from the inner wall of the drum comes into contact with the ready-mixed concrete.

JP 2008-49499 A

  In the mixer truck disclosed in Patent Document 1, since the sensor part protrudes from the inner wall of the mixer drum, ready-mixed concrete tends to adhere to the sensor part. If a large amount of ready-mixed concrete adheres to the sensor unit, the accuracy of temperature measurement of the ready-mixed concrete decreases, so the attached ready-mixed concrete needs to be removed.

  As described above, when the sensor portion protruding from the inner wall of the mixer drum is provided, it is necessary to remove the ready concrete adhering to the sensor portion in addition to the operation of removing the ready concrete adhering to the inner wall surface of the mixer drum. Therefore, in the mixer truck disclosed in Patent Document 1, the removal work of ready-mixed concrete inside the mixer drum increases.

  The present invention has been made in view of the above-mentioned problems, and provides a ready-mixed concrete temperature measuring device capable of measuring the temperature of ready-mixed concrete in a mixer drum during transportation while preventing the ready-mixed concrete from adhering. For the purpose.

  A first aspect of the present invention is a ready-mixed concrete temperature measuring device for measuring the temperature of ready-mixed concrete in a mixer drum, wherein the temperature is measured by measuring at least a part of the ready-mixed concrete in contact with the ready-mixed concrete. A measuring unit is provided.

  In the first invention, since the temperature measuring part is at least partially embedded in the wall part in the mixer drum, the amount of protrusion into the mixer drum is reduced. Therefore, the quantity of ready-mixed concrete adhering to the temperature measurement part periphery is reduced.

  The second invention is characterized in that the wall portion of the mixer drum has a blade formed in a spiral shape along the rotation axis inside the mixer drum, and the temperature measuring portion is provided in the blade.

  In the second aspect of the invention, since the temperature measurement unit is provided on the blade provided inside the mixer drum, it is not easily affected by outside air or sunlight.

  According to the second invention, the temperature of ready-mixed concrete can be accurately measured without being affected by outside air or the like.

  The third invention is characterized by further comprising a slip ring that is provided on the rotating shaft of the mixer drum and supplies electric power to the temperature measuring unit.

  In 3rd invention, electric power is supplied to a temperature measurement part by the slip ring which can supply electric power to a rotary body.

  The fourth invention further includes a transmitter provided in the mixer drum for transmitting the measurement result of the temperature measurement unit by a radio signal, and a receiver provided outside the mixer drum for receiving a radio signal transmitted from the transmitter. It is characterized by that.

  In the fourth invention, the measurement result of the temperature measurement unit is transmitted as a radio signal between the transmitter and the receiver.

  According to the fourth invention, since it is not necessary to route the wiring in order to transmit the measurement result of the temperature measuring unit, the ready-mixed concrete temperature measuring device can be easily attached to the mixer truck.

  A fifth aspect of the invention is a mixer truck, comprising the ready-mixed concrete temperature measuring device according to any one of the first to fourth aspects.

  According to the present invention, the temperature of the ready-mixed concrete in the mixer drum during transportation can be measured without promoting the adhesion of ready-mixed concrete.

It is a side view of the mixer truck carrying the ready-mixed concrete temperature measuring apparatus which concerns on 1st Embodiment of this invention. It is the schematic which shows the ready-mixed concrete temperature measuring apparatus which concerns on 1st Embodiment of this invention. It is A arrow directional view in FIG. It is sectional drawing along the BB line in FIG. It is the schematic which shows the modification of the ready-mixed concrete temperature measuring apparatus which concerns on 1st Embodiment of this invention. It is the schematic which shows the ready-mixed concrete temperature measuring apparatus which concerns on 2nd Embodiment of this invention.

(First embodiment)
Hereinafter, a ready-mixed concrete temperature measuring apparatus 100 according to a first embodiment of the present invention will be described with reference to the drawings.

  First, with reference to FIG.1 and FIG.2, the whole structure of the mixer truck 10 provided with the ready-mixed concrete temperature measuring apparatus 100 is demonstrated. FIG. 2 shows a state in which ready-mixed concrete is not put into the mixer drum.

  The mixer truck 10 transports ready-mixed concrete (hereinafter referred to as “green concrete”), which is so-called ready-mixed concrete, by a mixer drum 2 mounted on the gantry 1.

  As shown in FIG. 1, the mixer drum 2 is a container that is rotatably mounted on the gantry 1. The mixer drum 2 is mounted so that the rotating shaft 2A faces the front-rear direction of the mixer vehicle 10. Further, the mixer drum 2 is mounted so as to be inclined forward and backward so as to gradually increase toward the rear part of the gantry 1.

  The mixer drum 2 is provided with a pair of blades 3 and 4 that protrude from the inner wall 2B and extend spirally along the rotation shaft 2A.

  An opening 2C is formed at the rear end of the mixer drum 2, and raw food is charged and discharged from the opening 2C. Above the opening 2 </ b> C of the mixer drum 2, a hopper 5 is provided for charging the raw food.

  As shown in FIG. 2, an inner gusset 20 constituting a part of the wall portion of the mixer drum 2 is provided at the bottom of the mixer drum 2.

  The inner gusset 20 is an iron plate member and is provided so as to protrude inward from the inner wall 2 </ b> B at the bottom of the mixer drum 2. The inner gusset 20 is in contact with the raw concrete and defines an internal space 21 that is blocked from outside air with the bottom wall portion 2D that is the bottom wall portion of the mixer drum 2. The raw cooker contacts the inner gusset 20 and does not flow into the internal space 21.

  An outer gusset 22 that is an iron plate member is provided outside the bottom wall 2D of the mixer drum 2. The outer gusset 22 defines a bottom space 23 between the outer gusset 22 and the bottom wall 2D of the mixer drum 2. By providing the inner gusset 20 and the outer gusset 22 on the mixer drum 2, the strength of the bottom of the mixer drum 2 is improved. The mixer drum 2 does not have to be provided with the outer gusset 22. Even in this case, the strength of the bottom of the mixer drum 2 can be improved by increasing the rigidity of the inner gusset 20, for example, by increasing the amount of protrusion of the inner gusset 20 from the bottom of the mixer drum 2.

  The mixer drum 2 is driven by a traveling engine (not shown) mounted on the mixer vehicle 10 as a power source, and is rotated in the forward and reverse directions and increased / decreased by a drum driving device 6 (see FIG. 1) connected to the rotating shaft 2A of the mixer drum 2. To do. The drum driving device 6 controls the rotation of the mixer drum 2 according to a command from the controller 35 (see FIG. 2) and a control lever (not shown). When the mixer drum 2 is rotated forward by the drum driving device 6, the raw concrete in the mixer drum 2 is stirred by the blades 3 and 4. Further, when the mixer drum 2 is operated in reverse, the raw control in the mixer drum 2 is sent to the opening 2C side by the blades 3 and 4 and discharged to the outside. The power source for driving the mixer drum 2 is not limited to the traveling engine, and for example, a power source such as an engine for driving the mixer drum 2 may be provided separately.

  Next, the ready-mixed concrete temperature measuring apparatus 100 for measuring the temperature of the ready-mixed concrete in the mixer drum 2 will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the ready-mixed concrete temperature measuring apparatus 100 includes a temperature sensor 30 as a temperature measuring unit provided on a blade 3 as a wall portion of the mixer drum 2 with which the ready-mixed concrete comes into contact, and a rotating shaft 2A of the mixer drum 2. And a slip ring 31 that supplies electric power to the temperature sensor 30.

  The temperature sensor 30 is a sheet-like thermocouple. As shown in FIGS. 3 and 4, the temperature sensor 30 is provided embedded in a notch 3 </ b> A formed in the blade 3. As shown in FIG. 4, the temperature sensor 30 is fixed to the blade 3 by the resin material 40 filled in the notch 3 </ b> A so as to come into contact with the raw concrete put into the mixer drum 2. Specifically, the temperature sensor 30 is provided so as to be continuous with the resin material 40 and the surface of the blade 3 so as not to protrude from the surface of the blade 3 toward the accommodation space 7 inside the mixer drum 2. That is, the temperature sensor 30 is not covered with the resin material 40 but faces the accommodation space 7 of the mixer drum 2 and comes into contact with the raw control unit. As described above, since the temperature sensor 30 does not protrude from the blade 3 toward the accommodation space 7 of the mixer drum 2, it is possible to prevent the raw concrete from adhering to the temperature sensor 30.

  The temperature sensor 30 is provided on the blade 3 on the bottom side of the mixer drum 2 on the front side of the vehicle (see FIG. 1). The blade 3 on the bottom side of the mixer drum 2 is in contact with the raw control even when the amount of raw control in the mixer drum 2 is small. For this reason, by providing the temperature sensor 30 on the blade 3 on the bottom side, the temperature of the raw control can be measured even when the amount of the raw control in the mixer drum 2 is small. That is, the temperature sensor 30 is the lowest position in the mixer drum 2 and is provided on the blade 3 in the region R in which raw food is accumulated.

  Further, the temperature of the inner wall 2B of the mixer drum 2 may change due to the influence of outside air or sunlight. On the other hand, since the blade 3 is provided from the inner wall 2B of the mixer drum 2 toward the accommodation space 7, it is not easily affected by outside air or sunlight. Therefore, by providing the temperature sensor 30 on the blade 3, the temperature of the raw control can be accurately measured without being affected by outside air or the like.

  The slip ring 31 supplies power to the rotating body and transmits signals to and from the rotating body. As shown in FIG. 2, the slip ring 31 is connected to a hollow tube 32 provided on the rotating shaft 2 </ b> A of the mixer drum 2. The slip ring 31 is electrically connected to the temperature sensor 30 by a wiring 33 passing through the hollow tube 32.

  The slip ring 31 is electrically connected to a battery 34 and a controller 35 mounted on the mixer truck 10. The controller 35 stores and calculates the measurement result of the temperature sensor 30. The slip ring 31 supplies power from the battery 34 to the temperature sensor 30 provided on the blade 3. Further, the slip ring 31 receives the temperature measurement result from the temperature sensor 30 and transmits it to the controller 35.

  Next, the temperature measuring method of the ready-mixed concrete temperature measuring apparatus 100 will be described.

  When the ready-mixed containers are shipped, the engine is started in advance to rotate the mixer drum 2, and a predetermined amount of ready-mixed ingredients is put into the rotating mixer drum 2 through the hopper 5. When the mixer drum 2 rotates, the raw food is stirred in the mixer drum 2 by the blades 3 and 4. In the mixer truck 10, the mixer drum 2 rotates even during traveling to agitate the raw concrete.

  As the mixer drum 2 rotates, the blades 3 and 4 agitate the raw control unit, and the temperature sensor 30 provided on the blade 3 contacts the raw control unit. The temperature sensor 30 measures the temperature of the raw control unit in contact at a predetermined measurement cycle. The temperature sensor 30 is embedded in the blade 3 so as not to protrude from the blade 3 toward the accommodation space 7 of the mixer drum 2. Therefore, the raw control is prevented from adhering to the temperature sensor 30.

  In order to prevent the raw material from adhering to the temperature sensor 30, it is desirable that the temperature sensor 30 does not protrude toward the accommodation space 7 of the mixer drum 2, but at least a part of the temperature sensor 30 is embedded in the blade 3. It may be a thing. Since at least a part of the temperature sensor 30 is embedded in the blade 3, the amount of protrusion to the accommodation space 7 is reduced, and the amount of raw concrete attached can be reduced. As described above, the temperature sensor 30 may be any sensor that is provided so as to be at least partially embedded in the wall portion that comes into contact with the live control unit and measures the temperature by directly contacting the live control unit.

  Since the ready-mixed concrete temperature measuring apparatus 100 includes the slip ring 31 that can supply power to the rotating body, the power is supplied to the temperature sensor 30 even when the mixer truck 10 is running and the mixer drum 2 is rotating. Can measure the temperature of raw concrete.

  The measurement result measured by the temperature sensor 30 is transmitted to the controller 35 through the slip ring 31 and stored. The measurement result transmitted to the controller 35 is transmitted to, for example, a display provided in the driver's seat, and the temperature of the raw control as the measurement result is displayed on the display. Therefore, according to the ready-mixed concrete temperature measuring apparatus 100, the temperature of the ready-mixed concrete in the traveling mixer truck 10 can be grasped.

  Note that the mixer vehicle 10 does not necessarily have to include a display. For example, even if the temperature measurement result of the temperature sensor 30 is stored in the controller 35 and wirelessly transmitted from the controller 35 to a management center or the like that confirms the transport status of the mixer truck 10, the temperature information of the live control is confirmed in the management center. Good. Further, the temperature measurement result may be stored only in the controller 35 while the mixer vehicle 10 is traveling, and may be transmitted to the management center by the operator when the vehicle is stopped. In other words, the ready-mixed concrete temperature measuring device 100 may not always be able to check the temperature of the ready-mixed container during traveling, and can be confirmed by the operator by acquiring the temperature of the ready-mixed container measured by the temperature sensor 30 during the transportation. I just need it.

  As described above, the temperature sensor 30 is embedded in the blade 3 and comes into direct contact with the raw control as the mixer drum 2 rotates, and measures the temperature of the raw control.

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

  According to the ready-mixed concrete temperature measuring apparatus 100, the temperature sensor 30 is embedded in the blade 3 in the mixer drum 2 and does not protrude into the mixer drum 2. Therefore, the amount of raw concrete attached to the periphery of the temperature sensor 30 is reduced. Therefore, it is possible to measure the temperature of the raw concrete in the mixer drum 2 during transportation while preventing the raw concrete from adhering.

  The temperature sensor 30 is provided on the blade 3 provided from the inner wall of the mixer drum 2. For this reason, the blade 3 is less susceptible to outside air and sunlight than the inner wall 2B. Therefore, by providing the temperature sensor 30 on the blade 3, the accuracy of temperature measurement can be improved without being affected by outside air or the like.

  The temperature sensor 30 is provided on the blade 3 in the region R where the height in the mixer drum 2 is the lowest. For this reason, even when there is little raw material amount in the mixer drum 2, the temperature of raw material can be measured.

  Next, with reference to FIG. 5, the modification of the ready-mixed concrete temperature measuring apparatus 100 is demonstrated.

  In the first embodiment, in the ready-mixed concrete temperature measuring apparatus 100, power is supplied to the temperature sensor 30 through the slip ring 31, and the measurement result of the temperature sensor 30 is transmitted to the controller 35 through the slip ring 31.

  Instead, as shown in FIG. 5, the ready-mixed concrete temperature measuring apparatus 100 receives a transmitter 50 that transmits a detection result of the temperature sensor 30 by a radio signal, and a radio signal transmitted from the transmitter 50. A receiver 51 that transmits to the controller 35 and a measurement battery 52 that supplies power to the temperature sensor 30 and the transmitter 50 may be provided, and the temperature of the raw control may be measured without using the slip ring 31. .

  The transmitter 50 is provided in the bottom space 23 between the outer gusset 22 inside the mixer drum 2 and the bottom wall 2D of the mixer drum 2. The transmitter 50 is electrically connected to the temperature sensor 30 by the wiring 53 and receives a measurement result from the temperature sensor 30. The transmitter 50 transmits the received measurement result as a radio signal.

  The receiver 51 is provided outside the mixer drum 2, receives the measurement result of the temperature sensor 30 transmitted as a radio signal from the transmitter 50, and transmits it to the controller 35.

  In such a modification, the measurement result of the temperature sensor 30 is transmitted as a radio signal from the transmitter 50 and input to the controller 35 via the receiver 51. Therefore, since it is not necessary to route the wiring 33 through the hollow tube 32, it can be easily attached to the mixer truck 10.

  Moreover, since it is not necessary to route the wiring 33 through the hollow tube 32, the wiring 33 is not damaged by the contact between the hollow tube 32 and the wiring 33, and the temperature measurement of the raw control by the temperature sensor 30 is not disabled. Therefore, a measure for preventing the wiring 33 from being damaged becomes unnecessary, the cost can be reduced, and the attachment property to the mixer truck 10 is further improved.

  In the first embodiment, the temperature sensor 30 is provided on the blade 3, but may be provided on the blade 4.

  A plurality of temperature sensors 30 may be provided on the wall portion of the mixer drum 2. For example, a plurality of temperature sensors 30 may be provided on the blade 3, or the temperature sensors 30 may be provided on both the blade 3 and the blade 4. By providing a plurality of temperature sensors 30 on the mixer drum 2, for example, a value obtained by averaging the measurement results of the respective temperature sensors 30 can be calculated to improve the accuracy of temperature measurement.

(Second Embodiment)
Next, with reference to FIG. 6, the ready-mixed concrete temperature measuring apparatus 200 which concerns on 2nd Embodiment of this invention is demonstrated. Below, it demonstrates centering on a different point from the said 1st Embodiment, attaches | subjects the same code | symbol to the structure same as the ready-mixed concrete temperature measuring apparatus 100 of the said 1st Embodiment, and abbreviate | omits description.

  In the first embodiment, the temperature sensor 30 is embedded in the blade 3. Instead, the temperature sensor 130 is embedded in the inner gusset 20 provided so as to protrude from the inner wall 2 </ b> B at the bottom of the mixer drum 2, and is provided facing the accommodation space 7 of the mixer drum 2.

  As shown in FIG. 6, the temperature sensor 130 is provided to be embedded in the radially outer side of the inner gusset 20 away from the center of the mixer drum 2. Like the blades 3 and 4, the inner gusset 20 is provided from the inner wall 2 </ b> B of the mixer drum 2 toward the accommodation space 7, and is not directly touched by the outside air, and thus is not easily affected by the outside air.

  In the ready-mixed concrete temperature measuring apparatus 200, power is supplied to the temperature sensor 130 through the slip ring 31, and the measurement result of the temperature sensor 130 is transmitted to the controller 35 through the slip ring 31. As in the first embodiment, the ready-mixed concrete temperature measuring apparatus 200 includes a transmitter 50, a receiver 51, and a measurement battery 52, and may measure the temperature of the ready-mixed concrete without using the slip ring 31. .

  A plurality of temperature sensors 130 may be provided in the inner gusset 20. Further, temperature sensors 130 may be provided on both the blades 3 and 4 and the inner gusset 20.

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

  According to the ready-mixed concrete temperature measuring apparatus 200, the temperature sensor 130 is embedded in the inner gusset 20 provided from the inner wall 2 </ b> B of the mixer drum 2, and does not protrude into the mixer drum 2. Therefore, the amount of raw concrete attached to the periphery of the temperature sensor 130 is reduced, and the temperature of the raw concrete in the mixer drum 2 during transportation can be measured while preventing the raw concrete from attaching.

  Further, since the inner gusset 20 does not directly touch the outside air, the inner gusset 20 is less susceptible to the influence of outside air or sunlight than the inner wall 2B of the mixer drum 2. Therefore, by providing the temperature sensor 130 in the inner gusset 20, it is possible to improve the accuracy of temperature measurement without being affected by outside air or the like.

  Further, the temperature sensor 130 is provided on the radially outer side of the inner gusset 20. Thereby, even if it is a case where the quantity of the raw concrete put into the mixer drum 2 is small, it can contact with the raw concrete and can measure the temperature of the raw concrete.

  Hereinafter, the configuration, operation, and effect of the embodiment of the present invention will be described together.

  The ready-mixed concrete temperature measuring devices 100 and 200 are ready-made concrete temperature measuring devices that measure the temperature of the ready-mixed concrete in the mixer drum 2 that is rotatably mounted on the mixer truck 10. 20) is provided with temperature sensors 30 and 130 that are at least partially embedded and come into contact with the raw food to measure the temperature of the raw food.

  In this configuration, since the temperature sensors 30 and 130 are at least partially embedded in the wall portion (blade 3 and inner gusset 20) in the mixer drum 2, the amount of protrusion into the mixer drum 2 is reduced. Therefore, the amount of raw concrete attached around the temperature sensors 30 and 130 is reduced.

  According to this configuration, it is possible to measure the temperature of the raw concrete in the mixer drum 2 during transportation while preventing the raw concrete from adhering.

  In the ready-mixed concrete temperature measuring apparatus 100, the wall portion of the mixer drum 2 has a blade 3 formed in a spiral shape along the rotation axis 2 </ b> A inside the mixer drum 2, and a temperature sensor 30 is provided on the blade 3.

  In this configuration, since the temperature sensor 30 is provided on the blade 3 provided inside the mixer drum 2, the temperature sensor 30 is hardly affected by outside air or sunlight.

  According to this configuration, the temperature of the raw control can be accurately measured without being affected by outside air or the like.

  The ready-mixed concrete temperature measuring apparatuses 100 and 200 further include a slip ring 31 that is provided on the rotating shaft 2A of the mixer drum 2 and supplies power to the temperature sensors 30 and 130.

  In this configuration, electric power is supplied to the temperature sensor 30 by the slip ring 31 that can supply electric power to the rotating body.

  The ready-mixed concrete temperature measuring devices 100 and 200 are provided in the mixer drum 2 and transmit the measurement results of the temperature sensors 30 and 130 by radio signals, and are provided outside the mixer drum 2 and transmitted from the transmitter 50. And a receiver 51 that receives a radio signal.

  In this configuration, the measurement results of the temperature sensors 30 and 130 are transmitted as radio signals between the transmitter 50 and the receiver 51.

  According to this configuration, since it is not necessary to route the wiring 33 in order to transmit the measurement results of the temperature sensors 30 and 130, the ready-mixed concrete temperature measuring devices 100 and 200 can be easily attached to the mixer truck 10.

  The mixer truck 10 includes the ready-mixed concrete temperature measuring device having any one of the above-described configurations.

  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.

  In each of the above-described embodiments, the temperature sensors 30 and 130 are provided so as to protrude inward from the inner wall 2B of the mixer drum 2 and are at least the walls opposite to the temperature measurement side of the temperature sensors 30 and 130 as inner walls that are not easily affected by outside air. The part is provided in the blades 3 and 4 and the inner gusset 20 that do not directly touch the outside air. In order to accurately measure the temperature of the raw control, it is desirable that the temperature sensors 30 and 130 are provided on the blades 3 and 4 and the inner gusset 20 as inner walls. However, any wall other than the blades 3 and 4 and the inner gusset 20 can be used as long as it is embedded in the wall portion of the mixer drum 2 so as not to protrude toward the accommodation space 7 of the mixer drum 2 and can measure the temperature of the raw concrete by contacting with the raw concrete. It may be provided in the part. That is, the temperature sensor 30 may be provided on the inner wall 2B of the mixer drum 2 that is affected by outside air or sunlight. In this case, it is desirable to provide a cover that covers the periphery of the temperature sensor 30 from the outside of the mixer drum 2 to suppress the influence of outside air or the like.

  In each of the above embodiments, the temperature sensors 30 and 130 are sheet-like thermocouples. Instead, other temperature sensors such as a thermistor may be used.

100, 200 ... Ready-mix concrete temperature measuring device, 10 ... Mixer car, 2 ... Mixer drum,
2A ... Rotating shaft 3, 4 ... Blade (wall part) 30, 130 ... Temperature sensor (temperature measuring part), 31 ... Slip ring, 50 ... Transmitter, 51 ... Receiver

Claims (5)

A ready-mixed concrete temperature measuring device for measuring the temperature of ready-mixed concrete in a mixer drum rotatably mounted on a mixer car,
A ready-mixed concrete temperature measuring device comprising: a temperature measuring unit that is at least partially embedded in a wall portion of the mixer drum and that measures the temperature of ready-mixed concrete in contact with the ready-mixed concrete. The wall portion of the mixer drum has a blade formed in a spiral shape along the rotation axis inside the mixer drum,
The said concrete temperature measuring part is provided in the said braid | blade, The ready-mixed concrete temperature measuring apparatus of Claim 1 characterized by the above-mentioned.   The ready-mixed concrete temperature measuring apparatus according to claim 1, further comprising a slip ring that is provided on a rotation shaft of the mixer drum and supplies electric power to the temperature measuring unit. A transmitter provided in the mixer drum for transmitting a measurement result of the temperature measurement unit by a radio signal;
The ready-mixed concrete temperature measuring apparatus according to claim 1, further comprising a receiver that is provided outside the mixer drum and that receives the wireless signal transmitted from the transmitter.   A mixer truck comprising the ready-mixed concrete temperature measuring device according to any one of claims 1 to 4.

Images