JPH067050U - Slump value measuring device for ready-mixed concrete - Google Patents

Abstract

(57) [Summary] [Purpose] Easily check the slump value of ready-mixed concrete even while the mixer truck is running. [Structure] A fluid driving means 50 for rotationally driving a stirring device of fresh concrete, a means 51 for detecting a hydraulic pressure of the fluid driving means 50, and a means 5 for inputting a loading amount of fresh concrete.
2, a means 55 that sets the relationship between the slump value and the hydraulic pressure for each load amount, a means 53 that calculates the slump value from the detected value of the hydraulic pressure and the input value of the load amount, and the calculation result of the calculation means 53. Means 54 for displaying.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slump value measuring device for a ready-mixed concrete transportation vehicle or the like.

[0002]

[Prior art]

 For mixer trucks or agitators that transport ready-mixed concrete, it is necessary to maintain the viscosity of the ready-mixed concrete at the optimum state when it arrives at the work site. In this regard, the applicant of the present invention, as disclosed in Japanese Utility Model Laid-Open No. 63-79555, discloses a basic method of expressing the viscosity of the raw concrete from the hydraulic pressure of the hydraulic drive means for driving the mixer or agitator for stirring the raw concrete. We have proposed a device that calculates and displays the slump value.

[0003]

[Problems to be solved by the device]

 However, in the above conventional device, in order to obtain the actual slump value from the basic slump value, the driver or the operator uses the scale on the display device from the basic slump value displayed as the actual ready-mixed concrete loading amount. It is necessary to convert, and there is a possibility that misconception may occur during this conversion while the mixer truck is operating.

Therefore, an object of the present invention is to provide a slump value measuring device capable of easily confirming the slump value.

[0005]

[Means for Solving the Problems]

 The present invention, as shown in FIG. 1, inputs fluid driving means 50 for rotationally driving a stirring device for fresh concrete, means 51 for detecting hydraulic pressure of fluid driving means 50, and loading amount of the fresh concrete. Means 52, means 55 for setting the relationship between the slump value and hydraulic pressure for each loading amount, means 53 for computing the slump value from the detected value of the hydraulic pressure and the input value of the loading amount, and the computing means Means 54 for displaying the calculation result.

[0006]

The torque for rotationally driving the stirrer is proportional to the viscosity of the green concrete. The higher this viscosity is, the higher the driving torque is, and the hydraulic pressure of the fluid driving means is increased as the driving torque is increased. If the viscosities are the same, the drive torque will increase as the load increases. The calculation means calculates the slump value based on the relationship between the slump value setting means based on the detected hydraulic pressure and the input load amount, and displays it on the display means.

[0007]

【Example】

 This embodiment shows an example in which the present invention is applied to a mixer vehicle in which a mixer is driven by a hydraulic motor.

As shown in FIGS. 2 and 3, reference numeral 1 is a hydraulic pump driven by the engine 3, and 2 is a hydraulic motor as a fluid drive means driven by the pressure oil of the hydraulic pump 1.

Reference numeral 4 is a mixer driven by the hydraulic motor 2, and constitutes a mixer for fresh concrete.

A hydraulic sensor 5 is provided in a hydraulic circuit that connects the discharge side of the hydraulic pump 1 and the high pressure side of the hydraulic motor 2, and the hydraulic sensor 5 is connected to a controller 6 that calculates and displays a slump value. To be done.

An input display panel 10 is provided in the driver's seat (not shown), and the input display panel 10 displays the slump value based on the calculation result of the controller 6 and sends input information to the controller 6. A numeric keypad 8 as an input means and a load amount display section 9 for displaying an input value of the numeric keypad 8 are provided.

An example of the control of the controller 6 will be described in detail with reference to the flowchart of FIG.

When the mixer vehicle is started, the controller 6 is also started and the processing from step 61 is sequentially performed. In step 61, the loading amount described in the slip when loading the ready-mixed concrete into the mixer truck at the plant or the like is input from the ten-key pad 8.

Based on the load amount input by the ten-key pad 8, the controller 6 selects a function corresponding to the load amount from the functions preset in the process of step 62.

That is, the slump value indicating the viscosity of the green concrete is calculated as a function of the driving resistance of the mixer 4 with the loading amount of the green concrete as a parameter, and the driving resistance of the mixer 4 corresponds to the pressure of the hydraulic oil applied to the hydraulic motor 2. Since it is proportional, as shown in FIG. 5, the slump value can be expressed as a function of the hydraulic oil pressure with the load capacity as a parameter. Here, the relationship between the slump value and the pressure is a parabolic function shown in FIG. 5, but the controller 6 shows the relationship between the slump value and the pressure as shown in FIG. 6 in order to facilitate the calculation. Is set in advance for each load amount as a linear expression approximated to, and a function corresponding to the input value of step 61 is selected from these linear expressions.

The controller 6, which has read the detection value of the hydraulic sensor 5 in step 63, calculates the slump value from the function selected in step 62 (step 64) and displays the calculation result on the display unit 7 (step 65). ).

As the slump value increases, the driving resistance of the mixer 4 increases and the pressure of the hydraulic oil increases. Also, as the load capacity increases, the driving resistance also increases and the pressure rises. Therefore, the slump value can be correctly calculated by checking the load and the pressure.

The controller 6 constantly calculates and displays the slump value by repeating the above steps 63 to 65 until the load amount is changed by the ten-key pad 8. The driver or the operator inputs the load amount with the ten-key pad 8. The slump value can be read by simply doing so, and it is possible to easily check without eliminating the possibility of causing misunderstanding.

FIG. 7 shows another embodiment, in which the display unit 7 and the ten-key pad 8 in the first embodiment are arranged on the input display panel 11 which is the light emitting diode 12 and the dial 13, respectively, and other configurations. Is the same as in the first embodiment.

The loading amount can be easily input by rotating the dial 13, and can be easily operated even while driving the mixer car. The light emitting diode 12 is provided for each preset numerical value range, and the calculation result of the controller 6 is also rounded and displayed for each numerical value range.

[0021]

[Effect of device]

 As described above, according to the present invention, the slump value of raw concrete can be easily and accurately measured and displayed from the load set by the input means, and the read slump value can be directly used for quality control of raw concrete. It has the effect that it can be used for.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to a claim of the present invention.

FIG. 2 is a schematic view showing an embodiment of the present invention.

FIG. 3 is a schematic diagram showing an input display panel.

FIG. 4 is a flowchart showing a control flow.

FIG. 5 is a diagram showing a relationship between hydraulic pressure and a slump value.

FIG. 6 is a diagram showing a relationship between hydraulic pressure and a slump value.

FIG. 7 is a schematic view showing another embodiment.

[Explanation of symbols]

 1 Hydraulic Pump 2 Hydraulic Motor 4 Mixer 5 Hydraulic Sensor 6 Controller 7 Display 8 Numeric Keypad 50 Fluid Driving Means 51 Liquid Pressure Detecting Means 52 Input Means 53 Computing Means 54 Display Means 55 Slump Value Setting Means

Claims (1)

[Scope of utility model registration request] 1. A fluid drive means for rotationally driving a fresh concrete agitator, a means for detecting a hydraulic pressure of the fluid drive means, a means for inputting a loading amount of the fresh concrete, and a relationship between a slump value and a hydraulic pressure. A means for setting the
A slump value measuring device for ready-mixed concrete, comprising: a means for calculating a slump value from the detected value of the hydraulic pressure and an input value of the loading amount; and a means for displaying a calculation result of the calculation means.