Method for managing truss screed and management system for truss screed

Abstract

To provide a truss screed management method and a truss screed management system for simplifying height adjustment of a blade part of a truss screed.SOLUTION: A truss screed management method is characterized in that heights of a plurality of reference points 9 for measuring the height of a blade part 3 of a truss screed 1 for leveling a placing surface of concrete are measured by measuring parts 30, 35, and a plurality of adjusting nuts N provided on the truss screed are adjusted while confirming a display image displaying information on the heights of the plurality of reference points based on a measurement results to change the deflection amount of the truss screed and adjust the height of the blade part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a truss screed management method and a truss screed management system that simplify adjustment of the height of a blade portion. [Background technology]

[0002] In order to build a smooth concrete floor, there is a method that uses a truss-shaped structure called a truss screed to level the surface of the concrete after it is poured (see, for example, Patent Document 1). According to this method, a truss screed with a span length that matches the width of the concrete pouring area is placed on a pair of rails installed on both sides of the concrete pouring area. Then, when the truss screed is moved along the rails, the concrete surface is smoothed by the blade portion installed at the bottom end of the truss screed.

[0003] The truss screed has multiple truss units, and the number of truss units is increased or decreased depending on the width of the floor surface on which the concrete is poured. The connection parts between the truss units are provided with adjustment nuts such as turnbuckles that adjust the length of the upper chord of the truss, and the amount of deflection of the truss screed is changed by adjusting the multiple adjustment nuts, and the undulation of the blade part is adjusted. In order to increase the smoothness of the concrete surface, the adjustment nuts are adjusted as appropriate during the process of leveling with the truss screed, and the undulation of the blade part is measured. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-235881 Summary of the Invention [Problem to be solved by the invention]

[0005] Auto levels and digital levels are used to measure the undulations of the blade of the truss screed. When the amount of deflection of the truss screed is changed by adjusting one adjustment nut, the overall height of the blade changes around the adjustment nut. In other words, when the adjustment nut is adjusted in one place, the height of other places also changes, resulting in a large deviation. In conventional measurement methods, the process of measuring and then adjusting the adjustment nut is repeated multiple times to converge the deviation in the height of the blade.

[0006] However, in the conventional adjustment method, it was not possible to see the change in the height of the blade part at multiple points at the same time when adjusting the adjustment nut, and it was necessary to measure multiple points multiple times in order to reduce the deviation at multiple points at the same time. In addition, in the conventional adjustment method, it was not possible to grasp how the height of the blade part of the truss screed increased or decreased when operating the adjustment nut, and there was a problem that the adjustment took time by turning the adjustment nut in the opposite direction or turning the adjustment nut too much, and it depended on the skill of the worker. Therefore, with the conventional measurement method, it took time to measure and adjust the blade part, which was a bottleneck in the construction of concrete floors.

[0007] An object of the present invention is to provide a truss screed management method and a truss screed management system that simplify the height adjustment of the blade portion of the truss screed. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a method for measuring the height of a blade portion of a truss screed that levels a concrete pouring surface by measuring the heights of a plurality of reference points, and adjusting the height of the blade portion by adjusting a plurality of adjustment nuts provided on the truss screed while checking a display image showing information about the heights of the plurality of reference points based on the measurement results, thereby changing the amount of deflection of the truss screed, and using a first measuring unit that measures the height of the blade portion from one side of the truss screed and a second measuring unit that measures the height of the blade portion from the other side of the truss screed by a method different from that of the first measuring unit, and the first measuring unit: measuring the heights of the plurality of reference points in real time using a rotary laser level that rotates and irradiates a laser beam; The second measurement unit is The heights of the plurality of reference points are measured using an auto level or digital level that measures height in a horizontal direction, the laser light irradiated from an irradiation unit is received by a receiver in the first measurement unit, the distance between the preset reference point and the receiving position of the laser light is detected, and the detection result is transmitted to a management device, the second measurement unit automatically reads the scales of level sticks installed at the plurality of measurement points, and the heights of the blade portion at the plurality of measurement points are measured, and the detection results of the plurality of receivers measured by the first measurement unit and the measurement results of the plurality of measurement points by the second measurement unit are displayed on the display image of the management device, This is a method for managing a truss screed, characterized in that the plurality of adjustment nuts are adjusted while checking a displayed image, thereby adjusting the undulations of the blade portion.

[0009] According to the present invention, the height of the blade portion is measured at multiple positions and multiple adjustment nuts provided on the truss screed are adjusted, making it easy to adjust the height of the blade portion and significantly reducing the time required to adjust the height of the blade portion.

[0010] In addition, the present invention may be configured to adjust the plurality of adjustment nuts while checking a display image showing the heights and deviations of the plurality of reference points, thereby adjusting the undulations of the blade portion.

[0011] According to the present invention, by adjusting the height of the blade portion while viewing the displayed image, it is possible to grasp the change in the undulations of the blade portion in real time, thereby making it easy to adjust the height of the blade portion.

[0012] Furthermore, the present invention may be configured to measure the heights of the plurality of reference points using a rotary laser level that irradiates a laser beam while rotating.

[0013] According to the present invention, the height of the blade portion can be measured at a plurality of positions substantially simultaneously, so that the time required to adjust the height of the blade portion can be significantly reduced.

[0014] Furthermore, the present invention may be configured to measure the heights of the multiple reference points using an auto level or digital level that measures horizontal height, check the display image showing the measurement results of the heights of the multiple reference points, measure the heights of the multiple reference points in real time using the rotary laser level, and adjust the undulation of the blade portion while checking the display image showing the deviation in height based on the measurement results using the rotary laser level.

[0015] According to the present invention, the heights of multiple reference points are measured using an auto level or digital level capable of accurate measurements, and when adjusting the adjustment nut that affects the overall height of the blade section, the heights of multiple reference points are measured using a rotary laser level, which can measure instantly in real time, thereby ensuring accuracy and speed in adjusting the blade section.

[0016] The present invention provides a measuring unit that measures the heights of a plurality of reference points for measuring the height of a blade portion of a truss screed that levels a concrete pouring surface, and a display unit that displays information about the heights of the plurality of reference points based on the measurement results measured by the measuring unit. The measuring unit includes a first measuring unit that measures the height of the blade portion from one side of the truss screed, and a second measuring unit that measures the height of the blade portion from the other side of the truss screed by a method different from that of the first measuring unit. The first measuring unit measures the heights of the plurality of reference points in real time using a rotary laser level that irradiates a laser beam while rotating, and the second measuring unit measures the height in the horizontal direction using an auto level or a digital level. The heights of the plurality of reference points are measured by a laser level, the first measurement unit receives the laser light irradiated from an irradiation unit with a receiver, detects the distance between the preset reference point and a position where the laser light is received, and transmits the detection result to a management device, the second measurement unit automatically reads the scales of a level bar installed at the plurality of measurement points, and measures the heights of the blade portion at the plurality of measurement points, and the display unit of the management device displays the detection results of the plurality of receivers measured by the first measurement unit and the measurement results of the plurality of measurement points by the second measurement unit, and adjusts a plurality of adjustment nuts provided on the truss screed while checking the displayed image, thereby adjusting the undulations of the blade portion. For This is a management system for truss screeds.

[0017] According to the present invention, the measuring unit measures the height of the blade portion at multiple points, thereby shortening the measurement time, and the height of the blade portion can be easily adjusted by adjusting the height of the blade portion while viewing the height of the blade portion displayed on the display unit. Effect of the Invention

[0018] According to the present invention, the height adjustment of the blade portion of the truss screed can be simplified. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a diagram showing a configuration of a management system for a truss screed according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram showing a configuration of a management system. [Diagram 3] FIG. 11 is a diagram illustrating an example of a display image displayed on a display unit of the management device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, with reference to the drawings, an embodiment of a truss screed management method and a truss screed management system according to the present invention will be described.

[0021] As shown in FIG. 1, the truss screed 1 is placed on a pair of rails R. Concrete C is poured between the pair of rails R. The height of the pair of rails R is precisely adjusted, for example, to within ±0.5 mm. The truss screed 1 is configured with a truss structure in order to widely level the surface of the concrete C after pouring. The truss screed 1 is configured, for example, with a plurality of truss units 2, each of which is a unit of a truss, connected together. A blade portion 3 formed of a strip-shaped plate is provided at the bottom of the plurality of truss units 2. The blade portion 3 is a member for leveling the pouring surface of the concrete. The truss screed 1 is also provided with a vibration generator (not shown) for vibrating the blade portion 3 to level the surface of the concrete C.

[0022] The truss unit 2 has an upper chord 2A provided at the top, a lower chord 2B provided at the bottom, and a diagonal member 2C that diagonally connects the upper chord 2A and the lower chord 2B. The upper chord 2A, the lower chord 2B, and the upper chord 2A and the diagonal member 2C are formed using, for example, steel pipes, steel bars, L-section or H-section steel materials, etc. depending on the size of the truss unit 2.

[0023] The upper chord members 2A of the truss unit 2 are connected to each other, for example, by an adjustment nut N. The adjustment nut N is a nut used to adjust the length of the member. The adjustment nut N has, for example, a forward thread and a reverse thread formed on both ends. A forward thread and a reverse thread are formed on each end of the pair of upper chord members to be connected. The adjustment nut N is configured so that the forward thread and the reverse thread formed on the ends of the pair of upper chord members are screwed into both ends and rotated so that the forward thread and the reverse thread move closer or farther apart.

[0024] When the adjustment nut N is rotated, the length of the connected upper chord member 2A changes, and the amount of deflection of the truss screed 1 changes. When the adjustment nut N is rotated in a direction in which the connected upper chord member 2A shortens, the truss screed 1 bends downward. In this state, the blade portion 3 also bends downward in conjunction. When the adjustment nut N is rotated in a direction in which the upper chord member 2A extends, the truss screed 1 deforms in a direction in which it warps upward. In this state, the blade portion 3 also warps upward in conjunction. Therefore, the amount of deflection of the truss screed 1 is adjusted by the multiple adjustment nuts N.

[0025] The longer the span, the more the truss screed 1 bends downwards due to its own weight. In addition, when the concrete C is leveled, the blade portion 3 bends upwards due to the rise of the concrete C. For this reason, the height of the blade portion 3 is adjusted by the adjustment nut N to make the pouring surface of the concrete C uniform. As described above, when the adjustment nut N is adjusted at one location, the overall height of the blade portion 3 changes. For this reason, the heights of multiple locations on the blade portion 3 are measured in order to manage how much each of the multiple adjustment nuts N should be adjusted.

[0026] In order to measure the height of the blade portion 3, a plurality of measurement targets 5 and a plurality of level bars B are provided on the truss screed 1. The measurement target 5 is a device for measuring the height of the blade portion 3 by a first measurement unit 30 described below. The plurality of measurement targets 5 are provided, for example, at equal intervals between the plurality of truss units 2. The plurality of measurement targets 5 do not necessarily have to be provided between the plurality of truss units 2.

[0027] The measurement target 5 has a rod-shaped main body 5A. The main body 5A is detachably attached to the truss screed 1 along the vertical direction. The main body 5A is installed so that the lower end 6 is at the same height as the blade portion 3. A light receiver 8, which will be described later, is attached to an upper end 7 of the main body 5A. The light receiver 8 is attached a predetermined distance above the lower end 6.

[0028] The level bar B is an instrument for optically measuring the height of the blade section 3 by the second measuring section 35 described later. The level bar B is detachably attached to the truss screed 1 along the vertical direction adjacent to the main body section 5A. The level bar B is a rod-shaped body for surveying with a scale printed on its surface. The scale of the level bar B is printed with, for example, a barcode staff that is automatically read by a digital level described later. The level bar B is installed so that the lower end 13 is at the same height as the blade section 3. The level bar B may be formed integrally with the measurement target 5. One level bar B may be reused for surveying multiple locations.

[0029] Next, the management system 20 for managing the height of the truss screed 1 will be described.

[0030] The management system 20 comprises a first measuring unit 30 that performs laser measurement, a receiver 8 that receives laser light, a second measuring unit 35 that performs optical measurement, and a management device 40 that receives measurement data from the first measuring unit 30. The first measuring unit 30 comprises an irradiating unit 31 that irradiates laser light. The irradiating unit 31 is a rotary laser level that irradiates laser light while rotating along a horizontal plane. The irradiating unit 31 is installed on a tripod 32 or the like so that the height at which the laser light is irradiated is approximately the same as the height of the receiver 8.

[0031] The irradiation unit 31 automatically adjusts the rotation plane of the laser light so that it is aligned with the horizontal plane. The irradiation unit 31 can irradiate the laser light within a range of 360 degrees. The irradiation unit 31 is adjusted so that the laser light is irradiated within a predetermined angle range in which the multiple light receivers 8 are installed.

[0032] The light receiver 8 is a device that receives the laser light irradiated from the irradiation unit 31 and measures the level (height) of the laser light. The light receiver 8 includes a reference point 9, a light receiving unit 10 that receives the laser light, a display unit 11 (see FIG. 2) that displays the measurement results, and a transmission unit 12 (see FIG. 2) that transmits the measurement results.

[0033] The light receiving unit 10 receives the laser light within a range of a predetermined width in the vertical direction. The reference point 9 is set, for example, at the center of the light receiving unit 10 in the vertical direction. When the light receiving unit 10 receives the laser light, the light receiver 8 detects the distance between the reference point 9 and the receiving position of the laser light. The light receiver 8 displays the measurement result of the distance between the reference point 9 and the receiving position on the display unit 11. The light receiver 8 transmits the measurement result to the management device 40 via the transmission unit 12.

[0034] The second measuring unit 35 is a device that precisely optically measures the height of the blade portion 3 using a level bar B. For example, a digital level, an auto level, or other device is used as the second measuring unit 35. The second measuring unit 35 measures a predetermined height in the horizontal direction, and measures the amount of height deviation (deviation) from a reference point 9. The reference point is not limited to the reference point 9, and other positions may be used. The second measuring unit 35 can automatically read the scales of the level bar B installed at multiple measurement points, and measure the height of the blade portion 3 at the multiple measurement points.

[0035] 2, the management device 40 includes a receiving unit 41 that receives the measurement results, a display unit 42 that displays the positions of the multiple light receivers 8 that have been received, a storage unit 43 that stores the measurement results, and a control unit 44 that performs overall control of the device. The management device 40 is realized by a terminal device such as a personal computer, a tablet terminal, or a smartphone.

[0036] The control unit 44 is realized by a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit) executing a program (software). Some or all of these functional units may be realized by hardware such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable Gate Array), or may be realized by a combination of software and hardware.

[0037] The program may be stored in advance in a storage device such as a hard disk drive (HDD) or flash memory, or may be stored in a removable storage medium such as a DVD or CD-ROM and installed in the storage device by inserting the storage medium into a drive device.

[0038] The display unit 42 is, for example, a display device such as an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, an LED (Light Emitting Diode) display, etc. The display unit 42 does not necessarily have to be provided in the management device 40, and may be realized by another terminal device such as a personal computer, a tablet terminal, or a smartphone that is connected to the management device 40 wirelessly or via a wire.

[0039] The control unit 44 generates a display image K (see FIG. 3) showing the measurement results of the multiple measurement points by the second measurement unit 35 and the measurement results of the levels of the multiple light receivers 8 received by the receiving unit 41 of the first measurement unit 30. The control unit 44 causes the display unit 42 to display the display image K in real time.

[0040] 3, the display image K displays the measurement results of the multiple measurement points by the second measuring unit 35 and the level measurement results of the multiple light receivers 8 in the installation order of the multiple light receivers 8. In addition to a numerical value K1 indicating the distance from the reference point 9, the display image K also displays an indicator K3 indicating the amount of level by its width. The display image K also displays a moving average K2 of the displacement caused by the adjustment.

[0041] The display image K allows the relative levels of the multiple light receivers 8 to be grasped. The light receivers 8 are attached at a predetermined distance above the blade portion 3, so the undulating state of the blade portion 3 can be grasped in real time based on the level measurement results of the multiple light receivers 8.

[0042] Next, a method for managing the truss screed to adjust the height of the blade portion 3 will be described.

[0043] A worker attaches a plurality of measurement targets 5 and a plurality of level rods B to the truss screed 1 as appropriate (for example, every 2 m travel) during the process of leveling the concrete pouring surface. The worker installs the first measurement unit 30 and the second measurement unit 35 at a location spaced apart from the truss screed 1. The worker adjusts the height of the tripod 32 so that the height of the laser light irradiated from the irradiation unit 31 is approximately the height of the reference point 9 of the light receiver 8. The worker adjusts the height of the tripod 36 so that the height observed by the second measurement unit 35 is approximately within the range of the scale of the level rod B.

[0044] The worker automatically reads the scales of the multiple level bars B using the second measuring unit 35, measures the height of the blade portion 3 at multiple observation points (e.g., five locations), and determines the deviation of the height of the blade portion 3 from the reference level. The worker inputs the measurement results of the height of the blade portion 3 at the multiple observation points to the management device 40. The management device 40 generates a display image K showing information related to the height of the blade portion 3 at the multiple observation points, and displays it on the display unit 42.

[0045] Then, a rotating laser beam is emitted from the first measuring unit 30, and the laser beam is irradiated onto the multiple light receivers 8. Information on the level of the laser beam received from the light receivers 8 is transmitted to the management device 40. Based on the information received from the light receivers 8, the management device 40 updates the display image K and displays it on the display unit 42. The management device 40 displays on the display unit 42 a display image K that displays information on a plurality of reference points including the measurement results of the height of the blade section 3 at a plurality of observation points by the second measurement unit 35 and the real-time measurement results of the deviation of the blade section 3 at a plurality of observation points by the first measurement unit 30. The worker checks the display image K displayed on the display unit 42 of the management device 40.

[0046] Based on the displayed image K, the worker adjusts the multiple adjustment nuts N while checking the overall level of the multiple receivers 8, changes the amount of deflection of the truss screed 1, and adjusts the overall height of the blade portion 3. The worker checks the overall level of the multiple receivers 8, turns the adjustment nuts N of the parts where the level is uneven, and adjusts so that the level is within the allowable range. The worker adjusts the adjustment nuts N to smooth out the undulations of the blade portion 3, and adjusts so that the blade portion 3 is approximately straight.

[0047] As described above, according to the management system 20 for the truss screed 1, the height of the blade section 3 can be grasped in real time from the display image K displayed on the display unit 42 of the management device 40, so that the height of the blade section 3 can be easily adjusted. According to the management system 20, after the positions of multiple observation points are accurately measured by the second measurement unit 35, the measurement results by the first measurement unit 30 are used as the real-time positions (deviations) of the multiple observation points when adjusting the height of the blade section 3, so that the height of the blade section 3 can be accurately adjusted. According to the management system 20, the height of the blade section 3 can be adjusted in a short time without relying on the skill of the worker.

[0048] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above embodiment, the height of the blade portion 3 is adjusted by combining the measurement of the height of the blade portion 3 using an auto level or digital level and the measurement of the height of the blade portion 3 using a rotary laser level. However, if the required construction accuracy can be ensured, the height of the blade portion 3 may be measured using only the rotary laser level. [Explanation of symbols]

[0049] 1 Truss screed 2 Truss unit 2A Top chord 2B Lower Chord 2C Diagonal 3 Blade section 5. Measurement target 5A Main body 8 Receiver 9 Reference points 10 Light receiving part 11 Display section 12 Transmitter 20 Management Systems 30 First Measurement Section 31 Irradiation unit 35 Second Measurement Section 40 Management device 41 Receiving section 42 Display section 43 Storage section 44 Control section B Level bar K Display Image N Adjustment nut

Claims

1. Measure the height of multiple reference points to measure the height of the blade part of the truss screed that levels the concrete pouring surface, While checking a display image showing information regarding the heights of the plurality of reference points based on the measurement results, a plurality of adjustment nuts provided on the truss screed are adjusted to change the amount of deflection of the truss screed and adjust the height of the blade portion; The measurement is performed using a first measurement unit that measures the height of the blade portion from one side of the truss screed and a second measurement unit that measures the height of the blade portion from the other side of the truss screed by a method different from that of the first measurement unit, The first measurement unit measures heights of the plurality of reference points in real time using a rotary laser level that rotates and irradiates a laser beam, The second measurement unit measures the heights of the plurality of reference points using an auto level or a digital level that measures height in a horizontal direction, In the first measurement unit, the laser light irradiated from the irradiation unit is received by a receiver, a distance between the preset reference point and a receiving position of the laser light is detected, and a detection result is transmitted to a management device; In the second measurement unit, automatically reading the scales of a level bar installed at a plurality of measurement points and measuring the height of the blade portion at the plurality of measurement points; The display image of the management device displays detection results of the plurality of light receivers measured by the first measurement unit and measurement results of the plurality of measurement points by the second measurement unit, The adjustment nuts are adjusted while checking the displayed image, thereby adjusting the undulations of the blade portion. How to manage truss screeds.

2. A measuring unit that measures the height of a plurality of reference points for measuring the height of a blade portion of a truss screed that levels a concrete pouring surface; a display unit that displays information about heights of the plurality of reference points based on the measurement results measured by the measurement unit, The measurement unit includes a first measurement unit that measures the height of the blade portion from one side of the truss screed, and a second measurement unit that measures the height of the blade portion from the other side of the truss screed by a method different from that of the first measurement unit. The first measurement unit measures heights of the plurality of reference points in real time using a rotary laser level that rotates and irradiates a laser beam, The second measurement unit measures the heights of the plurality of reference points using an auto level or a digital level that measures height in a horizontal direction, In the first measurement unit, the laser light irradiated from the irradiation unit is received by a receiver, a distance between the preset reference point and a receiving position of the laser light is detected, and a detection result is transmitted to a management device; In the second measurement unit, automatically reading the scales of a level bar installed at a plurality of measurement points and measuring the height of the blade portion at the plurality of measurement points; The display unit of the management device displays detection results of the plurality of light receivers measured by the first measurement unit and measurement results of the plurality of measurement points by the second measurement unit, A truss screed management system for adjusting a plurality of adjustment nuts provided on the truss screed while checking the displayed image, thereby adjusting the undulation of the blade portion.

Images