Mounting bracket for formwork side pressure sensor and formwork structure

Abstract

To provide a side pressure sensor attaching metal fitting for a mold capable of improving workability of side pressure measurement of the mold by easily changing an attachment position of a side pressure sensor without detaching a lateral end large member or an end large member pressing metal fitting.SOLUTION: A side pressure sensor attaching metal fitting comprises: a sensor attaching base metal fitting 11 provided with an end large member abutment part 11b abutting on a lateral end large member 3b as well as a screw bar 5 penetrating through an end large member pressing metal fitting 4 and a very large through hole 11a1 through which a fastening nut 6 screwed on the screw rod 5 passes, on which a side pressure sensor 7 is attached; and an insertion washer 12 hinged on the sensor attaching base metal fitting 11 as well as provided with a cutout part 12b through which the screw rod 5 penetrating through the end large member pressing metal fitting 4 and the sensor attaching base metal fitting 11 passes and fastened on the sensor attaching base metal fitting 11 with the fasten nut 6 screwed on the screw rod 5 penetrating through the cutout part 12b.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a side pressure sensor mounting fitting for a formwork for mounting a side pressure sensor that measures the side pressure of concrete applied to the formwork during concrete placement, and a formwork structure using the side pressure sensor mounting fitting for the formwork.

Background Art

[0002] In a formwork structure for constructing a concrete structure, in order to prevent the formwork from being destroyed due to the pressure of the concrete filled in the formwork becoming too high during concrete placement, the side pressure applied to the formwork during concrete placement is measured. For example, in Patent Document 1, a side pressure sensor such as a load cell body having a female screw portion screwed to a separator and a screw for screwing a formwork tightening rod is provided between a formwork (weir plate) and a horizontal end member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technique described in the above patent document, since a side pressure sensor such as a load cell body is provided between a formwork (weir plate) and a horizontal end member, when changing the mounting position of the side pressure sensor, it is necessary to remove the horizontal end member, the end member pressing fitting (washer), etc., and there is a problem of poor workability.

[0005] Therefore, the present invention has been made in view of such problems, and an object thereof is to provide a side pressure sensor mounting fitting for a formwork and a formwork structure that can easily change the mounting position of the side pressure sensor without removing the horizontal end member and the end member pressing fitting, and improve the workability of side pressure measurement of the formwork.

Means for Solving the Problems

[0006] To solve the above problems, the mounting bracket for a formwork side pressure sensor according to the present invention comprises a sensor mounting base bracket to which a side pressure sensor for measuring the side pressure applied to the formwork is attached, and which has an oversized through hole with an inner diameter larger than the outer diameter of a threaded rod that passes through the end material holding the formwork bracket and the width of a nut that screws onto the threaded rod, and a washer which has a notch that is larger than the outer diameter of the threaded rod and narrower than the width of the nut, and the sensor mounting base bracket is fastened by a nut that passes through the end material holding bracket and the oversized through hole of the sensor mounting base bracket and screws onto the threaded rod that passes through the notch of the washer. Furthermore, the mounting bracket for formwork side pressure sensors according to the present invention is characterized in that the sensor mounting base bracket is provided with a projection that protrudes upward, while the washer is provided with a fastening portion that is spaced at approximately the same interval as the width of the projection, and fastening portions are provided on both sides of the projection when the washer is fastened to the sensor mounting base bracket. Furthermore, the mounting bracket for formwork side pressure sensors according to the present invention is characterized in that the sensor mounting base bracket comprises a back plate portion provided with the oversized through hole, and a pair of legs provided on both sides of the back plate portion to which the side pressure sensor is attached, wherein the distance between the pair of legs is greater than the width of the end timber retaining bracket, and the height of the pair of legs is greater than the height of the end timber retaining bracket, and the bracket is fastened and attached by a nut that is screwed onto the threaded rod via a washer so as to cover the end timber retaining bracket and not come into contact with the end timber retaining bracket with a gap between them. Furthermore, the formwork structure according to the present invention is a formwork structure in which a stud supporting a weir board is held in place by a stud fastening fitting, characterized in that a nut that is screwed onto a threaded rod passing through the stud fastening fitting and presses the stud fastening fitting against the stud is loosened to form one of the above-mentioned formwork side pressure sensor mounting fittings, the threaded rod and nut are passed through the oversized through hole of the sensor mounting base fitting to which the side pressure sensor is attached, a washer constituting the formwork side pressure sensor mounting fitting is inserted between the sensor mounting base fitting and the nut, the threaded rod is passed through the notch of the washer, and the nut is tightened to attach the formwork side pressure sensor mounting fitting to which the side pressure sensor is attached. [Effects of the Invention]

[0007] The formwork side pressure sensor mounting bracket according to the present invention comprises a sensor mounting base bracket and a washer. The sensor mounting base bracket is provided with a part that contacts the end beam and an oversized through hole through which the threaded rod of the end beam retaining bracket and the nut that screws onto the threaded rod pass. The washer is provided with a notch that is larger than the outer diameter of the threaded rod and narrower than the width of the nut. Therefore, in a formwork structure in which the outside of the weir board is held in place by a retaining bracket via vertical and horizontal retaining brackets, the formwork structure is formed by passing a threaded rod and a nut that screws onto the threaded rod through the oversized through hole of the sensor mounting base bracket, and then passing the threaded rod through the notch of the washer and tightening the nut. As a result, it becomes possible to change the mounting position of the lateral pressure sensor without removing the lateral bracing members or bracing member retaining brackets, thereby improving the workability of measuring the lateral pressure of the formwork. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing the formwork on the side to which the side pressure sensor is attached using the formwork side pressure sensor mounting bracket according to an embodiment of the present invention. [Figure 2] This is an enlarged perspective view of portion A in Figure 1. [Figure 3]This is a perspective view showing the sensor mounting base fitting, which constitutes the mounting bracket for a formwork side pressure sensor according to an embodiment of the present invention, with the insert washer and the like removed. [Figure 4] (a) and (b) are perspective views of the sensor mounting base fittings that constitute the formwork side pressure sensor mounting fitting according to the embodiment of the present invention. [Figure 5] (a) to (e) are plan view, left side view, front view, BB line cross-sectional view, and bottom view of the sensor mounting base fitting that constitutes the formwork side pressure sensor mounting fitting according to the embodiment of the present invention. [Figure 6] (a) and (b) are perspective views of washers constituting mounting brackets for formwork side pressure sensors according to embodiments of the present invention. [Figure 7] (a) to (d) are plan view, front view, left side view, and cross-sectional view along line CC of the washer constituting the mounting bracket for the formwork side pressure sensor according to the embodiment of the present invention, respectively. [Figure 8] (a) and (b) are perspective views showing the installation procedure of a formwork side pressure sensor mounting bracket according to an embodiment of the present invention, respectively, one showing the state in which the end beam retaining bracket is pressed against the end beam with a tightening nut, and the other showing the state in which the tightening nut is loosened. [Figure 9] (a) and (b) are perspective views showing the installation procedure of a formwork side pressure sensor mounting bracket according to an embodiment of the present invention, respectively, showing the state in which the sensor mounting base bracket constituting the formwork side pressure sensor mounting bracket of the embodiment is moved to insert the threaded rod from which the tightening nut has been loosened, and a perspective view showing the state after the sensor mounting base bracket has been inserted. [Figure 10] (a) and (b) are perspective views showing the installation procedure of a formwork side pressure sensor mounting bracket according to an embodiment of the present invention, respectively. (a) is a perspective view showing the state in which the sensor mounting base bracket constituting the formwork side pressure sensor mounting bracket of the embodiment is inserted into the threaded rod with the tightening nut loosened, and then moved to insert the insert washer. (b) is a perspective view showing the state in which the insert washer has been inserted and then tightened with the tightening nut. [Figure 11]It is a front view showing a state in which a sensor mounting base fitting constituting a side pressure sensor mounting fitting for a formwork according to an embodiment of the present invention is provided so as to cover an end joist pressing fitting 4 with a tightening nut via a washer. [Figure 12] It is a side view showing a state in which a sensor mounting base fitting constituting a side pressure sensor mounting fitting for a formwork according to an embodiment of the present invention is provided so as to cover an end joist pressing fitting 4 with a tightening nut via a washer. [Figure 13] It is a bottom view showing a state in which a sensor mounting base fitting constituting a side pressure sensor mounting fitting for a formwork according to an embodiment of the present invention is provided so as to cover an end joist pressing fitting 4 with a tightening nut via a washer. [Figure 14] It is an enlarged view of part D in FIG. 13.

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of a side pressure sensor mounting fitting for a formwork and a formwork structure according to the present invention will be described with reference to the drawings. The embodiments described below are merely examples of the present invention, and the present invention is not limited to the following embodiments and can be appropriately changed within the scope of creation of the technical idea of the present invention.

[0010] A side pressure sensor mounting fitting 1 for a formwork and a formwork structure according to an embodiment of the present invention will be described. First, a formwork structure in which a side pressure sensor 7 is installed using the side pressure sensor mounting fitting 1 of the embodiment will be described.

[0011] <Configuration of the formwork structure> The formwork for placing concrete is composed of two sets of retaining plates 2 supported from the outside by vertical end joists 3a and horizontal end joists 3b as shown in FIG. 1, and the vertical end joists 3a and horizontal end joists 3b are pressed by end joist pressing fittings 4 tightened by tightening nuts 6 screwed onto screw rods 5.

[0012] The end joist pressing fitting 4 is composed of a back plate portion in which a screw rod through hole (not shown) through which the screw rod 5 passes is formed, as shown in FIGS. 11 to 14 and the like described later, and a pair of side plate portions that are bent 90 degrees from both the left and right sides of the back plate portion and extend so as to face each other. On the front end surfaces of the pair of side plate portions, two end joist abutting portions are provided that are cut out according to the outer shape of the horizontal end joist 3b so that the horizontal end joist 3b made of a round pipe or the like can be reliably pressed. The two horizontal end joists 3b are configured to be pressed by these two end joist abutting portions.

[0013] The screw rod 5 is connected via shaft feet (not shown) connected to both sides of a separator (not shown) that keeps the two sets of weir plates 2 at a predetermined interval. A screw portion 5a to which a tightening nut 6 is screwed is provided on its outer periphery. Usually, a retaining portion 5b is provided at its tip end portion by crushing or the like so that the tightening nut 6 does not fall off. Incidentally, members constituting the formwork such as the weir plate 2, the vertical end joist 3a, the horizontal end joist 3b, the end joist pressing fitting 4, the screw rod 5, and the tightening nut 6 are well-known.

[0014] And the side pressure sensor 7 for measuring the concrete pressure during concrete placement on the weir plate 2 is also well-known. There are sensors called load cells or strain gauges, etc., but stress paint may also be used. In the present embodiment, the case of using a sensor called a load cell or a strain gauge, etc. is described. As described later, it is attached to each of the pair of leg portions 11b, 11b of the sensor mounting base metal fitting 11 that constitutes the formwork side pressure sensor mounting fitting 1. The measured values detected by each side pressure sensor 7 are sent to a data logger 9 via a probe 8 having a signal line 7a, and are configured to be displayed, recorded, data-processed, etc.

[0015] <Configuration of the formwork side pressure sensor mounting fitting 1 of the embodiment> The formwork side pressure sensor mounting bracket 1 of this embodiment is installed so as to cover the end beam retaining bracket 4 that holds down the horizontal end beam 3b, as shown in Figures 1 and 2, and also in Figures 11 to 14 described later. As shown in Figure 3, it consists of a sensor mounting base bracket 11, a insert washer 12, a connecting chain 13, and protective covers 14a to 14c, and the connecting chain 13 and protective covers 14a to 14c may be omitted. In Figure 3, 7 is a side pressure sensor called a load cell or strain gauge, 7a is a signal line that sends the strain value measured by the side pressure sensor 7, 8 is a probe that bundles the signal line 7a, and 8a is a probe retaining bracket that fixes the probe 8 to the sensor mounting base bracket 11.

[0016] (Sensor mounting base bracket 11) As shown in Figures 4 and 5, the sensor mounting base bracket 11 is constructed by cutting a steel plate into a predetermined shape and then bending it. It consists of a back plate portion 11a and a pair of leg portions 11b, 11b that are bent 90 degrees from both the left and right sides of the back plate portion 11a, and is formed in a U-shape when viewed from above.

[0017] The back panel portion 11a has an oversized through-hole 11a1 in its approximate center through which a threaded rod 5 and a tightening nut 6 pass, which penetrate the end beam retaining bracket 4, and a projection 11a2 that protrudes upward with a width W1 (see Figure 5(c)) is provided at its upper end.

[0018] Here, the inner diameter R of the oversized through hole 11a1 is formed to be larger than the outer diameter of the threaded rod 5 and the maximum width of the tightening nut 6, so as to be large enough for the threaded rod 5 and the tightening nut 6 to pass through.

[0019] Furthermore, below the back plate portion 11a, there is a screw hole 11a3 through which a screw passes for fixing a probe retaining bracket 8a that holds down the probe 8, which transmits the measurement signal measured by the side pressure sensor 7.

[0020] Furthermore, the inner width W2 of the back panel portion 11a is formed to be larger than the width W3 of the end beam retaining bracket 4, as shown in Figure 14 and other figures described later.

[0021] The tip surfaces of the pair of legs 11b, 11b are provided with two end member contact portions 11b1 that are cut out according to the outer shape of the horizontal end member 3b, which is made of round pipe or the like, so that they can be securely held in place. The two end member contact portions 11b1 are configured to hold down the two horizontal end members 3b.

[0022] The height H1 of the pair of legs 11b, 11b is set higher than the height H2 of the end beam retaining bracket 4, as shown in Figure 12 later. When the formwork side pressure sensor mounting bracket 1 of the embodiment is attached to the outside of the end beam retaining bracket 4 so as shown in Figures 13 and 14, a gap G1, G2 (see Figure 14) is created between the end beam retaining bracket 4 and the formwork side pressure sensor mounting bracket 1, so that the formwork side pressure sensor mounting bracket 1 does not come into contact with the end beam retaining bracket 4. The side pressure sensors 7 attached to each of the pair of legs 11b, 11b detect the pressure of the concrete on the weir plate 2. At this time, the side pressure sensors 7 are attached to the pair of legs 11b, 11b, but this is not limited to this, and the side pressure sensors 7 may also be attached to the surface of the back plate portion 11a.

[0023] Furthermore, at least one of the pair of legs 11b, 11b, has a chain connecting hole 11b2 (see Figure 4(b)) above it to which one end of the connecting chain 13 is connected.

[0024] (Insertable washer 12) The insert washer 12 is formed as shown in Figures 6 and 7, and at its upper end, it is provided with a pair of latching portions 12a, 12a that are bent 90 degrees in the same direction on both sides and spaced at approximately the same distance W1' (see Figure 7(b) as the width W1 of the projection 11a2 of the sensor mounting base fitting 11), and a notch 12b through which the threaded rod 5 that penetrates the end-thickness retaining bracket 4 and the sensor mounting base fitting 11 passes.

[0025] By making the spacing W1' between the pair of latching parts 12a, 12a approximately the same as the width W1 of the projection 11a2 of the sensor mounting base fitting 11, when the insert washer 12 and the sensor mounting base fitting 11 are fixed by the tightening nut 6 of the end beam retaining fitting 4, the pair of latching parts 12a, 12a that latch onto both sides of the projection 11a2 are latched onto both sides of the projection 11a2, thereby preventing the insert washer 12 from falling and preventing the insert washer 12 from rotating together with the sensor mounting base fitting 11.

[0026] Furthermore, a chain connecting hole 12c1 is provided in the protruding portion 12c of the insert washer 12, which remains unbent and sandwiched between the pair of latching portions 12a, 12a, to which the other end of the connecting chain 13 is connected.

[0027] (Connecting chain 13) As shown in Figure 3, the connecting chain 13 is connected to a chain connecting hole 11b2 (see Figures 4(b) and 5(d), etc.) provided in one leg 11b of the sensor mounting base fitting 11 and to a chain connecting hole 12c1 (see Figures 6 and 7, etc.) provided in the protruding part 12c of the insert washer 12, preventing the insert washer 12 from being lost from the sensor mounting base fitting 11.

[0028] (Protective cover 14a~14c) The protective covers 14a to 14c are made of resin or the like and are attached below the pair of legs 11b, 11b and the back plate 11a of the sensor mounting base fitting 11 to protect the side pressure sensors 7 and the junction point of the signal lines 7a provided on each of the pair of legs 11b, 11b, as well as the probe retaining bracket 8a, etc.

[0029] <Installation of the formwork side pressure sensor mounting bracket 1 in the embodiment> Next, the installation procedure for the formwork side pressure sensor mounting bracket 1 configured as described above will be explained.

[0030] As shown in Figure 8(a), a retaining bracket 4 is attached to the horizontal retaining bracket 3b on the outside of the formwork board 2 that constitutes the formwork. Then, the formwork lateral pressure sensor mounting bracket 1 is attached to determine the location where the lateral pressure of the concrete inside the formwork will be measured, and as shown in Figure 8(b), the tightening nut 6 of the horizontal retaining bracket 4 at that mounting location is loosened.

[0031] Next, as shown in Figure 9(a), the side pressure sensors 7 are attached to the pair of legs 11b, 11b, and the sensor mounting base fitting 11, which has protective covers 14a to 14c attached, is attached to the threaded rod 5, and the horizontal end beam 3b is fitted into the end beam contact portion 11b1. Here, the inner diameter R of the oversized through hole 11a1 is formed to be excessively large so that the outer diameter of the threaded rod 5 and the tightening nut 6 of the end beam retaining fitting 4 can pass through, so that the threaded rod 5 can be passed through with the tightening nut 6 screwed onto it, as shown in Figure 9(b).

[0032] Next, as shown in Figure 10(a), insert the washer 12 from above between the back plate portion 11a of the sensor mounting base fitting 11 and the tightening nut 6, and then tighten the tightening nut 6 as shown in Figure 10(b).

[0033] As a result, the sensor mounting base bracket 11 is positioned so as to overlap the end beam retaining bracket 4, with the two end beam contact points 11b1, 11b1 at the tips of the pair of legs 11b, 11b contacting the two horizontal end beams 3b, allowing the sensor mounting base bracket 11 with the side pressure sensor 7 attached to it to be attached to the formwork.

[0034] Therefore, when concrete is poured into the formwork, the lateral pressure sensors 7 attached to the legs 11b, 11b on both sides of the sensor mounting base fitting 11 measure the lateral pressure applied to the weir plate 2. Each measured value is sent to the data logger 9 via the probe 8, where it is displayed, recorded, and processed.

[0035] Figures 11 to 13 are rear, side, and bottom views, respectively, showing the sensor mounting base fitting 11, which constitutes the formwork side pressure sensor mounting bracket 1 of the embodiment, being fastened to the two horizontal end members 3b, 3b via a tightening nut 6 and inserting washer 12. Figure 14 is an enlarged view of part D in Figure 13. Note that in Figures 11 to 14, the connecting chain 13, protective covers 14a to 14c, signal wire 7a, probe 8, probe retaining fitting 8a, etc., are omitted from the illustration in order to clarify the relationship between the horizontal end members 3b, 3b, the end member retaining fitting 4, and the sensor mounting base fitting 11 and inserting washer 12 that constitute the formwork side pressure sensor mounting bracket 1.

[0036] As shown in Figures 11 to 14, when the formwork side pressure sensor mounting bracket 1 is attached to the horizontal end beam 3b by tightening the tightening nut 6 of the threaded rod 5 that passes through the end beam retaining bracket 4, the back plate portion 11a of the sensor mounting base bracket 11 has legs 11b that are high enough so that they do not come into contact with the end beam retaining bracket 4. Therefore, gaps G1 and G2 are created between the sensor mounting base bracket 11 to which the side pressure sensor 7 is attached and the end beam retaining bracket 4, more specifically between the back plate portion 11a and the end beam retaining bracket 4, and the sensor mounting base bracket 11 and the end beam retaining bracket 4 do not come into contact and interfere with each other. As a result, the side pressure sensors 7 attached to each leg portion 11b, 11b of the sensor mounting base bracket 11 can accurately measure the side pressure applied to the formwork through the horizontal end beams 3b, 3b without being affected by the end beam retaining bracket 4.

[0037] Thus, with the formwork side pressure sensor mounting bracket 1 of this embodiment, by simply loosening the tightening nut 6 of the threaded rod 5 that passes through the end beam retaining bracket 4 and then tightening it, the sensor mounting base bracket 11 on which the side pressure sensor 7 is provided can be attached to the formwork without removing the end beam retaining bracket 4 from the horizontal end beam 3b, etc., and the mounting position of the sensor mounting base bracket 11 can also be changed.

[0038] <Summary of the formwork side pressure sensor mounting bracket 1 according to the embodiment of the present invention> As described above, the formwork side pressure sensor mounting bracket 1 of the embodiment of the present invention is attached so as to cover the end beam retaining bracket 4 and has an oversized through hole 11a1 through which a threaded rod 5 and a tightening nut 6 that pass through the end beam retaining bracket 4 pass, and has a sensor mounting base bracket 11 to which a side pressure sensor 7 is attached, and has a notch 12b through which a threaded rod 5 that passes through the end beam retaining bracket 4 and the sensor mounting base bracket 11 pass, and is tightened to the sensor mounting base bracket 11 by a tightening nut 6 that is screwed onto the threaded rod 5 that passes through the notch 12b.

[0039] Therefore, even when changing the mounting position of the side pressure sensor 7, the formwork side pressure sensor mounting bracket 1 to which the side pressure sensor 7 is attached can be attached and detached without removing the horizontal end member 3b or the end member retaining bracket 4. Since the mounting position of the side pressure sensor 7 can be changed simply by changing the position of the formwork side pressure sensor mounting bracket 1, the workability of measuring the side pressure of the formwork when changing the mounting position of the side pressure sensor 7 can be improved.

[0040] Furthermore, in the formwork side pressure sensor mounting bracket 1 of this embodiment, the inner width W2 of the back plate portion 11a of the sensor mounting base bracket 11 is larger than the width W3 of the end beam retaining bracket 4, and the height H1 of the pair of legs 11b, 11b is higher than the height H2 of the end beam retaining bracket 4. When the sensor mounting base bracket 11 is mounted so as to cover the end beam retaining bracket 4, a gap G1, G2 (see Figure 13) is created between the formwork side pressure sensor mounting bracket 1 and the end beam retaining bracket 4, so that the sensor mounting base bracket 11 and the end beam retaining bracket 4 are mounted without contact.

[0041] Therefore, since the mounting base bracket 11 to which the lateral pressure sensor 7 is attached does not interfere with the end beam retaining bracket 4, the lateral pressure of the concrete applied to the weir board 2 can be measured directly through the horizontal end beam 3b without going through the end beam retaining bracket 4, thus enabling more accurate measurement of the lateral pressure of the concrete.

[0042] Furthermore, in the formwork side pressure sensor mounting bracket 1 of the embodiment of the present invention, the sensor mounting base bracket 11 is provided with a projection 11a2 that protrudes upward, while the insert washer 12 is provided with a pair of latching portions 12a, 12a that are spaced apart by a distance W1' that is approximately the same as the width W1 of the projection 11a2.

[0043] Therefore, when inserting the insert washer 12 between the sensor mounting base fitting 11 and the tightening nut 6 so that the threaded rod 5 is positioned in the notch 12b of the insert washer 12, and then rotating the tightening nut 6 to tighten the sensor mounting base fitting 11 and the insert washer 12, if the insert washer 12 tries to rotate together with the tightening nut 6, the pair of locking parts 12a, 12a on the upper part of the insert washer 12 come into contact with both end faces of the projection 11a2 on the upper part of the sensor mounting base fitting 11, preventing the insert washer 12 from rotating together with the sensor mounting base fitting 11. This also improves work efficiency. [Explanation of Symbols]

[0044] 1. Mounting bracket for formwork side pressure sensor 11 Sensor mounting base bracket 11a Back plate part 11a1 Oversized through hole 11a2 Protrusion 11b Legs 11b1 Thick material contact part 11b2 Chain connection hole 12. Insert washer (washer) 12a Latch part 12b Notch 12c protrusion 12c1 Chain connection hole 13 Linked chains 14a~14c Protective cover 2 Weir plate 3a Vertical thick timber 3b Horizontal thick lumber 4. End-piece timber retaining bracket 5 threaded rods 6. Tightening nut 7. Side pressure sensor 8 probes 9. Data Logger

Claims

1. A sensor mounting base bracket is provided, which has a part that contacts the end members that hold the formwork in place, and an oversized through hole with an inner diameter larger than the outer diameter of the threaded rod that passes through the end member retaining bracket and the width of the nut that screws onto the threaded rod, and to which a side pressure sensor for measuring the side pressure applied to the formwork is attached, The device comprises a washer having a notch that is larger than the outer diameter of the threaded rod and narrower than the width of the nut, The formwork side pressure sensor mounting bracket is characterized in that the sensor mounting base bracket is fastened by a nut that passes through the oversized through-hole of the end-thick member retaining bracket and the sensor mounting base bracket and is screwed onto the threaded rod that passes through the notch of the washer.

2. In the mounting bracket for a formwork side pressure sensor according to claim 1, The aforementioned sensor mounting base bracket is provided with a projection that protrudes upward, The formwork side pressure sensor mounting bracket is characterized in that the washer is provided with hooking portions on both sides of the projection, which are provided at intervals approximately the same as the width of the projection, and when the washer is hooked onto the sensor mounting base bracket, the hooking portions are provided.

3. In the mounting bracket for a formwork side pressure sensor according to claim 1, The aforementioned sensor mounting base bracket is A formwork side pressure sensor mounting bracket comprising a back plate portion provided with the oversized through-hole, and a pair of legs provided on both sides of the back plate portion to which the side pressure sensor is attached, wherein the distance between the pair of legs is greater than the width of the end timber retaining bracket, and the height of the pair of legs is greater than the height of the end timber retaining bracket, and is fastened and attached by a nut that is screwed onto the threaded rod via the washer so as to cover the end timber retaining bracket and not come into contact with the end timber retaining bracket with a gap between them.

4. A formwork structure in which the end timbers supporting the weir boards are held in place by end timber retaining brackets, A formwork structure characterized by loosening a nut that is screwed onto a threaded rod passing through the end timber retaining fitting and pressing the end timber retaining fitting against the end timber, thereby forming a formwork side pressure sensor mounting fitting according to any one of claims 1 to 3; passing the threaded rod and nut through the oversized through hole of the sensor mounting base fitting to which the side pressure sensor is attached; inserting a washer constituting the formwork side pressure sensor mounting fitting between the sensor mounting base fitting and the nut, passing the threaded rod through the notch of the washer, and tightening the nut to attach the formwork side pressure sensor mounting fitting to which the side pressure sensor is attached.

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