JP5687406B2 - Top edge jig - Google Patents

Description

  The present invention relates to a top edge jig used for setting a top edge level which is an upper end of a concrete foundation when a concrete foundation of a building is placed.

When forming concrete foundations for homes, etc., concrete with poor fluidity is cast up to a certain height, and then a leveler with high cement ratio and high fluidity is poured up to the top level. It is formed on a flat surface with irregularities corrected. In that case, the height of the concrete and the height of the leveler are determined by using a top edge jig and a laser emitter. Conventionally, as this type of top end jig, for example, as shown in Patent Document 1, an adjustment screw body is screwed so as to be able to advance and retreat into a screw hole opened at an upper end portion of a long bar-shaped auxiliary tool body. An upper blade portion for leveling the concrete extending in a direction perpendicular to and horizontally with respect to the auxiliary tool body is fixed to the upper part of the main body, and around the lower part of the auxiliary tool body extending in a direction perpendicular to and perpendicular to the auxiliary tool body. 2. Description of the Related Art A top edge assisting device is known in which a lower blade portion is fixed to prevent stopping. The top end assisting device is inserted into the concrete in the vertical direction after placing the concrete, and the auxiliary tool body is vertically embedded up to the position of the upper blade. And after concrete hardens | cures, the adjustment screw body is further rotated, the top end level which is final height is adjusted, and a concrete foundation is formed by pouring a leveler to a top end level.
Japanese Patent No. 2649483

  By the way, in the case of the above-mentioned top end auxiliary device, the concrete is not sufficiently hardened because the auxiliary device is subjected to rotational force when turning the adjusting screw body and adjusting the top end level after being inserted into the concrete. The auxiliary device moves and its position becomes unstable. Therefore, when adjusting the top level with the adjusting screw body, the concrete needs to be hardened, but it takes time to harden the concrete, especially in winter when the temperature is low, the time to harden is very long. Become. As a result, there is a problem that work efficiency for adjusting the top end level is deteriorated and workability of concrete foundation formation is deteriorated.

On the other hand, for example, as shown in Patent Document 2, a single steel wire is bent and the upper end of the straight portion is folded downward to form the top end display portion, and the lower end portion is inserted into the vertical reinforcing bar. The insertion part is a shape in which the lower end of the straight line part is folded upward, folded downward, folded upward again, and the end part is directed upward, and each folded part is semicircular. The top end display material in which the lower loop body is continuously formed on both sides of the upper loop body is shown. This top end display material has an opening at the bottom end with the lower loop body facing each other, and it can be easily attached to the vertical streak with one touch by inserting it into the vertical rebar from this opening. There is an advantage that alignment is easy. In addition, this top end display material has a stop ring fitted to the straight part, and by surrounding the straight part and the vertical streak with the stop ring, the straight part is prevented from coming off from the vertical rebar on the lower end side due to receiving force. It is preventing.
JP-A-2005-48510

  However, in the above-mentioned top end display material, even if a stop ring is used, the strength of attachment to the vertical bars is not sufficient, and in order to secure the attachment strength, it is necessary to bind to the vertical bars with a wire. It was complicated. In addition, the top end display material has a problem that the processing cost becomes high because the bending process of the lower end portion is complicated, and as a result, the price of the member becomes high. Furthermore, when placing concrete while sandwiched between molds, the space between the narrow molds is dark when viewed from the outside. There is a problem that it becomes difficult. Moreover, since the top end display part is exposed on the concrete upper surface, there is a problem that rust is generated and the strength of the concrete is adversely affected. Furthermore, since the material of the top end display material is a different metal from the vertical bars, there is also a problem that the vertical bars are easily corroded by contact between the two. In addition, since the leveler shrinks greatly due to drying, the leveler surface is recessed after the leveler is dried, and the head of the top end display material slightly protrudes. The display material has a problem that the top level cannot be readjusted after the concrete is hardened, and the protrusion from the leveler surface cannot be corrected.

For example, as shown in Patent Document 3, the level setting bar serving as a mark for the top end level, and the pair of holding portions and the level setting bar for clamping the reinforcing bars from both sides to be fixed are adjusted. There is known a top end level management tool that includes a fixing member having a holding portion that can be held, and the holding portion includes an adjustment portion that can adjust each latching position. This top end level management tool is adjusted and fixed to a desired position of the reinforcing bar by the holding portion. Thereafter, the laser light emitter is used to aim at the top level of the top of the top level management tool, and the level adjustment is performed by rotating the enlarged diameter portion of the level setting bar. The concrete is cast up to the expanded portion, and a leveler is poured onto the top of the top level control tool to correct the unevenness of the concrete.
JP-A-2005-48510

  By the way, in the case of the above-mentioned top end level management tool, the level adjustment is performed by rotating the diameter-expanded portion of the level setting bar, and the adjustment is troublesome. Also, since the reinforcing bars placed on the ground are not completely fixed, there is a possibility of moving up, down, left and right when placing concrete, and the unevenness of the concrete may increase, or the concrete may be inclined. is there. In this case, since the top level set by the top level control tool also fluctuates, it is necessary to readjust the final top level after placing concrete. However, this top end level management tool cannot cope with such a problem because the groove portion of the level setting bar bites into the protrusion of the holding portion and the top end level cannot be readjusted. Moreover, since the structure of a clamping part is complicated, there exists a problem that attachment to a reinforcing bar is not easy between narrow foundation forms, and a price becomes expensive.

  The present invention is intended to solve the above-described problems, and provides a top end jig that can easily perform precise adjustment of the final top end level within a short period after placing concrete. The purpose is to do.

In order to achieve the above object, the structural features of the present invention are as follows: a resin-made cylindrical holding portion having an axial hole and an outer wall of the cylindrical holding portion which are integrated in parallel or perpendicular to the axial direction. A resin reinforcing bar mounting part that is detachably attached to a reinforcing bar disposed on the ground, and is inserted into the shaft hole of the cylindrical holding part in a press-fitted state and arranged in the vertical direction, and is cylindrically held. A long, thin, round rod made of metal that is slidably attached to the shaft and slidable with respect to the shaft hole by applying an external force , and has an outer diameter larger than the inner diameter of the shaft hole The rebar mounting part is cylindrical and separated at one place in the circumferential direction to be substantially C-shaped, and a locking means for releasably locking each other is provided on both separated side portions. The upper end of the concrete foundation of the building Are those Tentan level setting is performed, it is to be embedded in the concrete foundation by pouring concrete.

  In the invention configured as described above, the top end jig is attached to the reinforcing bar at the reinforcing bar attaching portion, the cylindrical holding portion is arranged in a vertical state, and is tightly fitted to the shaft hole of the cylindrical holding portion. The adjusting rod, which is tightened and attached, is aligned with the upper end position of the concrete placing while sliding by applying force in the vertical direction by hand. Thereafter, concrete is driven to a predetermined position of the adjusting rod. After the concrete is placed, the final top level of the concrete foundation can be precisely adjusted with the adjusting rod, and the leveler can be poured in accordance with the top level. At that time, since the top end jig is firmly fixed to the reinforcing bar by the reinforcing bar attaching portion and does not move, the top end height can be adjusted by the adjusting rod even before the concrete is hardened. As a result, in the present invention, the operation of the adjusting rod within a short period of time after the concrete placement against the positional displacement of the reinforcing bars up and down and left and right after the concrete placement and the fluctuation due to the unevenness and inclination of the concrete surface. Since the final top level can be determined quickly and appropriately, the workability of the concrete placing work is significantly improved.

  Further, according to the present invention, the height adjustment can be performed simply by moving the adjustment rod up and down by hand or the like, so that the adjustment effort is simple and the adjustment time can be shortened. Furthermore, in the present invention, since the height of the top end can be adjusted before the concrete foundation is cured, the leveler can be poured before curing, so that the adhesive strength between the concrete and the leveler is increased. As a result, it is not necessary to apply an adhesive to the concrete foundation, so that the concrete foundation placing operation is further simplified. In the present invention, since the adjusting rod is isolated from the reinforcing bar by the resin cylindrical holding part and the reinforcing bar attaching part, there is no possibility of corroding different kinds of metal reinforcing bars.

In addition, the reinforcing bar mounting portion is cylindrical and is separated at one place in the circumferential direction so as to be substantially C-shaped, and is provided with a locking means that releasably locks the separated side portions. As a result, the reinforcing bar mounting part is firmly fixed to the reinforcing bar by the locking means. As a result, even if a force is applied to the top edge jig when adjusting the height or when placing the concrete, The falling out of the end fitting jig is surely prevented.

  In the present invention, it is preferable that a resin cap portion having a flat upper surface is fitted to the upper end of the adjustment rod. Thereby, since the lower end of the cap part can be recognized as the concrete placement position and the upper end can be recognized as the final top end height, the concrete placement height can be accurately recognized. Further, since the upper surface of the cap portion is flat, a wooden bar for height adjustment can be stably placed, and the height adjustment work is easily and accurately performed. Furthermore, since the upper end of the adjusting rod can be prevented from being exposed to the upper surface of the concrete by the cap portion, adverse effects on the strength of the concrete due to the rusting of the adjusting rod can be prevented.

  Moreover, in this invention, it is preferable that the surface of the upper end side of an adjustment rod is made uneven. As a result, when the cap portion is fitted to the adjustment rod, the cap portion is bitten into the uneven surface, so that the cap portion is firmly attached to the adjustment rod and is prevented from falling off the adjustment rod. In addition, even if the leveler surface is dented and the upper part of the cap part slightly protrudes due to shrinkage after drying the leveler, the upper part of the cap part can be readjusted by making it slightly depressed by striking the upper part of the cap part. Can be easily adjusted to the leveler surface.

  Moreover, in this invention, it is preferable that a cap part is colored light gray. As a result, even if the top edge jig is placed in a dark space between narrow molds, the cap portion can be easily recognized from the outside because of the light gray, and the leveler placement can be placed on the top surface of the cap portion. This can be done accurately. Moreover, since the color of the cap part approximates that of the leveler, the cap part does not stand out on the surface after the leveler is placed, so that it does not give an uncomfortable feeling to the person who sees the concrete foundation.

  Moreover, in this invention, the collar part may be provided in the lower end side of the cap part. As a result, the flange on the lower end side of the cap portion can be clearly recognized as a mark of the concrete placement position, and the concrete placement can be performed even if the top edge jig is placed in a dark space between narrow molds. The height of can be accurately adjusted according to the buttocks.

  Further, in the present invention, the locking means includes a first protrusion protruding from the inner peripheral surface on the tip end side of the semicylindrical portion extending from the cylindrical holding portion to one side, and a semicylindrical shape extending to the other side. A first protrusion protruding at at least one position in the circumferential direction of the outer peripheral surface of the part and a second protrusion that releasably engage with each other may be provided. Thereby, the tip end side of the semi-cylindrical portion extending to one side and the semi-cylindrical portion extending to the other side are overlapped, and the first protrusion and the second protrusion are engaged with each other. As a result, it is possible to reliably prevent the top end jig from falling off the reinforcing bars.

  Further, in the present invention, the reinforcing bar mounting portion has a substantially semi-cylindrical shape extending from the cylindrical holding portion on both sides, and protrudes outwardly at the outer peripheral surface on the distal end side of the portion extending to one side. Bending at the tip of the first attachment piece provided with the second engagement protrusion provided with the mating protrusion and spaced apart in the circumferential direction and projecting outward from the outer peripheral surface, and the other side of the first attachment piece A first semi-cylindrical shape which is attached in a deformable manner, and is engaged with the first engagement protrusion and the second engagement protrusion individually and releasably locked on the inner peripheral surface on the distal end side; You may provide the 2nd attachment piece which provided the latching protrusion which comprises a latching means with a 2nd engagement protrusion.

  Thereby, when aligning the upper end position of the concrete placement using the adjusting rod attached to the cylindrical holding part, when attaching the reinforcing bar attaching part to the reinforcing bar having a small diameter, the first attaching piece is attached to the outer periphery of the reinforcing bar. And the reinforcing protrusion of the second mounting piece is locked to the second engaging protrusion of the first mounting piece, so that the reinforcing bar mounting portion is tightened by the first and second mounting pieces to be firmly attached to the reinforcing bar. Fixed. In addition, when attaching the reinforcing bar mounting portion to a reinforcing bar having a large diameter, the first mounting piece is widened and fitted together with the second mounting piece on the outer periphery of the reinforcing bar, and the locking protrusion of the second mounting piece is attached to the first mounting piece. By engaging the first engaging protrusion, the reinforcing bar attaching portion is firmly fixed to the reinforcing bar by being tightened by the first and second attaching pieces. As a result, in the present invention, two types of reinforcing bars having different thicknesses can be accommodated by a single reinforcing bar mounting portion, so that the price of the member is reduced and the labor of managing the member is reduced.

  In addition, according to the present invention, since the reinforcing bar mounting portion is fastened to the reinforcing bar by tightening with the second mounting piece, the adjusting rod can be moved up and down by hand even before the concrete is sufficiently cured. By moving it, the top level, which is the final height of the concrete foundation, can be adjusted precisely, and the leveler can be poured to match the height. As a result, in the present invention, with respect to the displacement of the reinforcing bars up and down, left and right after concrete placement, and fluctuations due to unevenness and inclination of the concrete surface, the final adjustment is performed by the adjusting rod within a short period after concrete placement. Therefore, the workability of concrete placing work can be improved. In the present invention, the reinforcing bar mounting portion can be easily attached to the reinforcing bar by locking the locking protrusion of the second mounting piece to the first engaging protrusion or the second engaging protrusion of the first mounting piece. Therefore, it is possible to easily attach the top edge jig to the reinforcing bar between the narrow foundation molds.

  In the present invention, since the top end jig is firmly fixed to the reinforcing bar by the reinforcing bar mounting part provided integrally with the cylindrical holding part or the reinforcing bar insertion hole of the reinforcing bar mounting part, the concrete is the cylindrical holding part. After the concrete rod is inserted to the specified position of the shaft hole, even before the concrete hardens sufficiently, the top level of the concrete foundation can be easily and easily adjusted by adjusting the adjustment rod in the vertical direction. It can be adjusted precisely. As a result, in the present invention, since the final top level can be precisely adjusted within a short period of time after the concrete is placed, the workability of the concrete placement work is improved and the work cost is reduced. It can be greatly reduced. Further, in the present invention, since the top edge jig can be easily attached to the reinforcing bar at the reinforcing bar attaching portion, the ceiling edge jig can be easily attached to the reinforcing bar between narrow foundation molds. . Furthermore, in the present invention, since the leveler can be poured before the concrete foundation is hardened, and the adhesive strength between the concrete and the leveler is increased, there is no need to apply an adhesive to the concrete foundation. Is further simplified. Also, in the present invention, even if the head of the top level control tool slightly protrudes from the leveler surface after the leveler is dried, the head of the cap part can be lowered, so that the leveler surface can be made flat easily. Can do.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway front view showing a top edge jig used for positioning an upper end of a fabric foundation portion of a foundation concrete for a house which is Example 1. FIG. 2 is a front view of the adjusting rod, FIGS. 3 and 4 are front and plan views of the mounting main body, and FIGS. 5A, 5B, and 5C are cross-sectional views, plan views, and bottom views of the cap portion at the axial position. FIG. 6, FIG. 7, and FIG. 8 show the usage state of the top edge jig with a front view, a plan view, and an explanatory view. The top end jig 10 includes a small-diameter cylindrical holding portion 12 having a shaft hole 13 and a substantially C-shaped reinforcing bar attached integrally on the outer wall of the cylindrical holding portion 12 in parallel to the axial direction. The resin-made mounting main body 11 comprising the portion 15 and the shaft hole 13 are inserted in the vertical direction and are tightened and attached to the cylindrical holding portion 12. A long adjustment rod 24 that is slidable and a cap portion 26 that covers the upper end of the adjustment rod 24 are provided.

  The cylindrical holding portion 12 has a small diameter cylindrical shape, an axial length shorter than the reinforcing bar mounting portion 15, and a shaft hole 13 having a substantially cross-shaped axial cross section penetrating between both end surfaces at the axial center position. And are integrally attached to an intermediate position in the axial direction of the reinforcing bar attachment portion 15 in parallel with each other. The reinforcing bar attachment part 15 is a thin, semi-cylindrical first attachment piece 16 that extends from the cylindrical holding part 12 to both sides, and is formed on the other side of the first attachment piece 16 (rear side in FIG. 1). And a semi-cylindrical second attachment piece 21 that is integrally attached to the tip of the portion 16b extending through the thin-wall connecting portion 19 so as to be able to bend and deform.

  The first mounting piece 16 has a semi-cylindrical shape with a substantially 1/4 circumference portion of the cylindrical shape removed, and is formed so that the inner diameter is slightly smaller than the outer diameter of the thin reinforcing bar 5 (for example, 10 mmφ). The outer peripheral surface of the portion 16a that extends to one side (the front side in FIG. 1) with respect to the cylindrical holding portion 12 protrudes outward on the distal end side and extends between both axial ends. A joint protrusion 17 is provided, and a second engagement protrusion 18 that protrudes outward at a position near the cylindrical holding portion 12 and extends between both ends in the axial direction is provided. Each of the first and second engaging protrusions 17 and 18 has two protrusions extending in the axial direction continuous in the circumferential direction, and each protrusion is inclined toward the cylindrical holding portion 12 when viewed from the plane. The protruding end is a sawtooth with a sharp angle. Since each of the first and second engaging protrusions 17 and 18 has two protrusions, when the locking protrusion 22 to be described later is locked to the first and second engaging protrusions 17 and 18, it is fitted. Even if there is some variation in the diameter of the reinforcing bars to be combined, it is attached in a state of being tightly tightened to the reinforcing bars by selecting and locking one of the projections according to the variation. The number of these protrusions is not limited to two, and may be one or three or more as necessary.

  A semi-cylindrical second attachment piece 21 is attached to the tip of a portion 16b extending to the other side of the first attachment piece 16 via a thin connecting portion 19 so as to be able to bend and deform. The second mounting piece 21 has a semi-cylindrical shape in which a substantially 1/2 circumferential portion of the cylindrical shape is removed, and is formed so that the inner diameter is slightly smaller than the outer diameter of the thick reinforcing bar F2 (for example, 13 mmφ). In the inner peripheral portion of the tip, there is provided a locking projection 22 that protrudes slightly inward and extends in the axial direction. The locking projection 22 is a single projection, and the shape of the projection is the same as the first and second engagement projections 17 and 18, and a protruding end inclined toward the cylindrical holding portion 12 when viewed from the plane. Has a serrated shape with a sharp angle. The locking protrusion 22 can be locked with the first and second engaging protrusions 17 and 18. The number of protrusions is not limited to one. The attachment main body portion 11 in which the cylindrical holding portion 12 and the reinforcing bar attachment portion 15 are integrated is integrally formed by resin injection molding.

  The adjusting rod 24 is a long thin round bar made of metal, and a thread groove 24a is formed on the tip side thereof to make the surface uneven. The adjustment rod 24 has a diameter slightly larger than the inner diameter of the shaft hole 13 of the cylindrical holding portion 12, is inserted into the shaft hole 13 in a press-fit state, and is held in the shaft hole 13 in a tight state. At the same time, it can slide with respect to the shaft hole 13 by applying a force in the axial direction. A cap portion 26 made of resin and colored in light gray is fitted into the thread groove 24a portion of the adjusting rod 24. As shown in FIG. 5, the cap portion 26 has a cylindrical shape whose upper end side is sealed, and a cross-shaped mounting groove 27 is provided at the center of the upper end surface 26a, and the outer peripheral surface is substantially in the axial direction. It has a conical surface 26b that is inclined while reducing its diameter from the bottom to the bottom, and is provided with a mounting hole 28 that opens coaxially in the same manner as the bottom and extends to the vicinity of the top. The mounting hole 28 has an inner diameter smaller than the outer diameter of the adjusting rod 24. As a result, the adjustment rod 24 is inserted into the mounting hole 28 of the cap portion 26 at the thread groove 24a at the tip. Thereby, the cap part 26 meshes with the screw groove 24a of the adjusting rod 24 and is firmly fixed to the upper end. The cap portion 26 has a flat upper end surface 26a, and a bar for raising the top end level is erected thereon, and the height is adjusted by a laser light emitter so that the concrete placement position and the top end level are adjusted. It is what decides.

  In the first embodiment, when attaching the reinforcing bar attachment portion 15 of the top edge jig 10 to the vertical reinforcing bar F1 having a thin outer diameter, as shown in FIGS. 6 and 7, the first mounting piece 16 is arranged on the outer periphery of the vertical reinforcing bar F1. The reinforcing bar mounting portion 15 is locked to the first and second mounting pieces 16 and 21 by engaging the locking projections 22 of the second mounting piece 21 with the second engaging projections 18 of the first mounting piece 16. It is firmly fixed to the reinforcing bar F1 in a state of being tightened with (Use state I). In addition, by locking the locking projection 22 of the second mounting piece 21 to the second engaging projection 18 of the first mounting piece 16, the reinforcing bar mounting portion 15 can be easily mounted on the vertical reinforcing bar F1, so that it is narrow. The top edge jig 10 is easily attached to the vertical reinforcing bar F1 between the basic molds. When the top end jig 10 is attached to the vertical reinforcing bar F1 by the reinforcing bar attaching part 15, the cylindrical holding part 12 is arranged in a vertical state.

  Next, as shown in FIG. 8, a wooden bar is placed on the upper end of the adjusting rod 24 that is tightly tightened and attached to the shaft hole 13 of the cylindrical holding portion 12, and the adjusting rod 24 is moved by hand or the like. While sliding, align with the top position of the concrete placement using a laser emitter or the like. Thereafter, the concrete is driven to the lower end position of the cap portion 26 of the adjusting rod 24. After the concrete K1 is placed, the final top level of the concrete foundation can be precisely adjusted by the adjusting rod 24, and the leveler K2 can be poured in accordance with the top level. Here, since the top end projection jig 10 is firmly fixed to the vertical reinforcing bar F1 at the reinforcing bar attachment portion 15 and does not move, the top end height adjustment by the adjusting rod 24 is performed even before the concrete is sufficiently cured. Can do. As a result, in Example 1, the adjustment rod 24 within a short period of time after the concrete placement against the displacement of the reinforcing bars after concrete placement in the vertical and horizontal directions and the fluctuation due to the unevenness and inclination of the concrete surface. Since the final top level can be determined quickly and appropriately, the workability of the concrete placing work is improved.

  Further, according to the first embodiment, the height adjustment can be performed by simply holding the adjustment rod 24 by hand or hitting it with a hammer or the like without using a jig such as a screwdriver. Adjustment work is easy and adjustment time can be shortened. Furthermore, in Example 1, since the height of the top end can be adjusted before the concrete is hardened, the leveler can be poured before the hardened, so that the adhesive strength between the concrete and the leveler is increased. As a result, it is not necessary to apply an adhesive to the concrete foundation, so that the concrete foundation placing operation is further simplified. Moreover, in Example 1, since the metal adjustment rod 24 is isolated from the vertical rebar F1 by the resin mounting main body 11, there is no possibility that the vertical rebar F1 is corroded due to contact between different metals.

  In the first embodiment, the cap portion 26 is fitted to the upper end of the adjusting rod 24, so that the lower end of the cap portion 26 is used as a reference position for placing concrete and the upper end is the final top end of the concrete. It can be easily recognized as a level. Moreover, since the upper surface 26a of the cap part 26 is flat, the laser measuring tool for height adjustment and the wooden stick can be stably placed, and the height adjustment work is easily performed. Furthermore, since the cap portion 26 can prevent the upper end of the adjusting rod 24 from being exposed on the upper surface of the concrete, adverse effects on the strength of the concrete K1, K2 due to rusting of the adjusting rod 24 can be prevented. In addition, since the surface of the upper end side of the adjustment rod 24 is made uneven by the screw groove 24a, the cap portion 26 is firmly tightened because it bites into the screw groove 24a when the cap portion 26 is fitted to the adjustment rod 24. It is attached to the adjustment rod 24 and is prevented from falling off from the adjustment rod 24.

  Further, even if the leveler surface is dented and the upper part of the cap part 26 protrudes slightly due to shrinkage after drying the leveler, the cap part 26 can be dented and readjusted by slightly hitting the upper surface side of the cap part 26. 26 The upper surface can be easily adjusted to the leveler surface. In the first embodiment, since the cap portion 26 is colored light gray, the cap portion 26 is light gray even when the top edge jig 10 is arranged in a dark space between narrow molds. For this reason, it can be easily recognized from the outside, and leveler placement can be accurately performed in accordance with the upper surface of the cap portion 26.

  Further, when the reinforcing bar attachment portion 15 is attached to the thick reinforcing bar F2 (for example, the outer diameter is 13 mmφ), as shown in FIGS. 9 and 10, the first attachment piece 16 is expanded and the second attachment piece 21 together with the reinforcing bar 6. The rebar attachment portion 15 is engaged with the first and second attachment pieces 16 by engaging the engagement protrusions 22 of the second attachment pieces 21 with the first engagement protrusions 17 of the first attachment pieces 16. , 21 and is firmly fixed to the rebar F2 having a large outer diameter (use state II). As a result, in Example 1, since it can fix to two types of reinforcing bars F1 and F2 with different thicknesses by the top edge projection jig 10 having a single reinforcing bar mounting part 15, the reinforcing bar mounting part 15 is included. The price of the mounting main body 11 is reduced, and the labor of member management is reduced.

  Next, another example of use of the top edge jig 10 according to the first embodiment will be described. As another example of use, the top edge jig 10 is used to determine the height of the base portion that is directly laid on the ground surface of the residential concrete foundation. As shown in FIG. 11, the top edge jig 10 is formed by the reinforcing bar attachment portion 15 at a position near the lower end of the vertical reinforcing bar F1 attached in the vertical direction to the horizontal reinforcing bar F3 arranged in the horizontal state near the ground. The lower end of the adjustment rod 24 is adjusted to the placement position of the base concrete K3 by being fixed and extending the adjustment rod 24 downward from the lower end of the cylindrical holding portion 12. Thereby, the height of the base concrete K3 is accurately aligned. Furthermore, after using for such height adjustment, the top end jig 10 is used to adjust the top end of the above-mentioned concrete cloth foundation by removing the top end jig 10 from the vertical reinforcing bar F1. be able to. As a result, since the top edge jig 10 can be used for two purposes, the value of the top edge jig 10 is further increased.

Next, a first modification of the first embodiment will be described.
In the first modification, in the top edge jig 10 of the first embodiment, the cylindrical holding portion 12 and the reinforcing bar attaching member 15 are integrated with each other in the axial direction, whereas in FIGS. As shown, the cylindrical holding part 12 and the reinforcing bar attaching part 15 are attached so that their axial directions are orthogonal to each other. Accordingly, the top end jig 10A is attached to a horizontal reinforcing bar (not shown) arranged horizontally by the reinforcing bar attaching part 15 with the cylindrical holding part 12 oriented in the vertical direction. . As a result, also in the modified example, the same effect as in the first embodiment can be obtained for the horizontal reinforcing bars.

Next, a second modification of the first embodiment will be described.
In the modified example 2, instead of the reinforcing bar attachment portion 15 of the top end jig 10 of the first embodiment that can be fixed to the reinforcing bars of two types of diameters, the reinforcing bar that is applied only to the reinforcing bars of one type of diameter. An attachment portion 31 is provided. As shown in FIGS. 14 and 15, the reinforcing bar attachment portion 31 is provided with a thin and substantially cylindrical attachment piece 32, and a cylindrical holding portion arranged in the axial direction at the center in the circumferential direction of the attachment piece 32. 12 is integrated. The attachment piece 32 is separated at one place in the circumferential direction, and has an inner diameter that fits into a reinforcing bar having a predetermined diameter. The attachment piece 32 is provided with a first engagement projection 33 that protrudes at one end edge and extends between both ends in the axial direction on the outer peripheral surface of a portion 32a extending to one side across the cylindrical holding portion 12. On the inner peripheral surface of the portion 32b extending in the other direction, a second engagement protrusion 34 protruding at the other end edge and extending between both ends in the axial direction is provided and is released from the first engagement protrusion 33. It is designed to lock together.

  In the second modification, for one type of vertical reinforcing bar having a predetermined diameter, the reinforcing bar attaching portion 31 is fitted to the reinforcing bar by extending the attachment pieces 32 extending on both sides, and the second engaging protrusion 34 is connected to the first engaging bar. By engaging the mating protrusion 33, the reinforcing bar attaching portion 31 is attached in a state of being firmly tightened to the vertical reinforcing bar. Thereby, also in the modified example 2, as in the first embodiment, the reinforcing bar attaching portion 31 is easily attached to the vertical reinforcing bars in a short time, and the top edge jig 10 is used in the reinforcing bar attaching portion 15. Since it is firmly fixed to the vertical reinforcing bar F1 and does not move, an effect such that the top end height can be adjusted by the adjusting rod 24 even before the concrete is sufficiently hardened is obtained.

Next, reference examples will be described with reference to the drawings.
FIGS. 16 and 17 show a top edge jig 40 as a reference example in a partially broken front view and bottom view. The top end jig 40 has a small-diameter cylindrical holding portion 12 having a shaft hole 13 and a round bar-shaped reinforcing bar attachment portion 42 provided integrally on the outer wall of the cylindrical holding portion 12 in parallel to the axial direction. A resin-made mounting main body 41, a long adjusting rod 24 that is inserted through the shaft hole 13 and arranged in the vertical direction, and a cap portion 26 that covers the upper end of the adjusting rod 24. ing. In addition, about the cylindrical holding | maintenance part 12, the adjustment rod 24, and the cap part 26, it is the same as that of the said Example 1, and uses the same code | symbol.

  The reinforcing bar attachment portion 42 is provided with a reinforcing bar insertion hole 43 that extends coaxially from the axially intermediate position to the lower end 42a and opens at the lower end. The reinforcing bar insertion hole 43 has a conical surface shape that is inclined so as to be reduced in diameter from the lower end 42a toward the intermediate position in the axial direction. The outer diameter at the lower end position 42a is larger than the inner diameter at the hole inner end position 43a. It is getting bigger. For example, when the vertical rebars F1 and F2 having outer diameters of 10 mm and 13 mm are targeted, the outer diameter at the lower end position 42a is 14 mm and the outer diameter at the inner end position 43a is 9 mm.

  Next, the operation of the reference example will be described. As shown in FIG. 18, the top end fitting jig 40 is arranged with one end of the reinforcing bar attaching portion 42 facing up, and is placed between the molds at the reinforcing bar insertion hole 43 on the other end side of the reinforcing bar attaching portion 42. Is inserted from the upper end of the vertically-reduced vertical reinforcing bar F1 extending in the vertical direction and fitted into the vicinity of the upper end of the reinforcing bar F1 by the inclined surface of the reinforcing bar insertion hole 43 (use state 1). . In this state, the lower end of the cap part 26 is aligned with the upper end position of the concrete placement by moving the adjustment bar 24 up and down to adjust the height. Thereafter, the concrete is driven up to the lower end position of the cylindrical holding portion 12, but the top end jig 40 is firmly fixed to the vertical reinforcing bar F1 and does not move, so that the concrete is sufficiently formed even before the concrete is sufficiently cured. The top level, which is the final height of the concrete foundation, can be precisely adjusted by the adjusting rod 24 inserted into the shaft hole 13 of the holding portion 12, and the leveler can be poured according to the height. As a result, even in the reference example, the adjustment rod 24 is used to adjust the position of the reinforcing bars after the concrete placement within a short period after the concrete placement, with respect to the positional deviation of the reinforcing bars up and down, left and right after the concrete placement, and fluctuations due to unevenness and inclination of the concrete surface. Therefore, the same effect as in the first embodiment can be obtained, for example, the workability of concrete placing work can be improved.

  Moreover, since the reinforcing bar attachment part 42 is provided with the reinforcing bar insertion hole 43 inclined so as to increase in diameter from the axial intermediate position toward the lower end, the reinforcing bar insertion hole 43 is suitable for the difference in the diameter of the reinforcing bar. By inserting and fitting to the inner diameter position, it can be firmly attached to reinforcing bars having different diameters. For example, when the vertical reinforcing bar F2 having a large outer diameter is a target, the upper end of the reinforcing bar F2 is locked at a substantially intermediate position in the axial direction within the reinforcing bar insertion hole 43 of the reinforcing bar mounting portion 42 as shown in FIG. It is firmly attached (use state 2). As a result, in the reference example, it is possible to firmly attach the reinforcing bars with different diameters to the reinforcing bars having different diameters by using the reinforcing bar insertion holes 43 only by preparing one type of top edge jig 40, so that the installation work is simplified. In addition, the labor of managing the top edge jig is saved, and the price is relatively low.

Next, a modification of the reference example will be described.
In the modified example, the mounting body portion 41A of the top end jig is provided with a reinforcing bar insertion hole 43 on the lower end side of the reinforcing bar mounting portion 42 in the mounting body portion 41 of the reference example, as shown in FIGS. In addition, the lower side portion is provided with slits 45 extending in the axial direction at four equally spaced intervals in the circumferential direction, and the lower side portion is arranged separately into four engagement pieces 46. Thereby, in a modification, when inserting attachment main-body part 41A from the upper end side of the reinforcing bars F1 and F2 in a lower end side, it is radially outward by elastic deformation of the engagement piece 46 separated by the slit 45. Since it is in the expanded state, the top end fitting jig 40 is smoothly inserted into the reinforcing bars F1 and F2. In addition, after the top end jig 40 is inserted into the reinforcing bars F1 and F2, the elastic reaction force of the engagement piece 46 acts as a strong tightening force directed radially inward with respect to the reinforcing bars F1 and F2. . Therefore, the reinforcing bar attaching portion 42 is firmly fixed to the reinforcing bars F1 and F2 so as not to move even when the height is adjusted by the adjusting rod 24 or when the concrete is placed.

  In the reference example, similarly to the first modification of the first embodiment, in order to attach to the horizontal reinforcing bar, the reinforcing bar attaching portion 42 can be attached to the cylindrical holding portion 12 so as to be orthogonal to the axial direction. . Further, in the first embodiment and the reference example, as shown in FIG. 22, the cap portion 26A is provided with an annular flange portion 29 extending in a direction perpendicular to the axis at the cylindrical lower end where the mounting hole 28 opens. Can be. Thereby, the collar part 29 of a lower end can be recognized clearly as a mark of a concrete placement position. As a result, even when the top edge placing jig is disposed in a dark space between narrow molds, the concrete placement height can be accurately adjusted in accordance with the flange portion 29. In addition, in the said Example 1 and a modification, about the shape of a cylindrical holding | maintenance part and a reinforcing bar attachment part, it is possible to set it as various shapes not only in a column shape and a prism shape. In addition, the top edge jig shown in each of the above embodiments is merely an example, and various modifications can be made without departing from the spirit of the present invention.

  Since the top edge jig of the present invention is firmly fixed to the reinforcing bar by the reinforcing bar mounting part provided integrally with the cylindrical holding part or the reinforcing bar insertion hole of the reinforcing bar mounting part, the concrete is driven to the specified position. Even after the concrete has hardened sufficiently, the top level of the concrete foundation can be adjusted easily and precisely by adjusting the adjustment bar in the vertical direction. This is useful because the operation cost can be greatly reduced and the operation cost can be greatly reduced.

It is sectional drawing in the axis line position which shows the top edge extraction jig | tool which is Example 1 of this invention. It is a front view which shows the adjustment stick | rod of the same top end jig | tool. It is a front view which shows the attachment main-body part of a top edge extraction jig | tool. It is a top view which shows the attachment main-body part of a top edge extraction jig | tool. It is sectional drawing in the axis line position which shows a cap part. It is a top view which shows a cap part. It is a bottom view which shows a cap part. It is a front view which shows the use condition I of a top edge extraction jig | tool. It is a partially broken top view of the VII-VII line direction of FIG. 6 which shows the use condition I of a top edge extraction jig | tool. It is explanatory drawing explaining the top end position adjustment of the concrete using a top end extraction jig | tool. It is a front view which shows the use condition II of a top edge extraction jig | tool. FIG. 10 is a partially cutaway plan view in the direction of the line IX-IX in FIG. 9 showing a use state II of the top edge jig. It is explanatory drawing explaining the other example of the top end position adjustment of the concrete using a top end protrusion jig | tool. It is a front view which shows the attachment main-body part of the top edge extraction jig | tool which is the modification 1 of Example 1. FIG. It is a top view which shows the attachment main-body part of the top edge extraction jig | tool which is the modification 1. FIG. It is a front view which shows the attachment main-body part of the top edge extraction jig | tool which is the modification 2. FIG. It is a top view which shows the attachment main-body part of the top edge extraction jig | tool which is the modification 2. FIG. It is a partially broken front view which shows the top edge extraction jig | tool which is a reference example. It is a top view which shows the top edge extraction jig | tool which is a reference example. It is a partially broken front view which shows the use condition 1 of the same top end jig | tool. It is a partially broken front view which shows the use condition 2 of the same top end jig | tool. It is a partially broken front view which shows the attachment main-body part of the top edge extraction jig | tool which is a modification of a reference example. It is a top view which shows the attachment main-body part of the top edge extraction jig | tool which is the modification. It is a partially broken front view which shows the modification of a cap part.

DESCRIPTION OF SYMBOLS 10,10A ... Top edge extension jig | tool, 11 ... Attachment main-body part, 12 ... Cylindrical holding part, 13 ... Shaft hole, 15 ... Rebar attachment part, 16 ... 1st attachment piece, 17 ... 1st engagement protrusion, 18 ... 2nd engagement protrusion, 19 ... Thin connection part, 21 ... 2nd attachment piece, 22 ... Locking protrusion, 24 ... Adjustment rod, 26 ... Cap part, 28 ... Attachment hole, 31 ... Rebar attachment part, 40 ... Top End jig, 41, 41A ... mounting main body, 42 ... rebar mounting portion, 43 ... rebar insertion hole, 45 ... slit, 46 ... engagement piece, F1, F2 ... vertical rebar.

Claims (7)

A cylindrical holder made of resin having a shaft hole;
A resin reinforcing bar mounting part that is integrally provided in parallel or perpendicular to the axial direction on the outer wall of the cylindrical holding part, and is detachably attached to a reinforcing bar disposed on the ground;
It is inserted into the shaft hole of the cylindrical holding portion in a press-fitted state and arranged in the vertical direction, and is tightly tightened and attached to the cylindrical holding portion, and an external force is applied to the shaft hole. A long, thin, round rod made of metal that is slidable and an adjustment rod having an outer diameter larger than the inner diameter of the shaft hole ;
The reinforcing bar mounting portion is cylindrical and separated at one place in the circumferential direction, is substantially C-shaped, and is provided with a locking means that releasably locks to both separated side portions,
By adjusting the position of the upper end of the adjustment rod, the top end level, which is the upper end of the concrete foundation of the building, is set , and the ceiling end is embedded in the concrete foundation by placing concrete. jig.   2. The top end fitting jig according to claim 1, wherein a resin cap portion having a flat upper surface is fitted to an upper end of the adjustment rod.   3. The top end jig according to claim 2, wherein a surface on an upper end side of the adjusting rod is formed in an uneven shape.   4. The top edge projection jig according to claim 2, wherein the cap portion is colored light gray.   5. The top edge extending jig according to claim 2, wherein a flange portion is provided on a lower end side of the cap portion.   The locking means includes a first protrusion protruding from the inner peripheral surface on the distal end side of the semicylindrical portion extending to the one side from the cylindrical holding portion, and an outer peripheral surface of the semicylindrical portion extending to the other side. 6. The method according to claim 1, further comprising: a first protrusion protruding at least in one circumferential direction of the first protrusion and a second protrusion that releasably engages the first protrusion. The top edge jig shown.   The reinforcing bar mounting portion has a substantially semi-cylindrical shape extending from the cylindrical holding portion to both sides, and a first engagement protrusion protruding outward at an outer peripheral surface on a distal end side of a portion extending to one side is provided. And a first mounting piece provided with a second engaging projection that is spaced apart in the circumferential direction and protrudes outward from the outer peripheral surface, and is attached so that it can be bent and deformed at the tip of the portion extending to the other side of the first mounting piece. A first semi-cylindrical shape, and the first engagement protrusion and the second engagement that are individually releasably engaged with the first engagement protrusion and the second engagement protrusion on the inner peripheral surface on the distal end side. 6. The top edge projecting jig according to claim 1, further comprising a second mounting piece provided with a locking protrusion that constitutes the locking means together with a mating protrusion.

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