JP2018035639A - Height adjuster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a height adjusting tool capable of easily and accurately adjusting the top end position of a foundation concrete and the position of an anchor bolt. SOLUTION: A height adjusting tool 10 is inserted into a base portion 11 having a central hole 12 which is a long square columnar and penetrates in the longitudinal direction, and is rotatably and movably inserted into the central hole 12. It has a shaft portion 16 extending from both ends of the above, the operation portion 19 is fixed to one end side, and the driver portion 18 is provided on the other end side. A scale scale 14 continuing in the longitudinal direction is formed on the outer surface of the base portion 11, and a positioning portion 24 is provided which is fitted on the outer surface of the base portion 11 so as to be slidable in the longitudinal direction and can be fixed at an arbitrary position. .. [Selection diagram] Fig. 1

Description

  The present invention relates to a height adjuster used for adjusting the height of the top end position of a foundation concrete for a house, the upper end position of an anchor bolt, and the like.

  Conventionally, as this kind of height adjuster, as shown in Patent Document 1, a hollow outer casing having a rectangular cross section and a round bar-shaped core shaft that is rotatably held in the outer casing are provided. With positioning unit, engaging portion of the driver tip portion provided at the lower end of the core shaft, operation disk provided at the upper end, and a light receiver linked to a level detector slidably mounted on the outside of the enclosure A positioning tool having a cursor is disclosed. For example, when determining the height of the top edge which is the height of the foundation concrete with this positioning tool, the cursor position first becomes a reference height, for example, a position of a predetermined height from the base which is the height of the tension. Are fit together. Using this reference height as a reference, a position corresponding to the top edge height is measured, and the positioning body is marked with a pen or the like, and the cursor position is aligned with this mark.

  For example, a top end jig 50 as shown in FIG. 10 is used for the top end height adjustment. The top edge extending jig 50 is fixed in a vertical state by a reinforcing bar mounting portion 56 on the upper end side of the vertical reinforcing bars arranged between a pair of formwork rows arranged opposite to each other at the foundation concrete placement site. Is done. The adjusting portion 53 is moved up and down by fitting and rotating the positioning portion of the positioning tool positioned above the top end of the top end jig 50, and the height is adjusted by the laser surveying instrument until the light receiving portion position is reached. Thus, the top position is determined.

  Furthermore, between the pair of formwork rows, for example, a plate-like anchor bolt support member that is fixed to both upper ends across the formwork is provided, and the height of the anchor bolt is adjusted in the center mounting hole. It is inserted vertically in a state and is suspended by screwing. When adjusting the height of the anchor bolt, a predetermined height position is measured, a mark is placed on the positioning body with a pen or the like, and the cursor position is aligned with this mark. Connect the positioning tool to the upper end of the anchor bolt so that it is straight and hold it by hand. The height of the light receiving unit attached to the positioning tool is adjusted by irradiating the laser beam from the laser surveying instrument. Is called. After the height adjustment, while holding the positioned anchor bolt by hand, only the positioning tool is removed and placed sideways, and the anchor bolt is tightened with a screw and suspended from the anchor bolt support member.

  However, for the above positioning tool, it is necessary to measure the height of the top end and the anchor bolt position with a ruler in advance, mark the position with a magic, etc., and align the cursor with the mark. It was troublesome. In addition, although the top end position and the upper end height of the anchor bolt are usually in a constant relationship, a wasteful work is required in which the heights of both must be determined separately by a positioning tool.

JP-A-7-189489

  An object of the present invention is to provide a height adjuster that can easily and accurately adjust the top end position of a foundation concrete, the position of an anchor bolt, and the like.

  In order to achieve the above object, the structural features of the present invention include a base portion having a central hole penetrating in the longitudinal direction in a rod shape, and being inserted into the center hole so as to be rotatable and axially immovable from both ends of the base portion. In a height adjuster that extends, has an operating portion fixed on one end side, and a shaft portion provided with a driver portion on the other end side, a scale scale extending in the longitudinal direction is formed on the outer surface of the base portion. Is provided with a positioning portion which is externally fitted to be slidable in the longitudinal direction and can be fixed at an arbitrary position.

  In the invention configured as described above, the positioning portion is matched with the tension height, etc., which becomes a reference in advance at the foundation concrete forming site, and the base portion is determined with respect to a specified top height determined with respect to the reference height. On the other hand, the positioning part is moved and aligned while observing the scale scale. In this state, align the tip of the driver part with the top screw hole of the top edge fitting jig attached to the reinforcing bar between the molds, hold the base part by hand, and rotate the operation part to It can be used to match the specified height position of the height adjuster, and the top height is determined. As a result, in the present invention, the height of the top end can be determined easily and accurately while looking at the scale scale, so that the operation is simplified. The height adjustment of the anchor bolt is similarly performed.

  Further, in the present invention, a resin rod-shaped main body, an upper insertion hole for inserting a driver portion extending in the longitudinal direction on one end side of the rod-shaped main body, and a plurality of surroundings surrounding the upper insertion hole A displacement part made of a plurality of mounting pieces separated by slits extending in the longitudinal direction at the shaft and elastically deformable in the axial direction, and a cylindrical shape fitted to the outer peripheral side of the displacement part and tightening the displacement part from the outer peripheral side And a lower insertion hole into which the tip of a top end jig for determining the top end position of the concrete extending in the longitudinal direction on the other end side of the rod-shaped main body can be inserted, and a lower insertion hole A pair of clamping pieces which are fitted between a pair of blade portions provided in the vicinity of the tip of the top end extending jig extending in the longitudinal direction of the rod-shaped main body on both sides of the rod-shaped body and can be locked to the blade portions It is placed on the outer peripheral surface of the other end of the rod-shaped body, and anchor bolts are adsorbed at the end and suspended Provided and possible magnet unit height adjustment aid is preferably being detachably secured to the driver unit at one end.

  According to the present invention, the front end side of the driver portion is inserted into the upper insertion hole, and the displacement portion is tightened by the fastening member from the outside of the displacement portion, so that the driver portion is moved at the displacement portion of the height adjustment assisting tool. It can be easily and firmly fixed, and the removal of the height adjustment auxiliary tool from the height adjustment tool is also simplified. As a result, the top end of the top end jig can be inserted into the lower insertion hole and the front end blade can be sandwiched between the clamping pieces. By rotating the height adjuster, the top end height can be easily adjusted. I can decide. Moreover, an anchor bolt can be suspended by a magnet part by making the magnet part adsorb | suck one end of an anchor bolt. Therefore, by using the height adjustment mechanism by the height adjustment tool, the top height adjustment and the anchor bolt height adjustment by the height adjustment auxiliary tool can be easily performed.

  In the present invention, it is preferable that the projecting surface of the magnet portion is a flat surface perpendicular to the longitudinal direction of the rod-shaped main body, and the flat surface is flush with the bottom surface of the lower insertion hole. As a result, the height of the flat surface of the magnet matches the height of the top when the height of the top is determined. It is possible to determine the anchor bolt easily and accurately by suspending the anchor bolt on the magnet portion and then moving the positioning portion while viewing.

In the present invention, it is possible to easily align the position by moving the positioning part while looking at the scale scale with respect to the base part. Therefore, work such as height adjustment of the top end of the foundation concrete and height adjustment of the anchor bolt is performed. Can be performed more easily and accurately than in the past.

It is a partially broken front view which shows the height adjustment tool which is one Example of this invention. It is a right view which shows a height adjustment tool. It is an enlarged plan view which expands and shows a height adjustment tool. It is an enlarged bottom view which expands and shows a height adjustment tool. It is a partially broken sectional view explaining a part of the state which attached the height adjustment auxiliary tool to the height adjustment tool. It is a partially broken front view which shows the height adjustment auxiliary tool used for a height adjustment tool. It is a right view which shows a height adjustment auxiliary tool. It is a top view which shows a height adjustment auxiliary tool. It is a bottom view which shows a height adjustment auxiliary tool. It is (a) front view and (b) top view which show a top edge extraction jig | tool. It is explanatory drawing seen from the side surface explaining the state which mounted | wore the height adjustment auxiliary | assistance tool with the top edge extraction jig | tool. It is explanatory drawing seen from the bottom face side explaining the state which mounted | wore the top adjustment jig | tool with the height adjustment auxiliary tool. It is explanatory drawing for demonstrating the adjustment operation | work of the top end height of the foundation concrete using the height adjustment tool to which the height adjustment auxiliary tool was attached. It is explanatory drawing for demonstrating the height adjustment operation | work of the anchor bolt using the height adjustment tool to which the height adjustment auxiliary tool was attached. It is explanatory drawing explaining the relationship of (I) reference | standard height, (II) top edge height, and (III) anchor bolt height by a height adjustment tool.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 are a partially broken front view, a right side view, an enlarged plan view and a height adjustment tool 10 used for adjusting the height of the top end of concrete and the height of an anchor bolt according to an embodiment. It is shown by the enlarged bottom view. In addition, in the following description, it is assumed that the height adjustment tool 10 is vertically and longitudinally aligned with the vertical and longitudinal directions of FIG.

  As shown in FIGS. 1 and 4, the height adjuster 10 is a straight rod-shaped member, and is a hollow rectangular column-shaped long base 11 made of aluminum and a center hole penetrating in the longitudinal direction of the base 11. A long rod-shaped shaft portion 16 that is rotatably inserted into the shaft 12 is provided coaxially. The base 11 is provided with a stop 13 on the lower end side. Moreover, the scale 11 is carved in the base 11 over the full length of the longitudinal direction at the front and back. The shaft portion 16 includes a cylindrical aluminum main body portion 17 that is longer than the base portion 11, an iron driver portion 18 that is smaller in diameter and shorter than the main body portion 17 that extends coaxially from the lower end of the main body portion 17, and a main body portion. A disc part 21 provided integrally with the upper end of 17 is provided, and a disc-shaped level 22 is coaxially attached to the upper surface of the disc part 21. At the center of the surface of the level 22 is a circular mark 22a that serves as a guide for the position of the bubbles. A rubber cover 23 is put on a part of the upper surface of the disk part 21 and the level 22, and the operation part 19 is a combination of these. The shaft portion 16 is disposed between the disk portion 21 and the stopper portion 13 provided at the lower end of the base portion 11 so as to be rotatable with respect to the base portion 11 and not movable in the longitudinal direction.

On the outer wall surface of the base 11, a thin and long rectangular tubular positioning portion 24 made of aluminum or resin is fitted so as to surround the base 11 so as to be slidable in the longitudinal direction. 27 is fastened and fixed. The positioning part 24 is provided with a rectangular window 25 extending in the longitudinal direction on the front side, and a line 26 is horizontally provided at the upper and lower intermediate positions on the front, back and left and right sides. The back scale graduation 14 can be visually recognized by the window 25, and the length dimension can be determined together with the line 26. A light receiving portion 29 of a laser surveying instrument 28 to be described later can be attached to the side wall of the positioning portion 24. In the present embodiment, as shown in FIG. 5, the height adjustment assisting tool that allows the driver unit 18 of the height adjusting tool 10 to operate the height adjusting function of the height adjusting tool 10 more effectively. 30 is attached integrally.

  As shown in FIGS. 6 to 9, the height adjustment assisting tool 30 is made of a resin-made rod-like main body 31 and a resin-made cylindrical fastening member that is placed on the outer peripheral surface of one end side (the upper end side in FIG. 6). An attachment member 46 is provided. The rod-shaped main body 31 includes a cylindrical lower side portion 32, an upper side portion 39 having a smaller diameter than the cylindrical lower side portion 32 extending coaxially from the upper surface 32 a of the lower side portion 32, and a right outer peripheral surface of the lower side portion 32. And a columnar magnet mounting portion 35 provided integrally on the 32c side. The lower side portion 32 and the magnet attachment portion 35 are parallel to each other in the axial direction. A lower insertion hole 33 is provided in the center of the bottom surface 32b of the lower side portion 32 so as to be recessed in a columnar shape in the axial direction, and extends to substantially the middle of the lower side portion 32 in the axial direction. Further, the lower portion 32 is integrally provided with a pair of sandwiching pieces 34 protruding downward in the axial direction on both the left and right sides of the bottom surface 32b. The sandwiching piece 34 is a thick plate having a predetermined thickness in the radial direction and curved in an arc shape with a central angle of approximately 70 ° along the outer peripheral edge of the bottom surface 32b.

  The magnet mounting portion 35 has an upper surface that is flush with the upper surface 32 a of the lower side portion 32, and the axial length is slightly less than half the axial length of the lower side portion 32. The magnet mounting portion 35 is provided with a mounting hole 36 that is coaxially recessed from the bottom surface 35a side, and a cylindrical magnet 37 that constitutes the magnet portion together with the magnet mounting portion 35 is inserted and fixed in the mounting hole 36. It has come to be. The magnet 37 is a neodymium magnet or the like having a strong magnetic force. As shown in FIG. 6, the magnet 37 slightly protrudes from the bottom surface 35 a of the magnet mounting portion 35, and the protruding surface 37 a of the magnet 37 is flush with the bottom surface 33 a of the lower insertion hole 33.

  The upper portion 39 has a cylindrical shape with a slightly tapered upper end side, and is provided with a columnar upper insertion hole 41 coaxially extending from the center of the upper end surface to the vicinity of the bottom portion in the axial direction. As shown in FIG. 8, a cross-shaped insertion hole 41 b into which the head of the driver portion 18 of the height adjuster 10 is inserted is provided on the bottom surface 41 a of the upper insertion hole 41. In addition, the upper portion 39 is provided with four narrow slits 42 that are notched in the vertical direction at the front and rear and left and right positions surrounding the upper insertion hole 41 and reach the vicinity of the bottom surface 41 a of the upper insertion hole 41. The upper portion 39 is provided with four attachment pieces 44 extending in the axial direction and separated from each other by four slits 42. The four slits 42 and the four attachment pieces 44 separated from each other constitute a displacement portion 43. Each mounting piece 44 has an inclined portion 44a whose outer periphery on the distal end side is slightly inclined toward the distal end, and a thread groove 45 is formed along the axial direction on the outer peripheral surface below the inclined portion 44a. . On the outer peripheral side of the displacement part 43, a fastening member 46 that constitutes a fixed part together with the upper part 39 is fitted.

  As shown in FIGS. 6 and 7, the tightening member 46 has a thin cylindrical shape made of resin, and slightly increases in the axial direction toward the upper end where the upper axial length occupies approximately 1/3 of the entire length. An inclined truncated cone-shaped inclined cylinder part 47 and a lower cylindrical fitting cylinder part 48 are integrally provided. The inner diameter on the upper end side of the inclined cylindrical portion 47 is smaller than the outer diameter of the thread groove 45 portion of the upper portion 39. The fitting cylinder portion 48 has the same outer diameter as the outer diameter of the lower portion 32, the inner diameter is equal to the outer diameter of the upper portion 39, and the inner peripheral surface is screwed into the screw groove 45 of the upper portion 39. The screw hole portion 49 is provided. The tightening member 46 is attached to the upper portion 39 by fitting into the upper portion 39 and screwing the screw hole portion 49 into the screw groove 45.

Next, attachment of the height adjustment assisting tool 30 to the height adjustment tool 10 will be described with reference to FIG. The screw hole of the fitting cylinder part 48 of the tightening member 46 in a state where the driver part 18 of the height adjuster 10 is inserted into the upper insertion hole 41 of the upper part 39 and the head part is inserted into the insertion hole 41b. The part 49 is screwed into the thread groove 45 and rotated. Accordingly, the inclined cylindrical portion 47 can be deformed by applying a radially inward pressing force to the four attachment pieces 44 of the upper portion 39, and the displacement portion 43 is reduced in diameter. As a result, the driver portion 18 is tightened by the four attachment pieces 44, and the height adjuster 10 is firmly fixed to the upper portion 39. Thus, according to the present embodiment, the tip end side of the driver portion 18 of the height adjusting tool 10 is inserted into the upper insertion hole 41 of the rod-shaped main body 31 of the height adjusting auxiliary tool 30, and By tightening the upper portion 39 with the tightening member 46, the height adjuster 10 can be easily and firmly fixed to the upper portion 39, and the height adjuster 10 can be easily detached from the upper portion 39. is there.

  Next, attachment of the height adjustment assisting tool 30 fixed to the height adjustment tool 10 to the top edge extraction jig 50 used for adjusting the height of the top edge of the concrete will be described. As the top edge jig 50, for example, the one shown in FIG. 10 is generally used. The top end jig 50 is made of a long bar-shaped body 51 made of resin, a round bar-shaped adjustment portion 53 that is screwed to the upper end side of the main body 51 to be movable up and down, and a lower end of the main body 51. A fixed annular reinforcing bar attachment portion 56 is provided. The main body 51 is an attachment portion 52 having a screw hole (not shown) whose upper half is thicker than the lower half.

  The adjustment portion 53 is provided with a pair of triangular plate-like blade portions 54 that extend symmetrically in both radial directions at a position away from the upper end of the outer peripheral surface, and is axially disposed on the lower outer peripheral surface of the blade portion 54. A threaded portion 55 is provided. The adjusting portion 53 is screwed to the mounting portion 52 by a screw portion 55 so as to be movable up and down. The adjustment portion 53 has a first reference surface whose upper end is aligned with the top of the concrete, and an attachment groove 53a in which the head of the driver portion 18 can be fitted is provided on the upper end surface. The wing | blade part 54 represents the 2nd reference surface used as the reference | standard for pouring a leveler. The reinforcing bar attaching portion 56 is a cylindrical shape that is integrally attached with the axial direction aligned with the longitudinal direction of the main body 51 at one circumferential position on the lower end side of the main body 51, and extends in a semicircular shape and is engaged with the inner side of the tip. A first fastening piece 57 having a stop inner claw 57a and a second fastening piece 58 extending in a semicircular shape on the opposite side of the first fastening piece 57 and having a locking outer claw 58a on the outer side of the tip are provided. Yes. The reinforcing bar attaching portion 56 is tightly attached to the reinforcing bar by surrounding and fitting the reinforcing bars with the first fastening pieces 57 and the second fastening pieces 58 and locking the locking inner claws 57a to the locking outer claws 58a. Tightened and fixed.

  As shown in FIGS. 11 and 12, the main body 51 of the top end fitting jig 50 fixed vertically to a reinforcing bar (not shown) is below the height adjustment auxiliary tool 30 fixed to the height adjustment tool 10. By inserting the pair of sandwiching pieces 34 between the pair of blade parts 54 inserted into the lower insertion hole 33 provided in the part 32 and in contact with the bottom surface 32b of the lower side part 32, the blade part 54 is sandwiched between 34 is locked. Therefore, by rotating the operation part 19 of the height adjuster 10, the blade part 54 is also rotated integrally. As a result, the adjustment portion 53 moves up and down, so that the height adjustment of the top end jig 50 is easily performed.

Next, a setting example of the top end height by the top end extraction jig 50 using the height adjuster 10 will be described with reference to FIGS. A top end jig 50 is provided at the upper end side of the vertical reinforcing bar 2 erected between a pair of formwork columns 1 erected opposite to each other at the site of placing the foundation concrete for housing at the reinforcing bar mounting portion 56. Fixed. The main body 51 of the top end jig 50 is inserted into the lower insertion hole 33 of the height adjustment assisting tool 30 fixed to the height adjustment tool 10, and the pair of blade portions 54 are sandwiched between the sandwiching pieces 34. The position of the positioning portion 24 of the height adjuster 10 is adjusted in advance so as to be a reference height K, for example, the height of the tension. The positioning portion 24 is slid with the reference height K as a reference so that the top end height, for example, the position K1 150 mm below the reference height K is adjusted. The relationship between the reference height K and the top edge height K1 by the light receiving unit 29 attached to the positioning unit 24 and the adjustment by the laser surveying instrument 28 are schematically shown in FIG. In this state, the operation unit 19 of the height adjusting tool 10 is rotated to move the adjustment unit 53 of the top edge jig 50 up and down until the laser beam from the laser surveying instrument 28 reaches the light receiving unit 29 position. By adjusting the height, the top position can be determined.

  Next, an example of setting the height of the anchor bolt using the height adjuster 10 will be described with reference to FIGS. The positioning unit 24 is aligned with a position K2 corresponding to the upper end position of the anchor bolt 61 by sliding the positioning unit 24 with reference to the position K1 corresponding to the top end height of the positioning unit 24 of the height adjuster 10. Is done. In the present embodiment, the projecting surface 37a of the magnet 37 is flush with the bottom surface 33a of the lower insertion hole 33, and when the height of the top end is determined, the height of the projecting surface 37a of the magnet 37 is the top end. It matches the height. Therefore, the height adjustment is performed by moving the positioning unit 24 to a position K2, for example, 100 mm above, which is the difference between the predetermined top height and the tip height of the anchor bolt, with reference to the top height K1. The height of the anchor bolt can be easily determined by the tool 10. The relationship between the top height K1 and the anchor bolt height K2 by the light receiving unit 29 attached to the positioning unit 24 of the height adjuster 10 and the adjustment by the laser surveying instrument 28 are schematically shown in FIG.

  As shown in FIG. 14, an anchor bolt support member 4 having a mounting portion 5, a support base 6, and a sandwiching portion 7 is disposed between a pair of mold rows 1, and the mounting portion 5 side is located at the upper end of one mold row 1. It is fixed with screws. On the back side of the support base 6, a holding portion 7 that can be supported with an anchor bolt 61 interposed therebetween is disposed. A bolt 7a of the clamping portion 7 is inserted into a slit 6a extending in the longitudinal direction of the support base 6 and protrudes to the front side, and a tightening nut 8 is screwed to the bolt 7a. The anchor bolt 61 that has been made vertical is fixed to the support base 6 by tightening the nut 8 in a state of being sandwiched between the clamping part 7 and the back side of the support base 6. While the anchor bolt 61 is sandwiched between the sandwiching portions 7, the magnet 37 provided on the lower end side of the rod-shaped main body 31 with the height adjusting tool 10 to which the height adjusting auxiliary tool 30 is attached and the anchor bolt 61 are held by hand. The end of the anchor bolt 61 is attracted to and hung.

  In this state, the height adjustment tool 10 with the anchor bolt 61 suspended is moved up and down, and the height is adjusted using the laser surveying instrument 28 until the position K2 of the light receiving unit 29 attached to the height adjustment tool 10 is reached. As a result, the anchor bolt 61 is set to a specified height. After the height is determined, the anchor bolt 61 is positioned and fixed to the anchor bolt support member 4 by tightening the bolt 7 a of the clamping portion 7 with the nut 8. Thereafter, the height adjusting tool 10 and the height adjusting auxiliary tool 30 are removed from the anchor bolt 61. As a result, according to the present embodiment, the height adjustment tool 10 can be simply moved up and down, and the top height adjustment work of the top edge jig 50 and the positioning work of the anchor bolt 61 can be simplified and compared with the conventional one. It can be performed with high accuracy. Moreover, since the height adjustment tool 10 is made of aluminum or the like and is lightweight, the burden of the height adjustment work is reduced.

  In the above-described embodiment, the level 22 is integrally provided on the operation unit 19 at the upper end of the height adjuster 10. However, instead of this, only the level can be attached to the base 11. Further, instead of the anchor bolt support member 4 of the above embodiment, an anchor bolt support member that is positioned with a nut screwed into the anchor bolt after the anchor bolt is inserted into the center mounting hole and the height is adjusted. There may be.

  In addition, in the said Example, although the height adjustment auxiliary tool 30 which enables the smoother operation of the height adjustment function of the height adjustment tool 10 is attached integrally, height adjustment assistance is needed as needed. Except for the tool 30, implementation with only the height adjusting tool 10 is also possible. In this case, the height of the top end can be adjusted by fitting the driver portion 18 of the height adjustment tool 10 into the mounting groove 53a at the top end of the top end extraction jig 50.

Moreover, in the said Example, although the height adjustment auxiliary tool 30 has provided the magnet attaching part in the outer peripheral side of a lower part, it can replace with this and can also provide a magnet attaching part in the bottom part of a lower part. It is. Furthermore, in the said Example, although the height adjustment auxiliary tool 30 has the protrusion surface 37a of the magnet 37 flush with the bottom face 33a of the lower insertion hole 33, it is not restricted to this.

  Further, the height adjustment aid shown in the above embodiment is not limited to the one shown in FIG. 10, but a thin round bar is attached to one end of the long bar, and the round bar is used as an upper insertion hole. It may be one that can be fixed by insertion. In addition, the structure of each part of the height adjusting tool and the height adjusting auxiliary tool shown in the above embodiment is merely an example, and various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Height adjustment tool, 11 ... Base part, 14 ... Scale scale, 16 ... Shaft part, 18 ... Driver part, 19 ... Operation part, 24 ... Positioning part, 25 ... Window, 26 ... Line, 29 ... Light-receiving part, 30 ... height adjustment assisting tool, 31 ... rod-shaped main body, 32 ... lower part, 33 ... lower insertion hole, 34 ... clamping piece, 35 ... magnet mounting part, 37 ... magnet, 39 ... upper part, 41 ... upper insertion Hole, 42 ... Slit, 43 ... Displacement part, 44 ... Mounting piece, 45 ... Screw groove, 46 ... Tightening member, 49 ... Screw hole part, 50 ... Casting jig, 51 ... Main body, 53 ... Adjustment part, 54 ... blade part, 61 ... anchor bolt.

Claims (3)

  A base portion having a central hole penetrating in the longitudinal direction in a rod shape, and extending from both ends of the base portion so as to be rotatable and axially immovable in the central hole, and an operation portion is fixed to one end side. In a height adjuster having a shaft portion provided with a driver portion on the end side, a scale scale extending in the longitudinal direction is formed on the outer surface of the base portion, and is fitted on the base portion so as to be slidable in the longitudinal direction. And a height adjusting tool provided with a positioning portion that can be fixed at an arbitrary position.   A resin rod-shaped main body, an upper insertion hole for inserting the driver portion extending in the longitudinal direction on one end side of the rod-shaped main body, and a plurality of portions around the upper insertion hole A displacement portion made of a plurality of mounting pieces separated by slits extending in the direction and made elastically deformable in the axial direction, and a cylindrical shape fitted to the outer peripheral side of the displacement portion and tightening the displacement portion from the outer peripheral side A lower insertion hole into which a tip end of a top end jig for determining the top end position of the concrete extending in the longitudinal direction on the other end side of the rod-shaped main body can be inserted, and the lower insertion A pair which is fitted between a pair of blade portions provided in the vicinity of the tip of the top end extending jig extending in the longitudinal direction of the rod-shaped main body on both sides of the hole, and can be locked to the blade portions. Is placed on the outer peripheral surface of the other end of the rod-shaped body and the anchor bolt is adsorbed at the end A hanging capable magnet portion Te is provided a height adjustment aid is, the height adjuster according to claim 1, characterized in that it is detachably fixed to said driver unit at one end.   The protruding surface of the magnet part is a flat surface perpendicular to the longitudinal direction of the rod-shaped main body, and the flat surface is flush with the bottom surface of the lower insertion hole. 2. The height adjuster according to 2.

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