JP3193682U - Concrete top edge indicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete top display tool having excellent workability of top level display. A top sleeve body 6 is attached to a top display main body 3 to form a top display assembly P. The top display assembly P is fitted onto the support shaft 1 so as to be movable in the axial direction a of the support shaft 1. The crown display main body 3 and the crown sleeve body are relatively movable in the axial direction a. The top display main body 3 has a plurality of chuck claws 20, and the top sleeve body has a pressing inner peripheral surface 5C. The pressing inner peripheral surface 5C is arranged so as to be in contact with each chuck claw 20 so as to be in contact with each other. Each chuck claw 20 is arranged so as to sandwich the support shaft 1. The pressing inner peripheral surface 5C abuts on each chuck claw 20 and presses against the support shaft 1 by the relative movement of the top display main body and the top sleeve body. Each chuck claw 20 sandwiches the support shaft 1 by pressure welding to the support shaft 1 and fixes the top display main body to the support shaft 1. [Selection diagram] FIG. 9

Description

  The present invention relates to a concrete top end indicator that displays the top level of cast concrete at the site (area) where the concrete is placed.

  As a technique for displaying the top level of cast concrete, Patent Document 1 discloses a concrete top end display tool including a screw support shaft, a support piece, and a top end display unit. In Patent Document 1, a screw support shaft is supported by a stud member with a support piece and is erected on a beam member. The top end display unit includes a head, a plurality of pillars, and a pedestal, and connects the head and the pedestal at the plurality of pillars. The head displays the top level of the cast concrete. A female screw that is screwed onto the screw support shaft is formed on the base. The top end display unit is supported by the screw support shaft by screwing the screw support shaft onto the female screw of the base.

  In Patent Document 1, the top end display portion is rotated with respect to the screw support shaft, and the head is moved in the axial direction of the screw support shaft, so that the head is positioned at the top end level of the cast concrete.

JP 2004-27568 A

  In Patent Document 1, since the head is positioned at the top end level of the cast concrete by rotating the top end display portion with respect to the screw support shaft, it is necessary to rotate until the head reaches the top end level. Inferior workability of the top level display.

  An object of the present invention is to provide a concrete top end indicator which can perform the top end level of cast concrete with a simple work and is excellent in workability for displaying the top end level.

  Claim 1 according to the present invention comprises a support shaft erected in a concrete placing area, a top end display body having a top end display portion, and a top end sleeve body attached to the top end display body. A top end display assembly in which the top end display body and the top end sleeve body are movably fitted in the axial direction of the support shaft and are externally fitted to the support shaft; and the top end display body or the top end A chuck claw portion formed on one side of the sleeve body and arranged so as to sandwich the support shaft, and the chuck claw formed on the other side of the top end display body or the top end sleeve body and the support shaft. And a pressing portion disposed so as to be in contact with the chuck claw portion, the top end display main body and the top end sleeve body are relatively movable in the axial direction, and the pressing Part of the top end display body and the top end sleeve body In pair movement, the chuck claw is brought into contact with the chuck claw, and the chuck claw is pressed against the support shaft, and the chuck claw is pressed against the support shaft to sandwich the support shaft. A concrete top end display tool, wherein a top end display body is fixed to the support shaft.

  According to a second aspect of the present invention, the top end display body is formed at a top end cylindrical portion that is externally fitted to the support shaft so as to be movable in the axial direction, and an upper end of the top end cylindrical portion. A top end display portion for displaying the top end level of the cast concrete, a chuck claw portion formed on the lower end side of the shaft of the top end tube portion and arranged to sandwich the support shaft, and an outer periphery of the top end tube portion A sleeve cylinder portion that is externally fitted to the support shaft so as to be movable in the axial direction, and into which the chuck pawl and the male screw portion are inserted, A pressing portion formed on the lower end side of the inner periphery of the sleeve tube portion, the chuck claw portion being positioned between the sleeve and the support shaft, and disposed so as to be in contact with the chuck claw portion; and an inner periphery of the sleeve tube portion An internal thread portion formed, and the top end display body and the top end slot The body is configured such that the male screw portion is screwed into the female screw portion to constitute the top end display assembly, and is relatively rotatable by screwing of the male screw portion and the female screw portion. A relative rotation of the top end display body and the top end sleeve body is brought into contact with the chuck claw portion, and the chuck claw portion is pressed against the support shaft, and the chuck claw portion is pressed against the support shaft. The concrete top end indicator according to claim 1, wherein the top end display body is fixed to the support shaft by sandwiching the support shaft.

  According to a third aspect of the present invention, the top end cylinder part is disposed between the top end display part and the male screw part, and has a flexible part that connects the top end display part and the male screw part. It is a concrete top end indicator of Claim 2 characterized by the above-mentioned.

According to the first aspect of the present invention, the top end sleeve is mounted on the top end display body to constitute the top end display assembly, and the top end sleeve body and the top end display body of the top end display assembly are connected to the shaft of the support shaft. It fits around the support shaft so that it can move in the center direction. The top end display body and the top end sleeve body are relatively movable in the axial direction of the support shaft to constitute the top end display assembly. Subsequently, the top end display assembly is moved in the axial direction of the support shaft to position the top end display portion at the top end level of the cast concrete.
Subsequently, the top end display body is gripped, and the top end sleeve body is moved relative to the top end display body in the axial direction. The pressing portion is brought into contact with the chuck claw portion by relative movement of the top end sleeve body, and presses the chuck claw portion against the support shaft. The chuck claw portion clamps the support shaft and presses the support shaft to fix the top end display body to the support shaft. As a result, the top end display unit can be positioned at the top end level of the cast concrete simply by moving the top end display assembly in the axial direction of the support shaft, and the top end sleeve body is axially centered with respect to the top end display body. The top end display body can be fixed to the support shaft only by relative movement in the direction, and the top end display section can be positioned at the top end level of the cast concrete with a simple operation. Can provide concrete top edge indicator.
The top end sleeve body is attached to the top end display body at a mounting position where the chuck claw portion is not pressed against the support shaft, and the pressing portion is moved to the chuck claw portion by relative movement in the axial direction with respect to the top end display body. Abut and the chuck claw is pressed against the support shaft. Further, the chuck claw portion has flexibility, and is deformed (elastically deformed) to the support shaft side by the pressing portion that comes into contact with the chuck claw portion, and can be pressed against the support shaft.

According to a second aspect of the present invention, the top end display main body and the top end sleeve body are formed by screwing the male screw portion into the female screw portion to constitute the top end display assembly. The male thread portion is inserted into the sleeve tube portion, and the chuck claw portion is positioned between the support shaft and the pressing portion. The top end display main body and the top end sleeve body are configured to be rotatable relative to each other by screwing the male screw portion and the female screw portion to constitute the top end display main body. Subsequently, in the top end display assembly, the top end cylinder part (top end display main body) and the sleeve cylinder part (top end sleeve body) are fitted on the support shaft so as to be movable in the axial direction.
Subsequently, the top end display assembly is moved in the axial direction of the support shaft to position the top end display portion at the top end level of the cast concrete. Subsequently, by gripping the top end display body and rotating the top end sleeve body relative to the top end display body, the male screw part is screwed to the female thread part, and the sleeve shaft cylinder part and the pressing part of the top end sleeve body Is moved relative to the chuck claw in the axial direction. By the relative rotation of the top end sleeve body and the top end display main body, the pressing portion is brought into contact with the chuck claw portion and presses the chuck claw portion against the support shaft. The chuck claw portion clamps the support shaft and presses the support shaft to fix the top end display body to the support shaft. As a result, the top end display assembly can be positioned at the top end level of the cast concrete simply by moving the top end display assembly in the axial direction of the support shaft, and the top end sleeve body is rotated relative to the top end display body. By simply doing, you can fix the top display body to the support shaft,
With a simple operation, the top end display portion can be positioned at the top end level of the placed concrete, and a concrete top end display tool excellent in workability of the top end level display can be provided.

  In the third aspect of the present invention, the flexible portion is disposed between the top end display portion and the male screw portion in the top end tube portion, and therefore, the concrete supply pipe used for placing the concrete is the top end display body 3. Even if it contacts, since a plastic part will bend and will restore to the original position, it will not become the hindrance of movement work, such as a concrete supply pipe.

  In the present invention, the top end display body is externally fitted to the support shaft so as to be movable in the axial direction of the support shaft, and the top end tubular portion into which the chuck claw portion and the male screw portion are inserted, and the top end tubular portion. A chuck claw portion is formed between the top end display portion that is formed on the upper end of the shaft and displays the top end level of the cast concrete and the lower end side of the shaft of the top end cylindrical portion, and is located between the support shaft and the chuck claw. The top end sleeve body is movable in the axial direction of the support shaft and is attached to the support shaft so as to be movable in the axial direction of the support shaft. A configuration having a sleeve tube portion to be fitted, a chuck claw portion formed on the lower end side of the shaft of the sleeve tube portion so as to sandwich the support shaft, and a male screw portion formed on the outer periphery of the sleeve tube portion is also adopted. it can.

It is a figure which shows the concrete top end indicator of 1st Embodiment, Comprising: (a) is a front view, (b) is an AA arrow line view of FIG. 1 (a), (c) is FIG. 1 (a). It is a BB arrow line view. In the concrete top end display tool of 1st Embodiment, it is a figure which shows the top end display main body of a top end display assembly, Comprising: (a) is a front view, (b) is CC arrow of Fig.2 (a). FIG. 2C is a sectional view taken along line DD in FIG. 2B, FIG. 2D is a sectional view taken along line EE in FIG. 2A, and FIG. 2E is a sectional view taken along line FF in FIG. FIG. In the concrete top end indicator of 1st Embodiment, it is a figure which shows the top end sleeve body of a top end display assembly, (a) is a front view, (b) is GG arrow of Fig.3 (a). FIG. 3C is a cross-sectional view taken along the line H-H in FIG. 3B, and FIG. 3D is a view taken along the line I-I in FIG. In the concrete top end display tool of the first embodiment, the top end sleeve body is mounted on the top end display body to configure the top end display assembly, (a) is an enlarged cross-sectional view showing the mounting position, (B) is a JJ arrow view of Fig.4 (a), (c) is an expanded sectional view which shows a deformation | transformation position, (d) is a KK arrow view of FIG.4 (c). It is a figure which shows the area | region to which concrete is laid, a support shaft, a mounting flat plate, and the reinforcing bar which carried out the lattice arrangement, (a) is a top view, (b) is a side view. It is the side view which has arrange | positioned the top end display assembly on the support shaft in the area | region which places concrete. It is the side view which inserted the support shaft in the top end cylinder part of the top end display assembly in the area where concrete is placed. In the concrete placement area, (a) is an enlarged cross-sectional view of the main part of FIG. 7, and (b) is a view taken along line LL of FIG. 8 (a). In the concrete placement area, move the top end display assembly, position the top end display section at the top end level of the placed concrete, and rotate the top end sleeve body relative to the top end display body (forward rotation). FIG. In the concrete placement area, (a) is an enlarged cross-sectional view of the main part of FIG. 9, and (b) is an MM arrow view of FIG. 10 (a). It is the side view which laid concrete. In the concrete top end display tool of 2nd Embodiment, it is a figure which shows the top end display main body of a top end display assembly, Comprising: (a) is a front view, (b) is NN arrow of Fig.12 (a). FIG. 12C is a cross-sectional view taken along line OO in FIG. 12B, and FIG. 12D is a view taken along the line PP in FIG. In the concrete top end display tool of 2nd Embodiment, it is a figure which shows the top end sleeve body of a top end display assembly, (a) is a front view, (b) is QQ arrow of Fig.13 (a). FIG. 13C is an RR cross-sectional view of FIG. 13B, and FIG. 13D is an SS arrow view of FIG. 13A. The top end display tool of 2nd Embodiment WHEREIN: It is the figure which comprised the top end sleeve body to the top end display main body, and comprised the top end display assembly, Comprising: (a) is a principal part expanded sectional view which shows a mounting position. (B) is the principal part expanded sectional view which press-contacted the chuck nail | claw to the support shaft. It is a figure which shows other embodiment of the concrete top end indicator of 1st and 2nd embodiment, Comprising: (a) is a principal part expanded sectional view of the concrete top end indicator of 1st Embodiment, (b) is. It is a principal part expanded sectional view of the concrete top edge display tool of 2nd Embodiment.

A concrete top end indicator according to the present invention will be described with reference to FIGS.
In addition, the concrete top end indicator of 1st and 2nd embodiment is demonstrated.

<First Embodiment>
Hereinafter, the concrete top edge display tool of 1st Embodiment is demonstrated with reference to FIG. 1 thru | or FIG.

1 to 11, a concrete top end indicator X1 (hereinafter referred to as “top end indicator X1”) according to the first embodiment is installed in a concrete placement area Y (site), and the top of the cast concrete is placed. Displays the end level.
As shown in FIGS. 1 to 11, the top end indicator X1 includes a support shaft 1, a top end display assembly P, a chuck claw portion 2, and a pressing portion 5.
As shown in FIGS. 1 to 4, the top end display assembly P includes a top end display body 3 and a top end sleeve body 6.

The support shaft 1 is erected in a concrete placing area (site) Y (see FIG. 5). The support shaft 1 is made of, for example, a metal such as iron or steel, and is a round steel having an outer diameter (outer diameter) D.
As shown in FIGS. 1 and 5, the support shaft 1 has a mounting plate 51 at the lower end of the shaft. The support shaft 1 and the mounting flat plate 51 constitute a support shaft body. The mounting flat plate 51 is made of a metal such as iron or steel, and is formed in a rectangular shape, for example. The mounting flat plate 51 has a plurality of mounting holes 52, 52,. Each of the mounting holes 52, 52,... Is formed on each corner side of the mounting flat plate 51 and opens through the mounting flat plate 51 on the front and back surfaces of the mounting flat plate 51.
The support shaft 51 has a shaft lower end 1 </ b> A fixed to the mounting plate 51.

  As shown in FIGS. 1, 2, and 4, the chuck claw portion 2 is formed on, for example, the top end display body 3 and is disposed so as to be able to sandwich the support shaft 1.

In the top end display assembly P, the top end display body 3 is externally fitted to the support shaft 1 so as to be movable in the axial direction a of the support shaft 1 as shown in FIGS.
As shown in FIGS. 1 and 2, the top end display main body 3 includes a top end cylindrical portion 11, a top end display portion 12, a chuck claw portion 2, and a male screw portion 14.

  The top end cylinder part 11 has a flexible part 17, and is composed of a base cylinder 15, a small diameter cylinder 16 and a flexible part 17 as shown in FIG. 2. The top end cylinder part 11 is fitted on the support shaft 1 so as to be movable in the axial direction a of the support shaft 1 (see FIGS. 7 and 8).

  As shown in FIG. 2, the base cylinder 15 is formed in a cylindrical shape having an inner diameter (inner diameter) d, for example. The inner diameter d of the base cylinder 15 and the outer diameter (outer diameter) D of the support shaft 1 have a relationship of inner diameter d> outer diameter D.

  As shown in FIG. 2, the small-diameter shaft cylinder 16 is formed in, for example, a cylindrical shape having the same inner diameter (inner diameter) d as that of the base cylinder 15. The small-diameter shaft cylinder 16 is formed continuously with the shaft lower end 15 </ b> A of the base cylinder 15. The small-diameter shaft cylinder 16 is reduced in diameter from the shaft lower end 15 </ b> A of the base cylinder 15 and extends in the axial direction a of the top end cylinder portion 11. The shaft lower end of the small-diameter shaft cylinder 16 constitutes the shaft lower end 11A of the top end cylinder portion 11.

The flexible portion 17 has flexibility and a function (elastic deformation) to restore and return to the original state, and is formed of, for example, synthetic resin, synthetic rubber, or the like.
As shown in FIG. 2, the flexible portion 17 is disposed between the top end display portion 12 and the male screw portion 14 (base shaft cylinder 15), and connects the top end display portion 12 and the male screw portion 14.
The flexible part 17 is composed of, for example, a plurality (eight) of flexible columns 18, 18,. Each of the flexible columns 18, 18,... Is connected to the shaft upper end 15 </ b> B of the base cylinder 15. Each of the flexible pillars 18, 18,... Is arranged at intervals in the circumferential direction of the base cylinder 15. Each of the flexible columns 18, 18,... Is disposed in a cylindrical shape in the circumferential direction of the base cylinder 15 and has the same inner diameter (inner diameter) d as that of the base cylinder 15.
Each of the flexible pillars 18, 18,... Extends on the opposite side to the small-diameter shaft cylinder 16 in the axial direction a of the top end cylinder portion 11. In the flexible portion 17, the shaft upper ends of the respective flexible columns 18, 18,... Constitute the shaft upper end 11 </ b> B of the top end cylinder portion 11.

As shown in FIGS. 1 and 2, the top end display portion 12 is formed on the shaft upper end 11 </ b> B of the top end tube portion 11. The top end display portion 12 is connected to the upper end of the shaft of each flexible column 18, 18,... (Flexible portion 17).
The top end display unit 12 has an arcuate surface 12A that protrudes from the shaft upper end 11B of the top end cylindrical portion 11, and the arcuate surface 12A is in contact with the small-diameter shaft cylindrical body 16 in the axial direction a of the top end cylindrical portion 11. Projects to the opposite side. In the top end display section 12, the apex b of the arc surface 12A is the top end level of the cast concrete.
The top end display unit 12 includes a display antenna 19. The display antenna 19 extends on the opposite side to the small-diameter shaft cylinder 16 in the axial direction a of the top end cylinder portion 11.

The chuck claw portion 2 is formed outside the small-diameter shaft cylinder 16 (outside the top-end display body 3) on the shaft lower end 11A side of the top end cylinder portion 11 (small-diameter shaft cylinder 16).
As shown in FIG. 2, the chuck claw portion 2 includes, for example, a plurality (four) of chuck claws 20, 20,... And a plurality (four) of cut grooves 21, 21,.

The chuck claws 20, 20,... Are arranged in the circumferential direction of the small-diameter shaft cylinder 16 with an interval (for example, an angle of 90 degrees). Each of the chuck claws 20, 20,... Has the same inner diameter (inner diameter) d as the small-diameter shaft cylinder 16 and is arranged in a cylindrical shape.
Each chuck claw 20, 20,... Has a contact inclined surface 20A, and the contact inclined surface 20A extends from the shaft lower end 11A of the top end tube portion 11 (small diameter shaft tube body 16) toward the base shaft tube body 15. Exists. The contact inclined surface 20 </ b> A extends in the axial direction “a” of the top end cylindrical portion 11, and projects in the radially outward direction of the small-diameter shaft cylindrical body 16 while gradually increasing the diameter. The contact inclined surface 20 </ b> A protrudes to the outer periphery of the base cylindrical body 15 in the radially outward direction of the small diameter cylindrical body 16. Thereby, each chuck nail | claw 20,20, ... is formed in a cross-sectional triangle (refer FIG. 4).

Each chuck nail | claw 20,20, ... lower end has outer diameter (outer diameter) D1. The lower ends of the chuck claws 20, 20,... Serve as the shaft lower end 11A of the top end cylinder portion 11 (small diameter shaft cylinder 16).
The upper ends of the chuck claws 20, 20,... Have the same outer diameter (outer diameter) D2 as that of the base cylinder 15.

Are formed between the chuck claws 20, 20,... And divide the chuck claws 20, 20,. Are arranged at intervals in the circumferential direction of the small-diameter shaft cylinder 16 (for example, at an angle of 90 degrees).
Each of the cut grooves 21, 21,... Extends from the shaft lower end 11 </ b> A of the top end tube portion 11 (small diameter shaft tube body 16) toward the base tube body 15 side in the axial direction a of the top end tube portion 11. Each of the cut grooves 21, 21,... Has a groove bottom 21a on the base cylinder 15 side.

In the chuck claw portion 2, each chuck claw 20, 20,... Has flexibility and a function of returning to its original state (elastic deformation), and is made of, for example, a synthetic resin. Each of the chuck claws 20, 20,... Is freely deformable (elastic) to the inside of the small diameter cylindrical body 16 (the top end cylinder portion 11) with a circumferential line including the groove bottom 21a of each of the cut grooves 21, 21,. Can be deformed).
In addition, the top end display main body 11 includes the top end cylinder part 11 (base cylinder 15, small-diameter shaft cylinder 16, each flexible column 18, and top end display part 19) and the chuck claws 20, 20,. It can be integrally formed with the same synthetic resin.

  As shown in FIGS. 1 and 2, the male screw portion 14 is formed on the outer periphery of the base cylinder 15 in the top end cylinder portion 11. The male screw portion 14 is disposed between the chuck claws 20, 20,... And the flexible columns 18, 18,. It is connected with the sex pillars 18, 18,. The male screw part 14 extends in the axial direction a of the top end cylinder part 11.

  As shown in FIGS. 1 and 3, for example, the pressing portion 5 is formed on the top end sleeve body 6 and is disposed so as to be in contact with the chuck claw portion 2 (each chuck claw 20, 20,...).

In the top end display assembly P, the top end sleeve body 6 is externally fitted to the support shaft 1 so as to be movable in the axial direction a of the support shaft 1 as shown in FIGS.
As shown in FIG. 3, the top end sleeve body 6 includes a sleeve cylinder portion 25, a pressing portion 5, and a female screw portion 26.

  As shown in FIG. 3, the sleeve cylinder portion 25 is formed in a cylindrical shape having an inner diameter (inner diameter) d1, for example. The inner diameter d1 of the sleeve shaft tube portion 25 and the outer diameter (outer diameter) D2 of the top end tube portion 11 (base shaft tube body 15) have a relationship of inner diameter d1> outer diameter D2.

As shown in FIG. 3, the pressing portion 5 is formed inside the sleeve cylinder portion 25 (inside the top end sleeve body 3) on the shaft lower end 25 </ b> A side of the inner periphery of the sleeve cylinder portion 25. The pressing part 5 is constituted by a pressing inner peripheral surface 5C, for example.
The pressing inner peripheral surface 5C extends in the axial direction a of the sleeve tube portion 25 from the shaft lower end 25A of the sleeve tube portion 25 toward the shaft upper end 25B, and gradually expands the inner periphery of the sleeve tube portion 25. It is continuous with the surface 25C. The pressing inner peripheral surface 5 </ b> C has an inner diameter (inner diameter) d <b> 2 at the shaft lower end 25 </ b> A of the sleeve cylindrical portion 25.
The inner diameter d2 of the pressing inner peripheral surface 5C and the inner diameter d1 of the sleeve cylindrical portion 25 have a relationship of inner diameter d2 <inner diameter d1. Further, the inner diameter d2 of the pressing inner peripheral surface 5C and the outer diameter D2 of the top end cylinder part 11 (base shaft cylinder 15) have a relationship of inner diameter d2> outer diameter D2.

  The female thread portion 26 is formed on the inner peripheral surface 25 </ b> C of the sleeve cylinder portion 25. The female thread portion 26 is formed on the shaft upper end 25B side from the pressing portion 5 (pressing inner peripheral surface 25C) in the axial direction a of the sleeve tube portion 25. The female thread portion 26 extends in the axial direction a of the sleeve tube portion 25.

In the top end display tool X1, the top end sleeve body 6 is mounted on the top end display body 3 and constitutes the top end display assembly P as shown in FIGS.
As shown in FIGS. 4 (a) and 4 (b), the top end sleeve body 6 includes the chuck claws 20, 20,..., The small-diameter shaft cylinder 16 and the male screw portion 14 (base shaft cylinder 15) as a sleeve cylinder portion 25. Is inserted into the sleeve tube portion 25 from the shaft upper end 25B. In the top end sleeve body 3, the pressing inner peripheral surface 5C is opposed to the chuck claws 20, 20,...
The top end display body 3 and the top end sleeve body 6 constitute a top end assembly plate P by relative rotation (forward rotation) and screwing the male screw portion 14 into the female screw portion 26. The top end display body 3 and the top end sleeve body 6 are relatively rotatable by screwing of the male screw portion 14 and the female screw portion 26 [see FIGS. 4A and 4B].
Accordingly, the top end display assembly P is configured by integrating the top end sleeve body 6 and the top end display body 3 together. Further, the top end sleeve body 6 and the top end display body 3 are relatively rotated (forward rotation) to a position where the chuck claws 20, 20,... Are not deformed (hereinafter referred to as “mounting positions”) by the pressing inner peripheral surface 5C. [Refer to FIG. 4 (a) and (b)].

In the top end display assembly P, when the top end sleeve body 6 is further rotated relative to the top end display body 3 from the mounting position shown in FIGS. 4A and 4B (forward rotation), FIG. And as shown to (d), the external thread part 14 is screwed by the internal thread part 26. As shown in FIG. Thereby, the top end sleeve body 6 can move relative to the top end display body 3 in the axial direction a.
When the relative rotation (forward rotation) of the top end sleeve body 6 proceeds, as shown in FIGS. 4C and 4D, the pressing inner peripheral surface 5C (the pressing portion 5) is moved to the chuck claws 20, 20,. Are abutted against the abutting inclined surface 20A, and the chuck claws 20, 20,... Are elastically deformed inside the top end cylinder portion 11 (small-diameter shaft cylinder 16). Each chuck claw 20, 20,... Is elastically deformed inside the small-diameter shaft cylinder 16 with a circumferential line including the groove bottom 21a of each cut groove 21, 21,. The inner diameter (inner diameter) d is reduced (see FIGS. 4C and 4D).
Further, the pressing inner peripheral surface 5C slides on the contact inclined surface 20A of the chuck claws 20, 20,... Toward the base cylinder 15 with the relative rotation (forward rotation) of the top end chuck body 3. . As a result, the elastic deformation of each chuck claw 20, 20,... Gradually increases, and the inner diameter (inner diameter) d of each chuck claw 20, 20,.

  In the top end display assembly P, the top end display body 3 and the top end sleeve body 3 are relatively rotated (reversely rotated) from the deformed positions shown in FIGS. 4C and 4D. b).

Next, installation of the top end display tool X1 and concrete placement will be described with reference to FIGS.
5 through FIG. 11, the same reference numerals as those in FIG. 1 through FIG.

As shown in FIG. 5, for example, the worker installs a formwork (not shown) on the reference plane Z, and divides the area Y for placing concrete.
Subsequently, the worker arranges a plurality of reinforcing bars 61, 61, ... in the region Y in the formwork. Each reinforcing bar 61, 61, ... is arranged on a plurality of concrete spacers (not shown) arranged on the reference plane Z. The support shaft 1 and the mounting flat plate 51 are located between the reinforcing bars 61, 61,. As shown in FIG. 5, the mounting flat plate 51 is disposed on the reference surface Z with the plate back surface 51 </ b> B in contact with the reference surface Z, and the support shaft 1 is erected in the region Y within the mold frame. The mounting plate 51 is fixed to the reference surface Z by hitting nails or the like (not shown) to the reference surface Z through the mounting holes 52, 52,.
Thus, the support shaft 1 is erected from the attachment flat plate 51 so as to extend into the region Y in the mold.
The mounting flat plate 51 may be fixed to the reference surface Z by providing an adhesive tape (double-sided adhesive tape) on the back surface 51A.

The operator attaches the top end sleeve body 6 to the top end display body 3 and configures the top end display assembly P in the same manner as described with reference to FIGS.
The top end sleeve body 6 is attached to the top end display body 3 as an attachment position where the chuck claws 20, 20,... Are not deformed (elastically deformed) by the pressing inner peripheral surface 5C [FIGS. b)].
In the top end display assembly P, the top end display body 3 and the top end sleeve body 6 are arranged coaxially, and the top end sleeve body 3 is positioned outside the diameter of the top end display body 3.

Subsequently, the worker arranges the top end display assembly P on the support shaft 1 as shown in FIG.
The top end assembly P is disposed with the shaft lower end 25 </ b> A of the sleeve tube portion 25 of the top end sleeve body 6 and the shaft lower end 11 </ b> A of the top end tube portion 11 facing the shaft upper end 1 </ b> B of the support shaft 1.

As shown in FIGS. 7 and 8, the operator moves the top end display assembly P in the axial direction a of the support shaft 1, and moves the support shaft 1 from the chuck claws 20, 20,. It is inserted into the portion 11 and the sleeve tube portion 25. As shown in FIG. 7, the support shaft 1 is inserted in the order from the shaft lower end 11A of the top end tube portion 11 into the small diameter shaft tube body 16 and the base shaft tube body 15, and the top end display assembly P (the top end display body) 3. It is arranged coaxially with the top end sleeve body 6).
At this time, as shown in FIG. 8, the top end cylinder part 11 has a gap between the outer periphery 1 </ b> C of the support shaft 1 and inserts the support shaft 1.
Thereby, in the top end display assembly P, the sleeve tube portion 25 and the top end tube portion 11 are fitted on the support shaft 1 so as to be movable in the axial direction a of the support shaft 1.
In the chuck claw portion 2, the chuck claws 20, 20,... Are arranged so as to be able to sandwich the support shaft 1 and are positioned in the circumferential direction of the support shaft 1 as shown in FIG. Further, since the top end display body 3 and the top end sleeve body 6 are in the mounting positions described with reference to FIGS. 4A and 4B, the pressing inner peripheral surface 5 </ b> C of the pressing portion 5 is between the support shaft 1. Are positioned so that the chuck claws 20, 20,... Are not pressed (elastically displaced) against the support shaft 1 (see FIG. 8).

  Subsequently, the operator moves the top end display assembly P in the axial direction a, and places the top end display portion 12 at the top end level of the cast concrete as shown in FIG. In the top end display section 12, the apex b of the arc surface 12A is positioned at the top end level of the cast concrete.

Subsequently, as shown in FIGS. 9 and 10, the operator holds the top end display body 3 and rotates the top end sleeve body 6 relative to the top end display body 3 (forward rotation).
The male screw portion 14 is screwed into the female screw portion 26 by the relative rotation (forward rotation) of the top end sleeve body 6, and the sleeve cylinder portion 25 (the top end sleeve body is formed by screwing the male screw portion 14 and the female screw portion 26. 6) moves relative to the top end cylinder part 11 (top end display body 3) in the axial direction a. The sleeve cylinder portion 25 of the top end sleeve body 6 moves toward the plastic portion 17 of the top end display body 3 in the axial direction a of the support shaft 1.
10, the pressing portion 5 is moved relative to the chuck claw portion 2 in the axial direction a, and the pressing inner peripheral surface 5C comes into contact with the chuck claws 20, 20,. In the pressing portion 5, the pressing inner peripheral surface 5C comes into contact with the contact inclined surface 20A of each chuck claw 20, 20,.

The pressing inner peripheral surface 5C of the pressing portion 5 slides on the contact inclined surface 20A of each chuck claw 20, 20,... With the relative movement (relative rotation) of the sleeve cylinder portion 25 (the top end sleeve body 3). Then, the chuck claws 20, 20 are elastically deformed.
As shown in FIG. 10, the pressing inner peripheral surface 5 </ b> C of the pressing portion 5 elastically deforms the chuck claws 20, 20... And presses the chuck claws 20, 20.

In the chuck claw portion 2, each chuck claw 20, 20,... Includes a groove bottom 21 a of each cut groove 21, 21,. Using the line as a fulcrum, it is elastically deformed inside the top end cylinder part 11 (small-diameter shaft cylinder 16) and is pressed against the support shaft 1.
As shown in FIG. 10, the chuck claws 20, 20,... Have the inner diameter (inner diameter) d reduced by press contact with the support shaft 1, and sandwich the support shaft 1. As a result, in the chuck claw portion 2, each chuck claw 20, 20,... Fixes the top end display body 1 to the support shaft 1.
At this time, the operator holds the top end display main body 3 and relatively rotates (forward rotation) the top end sleeve body 6, so that the top end display portion 12 is positioned at the top end level of the cast concrete.

  When the top end sleeve body 6 is slid to the vicinity of the upper ends of the chuck claws 20, 20,... While the pressing inner peripheral surface 5C is in contact with the contact inclined surface 20A by relative rotation (forward rotation), the pressing portion 5 The pressing inner peripheral surface 5C presses the entire inner peripheral surface 20B of the chuck grooves 20, 20,. Thus, each chuck claw 20, 20,... Maximizes the pressure contact area with the support shaft 1, firmly holds the support shaft 1, and firmly fixes the top display body 3 to the support shaft 1 (FIG. 10). reference).

  In addition, the operator holds the top end display body 3 and relatively rotates (reversely rotates) the top end sleeve body 6, thereby mounting the top end display body 3 and the top end sleeve body 6 (see FIG. 8). The top end display portion 12 can be positioned again at the top end level of the placed concrete.

Subsequently, as shown in FIG. 11, the operator holds and moves a concrete supply pipe (not shown), places concrete Q from the concrete supply pipe into the region Y in the formwork, and places the concrete Q. Pour to the top level of the area Y in the formwork.
At this time, the operator can confirm the top end level of the placing concrete Q by confirming the top end display tool X1 with the display antenna 19 and visually recognizing the top end display portion 12. The operator places concrete Q up to the apex b of the top end display portion 12.
In the top end indicator X1, when a concrete supply pipe (not shown) comes into contact with the top end display body 3, the flexible columns 18, 18,... Of the plastic portion 18 are bent and restored to their original positions. It does not interfere with the movement of concrete supply pipes (not shown).

Second Embodiment
Hereinafter, the concrete top end indicator of the second embodiment diameter and the like will be described with reference to FIGS. 12 to 14.
12 to FIG. 14, the same reference numerals as those in FIG. 1 to FIG. 11 denote the same members and the same configuration, and thus detailed description thereof will be omitted.

In the concrete top end indicator X2 (hereinafter referred to as “top end indicator X2”) of the second embodiment, the pressing portion 5 is formed on the top end display body 3 as shown in FIGS. It arrange | positions so that contact with the nail | claw part 2 is possible.
In the top end indicator X2, the chuck claw portion 2 is formed on the top end sleeve body 6 as shown in FIGS. 13 and 14, and is disposed so as to be able to sandwich the support shaft 1.

  In FIG. 12, the top end display main body 3 includes a top end cylinder portion 11, a pressing portion 5, a female screw portion 36, and a top end display portion 12.

  As shown in FIG. 12, the top end cylinder part 11 has a flexible part 17 (each flexible column 18, 18,...) And a base cylinder body 35, and the base cylinder plate 35 has an inner diameter, for example. (Inner diameter) It is formed in a cylindrical shape of d1. A shaft upper end 35B of the base cylinder 35 is connected to each of the flexible columns 18, 18,... (Flexible portion 17).

As shown in FIG. 12, the pressing portion 5 is formed on the outer side of the base cylinder 35 (inside the top end display body 3) on the shaft upper end 35 </ b> B side of the base cylinder 35. The pressing part 5 is constituted by a pressing inner peripheral surface 5C, for example.
The pressing inner peripheral surface 5C extends in the axial direction a of the base cylindrical body 35 from the shaft upper end 35B of the base cylindrical body 35 toward the shaft lower end, and gradually increases in diameter while gradually expanding the inner peripheral surface of the base cylindrical body 35. Continuous to 35C.
The lower shaft end of the base cylinder 35 constitutes the lower shaft end 11 </ b> A of the top tube portion 11.
The pressing inner peripheral surface 5 </ b> C has an inner diameter (inner diameter) d <b> 2 at the shaft upper end 35 </ b> B of the base cylindrical body 35.
The inner diameters (inner diameters) d1 and d2 of the base shaft cylinder 35 have a relationship of inner diameter d1 <inner diameter d2.

  The female thread portion 36 is formed on the inner peripheral surface 35 </ b> C of the base shaft cylinder 35. The female thread portion 36 is formed on the shaft lower end 11A side of the top end cylindrical portion 11 (base shaft cylindrical body 35) from the pressing portion 5 (pressing inner peripheral surface 5C) in the axial direction a of the top end cylindrical portion 11. The female thread portion 36 extends in the axial direction a of the top end shaft portion 11.

  In FIG. 13, the top end sleeve body 6 includes a sleeve tube portion 25, a chuck claw portion 2, and a male screw portion 44.

  As shown in FIG. 13, the sleeve cylinder portion 25 is composed of a base cylinder 45 and a small diameter cylinder 46.

  As shown in FIG. 13, the base cylinder 45 is formed in a cylindrical shape having an inner diameter (inner diameter) d, for example. The inner diameter (inner diameter) d of the base shaft cylinder 45 and the outer diameter (outer diameter) D of the support shaft 1 have a relationship of inner diameter d> outer diameter D.

  As shown in FIG. 13, the small-diameter shaft cylinder 46 is formed in, for example, a cylindrical shape having the same inner diameter (inner diameter) d as that of the base cylinder 45. The small-diameter shaft cylinder 46 is continuously formed on the shaft upper end 45B of the base cylinder 45. The small-diameter shaft tubular body 46 is reduced in diameter from the shaft upper end 45B of the base shaft tubular body 45 and extends in the axial direction a of the top end tubular portion 41. The shaft upper end of the small diameter cylindrical body 46 constitutes the shaft upper end 25 </ b> B of the sleeve cylindrical portion 25.

  The chuck claw portion 2 is formed on the outer side of the small diameter shaft cylindrical body 46 (outside of the top end sleeve body 6) on the shaft upper end 25B side of the sleeve cylindrical portion 25 (small diameter shaft cylindrical body 46). As shown in FIG. 13, the chuck claw portion 2 includes, for example, a plurality (four) of chuck claws 20, 20,... And a plurality (four) of cut grooves 21, 21,.

The chuck claws 20, 20,... Are arranged in the circumferential direction of the small-diameter shaft cylinder 46 with an interval (for example, an angle of 90 degrees). Each of the chuck claws 20, 20,... Has the same inner diameter (inner diameter) d as the small-diameter shaft cylinder 46 and is arranged in a cylindrical shape.
Each of the chuck claws 20, 20,... Has a contact inclined surface 20A, and the contact inclined surface 20A extends from the shaft upper end 25B of the sleeve tube portion 25 (small diameter shaft tube 46) toward the base shaft tube 45. To do. The contact inclined surface 20A extends in the axial direction a of the sleeve cylinder portion 25 and protrudes outward in the radial direction of the small-diameter shaft cylinder 46 while gradually increasing the diameter. The contact inclined surface 20 </ b> A protrudes to the outer periphery of the base cylinder 45 in the radially outward direction of the small diameter cylinder 46.

Each chuck nail | claw 20,20, ... upper end has outer diameter (outer diameter) D1. The upper ends of the chuck claws 20, 20,... Become the shaft upper end 25B of the chuck tube portion 25 (small-diameter shaft tube body 46).
Each lower end of the chuck claws 20, 20,... Has the same outer diameter (outer diameter) D <b> 2 as the base shaft cylinder 45.

.. Are formed between the chuck claws 20, 20,... And divide the chuck claws 20, 20,. .. Are arranged in the circumferential direction of the small-diameter shaft cylinder 46 with an interval (for example, an angle of 90 degrees).
Each of the cut grooves 21, 21,... Extends from the shaft upper end 25B of the sleeve tube portion 25 (small diameter shaft tube body 46) toward the base tube body 45 side in the axial direction a of the sleeve tube portion 25. Each of the cut grooves 21, 21,... Has a groove bottom 21a on the base cylinder body 45 side.

  Each of the chuck claws 20, 20,... Is deformable (elastically displaceable) inside the small-diameter shaft cylinder 46 with a circumferential line including the groove bottom 21a of each of the cut grooves 21, 21,.

  As shown in FIG. 13, the male screw portion 46 is formed on the outer periphery of the base cylinder 45 in the sleeve cylinder 25. The male thread portion 46 extends in the axial direction a of the sleeve tube portion 25.

In the top end indicator X2, the top end sleeve body 6 is mounted on the top end display body 3 as shown in FIG.
As shown in FIG. 14A, the top end sleeve body 6 includes the chuck claws 20, 20,..., A small-diameter shaft cylinder 46 and a male threaded portion 46 (base shaft cylinder 45) at the lower end of the top end shaft portion 11. It is inserted into the top end cylinder part 11 from 11A. In the top end display main body 3, the pressing inner peripheral surface 5 </ b> C is opposed to the chuck claws 20, 20 from the outer diameter side of the sleeve cylindrical portion 25 so as to be freely contactable.
The top end display body 3 and the top end sleeve body 3 constitute a top end display assembly P by relative rotation (forward rotation) and screwing the male screw portion 44 into the female screw portion 36. The top end display body 3 and the top end sleeve body 3 are made relatively rotatable by screwing of the male screw portion 44 and the female screw portion 36.
Thereby, the top end display body 3 and the top end sleeve body 6 are integrated to form the top end display assembly P. Further, the top end display body 3 and the top end sleeve body 6 relatively rotate to the mounting positions where the chuck claws 20, 20,... Are not deformed by the pressing inner peripheral surface 5C [see FIG.

In the top end display tool X2, the operator can freely move the top end sleeve body 6 and the top end display body 3 of the top end display assembly P in the axial direction a as described with reference to FIGS. It is fitted on the support shaft 1 [see FIG. 14 (a)].
In addition, the operator inserts the support shaft 1 into the sleeve shaft portion 25 and the top end shaft portion 11 from the shaft lower end 25 </ b> A of the sleeve tube portion 25. As shown in FIG. 14A, the support shaft 1 is inserted from the lower end 25A of the sleeve tube shaft 25 in the order of the base tube body 45 and the small diameter shaft tube body 46, and the top end display assembly P (the top end display body) 3. It is arranged coaxially with the top end sleeve body 6).
At this time, as shown in FIG. 14A, the sleeve cylindrical portion 25 has a gap between the outer periphery 1 </ b> C of the support shaft 1 and inserts the support shaft 1.
Thereby, in the top end display assembly P, the sleeve tube portion 25 and the top end tube portion 11 are fitted on the support shaft 1 so as to be movable in the axial direction a of the support shaft 1. In each chuck claw portion 2, each chuck claw 20, 20,... Is disposed so as to be capable of sandwiching the support shaft 1 and is positioned over the circumferential direction of the support shaft 1. Further, the pressing inner peripheral surface 5C of the pressing portion is positioned with the chuck claws 20, 20,... Between the pressing shaft and the support shaft 1, and the chuck claws 20, 20,. .

  Subsequently, the operator moves the top end display assembly P in the axial direction a and arranges the top end display portion 12 at the top end level of the cast concrete, as described with reference to FIGS.

Subsequently, as shown in FIG. 14B, the worker holds the top end display body 3 and rotates the top end sleeve body 3 relative to the top end display body 3 (forward rotation).
The male screw portion 44 is screwed into the female screw portion 36 by relative rotation (forward rotation) of the top end sleeve body 6, and the sleeve cylinder portion 25 is formed by screwing the male screw portion 44 and the female screw portion 36. It moves relative to the portion 11 in the axial direction a. The sleeve tube portion 25 moves toward the flexible portion 17 of the top end display body 3 in the axial direction a.
As a result, as shown in FIG. 14B, the chuck claw portion 2 is moved relative to the pressing portion 5 in the axial direction a, and each chuck claw 20, 20,... Abuts against the pressing inner peripheral surface 5C. . In the pressing portion 5, the pressing inner peripheral surface 5C is in contact with the contact inclined surface 20A of each chuck claw 20, 20,.

The pressing inner peripheral surface 5C of the pressing portion 5 slides on the contact inclined surfaces 20A of the chuck claws 20, 20,... With the relative rotation (relative movement) of the sleeve cylinder portion 25 (the top end sleeve body 3). The chuck claws 20, 20,... Are elastically deformed.
As shown in FIG. 14B, the pressing inner peripheral surface 5C presses the chuck claws 20, 20,... To the support shaft 1 by elastically deforming the chuck claws 20, 20,.

In the chuck claw portion 2, each chuck claw 20, 20,... Is a cylindrical wire including the groove bottom 21 a of each cut groove 21, 21,. Is used as a fulcrum and is deformed to the inside of the sleeve tube portion 25 (small-diameter shaft tube body 46) and is pressed against the support shaft 1.
As shown in FIG. 14B, the chuck claws 20, 20,... Have the inner diameter (inner diameter) d reduced by press contact with the support shaft 1, and sandwich the support shaft 1. Thereby, each chuck nail | claw 20,20, ... fixes the top end display main body 3 to the support shaft 1 through the small diameter shaft cylinder 46, the base shaft cylinder 45, the external thread part 44, and the internal thread part 36.

In the top end display tool X1, as shown in FIG. 15 (a), the base end cylinder body 15 of the top end display body 3 is press-fitted into the sleeve cylinder portion 25 of the top end sleeve body 3, so that the top end sleeve body 6 Can be mounted on the top end display body 3 to constitute the top end display assembly P. The male screw part 14 and the female screw part 26 are not formed in the top end cylinder part 11 and the sleeve cylinder part 25.
The top end display body 3 and the top end sleeve body 6 are relatively movable (relatively slidable) in the axial direction a of the support shaft 1. In the top end sleeve body 6, by moving the sleeve cylinder portion 25 relative to the top end cylinder portion 11 in the axial direction “a”, the pressing inner peripheral surface 5 </ b> C of the pressing portion 5 is the same as described in FIGS. 1 to 11. Are brought into contact with the chuck claws 20, 20,... And press the chuck claws 20, 20,. Each of the chuck claws 20, 20,... Is elastically deformed to the inside of the top end cylinder portion 11 (small-diameter shaft cylinder body 16) by contact with the pressing inner peripheral surface 5C, as described with reference to FIGS. The pressure shaft is pressed against the support shaft 1. Thus, in the chuck claw portion 2, each chuck claw 20, 20,... Clamps the support shaft 1 and presses the support shaft 1 to fix the top end display body 3 to the support shaft 1 [FIG. (See (a)].

In the top end display tool X2, as shown in FIG. 15 (b), the top end sleeve body 6 is fixed to the top end display body 3 by press-fitting the base cylinder 45 of the sleeve cylinder portion 25 into the top end cylinder portion 11. The top end surface assembly P can be configured by attaching to the top. The female screw part 36 and the male screw part 44 are not formed in the top end cylinder part 11 and the sleeve cylinder part 25.
The top end display body 3 and the top end sleeve body 6 are relatively movable (relatively slidable) in the axial direction a of the support shaft 1. In the top end sleeve body 6, by moving the sleeve cylinder portion 25 relative to the top end cylinder portion 11, the pressing inner surface 5 </ b> C of the pressing portion 5 corresponds to the chuck claws 20, 20 as described with reference to FIG. 14. Are brought into contact with the support shaft 1 by pressing the chuck claws 20, 20,. The lower chuck claws 20, 20,... Are elastically deformed to the inside of the sleeve cylinder portion 25 (small-diameter shaft cylinder 46) by contact with the pressing inner peripheral surface 5C, as described with reference to FIG. 1 is pressed. As a result, in the chuck claw portion 2, the chuck claws 20, 20,... Sandwich the support shaft 1 by pressure contact with the support shaft 1, and the radial shaft body 46, the base shaft body 45, the male screw portion 44, and the like. The top end display main body 3 is fixed to the support shaft 1 with the female screw portion 36 interposed therebetween (see FIG. 15B).

In the top end display tools X1 and X2, the support shaft 1 can also be driven directly into the reference plane Z such as the soil without having the mounting flat plate 51.
Moreover, the support shaft 1 can be substituted by, for example, a vertical reinforcing bar (not shown) arranged in the mold. The vertical reinforcing bars are erected in a region in the formwork, and the vertical reinforcing bars are directly inserted into the top end display assembly P described with reference to FIGS.
The support shaft 1 may use a screw shaft.

  In the top end display tools X1 and X2, the pressing portion 5 is not limited to the pressing inner peripheral surface 5C, and, for example, protrudes from the inner side of the sleeve cylindrical portion 25 or the inner side of the base cylindrical body 35 to the chuck claws 20, 20,. It may be a protrusion. The protrusions abut against the chuck claws 20, 20,... By the relative movement (relative rotation) of the top end display body 3 and the top end sleeve body 6, and can press the chuck claws 20, 20,. The configuration.

  The present invention is optimal for displaying the top level of cast concrete in the concrete placement area (site).

X1, X2 Concrete top end indicator P Top end display assembly 1 Support shaft 2 Chuck claw portion 3 Top end display body 5 Pressing portion 5C Pressing inner peripheral surface 6 Top end sleeve body 17 Flexible portion 18 Flexible column 20 Chuck claw 20A Contact inclined surface

Claims (3)

A support shaft erected in the concrete placement area;
A top end display body having a top end display section, and a top end sleeve body attached to the top end display body, the top end display body and the top end sleeve body in the axial direction of the support shaft A top end display assembly that is externally fitted to the support shaft to be movable;
A chuck claw portion formed on one of the top end display body or the top end sleeve body and disposed so as to sandwich the support shaft;
A pressing portion that is formed on the other of the top end display body or the top end sleeve body, and is positioned so as to be in contact with the chuck claw portion, the chuck claw portion being positioned between the support shaft and the support shaft. ,
The top end display body and the top end sleeve body are:
The relative movement in the axial direction is possible,
The pressing portion is
The relative movement of the top end display body and the top end sleeve body is brought into contact with the chuck claw portion, and the chuck claw portion is pressed against the support shaft,
The chuck claw portion is
A concrete top end display tool, wherein the top end display body is fixed to the support shaft by sandwiching the support shaft by pressure contact with the support shaft. The top end display body is
A top tube portion fitted around the support shaft so as to be movable in the axial direction;
A top end display part that is formed at the top end of the top end cylinder part and displays the top end level of the cast concrete;
A chuck claw portion formed on the lower end side of the top end cylindrical portion and disposed so as to sandwich the support shaft;
A male screw part formed on the outer periphery of the top end cylinder part,
The top sleeve body is
A sleeve tube part that is externally fitted to the support shaft so as to be movable in the axial direction, and into which the chuck claw part and the male screw part are inserted;
A pressing portion that is formed on the lower end side of the inner periphery of the sleeve tube portion, the chuck claw portion is positioned between the sleeve and the support shaft, and is disposed so as to be in contact with the chuck claw portion;
An internal thread portion formed on the inner periphery of the sleeve tube portion,
The top end display body and the top end sleeve body are:
The male screw part is screwed into the female screw part to constitute the top end display assembly, and is relatively rotatable by screwing the male screw part and the female screw part,
The pressing portion is
The relative rotation of the top end display body and the top end sleeve body is brought into contact with the chuck claw portion, and the chuck claw portion is pressed against the support shaft,
The chuck claw portion is
The concrete top end display tool according to claim 1, wherein the top end display body is fixed to the support shaft by sandwiching the support shaft by pressure contact with the support shaft. The top end cylinder part is
The concrete top end display tool according to claim 2, further comprising a flexible portion that is disposed between the top end display portion and the male screw portion and connects the top end display portion and the male screw portion.

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