JP7054151B2 - Top pointer - Google Patents

Description

The present invention relates to a crown pointer used to indicate the surface of a concrete layer to be cast, i.e., the finish level of the crown when constructing a deck (slab) from reinforced concrete.

As described in Patent Document 1, this type of crown pointer is composed of a rod-shaped crown pointer main body and a mounting bracket for attaching the crown pointer body to a reinforcing bar, and the crown pointer is described above. It is known that a top level indicator that displays the finish level of the top is attached to the main body so that the height can be adjusted.

Japanese Unexamined Patent Publication No. 2015-31101

In the conventional crown pointer having the above configuration, the rod-shaped crown pointer body is connected to the rod-shaped body made of hard synthetic resin to which the top-level indicator can be adjusted in height and the lower end of the rod-shaped body. It was composed of a mounting portion to be attached to the mounting bracket, and the mounting portion to the mounting bracket was composed of an elastic tubular body made of a soft synthetic resin. Therefore, when an operator trips over a rod-shaped body made of hard synthetic resin or a concrete supply pipe is caught, the elastic tubular body made of soft synthetic resin resists elasticity in the direction of external force with respect to the mounting bracket. It was configured so that the rod-shaped body made of hard synthetic resin would bend and fall in the direction of external force. Therefore, not only the cost is high because the rod-shaped top pointer body is composed of two parts, but also the position protruding from the mounting bracket of the elastic tubular body at the lower end is used as a fulcrum when the rod-shaped body is tilted laterally by an external force. As a result, the entire rod-shaped body will fall down in a straight rod state, so the radius of gyration of the upper end of the rod-shaped body will always be as large as the total length of the rod-shaped body, and an object will be placed on the upper end of the rod-shaped body. When caught, it takes time for the object to come off from the upper end of the rod-shaped body, in other words, there is a problem that the caught object is hard to come off.

The present invention proposes a crown pointer that can solve the above-mentioned conventional problems, and the crown pointer according to the present invention makes it easy to understand the relationship with the examples described later. Therefore, the reference symbols used in the description of the embodiment are shown in parentheses, and the top pointer body (1) and the mounting bracket (2) for attaching the top pointer body (1) to the reinforcing bar are shown. The top pointer main body (1) is a top pointer consisting of a round bar-shaped main body (3) and a top-end level display that is externally fitted to the round bar-shaped main body (3) so that the height can be changed freely. The round bar-shaped main body (3) is composed of a tool (4), a pull-out operation part (5) provided at the upper end thereof, and a small-diameter insertion shaft part (6) provided at the lower end thereof. Is integrally molded from an elastic synthetic resin material, and the mounting bracket (2) has a pair of side plate portions (14,17) facing each other in the vertical direction, and the upper plate portion has the round bar-shaped main body (3). A large-diameter through hole (23) that can be freely inserted and removed is provided, and the small-diameter insertion shaft portion (6) of the round bar-shaped main body (3) is elastically provided in the lower plate portion at a position concentric with the large-diameter through hole (23). A small-diameter through hole (22) that can be press-fitted and pulled out is provided, and the round bar-shaped main body (3) is inserted downward into the large-diameter through hole (23) to insert the small-diameter insertion shaft portion (6) at the lower end. The round bar-shaped main body (3) has the strength to stand up against the mounting bracket (2) when the small-diameter through hole (22) is press-fitted, and the round bar-shaped main body (3) receives a lateral external force. In the top pointer, which has the flexibility that the part standing upward from the mounting bracket (2) can bend against elasticity, the mounting bracket (2) has a horizontal reinforcing bar (27). ), And a pair of side plates (14,17) facing vertically when attached to the vertical vertical reinforcing bar (29), and a pair of side plates (15a, 15b) facing vertically when attached to the vertical vertical reinforcing bar (29). The large-diameter through hole (23,25) and the small-diameter through hole (22,24) are provided on both of these two sets of side plates .

According to the above-mentioned configuration of the present invention, the top pointer main body including the part that can be attached to and detached from the mounting bracket is one part of the integrally molded round bar-shaped main body, and two parts are made of different materials as in the conventional case. Compared to those that must be assembled and configured, the number of parts is small and it can be manufactured at low cost. Moreover, the round bar-shaped body of the top pointer body is inserted downward into the large-diameter through hole on the upper side of the mounting bracket, and then the small-diameter insertion shaft at the lower end of the round bar-shaped body is inserted into the small-diameter through hole on the lower side of the mounting bracket. Assembling to the mounting bracket is completed only by press-fitting against the elasticity, so that the entire crown pointer can be easily and easily assembled, and it can be carried out at a very low cost. Furthermore, the round bar-shaped body of the top pointer body that stands vertically from the mounting bracket in the used state can be bent 360 degrees in any direction against elasticity, and can be used as a mounting bracket as in the past. Compared to the case where the entire rod-shaped body of the crown pointer body is laid down with a straight rod as a fulcrum, the worker may stumble on the standing top pointer body or the concrete supply pipe. There is also an advantage that when the concrete is caught, the one caught on the top pointer body can be easily disengaged.

Further, according to the configuration of the present invention, the mounting bracket (2) has a pair of side plate portions (14, 17) facing in the vertical direction when mounted on the horizontally oriented reinforcing bar (27), and the vertical vertical orientation. A pair of side plate portions (15a, 15b) facing each other in the vertical direction when attached to the reinforcing bar (29) are provided, and the large-diameter through holes (23,25) and the small-diameter penetration are provided in both of these two sets of side plate portions. Since the holes (22,24) are provided, the crown pointer can be attached to either the horizontal reinforcing bar or the vertical vertical reinforcing bar. Moreover, even if the distance between the two sets of side plates is different, the same round bar-shaped body is used as it is, only the height at which the round bar-shaped body of the top pointer body is supported by the large-diameter through hole on the upper side is different. Can be done.

When the present invention is carried out , the round bar-shaped main body (3) has an inner surface of a lower plate portion having a stepped surface (3a) at the upper end of the small diameter insertion shaft portion (6) having the small diameter through hole (22). An insertion depth mark (26) along the circumferential direction can be provided at a height adjacent to the outer surface of the upper plate portion having the large-diameter through hole (23). According to this configuration, it is confirmed from the upper side of the mounting member that the entire small-diameter insertion shaft at the lower end of the round bar-shaped body is securely press-fitted into the small-diameter through hole in the side plate below the mounting bracket. It can be confirmed easily and surely, and it is inconvenient when using it while the insertion depth of the small diameter insertion shaft of the round bar-shaped main body is insufficient for the small diameter through hole of the mounting bracket, for example, from the mounting bracket to the top end when placing concrete. It is possible to prevent the pointer body from coming off. If two sets of top pointer mounting points having different intervals between the large-diameter through hole and the small-diameter through hole are provided as described above, each of the two sets of top pointer mounting points is provided. Corresponding upper and lower two-stage insertion depth marks (26,28) can be provided.

Further, the small-diameter insertion shaft portion (6) protruding from the inner peripheral surface of the small-diameter through hole (22,24) of the mounting bracket (2) and press-fitted into the small-diameter through hole (22,24). The protrusions (22a, 24a) that bite into the peripheral surface can be integrally formed. In order to facilitate the protrusions to bite into the peripheral surface of the small-diameter insertion shaft portion during press-fitting, it is desirable that the protrusion has a chevron-shaped cross section whose height gradually increases in the insertion direction of the small-diameter insertion shaft portion. Further, it is desirable to provide a plurality of these protrusions at equal intervals in the circumferential direction of the small diameter through holes. By providing such a protrusion, the pull-out resistance of the small-diameter insertion shaft portion of the inserted round bar-shaped main body can be increased, and the top pointer main body can be reliably held by the mounting bracket.

FIG. 1 is a partial vertical sectional side view showing a state in which it is attached to a horizontal reinforcing bar and used. FIG. 2 is a partial vertical sectional side view showing a state in which the reinforcing bar is attached to a vertical reinforcing bar in the vertical direction for use. FIG. 3 is a perspective view of the mounting bracket. FIG. 4 is a bottom view of the mounting bracket. FIG. 5A is an enlarged bottom view of the small diameter through hole of the mounting bracket, and FIG. 5B is an enlarged longitudinal side view of the small diameter through hole. FIG. 6 is a perspective view showing the top pointer body. 7A is a plan view of the top level indicator used for the top pointer body, FIG. 7B is a side view, and FIG. 7C is a bottom view. FIG. 8A is a rear view of the top level display tool, and FIG. 8B is a vertical sectional side view thereof.

Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings. Reference numeral 1 is a crown pointer body and 2 is a mounting bracket. The crown pointer main body 1 is composed of a round bar-shaped main body 3 and a top-end level display tool 4 that is externally fitted to the round bar-shaped main body 3 so that the height can be freely changed. The round bar-shaped main body 3 has a constant diameter. It consists of a perfectly circular shaft portion 3a, a circular flange-shaped pull-out operation portion 5 provided at the upper end of the shaft portion 3a, and a small-diameter insertion shaft portion 6 concentrically connected to the lower end of the shaft portion 3a. A concentric annular step surface 3b is formed between the small diameter insertion shaft portion 6 and the shaft portion 3a, and the entire round bar-shaped main body 3 is integrally molded from an elastic synthetic resin material, for example, a soft vinyl chloride resin. ..

As shown in detail in FIGS. 7A to 8B, the crown level indicator 4 is integrally molded with a synthetic resin such as POM (polyacetal or polyoxymethylene), and is a round bar-shaped main body of the crown pointer body 1. A peripheral wall portion 7 having a C-shaped plane shape having an inner diameter that allows the shaft portion 3a of 3 to be inserted from the small diameter insertion shaft portion 6 side, and a peripheral surface of the peripheral wall portion 7 at a position close to both free ends of the peripheral wall portion 7. A pair of left and right biting convex portions 8a and 8b projecting in a mountain shape along the direction, from the left and right sides of the outer peripheral surface of the peripheral wall portion 7, to the side opposite to the side with both free ends of the peripheral wall portion 7 each other. A pair of picking plate portions 9a, 9b extending in parallel, a pair of stopper portions 10a, 10b projecting from the inner side surfaces of the picking plate portions 9a, 9b in a direction approaching each other, and a front end of the peripheral wall portion 7. The pair of front end side wall portions 11a, 11b extending forward in parallel with each other, and the pair of front end side wall portions 11a, from the upper end of the front half portion of the pair of picking plate portions 9a, 9b to the upper end of the peripheral wall portion 7. Reinforcing flange portions 12a and 12b are provided so as to project outward in an arc shape from the region extending to the upper end of 11b. The upper surfaces of the opening / closing hinge portion 7a of the peripheral wall portion 7 located between the reinforcing flange portions 12a and 12b, the pair of picking plate portions 9a and 9b, and the pair of picking plate portions 9a and 9b are continuous with each other. The flat top level display surface 13 is provided. The pair of picking plate portions 9a and 9b extend downward from the peripheral wall portion 7, and are arcuate from the lower end position located directly below the peripheral wall portion 7 to the upper rear end position of the picking plate portions 9a and 9b. It has a shape that bends into a shape.

As shown in FIGS. 1 to 4, the mounting bracket 2 is formed of a single metal plate, and has a rectangular top plate portion 14, and both left and right sides of the top plate portion 14 along the length direction. Left and right side plate portions 15a and 15b bent from the same side to the same side, and front side diagonal plate portions 16 connected diagonally outward on the side with the left and right side plate portions 15a and 15b from the front end of the top plate portion 14. It is composed of a bottom plate portion 17 having a small width erected between the left and right side plate portions 15a and 15b so as to be located directly below the rear end portion of the top plate portion 14. One side plate portion 15a and the bottom plate portion 17 are connected by a bent connecting plate portion 17a having a width smaller than that of the bottom plate portion 17, and a wide locking portion 18a projecting from the free end of the bottom plate portion 17 is provided. The locking pieces 18 provided on both sides of the tip are fitted in the notch recesses 15c formed on the lower side of the rear end of the other side plate portion 15b. The left and right sides of the front diagonal plate 16 are integrally connected to the front sides of the left and right side plates 15a and 15b, and are pressed into a bag shape. Further, reinforcing bent pieces 15d and 15e are continuously provided on the rear side of the left and right side plate portions 15a and 15b.

Reinforcing bar fitting recesses 19 extending upward and rearward from substantially the entire lower hypotenuse from the lower end of the front diagonal plate portion 16 to the bottom plate portion 17 are formed in the left and right side plate portions 15a and 15b. The front diagonal plate portion 16 is provided with a through screw hole 20 in a direction toward the inner end of the reinforcing bar fitting recess 19 in a side view, and the fastening bolt 21 is screwed inward from the outside through the through screw hole 20. are doing. The bottom plate portion 17 is provided with a first small diameter through hole 22 having an inner diameter capable of press-fitting and fixing the small diameter insertion shaft portion 6 at the lower end of the round bar-shaped main body 3 in the top pointer main body 1, and is directly above the first small diameter through hole 22. At the rear end of the top plate portion 14 located at, the first large-diameter through hole 23 through which the shaft portion 3a of the round bar-shaped main body 3 in the top end pointer body 1 can be inserted is concentric with the first small-diameter through hole 22. It is provided in a shape.

Further, among the left and right side plate portions 15a and 15b, a second small diameter through hole 24 having the same inner diameter as the first small diameter through hole 22 is provided at a position close to the bottom plate portion 17 of the side plate portion 15b, and the side plate portion 15a is provided with a second small diameter through hole 24. Is provided with a second large-diameter through hole 25 having the same inner diameter as the first large-diameter through hole 23, concentrically with the second small-diameter through hole 24. The through screw holes 20, the first and second small diameter through holes 22, 24, and the first large diameter through holes 23 all have a burring process to increase the height of the peripheral wall of each of these holes. Although the second large-diameter through hole 25 is not burring processed, it may be burring processed in the same manner as other holes. The through screw holes 20 and the first large diameter through holes 23 are burred so as to protrude inside the mounting bracket 2, but the first and second small diameter through holes 22 and 24 are burred. , The burring process is applied so as to protrude to the outside of the mounting bracket 2. Then, on the inner peripheral surfaces of the first and second small-diameter through holes 22, 24, these first and second small-diameter through holes 22 are located at four locations adjacent to the outer edge thereof at equal intervals in the circumferential direction. The protrusions 22a and 24a that bite into the peripheral surface of the small diameter insertion shaft portion 6 that is press-fitted into the 24 are integrally formed. The protrusions 22a and 24a have a chevron-shaped cross section in which the height gradually increases in the insertion direction of the small-diameter insertion shaft portion 6 in order to easily bite into the peripheral surface of the small-diameter insertion shaft portion 6 during press-fitting.

For the crown pointer configured as described above, the crown pointer body 1 is attached to the mounting bracket 2 before use. At the time of this mounting, among the reinforcing bars arranged in the concrete placing space of the floor slab, when mounting the mounting bracket 2 on the horizontal reinforcing bar, as shown in FIG. 1, the top level indicator 4 is attached to the shaft portion in advance. The shaft portion 3a of the top pointer body 1 fitted externally to 3a is inserted from the side with the small diameter insertion shaft portion 6 from the first large diameter through hole 23 of the mounting bracket 2 toward the first small diameter through hole 22. The small-diameter insertion shaft portion 6 is press-fitted into the first small-diameter through hole 22 to the limit where the step surface 3b abuts on the inner surface of the bottom plate portion 17. As a result, not only the frictional force between the small diameter insertion shaft portion 6 and the first small diameter through hole 22, but also the protrusion 22a bites into the peripheral surface of the small diameter insertion shaft portion 6, so that the top pointer body 1 can be easily attached. It is fixed in a state where it does not come off from the metal fitting 2.

At this time, the peripheral surface of the shaft portion 3a of the round bar-shaped main body 3 protruding from the first large-diameter through hole 23 is adjacent to the outer surface of the top plate portion 14 of the mounting bracket 2 having the first large-diameter through hole 23. If a ring-shaped insertion depth mark 26 along the circumferential direction is provided at the height to be formed, the small diameter insertion shaft portion 6 is inserted into the first small diameter through hole to the limit where the step surface 3b abuts on the inner surface of the bottom plate portion 17. The situation in which the press-fitting is completely completed in 22 can be easily visually confirmed from the position of the insertion depth mark 26.

As shown in FIG. 1, the mounting bracket 2 to which the top pointer main body 1 is attached is covered with the mounting bracket 2 from above on the horizontal reinforcing bar 27, and the reinforcing bars of the left and right side plate portions 15a and 15b are fitted. A horizontal reinforcing bar 27 is fitted into the recess 19, and the fastening bolt 21 is screwed in with the posture of the mounting bracket 2 determined so that the round bar-shaped main body 3 of the top pointer main body 1 stands vertically, and the fastening bolt 21 is screwed in. The horizontal reinforcing bar 27 is sandwiched and fixed between the tip of the mounting bracket 2 and the inner end of the reinforcing bar fitting recess 19 of the mounting bracket 2. As a result, the round bar-shaped main body 3 of the top pointer main body 1 is fixed in a state of standing vertically from the mounting bracket 2, so that the height of the top level indicator 4 is adjusted with respect to the round bar-shaped main body 3.

The top level indicator 4 fitted to the round bar-shaped main body 3 of the top pointer body 1 bites into the peripheral surface of the shaft portion 3a of the round bar-shaped main body 3 by the elastic force of the peripheral wall portion 7. Since it is pressed in such a way, it is held at the height at that time. At this time, the tips of the stopper portions 10a and 10b provided by the pair of picking plate portions 9a and 9b are separated from each other. Therefore, when the pair of picking plate portions 9a and 9b are sandwiched between the fingertips, the peripheral wall portion 7 is elastically deformed by the opening / closing hinge portion 7a until the stopper portions 10a and 10b are in contact with each other. It opens together with 9b, the front end side wall portions 11a and 11b, and the reinforcing flange portions 12a and 12b, and the biting convex portions 8a and 8b of the peripheral wall portion 7 are separated from the peripheral surface of the shaft portion 3a of the round bar-shaped main body 3. Therefore, the top level indicator 4 is moved up and down with respect to the shaft portion 3a of the round bar-shaped main body 3 with the fingertips sandwiching the pair of picking plate portions 9a and 9b, and the top level of the top level indicator 4 is raised. The display surface 13 is adjusted to a height corresponding to a predetermined top level L. After that, when the fingertips sandwiching the pair of picking plate portions 9a and 9b are released, the peripheral wall portion 7 is closed by the elastic return force. After moving, the convex portions 8a and 8b bite into each other so as to bite into the peripheral surface of the shaft portion 3a of the round bar-shaped main body 3, and the top level indicator 4 is the circle of the top pointer body 1 at the adjusted height. It is fixed to the rod-shaped main body 3.

Even when the top level indicator 4 is externally fitted and held on the shaft portion 3a of the round bar-shaped main body 3 of the top pointer main body 1 before use, the pair of picking plate portions 9a and 9b are used as described above. With the peripheral wall portion 7 being opened by sandwiching it with a fingertip, the top level indicator 4 is fitted from the small diameter insertion shaft portion 6 side of the round bar-shaped main body 3 to the shaft portion 3a of the round bar-shaped main body 3, and the height is appropriate. Now, the fingertips can be separated from the pair of picking plate portions 9a and 9b, and the top level indicator 4 can be externally fitted and held on the shaft portion 3a of the round bar-shaped main body 3 of the top pointer main body 1.

When attaching the mounting bracket 2 to the vertical vertical bar among the reinforcing bars arranged in the concrete placing space of the floor slab, as shown in FIG. 2, the top level indicator 4 is attached to the shaft portion 3a in advance. The shaft portion 3a of the top pointer body 1 fitted to the outside is inserted from the side with the small diameter insertion shaft portion 6 from the second large diameter through hole 25 of the mounting bracket 2 toward the second small diameter through hole 24. The small diameter insertion shaft portion 6 is press-fitted into the second small diameter through hole 24 to the limit where the step surface 3b abuts on the inner surface of the side plate portion 15b. As a result, not only the frictional force between the small diameter insertion shaft portion 6 and the second small diameter through hole 24, but also the protrusion 24a bites into the peripheral surface of the small diameter insertion shaft portion 6, so that the top pointer body 1 can be easily attached. It is fixed in a state where it does not come off from the metal fitting 2.

At this time, the peripheral surface of the shaft portion 3a of the round bar-shaped main body 3 protruding from the second large-diameter through hole 25 is adjacent to the outer surface of the side plate portion 15a of the mounting bracket 2 having the second large-diameter through hole 25. If a ring-shaped insertion depth mark 28 along the circumferential direction is provided at the height, the small diameter insertion shaft portion 6 is inserted into the second small diameter through hole up to the limit where the step surface 3b abuts on the inner surface of the side plate portion 15a. The situation in which the 24 is completely press-fitted can be easily visually confirmed from the position of the insertion depth mark 28. It is desirable that the insertion depth marks 26 and 28 are formed by forming a ring-shaped continuous concave groove portion in the circumferential direction around the shaft portion 3a, but a method of winding a thin metal wire or a method of displaying with paint is used. It can also be carried out.

As shown in FIG. 2, the mounting bracket 2 to which the top pointer main body 1 is attached is covered with the mounting bracket 2 from the side on the vertical bar 29, and the reinforcing bars of the left and right side plate portions 15a and 15b are fitted. With the vertical bar 29 fitted in the recess 19, the fastening bolt 21 is screwed in, and the vertical bar 29 is sandwiched between the tip of the fastening bolt 21 and the inner end of the reinforcing bar fitting recess 19 of the mounting bracket 2. Fix it. In this case, the vertical streaks 29 and the round bar-shaped main body 3 of the top pointer body 1 are oriented in parallel with each other, and the top pointer body 1 is fixed in a state of standing vertically from the mounting bracket 2. The height of the top level indicator 4 can be adjusted with respect to the rod-shaped main body 3 as described above.

As described above, when the top pointer of the present invention is attached to the horizontal reinforcing bar 27 or the vertical bar 29 and used, the surface of the cast concrete is finished according to the top level display surface 13 of the top level display tool 4. Immediately after that, if the top pointer body 1 protruding from the surface of the placed concrete is pulled up strongly upward by grasping the pulling operation portion 5 at the upper end thereof, the small diameter insertion shaft portion 6 becomes the first mounting bracket 2. Since it comes out upward from the small diameter through hole 22 or the second small diameter through hole 24, if the entire top end pointer body 1 is pulled out upward as it is, the top end pointer body 1 detached from the mounting bracket 2 is taken out from the cast concrete layer. Can be done. Further, when the concrete supply pipe is caught in the top pointer main body 1 standing upward from the mounting bracket 2 of the top pointer attached to the area before concrete placement, it is shown by a virtual line in FIG. As described above, the round bar-shaped main body 3 of the top pointer main body 1 receives a lateral external force acting from the concrete supply pipe or the like and bends against the elasticity, so that the concrete supply pipe or the like can be easily removed. When the round bar-shaped main body 3 of the crown pointer main body 1 becomes free, the round bar-shaped main body 3 returns to the original vertical standing posture by the elastic return force.

In carrying out the present invention, the top level indicator 4 may have any structure, and is not limited to the structure shown in the examples. Further, as the mounting bracket 2, a pair of side plate portions (top plate portion 14 and bottom plate portion 17) facing each other in the vertical direction when attached to the horizontally oriented reinforcing bar 27 and up and down when attached to the vertical vertical reinforcing bar 29. A pair of side plate portions 15a and 15b facing in the direction are provided, and both of these two sets of side plate portions are provided with the large-diameter through holes 23, 25 and the small-diameter through holes 22, 24. It may be a mounting bracket that can be attached to only one of the horizontal reinforcing bar 27 and the vertical vertical reinforcing bar 29. Further, the small diameter through holes 22 and 24 of the mounting bracket 4 project from the inner peripheral surface thereof and bite into the peripheral surface of the small diameter insertion shaft portion 6 of the round bar-shaped main body 3 press-fitted into the small diameter through holes 22 and 24. Although the protrusions 22a and 24a are provided, the shape and the number of the protrusions 22a and 24a in the circumferential direction are not limited to the illustrated embodiment.

The crown pointer of the present invention can be used as an effective means for displaying the surface of the concrete layer to be cast, that is, the finish level of the crown when constructing a floor slab (slab) from reinforced concrete.

1 Top pointer body 2 Mounting bracket 3 Round bar-shaped body 3a Shaft part 4 Top level indicator 5 Pull-out operation part 6 Small diameter insertion shaft part 7 Peripheral wall part 7a Opening / closing hinge part 8a, 8b Biting convex part 9a, 9b Picking plate part 10a, 10b Stopper part 11a, 11b Front end side wall part 12a, 12b Reinforcing collar part Top end level display surface 13
13 Top level display surface 14 Top plate part 15a, 15b Left and right side plate parts 19 Reinforcing bar fitting recess 21 Fastening bolt 22 First small diameter through hole 23 First large diameter through hole 24 Second small diameter through hole 25 Second large diameter through Holes 26, 28 Insertion depth mark 27 Horizontal rebar 29 Vertical rebar

Claims (3)

It is a top pointer consisting of a top pointer body and a mounting bracket for attaching the top pointer body to the reinforcing bar, and the height of the top pointer body is changed with respect to the round bar-shaped body and this round bar-shaped body. It is composed of a top-level indicator that fits freely on the outside, and the round bar-shaped body consists of a pull-out operation part provided at the upper end and a small-diameter insertion shaft part provided at the lower end, and the whole thereof is made of elastic synthetic resin. The mounting bracket is integrally molded from the material, and the mounting bracket is provided with a large-diameter through hole into which the round bar-shaped main body can be inserted and removed in the upper plate portion of the pair of side plate portions facing each other in the vertical direction. Is provided with a small-diameter through hole that allows the small-diameter insertion shaft portion of the round bar-shaped main body to be press-fitted and pulled out against elasticity at a position concentric with the large-diameter through hole, and the round bar-shaped main body is directed downward into the large-diameter through hole. When the small-diameter insertion shaft portion at the lower end is press-fitted into the small-diameter through hole, the round bar-shaped main body has the strength to stand up against the mounting bracket and when it receives a lateral external force, the round bar-shaped main body of the round bar-shaped main body. In the top pointer, which has the flexibility that the part that rises upward from the mounting bracket can bend against elasticity.
The mounting bracket is provided with a pair of side plate portions facing vertically when mounted on a horizontally oriented reinforcing bar and a pair of side plate portions facing vertically when mounted on a vertical vertical reinforcing bar. A crown pointer provided with the large-diameter through-hole and the small-diameter through-hole on both of these two sets of side plate portions . When the stepped surface at the upper end of the small-diameter insertion shaft portion of the round bar-shaped main body abuts on the inner surface of the lower plate portion having the small-diameter through hole, the outer surface of the upper plate portion having the large-diameter through hole is formed. The crown pointer according to claim 1, wherein an insertion depth mark along the circumferential direction is provided at an adjacent height . The small-diameter through hole of the mounting bracket is integrally formed with a protrusion that protrudes from the inner peripheral surface and bites into the peripheral surface of the small-diameter insertion shaft portion of the round bar-shaped main body that is press-fitted into the small-diameter through hole. The crown pointer according to 1 or 2.

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