JP5271878B2 - Auxiliary tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary tool for setting an upper surface level which can simply fix a fixing member to a vertical reinforcement, and can inhibit displacement with respect to the vertical reinforcement. <P>SOLUTION: The auxiliary tool 1 for setting the upper surface level includes: a rod 10 which comprises a first level indication portion 13 for indicating a concrete placing level, and a second level indication portion 12a for indicating a level material placing level; and the fixing member 20 for fixing the rod 10 to the arranged reinforcement. The fixing member 20 comprises: an elastically-deformable rod holding portion 22 for holding the rod 10 in a vertically and relatively movable manner; and an elastically-deformable vertical reinforcement holding portion 21 having an opening 21a which is formed in such a shape that its inside diameter is equal to or smaller than the diameter of the vertical reinforcement T and holds the vertical reinforcement T. By providing a reinforcing rib which continuously extends to the side of the rod holding portion 22 from the side of the vertical reinforcement holding portion 21 at both sides of outer surfaces of the vertical reinforcement holding portion 21 and the rod holding portion 22, the enlargement of the inside diameter of the vertical reinforcement holding portion 21 is suppressed when the rod 10 is held by the rod holding portion 22. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a top edge assisting tool for leveling the top edge surface of a building foundation structure.

  A foundation structure of a building is constructed by assembling a formwork for the foundation structure and placing concrete or the like inside the formwork. In general, this placing process is divided into two steps. First, concrete is cast so that it does not reach the planned top end position of the foundation structure, and after the concrete is hardened, the planned top end position is set. A level material (for example, concrete softened until it is nearly liquid) is cast. By placing this highly fluid level material on concrete, the top end face of the foundation structure is leveled.

  Conventionally, when placing concrete and a level material, the top end surface is leveled using a top end auxiliary tool as disclosed in Patent Document 1. The top edge assisting tool disclosed in Patent Document 1 adjusts and holds the bar material having a mark indicating the concrete placement level and the level material placement level, the clamping portion for fixing the reinforcing bar, and the vertical position of the bar material. And a fixing member having a possible holding portion. This top edge assisting tool is used in a state in which a bar and a fixing member are assembled, and in a state in which the fixing member is fixed to a vertical line arranged in the foundation structure, the bar for the fixing member is used. The vertical position of can be adjusted. The leveling of the top end face of the foundation structure is performed by placing concrete and a level material on the basis of each mark of the bar adjusted to an arbitrary position.

JP 2005-048510 A

  By the way, such a top edge assisting tool needs to be firmly fixed to the vertical bars so as not to cause a vertical displacement with respect to the fixed vertical bars. In the top edge extension assisting tool of Patent Document 1, the clamping part of the fixing member is a ratchet tooth that bends integrally with the one side arcuate part that abuts on the outer peripheral part of the vertical bar, and the other side arc that abuts on the outer peripheral part of the vertical bar It consists of a ratchet claw that bends integrally with the part. And in the state where the vertical streak is arranged between the one side arc part and the other side arc part, the ratchet teeth and the ratchet claw are engaged and the vertical state is firmly sandwiched by narrowing the engagement state. Can do. However, although the top edge assisting tool of Patent Document 1 can firmly fix the fixing member to the vertical bars of the foundation structure, the fixing operation for the vertical bars is complicated.

  The present invention has been made in view of such a conventional situation, and an object of the present invention is to provide a ceiling member that can easily fix a fixing member to a vertical stripe and can suppress a positional deviation with respect to the vertical stripe. The object is to provide an edge assisting tool.

  In order to achieve the above-mentioned object, the top edge assisting tool according to claim 1 is a top edge assisting tool which is fixed to the reinforcing bar and sets the concrete placing level and the level material placing level. A bar having a first level indicating unit indicating a setting level and a second level indicating unit indicating a level material placing level, and a fixing member for fixing the bar to the bar arrangement, the fixing member having an opening. And an elastically deformable bar holding part that holds the bar so as to be relatively movable in the vertical direction, and has an opening and an inner diameter that is the same as the vertical bar diameter or narrower than the vertical bar diameter. A reinforcing bar that can be elastically deformed, and that continuously extends from the vertical bar holding part side to the bar holding part side on both sides of the outer surface of the vertical bar holding part and the bar holding part. By providing ribs for the front, Which comprises suppressing the spread of the inner diameter of the longitudinal muscle holder when obtained by holding the bar.

  According to the above configuration, the vertical bar is pressed into the opening of the vertical bar holding part and the vertical bar is inserted into the vertical bar holding part. Specifically, the vertical bar is fitted while the opening width of the opening is expanded by elastic deformation. The fixing member can be fixed to the vertical streak by a simple operation. Further, the reinforcing ribs formed on both sides of the outer surface of the vertical bar holding part increase the restoring force after the elastic deformation of the vertical bar holding part. In particular, by forming the reinforcing rib so as to continuously extend from the vertical bar holding part side to the bar holding part side, the force applied to one side of the vertical bar holding part and the bar holding part through the reinforcing rib is the other Will act to the side. Specifically, when the vertical streak is fixed to the vertical bar holding part, if a force to expand the inner diameter of the vertical bar holding part is applied to the vertical bar holding part, the force is applied to the bar holding part through the reinforcing rib. It acts as a force to narrow the inner diameter of the. Therefore, in the state where the bar is attached to the bar holding part and the bar holding part and the bar are in contact with each other and the inner diameter of the bar holding part cannot be reduced any more, the inner diameter of the vertical bar holding part should be increased. The reaction force against the force is greater. The increase in the reaction force further enhances the restoring force after elastic deformation, allows the vertical bars to be firmly sandwiched by the vertical bar holding part, and the inner diameter of the vertical bar holding part by elastic deformation during fixing operation to the vertical bar. It can suppress that it will be in the state where the diameter expanded. Therefore, the position shift of the fixing member with respect to the vertical stripe after being fixed to the vertical stripe can be suppressed.

  The top end support tool according to claim 2 is the invention according to claim 1, wherein the fixing member has an upper portion of a horizontal bar combined with the vertical bar in a state where the fixing member is fixed to the vertical bar. The contact part which contact | abuts to is formed, It is characterized by the above-mentioned.

  According to the above configuration, in a state in which the fixing member is fixed to the vertical stripe, the contact portion is in contact with the upper portion of the horizontal stripe combined with the vertical stripe, so that the position of the fixing member in the downward direction with respect to the vertical stripe is determined. Misalignment can be prevented.

  According to a third aspect of the present invention, in the invention according to the first or second aspect, the screw groove is provided at a position below the first level indicating portion and the second level indicating portion in the bar. And an engaging portion that engages with the thread groove of the rod material is formed on the inner surface of the rod material holding portion, and the rod material can be relatively moved in the vertical direction by rotating relative to the fixing member. A fitting portion for fitting with a height adjusting jig for adjusting the height of the bar is formed at the tip of the bar.

According to the above configuration, the height (vertical position) of the bar can be adjusted using the height adjusting jig. Therefore, the height of the bar can be adjusted more easily and accurately.
In the invention according to any one of claims 1 to 3, the bar material holding part is formed above the vertical bar holding part. It is characterized by being.

  According to the above configuration, since the bar holding part is located on the upper side, the length of the bar is shorter than when the bar holding part and the vertical bar holding part are formed at the same vertical position. can do. Further, when the same length of bar is used, the upward adjustment allowance can be further increased.

  According to the top edge assisting tool of the present invention, it is possible to easily fix the fixing member to the vertical stripe and to suppress the positional deviation with respect to the vertical stripe.

The perspective view of the top end assistance tool of embodiment. (A) is a top view of a bar, (b) is a front view of the bar, and (c) is a side view of the bar. (A) is a top view of a fixing member, (b) is a front view of the fixing member, and (c) is a side view of the fixing member. (A), (b) is a perspective view which shows the example of a change of a fixing member.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a top end assistance tool according to the present invention will be described with reference to the drawings.
FIG. 1 shows a state in which the top edge assisting tool 1 of the present embodiment is attached to a reinforcing bar (longitudinal muscle T and lateral muscle Y). As shown in FIG. 1, the top edge assisting tool 1 includes a bar 10 and a fixing member 20 that fixes the bar 10 to the vertical stripe T. The rod 10 and the fixing member 20 are formed of a resin material such as polypropylene, polyacetal, ABS resin, polycarbonate, and polyamide. In the top edge assisting tool of the present invention, “up and down” refers to the direction when the top edge assisting tool is attached to the reinforcing bar (vertical line T) as shown in FIG.

  As shown in FIGS. 2A to 2C, the bar 10 is a member having a round bar as a basic shape, and the upper end of the bar 10 functions as a second level indicating unit indicating the leveling level of the level member. The lower end is a second end 12b. A fitting portion 14 formed as a cross-shaped groove is provided on the top of the first end portion 12a, and a height adjusting jig (not shown) can be fitted therein.

  On the circumferential surface of the bar 10, a pair of substantially triangular plate-shaped first level indicating portions 13 are projected from a position that is a predetermined distance below the first end portion 12a. The first level indicating unit 13 indicates the concrete placement level, and the formation position of the first level indicating unit 13 in the bar 10, that is, the length from the first end 12 a to the first level indicating unit 13. The thickness is equal to the thickness of the level material to be placed on the concrete.

A spiral thread groove 11 is formed on the peripheral surface of the bar 10 from the lower side of the first level indicating portion 13 to the second end portion 12b.
As shown in FIGS. 3 (a) to 3 (c), the fixing member 20 has a shape in which the vertical bar holding part 21 and the bar holding part 22, both of which are substantially cylindrical, are integrally connected at their outer surfaces. , Molded integrally with resin. As shown in FIG. 3A, the vertical bar holding portion 21 is a cylindrical body having a C-shaped cross section, and has a vertical bar side opening 21a formed by cutting out a part of the peripheral wall in the axial direction. . The inner diameter of the vertical bar holding portion 21 is formed so as to be the same as the diameter of the vertical bar T to be attached or smaller than the diameter of the vertical bar T. The reinforcing bar used for the foundation structure is a reinforcing bar having a diameter of 10, 13, 16 mm, etc., and the vertical bar holding portion 21 of the fixing member 20 is formed in a size corresponding to each of these diameters. .

  The opening width of the narrowest portion of the longitudinal muscle side opening 21a is set to a width that allows the longitudinal muscle T to be inserted while elastically deforming the longitudinal muscle holding portion 21 from the longitudinal muscle side opening 21a side into the longitudinal muscle holding portion 21. Although set, an insertion guide portion 21b whose opening width increases toward the tip is formed at the tip of the longitudinal muscle side opening 21a.

  As shown in FIG. 3A, the bar holding portion 22 is a cylindrical body having a C-shaped cross section like the fixing member 20, and a bar side opening formed by cutting out a part of the peripheral wall in the axial direction. 22a. The inner diameter of the bar holding part 22 is formed to be the same as the diameter of the part where the screw groove 11 of the bar 10 is formed or smaller than the diameter of the part where the screw groove 11 is formed. .

  The opening width of the narrowest part of the bar-side opening 22a is such that the bar 10 can be inserted into the bar-holding part 22 while elastically deforming the bar-holding part 22 from the bar-side opening 22a side. Although set, an insertion guide portion 22b whose opening width increases toward the tip is formed at the tip of the bar-side opening 22a. The bar holding part 22 is formed such that its axial length is longer than that of the vertical bar holding part 21.

  As shown in FIG. 3C, a protruding engagement portion 23 that engages with the thread groove 11 of the rod 10 is provided at the center of the inner surface of the rod holding portion 22. As shown in FIGS. 3A and 3B, a plate-like contact portion 24 extending in the opposite direction to the rod-side opening 22 a is provided on the outer surface of the rod-holding portion 22. A triangular plate-like support member 25 that supports the contact portion 24 is provided between the lower surface of the contact portion 24 and the outer surface of the bar holding portion 22.

  As shown in FIGS. 3A to 3C, the vertical bar holding part 21 and the bar holding part 22 are connected in a state where their openings are directed to the opposite sides. The bar holding part 22 is connected to the vertical bar holding part 21 with its lower end position shifted by a predetermined distance α in the axial direction, and when viewed from the bar side opening 22a side, each axis line Are connected in a state shifted by a predetermined distance β in a direction orthogonal to the axial direction. That is, the bar holding part 22 is located above the vertical bar holding part 21 by a predetermined distance α. Further, by connecting the vertical bar holding part 21 and the bar holding part 22 with the predetermined distance β shifted, a space for forming the contact part 24 and the support member 25 is formed on the outer surface of the bar holding part 22. It is secured at a position opposite to the bar side opening 22a.

  Further, as shown in FIGS. 3A to 3C, a pair of reinforcing ribs 26 are provided on both sides of the outer surfaces of the vertical bar holding portion 21 and the bar holding portion 22. Each reinforcing rib 26 extends in a direction perpendicular to the axis of the vertical bar holding part 21 and the bar holding part 22, and is continuously formed from the vertical bar side opening 21a to the bar side opening 22a.

Next, a method for leveling the top end surface of the foundation structure using the top end assisting tool 1 of this embodiment will be described.
First, the part of the bar 10 where the thread groove 11 is formed is inserted into the bar holding part 22 from the bar side opening 22a, and the engaging part 23 of the bar holding part 22 and the screw groove of the bar 10 are inserted. 11 is engaged. At this time, the bar 10 is allowed to be inserted into the bar holding part 22 by expanding the opening width of the bar side opening 22a by elastic deformation while being guided by the insertion guide part 22b of the bar holding part 22. At the same time, it is sandwiched between the bar holding parts 22. And the bar holding part 22 hold | maintains the bar 10 with the restoring force after the elastic deformation of the bar holding part 22, and the frictional force between the bar holding part 22 and the bar 10. The top end support tool 1 is used in a state in which the bar 10 and the fixing member 20 are combined as described above.

  Subsequently, as shown in FIG. 1, the top edge assisting tool 1 is attached to the vertical bars T in the foundation structure. First, the vertical stripe side opening 21 a of the vertical stripe holding portion 21 is pressed against the upper portion of the vertical stripe T to insert the vertical stripe T into the vertical stripe holding portion 21. At this time, the vertical streak T is allowed to be inserted into the vertical streak holding part 21 by expanding the opening width of the vertical streak side opening 21a by elastic deformation while being guided by the insertion guide part 21b of the vertical streak holding part 21. At the same time, it is sandwiched between the vertical stripe holding portions 21. The vertical bar holding unit 21 holds and fixes the vertical bar T by the restoring force after the elastic deformation of the vertical bar holding unit 21 and the frictional force between the vertical bar holding unit 21 and the vertical bar T. Furthermore, since the reinforcing ribs 26 are provided on the outer surface of the vertical bar holding part 21, the restoring force of the vertical bar holding part 21 is increased, and the vertical bar T can be firmly fixed.

  Here, in the present embodiment, the reinforcing ribs 26 are continuously formed from the vertical bar holding part 21 side to the bar holding part 22 side. As a result, the force for expanding the opening width of the vertical bar side opening 21a (the force for expanding the inner diameter of the vertical bar holding portion 21) through the reinforcing rib 26 is a force for narrowing the opening width of the bar side opening 22a. It acts as (force to narrow the inner diameter of the bar holding part). On the other hand, the force to increase the opening width of the bar side opening 22a (force to increase the inner diameter of the bar holding part 22) is the force to narrow the opening width of the bar side opening 22a (of the vertical bar holding part 21). Acting as a force to narrow the inner diameter). As a result, in a state where the bar 10 is already inserted into the bar holding part 22 and the bar holding part 22 and the bar 10 are in contact with each other and the opening width of the bar side opening 22a cannot be reduced, The reaction force with respect to the force which expands the opening width of the muscle side opening 21a becomes larger. Due to the increase of the reaction force, the restoring force after elastic deformation is further increased, and the vertical bars T sandwiched in the vertical bar holding part 21 can be held more firmly.

  Subsequently, the arrangement of the reinforcing bars 1 is performed by bringing a contact part 24 provided on the bar holding part 22 into contact with the upper part of the horizontal bar Y combined with the vertical bar T to which the top edge assisting tool 1 is attached. The installation of the top edge assisting tool 1 is completed. Note that by causing the contact portion 24 to contact the upper portion of the horizontal stripe Y, it is possible to prevent the downward displacement (sliding down) of the fixing member 20 with respect to the vertical stripe T.

  Thus, in a state where the top end support tool 1 is attached to the reinforcing bar, the operator rotates the bar 10 relative to the fixing member 20 and moves the bar 10 relative to the fixing member 20 in the vertical direction (vertical direction). Move. And the up-and-down position of the 1st level instruction | indication part 13 of the bar 10, and the 1st edge part 12a which is a 2nd level instruction | indication part, and the concrete placement level and level material placement level of a planned foundation structure The vertical position of the bar 10 is adjusted so as to be equal.

  At this time, it is also possible to adjust the vertical position of the bar 10 using a height adjusting jig. In other words, the height adjusting jig is fitted to the fitting portion 14 provided at the first end 12a of the bar 10 so that the height adjusting jig and the bar 10 can be rotated together. Alternatively, the vertical position of the bar 10 may be adjusted with reference to a scale or the like attached to the height adjusting jig.

  After the adjustment of the vertical position of the bar 10 is completed, concrete is placed in the formwork of the foundation structure using the first level indicating portion 13 of the bar 10 as a mark, and the second level after the concrete is placed. A level material is placed in the mold using the first end portion 12a as an indicator as a mark. Thereby, a foundation structure is formed in the height position which the top end surface schedules.

Next, operational effects in the present embodiment will be described below.
(1) The top edge assisting tool 1 of the present embodiment includes a bar 10 and a fixing member 20 that fixes the bar 10 to the reinforcing bar. The vertical bar holding portion 21 provided in the fixing member 20 has a vertical bar side opening 21a and has an inner diameter that is the same as the diameter of the vertical bar T to be mounted or smaller than the vertical bar T, and is elastically deformable. It is configured. Reinforcing ribs 26 that extend continuously from the vertical bar holding part 21 side to the bar holding part 22 side are provided on both sides of the outer surfaces of the vertical bar holding part 21 and the bar holding part 22.

  According to the above configuration, the vertical stripe T is pressed against the vertical stripe side opening 21a of the vertical stripe holding section 21 to insert the vertical stripe T into the vertical stripe holding section 21, specifically, the opening of the vertical stripe side opening 21a. The fixing member 20 can be fixed to the vertical stripe T by a simple operation of fitting the vertical stripe T while expanding the width by elastic deformation. Further, the reinforcing ribs 26 formed on both sides of the outer surface of the vertical bar holding part 21 enhance the restoring force of the vertical bar holding part 21 after elastic deformation. In particular, the reinforcing ribs 26 are formed so as to continuously extend from the vertical bar holding part 21 side to the bar holding part 22 side, so that one of the vertical bar holding part 21 and the bar holding part 22 is passed through the reinforcing rib 26. The force applied to the side acts on the other side. Specifically, when the vertical streak T is fixed to the vertical streak holding part 21 and a force for expanding the inner diameter of the vertical streak holding part 21 is applied to the vertical streak holding part 21, the force is applied to the reinforcing rib 26. It acts as a force to narrow the inner diameter of the bar holding part 22 through. Therefore, in a state where the bar 10 is attached to the bar holding part 22 and the bar holding part 22 and the bar 10 are in contact with each other and the inner diameter of the bar holding part 22 is not further reduced, the vertical bar holding part The reaction force with respect to the force to expand the inner diameter of 21 becomes larger. By increasing the reaction force, the restoring force after the elastic deformation is further increased, and the vertical muscle T can be firmly sandwiched by the vertical muscle holding portion 21, and the inner diameter of the vertical muscle holding portion 21 is increased by the elastic deformation during the fixing operation. It can suppress that it will be in the state where the diameter expanded. Therefore, it is possible to suppress the displacement of the fixing member 20 with respect to the vertical stripe T after being fixed to the vertical stripe T.

(2) The bar holding portion 22 of the fixing member 20 is formed with an abutting portion 24 that abuts the upper portion of the horizontal stripe Y combined with the vertical stripe T in a state where the fixing member 20 is fixed to the vertical stripe T. ing.
According to the above configuration, the abutment portion 24 abuts on the upper part of the horizontal stripe Y combined with the vertical stripe T, thereby preventing a downward displacement (slipping) of the fixing member 20 with respect to the vertical stripe T. be able to.

  (3) The thread groove 11 is formed in the rod member 10, and the engaging portion 23 that engages with the screw groove 11 of the rod member 10 is formed on the inner surface of the rod member holding portion 22 of the fixing member 20. It is configured to be relatively movable in the vertical direction by rotating relative to the fixed member 20.

  According to the above configuration, the vertical position of the bar 10 relative to the fixing member 20 can be adjusted steplessly. Therefore, the vertical position of the bar 10 can be accurately adjusted to an arbitrary position.

(4) The first end portion 12a of the bar 10 is formed with a fitting portion 14 that fits with a height adjusting jig that adjusts the vertical position (height) of the bar 10.
According to the above configuration, the vertical position of the bar 10 can be adjusted using the height adjusting jig. Therefore, the vertical position of the bar 10 can be adjusted more easily and accurately.

(5) The bar holding part 22 is formed so as to be positioned above the vertical bar holding part 21.
According to the said structure, since the bar holding part 22 exists in the upper part side, compared with the case where the bar holding part 22 and the vertical streak holding part 21 are formed in the same height position, the bar 10 Can be shortened. Moreover, when the bar 10 of the same length is used, the upward adjustment allowance can be further increased.

(6) The vertical streak holding portion 21 is formed of a cylindrical body having a C-shaped cross section.
The pinching portion (corresponding to the vertical bar holding portion 21) of the top edge assisting tool of Patent Document 1 has ratchet teeth and ratchet claws, but the configuration of the vertical bar holding portion 21 is compared with such a configuration. Very simple. Therefore, it is possible to manufacture the fixing member 20 with a mold having a simple structure, and thus the manufacturing cost of the top end auxiliary member 1 can be reduced. Moreover, since the structure is simple, the vertical stripe holding | maintenance part 21 can be formed smaller.

  Furthermore, in the structure of the clamping part of the said patent document 1, a space part is formed between a ratchet tooth, a ratchet nail | claw, and each side circular arc part. When such a space portion exists, the concrete does not enter the space portion at the time of placing concrete, and causes a hollow portion (cross-sectional defect) in the placed concrete. On the other hand, when the vertical bar holding portion 21 is formed of a cylindrical body having a C-shaped cross section, the space portion is not formed, and the occurrence of a cross-sectional defect in the placed concrete can be suppressed. .

  In addition, this embodiment can also be changed and embodied as follows. Moreover, it is also possible to change the said embodiment like the structure of the combination of the following modification example mutually.

  -In this embodiment, it was set as the structure which hold | maintains the bar material 10 so that an up-and-down movement is possible by the engagement relationship of the thread groove 11 of the bar material 10, and the engaging part 23 of the bar material holding | maintenance part 22. The configuration for holding the movable member vertically is not limited to this. For example, the bar 10 is held only by the restoring force after the elastic deformation of the bar holding part 22 and the frictional force between the bar holding part 22 and the bar 10 without providing the thread groove 11 and the engaging part 23. The bar 10 may be moved up and down by the operator pushing the bar 10 downward or pulling it upward. Further, a plurality of grooves that are continuous in the axial direction may be formed on the surface of the bar 10, and protrusions that engage with the grooves may be formed on the inner surface of the bar holding part 22. In this case, the vertical position of the bar 10 can be adjusted stepwise.

  -The 1st level instruction | indication part and the 2nd level instruction | indication part may be what kind of structure, if it can become a mark at the time of placing concrete and a level material. For example, the first level indicating unit 13 may be a bowl-shaped disk formed on the entire peripheral surface of the bar 10, or a similar circle may be formed on the first end 12a of the bar 10 as the second level indicating unit. A plate may be provided. Further, coloring is performed over a predetermined range from the first end portion 12a of the bar 10 to the lower side, the lower end of the colored portion is the first level indicating portion, and the upper end of the colored portion (first end portion 12a) is the second. It is good also as a level instruction | indication part.

  -The shape of the fitting part 14 may be any shape as long as it can be fitted to the height adjusting jig. For example, it may be a single-shaped groove or a polygonal groove such as a pentagonal shape or a hexagonal shape. Moreover, not only groove shape but the protrusion-shaped fitting part 14 may be sufficient. Note that the fitting portion 14 may not be provided.

  In the present embodiment, the bar 10 is held by the bar holding part 22 by pushing the bar 10 from the bar side opening 22a side of the bar holding part 22, but the shaft of the bar holding part 22 The bar 10 may be inserted into the bar holding part 22 from the direction. In this case, the opening width of the bar side opening 22a may be a width in which the bar holding part 22 cannot be inserted into the bar holding part 22 from the bar side opening 22a side.

  -The shape and number of the reinforcing ribs 26 are not particularly limited. For example, a plurality of reinforcing ribs 26 extending in the direction perpendicular to the axis of the bar holding portion 22 may be formed in the coaxial line direction, or a plurality of reinforcing ribs 26 may be combined to form a lattice shape as a whole. May be.

  The contact portion 24 may have any configuration as long as the contact portion 24 can be in contact with the upper portion of the horizontal stripe Y combined with the vertical stripe T. For example, as shown in FIG. 4A, the support member 25 may be omitted and only the contact portion 24 may be provided. Further, as shown in FIG. 4B, an L-shaped bar as the contact portion 24 may be connected to the vertical bar holding portion 21. A configuration in which the contact portion 24 is not provided may be employed.

  In the present embodiment, the vertical bar holding part 21 and the bar holding part 22 are connected so that the predetermined distance α and the predetermined distance β are shifted between the vertical bar holding part 21 and the bar holding part 22. However, as shown in FIGS. 4A and 4B, the vertical bar holding portion 21 and the bar holding portion 22 are connected in a state where the predetermined distance α and the predetermined distance β are zero. May be.

  In the present embodiment, the bar holding part 22 is formed longer than the vertical bar holding part 21 with respect to the axial length, but the vertical bar holding part 21 is formed longer than the bar holding part 22. Alternatively, both members may be formed to the same length.

  In the present embodiment, the fixing member 20 is fixed to the reinforcing bar in a state where the bar member 10 and the fixing member 20 are combined with each other. After fixing only 20 to the reinforcing bar, the bar 10 may be attached to the fixing member 20.

-The color of the top edge assisting tool 1 is arbitrary, and when molded with resin, the first level indicating unit 13 and the second level indicating unit may be conspicuous from concrete or the like.
Next, a technical idea that can be grasped from the above embodiment and another example will be described.

  (B) In the top edge assisting tool that is fixed to the bar arrangement and sets the concrete placement level and the level material placement level, the first level indicating portion indicating the concrete placement level and the level material placement level A bar member having a two-level indicating section and a fixing member for fixing the bar member to the reinforcing bar, the fixing member holding the bar member so as to be movable relative to each other in the vertical direction. And a vertical bar holding part that has an opening and an inner diameter that is the same as or smaller than the vertical bar diameter and that holds the vertical bar by elastic deformation, and the fixing member includes a fixing member. A top end support tool in which an abutting portion that abuts on an upper portion of a horizontal bar combined with the vertical bar is formed in a state of being fixed to the vertical bar.

T ... longitudinal streak, Y ... lateral streak, 1 ... top edge extension aid, 10 ... bar, 11 ... screw groove, 12a ... first end as second level indicating part, 12b ... second end, DESCRIPTION OF SYMBOLS 13 ... 1st level instruction | indication part, 14 ... Fitting part, 20 ... Fixing member, 21 ... Longitudinal streak holding part, 21a ... Longitudinal streak side opening, 21b ... Insertion guide part, 22 ... Bar material holding part, 22a ... Bar material Side opening, 22b ... insertion guide part, 23 ... engagement part, 24 ... contact part, 25 ... support member, 26 ... reinforcing rib.

Claims (4)

In the top end support tool that fixes the concrete placement level and level material placement level, fixed to the bar arrangement,
A bar having a first level indicating unit indicating a concrete placement level and a second level indicating unit indicating a level material placing level, and a fixing member for fixing the bar to the bar arrangement,
The fixing member has an opening and an elastically deformable bar holding part that holds the bar so as to be relatively movable in the vertical direction, and has an opening and an inner diameter that is the same as the vertical bar diameter or longer than the vertical bar diameter. It is narrowly formed and includes an elastically deformable vertical bar holding part that holds the vertical bar,
By providing reinforcing ribs continuously extending from the vertical bar holding part side to the bar holding part side on both sides of the outer surfaces of the vertical bar holding part and the bar holding part, the bar holding part has the A top-end projection assisting tool that suppresses the expansion of the inner diameter of the vertical bar holding portion when a bar is held. The top end support tool according to claim 1, wherein the fixing member is formed with an abutting portion that abuts on an upper portion of a horizontal bar combined with the vertical bar in a state where the fixing member is fixed to the vertical bar. . An engaging portion that forms a screw groove at a lower position of the first level indicating portion and the second level indicating portion in the bar, and engages with the screw groove of the bar on the inner surface of the bar holding portion. And making it relatively movable in the vertical direction by rotating the bar relative to the fixing member,
The top edge extending auxiliary tool according to claim 1 or 2, wherein a fitting portion for fitting with a height adjusting jig for adjusting the height of the bar is formed at the tip of the bar. . The top end support tool according to any one of claims 1 to 3, wherein the bar holding part is formed above the vertical bar holding part.

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