JP4390272B2 - Rebar thickness adjuster - Google Patents

Description

    The present invention relates to all fields related to the technology capable of accurately and easily managing the covering thickness of a reinforced concrete structure, and manufactures spacer metal fittings capable of regulating the covering thickness. In addition to the field of sales, from the field of construction and construction that adopts it, to the field to provide and sell equipment and tools necessary for metal fitting manufacturing, to those materials, machinery and parts, etc. Necessary materials such as wood, stone, various fibers, plastics, various metal materials, etc., electronic components incorporated in them, control-related equipment integrated with them, various measuring instruments, Fields generally referred to as industrial machinery, such as the field of power machines that move equipment and appliances, the electric power that is the energy, the energy that is the energy source, the field of oil, and more Garbage generated by testing and researching these facilities and equipment, fields related to their display, sales, import and export, general results, and results of their use, and equipment and equipment used to build them There are no technical fields that are not related to the fields related to the collection and transportation of waste, the recycling field that efficiently recycles these wastes, and other new fields that cannot be envisaged at this time.

(Viewpoints)
When constructing a reinforced concrete structure, reinforcement work and formwork work, depending on the structure part, for example, in the pillar part, after the rebar is assembled, the formwork is assembled, and in the case of floor slabs and beam parts, the mold After assembling the frame, it becomes a procedure to assemble the rebar, and at the wall part, the work procedure is changed before and after, such as assembling the rebar after assembling the inner formwork and then assembling the outer formwork, or Since it is repeated alternately, it is not only necessary for the bar arrangement worker and the formwork worker to always work with close connection, but in some cases it may be necessary to do it in parallel in some cases It was difficult to rationalize the construction procedures easily.

    On the other hand, recent construction standards for concrete structures tend to restrict the use of synthetic resin moldings for each part in consideration of pollution countermeasures and the finite nature of petroleum resources. Administrative guidance has been given to prevent the use of synthetic resin molded products as much as possible for spacer metal fittings that regulate the concrete covering thickness that has been used, especially construction of public facilities. According to the manual, the use of synthetic resin molded products as spacer fittings is almost prohibited.

(Conventional technology)
The spacer metal fittings that have been generally used so far are, for example, those made of synthetic resin, such as the invention disclosed in Japanese Patent Laid-Open No. 2000-328719, or shown in Japanese Patent Laid-Open No. 11-50598. As in the present invention, various types of synthetic resin molded products have been developed, and many of them have already been put into practical use. Civil engineering facilities such as bridges, sluices, slopes, tunnels, etc., even though they can be used for structures such as ramen structures, wall structures, beamless structures, curved structures and other special concrete structures In the construction work, it becomes impossible to use due to insufficient strength, and metal spacer fittings that can provide sufficient strength as a special order must be prepared. There was a need to align the various spacer metal fittings.
(1) Japanese Unexamined Patent Publication No. 2000-328719 (2) Japanese Unexamined Patent Publication No. 11-50598

(Awareness of problems)
As described above, conventional synthetic resin spacers may become unusable depending on the construction site, and even at sites where they can be used, a large number of installations are required due to the strength of the materials, and they must be installed. It has the disadvantage that it took a lot of time and labor to work, and the cost was high, and it had troubled formworkers, and it was possible to work in parallel with the bar arrangement work. The fact that the strength strength is guaranteed and the mounting work is improved, and the fact that there is a long-awaited offer to the market of spacer fittings that are not synthetic resin molded products, which has become a recent trend, is overlooked. I didn't go.

(Object of invention)
Therefore, the present invention not only realizes the parallel work with the bar arrangement work, but also can secure sufficient strength and improve the mounting workability to the reinforcing bar, and has become a recent trend of synthetic resin molded products. Judging from the fact that it is not possible to realize non-spacer metal fittings, we quickly started developing and researching it, and as a result of repeating trial and error over many years and many trial manufactures and experiments, this time finally a new structure In the following, the construction of the steel bar thickness adjusting tool will be described in detail together with an embodiment representative of the present invention shown in the drawings.

(Structure of the invention)
As clearly understood from the embodiments representing the present invention shown in the drawings, the covering thickness adjusting tool for reinforcing bars included in the present invention basically includes the following configuration.
That is, a vertical support portion that is formed in one or a plurality of bar shapes that can be brought into contact with each other over two or more horizontal stripes that are vertically adjacent to each other, and that can regulate back-and-forth swing when mounted, and the vertical type When it is formed on the upper end side of the support part and formed in a hook-like shape that can be hung on the horizontal stripes at each of a plurality of locations separated from each other by a sufficient distance to avoid interference with at least one vertical stripe. A horizontal support portion that can regulate left and right swinging of the vertical support portion, and at the lower end side of the vertical support portion, a deformed ring integrally formed on the lower end of the vertical support portion, and inserted into the deformed ring, It is made up of a cone with shafts carved in multiple places along the longitudinal direction, which can be engaged and disengaged by rotating the angle, and a cone extended from the base end, and the covering thickness can be adjusted stepwise the thickness regulating portion fog was as to be a length corresponding to the thickness of overburden required by fitted to Only those Te and the configuration of the wearing reinforcing bar and gist a thickness adjuster.

When the covering thickness adjusting tool for reinforcing bars having this basic configuration is shown as a more specific configuration, it is formed in a single bar shape that can be contacted over two or more horizontal bars adjacent to each other in the vertical direction, A vertical support portion that can restrict back-and-forth swinging when mounted, and an upper end side of the vertical support portion, separated by a left-right distance sufficient to avoid interference with at least one vertical streak Each of the two places has a horizontal support portion that is formed in a hook shape that can be suspended on the same horizontal horizontal stripe, and that can regulate left and right swinging when mounted, and on the lower end side of the vertical support portion, An irregular ring integrally formed at the lower end of the vertical support portion, and irregular fitting grooves which can be engaged and disengaged by inserting into the irregular ring and rotating by a predetermined angle are engraved at a plurality of locations along the longitudinal direction. It is made up of a cone that is made by extending the shaft from the base end, and the covering thickness can be adjusted step by step It can be said that a thickness adjuster suffer reinforcing bar which was made by providing a thickness regulating portion fog was as to be a length corresponding to the thickness of overburden required by so that fitted.

More specifically, a vertical support portion that is formed into a single bar-like shape that can be brought into contact with two or more horizontal stripes adjacent to each other in the vertical direction and that can be controlled to swing back and forth when mounted, and Side-vertical V-shaped with the upper end side of the vertical support part bent to either the left or right side, and with the downward tip end parallel to the vertical support part, the curved part is inclined to the back side at a predetermined angle Or, by bending in a reverse letter shape, a hook-shaped part that can be hung on the same horizontal line is formed at each of two locations separated by a sufficient distance from the left and right to wrap around the back side of at least one vertical line And a horizontal support portion that is capable of restricting left and right swinging when mounted, and a deformed ring integrally formed on the lower end of the vertical support portion on the lower end side of the vertical support portion, and the deformed ring A specially shaped fitting groove that can be engaged / disengaged and operated by being inserted into and rotated by a predetermined angle in the longitudinal direction A shaft which is engraved on a plurality of locations consists of a cone which is stretched from the base end, fog and so may be a length corresponding to the thickness of overburden required by fitted so as to allow adjusting the thickness suffer stepwise along It includes a reinforcing bar cover thickness adjuster provided with a thickness regulating portion.

    As described above, according to the rebar covering thickness adjuster of the present invention, when mounted on the rebar, the vertical support portion that can restrict back-and-forth swing and the horizontal support portion that can restrict left-right swing are provided. Therefore, the horizontal support portion is attached to the horizontal stripe so as not to interfere with the vertical stripe, and the vertical support portion is suspended so as to abut on two or more adjacent horizontal widths. Can be quickly and easily placed in the desired location of the reinforcing bar without using mounting brackets, etc., and the vertical support part on the opposite side of the horizontal support part attached to the horizontal bars Either one of the appropriate position on the lower end side or the appropriate position such as the shaft part of the cover thickness control part can be easily and quickly fixed securely to the appropriate position of the reinforcing bar corresponding to the back with a binding wire. Metal parts such as steel are used for the part, horizontal support part, and part of the covering thickness control part. In addition, the cover thickness control part is made of mortar and does not contain any synthetic resin parts.Also, high rigidity can be ensured, so compared to conventional synthetic resin spacers. This reduces the number of installations and makes the installation work much more efficient.

    Moreover, the covering thickness regulating part is formed of a shaft and a cone, and has a stepless expansion / contraction and adjustment function by a combination of a male screw and a female screw at an appropriate position, and can be connected to the lower end of the vertical support part. Or, it is possible to form a plurality of fitting grooves along the shaft and connect to the lower end of the vertical support part as having stepwise expansion and contraction and adjustment functions, or a plurality of types of shaft lengths. Whether it is integrated with the lower end of the vertical support part by aligning things, aligning multiple cone lengths, or aligning shaft lengths and cone lengths. Or, it can be prepared as a separate body from the vertical support part so that it can be welded and integrated, or it can be by any means. Dimension setting that responds to thickness It becomes to exhibit a significant effect that it is possible to implement a smooth mounting operation is facilitated.

In implementing the present invention having the configuration as described above, the best or desirable mode will be described.
The vertical support portion is in contact with at least two horizontal bars that are adjacent to each other when mounted on the reinforcing bar, and has a function of restricting the movement of the reinforcing bar covering thickness adjuster in the front-rear direction with respect to the reinforcing bar. It must be made of a material and shape that can connect and support the horizontal support part on the upper end side and the covering thickness regulating part on the lower end side with sufficient rigidity. It should be made of materials that can be managed and handled in the same way as reinforced concrete at each stage of use and disposal, and should preferably be made of steel bars, steel plates, steel pipes, etc., and also lighter and cheaper. In consideration of this, the horizontal support part and the shaft part of the covering thickness regulating part can be formed integrally, and other metal materials such as special steel and light metals can be selected. It is.

    When the horizontal support is attached to a reinforcing bar, the horizontal support part is suspended at a plurality of horizontal bars at a distance from each other in order to avoid interference with at least one vertical bar, and the covering thickness adjustment for the reinforcing bar is performed. Material and shape that can hold the vertical support part and the covering thickness restricting part at the lower end of the vertical support part with sufficient rigidity. In consideration of the simple shape, the upper end side of the vertical support portion is bent, and two hooks are formed around the back side of at least one vertical bar. It is also possible to form a portion, and the rearward downward bending angle is set to 30 to 60 °, preferably around 45 °, so that it can be applied to a plurality of types of horizontal stripes having different diameters. Can be.

    The covering thickness regulating part fulfills the function of allowing the covering thickness dimension to be regulated as designed according to the required covering thickness in the vicinity of the lower end side of the vertical support part when it is arranged and mounted on the reinforcing bar. It must have a structure that can be appropriately set to the required cover thickness dimension for the lower end side of the mold support part. More specifically, the vertical support part and the horizontal support are provided for the lower end of the vertical support part. A female screw is directly embedded in the base end of an integral shaft of a predetermined length that is integrally formed in an L shape with a posture substantially orthogonal to a virtual plane formed by the portion, and has a male screw at the tip, or a female screw The various cones projecting from the various lengths of the screwing shafts with holes formed therein can be screwed and mounted so that they can be exchanged and detached.

    Also, it is composed of a rod-shaped shaft or cone, and several types of shaft lengths corresponding to different covering thicknesses are arranged, several types of cone lengths are arranged, or both the shaft length and cone length are different. The size of the vertical support section and the horizontal support section are substantially the same as the virtual plane formed by the vertical support section and the lower support section with respect to the lower end of the vertical support section. It is assumed that it is welded and integrated in an L-shape with an orthogonal orientation, or is prepared as a separate body from the vertical support so that it can be welded and integrated, etc. It can be realized by adopting an optimum one among several means.

    Furthermore, it consists of a nut integrally formed at the lower end of the vertical support and a cone with a male screw that can be screwed to the nut. In addition, a deformed ring integrally formed at the lower end of the vertical support portion, and inserted into the deformed ring , And a cone formed by extending a shaft that is engraved at a plurality of locations along the longitudinal direction with deformed fitting grooves that can be engaged and disengaged by rotating a predetermined angle, and the covering thickness is stepwise It is also possible to fit it so that it can be adjusted.

    The shaft serves to support the cone so that a predetermined covering thickness can be regulated at an appropriate position on the lower end side of the vertical support portion, and can be formed integrally with the vertical support portion. It can be formed and removable, or it can be attached integrally by adjusting the covering thickness, and it must be made of a material that can be constructed, used and disposed of together with reinforced concrete. Considering the required strength, etc., it is desirable to manufacture from the same steel rod, steel plate, steel pipe, etc. as the vertical support part, but stainless steel or other special steel, etc. when weight reduction and rust prevention are important It is not impossible to use nonferrous metal such as aluminum or titanium alloy, and when welding to the vertical support portion, the material must be selected so as to be a combination of weldable materials.

The cone is supported by the shaft and its tip is covered and regulates the thickness.It comes into contact with the formwork and is positioned, and after the concrete is hardened and the formwork is removed, the tip part is not uncomfortable with the concrete wall. It must function to be exposed and must be formed from mortar, concrete or something similar in appearance and strength, and should be connected to the shaft with sufficient strength. In addition, the tip surface that contacts the mold should be a spherical shape or a dome shape instead of a flat surface, and a shape that can stably secure a desired covering thickness without being affected by a slight mounting angle. It is desirable to stabilize the suspended state when hanging on the reinforcing bar with a certain weight, and to be detachable from the shaft as necessary. Alternatively, a plurality of cones having different lengths can be manufactured, and a cone having a size that matches the required covering thickness can be selected and attached. It is possible to use various forms such as separating and forming the front end side into the base end of the cone and making it substantially detachable from the base end side shaft.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

    The perspective view which looked at the thickness adjustment tool for reinforcing bars of FIG. 1 from the front, the perspective view which looked at the thickness adjustment tool for reinforcing bars of FIG. 2 from the rear, the side view of the horizontal support part of FIG. 3, and FIG. The example shown in the perspective view of the reinforcing bar covering thickness adjusting tool in which the covering thickness regulating part is replaceable is formed in a single bar shape that can contact two or more horizontal bars 5 and 5 adjacent to each other in the vertical direction. The vertical support portion 2 and the upper end side of the vertical support portion 2 are separated from each other at two positions separated from each other by a sufficient distance to avoid interference with at least one vertical stripe 6. 5 and a horizontal support portion 3 formed in a hook shape that can be suspended from the vertical support portion 2. A covering thickness regulating portion 4 set to a length corresponding to the required covering thickness is provided on the lower end side of the vertical support portion 2. The typical example in the covering thickness adjusting tool for reinforcing bars included in this invention as what is provided is shown.

    The reinforcing bar covering thickness adjuster 1 is formed by appropriately bending the both ends of a round steel bar having a total length of about 700 mm and a diameter of about 7 mm, thereby forming a horizontal support 3 on the upper end of the vertical support 2. A shaft 41 of the covering thickness regulating portion 4 is formed on the lower end side, and a mortar cone 43 is screwed to the tip of the shaft 41.

    The vertical support part 2 is a portion of about 130 mm from the upper end of the round steel bar, and is bent into either a substantially inverted J shape, an inverted U shape or an inverted V shape on either side. Further, it is assumed that the horizontal support portion 3 having the left and right hook-shaped portions 31 and 31 is formed by bending the bent portion at a predetermined angle facing downward on the back side, and about 90 mm from the other end on the lower end side. Is substantially in a direction opposite to the horizontal support portion 3 with respect to a virtual plane formed from two left and right positions where the vertical support portion 2 and the flange-shaped portions 31 and 31 of the horizontal support portion 3 are arranged. The shaft 41 is bent so as to have a right-angled posture, and a male screw 42 is engraved in a predetermined range on the tip side as shown in FIG. 4 to form a part of the covering thickness regulating portion 4. To form.

    As shown in FIG. 2, the horizontal support 3 is spaced about 35 mm between the left and right saddle-shaped portions 31, 31, and the depth of the substantially inverted U-shaped bent portion is set to about 80 mm. The end of the round steel bar is shaped to have a substantially parallel posture with an interval of about 35 mm between the end of the round bar and the vertical support portion 2. As shown in FIG. 3, the bent portions of FIG. 3 are bent in a substantially reverse letter shape so as to be inclined at an angle of about 45 ° obliquely downward on the back surface side at the flange portions 31, 31. .

    The covering thickness regulating portion 4 includes a male screw 42 of a shaft portion 41 formed on the lower end side of the vertical support portion 2 and a cone 43 screwed to the male screw 42. The cone 43 is as shown in FIG. The mortar has a diameter of about 45 mm and a total length of about 45 mm, and its tip side is formed in a conical shape with its apex rounded into a spherical shape so that the overall shape is roughly a bullet shape. In the center of the end surface, a nut tube 44 with a female screw 45 is embedded and integrated so that the end of the female screw 45 is exposed to be flush with the other end. A plurality of types of cones 43 including nut pipes 44 having different overall length dimensions are prepared by projecting them concentrically by a predetermined length from the center.

    Furthermore, as shown in the perspective view of the covering thickness adjusting tool for reinforcing bars, a part of FIG. 5 is changed, the covering thickness regulating portion 4 is a nut fixed and integrated near the lower end of the vertical support portion 2 by welding. A shaft 41 having a predetermined length dimension in which a male screw is engraved from the distal end to the vicinity of the proximal end is screwed onto a cone 43 projecting concentrically from the center of the proximal end surface, and the shaft 41 is inserted through the nut 46. It is assumed that a locking nut 47 is screwed onto the screw.

    Further, as shown in the perspective view of the covering thickness restricting portion in which part of FIG. 6 is changed, the covering thickness restricting portion 4 is formed by forming circular circular hole edge portions facing each other at 180 ° in parallel straight lines. The deformed ring 48 with the mounting hole drilled is welded to an appropriate position on the lower end side of the vertical support portion 2, while the deformed ring 48 is mounted on the center of the base end surface of the cone 43 over a substantially entire length. It is formed in a cross-sectional shape that can be inserted almost in line with the hole, and can be rotated by about 90 ° and 180 ° in the circumferential direction at multiple locations at intervals of about 5 to 10 mm along the longitudinal direction. The shaft 41 formed by engraving the odd-shaped fitting groove 49 is formed so as to protrude concentrically.

    The example shown in the perspective view of the covering thickness adjusting tool for reinforcing bars in FIG. 7 and the side view of the covering thickness regulating portion for comparing the overall length dimensions in FIG. Each upper end separated by a left and right distance sufficient to avoid interference between the vertical support portions 2, 2 formed in a plurality of possible bar shapes and at least one vertical streak of each vertical support portion 2, 2 The present invention includes horizontal support portions 3 and 3 formed in the shape of hooks that can be suspended from the horizontal stripes, and a covering thickness regulating portion 4 is provided on the lower end side of the vertical support portion. The other Example in the covering thickness adjustment tool for reinforcing bars shown is shown.

    The reinforcing bar covering thickness adjuster 1 has a sandwiching angle of about 50 ° at the approximate center (about 430 mm from one end) of a round steel bar having an overall length of about 860 mm and an outer diameter of about 7 mm or a deformed bar having an outermost diameter of about 10 mm. The left and right vertical support portions 2 and 2 are integrally formed by bending the front and rear in a V-shape when viewed from the front, and a portion about 150 mm from the tip of each vertical support portion 2 and 2 is formed. By forming a substantially reverse J-shape, reverse U-shape, or reverse-letter shape toward the back side, the hook-shaped portions 31, 31 are formed at two positions separated by about 250 mm from left to right. The horizontal support portion 3 is formed, and the left and right vertical support portions 2 and 2 as well as the left and right vertical support portions 2 and 2 are formed at the upper corner of the apex portion of the V-shape in front view where the left and right vertical support portions 2 and 2 intersect Posture and arrangement substantially perpendicular to the virtual plane formed by the bowl-shaped portions 31 and 31 Shaft 41 of the thickness regulating section 4 fog so that is has become what is integrated by welding.

    As shown in FIG. 8, the covering thickness regulating portion 4 is a round bar steel in which the vertical support portions 2 and 2 and the horizontal support portion 3 are formed from the center of the base end surface of the cone 43 having a total length of about 45 mm and an outer diameter of about 45 mm. A made of the same bar material as any of the deformed reinforcing bars, and having a total length of about 95 mm as a result of protruding shafts 41, 41, 41 having different total lengths of about 50 mm, 80 mm, 100 mm, etc. Prepare A, B, and C with different dimensions such as B with a total length of about 125 mm, C with a total length of about 145 mm, and select one according to the covering thickness at each site. 7 can be used after being welded and integrated with the downward apex portion between the vertical support portions 2 and 2 in FIG.

(Operation of Example)
The reinforcing bar thickness adjusting tool 1 of the present invention having the above-described configuration has a shape as shown in FIGS. 1 to 4, so that the attached reinforcing bar thickness adjusting tool shown in FIG. As shown in the figure, the left and right saddle-shaped portions 31 of the horizontal support portion 3 are connected to one horizontal stripe 5 located on the upper side of the horizontal stripes 5 and 5 or the hoop muscles which are vertically adjacent to each other with an interval of about 300 mm. 31 can be suspended, and the rear side of the vertical support portion 2 at the appropriate position on the lower end side can be brought into contact with the horizontal stripe 5 that is disposed on the lower side, and can be suspended. The portion 2 comes into contact with the upper and lower horizontal stripes 5 and 5, and in combination with the weight of the cone 43, the covering thickness restricting portion 4 is restricted from swinging back and forth. 31 and 31 regulate the swinging of the covering thickness regulating portion 4 in the left-right direction. Thus, the hooked state is stably maintained, and thereafter, a binding wire (an annealed iron wire) 7 is used to tie the portion near the lower end of the vertical support portion 2 crossing the horizontal bar 5 arranged at the lower side to cover the reinforcing bar. The thickness adjuster 1 can be fixed to the reinforcing bars 5 and 5.

    As shown in FIG. 3, the left and right hook-shaped portions 31 of the horizontal support portion 3 are bent backward and downward at an angle of about 45 ° on both the left and right sides. As shown in FIG. 4, it is possible to suspend and install the transverse muscles 5 having a plurality of types of diameters in substantially the same posture, and the cone 43 of the covering thickness restricting portion 4 has a full length as shown in FIG. It is possible to easily and freely change and adjust the cover thickness setting according to the mounting location by attaching and detaching and exchanging with a different one.

    In the case shown in FIG. 5, it is possible to adjust the screwed state of the male screw of the shaft 41 with respect to the nut 46 by loosening the retaining nut 47, and various covering thickness dimensions can be achieved by the single covering thickness regulating portion 4. It is possible to change and adjust in a stepless manner, and in the case of the cover thickness regulating portion 4 shown in FIG. 6, the shaft 41 is inserted into the mounting hole of the deformed ring 48 to obtain a desired cover thickness. Any one of the irregularly shaped fitting grooves 49 corresponding to the position is made to coincide with the irregularly shaped ring 48, and the cover corresponding to each mounting position is operated by only rotating about 90 ° in the direction of either arrow in the figure. It can be changed and adjusted step by step according to the thickness dimension.

    Furthermore, as shown in the perspective view of the rebar covering thickness adjusting tool mounted in FIG. 10, the rebar covering thickness adjusting tool 1 is 1 between the left and right saddle-shaped portions 31, 31 of the horizontal support portion 3. Since the vertical stripes 6 of the book are set to be spaced apart from each other and can be hung with the middle part of the horizontal support part 3 wrapping around the back of the vertical stripes 6, it can be freely installed anywhere. As shown in the figure, it is possible to reliably restrict the sliding movement in the left-right direction by arranging the vertical stripe 6 between the left and right hook-shaped portions 31, 31 as shown in the figure. Become.

    Further, as shown in FIG. 8, the reinforcing bar covering thickness adjusting tool 1 shown in FIG. 7 has a covering thickness for each mounting position from among the covering thickness regulating portions 4, 4,. The covering thickness regulating part 4 having a suitable dimension can be selected, and it can be manufactured by welding and integrated with the lower vertical corners of the vertical support parts 2 and 2, and the covering for the reinforcing steel bar shown in FIG. As shown in the perspective view of the thickness adjuster, left and right hook-shaped portions 31, 31 are respectively attached to the upper reinforcing bar 5 among the two horizontal bars 5, 5 adjacent to the top and bottom or the hoop bars. Since the vertical support portions 2 and 2 are attached to the upper and lower horizontal stripes 5 and 5 in contact with each other, the vertical support portions 2 and 2 are combined with the weight of the cone 43. Either the back and forth swing is restricted, and the horizontal support 3 restricts the swing in the left and right direction, and the mounting posture is stably maintained. The one that can be fixed to firmly rebar by tying square vertical one location intersecting the lower lateral stripes 5 of the support unit 2 only in the binding wire 7.

(Effect of Example)
In addition to the features described in the section of the effect of the present invention, the covering thickness adjuster 1 for a reinforcing bar according to the embodiment having the above-described configuration includes a vertical support portion 2, a horizontal support portion 3, and a covering thickness regulating portion. Since the four shaft 41 parts are manufactured by bending only one round steel bar, it is possible to reduce the number of parts by eliminating the assembly work such as welding, and to manufacture more economically. In addition, each of the left and right hook-shaped portions 31, 31 of the horizontal support portion 3 has a substantially reverse letter-shape that is rearward and downward at an angle of about 45 ° within a range of 30 ° to 60 °. As shown in FIG. 3, it is possible to suspend and mount the transverse muscles 5 of various diameters in substantially the same posture without any work for adjusting the posture. Securing the desired mounting posture only by the hanging operation Can have the feature that will be capable to significantly improve the efficiency of mounting operation of the reinforcing bar.

    By providing a mortar cone 43 at the tip of the covering thickness regulating portion 4, it is possible to obtain a good appearance by exposing only the mortar portion on the wall surface after placing the concrete, as shown in FIG. As described above, a plurality of types of covering thickness restricting portions 4, 4,... Having different overall lengths are prepared, and can be attached to and detached from the shaft 41 integrally formed on the lower end side of the vertical support portion 2 via a screw structure. Then, it becomes possible to select and install the covering thickness regulating portions 4, 4,... Appropriately according to the required covering thickness, and it is possible to quickly cope with the covering thickness dimension for each mounting location. An effect is obtained in which the number and weight of surplus parts that are brought into the mounting site and brought back without being used can be significantly reduced.

    Further, by setting the covering thickness regulating portion 4 as shown in FIGS. 5 and 6, stepwise or stepless advance / retreat adjustment of the cone 43 according to the covering thickness dimension without changing any parts. It is possible to improve the work efficiency by reducing the complicated work of bringing in the parts required for each cover thickness adjustment, and the rebar cover thickness adjuster 1 shown in FIG. By selecting and welding one full length dimension according to the covering thickness dimension of the mounting location from the multiple types of covering thickness restricting portions 4, 4,... Shown in FIG. There is an advantage that it is not necessary to have a large amount of stock of the covering thickness adjusting tools 1, 1,..., And it is possible to assemble the required number each time, and as shown in FIG. The work is also equivalent to the work having the one vertical support portion 2. Since the distance between the left and right saddle-shaped portions 31, 31 of the horizontal support portion 3 is sufficiently secured, the vertical stripe 6 (not shown) is arranged between the left and right saddle-shaped portions 31, 31. Therefore, it is possible to obtain the convenience that the mounting and workability substantially equivalent to those of the reinforcing bar covering thickness adjusting tool 1 shown in FIGS. 1 and 2 can be secured.

(Conclusion)
As described above, the cover thickness adjuster for reinforcing bars according to the present invention can achieve the intended purpose even more thanks to its new structure, and is easy to manufacture and compared with conventional synthetic resin spacer brackets. As a result, the unit price can be kept low, and the rigidity can be increased to provide sufficient strength to support the concrete formwork even with a small number of installations. Since the work efficiency of rebar construction and formwork can be greatly improved, the rationalization of construction will surely reduce costs and shorten the construction period. However, it is expected to become widely used and popularized in the recent construction industry, where there is a strong demand for cost reductions such as labor costs.

The drawings show some typical embodiments embodying the technical idea of the covering thickness adjusting tool for reinforcing bars of the present invention.
It is a perspective view which shows the front side shape of the covering thickness adjustment tool for reinforcing bars. It is a perspective view which shows the back side shape of the covering thickness adjustment tool for reinforcing bars. It is a side view which shows the bowl-shaped part of a horizontal type | mold support part. It is a perspective view which shows the attachment or detachment structure of the covering thickness control part. It is a perspective view which shows the covering thickness control part which enabled the stepless adjustment. It is a perspective view which shows the covering thickness control part which can be adjusted in steps. It is a perspective view which shows the cover thickness adjustment tool for reinforcing bars for front V shape. It is a side view which compares and shows the different length of various covering thickness control parts. It is a perspective view which shows the covering thickness adjusting tool for reinforcing bars with which it attached to the parallel horizontal muscle. It is a perspective view which shows the covering thickness adjustment tool for reinforcing bars which carried around and installed the vertical reinforcement. It is a perspective view which shows the mounting state of the cover thickness adjustment tool for reinforcing bars of a front V shape.

Explanation of symbols

1 Cover thickness adjuster for reinforcing bars 2 Vertical support 3 Horizontal support
31 Same bowl-shaped part 4 Cover thickness control part
41 Same shaft
42 Male thread
43 Same cone
44 Same nut tube
45 Same female thread
46 Same nut
47 Same locking nut
48 Same-shaped ring
49 Same-shaped fitting groove 5 Transverse (Hoop)
6 Longitudinal bars 7 Tying wire (Annealed iron wire)

Claims (3)

A vertical support portion that is formed in one or more bar shapes that can be brought into contact with each other over two or more horizontal stripes adjacent to each other in the vertical direction, and that can be controlled to swing back and forth when mounted, and the vertical support portion Are formed in the shape of a hook that can be hung from the horizontal bar at each of a plurality of positions separated by a horizontal distance sufficient to avoid interference with at least one vertical bar. A horizontal support portion that can regulate swinging, and a deformed ring integrally formed at the lower end side of the vertical support portion and a deformed ring that is inserted into the deformed ring at a lower end side of the vertical support portion, It consists of a cone with shafts carved in multiple places along the longitudinal direction, which can be engaged and disengaged and operated by moving them, and the cone thickness can be adjusted stepwise. provided thickness regulating portion fog was as to be a length corresponding to the thickness of overburden required by fitted The thickness adjuster suffer reinforcing bar, characterized in that the shall. A vertical support portion that is formed into a single bar-like shape that can be brought into contact with two or more horizontal stripes adjacent to each other in the vertical direction, and that can restrict back-and-forth swinging when mounted, and an upper end side of the vertical support portion In addition, it is formed in a hook shape that can be hung on the same horizontal horizontal stripe at two locations separated by a horizontal distance sufficient to avoid interference with at least one vertical stripe, and the left and right when mounted. A horizontal support portion that can regulate swinging, and a deformed ring integrally formed at the lower end side of the vertical support portion and a deformed ring that is inserted into the deformed ring at a lower end side of the vertical support portion, It consists of a cone with shafts carved in multiple places along the longitudinal direction, which can be engaged and disengaged and operated by moving them, and the cone thickness can be adjusted stepwise. formed by providing a thickness regulating portion fog was as to be a length corresponding to the thickness of overburden required by fitted The thickness adjuster suffer reinforcing bar, characterized in that the as. A vertical support portion that is formed into a single bar-like shape that can be brought into contact with two or more horizontal stripes adjacent to each other in the vertical direction, and that can restrict back-and-forth swinging when mounted, and an upper end side of the vertical support portion Is bent to either the left or right side, and the curved portion is inclined to the back side at a predetermined angle with the downward tip side parallel to the vertical support part. By bending, a saddle-shaped part that can be suspended on the same horizontal line is formed in each of two places separated by a horizontal distance sufficient to wrap around the back side of at least one vertical line, and A horizontal support part that can regulate swinging, and a deformed ring integrally formed at the lower end of the vertical support part and a deformed ring that is inserted into the deformed ring at a lower end side of the vertical support part. Deformation fitting grooves that can be engaged / disengaged and operated by moving are engraved at multiple locations along the longitudinal direction. It consists of a cone which is extended shaft from the proximal end, formed by providing a thickness stepwise adjustable to as thickness regulating unit fog was as to be a length corresponding to the thickness of overburden required by fitting the fog A covering thickness adjusting tool for reinforcing steel, characterized by being made.

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