JP6464069B2 - Templates, template sets and reinforcement methods - Google Patents

Description

  The present invention relates to a template used for bar arrangement, a template set, and a bar arrangement method using the same.

  In order to shorten the work period and reduce the construction cost when constructing a structure, pillars and beams are pre-manufactured as precast concrete members (hereinafter referred to as PCa members) at the factory and transported to the construction site for joining and assembly Is used.

  The PCa member is joined by, for example, connecting a reinforcing bar protruding from the PCa member and a reinforcing bar of a member to be joined by a sleeve. In such a method, the alignment of these reinforcing bars is important. For example, when a column made of a PCa member is joined to a foundation beam of a cast-in-place concrete, it is important how to fix the reinforcing bars (column main bars) of the foundation beam of the cast-in-place concrete and secure the placement accuracy. In addition, in order to further shorten the construction period, there is a case where a bar arrangement method is used in which the foundation beam is grounded and united and suspended, but in that case, it must be fixed according to the bar arrangement procedure. .

  As a method of improving the placement accuracy of such connecting reinforcing bars (column main reinforcing bars), the reinforcing bars are fixedly placed on a rod made of a single pipe or an angle member, and then the other reinforcing bars such as the main reinforcing bars of the foundation beam are used. There is a way to rebar. On the other hand, there is also a method in which other reinforcing bars are set first, connecting reinforcing bars are arranged later, and are fixed by an angle frame or a template for subsequent construction. Patent Document 1 describes an example of a template used for fixing a reinforcing bar.

Japanese Utility Model Publication No. 3-130855

  In the former method, there is a drawback in that it is difficult to arrange the reinforcing bars in the post-construction due to hindrances and the like. For example, when installing a grounded foundation beam reinforcing bar, the anchors and reinforcing bars previously placed interfere with each other and the installation itself cannot be performed. In the latter method, the above problems are improved. For example, when fixing a reinforcing bar for connection using a template, it is difficult to fix the inner reinforcing bar after fixing the position of the outer reinforcing bar first. The workability becomes worse, and the reaction force necessary for fixing cannot be easily obtained. Therefore, in the latter case, it is difficult to ensure the placement accuracy of the connecting reinforcing bars.

  The present invention has been made in view of the above problems, and it is an object of the present invention to provide a template or the like that can improve workability during bar arrangement and to realize a simple fixing method using them.

  1st invention for achieving the objective mentioned above is a template used for arrangement | positioning of a reinforcement, Comprising: The opening for inserting the said reinforcement is formed in the inner side and the outer side of the plane of a board | plate material, At least in the said opening of an inner side A tube projecting from the plane of the plate material is provided, and the projecting end of the tube serving as the opening end of the inner opening is on the same side of the outer opening as the projecting end of the tube Rather, the template is located at a position far from the plane of the plate.

In the template, a tube projecting from the plane of the plate material is provided in the opening on the outside, and the tube provided in the opening on the inside and the outside projects on the same side with respect to the plane of the plate material, It is desirable that the protruding end of the tubular body is located farther from the plane of the plate member than the protruding end of the outer tubular body that is the opening end of the outer opening.
The template preferably has a hole used for placing concrete.
Moreover, it is desirable that the template has an attachment portion for attaching a fixture used for fixing the template.

  2nd invention is a template set by a pair of template used for arrangement | positioning of a reinforcing bar, Comprising: One template is a template of 1st invention, The opening of said one template inserts one end of the said reinforcing bar The other template has a pair of plates arranged at intervals, and an opening for inserting the other end of the reinforcing bar is formed inside and outside the plane of the one plate. Is a template set characterized by

It is desirable that a hole for placing concrete is provided in the plane of one of the plate members.
It is also desirable that a hole for placing concrete is provided in the plane of the other plate member, and the hole of one plate member includes the hole of the other plate member in the plane.

  The third invention is a step (a) in which reinforcing bars are arranged inside and outside, and the template according to the first invention is moved to the inside from the protruding end of the tubular body provided in the opening inside the template. And (b) inserting one end of the outer reinforcing bar into the outer opening after inserting one end of the reinforcing bar.

It is desirable to include a step (c) of attaching a fixture to the template attachment portion and fixing the template to a surrounding frame with the fixture.
Further, in the step (a), there is a pair of plate members arranged at intervals, and an opening for inserting the other end of the reinforcing bar is formed inside and outside the plane of the one plate member. It is also desirable that the other end of the inner and outer reinforcing bars be inserted into the inner and outer openings of the other template.
Here, it is desirable that a hole for placing concrete is provided in the plane of one of the plate members.
It is also desirable that a hole for placing concrete is provided in the plane of the other plate member, and the hole of one plate member includes the hole of the other plate member in the plane.

  By using the template of the first invention and sequentially inserting the upper end of the reinforcing bar from the inner reinforcing bar to the outer reinforcing bar into the opening of the template, the reinforcing bar can be positioned easily. For example, after positioning the outer reinforcing bar, do not insert the hand inside it to position the reinforcing bar, and the inner reinforcing bar already inserted into the tube serves as a guide, and the template is moved to Since the work of inserting the reinforcing bars into the openings becomes easier, the workability is remarkably improved as compared with the case where all the reinforcing bars are inserted into the openings of the template at one time. The template is simple and lightweight, and the positioning accuracy of the reinforcing bars can be sufficiently secured by positioning with the template.

  Moreover, in the template of 1st invention, the insertion operation of a reinforcing bar can be divided in steps according to a construction characteristic by providing a tubular body in the opening inside and outside according to the difference in the projection length. Furthermore, by providing a hole in the center of the template, it is possible to suitably place concrete from above the template. In addition, by providing a hole for attaching a fixing tool to the template, the template can be fixed to a surrounding frame or the like using a fixing tool such as a lever hoist. Templates and mounts can be removed and reused after placing concrete, so there is no waste.

  Moreover, the positioning accuracy of the reinforcing bars is further improved by using another template made of upper and lower plate members arranged at intervals and positioning both ends of the reinforcing bars. Moreover, this template itself can be made to function as a spacer, and the cover of other reinforcing bars, such as the beam main reinforcement of the foundation beam arranged on the said template, can also be ensured. In addition, it is possible to suitably place the concrete using the holes of the upper and lower plate members, and the concrete is easy to go around because these holes are in an inclusion relationship.

  By using these templates to place the bars as described above, the placement accuracy of the reinforcing bars can be sufficiently secured, and the process can be greatly shortened compared to the case where the same placement accuracy is ensured by the conventional method. , Can reduce the construction cost.

  According to the present invention, it is possible to provide a template or the like that can improve workability at the time of bar arrangement, and to realize a simple fixing method using them.

The figure which shows the outline of upper template 1 Perspective view of upper template 1 The figure which shows the outline | summary of the lower template 15 Perspective view of the lower template 15 Diagram showing the bar arrangement method Diagram showing the bar arrangement method Diagram showing the bar arrangement method Diagram showing the bar arrangement method Diagram showing the placement of concrete 41

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(1. Template)
First, a template according to an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a base beam is arranged using a template set of a pair of templates (upper template and lower template) described below. The method will be described later.

  FIG. 1 is a diagram showing an outline of the upper template 1. FIG. 1A is a top view of the upper template 1, and FIG. 1B is a cross-sectional view of the upper template 1 taken along line AA in FIG. FIG. 2 is a perspective view of the upper template 1 as viewed from the bottom side.

  The upper template 1 is composed of a steel plate 3, a sheath tube 7, and the like. The steel plate 3 is a plate material having a substantially rectangular (square) outer periphery, and a hole 9 for placing concrete in the center is formed. The hole 9 has a substantially square shape, but is not limited thereto, and may have a substantially circular shape. Further, holes 11 (attachment portions) used for attaching a fixture for fixing the upper template 1 are formed at the four corners of the steel plate 3. It is also possible to provide a handle (not shown) for carrying the upper template 1 on the outer periphery of the steel plate 3.

  A plurality of openings 5 are formed around the hole 9. The opening 5 is for inserting a reinforcing bar and includes openings 5a to 5c. The opening 5a is on the inner side in the plane, and the openings 5b and 5c are formed on the outer side.

  Each opening 5 a to 5 c is provided with a sheath tube 7 (7 a to 7 c) that is a tubular body that protrudes on the same side (lower surface side) with respect to the plane of the steel plate 3. The sheath pipes 7a to 7c are attached to the inner peripheral surfaces of the openings 5a to 5c by welding or the like.

  The length in which each sheath tube 7a-7c protrudes from the plane of the steel plate 3 becomes longer as it goes inward. That is, the protruding length of the inner sheath tube 7a is longer than that of the outer sheath tubes 7b and 7c, and the protruding end of the sheath tube 7a (the opening end of the opening 5a) is the protruding end of the sheath tubes 7b and 7c (the openings 5b and 5c). It is below the opening end) and is further away from the plane of the steel plate 3.

  As shown in FIG. 2, when the sheath tubes 7b and 7c are compared, the projecting length of the sheath tube 7b is longer than that of the sheath tube 7c, and the projecting end of the sheath tube 7b is the projecting end of the sheath tube 7c. It is in a position farther from the plane of the steel plate 3 than the end.

  FIG. 3 is a diagram showing an outline of the lower template 15. 3A is a top view of the lower template 15, and FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A. FIG. 4 is a perspective view of the lower template 15 as viewed from the top.

  The lower template 15 is configured by arranging an upper steel plate 17 and a lower steel plate 19 with a spacing member 21 spaced from each other. The upper steel plate 17 and the lower steel plate 19 are plate materials having an outer periphery that is substantially rectangular (square), and the central portions and four corners of the four sides are connected and integrated by a spacing member 21. A channel material is used as the spacing member 21, but is not limited thereto.

  In the upper steel plate 17, a concrete placing hole 25 is formed at the center, and a plurality of openings 23 for inserting reinforcing bars are formed around the hole 25. The opening 23 includes openings 23 a to 23 c and corresponds to the positions of the openings 5 a to 5 c of the upper template 1, respectively. The opening 23a is on the inner side in the plane, and the openings 23b and 23c are formed on the outer side.

  A concrete placing hole 27 is formed at the center of the lower steel plate 19. The hole 25 of the upper steel plate 17 and the hole 27 of the lower steel plate 19 are in a positional relationship in which the hole 25 includes the hole 27 in a plane. In this example, the hole 25 and the hole 27 are both substantially square, the length of one side is larger in the hole 25, and the hole 27 is in a positional relationship rotated 45 degrees in the plane with respect to the hole 25.

(2. Bar arrangement method)
Next, a bar arrangement method using the upper template 1 and the lower template 15 (template set) will be described. In the present embodiment, an example will be described in which a foundation beam is constructed on a pile head after a PC ring is covered with a PC ring and reinforced by a capping pile method.

  As shown in FIG. 5, in this embodiment, the pile heads of left and right piles (not shown) placed in the ground are reinforced by the PC ring 33, and the lower part is first bridged between the PC rings 33. A template 15 is installed. Although illustration is omitted, in the case where the fixing stripe protrudes upward from the PC ring 33 and this fixing stripe interferes with the lower template 15, a hole for inserting the fixing stripe is provided in the lower template 15 in advance. Keep it.

  After the installation of the lower template 15, as shown in FIG. 6 (a), the horizontal beam main bar 37 and the vertical column main bar 39 of the foundation beam are arranged. In the figure, the beam main bar 37 and the column main bar 39 are shown in a simplified manner for explanation. In the present embodiment, the prefabricated beam main bar 37 is placed on the lower template 15 and arranged first, and then the column main bar 39 is arranged. At this time, the lower template 15 functions as a spacer for ensuring the covering of the lower beam main reinforcement 37. The column main bar 39 is used for connection with the reinforcing bar of the PCa member.

  FIG. 6B is a top view of the lower template 15 (the PC ring 33 is not shown). As shown in FIG. 6B, the column main bars 39 are arranged in two steps on the inside and outside of the plane. .

  The inner column main reinforcement 39 a is arranged on the lower steel plate 19 with the lower end passing through the opening 23 a of the upper steel plate 17. The outer column main bars 39 b and 39 c are arranged on the lower steel plate 19 with the lower ends passing through the openings 23 b and 23 c of the upper steel plate 17. Thereby, the positioning of the lower ends of the inner and outer column main bars 39a to 39c is performed.

  Next, as shown in FIG. 7, a frame 40 is installed around the column main bar 39, the upper template 1 is lowered from above the column main bar 39, and the upper end of the inner column main bar 39a is first moved from the protruding end of the sheath tube 7a. Insert into opening 5a. As a result, the upper end of the inner column main reinforcement 39a is positioned.

  The upper template 1 is further lowered by using the inner column main reinforcement 39a as a guide, and the upper ends of the outer column main reinforcements 39b and 39c are moved as shown in FIG. 8 (a) and FIG. 8 (b) which is a top view of the upper template 1. It inserts into opening 5b, 5c from the protrusion end of sheath tube 7b, 7c. Thereby, positioning of the upper ends of the column main bars 39b and 39c is performed. Thereafter, the upper template 1 is fixed to the surrounding gantry 40 with a fixing tool such as a lever hoist 50.

  In the present embodiment, the protruding length of the sheath tube 7b is longer than that of the sheath tube 7c. Therefore, in the process of lowering the upper template 1, the upper end of the column main muscle 39b is first moved from the protruding end of the sheath tube 7b to the opening 5b. After the insertion, the upper end of the columnar main bar 39c is inserted into the opening 5c from the protruding end of the sheath tube 7c.

  In this embodiment, the hook of the tip of the lever hoist 50 attached to the gantry 40 is hooked in the hole 11 of the upper template 1, so that the position adjustment and fixing of the upper template 1 can be performed by the tension of the lever hoist 50.

  After the bar arrangement as described above, a formwork (not shown) is assembled and concrete 41 is placed as shown in FIG. At this time, concrete 41 is poured from the holes 9 of the upper template 1, and the concrete 41 is placed around the column main bars 39. Since the hole 25 of the upper steel plate 17 includes the hole 27 including the hole 27 of the lower steel plate 19, the concrete 41 is easily circulated even at the bottom. The concrete 41 is cast to a position lower than the protruding end of the sheath tube 7a, and the upper template 1 can be removed and diverted. The gantry 40 can be removed and diverted in the same manner.

  The column main bar 39 protruding upward from the concrete 41 is connected to the reinforcing bar of the PCa member (not shown) on the upper side by a sleeve, and the column part of the structure is constructed. Since the column main bar 39 is arranged at an accurate position by the upper template 1 and the lower template 15, the connection with the reinforcing bar of the PCa member can be performed reliably.

  Thus, according to the present embodiment, the upper template 1 is used, and the upper ends of the upper template 1 are sequentially inserted into the outer tube main bars 39b and 39c into the sheath tubes 7a to 7c of the upper template 1. In addition, it is possible to easily position the upper ends of the column main bars 39a to 39c. For example, after positioning the outer rebar, the hand is not inserted into the rebar to position the rebar, and the inner column main bar 39a inserted into the sheath 7a serves as a guide, and the upper template 1 is Since the work of inserting the column main bars 39b and 39c into the other sheath tubes 7b and 7c is facilitated, the workability is remarkably improved as compared with the case where all the reinforcing bars are inserted into the template openings at once. The upper template 1 is simple and lightweight, and positioning accuracy of the column main bars 39a to 39c can be sufficiently secured by positioning with the upper template 1.

  Moreover, in the upper template 1, by providing the sheath pipes 7a to 7c in the inner and outer openings 5a to 5c, the insertion work of the column main bars 39a to 39c can be divided in stages according to the construction characteristics due to the difference in the protruding length. it can. Furthermore, by providing the hole 9 at the center of the upper template 1, the concrete 41 can be suitably placed from above the upper template 1. In addition, by providing the upper template 1 with a hole 11 for attaching a fixing tool such as the lever hoist 50, the upper template 1 can be fixed to the surrounding base 40 using the fixing tool. It is possible to secure the safety at the time of placing the concrete by using the gantry 40, and the upper template 1 and the gantry 40 can be removed and diverted after the concrete 41 is placed, so there is no waste.

  Further, by using the lower template 15 composed of the upper and lower steel plates 17 and 19 arranged at intervals, and positioning the lower ends of the column main bars 39a to 39c, the column main bars 39a after the beam main bars 37 of the foundation beam are arranged. Even when ˜39c is arranged, the arrangement accuracy is further improved. Further, by allowing the lower template 15 itself to function as a spacer, it is possible to ensure the covering of the beam main reinforcement 37 of the foundation beam.

  In addition, it is possible to suitably place the concrete 41 using the holes 25 and 27 of the upper steel plate 17 and the lower steel plate 19, and the concrete 41 is formed by the inclusion relationship between these holes 25 and 27. Easy to wrap around. Note that the shapes and positional relationships of the holes 25 and 27 are not limited to those described above, and it is sufficient that the holes 25 include the holes 27. For example, the holes 25 and 27 may be substantially circular, and the diameter of the hole 25 may be larger than the hole 27.

  In the present embodiment, the placement accuracy of the columnar reinforcing bars 39 can be sufficiently ensured by arranging the bars using the templates 1 and 15 as described above, and the same degree of placement accuracy can be secured by the conventional method. Compared to the case, the process can be greatly shortened and the construction cost can be reduced.

  However, the present invention is not limited to this. For example, in the present embodiment, the lower template 15 is installed on the PC ring 33. However, the PC ring 33 is not essential, and the reinforcing bars can be positioned by using the templates 1 and 15 of the present invention when constructing various structures. . Further, it is possible to arrange the column main bars 39 before the beam main bars 37 which are other reinforcing bars.

  Further, the shapes of the upper template 1 and the lower template 15 are not limited to those described above. For example, the arrangement and number of the openings 5 of the upper template 1 and the openings 23 of the lower template 15 are not limited to those described above, and correspond to the position and quantity of reinforcing bars to be arranged. For example, in the case where the column main bars 39 are arranged in three or more stages inside and outside, it is possible to provide the openings 5 and the sheath tube 7 in three or more stages inside and outside according to this. Further, if the fixture can be attached, an attachment portion other than the hole 11 may be provided in the upper template 1.

  In the present embodiment, the upper template 1 is provided with the three types of length of the sheath tube 7, but the present invention is not limited to this. For example, the length of the sheath tube 7 may be two types, the protruding length of the inner sheath tube 7 may be increased, and the outer sheath tube 7 may be shortened. It is also possible to omit the outer sheath tube 7. In any case, the position of the protruding end (opening end) of the sheath tube 7 of the inner opening 5 only needs to be farther from the plane of the upper template 1 than the opening end of the outer opening 5.

  In this embodiment, both the upper template 1 and the lower template 15 are used. However, the lower end of the column main bar 39 is positioned by another method without using the lower template 15, and the upper end of the column main bar 39 is used by the upper template 1. It is also possible to place the bars after positioning. Conversely, the lower end of the column main bar 39 may be positioned using the lower template 15, and the upper end of the column main bar 39 may be positioned by another method without using the upper template 1.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

1; upper template 3; steel plates 5, 5a, 5b, 5c, 23, 23a, 23b, 23c; openings 7, 7a, 7b, 7c; sheath tubes 9, 11, 25, 27; hole 15; lower template 17; Steel plate 19; Lower steel plate 21; Spacing member 37; Beam main bars 39, 39a, 39b; Column main bars 40; Base 41; Concrete 50; Lever hoist

Claims (12)

A template used for reinforcement,
Openings for inserting reinforcing bars are formed inside and outside the plane of the plate material,
At least the inner opening is provided with a tube projecting from the plane of the plate,
The protruding end of the tubular body, which is the opening end of the inner opening,
The template, wherein the outer opening is located farther from the plane of the plate than the opening end on the same side as the protruding end of the tubular body. A tube projecting from the plane of the plate material is provided in the opening on the outside,
The tube provided in the opening on the inside and outside protrudes on the same side with respect to the plane of the plate,
The protruding end of the inner tube is
2. The template according to claim 1, wherein the template is located farther from a plane of the plate member than a protruding end of the outer tubular body that is an opening end of the outer opening.   3. The template according to claim 1, further comprising a hole used for placing concrete.   The template according to any one of claims 1 to 3, further comprising an attachment portion for attaching a fixture used for fixing the template. A template set with a pair of templates used for reinforcement,
One template is
The template according to any one of claims 1 to 4, wherein the opening of the one template is for inserting one end of a reinforcing bar,
The other template is
Having a pair of plates spaced apart,
The template set characterized by the opening for inserting the other end of the said reinforcing bar formed in the inner side and the outer side of the plane of one said board | plate material.   The template set according to claim 5, wherein a hole for placing concrete is provided in a plane of one of the plate members.   7. A hole for placing concrete is provided in a plane of the other plate member, and the hole of one plate member includes the hole of the other plate member in the plane. The template set described. Arranging the reinforcing bars inside and outside (a);
The template according to any one of claims 1 to 4 is moved, and after inserting one end of the reinforcing bar inside from the protruding end of the tubular body provided in the opening inside the template, the outside opening (B) inserting one end of the outer reinforcing bar into
A bar arrangement method comprising the steps of: The template according to claim 4 is used as the template,
9. The bar arrangement method according to claim 8, further comprising a step (c) of attaching a fixture to the template attachment portion and fixing the template using the fixture. In the step (a),
Using another template having an opening for inserting the other end of the reinforcing bar into the inner side and the outer side of the plane of one of the plate members, having a pair of plate members arranged at intervals,
10. The bar arrangement method according to claim 8, wherein the other ends of the inner and outer reinforcing bars are inserted into the inner and outer openings of the other template.   11. The bar arrangement method according to claim 10, wherein a hole for placing concrete is provided on a plane of the one plate member.   12. A hole for placing concrete is provided in a plane of the other plate member, and the hole of one plate member includes the hole of the other plate member in the plane. The bar arrangement method described.

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