JPH07103578B2 - Positioning jig for sheath tube - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheath tube positioning jig suitably used for accurately positioning and holding a sheath tube when constructing a foundation.

[0002]

2. Description of the Related Art Conventionally, a foundation is constructed by a construction method in which a formwork is arranged and concrete is poured. In this construction method, while the concrete is uncured, the sheath tube is pushed into a predetermined position and the upper opening is embedded in a state that the top opening is aligned with the base top end. Insert in the protruding state. Then, when the upper structure is placed on the foundation and they are tightly bound by the anchor bolts, the grout material is injected into the gap in the sheath tube to fix the anchor bolts.

By the way, a positioning jig as shown in FIG. 4, for example, is used in order to bury the sheath tube at a correct position of the foundation with high accuracy.

The positioning jig 2 is mainly composed of a rectangular plate-shaped set plywood 3 having the same width as that of the foundation 1, and fixing wood pieces 4, 4 attached to the upper edge of the set plywood 3. Is configured as. The fixing wood pieces 4, 4
Is for temporarily fixing the positioning jig 2 to the form 5 after the positioning jig 2 is installed.

Screw holes are provided at predetermined positions of the set plywood 3, that is, at positions where the sheath tube is to be embedded when the set plywood 3 is installed at the corners and straight portions of the top end of the foundation 1. Has been. Screw holes are set plywood 3
The sheath tube is used for attaching and temporarily fixing the sheath tube on the lower side, and reference numeral 6 in the drawing is a sheath tube. Sheath tube 6
Is a bottomed cylindrical shape, and an anchor bolt 7 is inserted into the inside thereof with its upper part protruding, and the lower end portion of the anchor bolt 7 is fixed to the center of the bottom portion of the sheath tube 6. . A metal fitting 8 for setting is screwed onto the anchor bolt 7. The setting metal fitting 8 is a cylindrical screw-shaped metal fitting, and a female screw that is screwed into the anchor bolt 7 is provided inside and a male screw that is screwed into the screw hole of the set plywood 3 is provided outside. ing.

The outline of the method of burying the sheath tube 6 in the foundation 1 using the thus-positioned jig 2 will be explained. First, the formwork 5 is arranged on the site to set the planned construction area of the foundation 1. Determine.

On the other hand, in the set plywood 3 of the positioning jig 2, the anchor bolt 7 is previously inserted into the screw hole from the lower surface side thereof.
The sheath tube 6 is attached with the inserted
With the upper opening of the set plywood 3 in close contact with the lower surface of the set plywood 3, the set metal fitting 8 is screwed into the screw hole of the set plywood 3 to temporarily fix the set plywood 3 and the sheath tube 6. deep.

In this way, the positioning jig 2 to which the sheath tube 6 is temporarily fixed is arranged at a predetermined position (corner or straight portion) of the foundation construction planned area, and the positioning jig 2 is set on the horizontal plane which is the top end of the foundation 1. Temporarily fix the plywood 3 together. The temporary fixing is performed by driving the nails 9 from the fixing wood piece 4 toward the mold 5 substantially horizontally.

Next, concrete 10 is placed in the mold 5. Concrete 10 is a horizontal plane that becomes the base 1 crown,
That is, after pouring until it reaches the lower surface of the previously temporarily fixed set plywood 3, the concrete 10 is cured for a predetermined period.

After the concrete 10 is completely hardened, the nail 9 for temporarily fixing the fixing wood piece 4 and the form 5 is pulled out, and at the same time, the setting metal fitting 8 is removed from the screw hole of the setting plywood 3.

In this state, if the positioning jig 2 is removed from the top end of the foundation 1, the obtained foundation 1 is embedded with the sheath tube 6 at a predetermined position, and the tip is projected into the sheath tube 6. The anchor bolt 7 is set up in this state.

After that, when the foundation 1 and the upper structure are tightly connected by the anchor bolts 7, the anchor bolts 7 are fixed by injecting a grout material into the gap in the sheath tube 6 and hardening it. The foundation 1 and the upper house structure are tightly connected to each other by inserting the anchor bolt 7 into the wall of the upper house structure and fastening it with a nut or the metal fitting 8 for setting.

[0013]

However, when the conventional positioning jig 2 described above is used, the nail 9 is hammered horizontally from the fixing wood piece 4 toward the form 5 in the work of temporarily fixing after installation. Since it is carried out by such a method, there is a problem that the nailing work is difficult to perform and the workability of installing the positioning jig 2 is poor.

Also, the work of attaching the sheath tube 6 to the set plywood 3 must be carried out by the troublesome work of screwing the sheath pipe 6 into the screw holes of the set plywood 3 using the set metal fitting 8, which is troublesome. In addition to the poor workability, there is a problem in that the manufacturing cost of the metal fitting 8 for setting is high.

After removing the positioning jig 2 from the top end of the base 1, the top end of the base 1 is in a state in which the upper portion of the sheath tube 6 embedded earlier is opened. For this reason, the sheath tube 6 is always exposed during the period until the upper structure is placed on the foundation 1 and tightly connected, and it is not possible to avoid intrusion of impurities such as rain and dust. .

The present invention has been made in view of such circumstances, and the sheath tube can be easily temporarily fixed to the set plywood, and the positioning jig can be easily installed on the base top end. The purpose of the present invention is to provide a sheath tube positioning jig that can be used for

[0017]

The sheath tube positioning jig of the present invention is formed in a rectangular plate shape having the same width as the width of the foundation, and is horizontally housed between the molds according to the top end of the foundation. The rubber set plywood that is used is to engage the sheath tube from the lower side of the set plywood at the position where the sheath tube is to be embedded when installed in the corners and straight portions of the base top end. The above problem is solved by providing a dowel hole and providing the engaging hole with a lid member that is detachably fitted from the upper side of the set plywood to temporarily fix the sheath tube.

[0018]

According to the sheath tube positioning jig of the present invention, since the set plywood is a rubber plate having the same width as the base, the set plywood should be aligned with the predetermined position of the base top end. This positioning jig can be reliably installed by a simple operation of just putting it between the molds. Moreover, since it is not necessary to nail, the work can be simplified.

Further, the sheath tube is arranged from the lower side of the set plywood into the engaging hole provided in the set plywood, and the lid member is fitted from the upper side so as to be press-fitted into the upper opening of the sheath tube. For example, the sheath tube can be easily temporarily fixed to the set plywood, and can be similarly removed by a simple operation.

Further, after removing the positioning jig from the base top end, the lid member is fitted into the upper opening of the sheath tube to easily close the opening,
It is possible to prevent intrusion of rain and dust.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A sheath tube positioning jig of the present invention will be described below with reference to FIGS.

In the figure, reference numeral 12 is a mold for constructing the foundation 11, which is assembled at a position surrounding the planned foundation construction area with a predetermined width. Then, inside the formwork 12, concrete 13 is cast until reaching a horizontal plane which is the top end of the foundation 11, that is, a horizontal plane slightly lower than the upper end of the formwork 12.

At the top end of the foundation 11 where the concrete 13 is still in an uncured state, a sheath tube positioning jig (hereinafter simply referred to as a positioning jig) 15 is installed at a predetermined position. FIG. 1 shows a state in which the positioning jig 15 is installed at a corner portion of the top end of the foundation 11, and FIG. 2 shows a state in which it is installed in a straight line portion.

Reference numeral 16 in the drawing is a set plywood. The set plywood 16 is made of elastic rubber,
The base 1 is formed in a rectangular plate shape having the same width as the width 1.
It is designed to be horizontally housed between the molds 12 in accordance with the top end of the mold. A relatively hard rubber is preferably used as the rubber. Specifically, for example, natural rubber (N
R), styrene-butadiene rubber (SBR), nitrile rubber (NBR), chloroprene rubber (CR), isoprene rubber (IP), butadiene rubber (BR), or these are vulcanized and crosslinked to have an appropriate hardness. Something is used.

Further, on the four peripheral portions of the set plywood 16,
When this positioning jig 15 is installed on the top of the foundation 11, a triangular notch 17,1 for pointing this module core to a position corresponding to the module core of the wall of the upper structure
8 are formed respectively.

Further, the sheath tube 20 is set at a predetermined position of the set plywood 16, that is, at a position where the sheath tube 20 is to be embedded when the sheath tube 20 is installed at the corners and straight portions of the top end of the foundation 11. Three engaging holes 21 for engaging from the lower side are formed. The sheath tube 20 has a bottomed cylindrical shape, and should be closely attached to the lower surface of the set plywood 16 with its upper opening aligned with the engagement hole 21. The engaging holes 21 are formed in a circular shape having a diameter substantially the same as the diameter of the sheath tube 20.

Explaining the position of the engagement hole 21 in detail, a first line connecting the notches 17 provided at both ends in the length direction of the set plywood 16 and both ends in the width direction. The first engaging holes 21a are respectively provided at positions that are equally spaced along the first line and the second line from the position where the notches 18 provided in the second line connecting the notches 18, 18 intersect. And the second
Engaging hole 21b is provided. Further, a third engagement hole 21c is provided on the first line and at a position separated from the first engagement hole 21a by a predetermined distance. Here, the first and second engagement holes 21a and 21b are provided in the sheath tube 2 when the positioning jig 15 is installed in the corner portion of the foundation 11.
0 is for deciding the position to be embedded, and the first and third engagement holes 21a and 21c are provided for the sheath tube 20 when the positioning jig 15 is installed in the orthogonal portion of the foundation 11. It is for determining the position to be buried.

These engaging holes 21 (21a, 21b, 21
In c), lid members 22, 22, 22 that are detachably fitted from above the set plywood 16 and temporarily fix the sheath tube 20 are provided. The lid member 22 is made of an elastic rubber material, and has a substantially frustoconical shape in which the diameter is gradually reduced downward. The diameter of the engaging hole 21 is substantially the same as the diameter of the engaging hole 21.
When it is fitted in, the engagement hole 21 is locked at this portion. The lid member 22 is fitted into the engagement hole 21, and at the same time, the sheath tube 20 is attached to the engagement hole 21 from the lower side of the set plywood 16.
It is considered that the sheath tube 20 can be temporarily fixed in a predetermined state by being press-fitted into the upper opening of the.

Next, a method of constructing a foundation using the sheath tube positioning jig of this embodiment will be described.

After arranging the formwork 12 of a predetermined shape on the site to determine the planned foundation construction area, concrete 13 is placed inside the area. After pouring the concrete 13 until it reaches the horizontal surface which becomes the top of the foundation 11, the positioning jig 15 is installed at a predetermined position on the top of the foundation 11 while the concrete 13 is still uncured.

First, referring to FIGS. 1 and 3, the foundation 1
1 A method for positioning the embedded sheath tube at the corner of the top will be described. At this time, prior to installing the positioning jig 15, the first and second setting plywoods 16 are set in advance.
The sheath tubes 20 and 20 are attached and temporarily fixed to the engaging holes 21a and 21b from below the set plywood 16. That is, the upper openings of the sheath tubes 20 and 20 are connected to the first and second openings.
The lid members 22, 22 are fitted into the engaging holes 21a, 21b from the upper side of the set plywood 16 in a state of being brought into close contact with the lower surface of the set plywood 16 in alignment with the engaging holes 21a, 21b. While fitting the lid members 22, 22 into the engagement holes,
The sheath tubes 20 and 20 can be temporarily fixed to the set plywood 16 by being pressed into the upper openings of the sheath tubes 20 and 20.

Thus, the first and second engagement holes 21a, 2a
Set plywood 16 with sheath tubes 20, 20 temporarily fixed to 1b
To the upper corners of the foundation 11 and gradually lower the sheath tubes 20 and 20 while pushing them into the concrete 13 to set the set plywood 16 to the foundation 1
1 Place it horizontally on the top and fit it between the molds. At this time, as a guide for aligning the set plywood 16, the four notches 17, 17, 18 and 18 described above are used as the base 1
1 It is recommended to align with the module core on the top.

Next, with reference to FIGS. 2 and 3, a method for positioning the embedded sheath tube in the straight portion of the top end of the foundation 11 will be described. At this time, the sheath tubes 20 and 20 are attached and temporarily fixed from the lower side of the set plywood 16 to the first and third engagement holes 21a and 21c of the set plywood 16 in advance by the same method as described above. deep.

Then, the set plywood 16 is attached to the foundation 11
Of the sheath pipes 20 and 20 are gradually lowered while being pushed into the concrete 13, and the sheath pipes 20 and 20 are installed at predetermined positions of the straight line portion in the same manner as described above.

In this way, after the positioning jigs 15 and 15 are installed at the corners and straight portions of the top end of the foundation 11, the concrete 13 is cured and hardened for a predetermined period.

After the concrete 13 is completely hardened, the lid member 22 fitted in the engaging hole 21 of the set plywood 16
Remove. Then, the positioning jigs 15 are removed from the top of the foundation 11. Furthermore, the mold 12 is disassembled and removed. Then, the obtained foundation 11 is embedded with the sheath tube 20 at a predetermined position in a state of being opened at the top end of the foundation 11.

Then, the previously removed lid member 22 is fitted again into the opening of the sheath tube 20 to close it. The lid member 22 is fitted into the opening of the sheath tube 20 as it is until the upper structure is placed on the foundation 11 and tightly bound.

Thereafter, at the time of constructing the upper house structure, the lid member 22 is removed from the sheath tube 20 and an anchor bolt (not shown) is inserted into the sheath tube 20. The upper structure is placed on the foundation 11, the module core of the foundation and the module core of the foundation 11 are aligned, and the tip of the anchor bolt is inserted into the wall and fastened with a nut. At the same time, a grout material is injected into the gap in the sheath tube 20 and cured to fix the anchor bolt.

As described above, according to the sheath tube positioning jig of this embodiment, since the set plywood 16 is a rubber plate having the same width as the base, the set plywood 16 is fixed to the base 11 top end. Form 12 so as to match the predetermined position of
The positioning jig 15 can be surely installed by a simple operation such that the positioning jig 15 is housed in the space. Moreover, it is possible to improve workability by omitting the conventional labor of nailing for temporary fixing.

Further, the sheath tube 20 is arranged in the engaging hole 21 provided in the set plywood 16 from the lower side of the set plywood 16 and the lid member 22 is fitted in from the upper side so that the upper opening of the sheath tube 20 is inserted. By press-fitting the sheath tube 20, the sheath tube 20 can be easily temporarily fixed to the set plywood 16. Therefore, it is possible to save the time and labor required for temporarily fixing the sheath tube 20, and to save labor and reduce the time required for on-site construction. Further, when the set plywood 16 is removed, similarly, the lid member 25 may be pulled out, so that it is possible to simplify the work by omitting the troublesome work of screwing the set fitting as in the conventional case. Further, since the inexpensive lid member 22 is used instead of the conventional metal fitting for setting as described above, the cost can be reduced.

Further, after the positioning jig 15 is removed, the lid member 22 is fitted into the upper opening of the sheath tube 20 to easily close the opening. Therefore, during the period until the bond with the upper structure,
It is possible to prevent impurities such as rain and dust from entering the sheath tube 20 and keep the work site clean.

Further, according to this positioning jig 15, the three engaging holes 21 (21a, 21b, 2) are formed in the set plywood 16.
1c) is provided and the first and second engagement holes 21 are provided.
The a and 21b are used when determining the sheath tube burying position in the corners of the foundation 11 and when the first and third engaging holes 21a and 2b are provided.
1c can be used when determining the position where the sheath tube is embedded in the straight portion of the foundation. Therefore, the positioning jig 15 having the same specifications can be applied to both the corner portion and the straight portion, and the manufacturing cost can be reduced.

Since the positioning jig 15 is provided with notches 17, 17, 18, 18 on its four peripheral portions, these notches 17, 1 are provided when the set plywood 16 is installed.
If 7, 18 and 18 are aligned with the module core at the top of the foundation 11, the alignment can be easily performed, and the installation can be performed with high precision and without any trouble.

Further, since the positioning jig 15 is installed at a predetermined position so as to be housed between the molds 12 after the concrete 13 is cast, the concrete 13 is placed as in the conventional case.
Compared with the method of installing before pouring, problems such as lateral displacement of the set plywood 16 due to pouring of concrete 13 can be avoided.

The sheath tube positioning jig of the present invention is not limited to the above-mentioned embodiment, and the specific constitutional requirements such as the shape, material and size of each member such as the set plywood 16 and the lid member 22 are as follows. It can be appropriately changed in implementation.

For example, the lid member 22 temporarily and temporarily fixes the set plywood 16 and the sheath tube 20 together with the sheath tube 2
Any structure other than the frustoconical shape made of the rubber material as shown in the above embodiment may be used as long as it can close the 0 upper opening. For example, the lid member 22 can be expanded and contracted in the horizontal direction and has a spring-shaped expansion and contraction portion that is detachably fitted into the engagement hole 21 and the upper opening of the sheath tube 20. It is also possible to do so.

The set plywood 16 may be made of rubber other than those described above, as long as the set plywood 16 is elastic enough to be fitted horizontally between the molds 12. is there.

The position and the number of the engaging holes 21 provided in the set plywood 16 are not limited to the examples shown in the above-mentioned embodiment, and the upper structure to be constructed later on the line corresponding to the module core. The position and the number may be set in accordance with the position of tight connection with.

[0049]

As described above, according to the sheath tube positioning jig of the present invention, since the set plywood is a rubber plate having the same width as the base, this set plywood is used as the base top end. The positioning jig can be surely installed by a simple operation of fitting it between the molds so as to be aligned with the predetermined position. Therefore, there is no need for nailing for temporary fixing as in the prior art, and the sheath tube can be positioned accurately and with less effort, and workability can be improved.

Further, the sheath tube is arranged from the lower side of the set plywood into the engagement hole provided in the set plywood, and the lid member is fitted from the upper side so as to be press-fitted into the upper opening of the sheath tube. For example, the sheath tube can be easily temporarily fixed to the set plywood, and can be similarly removed by a simple operation. Therefore, it is possible to save the labor required for temporarily fixing and removing the sheath tube, and to save labor and reduce the time required for on-site construction.

After the set plywood is removed, the lid member is fitted into the upper opening of the sheath tube to easily close the opening and prevent the entry of rain or dust. Therefore, the work site can be kept clean.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating an embodiment of a positioning jig for a sheath tube of the present invention, showing a state in which the positioning jig is installed in a corner portion of a foundation.

FIG. 2 is a perspective view showing a state in which a positioning jig for the sheath tube is installed on a linear portion of a foundation.

FIG. 3 is a side sectional view showing a state of a foundation on which a positioning jig for the sheath tube is installed.

FIG. 4 is a side sectional view showing a state of a foundation on which a conventional positioning jig is installed.

[Explanation of symbols]

 11 Foundation 12 Formwork 13 Concrete 15 Positioning jig (positioning jig for sheath tube) 16 Set plywood 20 Sheath tube 21 Engagement hole 21a First engaging hole 21b Second engaging hole 21c Third engaging hole 22 Lid member

Claims (1)

[Claims] 1. In a construction method for constructing a foundation by placing a formwork and placing concrete, the sheath is installed at corners and straight portions of the top of the foundation when the sheath tube is buried, A sheath tube positioning jig for positioning and holding a tube, which is formed of a rectangular plate having the same width as the width of the foundation, and is a rubber set that is placed horizontally between the molds according to the top end of the foundation. In the plywood, at the position where the sheath tube should be embedded when installed in the corners and straight parts of the base crown, respectively,
An engagement hole is formed for engaging the sheath tube from the lower side of the set plywood, and a lid member that is detachably fitted from the upper side of the set plywood to temporarily fix the sheath tube is provided in the engagement hole. A jig for positioning a sheath tube characterized by the following.