JP7022425B2 - jig - Google Patents

Description

The present invention relates to a jig that displays a target height for placing a leveling material to be poured into the top surface of concrete.

When constructing a concrete foundation, a leveling material is poured into the top surface of the concrete in order to flatten the top surface of the concrete foundation. Before pouring the leveling material, it is necessary to set a mark indicating the target height for placing the leveling material in advance. As such a mark, for example, an advance / retreat mark for a top-end assisting tool of Patent Document 1 is used.

The advance / retreat mark 10 for the top-end assisting tool of Patent Document 1 is formed on a rod body portion 11 inserted into a mounting hole 21 formed in the assisting tool main body 20 and a part of the outer periphery of the rod body portion 11. A screw thread portion 12 and a mark 13 formed at the upper end of the rod body portion 11 are provided. In the advance / retreat mark 10, first, the auxiliary tool main body 20 is inserted into the uncured concrete. Next, the rod body portion 11 is moved in the vertical direction to align the position of the mark 13 with the target height for placing the leveling material. After that, the leveling material is poured to the position of the mark 13.

Japanese Unexamined Patent Publication No. 2015-030995

By the way, the rod body portion on which the threaded portion is formed is usually made of a metal material. However, there is a problem that the rod body made of a metal material has a high manufacturing cost.

An object of the present invention is to provide a jig that can be manufactured at low cost and for displaying a target height for placing a leveling material.

The present invention provides the inventions of the following aspects.
(Item 1)
It is a jig that displays the target height for placing leveling material.
A resin screw having a display unit indicating the casting target height, and
A resin main body having a hollow portion into which the screw is inserted, and at least a part of which is inserted into uncured concrete after casting.
A resin screwed portion for screwing with the screw and rotating the screw in the vertical direction,
A jig characterized by being provided with.
(Item 2)
The main body portion includes a portion to be inserted into which the hollow portion is formed and inserted into the concrete, and a non-insertion portion formed above the planned insertion portion and not inserted into the concrete.
The non-insertion portion includes a wall portion located outside the hollow portion and extending upward from the planned insertion portion.
The jig according to item 1.
(Item 3)
Further provided with a resin intermediate member, at least a part of which is detachably inserted into the inner space of the wall portion.
The intermediate member has a screw insertion hole into which the screw is inserted and communicates with the hollow portion.
The screwed portion is formed on the inner surface of the screw insertion hole.
The jig described in item 2.
(Item 4)
On the inner surface of the wall portion, an engaging protrusion that engages with the upper end corner portion of the portion of the intermediate member that is inserted into the inner space of the wall portion is formed.
The jig according to item 3.
(Item 5)
The wall portion is formed in a non-circular shape in a plan view.
The intermediate member has a non-perfect circular shape portion having a shape complementary to the wall portion and fitting to the inner surface of the wall portion.
The jig according to item 3 or 4.
(Item 6)
The intermediate member is connected to the main body portion by a flexible connecting portion made of resin.
The jig according to any one of items 3 to 5.
(Item 7)
The wall portion is configured so that the space inside the wall portion can be expanded.
The jig according to any one of items 2 to 6.
(Item 8)
A slit is formed in the wall portion to divide the wall portion into a plurality of wall portions.
The jig according to any one of items 2 to 7.
(Item 9)
The screwed portion is formed on the inner surface of the hollow portion or the inner surface of the wall portion.
The jig according to item 1 or 2.
(Item 10)
The screwed portion is a protrusion.
The jig according to any one of items 1 to 9.
(Item 12)
The head of the screw has an affinity for colored substances.
The jig according to any one of items 1 to 10.

Since all the components of the jig of the present invention are made of resin, the jig can be manufactured at low cost.

(A) An exploded perspective view of the jig, and (b) an assembled perspective view of the jig. FIG. 1 (b) is a sectional view taken along line II-II of FIG. 1 (b). (A) is a plan view of the main body, and (b) is a sectional view taken along line IIIb-IIIb of (a). (A) is a plan view of an intermediate member, and (b) is a sectional view taken along line IVb-IVb of (a). It is a figure which shows the usage state of a jig. It is a perspective view of the modification of the jig. (A) It is a figure of the modification of the jig, and is the sectional view of (b) (a).

The present invention will be described with reference to the drawings. The embodiments described below show a preferred specific example of the present invention. The present invention is not limited to the following embodiments, and can be appropriately modified without departing from the gist thereof.

[Jig configuration]
FIG. 1A is an exploded perspective view of the jig 1, and FIG. 1B is an assembly perspective view of the jig 1. FIG. 2 is a sectional view taken along line II-II of FIG. 1 (b). Hereinafter, the vertical direction of FIG. 1A will be described as the vertical direction of the jig 1. The jig 1 is used to display the casting target height of the leveling material poured into the top surface of the concrete after casting when constructing a concrete structure such as a concrete foundation. The jig 1 includes a resin screw 2, a resin main body 3, and a resin intermediate member 4. The intermediate member 4 is detachably attached to the main body 3. Further, in the present embodiment, since the intermediate member 4 and the main body portion 3 are not connected to each other via any other member, the intermediate member 4 and the main body portion 3 are connected to each other in a state where the intermediate member 4 is removed from the main body portion 3. Completely separated. The screw 2 is inserted into the intermediate member 4 and the main body portion 3, and rotates and moves in the vertical direction with respect to the intermediate member 4 and the main body portion 3. As the resin, for example, polypropylene can be used. The details of each component of the jig 1 will be described below.

The screw 2 will be described with reference to FIGS. 1 and 2. The screw 2 is composed of a long rod-shaped screw body 21 on which a male screw is formed and a head 22 integrally formed on the upper end of the screw body 21. A tool engaging hole 23 with which a tool for rotating the screw 2 is engaged is formed on the upper surface of the head 22. The upper end of the head 22 functions as a mark for displaying the target height for placing the leveling material. That is, when placing the leveling material, first, the upper end position of the head 22 is set to the target height for placing the leveling material, and then the leveling material is poured to the upper end position of the head 22 (Fig.). 5).

The main body 3 will be described with reference to FIGS. 1 to 3. 3A is a plan view of the main body 3, and FIG. 3B is a sectional view taken along line IIIb-IIIb of FIG. 3A. The main body 3 includes a planned insertion portion 31 that will be inserted into the concrete before hardening, and a non-insertion portion 32 that is not inserted into the concrete and protrudes from the concrete. The main body portion 3 is preferably an integrally molded product in which the planned insertion portion 31 and the non-insertion portion 32 are integrally connected.

The insertion schedule portion 31 is composed of a first portion 311 and a second portion 312 integrally formed at the upper end of the first portion 311. The first portion 311 is composed of a bottomed bulging portion formed substantially in the center and a thin plate-shaped wing portion extending from both ends of the bulging portion. The bulging portion defines a hollow portion 313 into which the screw 2 is inserted. The hollow portion 313 penetrates substantially the center of the second portion 312 and extends in the vertical direction in the bulging portion, and has a substantially perfect circular shape in a plan view. The second portion 312 has a substantially elliptical thin plate shape in a plan view, extends in the horizontal direction, and is formed wider than the first portion 311. Two notches 314 are formed at symmetrical positions on the peripheral edge of the second portion 312. The second portion 312 functions as a mark indicating the insertion target height when the main body portion 3 is inserted into the concrete. That is, the main body portion 3 is inserted into the concrete up to a position where the concrete covers the upper surface of the second portion 312 (see FIG. 5).

The non-insertion portion 32 includes a wall portion 321 which is rectangular in a plan view and extends upward from the second portion 312 of the planned insertion portion 31. The wall portion 321 surrounds the hollow portion 313 and extends upward from a position outside the hollow portion 313. Two slits 322 extending from the upper end to the vicinity of the lower end of the wall portion 321 are formed in the wall portion 321 at symmetrical positions, and the wall portion 321 is separated into two wall portions 321a and 321b by the two slits 322. There is. Since each of the wall portions 321a and 321b has resin elasticity, they can be elastically deformed outward. The inner space of the wall portion 321 is expanded by elastically deforming the wall portions 321a and 321b outward. On the upper inner surfaces of the wall portions 321a and 321b, protrusions 323 protruding inward are formed, respectively. The protrusion 323 of the wall portion 321a and the protrusion 323 of the wall portion 321b exist at symmetrical positions.

The intermediate member 4 will be described with reference to FIGS. 1, 2 and 4. 4 (a) is a plan view of the intermediate member 4, and FIG. 4 (b) is a sectional view taken along line IVb-IVb of FIG. 4 (a). The intermediate member 4 is integrally formed with the cylindrical first portion 41 and the outer side of the first portion 41 at a substantially intermediate position in the axial direction, and is composed of a rectangular second portion 42 in a plan view. The central axis of the first portion 41 is substantially the same as the central axis of the hollow portion 313 of the main body portion 3.

The portion of the first portion 41 below the second portion 42 is inserted into the hollow portion 313. The first portion 41 has a screw insertion hole 411, and when the intermediate member 4 is attached to the main body portion 3, the screw insertion hole 411 communicates with the hollow portion 313 of the main body portion 3. On the inner surface of the screw insertion hole 411, a screw portion 43 to be screwed with the screw 2 is integrally formed at a substantially intermediate position in the axial direction of the first portion 41. In the present embodiment, the screwed portion 43 is a protruding portion protruding from the inner surface of the screw insertion hole 411. The screw 2 can be rotated and moved in the vertical direction in the screw insertion hole 411 by being inserted into the screw insertion hole 411 and screwing with the screw portion 43.

The second portion 42 has a rectangular shape complementary to the wall portion 321, is inserted into the inner space of the wall portion 321 and fits with the inner surface of the wall portion 321. The vertical length of the second portion 42 is smaller than the vertical length of the wall portion 321 and the second portion 42 is completely accommodated in the inner space of the wall portion 321 in the height direction thereof. When the second portion 42 is housed in the inner space of the wall portion 321 the protrusion 323 is located on the upper end corner of the second portion 42.

[How to use the jig]
A method of using the jig 1 will be described with reference to FIG. FIG. 5 is a diagram showing how to use the jig 1, showing a state in which the insertion planned portion 31 of the main body portion 3 is inserted into the concrete C and the leveling material L is poured to the upper end of the head 22 of the screw 2. Represents.

After placing the concrete C between the pair of formwork, before the concrete C hardens, the main body portion 3 is inserted into the concrete C until the upper surface of the second portion 312 of the planned insertion portion 31 is covered with the concrete C. do.

When the concrete C is uncured (semi-cured) or after the concrete C is cured, the screw 2 is rotated so that the upper end of the head 22 of the screw 2 is aligned with the casting target height of the leveling material L.

The leveling material L is poured to the upper end of the head 22 of the screw 2.

[Action effect]
The operation and effect of the jig 1 will be described.

Since the screw 2, the main body 3 and the intermediate member 4 of the jig 1 are all made of resin, the jig 1 can be manufactured at low cost.

Since the first portion 311 of the scheduled insertion portion 31 is provided with a thin plate-shaped blade portion, the resistance when the main body portion 3 tries to rotate in the concrete becomes large. As a result, when the screw 2 is rotated in a state where the concrete is uncured, it is possible to prevent the main body portion 3 from rotating together with the screw 2, and it is possible to rotate only the screw 2.

Since the cutout portion 314 is formed in the second portion 312 of the scheduled insertion portion 31, the concrete invades the cutout portion 314 when the scheduled insertion portion 31 is inserted into the concrete. The concrete that has entered the notch 314 becomes a resistance when the main body 3 tries to rotate. In this way, when the screw 2 is rotated in a state where the concrete is uncured, it is possible to further prevent the main body portion 3 from rotating together.

When constructing a concrete structure, it may be desired to use a screw 2 having a large lead (movement amount per rotation) or a screw 2 having a small lead (movement amount per rotation) according to a target thickness of a leveling material or the like. For example, when constructing a concrete structure in which it is necessary to adjust the casting target height of the leveling material with high accuracy, a screw 2 having a small lead and a screw portion 43 having a thickness matching the screw 2 are provided. The intermediate member 4 is used. In the jig 1, since the intermediate member 4 is completely separable from the main body 3, the screw 2 and the intermediate member 4 can be easily replaced with the screw 2 and the intermediate member 4 having a desired lead. .. On the other hand, since the main body 3 does not need to be replaced and can be used in common as it is, the manufacturing cost can be suppressed by standardizing the parts.

The wall portion 321 has a rectangular shape in a plan view, and the second portion 42 of the intermediate member 4 has a shape complementary to the wall portion 321 and fits on the inner surface of the wall portion 321. As a result, when the screw 2 is rotated, it is possible to prevent the intermediate member 4 from rotating together with the screw 2 in the inner space of the wall portion 321 so that only the screw 2 can be rotated. become.

Since the protrusion 323 provided on the inner surface of the wall portion 321a engages with the upper end corner portion of the second portion 42 of the intermediate member 4, the intermediate member 4 cannot be easily pulled out from the inner space of the wall portion 321. It has become like. Thereby, for example, when the screw 2 is rotationally moved upward, it is possible to prevent the intermediate member 4 from coming off from the inner space of the wall portion 321. On the other hand, since the two wall portions 321a and 321b can be elastically deformed outward, the inner space of the wall portion 321 can be expanded by elastically deforming one or both of the two wall portions 321a and 321b outward. Can be done. As a result, even if the protrusions 323 are formed on the inner surfaces of the wall portions 321a and 321b, the intermediate member 4 can be inserted into the inner space of the wall portion 321 by expanding the inner space of the wall portion 321. The intermediate member 4 can be taken out from the inner space of the wall portion 321.

When the height adjustment of the screw 2 is completed, a coloring substance such as ink may mark the upper surface of the head 22 of the screw 2 to indicate that the height has been adjusted. In the jig 1 of the present invention, since the screw 2 is made of resin, it has a high affinity with a coloring substance and is easily marked by the coloring substance.

[Modification example]
Hereinafter, a modification of the jig 1 will be described.

(1) As shown in FIG. 6, the jig 1 may include a flexible connecting portion 5 for connecting the intermediate member 4 and the second portion 312 of the scheduled insertion portion 31. In this modification, the intermediate member 4 is removable in the inner space of the wall portion 321 of the main body portion 3, but in a state where the intermediate member 4 is removed from the inner space of the wall portion 321, the intermediate member 4 is a connecting portion. 5 makes it inseparable from the main body 3. Both ends of the connecting portion 5 are integrally connected to the intermediate member 4 and the second portion 312, respectively. The connecting portion 5 can be made of, for example, a resin-made string-shaped member. Since the intermediate member 4 and the second portion 312 are connected by the connecting portion 5, the intermediate member 4 and the main body portion 3 do not fall apart, and the intermediate member 4 can be prevented from being lost. The connecting portion 5 may be configured to connect the wall portion 321 and the intermediate member 4.

(2) The wall portion 321 and the second portion 42 of the intermediate member 4 are not limited to a rectangular shape in a plan view, and may be a non-perfect circular shape such as a polygon such as an ellipse or a hexagon. Even with such a shape, it is possible to prevent the intermediate member 4 from rotating together with the screw 2 in the inner space of the wall portion 321 when the screw 2 is rotated. If the frictional force between the inner surface of the wall portion 321 and the outer surface of the second portion 42 of the intermediate member 4 can prevent the intermediate member 4 from rotating together, the second portion 42 of the wall portion 321 and the intermediate member 4 May have a perfect circular shape.

(3) The screw portion 43 may be a female screw formed on the inner surface of the screw insertion hole 411.

(4) As shown in FIGS. 7A and 7B, the jig 1 may not include the intermediate member 4. In this case, the wall portion 321 can be formed into a perfect circular shape in a plan view, and the screwed portion 43 can be formed on the inner surface of the wall portion 321 formed in a perfect circular shape or the inner surface of the hollow portion 313 of the main body portion 3 ( 7 (a) and 7 (b) show an embodiment in which the screwed portion 43 is formed on the inner surface of the wall portion 321).

(5) The upper surface of the head 22 of the screw 2 does not have the tool engaging hole 23 and may be a flat surface. Since the upper surface of the head portion 22 of the screw 2 is a flat surface, marks due to colored substances are easily attached. When the tool engagement hole 23 is not formed on the upper surface of the head 22 of the screw 2, the shape of the head 22 is a non-round shape such as a polygon such as an ellipse or a hexagon in order to make it easier to rotate the screw 2. The shape is preferable.

1 Jig 2 Screw 22 Head 3 Main body 31 Scheduled insertion part 313 Hollow part 32 Non-insertion part 321 Wall part 322 Slit 323 Protrusion part (engagement protrusion)
4 Intermediate member 411 Screw insertion hole 42 Second part (non-round shape part)
43 Screwed part 5 Connection part

Claims (7)

It is a jig that displays the target height for placing leveling material.
A resin screw having a display unit indicating the casting target height, and
It has a hollow portion into which the screw is inserted, and at least a part thereof is a resin main body portion to be inserted into the uncured concrete after casting , and the hollow portion is formed and inserted into the concrete. A non-insertion portion formed above the planned insertion portion and not inserted into the concrete is provided, and the non-insertion portion is located outside the hollow portion and from the scheduled insertion portion. The main body, which has an upwardly extending wall,
A resin screwed portion for screwing with the screw and rotating the screw in the vertical direction,
A resin intermediate member that is detachably inserted into the inner space of the wall portion at least in part.
Equipped with
The intermediate member has a screw insertion hole into which the screw is inserted and communicates with the hollow portion.
The screwed portion is formed on the inner surface of the screw insertion hole.
A jig characterized by that. On the inner surface of the wall portion, an engaging protrusion that engages with the upper end corner portion of the portion of the intermediate member that is inserted into the inner space of the wall portion is formed.
The jig according to claim 1 . The wall portion is formed in a non-circular shape in a plan view.
The intermediate member has a non-perfect circular shape portion having a shape complementary to the wall portion and fitting to the inner surface of the wall portion.
The jig according to claim 1 or 2 . The intermediate member is connected to the main body portion by a flexible connecting portion made of resin.
The jig according to any one of claims 1 to 3 . The wall portion is configured so that the space inside the wall portion can be expanded.
The jig according to any one of claims 1 to 4 . A slit is formed in the wall portion to divide the wall portion into a plurality of wall portions.
The jig according to any one of claims 1 to 5 . The screwed portion is a protrusion.
The jig according to any one of claims 1 to 6 .

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