JP3425210B2 - spacer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer used for accurately maintaining a distance between a reinforcing bar and a form (bar cover thickness of the reinforcing bar).

[0002]

2. Description of the Related Art Conventionally, spacers have been used to form a required cover with concrete by keeping the distance between the reinforcing bar and the formwork above the legal limit (specified in Article 79 of the Enforcement Order of the Building Standards Act). ing. The spacers are arranged at appropriate intervals along the direction in which they are arranged.

[0003]

However, the conventional spacer has only the function of holding the space between the mold and the reinforcing bar at a predetermined interval, and does not have the function of supporting the mold in a required state. It was For example, the spacer for the footing formwork forming the footing part of the cloth foundation is only in contact with the inner surface of the footing formwork erected on the ground. Therefore, there are some cases where the footing formwork is not erected in a desired state, and when the concrete is placed, the footing formwork may be lifted up, or the weight of the concrete may cause the footing formwork to be inclined outward.

Therefore, an object of the present invention is to have not only a function of holding the space between the reinforcing bar and the formwork at a predetermined interval, but also a function of supporting the formwork in a required state. An object of the present invention is to provide a spacer that can prevent the frame from moving or bending.

[0005]

[Means for Solving the Problems] What achieves the above-mentioned object is to provide a reinforcing bar engaging portion for engaging a reinforcing bar, a form supporting portion for supporting a form in a required state, and the reinforcing bar engaging portion. And a frame support part are connected to each other, and a space holding part for holding the reinforcing bar and the frame at a predetermined interval is provided, and they are integrally molded.
And the formwork support engages one end of the formwork
A first formwork support part and a second formworking part that engages with the other end part of the formwork.
And a frame supporting part of
It is a spacer characterized in that it has a mounting portion that can be placed on the ground .

Further, the formwork is a footing formwork,
The first formwork support may engage with an upper end of the footing formwork, and the second formwork support may engage with a lower end of the footing formwork. Furthermore, it is preferable that the mold frame support portion has a locking portion that locks the mold frame. Furthermore, the first formwork support portion is
The second formwork support part has a second lock part that locks the lower end part of the footing formwork. You may have.

[0007]

The spacer of the present invention includes a reinforcing bar engaging portion that engages with a reinforcing bar, a space holding portion that holds the reinforcing bar and the mold at a predetermined distance, and a support for supporting the mold in a required state. Since it has a formwork support part, insert the reinforcing bar into the reinforcing bar engaging part,
By supporting the formwork on the formwork support part, the space between the reinforcing bar and the formwork can be maintained at a predetermined interval and the formwork can be supported in a desired state. It is possible to prevent the frame from moving or bending, and it is possible to satisfactorily cast concrete.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the spacer of the present invention will be described with reference to FIGS. 1 is a perspective view of an embodiment of the spacer of the present invention, FIG. 2 is a front view of the spacer of the embodiment of the present invention shown in FIG.
FIG. 2 is a right side view of the spacer of the embodiment of the present invention shown in FIG. As shown in FIG. 1, the spacer 1 of this embodiment includes a reinforcing bar engaging part 2 for engaging a reinforcing bar, a form supporting part 4 for supporting the form in a required state, and a reinforcing bar engaging part 2. And a frame support part 4 are connected to each other, and a space holding part 3 for holding the reinforcing bar and the frame at a predetermined space is provided.

As shown in FIG. 3, the spacer 1 of this embodiment has a reinforcing bar insertion portion 2a and a reinforcing bar storage space 2 therein.
Reinforcing bar engaging part 2 having b, first connecting part 13, second
Connecting portion 14, mounting portion 8, first rib 9, second rib 1
0, a fourth rib 15, a reinforcing rib 16, a reinforcing piece 17, and a space retaining portion 3 having a concrete flow portion 12, and a first
And a mold support part 4 having a second mold support part 6. Hereinafter, each configuration will be described in order.

The spacer 1 of this embodiment is a spacer for use in a footing form, but the spacer of the present invention is not limited to this, and for example, a column forming form or a wall forming form. Formwork, slab forming formwork,
Also included are those used for beam forming forms or retaining wall forming forms. Then, in such a case, the mold frame support portion 4 is appropriately changed and molded into a shape capable of supporting those mold frames.

The reinforcing bar engaging part 2 is a part for engaging with a reinforcing bar which is to form a cover, and the reinforcing bar engaging part 2 of this embodiment has a reinforcing bar insertion part 2a as shown in FIG. It has a reinforcing bar storage space 2b. The reinforcing bar insertion portion 2a is a part into which the reinforcing bar is inserted, and in this embodiment, as shown in FIG. 1, it is formed into a slit extending in the reinforcing bar arrangement direction (direction in which the reinforcing bar extends). The width of the slit is formed to be smaller than the diameter of the reinforcing bar to be engaged, and further, the reinforcing bar engaging portion 2 is made of a material having some flexibility,
For example, it can be detachably engaged with the reinforcing bar by being formed of synthetic resin.

Further, in this embodiment, the reinforcing bar storage space 2b is formed so as to extend for a predetermined length in the direction in which the reinforcing bars are arranged. By thus forming the storage space 2b so as to extend in the reinforcing bar direction, engagement with the reinforcing bar can be made more reliable, and the reinforcing bar can be prevented from easily coming off. it can. Further, the storage space 2b is formed so as to have a cross section that is substantially the same as the cross sectional shape of the reinforcing bar to be stored. In other words, the inner surface of the reinforcing bar engaging portion 2 is formed in substantially the same shape as the outer surface of the reinforcing bar to be engaged. By being formed in this manner, the engagement with the reinforcing bar can be made more reliable, and the reinforcing bar can be prevented from easily coming off.

The interval holding portion 3 is a part for holding the reinforcing bar and the form at a predetermined interval in order to form a cover having a predetermined cover thickness. In this embodiment, it functions so as to hold the frame support portion 4 and the reinforcing bar engaging portion 2 which will be described later at a predetermined interval. Specifically, the space holding part 3 holds the space by including a connecting part that connects the form supporting part 4 and the reinforcing bar engaging part 2. Therefore, the spacer of the present invention includes all spacers having a connecting portion that connects the form supporting portion and the reinforcing bar engaging portion.

The connecting portion of the gap holding portion 3 of this embodiment includes a first connecting portion 13 for connecting a first form frame support portion 5 and a reinforcing bar engaging portion 3 which will be described later, and a second die. It is composed of a second connecting portion 14 that connects the frame support portion 6 and the reinforcing bar engaging portion 3. In this way, the space holding portion 3 has two connecting portions 13,
By having 14, the form supporting part 4 and the reinforcing bar engaging part 2
And can be held at predetermined intervals.

Further, the spacing member 3 of this embodiment has a mounting portion 8 as shown in FIG. in this way,
Since the space holding portion 3 has the mounting portion 8, the mounting portion 8
By placing the on the ground or the like, the formwork can be supported in a more stable state. In addition, the gap holding portion 3 of this embodiment is similar to that shown in FIG.
As shown in (1), the first rib 9 extends on the perpendicular line from the reinforcing bar engaging portion 2 toward the mold. In other words, it has a first rib extending from the reinforcing bar engaging portion 2 and having a length substantially equal to the covering thickness. Since the interval holding portion 3 has such a first rib, an operator can recognize the fogging thickness by the length of the first rib, and thus the spacer to be used can be easily identified. It should be noted that the spacer 1 may be provided with a display mark for displaying a predetermined fog thickness.

Further, as shown in FIG. 2, the gap holding portion 3 of this embodiment has the second rib 10 interposed between the end portion of the first rib 9 and the first frame support portion 5. have. Further, the second rib 10 has a contact surface 10a that contacts the inner surface of the mold. Since the spacing member 3 has such a contact surface 10a with the mold, the mold can be supported more stably. In the present application, the inside means the side on which concrete is placed with the mold as a boundary, and the outside means the side on which concrete is not placed.

Further, the gap holding portion 3 of this embodiment has a concrete flow passage portion 12. By forming such a concrete circulation portion 12, when the concrete is poured, the concrete flows through this portion, so that the spacer 1 serves as a barrier and a portion where the concrete does not flow is formed. It can be prevented.

Further, the gap holding portion 3 of this embodiment is shown in FIG.
As shown in (4), a fourth rib 15 is provided between the end of the first rib 9 and the second form supporting portion 6. Further, the spacing member 3 of this embodiment includes the reinforcing ribs 16a, 1
It has 6b, 16c and 16d. Reinforcing rib 16a,
16b connects the placing part 8 and the reinforcing bar engaging part 2 to
6c and 16d are provided for reinforcement.

Further, as shown in FIG. 3, the spacing member 3 of this embodiment has a space around the connecting portion and the ribs, or, as shown in FIG.
A reinforcing piece 17 extending in a direction perpendicular to the ribs and the like is provided in a section formed by the connecting portion and the ribs. This makes it possible to increase the strength of the space holding portion 3, stably support the mold, and prevent the spacer from bending so that the space between the mold and the reinforcing bar engaging portion 2 can be more reliably set to the predetermined space. Can hold

The form supporting member 4 is a part for supporting the form in a required state. And in this embodiment, as shown in FIG.
As shown in FIG. 4, the mold support 4 includes a first mold support 5 that engages with one end of the mold and a second mold support 5 that engages with the other end of the mold.
And the frame supporting part 6 of FIG. More specifically, since the spacer 1 of this embodiment is used for the footing form, the first form supporting portion 5 engages with the upper end of the footing form to form the second form. The frame support 6 engages with the lower end of the footing form. In this way, the form support 4
, Two formwork support parts 5 that support the upper and lower ends of the formwork,
By being composed of 6, the mold can be supported more reliably. However, the spacer of the present invention is not limited to one having two formwork supporting portions, and may be one or may have three or more formwork supporting portions 4.

And, the first formwork support 5 of this embodiment
Is the first to lock the formwork as shown in FIG. 2 or FIG.
Has a locking portion 5a. By forming such a locking portion 5a, it is possible to support both sides of the mold, and the mold can be stably supported. Specifically, as shown in FIG. 3, the first locking portion 5a is composed of a piece of the first frame support portion 5 formed to have a substantially U-shaped vertical cross section. .

Also, the second form supporting member 6 of this embodiment.
Has a second locking portion 6a for locking the mold. By forming such a locking portion 6a, it is possible to support on both side surfaces of the mold, the mold can be stably supported, and it is possible to prevent the mold from easily coming off. Specifically, the second locking portion 6a of this embodiment is formed by a convex portion whose lower surface abuts the mold. However, it is not limited to the one that abuts on the lower surface, and may be the one that abuts on the side surface, or the one that abuts on the lower surface and the side surface, depending on the vertical cross-sectional shape of the supporting mold. And the 2nd formwork support part 6 of this Example has the standing piece 6b which contact | abuts and supports the side surface of a formwork.

As described above, the mold support portion 4 of this embodiment
Is a first formwork support 5 having a first locking portion 5a,
The second frame support part 6 having the second locking part 6a and the upright piece 6b forms a frame housing space 7 having a shape substantially the same as the vertical cross-sectional shape of the frame. Specifically, in this embodiment, as shown in FIG. 3, a mold housing space 7 of substantially the same shape for housing a mold having a substantially L-shaped vertical cross section is formed. Therefore, by engaging a mold having a substantially L-shaped vertical section with this portion, the mold can be stably supported without being easily disengaged. The spacer 1 of this embodiment is
Since it is used as a footing formwork, it is possible to firmly support the footing formwork by having the formwork storage space 7 having the above-mentioned shape, and even if concrete is poured, the footing formwork will move upward. Or it floats up
It is possible to prevent the weight of concrete from bending outward.

The spacer 1 of this embodiment is integrally molded of synthetic resin. As the synthetic resin, various thermoplastic resins such as vinyl chloride, vinyl acetate, acrylic, polyethylene, polystyrene, polypropylene, ABS resin, melamine and polyester, or thermosetting resins can be preferably used. As described above, since the spacer of the present invention is made of synthetic resin, it is lightweight, convenient to carry, and has improved workability. Even if it is buried in the ground, it does not corrode and no pests are generated.
However, the spacer 1 of the present invention does not necessarily have to be formed of a synthetic resin, and may be formed of mortar, concrete, metal, wood-based material, or the like.

Next, the method of using the spacer of the present invention will be described with reference to FIGS. 4 to 7, taking as an example the case of forming a cloth foundation by using it in a footing form. First, as shown in FIG. 7, the burial stones 38 and the spread gravel 39 are spread in the excavation hole 37 to perform earthwork. Next, the discarded concrete 41 is poured. The foundation formwork support tool 51 shown in FIG. 4 is arranged thereon, and the footing formwork support member 52 is placed.
The a and 52b are moved in the longitudinal direction of the substrate 53, and placed on the substrate 53 at a position where the required base width is obtained. Then, the footing form frames 50a and 50b are connected to the footing form support portion 5
4a and 54b are respectively supported, and both ends are erected. Further, a required number of supporting members 51 are arranged at predetermined intervals in the extending direction of the cloth foundation, and the footing form is attached.
Further, the necessary horizontal reinforcing bars 31 or vertical reinforcing bars are arranged.

Then, the spacer 1 of the present invention is arranged between a plurality of basic formwork supports 51 and attached to the footing formwork 50 and the horizontal reinforcing bar 31, respectively. Specifically, as shown in FIG. 5 or FIG. 6, footing is performed in the mold housing space 7 formed by the first mold supporting portion 5 and the second mold supporting portion 6 of the spacer 1 of the present invention. The mold 50 is inserted, the footing mold 50 is locked by the first locking portion 5a and the second locking portion 6a, and the spacer 1 is attached to the footing mold 50.

Further, as shown in FIG. 6, the horizontal reinforcing bar 31 is inserted from the reinforcing bar inserting section 2a of the reinforcing bar engaging section 2 to obtain the horizontal reinforcing bar 31.
The spacer 1 is attached to the horizontal reinforcing bar 31 by engaging with. As described above, the spacer of the present invention has the reinforcing bar engaging part that engages with the reinforcing bar and the form supporting part that supports the form, so that the interval between the reinforcing bar and the form is maintained at a predetermined interval. In addition to the function, it also has a function of supporting the formwork in a required state, so that it is possible to further prevent the formwork from moving or bending when concrete is placed.

Then, a space holder (not shown) is placed on the frame receiving plates 42a and 42b, and the space holder is placed on the space holders (not shown).
As shown in, the cloth foundation molds 32a and 32b are placed so as to face each other. Then, the small piece portions provided at both ends of the space holder are bent inside the molds 32a and 32b to fix the cloth base molds 32a and 32b. Further, the support plate 34 in which the anchor bolt 33 is inserted is placed and assembled on the upper parts of the cloth foundation molds 32a and 32b. In addition, the space holder for holding the space between the cloth foundation molds 32a and 32b is
Not only is it used by being placed on the base formwork support tool 51, but it is also used by being fixed to appropriate places above and below the cloth base formwork 32a, 32b.

After assembling the reinforcing bars and the formwork as described above, concrete is poured from the portion B in FIG. 7 to form a cloth foundation. Then, after a certain period of concrete curing, the cloth foundation forms 32a and 32b are removed, the excavation hole 37 is filled up, and the placing of the cloth foundation is completed. The spacer 1 and the base formwork support 51 of the present invention are directly embedded in the ground.

Next, another embodiment of the spacer of the present invention will be described with reference to FIG. FIG. 8 is a right side view of another embodiment of the present invention. The same parts are designated by the same reference numerals. The only difference between the spacer 20 of this embodiment and the spacer 1 shown in FIGS. 1 to 3 is the shape of the spacing member 3, and the other features are the same. Specifically, the spacer 20 of this embodiment includes the reinforcing ribs 16 b, 1 of the spacer 1.
It does not have 6c and 16d, but instead has a third rib 11 extending on a perpendicular line from the reinforcing bar engaging portion 2 toward the placing portion 8. The spacer 20 is such a third rib 1
By having 1, the operator can recognize the cover thickness by the length of the third rib 11, and can easily identify the spacer to be used. In addition, since the spacer spacing portion 3 has a larger concrete flow portion 12, it is possible to further prevent formation of a portion where concrete does not flow in, because the spacer serves as a barrier when pouring concrete.

Further, another embodiment of the spacer of the present invention will be described with reference to FIG. FIG. 9 is a right side view of another embodiment of the present invention. The only difference between the spacer 30 of this embodiment and the spacer 1 shown in FIGS. 1 to 3 is the shape of the space holding portion 3 and the shape of the first mold frame supporting portion 5, and the others are the same. The shape of the space holder 3 is the same as that of the spacer 20 described above, and thus the description thereof is omitted.

The first formwork support portion 5 of this embodiment is the second
Has a short piece portion 5b having the same length as the short piece portion 6c of the mold support portion 6, and the first formwork support portion 5 and the second formwork support portion 6 have a substantially Z-shaped cross section. A storage space 7 is formed.
As described above, the spacer of this embodiment forms the substantially Z-shaped mold housing space 7, so that by inserting a mold having a substantially Z-shaped longitudinal section into the space 7, The frame can be supported stably without the frame coming off easily.

Similarly, when the vertical cross section of the mold to be supported by the mold support portion 4 is a substantially inverted T-shape, as shown in FIG. 10, a substantially inverted T-shaped mold storage space 7 is formed. May be included. Further, when the supporting frame has a substantially T-shaped vertical section, the frame supporting portion 4 has a substantially T-shaped frame storage space 7 as shown in FIG. Good. Further, in the case where the supporting frame has a substantially I-shaped vertical cross section, the frame supporting portion 4 may have a substantially I-shaped frame storage space as shown in FIG. Good.

Further, in the embodiment shown in FIG. 13, the second engaging portion 6a is formed on the engaging piece projecting obliquely downward. When the second locking portion 6a is such a locking piece to support a mold having a flat surface portion, as shown in the figure, after the flat surface portion is hooked on this locking piece, The mold can be easily supported by the mold supporting portion 4 by erecting.

Further, the shapes of the reinforcing bar engaging portion 2, the space holding portion 3 and the form supporting portion 4 of the spacer of the present invention are not limited to the shapes of the above-mentioned embodiment, and for example, FIG.
Or, it may have a shape as shown in FIG. 14
Alternatively, FIG. 19 is a right side view of each embodiment. Hereinafter, description will be made step by step.

The features of the embodiment shown in FIG. 14 are that the first form supporting member 5 and the second form supporting member 6 are directly connected, and that the spacing member 3 is of a so-called donut type. And the reinforcing bar insertion part 2 in which the reinforcing bar engaging part 2 opens upward
The point of having a and the point of supporting a frame having an I-shaped vertical section. The reinforcing bar engaging portion 2 is not formed to have the same sectional shape as the sectional shape (substantially circular shape) of the reinforcing bar to be stored, but is formed to have a rectangular sectional shape. The feature of the embodiment shown in FIG. 15 is that the first form supporting member 5 and the second form supporting member 6 are directly connected,
The space holding part 3 is formed by one connecting member extending in the horizontal direction, and the placing part 8 is provided at the lower end of the rib extending in the vertical direction without being connected to the second formwork supporting part 6. That is the point.

The features of the embodiment shown in FIG. 16 are that the first form supporting portion 5 and the second form supporting portion 6 are directly connected to each other, and that the form having an L-shaped vertical section is supported. That is what you do,
The space | interval holding | maintenance part 3 is the point formed by the two connection members which each extend diagonally upward and diagonally downward. FIG. 17
The feature of the embodiment shown in FIG. 3 is that the spacing member 3 is formed by two connecting members that extend obliquely upward and obliquely downward, respectively, and that the mounting portion 8 has a second end at the lower end of a rib that extends vertically. And the reinforcing bar engaging section 2 has the reinforcing bar inserting section 2a that opens upward, and the sectional shape of the reinforcing bar to be stored (substantially circular shape). 2) is formed in a cross section having the same shape as that of FIG.

The feature of the embodiment shown in FIG. 18 is that the placing portion 8 is formed so as to extend further inward than the reinforcing bar engaging portion 2. By forming in this way, the spacer becomes more stable. The placing portion 8 and the reinforcing bar engaging portion 2 are connected by the connecting member 8a. The feature of the embodiment shown in FIG. 19 is that the first form supporting member 5 is located in a space having a U-shaped cross section formed near the upper end of the form,
It is a point that supports the formwork. As described above, the spacer of the present invention has a mold housing space having substantially the same shape as the vertical cross-sectional shape of the mold, and is not limited to the one supporting the mold so as to cover it, and the mold can be formed. Insert into the engaging space to
It may support the formwork. Further, the reinforcing bar engaging part 2 of this embodiment has a reinforcing bar housing space having a rectangular vertical cross-sectional shape, and a reinforcing bar inserting part 2a is formed inside and near the upper part. Further, in this embodiment, the space holding portion 3 has the frame locking portion 8b.

[0039]

The spacer of the present invention comprises a reinforcing bar engaging part for engaging with a reinforcing bar, a form supporting part for supporting the form in a required state, the reinforcing bar engaging part and the form supporting part. Since it has a space holding portion for connecting the rebar and the rebar and the formwork at a predetermined interval, the rebar is inserted into the rebar engaging part and the formwork is supported by the formwork support part. By doing so, the space between the reinforcing bar and the formwork can be maintained at a predetermined interval, and the formwork can be supported in a desired state, so that when the concrete is placed, the formwork moves or bends. This can be prevented, and concrete can be poured well.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a spacer of the present invention.

FIG. 2 is a front view of an embodiment of the spacer of the present invention shown in FIG.

FIG. 3 is a right side view of an embodiment of the spacer of the present invention shown in FIG.

FIG. 4 is an explanatory view for explaining the action of the spacer of the present invention.

FIG. 5 is an explanatory view for explaining the action of the spacer of the present invention.

6 is a cross-sectional view taken along the line AA of FIG.

FIG. 7 is an explanatory view for explaining the action of the spacer of the present invention.

FIG. 8 is a right side view of another embodiment of the spacer of the present invention.

FIG. 9 is a right side view of another embodiment of the spacer according to the present invention.

FIG. 10 is a right side view of another embodiment of the spacer of the present invention.

FIG. 11 is a right side view of another embodiment of the spacer according to the present invention.

FIG. 12 is a right side view of another embodiment of the spacer of the present invention.

FIG. 13 is a right side view of another embodiment of the spacer according to the present invention.

FIG. 14 is a right side view of another embodiment of the spacer according to the present invention.

FIG. 15 is a right side view of another embodiment of the spacer of the present invention.

FIG. 16 is a right side view of another embodiment of the spacer according to the present invention.

FIG. 17 is a right side view of another embodiment of the spacer according to the present invention.

FIG. 18 is a right side view of another embodiment of the spacer of the present invention.

FIG. 19 is a right side view of another embodiment of the spacer according to the present invention.

[Explanation of symbols]

1 spacer 2 Reinforcing bar engaging part 2a Reinforcing bar insertion part 2b Reinforcing bar storage space 3 Interval holding unit 4 Formwork support 5 First formwork support 5a First locking portion 6 Second formwork support 6a Second locking portion 6b Standing piece 7 Formwork storage space 8 Placement section 9 First rib 10 Second rib 10a contact surface 11 Third rib 12 Concrete Distribution Department 13 First connection part 14 Second connection part 15 Fourth Rib 16a Reinforcing rib 16b Reinforcing rib 16c Reinforcing rib 16d reinforcement rib 17 Reinforcement piece

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04G 17 / 06,17 / 14 E02D 27/00-27/52

Claims (4)

(57) [Claims] 1. A reinforcing bar engaging part for engaging a reinforcing bar, a form supporting part for supporting a form in a required state, the reinforcing bar engaging part and the form supporting part are connected to each other, and and a space holding portion for holding the rebar with the mold at a predetermined interval, together
It is molded and the mold support is one end of the mold
A first formwork support part engaging with the first formwork support part and the other end part of the formwork.
And a second formwork support part that is fitted,
The holding part has a placing part that can be placed on the ground
Spacer, characterized in that. 2. The formwork is a footing formwork, the first formwork support part engages with an upper end part of the footing formwork, and the second formwork support part is the footing formwork. The spacer according to claim 1 , which engages with a lower end portion of the frame. Wherein the mold supporting part, the spacer according to any one of claims 1 to 2 and has a locking portion for locking the mold. 4. The reinforcing bar engaging portion includes a reinforcing bar insertion portion and a reinforcing bar receiving portion.
A storage space according to any one of claims 1 to 3 having a storage space.
Mounted spacer.