JP2001271491A - Fastener for concrete form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener capable of simply connecting an unit form for concrete and a form to each other. SOLUTION: This fastener is provided with a connecting plate for forming a U-shaped clamping member, both clamping plates, the bases of which are fixed to both sides of the connecting plate, and a connecting shaft mounted on the head plate extended from one of both clamping plates. The connecting shaft is inserted in a connecting hole of a connecting fin of the unit form, and the connecting fin is held by the clamping member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for a concrete formwork, and more particularly, to a fastener capable of connecting the two formworks with one touch when connecting the unit formwork for concrete to the formwork.

[0002]

2. Description of the Related Art As a fastener for connecting unit forms for concrete, the applicant of the present application has filed Japanese Patent Application No. 10-3333.
The technology is disclosed as No. 81, and the outline of the disclosed technology will be described below with reference to FIG. FIG. 8 shows a case in which a plurality of unit forms 1 ', 1' are connected to each other and the connecting steel forms 7 'are reinforced in the longitudinal direction by supporting steel pipes 7'. The components are described as follows.

[0003] A fastening support 6 'in FIG.
1 ′ is fixed by a connecting member 8 ′ while being held between the connecting fins 3 ′, 3 ′ of the formwork, and the supporting steel pipe 7 ′ is held between the free end face of the connecting fin and the supporting arm 9 ′. In addition, 21 'is a mounting hole provided in the fins 3', 3 'of both mold frames. In addition, connection at other portions of the mold is performed by connecting tools 7 'having different clamping widths.

[0004]

The fastening means shown in the above-mentioned disclosed technique is a fastening tool 8 'having a different clamping width from that of the connecting tool 5'.
And a connecting tool 8 'for the fastening support tool 6' and a connecting tool 5 'at another location are required. The present invention is to provide a fastening tool in which the connecting tool 8 'of the fastening support tool 6' and the connecting tool 5 'of the other portion are basically the same, and the connecting force at any portion is maintained in common. It is assumed that.

[0005]

The connecting fins of the unit form are held by the holding member formed in a U-shape of the fastener according to the present invention using a holding function in a holding state. This is intended to be performed by a rotating action about a connecting shaft pivotally connected to a connecting hole of a connecting fin provided on the holding body. Further, the unit formwork applied to the present invention is such that one of the connection holes formed in the connection fins on both sides is formed as an elliptical hole so that the fastener can be easily attached.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. A fastener according to the present invention is designated by the reference numeral 10, and the fastener 10 includes two holding plates 11, 12 forming a U-shaped holding body 1, a connecting plate 13 of the two plates, and both holding plates 11, 12. The base of the connecting shaft 2 is fixed to the head plate 14 in which one of the holding plates 12 is extended by a predetermined length in the longitudinal direction from the other holding plate 11, and the free end is extended toward the holding plate 11. It has a configuration. Both holding plates 11, 1 in FIG.
The width H between the two is the connection width of the concrete form to be connected,
The width D between the connecting shaft 2 and the holding plate 11 is such that the connecting end surface of the concrete form does not hit the connecting shaft when the connecting shaft 2 is inserted into the connecting hole of the formwork.

The use of this embodiment will be described below with reference to FIGS. 2 and 3. FIG. 2 and 3
Shows the case where the two unit forms 5 and 5 are connected. When the two form forms are connected, the connection fins 51 and 51 of the both forms are brought into contact with each other and the respective connection holes 52 are formed. , 5
2, the connecting shaft 2 of the fastener 10 is inserted into the U-shaped holding body 1
Is rotated about the shaft 2 in the direction of the arrow, and the two fins 51, 51 are held by the holding body 1 to connect the two formwork. The fastening state is shown in FIG. 3, and as is clear from this figure, the fastener 10 according to the present invention has a unit formed by the both-side holding plates 11 and 12 and the connecting plate 13 forming the U-shaped holding body 1. Both fins 5 of formwork 5,5
1, 51 are held in a holding state, and both formwork are connected.

Another embodiment of the present invention will be described below with reference to FIG. The fastener 10 shown in this embodiment has the function of connecting the unit form described above and the function of holding the supporting steel pipe shown in FIG. The connecting function of the unit form is achieved by a U-shaped holding member indicated by reference numeral 1, and as shown in the previous embodiment, the holding plates 11 and 12 on both sides and the connecting plate 13 of these two plates are connected to one side. And a connecting shaft 2 provided on a head plate 14 extending from the holding plate.

The support function of the supporting steel tube is shown as a support 3, which is provided with a connecting arm 4 connected to the clamping body 1.
1 and a supporting body 42 having an L-shaped supporting arm 42 erected at the free end of the connecting arm 41 and a supporting plate 43 supporting the supporting body 4. Fastener 10 described above
5 is used, and as is apparent from FIG. 5, the two unit forms 5, 5 are connected so that the connected connecting fins 51, 51 are gripped by the holding body 1. .

Referring to FIG. 6, a description will be given of a use mode in which the unit frames are connected by using the fasteners shown in the above-described embodiments. In each of the fasteners 10 of both embodiments, the connecting fins 5 of the two unit
The fasteners 10 hold the supporting steel pipe 6 between the free end face of the connecting fin and the supporting arm 42 by means of the support 3. Reference numeral 6 functions as a horizontal beam of the unit form.

[Other Embodiments] A unit form to be applied to the fastener according to the present invention is shown in FIG. 7, and as is apparent from FIG. One of the fins 51, 51 is formed with a connection hole 52 of the connection shaft of the fastener shown in both embodiments, and the other fin is formed with an elliptical connection hole 53. The unit mold formed in this way has a slight imperfection in the positional relationship between the connection hole of one fin and the connection hole of the other fin when connecting both molds to the other unit mold via the connection fin. Even when alignment has occurred, the connecting shaft can be easily inserted, so that the fastening operation using the fastener can be easily performed. The fastener according to the present invention is not limited to each embodiment, and the means for forming the shape of the holding body and the support can be arbitrarily designed, and there is no particular limitation on the forming material.

[0012]

According to the present invention, a connecting shaft provided on one side of a holding plate formed in a U-shape is inserted into connecting holes of both connecting fins of a unit form to be connected, and the holding shaft is centered on this connecting shaft. By rotating the holding body formed by the plate and another holding plate, the two fins are held in a holding state and the unit form is connected, so that the joining operation can be performed accurately and with one touch operation. Things.

Further, since the fastener according to the present invention can maintain the function of supporting the supporting steel pipe, it has a function that does not require special supporting means for the cross beam to the concrete formwork which has been conventionally required. is there. In the unit formwork applied to the fastener according to the present invention, an oval connection hole is formed in one of the connection fins on both sides of the connection fin of the formwork. Even if there is a slight inconsistency, the attachment work of the fastener can be easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment.

FIG. 2 is an explanatory diagram of a use mode of an embodiment.

FIG. 3 is an explanatory diagram of a connection state of the embodiment.

FIG. 4 is an explanatory diagram of another embodiment.

FIG. 5 is an explanatory diagram of a connection state of another embodiment.

FIG. 6 is an explanatory diagram of a use mode of the fastener.

FIG. 7 is an explanatory diagram of another embodiment.

FIG. 8 is an explanatory view of a conventional fastener.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holder 2 Connecting shaft 3 Support 4 Support 5 Unit form 10 Fastener 11 (12) Holding plate 13 Connecting plate 14 Head plate 41 Connecting arm 42 Support arm 51 Connecting fin 52 Connecting hole 53 Oval connecting hole

Claims (3)

[Claims] 1. A holding plate which forms a U-shaped holding body, and a connecting plate between the two holding plates and one of the two holding plates is connected to a head plate extending from another holding plate. Forming a shaft, inserting the connection shaft into the connection hole of the connection fin of the unit form,
A fastener for a concrete form, wherein the connecting fins are gripped in a holding manner by the holding body to connect the unit forms. 2. A fastener comprising a support for supporting a supporting steel pipe on the holding body according to claim 1. 3. A unit form applied to the fastener according to claim 1, wherein an elliptical connecting hole is formed in one of the connecting fins formed on both side ends of the unit form. A unit formwork characterized by: