Concrete form spacing fixture

• US 5,761,874 A
• Filed: 08/21/1996
• Issued: 06/09/1998
• Est. Priority Date: 08/30/1995
• Status: Expired due to Fees

• Current Assignee: Yoshiyuki Hayakawa
• Original Assignee: Yoshiyuki Hayakawa
• Inventors: Hayakawa, Yoshiyuki
• Primary Examiner(s): Friedman, Carl D.
• Assistant Examiner(s): HORTON, YVONNE MICHELE
• Application Number:
  US08/700,897
• Time in Patent Office: 657 Days
• Field of Search: 52/698, 52/699, 52/700, 52/561, 52/562, 52/564, 249/40, 249/43
• US Class Current: 52/701
• CPC Class Codes: E04G 17/06 Tying means; Spacers ; Devices for extracting or inserting wall ties E04G17/047 takes precedence; permanent forms for walls, e.g. with ties E04B2/86
• CPC Class Codes: E04G 17/0658 remaining completely or partially embedded in the cast material

Abstract

A concrete form spacing fixture comprises a bar type separator having a prescribed length which is provided with a male screw on its end portion, an attachment which is provided with a concave part having an open end and so formed that the open end of the concave part defines an end surface perpendicular to the longitudinal direction of the separator in a state fixed to the end portion of the separator, and a fastening member having a female screw forming part provided with a female screw to be fitted with the male screw of the separator with an outer diameter smaller than an opening diameter of the open end of the concave part of the attachment on an end thereof so that a flange type stop part is provided on a base portion of the female screw forming part. According to this structure, no male screw is inserted in a hole of a form panel, whereby the form panel is prevented from breakage caused by a bite of a thread. Consequently, workability in assembling of a concrete form is improved while long-term reuse of the form panel is enabled.

Claims

1. A concrete form spacing fixture comprising:

an elongated separator of a prescribed length and provided with a male screw on its end portion;

an attachment having a concave part open on a first end, such that an open end of the concave part defines an end surface perpendicular to the longitudinal direction of the separator in a state fixing a second end of the attachment to the end portion of the separator; and

a fastening member having a male screw on one end and a female screw forming part on the other end provided with a female screw to be fitted with the male screw of the separator, the female screw forming part being of an outer diameter smaller than the opening diameter of the open end of the concave part of the attachment and a stop part having a diameter enlarged to form a flange provided on a base portion of the female screw forming part, wherein

the female screw forming part of the fastening member is adapted to be inserted in a hole of a concrete form and the male screw of the separator is to be fitted with the female screw of the fastening member and the inner side of the concave part of the attachment being fixed to the end portion of the separator in mounting on the concrete form, thereby holding the concrete form by the open end of the attachment and the stop part of the fastening member for fastening/fixing the same.

2. The concrete form spacing fixture in accordance with claim 1, being provided with a waterproof flange part having a diameter being enlarged perpendicularly to the longitudinal direction of said separator on said second end of said attachment.

5. The concrete form spacing fixture in claim 1, wherein said attachment having a concave part open on a first end is threaded on a second end.

3. A concrete form spacing fixture comprising:

an elongated separator of a prescribed length and provided with male screws on both end portions;

a pair of attachments, each having a closed end and an open end and being in the form of a truncated cone, with diameters gradually increasing from said closed end toward the open end and, at the closed end, receiving a male screw of the separator; and

a pair of fastening members, each having a male screw on one end and a female screw forming part on the other end provided with a female screw to be fitted with a male screw of the separator, the female screw forming part being of an outer diameter smaller than the opening diameter of the open end of each said attachments, and a stop part of a diameter enlarged to form a flange provided on a base portion of the female screw forming part, wherein the male screws of the separator are of prescribed lengths greater than the lengths of the closed ends of the attachments and shorter than the distance between inner surfaces of said closed ends and the open ends of the attachments, and

the female screw forming parts of the fastening members are adapted to be inserted in holes of a concrete form and the pair of male screws of the separators are to be fitted with and clamped to the female screws of the fastening members in mounting on the concrete form, thereby fastening/fixing the stop parts and the open ends of the attachments to each other while holding the concrete form.

4. The concrete form spacing fixture in accordance with claim 3, wherein the end opposite from the open end of each attachment is provided with a waterproof flange part having a diameter enlarged perpendicularly to the longitudinal direction of the separator.

6. The concrete form spacing fixture in claim 4, wherein said pair of attachments each having an open end also have another end that is threaded.