JP3112704U - Sleeve reinforcement bracket - Google Patents

Abstract

[PROBLEMS] To provide a simple structure that can be reused in place of a wooden frame, and can be put to practical use at a cost comparable to or lower than that of a wooden frame.
A pair of metal pad plates (14, 14) pressed against the inner peripheral surface of a sleeve, a total screw bolt (18) removably screwed to a flange nut (16) fixed inside the metal pad plate (12), and a metal pad plate (14) A shaft member fixed on the inside, one end rotatably attached to the shaft member, a nut member to which all screw bolts 18 are screwed are fixed to the other end, and the metal pad 14 is rotated as a fixed side. And a metal pipe member 20 for expanding and contracting the screw bolt 18. The shaft member has a guide groove on the outer peripheral surface, and an inner surface protrusion is formed by pushing deformation of the pipe wall surface at a position facing the guide groove in a state where the metal pipe member is fitted to the shaft member, and the inner surface protrusion is fitted to the guide groove. Thus, the pipe member is rotatably supported against the shaft member fixed to the metal backing plate.
[Selection] Figure 1

Description

The present invention relates to a sleeve reinforcing metal fitting that is attached to an iron plate sleeve that is installed to allow piping to pass through a partition wall during building construction and the like, and that retains its shape when concrete is cast.

Conventionally, when building a partition wall of a building, a cylindrical iron plate sleeve is assembled to a partition wall portion through which piping is passed when reinforcing bars are assembled. Such an iron plate sleeve is made of a thin iron plate, and if it is left as it is, it will be deformed by the load applied to the concrete. For this reason, a wooden frame is reinforced by putting it in an iron plate sleeve, and the wooden frame is removed after the concrete has hardened.
Japanese Patent Application Laid-Open No. 08-292776

  However, in the reinforcement of the steel sheet sleeve with such a conventional wooden frame, the wooden frame used to reinforce the steel sheet sleeve is removed at the stage when the partition work is completed, and as a result, a large amount of the removed wooden tree is removed. There is a problem that the frame is generated as waste, and the disposal work takes time and effort.

  In particular, in recent years, efforts have also been made to save resources by reducing the waste generated during construction work as much as possible by making it possible to reuse equipment used in construction work even at construction work sites. However, the wooden frame used to reinforce the sleeve is cut to the required length in the field work and set in the sleeve, so the wooden frame removed at the completion of construction cannot be reused. There is also a problem that there is no method other than treating as waste.

  On the other hand, it is also conceivable to use a telescopic tension rod shown in Patent Document 1 as a reinforcing member that replaces the wooden frame. However, this telescopic strut is a reinforcement of a resin sewage main pipe made of vinyl chloride or the like, and is made of a resin material including a threaded portion that can be stretched by screwing. Is complicated and large, and it is necessary to prepare a dedicated mold and resin molding, so there are many parts, it is complicated to assemble, the cost is too high compared to the conventional wooden frame, and practical application is difficult It is.

  In particular, there are many types of sleeves used for building partitions, and the diameters are generally in the range of 20 centimeters to 50 centimeters. When the diameters are increased, the telescopic tension rods are also increased in size and the cost is further increased. In addition, the use of synthetic resin as a reinforcing member is problematic in terms of strength, and in order to ensure the same strength as metal fittings, the wall thickness must be considerably increased, and punching with a hammer when removing. It is also assumed that it is not suitable as a reinforcing member for use at construction sites.

The present invention provides an all-metal sleeve reinforcing bracket that can be reused in place of a conventional wooden frame and has a simple structure that can be put to practical use at a cost comparable to or lower than that of a wooden frame. For the purpose.

  In order to achieve this object, the present invention is configured as follows. The present invention is a sleeve reinforcing bracket that supports a cylindrical iron plate sleeve from the inside, and is detachably attached to a pair of metal backing plates pressed against the inner peripheral surface of the sleeve and a nut member fixed to one inside of the metal backing plate. All screw bolt members to be screwed into the shaft, a shaft member fixed to the other inside of the metal backing plate, one end rotatably attached to the shaft member, and a nut member to which all screw bolts are screwed to the other end are fixed. A metal pipe member that expands and contracts all screw bolt members by rotating the metal backing plate as a fixed side, and the shaft member includes a guide groove on the outer peripheral surface, and the metal pipe member is fitted to the shaft member. An inner surface protrusion is formed by pressing deformation of the pipe wall surface at a position opposite to the guide groove, and the pipe member is rotatably detached from the shaft member fixed to the metal backing plate by fitting the inner surface protrusion to the guide groove. Characterized in that the fit support.

  Here, all the screw bolts have a predetermined length adapted to the inner diameter of the sleeve. Further, the nut member is caulked and fixed to one side of the metal plate, and the shaft member is caulked and fixed to the other side of the metal plate.

Further, the shaft member is provided with an open groove that opens the guide groove at the shaft end in the axial direction, and the metal pipe member can be separated from the shaft member by detaching the inner surface protrusion of the metal pipe member through the open groove. And Further, the metal pipe member is formed with a through hole for inserting a tool in the middle portion of the pipe in a direction perpendicular to the axis.

  According to the present invention, a metal pad with a nut member and a metal pad with a shaft member that rotatably supports the metal pipe member and embeds the nut member at the end of the pipe have a length suitable for the sleeve diameter. By connecting with all the screw bolts and turning the metal pipe member with the metal backing plate side as the fixed side, all the screw bolts can be taken in and out of the metal pipe member to make the interval of the metal backing plate expand and contract. Even if it is made of reinforcing metal, it achieves the cost equivalent to or lower than the conventional wooden frame for reinforcement, and it is possible to use the sleeve metal fitting of the present invention instead of the conventional wooden frame. .

  In particular, in the sleeve reinforcing bracket of the present invention, an annular guide groove is formed on the outer periphery of the shaft member that is caulked and fixed to the metal backing plate as a pipe rotation structure that supports the metal pipe member so that it can be rotatably supported on the metal backing plate. A metal pipe member is formed on the shaft member by forming an inner surface protrusion that enters the guide groove by punching the portion of the pipe wall facing the annular guide groove in a state where the metal pipe member is fitted into the shaft member. The structure for preventing the pipe from rotating freely is realized with a very simple structure, and the cost of the pipe rotating structure can be reduced, so that the cost of the entire fitting can be reduced.

  The reason why the sleeve reinforcing bracket of the present invention can be reduced in cost compared to the wooden frame is that the wooden frame is disposable, but the sleeve reinforcing bracket of the present invention can be reused repeatedly, for example, in the field. Compared to the cost of a wooden frame that was disposable every time, the cost of the sleeve reinforcing bracket of the present invention is only at the first introduction even if the number of uses increases, and the cost can be greatly reduced compared to the wooden frame in total. .

  In order to facilitate this reuse, the sleeve reinforcing bracket of the present invention rotates the metal pipe member so that all screw bolts are extended when attaching to the sleeve, and turns the metal pipe member reversely when removing the screw. It only needs to be shortened, and it is easier and more efficient than the reinforcement and removal by a wooden frame.

  Further, since the sleeve reinforcing metal fitting of the present invention can be reused, the waste generated by the reinforcement by the conventional wooden frame is not generated, and the resource can be saved.

  Furthermore, all screw bolts used in the present invention are those that are commercially available as standard products, cut to an appropriate length according to the sleeve diameter, and all screw bolts are used as field work using a dedicated cutter. By making it possible to easily produce the required dimensions and using commercially available standard products, the cost can be reduced and the length required for field work can be reduced as in the case of conventional wooden frames. There is an advantage that a screw shaft can be prepared and used.

  In addition, by forming an open groove extending in the axial direction in the annular guide groove of the shaft member in the axial direction, the metal pipe member can be attached to the metal contact plate by aligning the inner surface protrusion of the metal pipe member at the position of the open groove. It can be removed from the shaft member fixed to the metal plate, and if necessary, it is possible to disassemble and assemble the metal pipe member and the metal backing plate to which the shaft member is fixed. Will improve.

Furthermore, the metal pipe member is formed with a tool through-hole for inserting a tool in the middle of the pipe in a direction perpendicular to the axis, so that the metal pipe member is basically manually attached when setting or removing the sleeve. It is only necessary to turn it, but if it is strongly supported or cannot be moved by hand during removal, it can be easily turned by inserting a screwdriver or the like into the tool through-hole penetrating in the lateral direction of the metal pipe member.

  FIG. 1 is an explanatory view showing an embodiment of a sleeve reinforcing metal fitting according to the present invention. FIG. 1 (A) shows a front view, FIG. 1 (B) shows a side view, and FIG. 1 (C) shows a bottom view. ing.

  In FIG. 1, a sleeve reinforcing metal fitting 10 of the present invention includes a pair of metal contact plates 12 and 14 that are disposed relative to the inside of a cylindrical sleeve, for example, an iron plate sleeve, and a flange as a nut member inside one of the metal contact plates 12. The nut 16 is fixed by caulking or the like, and one end of the entire screw bolt 18 is screwed and fixed to the flange nut 16.

  A metal pipe member 20 is rotatably supported by the other metal contact plate 14 with respect to a fixed shaft member, which will be described later. The metal pipe member 20 is prevented from coming off from the shaft member fixed to the metal contact plate 12 side by an inner surface protrusion 30 which is driven and deformed by a punch or the like.

  All screw bolts 18 are screwed into the upper part of the metal pipe member 20. As will be described later, a flange nut as a nut member is welded and fixed to the inner side of the end of the screw pipe 18 on the side of the metal pipe member 20. The length of all the screw bolts 18 is set such that the distance between the metal contact plates 12 and 14 can be adapted to the inner diameter of the iron plate sleeve to be reinforced in a state where the screw bolts 18 are screwed into the metal pipe member 20.

  For example, the inner diameter of the iron plate sleeve is set to a predetermined dimension in a range of approximately 20 centimeters to 50 centimeters. For example, the inner diameter of the sleeve is 20 centimeters, 30 centimeters, 40 centimeters, and 50 centimeters. By preparing all the screw bolts 18 having a length suitable for these four types of sleeve inner diameters, it is possible to prepare the sleeve reinforcement fitting 10 suitable for sleeves having different inner diameters.

  FIG. 2 is an explanatory view of a use state of the sleeve reinforcing metal fitting 10 according to the present invention. In FIG. 2, an iron plate sleeve 24 is fixed at a position penetrating a pipe of a reinforcing bar assembled in a building partition work for a building, and the sleeve reinforcing metal fitting 10 of the present invention is attached to the inside in a fixed state with respect to the reinforcing bar.

  The sleeve reinforcing bracket 10 is attached by turning the metal pipe member 20 so that all screw bolts 18 are screwed into the pipe so that the distance between the metal contact plates 12 and 14 is smaller than the inner diameter of the metal sleeve 24 and is inserted in this state. If the positioning is completed, the metal pipe member 20 is rotated in the reverse direction to extend the entire screw bolt 18 and press the metal contact plates 12 and 14 against the inner surface of the metal sleeve 24, thereby The shape of the metal sleeve 24 can be maintained against the load applied when the concrete is poured.

  After the concrete has been poured and solidified, the metal pipe member 20 is rotated in the direction in which all the screw bolts 18 are pulled into the pipe to release the tension state of the inner surfaces of the metal contact plates 12 and 14 with respect to the metal sleeve 24, The obsolete sleeve reinforcement member 10 is removed and then reused at another site.

  FIG. 3 is an explanatory view of the connection structure of one metal plate 12 and all screw bolts 18 in the present invention. In FIG. 3, the metal contact plate 12 is formed in an arc shape along the inner peripheral surface of the iron plate sleeve when viewed from the front, and the center portion is pushed inward and deformed by pressing or the like to form a recessed portion 12 a. ing.

  A through hole 26 is formed in the recessed portion 12a, and a flange nut 16 having a small diameter portion 16a formed at the tip from the inside is inserted into the through hole 26, and the crimped portion 16b is formed by performing crimping from the opposite side. It is formed and fixed to the metal contact plate 12. In this way, in the flange nut 16 fixed to the metal cover plate 12, all screw bolts 18 are fixed by screwing from the inside.

  FIG. 4 is an explanatory view of a pipe rotation mechanism with a metal pipe member of a shaft member fixed to the other metal cover plate 14 in the present invention. In FIG. 4, the metal contact plate 14 is formed by pressing the outer center inward to form a recess 14 a, and a through hole 34 is formed in the center of the recess 14 a. The tip is projected outward through the small-diameter portion 28a of the member 28, and the crimped portion 28 is formed and fixed by crimping the tip projection.

  The shaft member 28 has an annular guide groove 30 formed on the outer periphery on the tip side. An inner surface protrusion 32 is formed by punching with a punch or the like on the pipe wall portion of the metal pipe member 18 corresponding to the annular guide groove 30, and the inner surface protrusion 32 enters the guide groove 30, so that the metal pipe 18 with respect to the shaft member 28. Is supported so that it can rotate freely.

  Further, a flange nut 36 is incorporated inside the tip of the pipe member 18, and is fixed by a welded portion 38 formed by spot welding or the like. As shown in FIG. 1, the lower end of the flange nut 36 is screwed with all screw bolts 18 fixed to the metal cover plate 12 side.

  FIG. 5 is an exploded view of the pipe rotation mechanism of FIG. 4 and clarifies the fixing structure of the shaft member 28 to the metal cover plate 14. The shaft member 28 has an annular guide groove 32 formed on the outer periphery of the tip, and a blind hole 33 facing the lower side is formed inside.

  6 is an exploded view of the metal cover plate 14 and the shaft member 28 in FIG. 5. The shaft member 28 is in a state before being fixed to the metal cover plate 14 by caulking or the like, and a small-diameter portion 35 is formed in the lower portion. 5 is inserted into the through hole 34 of the metal cover plate 14 of the small diameter portion 35 and protrudes downward, and the protruding portion on the lower side of the small diameter portion 35 is crimped to form the metal cover plate 14 as shown in FIG. The shaft member 28 is fixed by forming a crimping portion 28a.

  As described above, in the sleeve reinforcing metal fitting 10 of the present invention, the metal cover plate 12 with the flange nut 16 fixed to the inside, the metal cover plate 14 with the metal pipe member 20 rotatably retained by the shaft member 28, and the whole. It is composed of three elements, screw bolts 18 and is very simple in structure. In particular, a pipe rotation mechanism for instructing to prevent the metal pipe member 20 from coming off with respect to the metal coating plate 14 is fixed to the metal coating plate 14. When the metal pipe 20 is rotatably fitted in the annular guide groove 32 of the shaft member 28, the portion of the pipe calendar corresponding to the annular guide groove 32 is driven by a punch or the like to form the inner protrusion 32. Both functions of retaining can be easily realized. Thus, the cost of the sleeve reinforcing metal fitting 10 as a whole can be greatly reduced by simplifying the pipe rotating mechanism.

  The all screw bolts 18 used in the sleeve reinforcing bracket 10 of the present invention are those that are commercially available as standard products, and conform to the inner diameter of the iron plate sleeve that uses the sleeve reinforcing bracket 10 of the present invention. It is possible to prepare the sleeve reinforcing metal fitting 10 of the present invention suitable for various sleeve inner diameters by simply cutting all the commercially available screw bolts in length, and also in this respect, the cost and the number of manufactured all screw bolts can be greatly reduced.

  Furthermore, the advantage of using all screw bolts 18 is that they are used in field work by cutting all screw bolts obtained as standard products at the construction site, for example, all screw bolts of 2 meter size using a dedicated cutter. .

  In the situation of using the whole screw bolt 18 in the field, for example, the inner diameter of the iron plate sleeve installed in the field is significantly different from the size of the sleeve reinforcing bracket 10 of the present invention prepared for reinforcement, When it cannot be used as it is, all screw bolts prepared in the field are cut to a size suitable for the inner diameter of the iron plate sleeve to which the sleeve reinforcing metal fitting 10 of the present invention is attached, and the cut all screw bolts are all screw bolts of the present invention. As a result, it is possible to prepare the sleeve reinforcing metal fitting 10 of the present invention suitable for the inner diameter of the steel sheet sleeve required for field work.

  FIG. 7 is an explanatory view showing another embodiment of the present invention in which the shaft member and the pipe member of the metal cover plate can be separated, and FIG. 7 (A) shows a 20A / A cross section of the pipe member. FIG. 7B is an exploded view of the pipe rotating mechanism, and FIG. 7C is a plan view of the shaft member 28.

  In the assembly exploded view of the pipe rotation mechanism of FIG. 7B, the shaft member 28 fixed to the metal cover plate 14 by the crimping portion 28a opens the groove to the outside with respect to the annular guide groove 30 formed on the outer periphery of the inner tip. An open groove 42 is formed in the axial direction.

  The shaft member 28 is instructed to prevent the shaft member 28 from rotating freely by forming the inner surface protrusion 32 by punching or the like in the portion of the pipe wall facing the annular guide groove 32 with the metal pipe member 20 inserted.

  In such a rotation prevention state of the metal pipe member 20 with respect to the shaft member 28, the guide groove 32 is positioned in the annular guide groove 32 because the open groove 42 communicating with the outside in the axial direction is formed. When the metal pipe member 20 is pulled upward in a state where the inner surface protrusion 32 of the metal pipe member 20 is rotated and aligned with the position of the open groove 42, the inner surface protrusion 32 passes through the portion of the open groove 42 and the metal is removed from the shaft member 28. The pipe member 20 can be removed.

  Of course, after the metal pipe member 20 is removed, the inner pipe protrusion 32 is again positioned so as to be in contact with the open groove 42 of the shaft member 28, thereby instructing the shaft member 28 to prevent the metal pipe member 20 from coming off freely. Can do.

  Since the metal pipe member 20 can be separated from the shaft member 28 fixed to the metal cover plate 14 in this way, for example, the metal pipe member 20 and the cover plate 14 side of the sleeve reinforcing bracket 10 of the present invention are damaged by repeated use. In this case, the damaged member can be replaced with a new one.

  FIG. 8 shows another embodiment of the sleeve reinforcing metal fitting 10 according to the present invention in which a tool through hole is provided in a metal pipe member. FIG. 8 (A) is a front view and FIG. 8 (B) is a side view. In this embodiment, the tool through hole 42 is formed at a substantially central position of the metal pipe member 20 perpendicular to the axial direction.

  When the sleeve reinforcing bracket 10 of the present invention is attached to the iron plate sleeve 24 as shown in FIG. 2 by forming the tool through hole 42 in the metal pipe member 20, the entire screw bolt 18 is basically turned by turning the metal pipe member 20. The metal contact plates 12 and 14 are stretched and attached so that the metal contact plates 12 and 14 are stretched. However, when the strength of the metal contact plates 12 and 14 is to be increased, a screwdriver 42 is provided in the tool through hole 42 provided in the metal pipe member 20. By inserting and turning, the required high tensile strength can be easily obtained.

  Further, when removing the sleeve reinforcing bracket 10 of the present invention attached to the iron plate sleeve 24 after completion of the concrete pouring, the metal pipe member 20 is easily turned even if it is turned by hand because it receives a load due to the concrete pouring. In such a case, for example, a screwdriver is inserted into the tool through hole 42 of the metal pipe member and turned, so that the metal pipe member 20 can be easily turned to loosen and remove all the screw bolts 18.

  In the above embodiment, the inner surface protrusion 32 is formed in one place as the inner surface protrusion 32 on the metal pipe member 20 side with respect to the annular guide groove 30 of the shaft member 28. The inner surface protrusion 32 may be formed at a plurality of locations as necessary. Further, in the above-described embodiment, the blind hole 33 is formed as the shaft member 28, but it goes without saying that a through hole may be used instead of the blind hole 33. Furthermore, the tool attachment holes 42 provided in the metal pipe member shown in the embodiment of FIG.

The present invention includes appropriate modifications that do not impair the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

Explanatory drawing which showed embodiment of the sleeve reinforcement metal fitting by this invention Explanatory drawing of the state of use of the sleeve reinforcement bracket according to the present invention Explanatory drawing of the connection structure of one metal backing plate and all screw bolts in the present invention Explanatory drawing of a pipe rotation mechanism with the metal pipe member of the shaft member fixed to the other metal backing plate in this invention Assembly exploded view of the pipe rotation mechanism of FIG. FIG. 5 is an exploded view of the metal backing plate and shaft member in FIG. Embodiment capable of separating the shaft member of the metal backing plate and the metal pipe member Explanatory drawing of other embodiment of the sleeve reinforcement metal fitting by which this invention provided the tool through hole in the metal pipe member

Explanation of symbols

10: Sleeve reinforcement metal fittings 12, 14: Metal plate 12a, 14b: Recessed portion 16, 36: Flange nut (nut member)
16a, 35: Small diameter portions 16b, 28a: Caulking portion 18: Full screw bolt 20: Metal pipe member 24: Iron plate sleeve 26, 34: Through hole 28: Shaft member 30: Annular guide groove 32: Inner projection 33: Blind hole 38: Weld fixing part 40: Open groove 42: Tool through hole

Claims (5)

In the sleeve reinforcement bracket that supports the cylindrical iron plate sleeve from the inside,
A pair of metal backing plates pressed against the inner peripheral surface of the sleeve;
An all screw bolt member removably screwed to a nut member fixed to one inner side of the metal pad,
A shaft member fixed inside the other of the metal pad,
A metal that has one end rotatably attached to the shaft member, a nut member that is screwed to the entire screw bolt to the other end, and a metal member that extends and contracts the entire screw bolt member by rotating the metal backing plate as a fixed side. A pipe member;
With
Further, the shaft member includes a guide groove on an outer peripheral surface, and an inner surface protrusion is formed by pressing deformation of a pipe wall surface at a position facing the guide groove in a state where the metal pipe member is fitted to the shaft member. A sleeve reinforcing bracket, wherein the pipe member is rotatably supported by a shaft member fixed to a metal backing plate by fitting a protrusion into a guide groove.
2. The sleeve reinforcing bracket according to claim 1, wherein the all screw bolts have a predetermined length adapted to the inner diameter of the sleeve.
2. The sleeve reinforcing metal fitting according to claim 1, wherein the nut member is crimped and fixed to one side of the metal backing plate, and the shaft member is crimped and fixed to the other side of the metal backing plate.
2. The sleeve reinforcing bracket according to claim 1, wherein the shaft member includes an opening groove that opens the guide groove at a shaft end in an axial direction, and an inner surface protrusion of the metal pipe member is detached through the opening groove. 3. A metal sleeve member can be separated from the shaft member.
  2. The sleeve reinforcing metal fitting according to claim 1, wherein the metal pipe member is formed with a tool through hole for inserting a tool in an intermediate portion of the pipe in a direction perpendicular to the axis.

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