JPH074916U - Insert and concrete slab track members - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an insert having improved workability for embedding in a concrete member and having an excellent anchoring effect on concrete, and a concrete slab race member using the insert. [Structure] Ribs 2 and 3 that extend in the circumferential direction and the generatrix direction are provided on the outer peripheral surface, and one end of the female threaded portion 4 of the cylindrical body 1 having the female threaded portion 4 on the inner circumferential surface has a lower bottom surface on the inner circumferential surface. 5
The pipe fitting portion 6 having a conical surface is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an insert and a concrete slab race member using the insert.

[0002]

[Prior art]

 As a conventional steel insert 3, as shown in FIG. 6, a screw cylinder portion 31 and a seat plate portion 34 having a through hole 33 having an inner diameter suitable for the screw hole 32 of the screw cylinder portion are provided. There is one configured by welding 35 so that each through hole communicates. Further, there are inserts for side opening shown in FIG. 7 and FIG. 8. In the one shown in FIG. 7, a hook-shaped anchor 37 is projectingly provided on a horizontal female screw cylinder 36, and the one shown in FIG. A horizontal rod-shaped anchor 39 is projected from a horizontal female screw cylinder 38.

[0003]

[Problems to be solved by the device]

 Since the conventional insert is composed of the screw cylinder portion 31 and the seat plate portion 34, it is difficult to make the material uniform. Moreover, in manufacturing the same, the screw hole 32 of the screw cylinder portion 31 and the through hole 33 of the seat plate portion 34 are welded so as to be positioned on the same center line, but this centering work is complicated and the center of each through hole is complicated. If they are misaligned, it will be difficult or impossible to insert the bolts, which will reduce workability.

Further, welding distortion also occurs, which causes poor quality of the threaded portion, and also in this case, it becomes difficult to insert the bolt. Further, it is troublesome to process the protective cylinder fitting portion at the opening end of the screw hole 32. Further, since the insert has a large weight, it is not easy to handle, and since the outer diameter of the seat plate portion 34 is larger than the outer diameter of the screw cylinder portion 31, the seat plate portion 34 is inserted into the gap of the bar arrangement body 49. It is difficult to insert, and it cannot be inserted if the space between the reinforcing bars is narrow.

Further, when the insert is applied to a concrete slab race member made of a plate-shaped reinforced concrete member, the upper and lower positions are often reversed at the time of molding because various embedded metal fittings are attached to the mold. In this state, the seat plate portion 34 of the insert is on the upper side and the screw cylinder portion 31 is on the lower side. This plate-shaped reinforced concrete material is demolded by screwing a hook bolt into the insert, lifting it with a crane and pulling it out of the formwork.

When the plate-shaped reinforced concrete member is pulled out from the form, if the outer surface of the seat plate portion 34 is exposed on the upper surface of the reinforced concrete member and the adhesive force between the concrete and the insert is smaller than the pull-out force from the plate-shaped member form, There is a risk that only the insert will come out. Even if the seat plate is embedded in the plate member, the plate member has a through hole through which the insert communicates with the outside by the screw cylinder portion 34. Around the through hole The concrete part may be damaged and only the insert may come out.

Further, the insert shown in FIGS. 7 and 8 is composed of two members, and there is a problem in terms of structure manufacturing. The present invention has been proposed in view of the above problems of the prior art. The purpose of the present invention is to improve the workability of burying concrete members and to provide a simple structure with an excellent anchoring effect to concrete. The point is to provide an insert and a concrete slab race member using the insert.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the insert according to the present invention is a female threaded portion in a cylindrical body in which ribs extending in a circumferential direction and a generatrix direction are provided on an outer peripheral surface and a female threaded portion is provided on an inner peripheral surface. A pipe fitting portion having a lower bottom surface formed into a conical surface is provided on the inner peripheral surface of the one end portion.

Further, the reinforced concrete slab track member according to the present invention is a female threaded portion in a cylindrical body in which ribs extending in a circumferential direction and a generatrix direction are projected on an outer peripheral surface and a female threaded portion is provided on an inner peripheral surface. An insert having a pipe fitting portion whose lower bottom surface is formed into a conical surface is embedded at one end of the slab in a horizontal concrete slab in the thickness direction of the slab.

According to a third aspect of the present invention, ribs extending in the circumferential direction and the generatrix direction are projected on the outer peripheral surface of the cylindrical body with one end closed, and an insert having an internal thread portion on the inner peripheral surface is horizontally attached to the concrete slab. It is embedded in the slab and the other end is opened on the side surface of the slab.

[0011]

[Action]

 If the internal thread portion on the inner surface of the cylinder that forms the main body of the insert is provided over the entire length of the cylinder, there is a possibility that the internal thread end may be damaged due to impact, etc., making it impossible to tighten the bolts. In the insert according to the invention, a pipe fitting portion is provided on the inner peripheral surface of one end of the female screw portion, and the end portion of the female screw portion is removed, so that the bolt fastening due to the damage to the end portion of the bolt as described above can be performed. It eliminates the fear of becoming impossible. Thus, by making the bottom surface of the pipe fitting portion into a conical surface, when inserting a pipe into the insert, the conical surface slides to guide the pipe so that the pipe fits smoothly. It is fitted to the pipe and the center of the pipe and cylinder can be automatically adjusted. As described above, this pipe prevents damage to the female threads at the end of the insert and prevents concrete from flowing into the insert during concrete pouring.

Further, since ribs extending in the circumferential direction and the generatrix direction are projected on the outer peripheral surface of the cylindrical body of the insert, the external force applied to the insert through the bolts screwed to the insert Against the directional force, the ribs that extend in the circumferential direction on the outer peripheral surface of the cylinder oppose the contact surface of the concrete, and the rotational force, the ribs that extend in the generatrix direction on the outer peripheral surface of the cylinder contact the concrete contact surface. Resist and firmly anchor the insert in the buried position relative to the concrete member.

Since the concrete slab track member according to the present invention is constructed by embedding the insert in the concrete slab in the thickness direction of the slab, the insert and installation using the insert are performed. Insert a mold hanging bolt, a slab level adjustment bolt, etc., and when the slab track is suspended, the insert is integrally connected to the concrete part as described above, and the concrete part is destroyed by external force, In addition to the displacement and deformation of the insert being prevented, the rail fastening member and other accessory members can be easily attached using the insert.

According to a third aspect of the present invention, the insert is embedded in a concrete slab member so as to open to the side surface of the slab, and a formwork for pouring the slab concrete and other accessories are easily attached to the side surface of the member. It was made possible.

[0015]

【Example】

 The present invention will be described below with reference to the illustrated embodiments. Reference numeral 1 denotes a steel tubular body that constitutes the main body of the insert. Ribs 2 and 3 extending in the circumferential direction and the generatrix direction are projected on the outer peripheral surface of the tubular body 1, and an internal thread portion 4 is provided on the inner peripheral surface. It is included. The female threaded portion 4 is not provided over the entire length of the tubular body 1, and a pipe fitting hole 6 in which the lower bottom surface 5 is formed into a conical surface is formed on the inner peripheral surface of the end of the female threaded portion 4 in the tubular body 1. It is provided so that the resin pipe 41a is fitted therein.

A resin pipe 41b is fitted to the lower end of the tubular body 1 of the insert, and a boss 44 having an insertion hole 43 for the set bolt 42 is fitted to the lower end of the pipe 41b. 1. A resin pipe 41a is fitted into the pipe fitting hole 6 at the upper end portion of 1, and a seat plate 45 is applied to the upper end of the pipe 41a, and a set bolt 42 is attached to a bottom plate 47 of a form 46 (see FIG. 3). After inserting the seat plate 45, the pipe 41a, the tubular body 1, the pipe 41b, and the boss 44 into the hole 48, and screwing the tip screw portion, a plurality of inserts are temporarily attached to the bottom plate 47 of the form. Stop.

A reinforcing bar 49, in which a reinforcing bar T is assembled in a predetermined shape in advance, is hung in a mold 46 while avoiding an insert erected on a bottom plate 47 of the mold 46, and then concrete 50 is poured. To do. (See FIG. 4) At this time, the resin pipe 41a fitted to the upper end of the cylindrical body 1 of the insert prevents the pouring concrete 50 from flowing into the cylindrical body 1, while the pipe 41b. Holds the insert at a predetermined height. When the casting concrete solidifies and develops a predetermined strength, the set bolt 42 and the seat plate 45 are removed, a hook bolt (not shown) is screwed into the female screw portion 4 of the cylinder body 1, and the Then, the solidified concrete is lifted to the outside of the form 46 through the hook bolt to remove the mold, the boss 44 is removed, and thus the concrete slab raceway member 51 made of a reinforced concrete horizontal plate member is molded.

Then, as shown in FIG. 5, the adjusting bolt 53 ′ is inserted into the cylinder body 1 of the insert which is embedded in the slab raceway member 51 in the thickness direction of the member, and the bolt 53 ′ is screwed. The level of the slab raceway member 51 is adjusted by rotating the slab. (See FIG. 5) The pipes 41a and 41b may be fitted to the outer peripheral surface of the tubular body 1.

Reference numeral 11 denotes a horizontal insert cylinder. A rib 12 extending in the circumferential direction and a rib extending in the generatrix direction are provided on the outer peripheral surface of the cylinder 11, and the bottom portion is formed on the inner peripheral surface of the cylinder 11. The internal thread portion 14 is provided, and the end portion of the cylindrical body 11 is horizontally embedded and fixed in the slab track member 51, and the end portion of the cylindrical body 11 is opened on the side surface of the member 51. Then, the form 56 is set by a bolt 53 ″, for example, between the side surface of the member 51 and the base 54 via the suspending member 55, and the form 56, the slab raceway member 51, and the base 54 are appropriately arranged. Fill concrete and construct a slab track in which both are integrated.

The horizontal insert can also be used when a hook bolt is screwed to the insert and the concrete slab race member is erected or inverted by a crane.

[0021]

[Effect of device]

 As described above, the insert according to the present invention is provided with ribs extending in the circumferential direction and the generatrix direction on the outer peripheral surface of the cylindrical body having the female thread portion on the inner peripheral surface of the insert main body. Even if a large pulling force or rotation is applied to the insert, the insert is not displaced or deformed by the resistance due to the adhesive force acting between the ribs and the concrete, or is not pulled out from the concrete member in which the insert is embedded.

Further, since the inner peripheral female thread portion of the tubular body is not provided over the entire length of the tubular body, but the pipe fitting portion is provided on the inner peripheral surface of the one end portion of the tubular body, the female thread end portion may be damaged by an impact or the like. There is no risk of damage, and the lower bottom surface of the fitting part is formed into a conical surface, so when fitting a concrete entry prevention pipe to the insert in the same fitting part, the conical bottom surface Serves as a guide member for the pipe, and the pipe slides along the bottom surface of the pipe to smoothly fit into the fitting portion.

Further, since the insert is entirely composed of a single member and has no welded portion, it can be easily inserted into a pre-assembled bar arrangement body. As shown in Fig. 6, unlike the anchor with seat plate, there is no shortage of concrete around the bottom of the seat plate, it is structurally stable, and breaks even when a large axial load is applied. Since the insert is composed of a single member as compared with the conventional insert composed of a plurality of members shown in FIGS. 7 and 8, the structure is simple.

Since the insert according to the present invention is composed of a single tubular body as a whole, the insert can be easily set by inserting it between the reinforcing bars of a complicated bar arrangement. It is a thing. Since the concrete slab track member according to the present invention is constructed by embedding the insert configured as described above in a horizontal concrete slab in the thickness direction of the slab, as described above, There is a large adhesive force between the ribs in the generatrix direction and the concrete in the circumferential direction, and even if a large axial force is applied, the adhesive force between each rib and concrete is shared and resists this. The insert is not pulled out from the concrete slab race member, and further various mounting bolts and level adjusting bolts are inserted and attached by the insert.

According to a third aspect of the present invention, ribs extending in the outer peripheral direction and the generatrix direction are provided on the outer peripheral surface of the cylindrical body, and an insert having a screw portion inside is horizontally embedded in the concrete slab so as to open to the side surface. As a result, even when the horizontal insert is used and a large amount of force is applied to the side surface to hang it up, the insert does not separate from the concrete and exhibits stable performance.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of an insert according to the present invention in a partially cutaway view.

FIG. 2 is an exploded perspective view illustrating a state where an insert is set in a mold.

FIG. 3 is a schematic perspective view showing a relationship between a reinforcing bar assembly and an insert.

FIG. 4 is a partially cut side view showing a concrete filling state.

FIG. 5 is a cross-sectional view illustrating a usage state of the concrete slab track member.

FIG. 6 is a perspective view showing a part of a conventional insert, which is arranged in a thickness direction of plate-shaped concrete, in a cutaway manner.

FIG. 7 is a cross-sectional view of an example of a conventional insert arranged in a direction perpendicular to the thickness direction of a plate-shaped concrete member.

FIG. 8 is a cross-sectional view of another example of a conventional insert arranged in a direction perpendicular to the thickness direction of a plate member.

[Explanation of symbols]

 1 Cylinder 2 Rib 3 Rib 4 Female Threaded Part 5 Lower Bottom 6 Pipe Fitting Hole T Reinforcing Bar 11 Cylinder 12 Rib 13 Rib 14 Female Threaded Part 41 Resin Pipe 42 Set Bolt 43 Bolt Insertion Hole 44 Boss 45 Seat Plate 46 Form 47 Bottom plate 48 Bolt hole 49 Reinforcement body 50 Concrete 51 Concrete slab track member 52 Side plate 53 Mounting hole 53 'Adjustment bolt 54 Base 55 Suspension member 56 Formwork

Claims (3)

[Scope of utility model registration request] 1. A cylindrical body in which ribs extending in a circumferential direction and a generatrix direction are provided on an outer peripheral surface and a female screw portion is provided on an inner peripheral surface of the female screw portion. An insert having a pipe fitting portion formed on a surface thereof. 2. A cylindrical body in which ribs extending in a circumferential direction and a generatrix direction are projected on an outer peripheral surface and a female screw portion is provided on an inner peripheral surface of the female screw portion at one end portion thereof, and a lower bottom surface thereof is a conical surface. A concrete slab track member, wherein an insert having the formed pipe fitting portion is embedded in a horizontal concrete slab in the thickness direction of the slab. 3. A cylindrical outer peripheral surface of which one end is closed is provided with ribs extending in a circumferential direction and a generatrix direction, and an insert having an internal thread portion on an inner peripheral surface is horizontally embedded in the concrete slab. The concrete slab track member according to claim 2, wherein an end portion is opened to a side surface of the slab.