JP4791879B2 - Insert with cap - Google Patents

Description

  The present invention attaches a cap to an insert embedded in the surface of a concrete product, particularly a lifting hole formed at the base end, in order to lift a concrete product frequently used in civil engineering or construction at a manufacturing site or construction site. Related to the cap.

  Because concrete molded products such as U-shaped grooves, concrete panels, and tetrapots are heavy, they are joints called inserts near the surface of concrete products to be transported from the manufacturing site or suspended by installation at the construction site. A member is embedded and a hanging tool such as an I-bolt is connected to the insert.

  As this insert, a lifting tool insertion hole is formed inside the cylindrical body, a lifting tool engagement hole is formed bulging at the back of the lifting tool insertion hole, and the boss portion outside the lifting tool insertion hole is lifted. A tapered portion is formed in the intermediate portion of the hollow cylindrical body (for example, see Patent Document 1), and a nut mechanism for connecting a lifting device is fixed inside the tapered portion, and has a smaller diameter than the tapered portion. There is known one in which the inside of the cylindrical body is a lifting tool insertion hole (see, for example, Patent Document 2).

Since the inserts shown in Patent Documents 1 and 2 are provided with the lifting tool insertion hole opened on the surface of the concrete product, after the insert is embedded in the concrete product, the cap is attached to the cap mounting hole, Dust and the like are prevented from entering, and as such a cap, a cylindrical cap body inserted into a cylindrical insert embedded in a concrete product, and an outer periphery of the opening of the cap mounting hole outside the insert are provided. Covered with a flange provided on the surface of the concrete product and provided with a leaf spring on the outside of the cap body (for example, see Patent Document 3), or a cylindrical shape formed in a U-shaped cross section and embedded in the concrete product (See, for example, Patent Document 4) that covers the same insert with the surface of a concrete product.
JP-A-11-190318 JP 2000-176924 A JP 2002-213023 A JP-A-10-166347

  Concrete products installed at the construction site using buried inserts will prevent the internal contamination of the insert or give an aesthetic appearance by attaching a cap to the cap mounting hole of the insert as described above. Building structures using concrete panels have become obsolete, and the installation of concrete products can be distorted due to shaking of the grounding surface, etc., and some impact force can be applied to the concrete products to cause damage. In this case, it is necessary to remove the cap from the cap mounting hole and lift the concrete product again to change the position or replace it with a new one.

However, since none of the caps of Patent Documents 3 and 4 is premised on removal from the cap mounting hole, the removal work is made difficult. For example, in the cap of Patent Document 3, there is no tool hanging hole for removal, and the leaf spring of the cap body fitted inside the insert becomes a large resistance at the time of removal, which requires a lot of work time. In addition, the cap of Patent Document 4 is set flush with the surface of the concrete product, so that it is forced to be opened with a sharp blade or the like, and the removal operation is difficult and the cap cannot be reused.
Further, in the cap of Patent Document 3, since the flange portion is exposed on the surface of the concrete product, an external force acts on the flange and the portion is chipped, or the cap itself protrudes and cannot be reused like the cap of Patent Document 4. In particular, in concrete products such as side groove lids through which people and cars (chairs) pass, caps that do not protrude from the surface are adopted from the viewpoint of barrier-free, and are difficult to remove.

  The present invention has been made in the background of such circumstances, and it is an object of the present invention to provide an insert with a cap that is not only easy to attach and detach to and from a cap mounting hole, but also can be used repeatedly with increased reuse value. To do.

  The insert with a cap which is the present invention made to solve the above-mentioned problem is for inserting a lifting device having a cap mounting hole formed in the base end face and continuously having a T-shaped tip at the back thereof. A groove-like lifting tool insertion hole is formed through the top wall from the base wall to form a back hole portion that allows the locking projection formed at the tip of the lifting tool to rotate at the tip of the top wall. An insert body in which the cap mounting hole is embedded flush with a concrete product having a lifting boss with the top wall as a locking portion of the locking projection, and the cap mounting hole is substantially flush with the cap mounting hole. In the insert with a cap formed of a cap, the cap has a tool groove for turning on the base end surface and a circular outer periphery of the body, and is rotatably mounted in the cap mounting hole. Base When the cap is rotated in a state where the distal end surface has a circular-arc or triangular-shaped protrusion that fits into the formed insertion hole and is attached to the cap mounting hole, the protrusion It is characterized in that the cap rides on the base end wall of the boss portion and the cap itself is pushed out of the cap mounting hole by the amount of fitting into the insertion hole formed at the base end of the boss portion of the protrusion. Further, if the turning tool groove formed in the base end surface of the cap is for at least one of a screwdriver or a coin, the removal work can be easily performed without a special tool.

  The insert with a cap of the present invention is fitted into the cap mounting hole by fitting the protrusion on the tip end surface of the cab into the lifting tool insertion hole and soaking. The outer surface of the cap fitted in the cap mounting hole is flush with the surface of the concrete product or within the cap mounting hole, and the cap when installed is the base end surface of the insert body, that is, the surface of the concrete product when embedded. Because it is not exposed to light, there is no worry of people crawling or being damaged by external forces. Further, the shape of the cap may be either a columnar shape or a cylindrical shape as long as it is rotatable on a horizontal plane. The protrusion on the tip of the cap has an inverted triangle shape, an arc shape, or other protrusions that are easy to run from the lifting tool insertion hole of the boss to the base end when rotating, or a protrusion that continues in the radial direction. The fitting length of the protrusion into the cap mounting hole is the length in the cap removal direction.

  In addition, when removing the cap fitted in the cap mounting hole, the cap is rotated in either the left or right direction (if the inclined surface or half of the protrusion is provided on one side, move to the formation side. ), The protrusion on the inner surface of the cap rides on the base end surface of the boss formed on the insert body and pushes the cap to the outside of the cap mounting hole, and the outer surface of the cap is the base end surface of the insert body, that is, embedded When protruding, it protrudes outside the surface of the concrete product. Thereby, an operator can remove easily by holding | griping this protrusion part. The amount of rotation when removing the cap may be within a range of 90 degrees at the maximum depending on the shape of the lifting tool insertion hole provided in the insert boss portion in the radial direction and the protrusion having an arcuate or triangular cross section.

  Further, the cap mounting hole may be formed as a cap mounting hole by integrally providing a cylindrical portion outside the boss portion of the insert. However, a space portion made of a concrete product is provided outside the boss portion of the insert to cap the cap mounting hole. It can also be used as a mounting hole, and in order to easily remove the cap, the outer surface of the cap may be roughened. However, the cap can be removed more easily by forming a tool groove. . The tool groove can be shaped to fit a plus or minus screwdriver or a shape that allows coins to enter. Furthermore, when the outer side surface of the cap is located inside the surface of the concrete product, the protruding knob portion can be provided in a range not protruding from the surface of the concrete product.

  According to the insert with a cap of the present invention, it is possible to easily remove the cap from the cap mounting hole when re-suspending the concrete product in a short time as well as mounting the cap in the cap mounting hole. Can be used. In addition, the cap is not exposed to the surface of the concrete product through the lifting tool insertion hole, so that there is no concern about dust clogging or contamination.

Embodiments of the present invention will be described below in detail with reference to the drawings.
1 is an exploded perspective view, FIG. 2 is an external view of the insert body, FIG. 3 is a plan view of the insert body shown in FIG. 2, FIG. 4 is a cross-sectional view of the insert body with a cap attached, and FIG. FIG. 6 is a sectional view of the cap.

  The cap-equipped insert 1 according to the present invention has a bottomed cylindrical insert body 2a formed of an appropriate synthetic resin that is hard and mechanically resistant, such as an ABS resin or a PP resin, like the conventional one, A cap mounting hole 3 is formed in the distal end surface of the insert body 2a, and a boss portion 2d having a lifting tool engaging hole 4 is formed in the back thereof. In the vicinity of the tip portion as a stopper when embedded in a concrete product. Further, triangular reinforcing ribs 2c are provided at equal intervals in the radial direction between the disc-shaped flange 2b and the upper opening edge.

The cap mounting hole 3 is formed in a cylindrical space that opens at the base of the insert body 2a. The boss 2d is connected to the back side of the cap mounting hole 3, and further to the back side of the boss 2d. A suspension engaging hole 4 is formed toward the front. The boss 2d is an arc-shaped column that is located in the middle of the insert body 2a and is divided into two arcs by a lifting tool insertion hole 6 penetrating in the vertical direction, and a base of the cap 5 accommodated in the cap mounting hole 3 It has become.
The lifting tool insertion hole 6 includes a long hole 6a extending over the entire inner radial direction of the insert main body 2a and an arc hole 6b having the central axis of the insert main body 2a as a fulcrum. The mounting hole 3 communicates with the hanger engaging hole 4. The hanger engaging hole 4 is a back hole formed between the front end wall 2e of the insert body 2a and the boss portion 2d and the back side of the arc-shaped column body into which the boss portion 2d is divided in a diagonal position. It communicates with the department.

  The insert 1 configured as described above has an upper opening edge that is an upper surface opening of the cap mounting hole 3 flush with the upper surface of the concrete product K1 when the insert body 2a is molded into the concrete product K. It is embedded in alignment and has the same shape as the elongated hole 6a of the lifting tool insertion hole 6 at the tip of the shaft rod having the same diameter as that of the arc hole 6b of the lifting tool insertion hole 6 in the lifting tool (not shown) of the concrete product K. In order to lift the concrete product K, the shaft rod and the locking rod of the lifting tool are inserted into the lifting tool insertion hole 6 of the insert 1, and the low wall is used. The concrete bar K can be lifted by positioning the locking bar between 2e and the boss 2d and rotating the shaft bar about 90 degrees to engage the locking bar with the lifting tool engaging hole 4. (Not shown).

  On the other hand, the cap 5 mounted in the cap mounting hole 3 has a bottomed cylindrical shape in which the base end surface of the cylindrical body is closed with a plate member, and the height thereof is set to the same length as the cap mounting hole 3 of the insert body 2a. Has been. A pair of protrusions 5a and 5a are provided to protrude from the front end surface of the cylindrical body, and a tool hook groove 7 formed in a cross shape in which two grooves 7a and 7b intersect each other on the base end surface. Is formed in a wide and long arc shape for coins, and the other groove 7b is formed in a narrow and short shape for a minus driver or a plus driver. Further, the protrusions 5 a and 5 a on the front end surface of the cap 5 are formed in an inverted triangle, and the base portion of the inverted triangle connected to the lower surface of the cylindrical body is formed to have the same width as the elongated hole 6 a of the lifting tool insertion hole 6. Thus, when the cap 5 is mounted in the cap mounting hole 3 of the insert body 2a, the protrusions 5a, 5a are accommodated in the long hole 6a of the lifting tool insertion hole 6 without rattling. The tool hanging groove 7 is formed in a cross shape in which the two grooves 7a and 7b are crossed, and one groove 7a is formed in a wide arc shape for coins, and the other groove 7b is a minus driver or plus It is narrow and short for drivers.

  The cap 5 of this embodiment configured as described above suspends the protrusions 5a and 5a after the concrete product K is moved to a storage location or after installation at a construction site, and after removing a lifting tool (not shown). It is mounted in the cap mounting hole 3 of the insert 1 while being fitted into the long hole 6 a of the tool insertion hole 6. Since the height of the cap 5 is set to the same length as the cap mounting hole 3 of the insert 1, the cap 5 is positioned flush with the upper surface of the concrete product K together with the insert 1, so that it may be damaged by external force. It is extremely rare and can be used as a barrier-free material, effectively preventing dust inside the insert 1 for a long period of time.

  When the installed concrete product K needs to be lifted again by replacement or movement, a coin, a flat-blade screwdriver, a flat-blade screwdriver, or the like is appropriately inserted into the tool hook groove 7 on the top surface of the cap 5 attached to the cap mounting hole 3. When a simple tool is inserted and rotated in either the left or right direction, the inclined surfaces of the triangular protrusions 5a and 5a fitted in the elongated hole 6a of the lifting tool insertion hole 6 gradually move the upper edge of the elongated hole 6a. As a result, the cap 5 moves up the cap mounting hole 3 by the length of which the protrusions 5a and 5a are fitted in the lifting tool insertion hole 6.

  When the entire protrusions 5a, 5a ride on the base end surface of the boss 2d, the base end side of the cap 5 protrudes from the cap mounting hole 3 and the top surface of the concrete product K by the height of the protrusions 5a, 5a. The operator removes the cap 5 by pinching the protruding portion. The cap 5 can be easily removed with a simple tool in this way, and is not damaged due to long-term mounting or removal. Therefore, the cap 5 can be fully used in terms of function and appearance.

It is a disassembled perspective view which shows an example of embodiment of this invention. It is a side view which shows the insert main body in the form of implementation shown in FIG. FIG. 3 is a plan view of FIG. 2. FIG. 3 is a longitudinal section of FIG. 2. It is a top view which shows the cap in the form of implementation shown in FIG. Fig. 6 is a longitudinal section of Fig. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Insert, 2a ... Insert main body 2d ... Boss part, 2e ... Tip wall, 3 ... Cap mounting hole, 4 ... Suspension engagement hole, 5 ... Cap, 5a ... Projection, 6 ... Suspension tool insertion hole, 6a ... Concrete products such as long holes, 6b ... arc holes, 7 ... tool hanging grooves, K ... U-shaped grooves

Claims (2)

  A cap mounting hole is formed on the base end surface, and a groove-like lifting tool insertion hole is formed through the base wall from the base end wall to the top wall for inserting a lifting tool having a T-shaped tip continuously in the back. A lifting boss is formed at the tip of the top wall with a back hole portion that allows the locking projection formed at the tip of the lifting tool to rotate, and the top wall as a locking portion of the locking projection. An insert with a cap comprising an insert main body in which the cap mounting hole is embedded flush with a concrete product and a cap that is substantially flush with the cap mounting hole. The hooking groove is recessed and the outer periphery of the trunk portion is circular, and the radial cross section that fits into the insertion hole formed in the base end of the boss portion is rotatably mounted in the cap mounting hole. Triangular protrusion at the tip And when the cap is rotated in a state of being attached to the cap mounting hole, the projection rides on the proximal end wall of the boss portion, and the cap itself is at the proximal end of the boss portion of the projection. An insert that is pushed out of the cap mounting hole by the amount of fitting to the formed insertion hole. The insert with a cap according to claim 1, wherein the turning tool groove for recessing provided in the base end surface of the cap is for at least one of a driver and a coin.

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