Insert cap
The elastic insert cap with a slanted opening and flange facilitates easy alignment and removal, addressing alignment and removal difficulties of previous caps, ensuring efficient sealing and clean finishes in construction.
Patent Information
- Application Number
- JP2024037083
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-11
- Publication Date
- 2025-09-25
AI Technical Summary
Existing caps with parallel ribs and slots on the inner surface of a cylindrical portion are difficult to align with threaded holes and hard to remove without a special jig, making them inefficient for sealing and removal during construction processes.
An elastic insert cap with a slanted opening, a circular rib on the inner wall, a flange on the outer periphery, and a slot allows easy alignment and insertion into threaded holes, and can be easily removed by grasping the flange or hooking onto the rib after concrete solidification.
The insert cap effectively seals threaded holes during concrete pouring and is easily removable, ensuring a clean finish by maintaining the outer shape and allowing easy removal post-construction.
Smart Images
Figure 2025138164000001_ABST
Abstract
Description
[Technical Field]
[0001] The present invention relates to an insert cap that reliably closes the opening of the insert to prevent the infiltration of mortar, and also allows the insert cap to be easily removed from the insert when the formwork is removed. [Background technology]
[0002] A cap is known that is made of resin and has a cylindrical portion with an outer flange formed at one end, and has a plurality of ribs on the inner wall of the cylindrical portion that are parallel to the axis of the cylindrical portion and has slots on the wall. As an example, the general catalog published by the applicant company is disclosed. [Prior art documents] [Non-patent literature]
[0003] [Non-Patent Document 1] Japan Life Co., Ltd. General Catalog, Vol. 3-2, Publication Date May 2020, Page 33 SK Jig "SK Jig Cap (Resin)" Summary of the Invention [Problem to be solved by the invention]
[0004] The disclosed cap has multiple ribs parallel to the axis on the inner surface of the cylindrical portion and slots in the wall, making it difficult to align when pushing it into the threaded hole of the insert. Furthermore, because the ribs are parallel to the axis, no pulling force is applied when removing the cap, making it difficult to do so without a special jig. The present invention aims to provide an insert cap that is highly aligned with the threaded hole of the insert and easy to remove. [Means for solving the problem]
[0005] (Claim 1) The insert cap of the present invention is made of an elastic material, and its cylindrical portion has an opening at one end on the axis and a slanted opening at the other end, and is characterized in that a ring-shaped rib is formed on the inner wall surface on the opening side, a flange is formed on the outer periphery of the opening, and a slot is provided toward the opening.
[0006] The cylindrical portion is elastic, but a circular rib is formed on the inner wall of the opening side, allowing it to maintain its outer shape at all times. When in use, pressing the cylindrical portion from the side also reduces the diameter, allowing it to be easily pushed into the insert's threaded hole through the oblique opening, and the flange can then seal the screw hole. In this state, the insert is fitted into the jig through the opening side of the insert cap, and concrete is poured into the formwork. Once solidified, the jig and the formwork are removed, and the insert cap can be easily removed by grasping the end of the insert cap's flange or inserting a finger through the opening, hooking it onto the rib, and pulling. The insert cap then reduces in diameter due to the slot, allowing it to be easily removed. This completes the product. A recess matching the outer shape of the jig appears in the product, and a mortar finish is then applied.
[0007] (Claim 2) The flange may be a flat plate. In this way, the opening of the screw hole in the insert is sealed by the flat plate, so that the sludge of the poured concrete and the like cannot penetrate into the screw hole.
[0008] (Claim 3) The slot does not have to reach the flat plate. This ensures that the flat plate has no grooves and that the surface of the recess is flat.
[0009] (Claim 4) The flange may be a cone-shaped body extending from the opening end side toward the cylindrical portion, and the end of the cone-shaped body in the oblique opening direction may be connected to the helical ridge. In this way, the threaded hole of the insert is sealed by the cone-shaped body, so that the sludge of the poured concrete does not penetrate into the threaded hole, and since the helical ridge of the insert cap is engaged with the threaded hole of the insert, it can be easily removed by unscrewing it.
[0010] (Claim 5) The slot may also include the cone-shaped body. This makes it easy to reduce the diameter of the cylindrical portion, including the cone-shaped body and the helical ridge portion, making it easy to insert the insert cap into the screw hole of the insert. [Effects of the Invention]
[0011] According to the present invention, the cylindrical portion is elastic, but the inner wall surface on the opening side has a circular rib formed, allowing it to maintain its outer shape at all times. When in use, pressing the cylindrical portion from the side also reduces the diameter of the slot, allowing the insert to be easily pushed into the threaded hole of the insert through the oblique opening, sealing the threaded hole with the flange on the outer periphery of the opening side. In this state, the insert is fitted into the jig through the opening side of the insert cap, and concrete is poured into the formwork. Once solidified, the jig and the formwork are removed, and the end of the insert cap's flange is grasped, or a finger is inserted through the opening to hook the rib and pull. The insert cap then reduces in diameter due to the slot, allowing it to be easily removed. The finished product is then obtained. A recess matching the outer shape of the jig appears in the product, and a mortar finish is then applied. [Brief explanation of the drawings]
[0012] [Figure 1] 1 is a front view showing a specific example of an insert cap C according to the present invention. [Figure 2] FIG. [Figure 3] The cross-sectional view taken along line A-A' in Figure 1 shows the insert cap C in use. [Figure 4a] FIG. 1 is a scaled front view of insert cap C. [Figure 4b] The side view of the insert 21 is partially half cross-sectional to show the screw hole 22. [Figure 4c] In the front view of the insert mounting jig J, the protrusion H protrudes along its axis and is set in the mold P with a nut N. [Figure 5a]This figure shows the state in which the insert cap C of Figure 4a is pushed into the threaded hole 22 of the insert 21 of Figure 4b, the opening 2 of this insert cap (see Figure 3) is fitted into the protrusion H of the insert mounting jig J of Figure 4c, and concrete K is poured into the formwork P. [Figure 5b] This is a diagram showing the state in which the poured concrete K has solidified to become the product Ka, and the insert mounting jig J has been removed together with the formwork P, exposing the recess G on the surface of the product Ka. [Figure 6] FIG. 10 is a front view showing an insert cap C' which is another embodiment of the present invention. [Figure 7] FIG. [Figure 8] FIG. 7 is a cross-sectional view taken along line BB' in FIG. [Figure 9a] FIG. 10 is a scaled front view of insert cap C'. [Figure 9b] The side view of the insert 21 is partially half cross-sectional to show the screw hole 22. [Figure 9c] In the front view of the insert mounting jig J, the protrusion H protrudes along its axis and is set in the mold P with a nut N. [Figure 10a] This figure shows the state in which the insert cap C' in Figure 9a is pushed into the threaded hole 22 of the insert 21 in Figure 9b, the opening 2 of this insert cap C' (see Figure 8) is fitted into the protrusion H of the insert mounting jig J in Figure 4c, and concrete K is poured into the formwork P. [Figure 10b] This is a diagram showing the state in which the poured concrete K has solidified to become the product Ka, and the insert mounting jig J has been removed together with the formwork P, exposing the recess G on the surface of the product Ka. [Example]
[0013] In the description of this embodiment, the same reference numerals indicate the same or corresponding parts. (Claim 1) In Figure 1, the insert cap of the present invention is made of an elastic material, and its cylindrical portion 1 has an opening 2 at one end on the axis x and a slanted opening 3 at the other end, and an annular rib 4 is formed on the inner wall surface 2a on the opening 2 side, a flange 5 is formed on the outer periphery of the opening 2, and a slot 6 is provided toward the opening 2.
[0014] Although the cylindrical portion 1 is elastic, a circular rib 4 is formed on the inner wall surface 2a on the opening 2 side, allowing it to maintain its outer shape at all times. When in use, pressing the cylindrical portion 1 from the side also causes the slot 6 to shrink in diameter, allowing the insert 21 to be easily pushed into the threaded hole 22 of the insert 21 through the oblique opening 2 and closed with the flange 5. In this state, the insert 21 is fitted into the jig J from the opening 2 side of the insert cap, and concrete K is poured into the formwork P. Once solidified, the jig J is removed along with the formwork P, and the end of the insert cap's flange 5 is grasped, or a finger is inserted through the opening 2 to hook onto the rib 4 and pull. The insert cap has a slot 6, which causes the insert to shrink in diameter and be easily removed. This results in the product Ka. A recess G matching the outer shape of the jig J appears in the product Ka, which can then be finished with mortar.
[0015] (Claim 2) This flange 5 is a flat plate 5a. In this case, the opening of the screw hole 22 of the insert 21 is sealed by the flat plate 5a, so that the sludge of the poured concrete does not enter the screw hole 22.
[0016] (Claim 3) The slot 6 does not reach this flat plate 5a. In this case, the flat plate 5a does not have the slot 6, and the flatness of the surface of the recess G can be ensured.
[0017] (Claim 4) This flange 5 is a cone-shaped body 5b extending from the opening 2 end toward the cylindrical portion 1, and the apex 5c of this cone-shaped body 5b in the oblique opening 3 direction continues to a helical ridge 5d. In this case, the threaded hole 22 of the insert 21 is sealed by the conical body 5b, so that the sludge of the poured concrete does not penetrate into the threaded hole 22, and since the helical ridge 5d of the insert cap is engaged with the threaded hole 22 of the insert 21, it can be easily removed by unscrewing it.
[0018] (Claim 5) The slot 6 also includes the cone-shaped body 5b. In this case, the diameter of the cylindrical portion 1, including the cone-shaped body 5b and the helical ridge 5d, can be easily reduced, making it easy to insert the insert cap into the screw hole of the insert. [Explanation of symbols]
[0019] C, C' insert cap x-axis 1 Cylinder part 2 aperture 2a Inner wall surface 21 Insert 22 screw holes 3 oblique mouth 4. Ribs 5 Tsuba 5a flat plate 5b cone 5c top 5d spiral protrusion 6 Slit J jig H protrusion N nut P-formwork K Concrete Ka Products G recess
Claims
1. An insert cap made of an elastic material, characterized in that the cylindrical portion (1) has an opening (2) at one end on the axis (x) and a slanted opening (3) at the other end, an annular rib (4) is formed on the inner wall surface (2a) on the opening (2) side, a flange (5) is formed on the outer periphery of the opening (2), and a slot (6) is provided from the slanted opening (3) side toward the opening (2).
2. 2. The insert cap according to claim 1, wherein the flange (5) is a flat plate (5a).
3. 3. An insert cap according to claim 2, wherein the slot (6) does not reach the flat plate (5a).
4. 2. An insert cap as described in claim 1, wherein the flange (5) is a cone-shaped body (5b) extending from the end of the opening (2) toward the cylindrical portion (1), and the apex (5c) of the cone-shaped body (5b) toward the oblique opening (3) continues to a spiral ridge (5d).
5. 5. An insert cap according to claim 4, wherein the slot (6) also includes the cone (5b).