Curing lid

Abstract

To provide a curing lid which can be applied to through-holes of as many sizes as possible and can be compactly packed when not in use.SOLUTION: The spring unit (2) includes a base (5) attached to a central portion of a back surface of the cover plate unit (1), and a plurality of spring members (6) each having one end held on the back surface of the base (5) and the other end extending in a direction obliquely away from the cover plate unit while spreading radially from the back surface of the base. Further, the curing lid is provided with a focusing ring member 9 for bundling the respective spring members 6, the focusing ring member 9 is formed so as to be movable in the far and near direction with respect to the rear surface of the lid plate unit 1, and when the focusing ring member 9 is moved to the lid plate unit side, the elastic force of the respective spring members 6 is released and spread in the radial direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a protective cover that temporarily covers through-holes provided in floors, walls, etc. for water supply and drainage facilities, air conditioning facilities, electrical wiring, etc. at construction sites of buildings, condominiums, etc. [Background technology]

[0002] In concrete buildings such as office buildings, through holes are provided in the floors, walls, beams, ceilings, and foundations (hereinafter collectively referred to as "walls, etc.") to allow various types of equipment piping, electrical wires, etc. to pass through. When forming a through hole in a floor, a cylindrical sleeve pipe C made of paper, vinyl chloride, etc., as shown in Figure 7 is first placed in the planned position where the through hole is to be formed, and then concrete is poured to form a through hole D in the floor B.

[0003] The through hole D formed in Floor B is a vertical hole that will eventually be backfilled with mortar or the like after the piping work etc. is completed, but because the vertical hole opening is open in Floor B during construction, water droplets and dust may fall, or materials or tools may be accidentally dropped, which could cause disasters or accidents for workers on lower floors, and there is also the risk that a worker could accidentally step in and get injured. For this reason, a protective cover (also known as a sleeve cap or hole cap) is used at construction sites to temporarily cover the opening of the through hole D that has been formed.

[0004] The diameters of various equipment pipes that are inserted into floors, walls, etc. vary depending on the scale and type of each equipment. Therefore, the through holes formed to insert the pipes are formed with a hole diameter that matches these diameters. Generally, through holes D of various sizes are formed in the range of 50 to 300 mm.

[0005] Therefore, there is a demand for a single curing cover that can be used for as many sizes of through-holes as possible. To address this, the applicant has previously proposed a curing cover equipped with a spring member that expands widely in the radial direction (see Patent Document 1).

[0006] This protective cover includes a cover plate for closing the opening of the through hole, and a spring unit that can be detachably attached to the cover plate. The spring unit has a spring member on the back surface of its base that extends radially and obliquely away from the cover plate. When the protective cover is attached to the through hole, the end portion of the spring member elastically contacts the inner peripheral surface of the through hole, allowing the attached position to be maintained. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2024-60855 Summary of the Invention [Problem to be solved by the invention]

[0008] In the above-mentioned protective cover, the spring members that spread out radially have a large elastic deformation range, so one protective cover can be used for through holes of many sizes. However, when not in use, the spring members are stored in a large, radially spread shape, so if multiple protective covers are stored together, the spring members may interfere with each other, causing tangles or damage.In addition, the radially spread spring members increase the volume, resulting in issues such as higher packaging and transportation costs.

[0009] Therefore, an object of the present invention is to provide a protective cover that can be applied to through-holes of as many sizes as possible and can be packed compactly when not in use. [Means for solving the problem]

[0010] In order to achieve the above object, the present invention employs the following technical means: The curing lid of the present invention comprises a cover plate unit for closing the opening of a through-hole formed in a wall or the like, and a spring unit detachably attached to the cover plate unit, the spring unit comprising a base attached to the center of the back surface of the cover plate unit, and a plurality of spring members each having one end held by the back surface of the base and the other end extending obliquely away from the cover plate unit while radially expanding from the back surface of the base, the plurality of spring members being configured to elastically deform in a bundling direction when an external force is applied, and further comprising a focusing ring member that surrounds and focuses the spring members from the outside against the elastic force, the focusing ring member being configured to be movable toward and away from the back surface of the cover plate unit, and when the focusing ring member is moved toward the cover plate unit, the elastic force of the spring members is released and they expand in the radial direction. [Effects of the Invention]

[0011] Since the protective cover of the present invention is configured as described above, when not in use, the focusing ring can be moved to compactly focus and hold the radially spread spring units. This makes it easy to carry and store, prevents damage to the spring members, and reduces packaging and shipping costs by reducing the volume.

[0012] In the above invention, the focusing ring member preferably has a restraining ring portion that bundles the spring members and a stopper ring portion that prevents them from coming loose, and a bent portion that abuts against the stopper ring portion when the spring members are focused is formed at the tip of the spring members. This allows the stopper ring portion to come into contact with the bent portion at the tip of the spring member when the focusing ring member is moved to focus the spring member with the restraining ring portion, preventing the focusing ring from coming off the spring member.

[0013] In the present invention, it is preferable that a connecting boss is provided in the center of the back surface of the cover plate unit, multiple engaging recesses or protrusions are formed on the back surface of the connecting boss, and multiple engaging protrusions or recesses that engage with the engaging recesses or protrusions are formed on the base surface of the spring unit, so that the cover plate unit and the spring unit can be attached and detached by engaging these engaging recesses and engaging protrusions. This allows the lid unit of a desired size to be easily attached to and detached from the spring unit with a single touch. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a front view of a protective cover according to an embodiment of the present invention. [Figure 2] A front view of the protective lid with the cover plate unit and spring unit separated. [Figure 3] A front view showing the state in which the elastic force of the spring unit of the protective lid is released. [Figure 4] FIG. 4 is a perspective view of the protective cover shown in FIG. 3. [Figure 5] FIG. [Figure 6] FIG. 10 is a bottom view of the spring unit excluding the bottom plate and focusing ring. [Figure 7] Cross-sectional view of a through hole to which a protective cover is attached. [Figure 8] 5 is a cross-sectional view taken along line XX in FIG. 4, illustrating a state of use. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The curing cover A according to the present invention comprises a disk-shaped cover plate unit 1 and a spring unit 2 detachably attached to the cover plate unit 1. The cover plate unit 1 is formed of a disk-shaped cover plate 3 and a cylindrical connecting boss 4 fixed to the center of the rear surface of the cover plate 3 by a screw 3a. The spring unit 2 is made up of a substantially cylindrical base 5 connected to the rear surface of the connecting boss 4 of the cover plate unit 1, and a spring member 6 supported by the base 5.

[0016] This protective cover A can be attached not only to through holes provided in the floor, but also to through holes provided in the side walls, ceiling, etc. Therefore, for example, if the attachment position is on the floor, the through hole is located below the cover plate unit 1, and if it is on the ceiling, the through hole is located above the cover plate unit 1, so the positional relationship between the cover plate unit 1 and the spring unit 2 is reversed depending on the attachment position.

[0017] In the following embodiment, a positional relationship will be described in which a protective cover A is attached to the open end of a through-hole D provided in a floor B as shown in FIG. The side facing the through hole D will be described as the back surface of the cover plate unit 1 (and the connecting boss 4), and the opposite surface will be described as the front surface of the cover plate unit 1. Similarly, the side of the base 5 of the spring unit 2 facing the through hole D will be described as the back surface of the base, and the opposite surface will be described as the front surface of the base.

[0018] One end of the spring member 6 of the spring unit 2 is held on the back surface of the base 5, and the other end extends radially from the back surface of the base 5 while bending obliquely away from the back surface of the cover plate unit 1 (downward of the through-hole D), with the other end contacting the inner circumferential surface of the through-hole D to function as a spring acting portion 6b. In this embodiment, three spring members 6 are provided on the back surface of the base at equal central angular positions (i.e., every 120 degrees). Furthermore, the tip portions of the spring members 6 are bent toward the axial direction of the cylindrical base 5 to form bent portions 6c.

[0019] In this embodiment, the spring member 6 is adapted to be able to elastically contact a wide range of through-holes D, at least with an inner diameter (inner peripheral surface) of 50 to 250 mm. Specifically, the spring action portion 6b is adapted to have a length that allows it to expand and elastically contact the maximum diameter (250 mm or more) of the through-hole D, and a double kick spring, which will be described below, is used.

[0020] As shown in FIG. 6, the double kick spring is composed of a coil portion 6a made of wound steel wire and a spring action portion 6b that extends outward from the coil portion 6a and has an arm shape. 1, the coil portion 6a at one end is fitted into a gap 7 formed on the back surface of the base 5 and is received and held by a bottom plate 8, so that the spring action portion 6b at the other end can undergo large elastic deformation with the coil portion 6a as the fulcrum (center). This allows the spring action portion 6b to elastically deform to a position nearly perpendicular to the back surface of the base 5, and the minimum diameter when the spring members 6 are bundled can be reduced to 50 mm or less.

[0021] Furthermore, a focusing ring member 9 is provided to bind the spring members 6 that spread out in three directions against their elastic forces. The focusing ring member 9 has a restraining ring portion 9a and a stopper ring portion 9b, is formed by winding a steel wire, and is configured to be movable toward and away from the rear surface of the cover plate unit 1 (up and down in FIG. 1). 1, the restraining ring portion 9a surrounds each spring member 6 from the outside, thereby bundling the spring members 6. At this time, the stopper ring 9b abuts against the bent portion 6c at the tip of the bundled spring members 6, preventing them from coming off the spring members. This focusing ring member 9 is formed so that when it is moved toward the cover plate unit 1 as shown in Figure 3, the elastic force of each spring member 6 is released and it spreads in the radial direction. The outer diameter of the base 5 is set in advance so that when the focusing ring member 9 is moved toward the cover plate unit 1, the restraining ring portion 9a fits into the outer peripheral surface of the base 4.

[0022] The cover plate unit 1 and the spring unit 2 are connected so as to be easily detachable by the following means.

[0023] A plurality of engaging recesses 10 (three at equal central angular positions in this embodiment) are formed on the back surface of the connecting boss 4 of the cover plate unit 1, and three engaging protrusions 11 that engage with the engaging recesses 10 are provided on the surface of the base 5 of the spring unit 2. Each engaging protrusion 11 is formed with a large-diameter head 11a and a small-diameter shaft 11b. The engaging recess 10 is gourd-shaped and opens toward the back surface, with a hole 10a into which the head 11a of the engaging protrusion can be inserted and an elongated hole 10b wide enough to allow the shaft 11b to move, leaving a space at the back. As a result, the cover plate unit 1 and the spring unit 2 can be connected with a single touch by inserting the head 11a of the engaging protrusion into the hole 10a of the engaging recess, rotating the cover plate unit 1, and moving the shaft 11a into the elongated hole 10b.

[0024] When the protective cover A configured as described above is not in use, the bundling ring 9 is moved downward to bundle the spring members 6 for storage, as shown in Figure 1. At this time, the stopper ring portion 9b abuts against the bent tip portion 6c of the spring members, preventing the bundling ring 9 from coming off the spring members. This allows the protective cover A to be bundled compactly, making it convenient for storage and transportation, and preventing damage to the spring members 6.

[0025] When using the protective cover A, as shown in Figure 3, the focusing ring 9 is moved upward to release the elastic force of each spring member 6, causing them to expand radially. Then, as shown in Figure 8, the spring member 6 is deflected by applying an external force from the outside, and the tip of the spring action portion 6b is inserted into the through-hole D, after which the external force is released. The spring action portion 6b comes into elastic contact with the inner circumferential surface of the through-hole D. By pushing the cover plate unit 1 in this state until it contacts the opening, the spring action portion 6b's biasing force allows the cover A to be attached while being centered on the axis of the through-hole D. This allows the protective cover A to be attached without misalignment or rattle. In addition, in areas where there is a risk of rainwater or other infiltration, it is preferable to completely seal the gap between the back surface of the cover plate 3 and the mounting surface of the sleeve pipe C (or wall B) by applying a caulking agent such as mortar.

[0026] Regarding the size of the cover plate 3 of the cover plate unit 1, if one size that fits the expected maximum diameter through hole D is prepared, it can be used for all through holes smaller in diameter. However, if a cover plate with the largest diameter is used at a construction site where multiple small diameter through holes are formed adjacent to each other, the cover plates will overlap. Therefore, it is desirable to prepare cover plate units 1 in multiple sizes standardized from small to large diameters and select the cover plate unit 1 to be used at each construction site. In such cases, with the curing cover A shown in the above embodiment, the cover plate unit 1 can be easily attached and detached from the spring unit 2, making it easy to replace the cover plate unit 1.

[0027] The above describes typical embodiments of the present invention, but the present invention is not necessarily limited to the above embodiments, and can be modified or changed as appropriate within the scope of the claims, while achieving its objectives.

[0028] For example, in the above embodiment, the engaging recess 10 is provided on the boss 4 of the cover plate unit 1, and the engaging protrusion 11 is provided on the base 5 of the spring unit 2, but the reverse may also be true. Also, instead of the connecting means using the engaging recess 10 and the engaging protrusion 11, a male screw and a female screw may be formed on the back surface of the boss 4 and the surface of the base 5, and they may be connected by a screwing means. Other connecting means are not particularly limited.

[0029] Furthermore, in the above embodiment, steel wire is used as the focusing ring 9 member and the spring member 6, but other materials may be used instead of steel wire as long as the object of the present invention can be achieved. [Industrial Applicability]

[0030] The present invention can be used as a protective cover that temporarily closes the open end of a through hole provided in a wall or the like to pass various types of pipes or electrical wires through. [Explanation of symbols]

[0031] A curing lid B wall C sleeve pipe D Through hole 1 Cover plate unit 2 spring units 3 Lid plate 4 Connecting boss 5. Bass 6 Spring member 6a Coil section 6b Spring action part 6c Bending part 9. Focusing ring member 9a Restraining ring part 9b Stopper ring part 10 Engagement recess 11 Engagement protrusion

Claims

1. The device comprises a cover plate unit for closing an opening of a through-hole provided in a wall or the like, and a spring unit detachably attached to the cover plate unit, The spring unit includes a base attached to the center of the rear surface of the cover plate unit, and a plurality of spring members each having one end held by the rear surface of the base and the other end extending radially from the rear surface of the base and obliquely away from the cover plate unit, the plurality of spring members are configured to be elastically deformed in a bundling direction when an external force is applied, The protective cover further includes a focusing ring member that surrounds and focuses each of the spring members from the outside against their elastic force, and the focusing ring member is formed so that it can move toward and away from the back surface of the cover plate unit, and when the focusing ring member is moved toward the cover plate unit, the elastic force of each spring member is released and they expand radially.

2. 2. The protective cover according to claim 1, wherein the bundling ring member includes a restraining ring portion that surrounds the spring members from the outside while they are bundled, and a stopper ring portion that prevents them from coming off, and a bent portion that abuts against the stopper ring portion when the spring members are bundled is formed at the tip of the spring members.

3. A protective lid as described in claim 1, wherein a connecting boss is provided in the center of the back surface of the cover plate unit, multiple engaging recesses or protrusions are formed on the back surface of the connecting boss, and multiple engaging protrusions or recesses are formed on the base surface of the spring unit that engage with the engaging recesses or protrusions, and the cover plate unit and the spring unit can be attached and detached by engaging these engaging recesses and engaging protrusions.

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