Health preservation lid

Abstract

To prevent a curing lid from shifting from an opening of a round hole.SOLUTION: A curing lid 1 that closes an opening 41 of a round hole 4 includes: a lid portion 2 that closes the opening 41; and a plurality of leg portions 3 that are provided upright on the lid portion 2 and have strip-like portions that are inserted into the round hole 4. The leg portions 3 are arranged on the circumference of a predetermined virtual circle 221 located within an outer shape of the lid portion 2. A weak axis direction of the strip-like portion faces a direction different from a radial direction connecting a center 23 of the virtual circle 221 and an attachment position of the strip-like portion to the lid portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a protective cover. [Background technology]

[0002] Generally, a structure is known for a lid that closes an opening of a piping hole in a slab, which includes a lid body that is detachably attached to the opening, and a locking member that locks to the inside of the piping hole to attach the lid body (see, for example, Patent Document 1). The locking member is provided with an abutment that is pressed against the inner wall of the piping hole. When pressed, the abutment locks to the inner wall and is held inside the piping hole, preventing the lid from being pulled out upward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-160845 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the abutment portion of the locking member in Patent Document 1 is provided along the width direction of the plate-shaped locking member, and therefore, if a force is applied in a direction that causes the lid to shift from the opening of the piping hole and the locking member is deformed, there is a risk that the lid will shift from the opening.

[0005] The present invention has been made in consideration of the above points, and has an object to make it difficult for the lid to slip out of the opening when a force is applied in a direction in which the lid would slip out of the opening. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides a protective cover that covers the opening of a round hole, comprising a cover portion that covers the opening, and a plurality of legs that are erected on the cover portion and have band-shaped portions to be inserted into the round holes, wherein the legs are arranged on the circumference of a predetermined imaginary circle located within the outer shape of the cover portion, and the weak axis direction of the band-shaped portions faces in a direction different from the radial direction connecting the center of the imaginary circle and the attachment position of the band-shaped portions to the cover portion.

[0007] As a result, when a force is applied in a direction that causes the lid to shift from the opening, the leg receives a force in the strong axis direction from the side wall of the round hole, making the leg less likely to deform. Therefore, it is possible to make it difficult for the lid to shift from the opening. Effect of the Invention

[0008] In the present invention, the lid portion can be made less likely to slip out of the opening of the round hole. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is an oblique view of the protective cover of embodiment 1. [Diagram 2] FIG. 2 is a side view of the protective cover of embodiment 1. [Diagram 3] FIG. 2 is a bottom view of the protective cover of embodiment 1. [Figure 4] FIG. 2 is a side view showing the state in which the opening of the round hole is closed by the protective cover of embodiment 1. [Diagram 5] 1 is a perspective view showing a state in which the opening of a round hole is closed by the protective cover of embodiment 1. FIG. [Figure 6] FIG. 11 is an oblique view of a protective cover according to a second embodiment. [Figure 7] A side view showing the band-shaped portion of the protective cover of embodiment 2. [Figure 8] FIG. 11 is an oblique view of a protective cover according to embodiment 3. [Figure 9] FIG. 11 is a bottom view of the protective cover of embodiment 3. [Figure 10] FIG. 11 is an oblique view of a protective cover according to embodiment 4. [Figure 11]FIG. 11 is a bottom view of the protective cover of embodiment 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] First Embodiment Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its application or its uses.

[0011] In the following explanation, the up and down directions of the protective cover 1 will be defined using the arrows shown in FIG.

[0012] The curing cover 1 according to the first embodiment is used, for example, by being installed in a sleeve hole of a slab, to prevent a person from stepping through the sleeve hole or to prevent objects from falling into the sleeve hole. As shown in Figs. 1 to 3, the curing cover 1 includes a cover portion 2 and a plurality of (four in the first embodiment) legs 3 (strip portions) standing on the cover portion 2 as strip portions. The cover portion 2 is formed by processing a steel plate into a disk shape with a diameter d1. The upper surface of the cover portion 2 is referred to as a front surface 21, and the lower surface thereof is referred to as a back surface 22.

[0013] The leg 3 is formed by bending a single, generally rectangular (strip-shaped) steel plate. Therefore, the plate thickness direction of the leg 3 is the weak axis direction. The upper end of the leg 3 is provided with a mounting portion 31 that is attached to the lid 2, and the lower end is provided with a claw portion 32 that is bent inward. The vertical length of the leg 3 is set to about 100 mm.

[0014] The attachment portion 31 is, for example, spot-welded to the rear side surface 22 of the lid portion 2. This fixes the leg portion 3 to the lid portion 2. Since the leg portion 3 is fixed by spot welding in this manner, the leg portion 3 can be attached to the lid portion 2 at low cost.

[0015] As shown in Figures 1 to 3, the leg 3 is formed to extend downward from the mounting portion 31. The leg 3 is also provided so that the angle between it and the rear surface 22 of the lid 2 is angle θ1. In this way, the leg 3 is configured to extend in a direction away from the lid 2 and incline in the opposite direction to the center in the minor axis direction, that is, so that the tip is inclined in a direction spreading outwardly of the curing lid 1.

[0016] As shown in Figures 1 to 3, a claw portion 32 is provided at the lower part (tip) of the leg portion 3. The claw portion 32 is formed by bending the tip of the leg portion 3 in an L-shape toward the center of the protective lid 1. Also, as shown in Figure 3, a chamfered portion 321 is formed on the outer circumferential side of the lid portion 2 at the lower end side of the claw portion 32 (the front side of the paper in Figure 3).

[0017] 3, the legs 3 are arranged at equal intervals in the circumferential direction on the circumference of an imaginary circle 221 drawn by a two-dot chain line within the outer shape of the lid 2, with the center 23 being the central part of the back side surface 22 of the lid 2. Since the legs 3 are formed by bending a steel plate as described above, the plate thickness direction of the legs 3 is the weak axis direction. The weak axis direction of the legs 3 is inclined so that the angle between the center 23 of the imaginary circle 221 and the radial direction connecting the position of the mounting portion 31 of the legs 3 (for example, the center of the spot welding) is angle θ2 (for example, 120°).

[0018] 4 and 5 show a state in which the opening 41 of the round hole 4 having an inner diameter d2 is closed by the curing cover 1. When the opening 41 is closed by the curing cover 1 of the first embodiment, the leg 3 is inserted into the round hole 4. Before the leg 3 is inserted into the round hole 4, for example, the above-mentioned angle θ1 is adjusted to a predetermined angle so that the diameter d3 of the claw tip outermost circle 222 (shown by a two-dot chain line in FIG. 3) connecting the outermost parts at the tip of each claw 32 is smaller than the inner diameter d2 of the round hole 4, and the diameter d4 of the leg outermost circle 223 connecting the outermost parts of the leg 3 is larger than the inner diameter d2 of the round hole 4. Alternatively, the leg 3 may be bent within a range in which it can be elastically deformed so that the diameter d3 of the claw tip outermost circle 222 connecting the outermost parts at the tip of each claw 32 is smaller than the inner diameter d2 of the round hole 4. In this state, the claw portion 32 is pressed against the edge of the opening 41 of the round hole 4, and the protective cover 1 is pushed into the round hole 4 from the surface side of the cover portion 2. As a result, the claw portion 32 is guided to the edge of the opening 41 of the round hole 4, and the leg portion 3 is inserted into the round hole 4. The inserted leg portion 3 comes into contact with the side wall of the round hole 4. The leg portion 3 in contact with the side wall in this manner prevents the cover portion 2 closing the opening 41 from shifting horizontally from the opening 41. Also, since the length of the leg portion 3 is, for example, about 100 mm as described above, the leg portion 3 is prevented from slipping out of the round hole 4 upward.

[0019] As described above, the legs 3 are attached to the lid 2 such that the weak axis direction is inclined with respect to the radial direction connecting the center of the imaginary circle 221 and the attachment position of the legs to the lid, and therefore the plate surface of the legs 3 is in contact with the side wall of the round hole 4 at an angle, as shown in Figs. 4 and 5. As a result, a force is applied to the lid 2 from the outside in a direction (e.g., left and right direction) that causes the lid 2 to move in a direction that displaces the lid 2 from the opening 41, and when the legs 3 are pressed against the side wall of the round hole 4, a force in the strong axis direction is applied to the legs 3 from the side wall of the round hole 4. Therefore, deformation of the legs 3 due to the movement of the lid 2 can be suppressed or the deformation can be kept small, and the lid 2 can be prevented from displacing from the opening 41 of the round hole 4.

[0020] Furthermore, the legs 3 extend in a direction away from the lid 2 and are inclined in the opposite direction to the center of the lid 2 in the minor axis direction. This inclination sets the angle θ1 described above. By arbitrarily setting the magnitude of this angle θ1, it is possible to adjust the diameter d3 of the claw tip outermost circumference circle 222 connecting the outermost parts of each claw 32. Therefore, by changing the size of the diameter d3 to match the inner diameter d2 of the opening 41 of the round hole 4, the protective cover 1 can be used for a variety of round holes 4.

[0021] Furthermore, on the side of the leg 3 opposite the lid 2, a claw 32 is formed that is bent toward the center in the minor axis direction, and a chamfered portion 321 is formed on the outer circumferential side of the lid 2. As a result, the diameter d3 of the claw tip outermost periphery circle 222 that connects the radially outermost parts of the claws 32 of each leg 3 is smaller than that without the chamfered portion 321, making it easier to insert the claw 32 into the round hole 4.

[0022] Second Embodiment 6 and 7, the second embodiment is a partial modification of the first embodiment. In the following, only the parts different from the first embodiment will be described in detail, and the detailed description of the same configuration as the first embodiment will be omitted.

[0023] -Different configuration from embodiment 1- In the second embodiment, as shown in Figs. 6 and 7, the leg 3 has a first band-shaped portion 30 and a second band-shaped portion 33 (band-shaped portion). The first band-shaped portion has a similar configuration to the leg 3 of the first embodiment, and has an attachment portion 31 and a claw portion 32 at the upper and lower ends. However, the first band-shaped portion 30 has a plate thickness direction (weak axis direction) that is a radial direction connecting the center 23 of the virtual circle 221 and the position of the attachment portion 31 of the leg 3. On the other hand, the second band-shaped portion 33 has a weak axis direction that is different from the radial direction connecting the center 23 of the virtual circle 221 and the position of the attachment portion 31 of the leg 3, and the radial direction is a strong axis direction. In this way, by having the second band-shaped portion 33 having a weak axis direction different from the weak axis direction of the first band-shaped portion 30, it is possible to suppress or suppress the deformation of the leg 3 due to the movement of the lid portion 2, and it is possible to prevent the lid portion 2 from being displaced from the opening 41 of the round hole 4.

[0024] Here, as shown in Fig. 7, the second belt-shaped portion 33 is inclined so that the angle between its upper end and the lid portion 2 is angle θ4, although this is not essential. Providing the angle θ4 makes it possible to prevent contact between the second belt-shaped portion 33 and the lid portion 2 when the diameter d3 is made smaller than the inner diameter d2 before the leg portion 3 is inserted into the round hole 4 as in the first embodiment. That is, while allowing deformation of the leg portion 3 following the inner diameter of the round hole 4 and deformation of the leg portion 3 according to the displacement of the lid portion 2 until the second belt-shaped portion 33 abuts against the lid portion 2, it is possible to strongly resist deformation beyond the abutment of the second belt-shaped portion 33 against the lid portion 2.

[0025] When the opening 41 is closed by the curing cover 1 of the second embodiment, the leg 3 is inserted into the round hole 4 in the same manner as in the first embodiment. Unlike the first embodiment, the plate surface of the leg 3 inserted into the round hole 4 contacts the side wall of the round hole 4 parallel to the side wall of the round hole 4. Meanwhile, the reinforcing part 33 is inclined with respect to the side wall of the round hole 4. As a result, a force is applied to the cover 2 from the outside in a direction in which the cover 2 is displaced from the opening 41, and when the leg 3 is pressed against the side wall of the round hole 4, a force in the strong axis direction is applied to the reinforcing part 33 of the band-shaped part 30 from the side wall of the round hole 4. Therefore, the deformation of the band-shaped part 30 due to the movement of the cover 2 can be suppressed or the deformation can be suppressed to a small extent, and the cover 2 can be prevented from being displaced from the opening 41 of the round hole 4.

[0026] Third Embodiment As shown in Figures 8 and 9, the third embodiment is a partial modification of the first embodiment. In the following, only the parts that differ from the first embodiment will be described in detail, and the detailed description of the same configuration as the first embodiment will be omitted.

[0027] -Different configuration from embodiment 1- In the third embodiment, as shown in Fig. 6 and Fig. 7, the leg 3 (strip) as a strip is formed by cutting and raising the cover 2 downward in a strip shape. This makes it possible to reduce the cost of forming the leg 3. In the first embodiment, the mounting part 31 of the leg 3 is the mounting position. On the other hand, in the third embodiment, the innermost bending fulcrum 34 when cutting and raising the leg 3 is disposed on the imaginary circle 221 as the mounting position. In the third embodiment, a notch 35 is formed at the lower end of the leg 3.

[0028] When closing the opening 41 with the protective cover 1 of the third embodiment, the leg 3 is inserted into the round hole 4 in the same manner as in the first embodiment. Since the cutout 35 is provided in the outer portion of the lower end of the leg 3, the diameter d5 of the leg tip outermost circumference circle 224 (shown by a two-dot chain line in FIG. 9) connecting the outermost portions of the lower end of the leg 3 is reduced. This makes it easier to insert the leg 3 into the round hole 4 compared to when there is no cutout 35.

[0029] When the opening 41 is closed by the curing cover 1 of the third embodiment, the leg 3 is inserted into the round hole 4 as in the first embodiment. In the third embodiment, the leg 3 is cut and raised so that the weak axis direction is inclined with respect to the radial direction connecting the center of the virtual circle 221 and the innermost bending support 34, so that the plate surface of the leg 3 is inclined and in contact with the side wall of the round hole 4 as in the first embodiment. As a result, a force is applied to the cover 2 from the outside in a direction in which the cover 2 moves away from the opening 41, and when the leg 3 is pressed against the side wall of the round hole 4, a force in the strong axis direction is applied to the leg 3 from the side wall of the round hole 4. Therefore, the deformation of the leg 3 due to the movement of the cover 2 can be suppressed or the deformation can be suppressed to a small extent, and the cover 2 can be prevented from being displaced from the opening 41 of the round hole 4.

[0030] Fourth Embodiment 10 and 11, the fourth embodiment is a partial modification of the second embodiment. In the following, only the parts different from the second embodiment will be described in detail, and the detailed description of the same configuration as the first embodiment will be omitted.

[0031] -Different configuration from embodiment 2- In the fourth embodiment, as shown in Figs. 10 and 11, a first band-shaped portion 37 and a second band-shaped portion 36 (band-shaped portion) are provided separately. The second band-shaped portion 36 is formed from a single band-shaped steel plate. A lid portion 2 is provided on the upper portion of the second band-shaped portion 36, and an innermost end portion 361 of the second band-shaped portion 36 is disposed on the imaginary circle 221 as an attachment position. The weak axis direction of the second band-shaped portion 36 is provided so as to face in a direction different from the radial direction connecting the center 23 of the imaginary circle 221 and the innermost end portion 361 of the second band-shaped portion 36. A notch portion 362 is provided in the outer portion of the lower end portion of the second band-shaped portion 36. On the other hand, the first band-shaped portion 37 has the same shape as the first band-shaped portion 30 of the second embodiment.

[0032] When the opening 41 is closed with the protective cover 1 of the fourth embodiment, the second belt-like portion 36 and the first belt-like portion 37 are inserted into the round hole 4. The first belt-like portion 37 is inserted while being bent within the range of elastic deformation, similar to the first belt-like portion 30 of the second embodiment. At this time, the notch 362 provided in the second belt-like portion 36 is guided by the edge of the opening 41 of the round hole 4, and the second belt-like portion 36 is inserted into the round hole 4. A gap is left between the inserted second belt-like portion 36 and the side wall of the round hole 4.

[0033] As in the second embodiment, the plate surface of the first strip portion 37 inserted into the round hole 4 contacts the side wall of the round hole 4 in parallel. On the other hand, the second strip portion 36 faces in a different direction from the side wall of the round hole 4. As a result, a force is applied from the outside to the lid portion 2 to move the lid portion 2 in a direction that displaces the lid portion 2 from the opening 41, and when the lid portion 2 moves to a certain extent and the second strip portion 36 is pressed against the side wall of the round hole 4, a force in the strong axis direction is applied to the second strip portion 36 from the side wall of the round hole 4. Then, it is possible to suppress the application of a force in the weak axis direction from the side wall of the round hole 4 to the first strip portion 37. Therefore, it is possible to suppress the deformation of the second strip portion 36 and the first strip portion 37 due to the movement of the lid portion 2, or to suppress the deformation to a small extent, and it is possible to prevent the lid portion 2 from displacing from the opening 41 of the round hole 4.

[0034] Furthermore, in the fourth embodiment, the first band-like portion 37, which is bent within an elastically deformable range when inserted into the round hole 4, and the second band-like portion 36, to which a force in the strong axis direction is applied from the side wall of the round hole 4 after insertion into the round hole 4, are configured separately. This makes it easier to bend the first band-like portion 37, making it easier to insert the first band-like portion 37 into the round hole 4. This makes it possible to suppress deformation of the second band-like portion 36 and the first band-like portion 37 due to movement of the lid portion 2, or to keep the deformation small, thereby making it possible to both prevent the lid portion 2 from shifting from the opening 41 of the round hole 4 and make it easier to insert the second band-like portion 36 and the first band-like portion 37 into the round hole 4.

[0035] (Other embodiments) As described above, the embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to these, and may be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made as appropriate.

[0036] In the above embodiment, four legs 3 are provided, but this is not limiting. Three, five or more legs 3 may be provided in accordance with the diameter of the lid 2. For example, when the diameter d1 of the lid 2 is 200 mm or less, three legs 3 may be provided, when the diameter d1 is 200 mm to 300 mm, four legs 3 may be provided, when the diameter d1 is 300 mm to 400 mm, five legs 3 may be provided, and when the diameter d1 is 400 mm or more, six legs 3 may be provided. [Explanation of symbols]

[0037] 1 Curing lid 2 Lid 23 center 221 Virtual Circle 222 Claw tip outermost circle 223 Outermost leg circle 3 legs 321 Chamfered part

Claims

1. A protective cover for closing a round hole opening, A lid portion that closes the opening; a plurality of legs provided on the lid portion and having a band-shaped portion to be inserted into the round hole; The legs are disposed on the circumference of a predetermined imaginary circle located within the outer shape of the lid, A protective lid characterized in that the weak axis direction of the band-shaped portion is inclined with respect to a radial direction connecting the center of the virtual circle and the attachment position of the band-shaped portion to the lid portion, and the tip portion is inclined in a direction expanding outwardly of the protective lid.

2. In the protective cover described in claim 1, At the tip of the belt-shaped portion, a claw portion is formed which is bent toward the inside of the protective cover, A protective lid characterized in that a chamfer is formed on the outer circumferential side of the lid portion at the tip of the claw portion.

3. A protective cover for closing a round hole opening, A lid portion that closes the opening; a plurality of legs provided on the lid portion and having a band-shaped portion to be inserted into the round hole; The legs are disposed on the circumference of a predetermined imaginary circle located within the outer shape of the lid, The protective lid is characterized in that the band portion includes a first band portion whose weak axis direction faces in the same direction as the radial direction connecting the center of the virtual circle and the attachment position of the band portion to the lid portion, and a second band portion whose weak axis direction faces in a different direction.

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