JP2005069376A - Decorative cover for through hole of structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To install a decorative cover for a through hole of a structure in the condition wherein a fall-stop function is surely shown to several kinds of sleeves having a different inner diameter by enlarging a range of elastic deformation with rational remodeling of a lock piece. <P>SOLUTION: A first lock piece 5 formed by projecting outward than the inner peripheral surface 3a of the sleeve 3 at a plurality of positions in the circumferential direction of an annular cover main body 4 for covering an opening end surface side of the through hole forming sleeve 3 embedded in the structure and to be elastically deformed inward in the radial direction with insertion thereof into the sleeve 3 is extended in the cantilever condition along the axial direction X of the through hole 2. The first lock piece 5 is provided with a second lock piece 6 projecting outward than the maximum outside radius part 5b in the cantilever condition elastically deformable inward in the radial direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention provides an annular covering the opening end face side of a sleeve embedded in a through-hole formation planned location in order to form a through-hole in a wiring, a piping planned location or a ventilation port formation planned location of a structure such as a concrete wall. About cosmetic cover.

  In a conventional decorative cover for a through-hole of a structure, a cylindrical body that can be inserted into a sleeve is integrally formed on an annular cover body that covers the opening end face side of the sleeve, and at a plurality of circumferential positions of the cylindrical body. The locking piece projecting outward from the inner peripheral surface of the sleeve is formed to be ejected radially outward in a cantilever state that can be elastically deformed radially inward as the sleeve is inserted ( For example, see Patent Documents 1 to 3).

JP-A-9-296943 Registered Utility Model No. 3049321 Registered Utility Model No. 3077734

  In the conventional decorative cover for through-holes, a cylindrical body that can be inserted into the sleeve is integrally formed on an annular cover body that covers the open end face side of the sleeve, resulting in an increase in weight and an increase in manufacturing cost. The tip of the locking piece is applied to the inner peripheral surface of the sleeve by using the elastic restoring force of the locking piece that is formed by cantilevering at multiple locations in the circumferential direction of the cylindrical body. However, since the elastic deformation range of the locking piece itself is narrow, when the outer radius at the tip of the locking piece is extremely smaller than the inner diameter of the sleeve, the locking piece is elastically deformed as it is inserted into the sleeve. As a result, when such plastic deformation (sagging) of the locking piece occurs, there is a problem in that the function of preventing the locking piece from falling off is extremely lowered.

  Therefore, for example, in the case of rigid vinyl chloride pipes used as sleeves, the pipe types are divided into three types: VP, VU, and SU, but since the average diameter tolerance of their inner diameters is large, they are suitable for each pipe type. It is necessary to prepare a plurality of types of decorative covers formed on the locking pieces, and the workability is deteriorated and the manufacturing cost is likely to increase.

  The present invention has been made in view of the above-described actual situation, and its main problem is to expand the elastic deformation range by rational modification of the locking piece, and to a plurality of types of sleeves having different inner diameters. Another object of the present invention is to provide a useful through-hole decorative cover that can be mounted in a state where a reliable retaining function can be exhibited.

  According to a first aspect of the present invention, there is provided a decorative cover for a through-hole of a structure according to a first aspect of the present invention. The first locking piece that protrudes outward from the inner peripheral surface of the sleeve and elastically deforms radially inward as it is inserted into the sleeve extends in a cantilever state along the axial direction of the through-hole. And at least a portion of the first locking piece is in a cantilever state in which a second locking piece protruding outward from the maximum outer radius portion thereof is elastically deformable radially inward. It is in the point provided.

  According to the above characteristic configuration, the first locking pieces formed at a plurality of locations in the circumferential direction of the cover main body are inserted radially into the inner side with the mounting base side with respect to the cover main body as a substantial fulcrum with the insertion into the sleeve. Simultaneously with elastic deformation, the second locking piece provided on at least a part of the first locking piece is elastically deformed radially inward with the mounting base side with respect to the first locking piece as a substantially fulcrum. The tip of the second locking piece is pressed against the inner peripheral surface of the sleeve by the elastic restoring force.

  Therefore, at least a portion of the first locking piece that can be elastically deformed radially inward with respect to the cover main body is provided with the first locking piece that can be elastically deformed radially inward with respect to the first locking piece. Since the overall elastic deformation range can be greatly expanded, it can be mounted with a single type of decorative cover in a state where a reliable retaining function can be exerted on multiple types of sleeves with different inner diameters. It is possible to improve workability and reduce manufacturing costs.

  According to a second aspect of the present invention, there is provided a decorative cover for a through-hole of a structure according to a second aspect of the present invention. A first locking piece that is formed in an arc shape or a polygonal shape having a maximum outer radius larger than the inner radius and elastically deforms radially inward as it is inserted into the sleeve is in the axial direction of the through hole. Is extended in a cantilevered manner, and at least a part of the first locking pieces has a second locking piece protruding outward from the maximum outer radius portion thereof in a radially inward direction. It exists in the point provided in the cantilever state which can be elastically deformed.

  According to the above characteristic configuration, the first locking pieces formed at a plurality of locations in the circumferential direction of the cover main body are inserted radially into the inner side with the mounting base side with respect to the cover main body as a substantial fulcrum with the insertion into the sleeve. Simultaneously with elastic deformation, the second locking piece provided on at least a part of the first locking piece is elastically deformed radially inward with the mounting base side with respect to the first locking piece as a substantially fulcrum. The tip of the second locking piece or the top of the first locking piece and the top of the first locking piece are pressed against the inner peripheral surface of the sleeve by the elastic restoring force.

  In addition, since the first locking piece is formed in an arc shape or a polygonal shape having a maximum outer radius larger than the inner radius of the sleeve, the first engaging piece can be smoothly inserted into the sleeve, and the first Appropriate rigidity for shape retention can be imparted to the stopper piece.

  Therefore, at least a part of the arc-shaped or polygonal first locking piece that can be elastically deformed radially inward with respect to the cover main body, and the first locking piece that can be elastically deformed radially inward with respect to this As a whole, the elastic deformation range as a whole can be greatly expanded, so it is easy to use a single type of decorative cover in a state where a reliable retaining function can be achieved even for multiple types of sleeves with different inner diameters. It is possible to improve the workability and reduce the manufacturing cost.

  According to a third aspect of the present invention, there is provided a decorative cover for a through-hole of a structure, wherein the second locking piece extends in a cantilevered state toward the cover main body starting from the tip side of the first locking piece. It is in the point that has been put out.

  According to the above characteristic configuration, when inserting into the sleeve, the outer surface of the inclined posture of the second locking piece acts as a guide surface when elastically deforming both locking pieces radially inward. Can be facilitated. Nevertheless, when an external force in the pulling direction is applied, the tip of the second locking piece is easily engaged with the inner peripheral surface of the sleeve, and the retaining function can be enhanced.

  According to a fourth aspect of the present invention, there is provided a decorative cover for a through-hole of a structure in a state in which the second locking piece is deviated to the tip side from the top portion that is the maximum outer radius of the first locking piece. It is in the point provided.

  According to the above characteristic configuration, the first locking pieces formed at a plurality of locations in the circumferential direction of the cover main body are inserted radially into the inner side with the mounting base side with respect to the cover main body as a substantial fulcrum with the insertion into the sleeve. When elastically deformed, the inclined posture of the second locking piece provided on the first locking piece changes to the upright side, so that the tip of the second locking piece is easily engaged with the inner peripheral surface of the sleeve, and the retaining is prevented. Function can be enhanced.

  The characteristic structure of the decorative cover for through-holes of a structure according to claim 5 of the present invention is that the cover body, the first locking piece, and the second locking piece are integrally formed.

  According to the above characteristic configuration, the structure can be simplified and the manufacturing cost can be reduced as compared with the case where the cover main body, the first locking piece, and the second locking piece are separately manufactured.

  According to a sixth aspect of the present invention, the decorative cover for the through hole of the structure is characterized in that a tip edge of the first locking piece is formed in a semicircular arc shape or a semipolygonal shape.

  According to the above characteristic configuration, when the protrusion margin toward the through-hole axial center side at the tip of the first locking piece that is elastically deformed radially inward as it is inserted into the sleeve, Since it is the largest and becomes smaller on both outer sides in the width direction, the catching cost for the pipe and wiring to be inserted is reduced, and the piping / wiring insertion work can be easily performed.

  The characteristic structure of the decorative cover for through-holes of a structure according to claim 7 of the present invention is that a hole is formed in the arc-shaped or polygonal portion of the first locking piece.

  According to the above characteristic configuration, by forming a punched hole in the arc-shaped or polygonal portion of the first locking piece, the first locking piece is imparted with rigidity for shape retention and smoothly inward in the radial direction. Can be elastically deformed.

  A feature of the decorative cover for through-holes of a structure according to claim 8 of the present invention resides in that the second locking piece is formed by being punched out in a state of being continuous with the hole of the first locking piece.

  According to the above-described characteristic configuration, the punching hole formed by the punching process of the second locking piece can be combined with the punching hole for smoothly elastically deforming the first locking piece radially inward. .

[First Embodiment]
1 to 9 are through-holes formed in a planned insertion place (or a ventilation hole formation planned location) such as an air-conditioning pipe P or wiring in the wall 1 of a concrete structure A which is an example of a fireproof structure. 1 shows a fireproof decorative cover B attached to the opening end of the hole 2, and of the opening end face of the synthetic resin sleeve 3 for forming the through hole 2 embedded in the wall 1, the opening end face mainly on the outdoor side Are formed in an arc shape with a maximum outer radius portion 5b larger than the inner radius (inner circumferential surface) of the sleeve 3 at a plurality of circumferential positions (three in the present embodiment) of the annular cover body 4 covering the sleeve. And the 1st locking piece 5 which elastically deforms radially inward with insertion in the sleeve 3 is extended in the cantilever state along the axis line (axial center) X direction of the through-hole 2. And all the first locking pieces 5 have a diameter larger than the maximum outer radius portion (top portion) 5b thereof. A second locking piece 6 projecting outward is provided along the axis (axis) X direction of the through-hole 2 in a cantilever state elastically deformable radially inward. The first locking piece 5 and the second locking piece 6 are integrally formed by sheet metal processing using a metal material such as stainless steel.

  The cover body 4 is formed in an annular shape when viewed in the direction of the axis X of the through hole 2, and a cylindrical contact portion 4 a that abuts the outer surface of the wall 1 from the direction of the axis X of the through hole 2 is folded at the outer peripheral edge. The sleeve 3 is bent and has an inner peripheral edge positioned on a plane passing through the tip of the cylindrical contact portion 4 a, or the cylindrical contact portion 4 a is in contact with the outer surface of the wall 1. The inner cylinder part 4b which enters a little inside is bent.

  Further, as shown in FIGS. 1 to 3, the cover main body 4 is detachably mounted with a metal lid 7 made of stainless steel or the like and having a size covering the opening of the cover body 4. An annular recess 4c is formed in a recess, and a screw hole 4d for removably fixing the lid body 7 with a screw 10 is formed at a location in the circumferential direction of the annular recess 4c.

  When the lid body 7 is screwed to the annular recess 4 c of the cover body 4, an annular packing 9 is provided between the annular recess 4 c of the cover body 4 and the lid body 7 as shown in FIG. 1. By interposing it, rainwater or the like is prevented from entering the sleeve 3.

  The first locking piece 5 is continuously formed at the end edge of the inner cylindrical portion 4b of the cover body 4, and the tip edge 5a is formed in a semicircular arc shape. At the center in the width direction, in a cantilever state starting from the tip edge 5a side thereof toward the cover body 4 side, the tip edge 5a side of the maximum outer radius portion (top portion) 5b of the first locking piece 5 The second locking piece 6 having a rectangular shape is formed so as to be radiated outward in the radial direction.

  When inserted into the sleeve 3, the outer surface of the distal end side of the arc-shaped portion of the first locking piece 5 and the outer surface of the inclined position of the second locking piece 6 bring both the locking pieces 5, 6 inward in the radial direction. Since it acts as a guide surface for elastic deformation, the insertion operation can be facilitated. Nevertheless, when an external force in the pulling direction is applied, the tip 6a of the second locking piece 6 can be easily engaged with the inner peripheral surface of the sleeve 3, and the retaining function can be enhanced.

  Further, as the sleeve 3 is inserted, the first locking pieces 5 integrally formed at a plurality of locations in the circumferential direction of the cover body 4 are radially inward with the mounting base side with respect to the cover body 4 as a substantially fulcrum. When elastically deformed, the inclined posture of the second locking piece 6 formed by stamping on the first locking piece 5 changes to the upright side (the side perpendicular to the axis X of the through hole 2). The tip 6a of the piece 6 can be more easily engaged with the inner peripheral surface 3a of the sleeve 3, and the retaining function can be further enhanced.

  A punching hole formed by punching the second locking piece 6 is formed in a long hole shape penetratingly formed along the axis X direction of the through hole 2 at the center in the width direction of the arc-shaped portion of the first locking piece 5. Alternatively, it is continuously formed in the slit-shaped punching hole 8 so that the punching hole of the second locking piece 6 is elastically smoothly inward in the radial direction while giving the first locking piece 5 rigidity for shape retention. A part of the hole 8 for deformation is also used.

In the decorative cover for through-holes of the fireproof structure shown in FIG. 9, the types of hard vinyl chloride pipes used as the sleeve 3 are divided into three types: VP, VU, and SU.
When the tube size is 75, the VP tube shown in (a) has a standard outer diameter of 89.0 mm, a standard wall thickness of 5.5 mm, and an inner diameter calculated from them is 83.5 mm.
In the VU pipe shown in (b), the standard outer diameter is 89.0 mm, the standard thickness is 2.7 mm, and the inner diameter calculated from them is 86.3 mm.
In the SU pipe shown in (c), the standard outer diameter is 80.0 mm, the standard wall thickness is 2.5 mm, and the inner diameter calculated from them is 77.5 mm.

  The outer diameter D1 of the inner cylindrical portion 4b of the cover body 4 is 74.5 mm as a reference diameter, the outer diameter D2 at the maximum half outer diameter portion 5b of the first locking piece 5 is 84.2 mm, and the second locking piece 6 The outer diameter D3 at the tip 6a is formed to 87.4 mm.

  Then, with the insertion into the sleeve 3, the first locking pieces 5 formed at a plurality of locations in the circumferential direction of the cover main body 4 are elastic inward in the radial direction with the mounting base side with respect to the cover main body 4 as a substantially fulcrum. At the same time as the deformation, the second locking piece 6 that is formed on the first locking piece 5 is elastically deformed radially inward with the mounting base side with respect to the first locking piece 5 as a substantially fulcrum. , 6 is pressed against the inner peripheral surface 3a of the sleeve 3 by the elastic restoring force of the second locking piece 6, so that the three kinds of hard vinyl chloride pipes used as the sleeve 3 with one type of decorative cover B are provided. It can be attached to the tube type in a state where a reliable retaining function can be exhibited.

  As shown in FIG. 2, in the case where a heat-expandable heat-resistant resin (heat-expandable heat-resistant putty) 11 is loaded between the inner peripheral surface 3a of the sleeve 3 and the piping P or wiring inserted therethrough, The heat-expandable heat-resistant resin 11 expands with the occurrence of a fire and closes the space between the inner peripheral surface 3a of the sleeve 3 and the softened pipe P or wiring. Even in this case, the first locking piece 5 and the end 6a of the second locking piece 6 bite into the inner peripheral surface 3a of the sleeve 3 due to the elastic restoring force of the second locking piece 6, and thus the decorative cover is moved out by the thermal expansion of the heat-expandable heat-resistant resin 11. Therefore, the hole closing function by the heat-expandable heat-resistant resin 11 can be surely exhibited.

[Second Embodiment]
In the first embodiment described above, the first locking piece 5 is curved in an arc shape having a maximum outer radius larger than the inner radius of the sleeve 3, but as shown in FIG. The stop piece 5 may be bent and formed into a polygonal shape having a maximum outer radius larger than the inner radius of the sleeve 3.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Third Embodiment]
In the first embodiment described above, the first locking piece 5 is curved in an arc shape having a maximum outer radius larger than the inner radius of the sleeve 3, but as shown in FIG. The stop piece 5 is formed in a bent shape having a maximum outer radius larger than the inner radius of the sleeve 3, and the leading end side of the first locking piece 5 starts from the front end side thereof. The second locking piece 6 is moved radially outward in a cantilevered state toward the cover body 4 and in a state displaced to the tip side from the top portion P that is the maximum outer radius of the first locking piece 5. It may be formed by punching.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In each of the above-described embodiments, all of the first locking pieces 5 formed at a plurality of locations in the circumferential direction of the cover body 4 protrude outward from the maximum outer diameter portion of the first locking pieces 5. The second locking piece 6 to be punched is formed in a cantilever state that can be elastically deformed radially inward. However, the second locking piece 6 may be stamped and formed only on a part of the first locking pieces 5. .

  (2) In each of the above-described embodiments, the second locking piece 6 protruding outward from the maximum outer diameter portion of the first locking piece 5 is formed by stamping from the first locking piece 5. The stop piece 6 and the first locking piece 5 may be manufactured separately, and the second locking piece 6 may be fixed to the first locking piece 5 by spot welding or screws.

  (3) In each of the above-described embodiments, the cover body 4 and the first locking piece 5 are integrally formed. However, both of these 4 and 5 are manufactured separately, and the first locking piece 5 is attached to the cover body 4. It may be fixed by spot welding or screws.

  (4) In each of the above-described embodiments, the second locking piece 6 extends in a cantilevered state toward the cover body 4 from the distal end side of the first locking piece 5. The locking piece 6 may extend in a cantilevered state from the base end side of the first locking piece 5 toward the distal end side thereof.

  (5) In each of the above-described embodiments, the second locking piece 6 is provided in a state of being deviated toward the tip side from the maximum outer radius portion 5b of the first locking piece 5, but this second locking piece The piece 6 may be provided in a state of being deviated in the vicinity of the maximum outer radius portion 5b of the first locking piece 5 or the proximal end side thereof.

Sectional side view at the time of lid mounting | wearing which shows 1st Embodiment of this invention Cross-sectional side view when piping and wiring are applied Disassembled perspective view of decorative cover for cover and cover Perspective view of the back side of the through-hole decorative cover Front view of decorative cover for through hole Rear view of through-hole decorative cover Side view of through-hole decorative cover VIII-VIII sectional view taken on the line in FIG. An enlarged cross-sectional side view of the main part showing the mounting state of the three pipe types in the sleeve made of rigid polyvinyl chloride The expanded sectional side view of the principal part which shows 2nd Embodiment of this invention The expanded sectional side view of the principal part which shows 3rd Embodiment of this invention

Explanation of symbols

A structure (concrete structure)
B Cosmetic cover P Piping X Axis 1 Wall body 2 Through hole 3 Sleeve 3a Inner peripheral surface 4 Cover body 5 First locking piece 5a Tip edge 5b Maximum outer radius 6 Second locking body 6a Tip 8

Claims (8)

  Inserted into the sleeve at multiple locations in the circumferential direction of the annular cover body that covers the open end face of the through hole forming sleeve embedded in the structure, and protrudes outward from the inner peripheral surface of the sleeve. The first locking piece that elastically deforms inward in the radial direction is extended in a cantilevered manner along the axial direction of the through-hole, and at least a part of the first locking piece includes A decorative cover for a through-hole of a structure in which a second locking piece protruding outward from a maximum outer radius portion is provided in a cantilever state that can be elastically deformed radially inward.   Formed in an arc shape or a polygonal shape with maximum outer radius portions larger than the inner radius of the sleeve at multiple locations in the circumferential direction of the annular cover body covering the open end face side of the through hole forming sleeve embedded in the structure And a first locking piece that elastically deforms radially inward as it is inserted into the sleeve extends in a cantilevered manner along the axial direction of the through-hole, and at least part of the first locking piece. The one locking piece is provided with a second locking piece that protrudes outward from the maximum outer radius portion thereof in a cantilevered state that can be elastically deformed radially inward. cover.   The decorative cover for a through-hole of a structure according to claim 1 or 2, wherein the second locking piece is extended in a cantilevered state toward the cover main body starting from the distal end side of the first locking piece.   The through-hole of the structure according to any one of claims 1 to 3, wherein the second locking piece is provided in a state of being deviated toward a tip side from a maximum outer radius portion of the first locking piece. Cosmetic cover.   The decorative cover for through-holes of a structure according to any one of claims 1 to 4, wherein the cover body, the first locking piece, and the second locking piece are integrally formed.   The decorative cover for a through-hole of a structure according to any one of claims 1 to 5, wherein a tip edge of the first locking piece is formed in a semicircular arc shape or a semipolygonal shape.   The decorative cover for a through-hole of a structure according to claim 2, wherein a hole is formed in the arc-shaped or polygonal-shaped portion of the first locking piece.   The decorative cover for a through-hole of a structure according to claim 7, wherein the second locking piece is formed by being punched out in a state of being continuous with the hole of the first locking piece.

Images