Handrail cap

Abstract

To provide a handrail coping that improves ease of installation and also provides a good finish. [Solution] The handrail capping 10 is formed by covering a core material 20 of the capping with a covering 30. The core material 20 has four support parts 21, 22, 23, and 24 that abut against the covering 30, three recesses 20A, 20B, and 20C between adjacent support parts, and a locking part 25 provided at the end of a pair of support parts located on the open part 31 side. The covering 30 locks the locking part 33 at the edge of the open part 31 to the locking part 25 of the core material 20. The covering 30 is attached to the core material 20 and has a flexible main body 32, a locking portion 33 made of semi-rigid synthetic resin, and a surface portion 34 that covers the main body 32. The locking portion 33 has a connecting portion 33A to which the main body 32 is joined, an extension portion 33B that extends inward to the covering 30, and a claw portion 33C that protrudes toward the locked portion 25. The thickness of the main body 32 is greater at the position of the recess than at the position of the support portion.

Description

TECHNICAL FIELD

[0001] The present invention relates to a handrail coping. BACKGROUND ART

[0002] A handrail coping formed by covering a core material of the coping with a covering body is disclosed (see Patent Document 1). The covering body has a cross-sectional shape that is open to one side by an opening portion narrower than the core material. The covering body is attached to the core material by engaging an engaging portion provided in the opening portion with the open edge of the core material. Further, the covering body is configured by integrally molding a main body portion made of soft resin, and the engaging portion and the surface portion made of semi-rigid synthetic resin through three-layer molding. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0003] PATENT DOCUMENT 1 Japanese Unexamined Patent Application Publication No. 2014-80743 SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION

[0004] However, in the case of the conventional example described above, it is difficult to attach the engaging portion of the covering body to the core material at portions where the handrail coping is installed in a bent state, such as external corners and internal corners of corridors, and turn-back stairs. Particularly in cold seasons, the resin of the covering body hardens, and it is considered that the engaging portion of the covering body becomes even more difficult to attach to the core material.

[0005] The present invention aims to provide a handrail coping that improves construction workability and also has a good finished appearance. MEANS FOR SOLVING THE PROBLEM

[0006] The handrail cap according to the first embodiment is a handrail cap formed by covering a core material of the cap with a covering having a cross-sectional shape that is open to one side by an opening narrower than the core material, wherein both the core material and the covering are formed in a substantially C-shaped cross-sectional shape that is open to one side, the core material has four support portions that abut against the covering, three recesses between adjacent support portions that do not abut against the covering, and a pair of locking portions that extend in a direction toward each other from the ends of the support portions located on the open side, and the covering is configured to lock the locking portions formed on the edge of the open portion with the locking portions locally formed on the open edge of the core material The covering is attached to the core material and comprises a main body made of a synthetic resin base material in which the amount of plasticizer added is adjusted so that it is flexible enough to be spread open with fingers at room temperature and placed over the core material; a locking portion made of semi-rigid synthetic resin; and a surface portion that covers the main body. The locking portion comprises a connecting portion connected to the open end of the main body and extending to the edge of the open; an extension portion extending inward from the edge to the covering; and a claw portion projecting from the extension portion so as to fold back toward the locked portion. The thickness of the main body at the position of the recess is greater than the thickness of the main body at the position of the support portion.

[0007] Furthermore, since the thickness of the main body at the recessed portion of the covering is greater than the thickness of the main body at the support portion, wrinkles do not form on the inner covering portion where the handrail cap is bent for installation, and the marks of the core material do not become visible on the outer covering portion.

[0008] A second embodiment is a handrail cap according to the first embodiment, wherein the thickness of the portion of the support portion that is in contact with the end portion that is continuous with the recess is greater than the thickness of the portion that is in contact with the end portion that is further away from the recess.

[0009] With this handrail capping, the thickness of the covering material is set in this way, which further suppresses the appearance of core material marks on the outer covering material in the parts where the handrail capping is bent during installation.

[0010] In the third embodiment, in the handrail capping according to the first or second embodiment, a first gap is formed between the tip of the claw portion and the support portion on the open portion side of the core material, and a second gap is formed between the locked portion and the connecting portion of the covering body.

[0011] In this handrail cap, the first and second gaps ensure a range of motion for the locking part when locking it to the locked part, thereby improving the ease of installation of the covering material onto the core material.

[0012] The fourth embodiment is a handrail capping according to any one of the first to third embodiments, in which, with the open portion facing vertically downward, the first extension line L is defined as a line extending in the thickness direction of the covering from the boundary between the support portion on the open portion side of the core material and the locked portion, and the second extension line U is defined as a line extending horizontally from the upper surface of the locked portion that engages with the claw portion. The boundary between the main body portion of the covering and the connecting portion of the locked portion is set between the position where the first extension line intersects the covering and the position where the second extension line intersects the covering.

[0013] In this handrail cap, the boundary between the main body and the locking part of the covering is set within an appropriate range, thus achieving both ease of attachment of the covering to the core material and difficulty in removing the covering from the core material. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide a handrail coping that improves workability and also has a good finish. [Brief explanation of the drawing]

[0015] [Figure 1] This is a cross-sectional view showing a handrail device. [Figure 2] This is an enlarged cross-sectional view showing the handrail cap. [Figure 3] This is an enlarged view of section B in Figure 2. [Modes for carrying out the invention]

[0016] The embodiments for carrying out the present invention will be described below with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same or similar components. In the embodiments described below, descriptions and reference numerals that are repeated may be omitted. Furthermore, the drawings used in the following description are all schematic, and the dimensional relationships and ratios of each element shown in the drawings do not necessarily correspond to reality. Also, the dimensional relationships and ratios of each element do not necessarily correspond between multiple drawings.

[0017] For convenience, descriptions of the upper and lower sides, etc., will be based on the state in which the open portion 31 side of the covering body 30, described later, is facing vertically downwards.

[0018] In Figures 1 to 3, the handrail capping 10 according to this embodiment is used in a handrail device 1. The handrail device 1 includes, for example, a substantially L-shaped bracket 12 that is attached to a vertical structural wall 11, and a handrail capping 10. A capping fixing portion 13 is provided at the upper end of the bracket 12. A wall fixing portion 16 is provided at the end of the bracket 12 opposite to the capping fixing portion 13. The bracket 12 is fixed to the structural wall 11 at the wall fixing portion 16. Specifically, for example, a nut plate 14 is provided on the back side of the structural wall 11, and a bolt 15 that screws into the nut plate 14 penetrates the structural wall 11 and the wall fixing portion 16 of the bracket 12. The wall fixing portion 16 is fixed to the structural wall 11 by fastening a washer 17 and a nut 18 to this bolt 15. The handrail capping 10 is formed by covering a core material 20 of the capping with a covering 30.

[0019] The core material 20 is formed in a substantially C-shaped cross-section that is open to one side, and has four support portions 21, 22, 23, and 24 that come into contact with the covering 30, three recesses 20A, 20B, and 20C between adjacent support portions that do not come into contact with the covering 30, and a locking portion 25.

[0020] As illustrated, when the open portion 31 side of the covering body 30 is defined as the lower side, the support portions 21 and 22 are located on the upper side, and the support portions 23 and 24 are located on the lower side. The corner portions of the sections that descend from the support portions 21, 22 into the recess 20A, the corner portions of the sections that descend from the support portions 21, 23 into the recess 20B, and the corner portions of the sections that descend from the support portions 22, 24 into the recess 20C are each formed to have an arcuate cross-section. Among these corner portions, the radius of curvature of the corner portion of the section that descends from the support portions 21, 22 into the recess 20A is set to be larger than the radii of curvature of the other corner portions.

[0021] On each surface of the support portions 21, 22, 23, 24, a plurality of grooves 26 extending in the longitudinal direction of the core material 20 are provided to suppress positional displacement of the covering body 30 relative to the core material 20. Inside the core material 20, for example, a top surface 28 against which the upper end of the coping fixing portion 13 of the bracket 12 abuts, and two abutting portions 29 against which at least one side surface of the coping fixing portion 13 abuts are provided on each of the left and right sides.

[0022] The coping fixing portion 13 of the bracket 12 is inserted from below into the core material 20 through the open portion 31 of the covering body 30. The core material 20 is fixed to the coping fixing portion 13 using a screw 19. The screw 19 penetrates the wall portion of the core material 20 at the position of the recess 20C and is threadedly engaged with the coping fixing portion 13. The head of the screw 19 is, for example, configured to be accommodated in the recess 20C. In other words, the width and depth of the recess 20C are set so as to be able to accommodate the head of the screw 19.

[0023] The locked portion 25 is locally formed at the open end edge of the core material 20, and extends in the direction approaching each other from the ends of the pair of support portions 23, 24 located on the open portion 31 side of the covering body 30. In other words, the locked portion 25 is provided in a cantilevered manner at the ends of the support portions 23, 24. When the open portion 31 side of the covering body 30 is defined as the lower side, the core material 20 is formed symmetrically left and right, and the locked portions 25 face each other in the horizontal direction. The upper surface (inner side surface) 25A of the locked portion 25 is, for example, a horizontal plane. The lower corner portion at the tip of the locked portion 25 is, for example, formed to have an arcuate cross-section.

[0024] The covering 30 has a cross-sectional shape that is open to one side by an opening 31 that is narrower than the core material 20, and is formed in a substantially C-shaped cross-sectional shape that is open to one side. The covering 30 is composed of a main body portion 32, a locking portion 33, and a surface portion 34. The covering 30 is attached to the core material 20 by locking the locking portion 33, which is formed at the edge of the opening 31, to the locking portion 25.

[0025] The main body 32 is formed to be flexible enough that the amount of plasticizer added to the base material, which is made of synthetic resin, can be spread open with the fingers at room temperature to cover the core material 20 with the covering 30. The hardness of the main body 32 is set to 40 to 75 on the Shore A hardness scale.

[0026] As shown in Figure 2, the thickness T1 of the main body 32 at the locations of recesses 20A, 20B, and 20C is greater than the thickness T2 of the main body 32 at the locations of support parts 21, 22, 23, and 24. Furthermore, in the main body 32, for example, the thickness T3 of the portion of the support part 21 that is in contact with the end portion continuous with the recesses 20A and 20C may be greater than the thickness T2 of the portion in contact with the support part further away from the recess. The thickness T2 is measured in the circumferential direction of the covering 30, for example, at the central portion of the support part 21. The same applies to the thickness of the portion of the main body 32 that is in contact with other support parts.

[0027] The surface portion 34 is a skin made of, for example, synthetic resin that covers the main body portion 32. The hardness of the surface portion 34 is set to 70 to 95 on the Shore A hardness scale. The difference in hardness between the surface portion 34 and the main body portion 32 on the Shore A hardness scale is 30 or less. The surface portion 34 covers the connection portion 33A between the main body portion 32 and the locking portion 33. Alternatively, the surface portion 34 may cover only the main body portion 32 without covering the locking portion 33. Furthermore, the surface portion 34 and the locking portion 33 may be integrally molded from the same resin.

[0028] The locking portion 33 is made of a semi-rigid synthetic resin. The hardness of the locking portion 33 is set to 75 to 95 on the Shore A hardness scale. When the hardness of the main body portion 32 is 60 degrees, the hardness of the locking portion 33 is 80 to 90 degrees. The locking portion 33 has a connecting portion 33A that is connected to the open end of the main body portion 32 and extends to the edge of the open portion 31, an extension portion 33B that extends inward from the edge into the covering body 30, and a claw portion 33C that protrudes from the extension portion 33B so as to fold back toward the locked portion 25.

[0029] A first gap S1 is formed between the tip of the claw portion 33C and the support portions 23 and 24 on the open portion 31 side of the core material 20. A second gap S2 is also formed between the locking portion 25 and the connecting portion 33A. The first gap S1 and the second gap S2 ensure a range of motion for the locking portion 33 when the covering 30 is attached to the core material 20.

[0030] In Figure 3, the first extension line L is defined as the line extending in the thickness direction of the covering 30 from the boundary 35 between the support parts 23 and 24 on the open part 31 side of the core material 20 and the locked part 25. The second extension line U is defined as the line extending horizontally from the upper surface 25A of the locked part 25 that engages with the claw part 33C. In the handrail cap of this embodiment, the boundary 35 between the main body part 32 and the connection part 33A of the locked part 33 of the covering 30 may be set between the position where the first extension line L intersects the covering 30 and the position where the second extension line U intersects the covering 30. In this embodiment, the boundary 35 between the main body part 32 and the connection part 33A of the locked part 33 of the covering 30 is set at the position where the first extension line L intersects the covering 30 (see the boundary 35 shown as a solid line in Figure 3). Alternatively, as shown by the dashed line in Figure 3, for example, the boundary 35 can be set at the position where the second extension line U and the covering 30 intersect.

[0031] Here, Let the length of the connection part 33A be A4. Let A1 be the amount of protrusion of the claw portion 33C. Let A2 be the width of the claw portion 33C in the engagement direction between the claw portion 33C and the locked portion 25. When the maximum thickness of the extending portion 33B is defined as A3, A1, A2, and A3 may satisfy the relationships of the following Formulas 1 and 2. A2<2×A1 ···Formula (1) 2×A1<A4-A3···Formula (2)

[0032] (Function) The present embodiment is configured as described above, and the function thereof will be explained below. In FIG. 2, in the handrail coping 10 according to the present embodiment, the main body portion 32 of the covering body 30 covering the core material 20 is formed flexibly by adjusting the addition amount of the plasticizer to the base material made of synthetic resin, so that the opening portion 31 can be spread open with fingers at normal temperature to fit over the core material 20. In addition, the covering body 30 includes the main body portion 32, a locking portion 33, and a surface portion 34 covering the main body portion 32, and the locked portion 25 is wrapped from the outer side to the inner side of the core material 20 by the connecting portion 33A, the extending portion 33B, and the claw portion 33C in the locking portion 33, whereby the locking portion 33 can be locked to the locked portion 25. Since the locking portion 33 of the covering body 30 is formed of a semi-rigid synthetic resin, it is unlikely to come off from the locked portion 25, and the locked portion 25 is stably attached to the core material 20.

[0033] In addition, since the thickness T1 of the main body portion 32 at the positions of the recesses 20A, 20B, 20C is larger than the thickness T2 of the main body portion 32 at the positions of the support portions 21, 22, 23, 24, when the handrail coping 10 is applied to a bent portion of a continuous handrail such as a stair landing, wrinkles do not form on the inner covering body 30 at the relevant portion, and the imprint of the core material 20 on the outer covering body 30 at the relevant portion can be suppressed from appearing on the surface.

[0034] Furthermore, in the main body portion 32, the thickness T3 of the portion in contact with the end portion on the side continuous with the recesses 20A, 20B, 20C among the support portions 21, 22, 23, 24 is larger than the thickness T2 of the portion in contact with the position away from the recess from the relevant end portion, so that the imprint of the core material 20 on the outer covering body 30 at the portion where the handrail coping is installed in a bent state can be further suppressed from appearing on the surface.

[0035] By ensuring the range of motion of the locking portion 33 when locking it to the locked portion 25 using the first gap S1 and the second gap S2, the ease of attaching the covering 30 to the core material 20 can be further improved.

[0036] By setting the position of the boundary 35 between the main body portion 32 and the connection portion 33A of the locking portion 33 in the covering 30 to an appropriate range, it is possible to achieve both ease of attachment of the covering 30 to the core material 20 and difficulty in removing the covering 30 from the core material 20.

[0037] Thus, according to this embodiment, it is possible to provide a handrail cap 10 that is easy to install and has a good finish.

[0038] [Other embodiments] Although an example of an embodiment of the present invention has been described above, the embodiments of the present invention are not limited to those described above, and it goes without saying that various modifications can be made and implemented without departing from the spirit of the invention.

[0039] In the above-described embodiment, the handrail capping 10 was installed on a bracket 12 attached to a wall, but the present invention is not limited to this, and the handrail capping 10 may also be installed on a bracket attached to a support column erected on the floor. [Industrial applicability]

[0040] The technology disclosed herein can be used for handrail copings in which a core material is covered with a covering. [Explanation of symbols]

[0041] 1. Handrail device 10 Handrail cap 20 Core material 20A recess 20B recess 20C recess 21 Support part 22 Support part 23 Support part 24 Support part 25 Locked part 25A top 30 Covering 31 Open area 32 Main body 33 Locking part 33A Connection 33B Extension part 33C Claw part 34 Surface part 35 Boundary L 1st extension line Thickness of the main body at the location of the T1 recess Thickness of the main body at the T2 support point. In the T3 main body, the thickness of the portion of the support that is in contact with the end that is continuous with the recess. U 2nd extension line

Claims

1. A handrail cap is formed by covering a core material of the cap with a covering body having a cross-sectional shape that is open to one side by an opening narrower than the core material, The core material and covering of the coping are each formed in a substantially C-shaped cross-section with one side open, The core material has four support portions that contact the covering, three recesses between adjacent support portions that do not contact the covering, and a pair of locking portions that extend in a direction toward each other from the ends of the support portions located on the open side. The covering is attached to the core material by engaging a locking portion formed on the edge of the open portion with a locally formed locking portion on the open edge of the core material. The covering body comprises a main body portion formed to be flexible enough to be spread open with fingers at room temperature and placed over the core material by adjusting the amount of plasticizer added to the base material made of synthetic resin, a locking portion formed of semi-rigid synthetic resin, and a surface portion covering the main body portion. The locking portion has a connecting portion that is connected to the open end of the main body and extends to the edge of the open portion, an extending portion that extends from the edge inward to the covering body, and a claw portion that protrudes from the extending portion so as to fold back toward the locked portion. A handrail cap in which the thickness of the main body at the location of the recess is greater than the thickness of the main body at the location of the support.

2. The handrail capping according to claim 1, wherein the thickness of the portion of the main body that contacts the end of the support portion that is continuous with the recess is greater than the thickness of the portion that contacts the end further away from the recess.

3. A first gap is formed between the tip of the claw portion and the support portion on the open portion side of the core material. The handrail capping according to claim 1 or claim 2, wherein a second gap is formed between the locking portion and the connecting portion of the covering.

4. With the opening facing vertically downwards, The first extension line is defined as the line extending in the thickness direction of the covering from the boundary between the support portion on the open side of the core material and the locked portion. When the line extending horizontally from the upper surface of the locking portion that engages with the claw portion is defined as the second extension line, The handrail capping according to claim 1, wherein the boundary between the main body portion and the connecting portion of the locking portion in the covering is set between the position where the first extension line and the covering intersect and the position where the second extension line and the covering intersect.

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