Sealing member for sprinkler head

Abstract

To provide a sealing member for a sprinkler head which can be attached to the sprinkler head provided so as to largely protrude from a ceiling surface or the like without generating a gap between the sprinkler head and the ceiling surface, and facilitates product management.SOLUTION: A sealing member 1 for a sprinkler head according to the present invention is attached to a sprinkler head 5 whose tip portion protrudes from an attachment hole 7 formed in a ceiling surface 3 toward a floor side to cover a gap between the attachment hole 7 and the sprinkler head 5, and includes: a sealing plate 9 having a cylindrical fixing portion 13 fixed to an outer peripheral surface of the sprinkler head 5 and a disk-shaped plate portion 15 protruding outward from a lower end of the fixing portion 13; and a spacer 11 disposed between the plate portion 15 and the ceiling surface 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sealing member for a sprinkler head that is attached to a sprinkler head that is installed on a ceiling surface or the like. [Background technology]

[0002] Conventionally, a sprinkler head installed on a ceiling surface or the like in a room is generally equipped with a sealing plate.

[0003] For example, as shown in Figure 4 of Patent Document 1, when a sprinkler head 10 is installed in a through-hole 14 provided in a ceiling 13, a gap is generated between the outer peripheral surface of the sprinkler head 10 and the inner peripheral surface of the through-hole 14. In order to cover this gap, a sealing plate 15 is attached to the sprinkler head 10.

[0004] The sealing plate 15 has a cylindrical portion 16 and a plate portion 17 formed at the lower end of the cylindrical portion 16. A protrusion 16A is provided on the inner peripheral surface of the cylindrical portion 16, and the sealing plate 15 is attached to the sprinkler head 10 by engaging the protrusion 16A with an engaging groove 18 provided on the outer peripheral surface of the sprinkler head 10.

[0005] By attaching the sealing plate 15 to the sprinkler head 10, the gap that occurs between the sprinkler head 10 and the through-hole 14 is covered and hidden by the plate portion 17. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-161395 Summary of the Invention [Problem to be solved by the invention]

[0007] As described above, the sealing plate is intended to cover the gap between the mounting hole and the sprinkler head, and therefore must be attached to the sprinkler head so that the plate portion is in contact with the surface of the ceiling. However, if the sprinkler head is installed so that it protrudes significantly into the room, the plate portion of the sealing plate may not come into contact with the ceiling surface.

[0008] For example, in the case of FIG. 4 of Patent Document 1, a nozzle 12 provided at the top of a sprinkler head 10 is connected to a pipe P above the ceiling, and a thermal decomposition section 11 provided at the bottom protrudes into the room. Therefore, if this pipe P is installed closer to the ceiling 13, the lower part of the sprinkler head 10 will protrude further into the room, creating a gap between the plate portion 17 and the surface of the ceiling 13.

[0009] When installing a new sprinkler head, the piping can be arranged so that the sealing plate can contact the ceiling surface. However, when replacing an existing old sprinkler head with a new sprinkler head, the new sprinkler head is attached to the piping that was arranged to match the old sprinkler head, so the sealing plate may not contact the ceiling surface.

[0010] Therefore, in the past, special sealing plates have been used to address the above-mentioned problems. The special-purpose sealing plate is formed so that the outer edge of the plate part is raised. Therefore, even if a standard sealing plate would leave a gap between it and the ceiling surface, by using the special-purpose sealing plate, the ceiling plate can be installed so that the top of the raised part touches the ceiling surface.

[0011] However, the size of the gap between the plate and the ceiling surface when using a standard ceiling plate varies depending on the site. Therefore, multiple types of special-purpose ceiling plates with different raised part heights, for example in 5mm increments, had to be prepared and used depending on the site, making product management cumbersome.

[0012] The present invention has been made to solve the above-mentioned problems, and aims to provide a sealing member for sprinkler heads that can be attached to sprinkler heads that are installed so that they protrude significantly from a ceiling surface, etc., without creating a gap between the sprinkler head and the ceiling surface, and that also makes product management easy. [Means for solving the problem]

[0013] (1) The sprinkler head sealing member according to the present invention is attached to a sprinkler head whose tip protrudes toward the floor from a mounting hole formed in a ceiling surface, and covers and conceals the gap between the mounting hole and the sprinkler head. A sealing plate having a cylindrical fixing portion fixed to the outer peripheral surface of the sprinkler head and a disk-shaped plate portion extending outward from the lower end of the fixing portion; and a spacer disposed between the plate portion and the ceiling surface.

[0014] (2) In addition, in the device described in (1) above, the spacer is characterized in that it is made up of a plurality of spacers stacked in the vertical direction.

[0015] (3) In the above (2), the spacer has a lower surface side engaging portion formed on the lower surface and an upper surface side engaging portion formed on the upper surface, the lower surface engaging portion engages with the upper surface of the sealing plate or the upper surface engaging portion of another spacer; The upper surface side engaging portion is characterized in that it can be engaged with the lower surface side engaging portion of another spacer.

[0016] (4) In addition, in the device described in any one of (1) to (3) above, the spacer is characterized by being made of a circular ring-shaped member.

[0017] (5) Furthermore, in the above (4), the annular member is provided with a positioning portion that protrudes radially inward on the inner surface thereof and abuts or engages with the outer peripheral surface of the fixing portion to position the spacer radially. [Effects of the Invention]

[0018] In the present invention, by providing a spacer, even a sprinkler head that is provided so as to protrude significantly from a ceiling surface or the like can be attached without creating a gap between the sprinkler head and the ceiling surface. In addition, although the size of the gap between the plate part of the sealing plate and the ceiling surface varies depending on the installation state of the sprinkler head, the present invention can accommodate these by changing the number of spacers. Also, since it can be adapted to many sites using only two types of components, the sealing plate and the spacer, product management is easier than in the past, when different shapes of special-purpose sealing plates were used. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is an external view of a sprinkler head sealing member according to an embodiment attached to a sprinkler head. FIG. [Figure 2] FIG. 2 is a cross-sectional view illustrating the sealing member for the sprinkler head of FIG. 1. [Figure 3] 3(a) and 3(b) are views showing the sealing plate of FIG. 1 alone, with FIG. 3(a) being a bottom view and FIG. 3(b) being a cross-sectional view taken along the line AA of FIG. 3(a). [Figure 4] FIG. 2 is a perspective view showing the spacer of FIG. 1 alone. [Figure 5] 5(a) is a plan view of the spacer of FIG. 4, and FIG. 5(b) is a cross-sectional view taken along the line BB in FIG. 5(a). [Figure 6] FIG. 3 is an enlarged view of the area surrounded by the dashed line in FIG. 2. [Figure 7] 10A and 10B are diagrams showing other examples of combinations of sealing plates and spacers in a sealing member for a sprinkler head according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] A sealing member 1 for a sprinkler head according to one embodiment of the present invention (hereinafter simply referred to as "sealing member 1") will be described with reference to Figures 1 to 6. In the following description, the directions of up and down are based on the installation state shown in Figure 1, with "up" referring to the ceiling side and "down" referring to the floor side in the installation state.

[0021] FIG. 1 is an external view of a sealing member 1 attached to a sprinkler head 5 installed on a ceiling surface 3, as viewed from inside a room. As shown in Fig. 2, sprinkler head 5 is installed in mounting hole 7 formed in ceiling surface 3. The base end of sprinkler head 5 is connected to a pipe (not shown) installed above the ceiling, and the tip protrudes from mounting hole 7 toward the indoor side (floor side).

[0022] The mounting hole 7 is made slightly larger than the maximum outer diameter of the sprinkler head 5, and when the sprinkler head 5 is installed, a gap S is created between the inner surface of the mounting hole 7 and the outer surface of the sprinkler head 5. The sealing member 1 of this embodiment is intended to cover and conceal this gap S from the indoor side, and includes a sealing plate 9 and a spacer 11. Each component will be described in detail below.

[0023] <Sealing plate> As shown in FIG. 3, the sealing plate 9 has a cylindrical fixing portion 13 and a disk-shaped plate portion 15 that projects outward from the lower end of the fixing portion 13.

[0024] The fixing portion 13 is a portion fixed to the outer peripheral surface of the sprinkler head 5, and its peripheral wall is provided with a plurality of slits 17 with open upper ends. In addition, on the inner peripheral surface of the fixing portion 13, claw portions 19 are provided between each slit 17. The claw portion 19 is formed so as to be able to engage with an engagement groove (not shown) provided on the outer periphery of the sprinkler head 5, allowing the sealing plate 9 to be attached and detached freely to the sprinkler head 5. In addition, the mounting position of the sealing plate 9 relative to the sprinkler head 5 can be adjusted by approximately 5 mm in the vertical direction.

[0025] Plate portion 15 is a portion that covers gap S from below, and its outer diameter is set to be larger than that of mounting hole 7. Plate portion 15 also has a shape that slopes upward from the lower end of fixing portion 13 toward the ceiling surface.

[0026] The sealing plate 9 in the present invention is not limited to the one described above, and any conventional standard sealing plate can be used as long as it has a cylindrical fixed portion and a plate portion that protrudes outward from the lower end of the fixed portion.

[0027] <Spacer> The spacer 11 is a member arranged singly or in multiple layers between the plate portion 15 of the above-mentioned sealing plate 9 and the ceiling surface 3. As shown in Figures 4 and 5, the spacer 11 has an annular peripheral wall portion 21 (an annular member of the present invention) and three positioning portions 23 provided on the inner surface of the peripheral wall portion 21. In this embodiment, the height of the peripheral wall portion 21 is approximately 5 mm, but the height of the peripheral wall portion 21 is not limited to this and can be set appropriately.

[0028] As shown in the enlarged view of Figure 5(b), the peripheral wall portion 21 has a lower surface side engaging portion 25 formed on the outer peripheral edge portion of the lower surface, and an upper surface side engaging portion 27 formed on the outer peripheral edge portion of the upper surface.

[0029] The lower surface engaging portion 25 is provided so as to protrude downward along the entire outer peripheral edge of the lower surface of the peripheral wall portion 21, and its inner diameter is set slightly larger than the outer diameter of the plate portion 15 of the sealing plate 9. As a result, when the spacer 11 is placed on the plate portion 15, the plate portion 15 fits inside the lower surface side engagement portion 25, as shown in Figures 2 and 6 (an enlarged view of the dashed line portion in Figure 2). The protruding height of the lower surface side engaging portion 25 may be sufficient to catch the outer periphery of the plate portion 15, and may be, for example, about 0.3 mm.

[0030] Furthermore, the outer diameter of the spacer 11 is slightly larger than the outer diameter of the plate portion 15; specifically, since the radial thickness of the lower surface side engagement portion 25 is approximately 0.5 mm, it is approximately the outer diameter of the plate portion 15 + 1 mm. In the present invention, the lower surface engaging portion 25 is not essential, so if the spacer 11 does not have the lower surface engaging portion 25, the outer diameter of the spacer 11 and the outer diameter of the plate portion 15 can be the same.

[0031] The upper surface side engaging portion 27 is provided so as to be engageable with the lower surface side engaging portion 25 of another spacer 11, and is formed by cutting out the outer peripheral edge portion of the upper surface of the peripheral wall portion 21 along the entire periphery. The outer shape of the upper surface side engaging portion 27 is the same as the outer shape of the plate portion 15, so that the upper surface side engaging portion 27 also fits inside the lower surface side engaging portion 25. By providing the upper surface engaging portion 27, when two or more spacers 11 are stacked, as shown in Figure 6, the lower surface engaging portion 25 of the upper spacer 11 fits into the upper surface engaging portion 27 of the lower spacer 11, and the outer surfaces of the stacked spacers 11 become flush.

[0032] As described above, by providing the upper surface engagement portion 27, the outer surfaces of the stacked spacers 11 become flush, but since the top spacer 11 comes into contact with the ceiling surface 3, the upper surface engagement portion 27 of that spacer 11 has a recessed appearance. However, since the upper surface engaging portion 27 has a shape corresponding to the lower surface engaging portion 25, the notch height is about 0.3 mm and the notch width is about 0.5 mm, so it can be said that there is almost no effect on the appearance. It is also possible to set the radial thickness of the lower engaging portion 25 larger. In that case, the diameter of the circular recess formed by the lower engaging portion 25 becomes smaller, and the outer dimensions of the plate portion 15 and the upper engaging portion 27 are set smaller accordingly. However, doing so would also increase the thickness of the peripheral wall portion 21, which would increase the weight of the spacer 11 and the amount of material used.

[0033] As shown in FIG. 5(a), the positioning portion 23 is provided on the inner surface of the peripheral wall portion 21 so as to protrude radially inward. The tip of the positioning portion 23 is provided with a contact portion 23a that is curved to fit along the outer peripheral surface of the fixing portion 13 of the sealing plate 9. When the sealing plate 9 is combined with the spacer 11, the contact portion 23a of each positioning portion 23 comes into contact with or close to the outer peripheral surface of the fixing portion 13, as shown in FIG.

[0034] By providing the positioning portion 23 on the spacer 11, when combining the spacer 11 with the sealing plate 9, it is only necessary to insert the fixing portion 13 of the sealing plate 9 into the area surrounded by the three abutment portions 23a, making it easy to position the spacer 11 radially. Furthermore, by providing the positioning portion 23, the lower surface side engaging portion 25 of the spacer 11 and the plate portion 15 can be easily fitted together and are less likely to come off. Furthermore, when stacking the spacers 11, the lower surface side engaging portion 25 and the upper surface side engaging portion 27 are less likely to come off.

[0035] In this embodiment, an example in which three positioning portions 23 are provided is shown, but the number of positioning portions 23 is not limited to this and may be two or four or more. Note that even when only one positioning portion is provided, a certain degree of positioning effect can be expected, but since it abuts against the fixed portion 13 at one point, it is prone to misalignment. Therefore, by providing multiple positioning portions 23 at equal intervals in the circumferential direction, the spacer 11 is less likely to shift radially after installation, and the engagement portions between the spacer 11 and the sealing plate 9, and the engagement portions between the spacers 11, are less likely to come loose, which is preferable.

[0036] Moreover, adjacent positioning portions 23 may be connected to each other to form a ring shape. That is, the abutting portion 23a may be formed in the center of the inner side of the peripheral wall portion 21, and may be formed as a hole on the inside through which the fixing portion 13 can be inserted.

[0037] The shape of positioning portion 23 shown in this embodiment is an example, and contact portion 23a does not necessarily have to have a shape that follows the shape of fixed portion 13. However, it is preferable that contact portion 23a has a shape that follows the outer peripheral surface of fixed portion 13, as in this embodiment, because the contact surface with fixed portion 13 becomes larger and misalignment is less likely to occur.

[0038] In the above, an example has been described in which the positioning portion 23 abuts against the outer peripheral surface of the fixed portion 13 to position the spacer 11 radially, but it is also possible to have the positioning portion 23 engage with the outer peripheral surface of the fixed portion 13. For example, an engaging portion may be provided on the outer surface of the fixing portion 13 with which the tip of the positioning portion 23 can engage, and by engaging the tip of the positioning portion 23 with this engaging portion, it is possible to position the spacer 11 radially and prevent it from shifting position after installation.

[0039] The sealing member 1 of this embodiment configured as described above can be used with the sealing plate 9 alone, or with one or more spacers 11 combined with the sealing plate 9. While Figures 1 and 2 show an example in which three spacers 11 are combined with the sealing plate 9, other combination examples are shown in Figure 7.

[0040] 7(a-1) to 7(c-1) are external views of other combination examples, and FIG. 7(a-2) to FIG. 7(c-2) are cross-sectional views of each example. Here, FIGS. 7(a-1) and 7(a-2) show an example in which only the sealing plate 9 is attached to the sprinkler head 5 without using the spacer 11. FIG. As in the examples of Figures 7(a-1) and 7(a-2), when the sprinkler head 5 does not protrude significantly from the ceiling surface 3 and the plate portion 15 of the sealing plate 9 comes into contact with the ceiling surface 3, it is advisable to install only the sealing plate 9 as in the conventional case without using the spacer 11.

[0041] Figures 7(b-1) and 7(b-2) show examples in which a sealing member 1 is attached to a sprinkler head 5 that is installed protruding 5 mm further downward than the examples in Figures 7(a-1) and 7(a-2). If the sealing plate 9 were to be attached alone to the sprinkler head 5 shown in Figure 7(b-2), a gap of about 5 mm would be created between the plate portion 15 and the ceiling surface 3. Therefore, by combining one spacer 11 with the sealing plate 9 and attaching it to the sprinkler head 5 as shown in the figure, the spacer 11 comes into contact with the ceiling surface 3, and the gap S can be covered.

[0042] Figures 7(c-1) and 7(c-2) show examples in which a sealing member 1 is attached to a sprinkler head 5 that is installed so as to protrude 10 mm further downward than the examples in Figures 7(a-1) and 7(a-2). In this case, by combining two spacers 11 with a sealing plate 9 and attaching them to the sprinkler head 5 as shown in the figures, it is possible to cover up the gap S without creating a gap between the ceiling surface 3, as in the other examples.

[0043] Furthermore, if a gap of about 15 mm occurs between the plate portion 15 and the ceiling surface 3, it is advisable to combine three spacers 11 as in the example shown in FIGS. In this way, the number of spacers 11 to be combined can be changed as appropriate depending on the installation state of the sprinkler head 5, making it possible to adapt to various sites.

[0044] As mentioned above, the mounting position of the sealing plate 9 relative to the sprinkler head 5 can be adjusted up and down by approximately 5 mm. Therefore, if the position of the sprinkler head 5 relative to the ceiling surface 3 is lower than the specified position by a range of 0 mm or more and less than 5 mm, it is possible to adjust it using only the sealing plate 9 without using the spacer 11. It is advisable to combine spacers 11 appropriately, for example, if the position of the sprinkler head 5 is 5 mm or more but less than 10 mm below the specified position, one spacer 11 is used, and if the position is 10 mm or more but less than 15 mm below, two spacers 11 are used.

[0045] As described above, the sealing member 1 of this embodiment is equipped with the spacer 11, so that it can be attached to a sprinkler head 5 that is installed so as to protrude significantly from the ceiling surface 3 without creating a gap between it and the ceiling surface 3.

[0046] Furthermore, the number of spacers 11 combined with the sealing plate 9 can be changed as appropriate depending on the installation state of the sprinkler head 5, making it adaptable to a variety of sites.

[0047] In addition, since the sealing member 1 of this embodiment consists of only two types of members, the sealing plate 9 and the spacer 11, product management is easier than in the past, in which several types of special-purpose sealing plates were used depending on the installation state of the sprinkler head 5.

[0048] Furthermore, in this embodiment, by providing a lower surface engaging portion 25 on the spacer 11, when the spacer 11 is placed on the plate portion 15, the plate portion 15 of the sealing plate 9 fits inside the lower surface engaging portion 25, making it less likely that the spacer 11 will become misaligned. Furthermore, by providing an upper surface engaging portion 27 on the spacer 11, when multiple spacers 11 are stacked, the lower surface engaging portion 25 of the upper spacer 11 engages with the upper surface engaging portion 27 of the lower spacer 11, so that the outer surfaces of both spacers 11 become flush. This improves the appearance of the sealing member 1 and also makes the installation work smoother.

[0049] Furthermore, by providing the positioning portion 23 on the spacer 11, it becomes easier to position the spacer 11 in the radial direction, and the engagement portion between the sealing plate 9 and the spacer 11, and the engagement portions between the spacers 11, become less likely to come off.

[0050] In the above embodiment, the spacer 11 having the annular peripheral wall portion 21 is exemplified, but the spacer of the present invention is not limited to being made of an annular member. For example, a doughnut-shaped member having an outer diameter substantially the same as the outer diameter of the plate portion 15 and an inner diameter substantially the same as the outer diameter of the fixing portion 13 can be used as the spacer. [Explanation of symbols]

[0051] 1. Sealing material (for sprinkler heads) 3 Ceiling surface 5 sprinkler heads 7 Mounting holes 9 Sealing Plate 11 Spacer 13 Fixed part 15 Plate section 17 Slit 19 Claw 21 Peripheral wall section 23 Positioning part 23a Contact part 25 Lower engagement part 27 Top side engaging part

Claims

1. A sealing member for a sprinkler head is attached to a sprinkler head whose tip protrudes toward a floor from a mounting hole formed in a ceiling surface, and covers and conceals a gap between the mounting hole and the sprinkler head, A sealing plate having a cylindrical fixing portion fixed to the outer peripheral surface of the sprinkler head and a disk-shaped plate portion extending outward from the lower end of the fixing portion; A sealing member for a sprinkler head, comprising: a spacer disposed between the plate portion and the ceiling surface.

2. The sealing member for a sprinkler head according to claim 1 , wherein the spacer comprises a plurality of spacers stacked vertically.

3. the spacer has a lower surface side engaging portion formed on a lower surface and an upper surface side engaging portion formed on an upper surface, the lower surface engaging portion engages with the upper surface of the sealing plate or the upper surface engaging portion of another spacer; 3. The sealing member for a sprinkler head according to claim 2, wherein the upper engaging portion is capable of engaging with the lower engaging portion of another spacer.

4. 4. The sealing member for a sprinkler head according to claim 1, wherein the spacer is made of an annular member.

5. A sealing member for a sprinkler head as described in claim 4, characterized in that it has a positioning portion that protrudes radially inward on the inner surface of the annular member and abuts or engages with the outer peripheral surface of the fixing portion to radially position the spacer.

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