JPH0212237Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to a cover for fasteners such as bolts in a heat-retaining prefabricated storage tank.

(Prior Art) In a heat-retaining prefabricated storage tank, a plurality of side wall panels are joined together to form a side wall, and the outer surfaces of these side wall panels are coated with a heat-insulating material such as urethane material. By the way, when inserting a partition inside the storage tank in this thermal insulation type prefabricated storage tank, a part of the insulation material on the outside of the side wall panel is cut out and a fastening hole such as a bolt hole is drilled in the side wall panel. The side wall panel and the partition material will be fastened together using fasteners such as bolts.

However, in this case, a cutout hole remains in the heat insulating material, and fasteners such as bolts are exposed to the outside through the cutout hole. FIG. 10 specifically shows this situation. In the figure, 100 is a side wall panel;
102 is a partition material, 104 is a heat insulating material on the outside of the side wall panel (106 is a resin coating layer covering the outer surface of the heat insulating material), and fasteners such as bolts 110 are exposed through the cutout hole 108 left in this heat insulating material 104. I end up doing it. This cutout hole 108 and the externally exposed fasteners such as bolts 110 spoil the appearance of the storage tank, and the heat insulation material is naturally missing in the cutout hole 108, so the heat retention of the storage tank is also reduced. Moreover, there is also the problem that rainwater or the like may enter the inside of the heat insulating material 104 through the cutout holes 108.

In order to prevent this, a cover as shown in FIGS.
This is done by attaching it to the body part of the body. The cover 112 shown in FIGS. 10 and 11 has a shallow dish shape with an annular peripheral edge and an engaging hole in the center, and the peripheral edge is connected to the heat insulating material 104.
When the engagement hole is pressed against the outer surface of the bolt 11
It is fitted onto the shaft of 0 and fastened.

On the other hand, the cover 114 shown in FIG. 12 covers the inner circumferential surface of the notch hole 108 of the heat insulating material to prevent rainwater from entering the inside of the heat insulating material 104. It is formed into a cylindrical shape corresponding to the shape of.

(Problems to be Solved by the Invention) However, the cover 112 shown in FIGS. 10 and 11 has the problem that it easily comes off the bolt shaft, and the tip of the bolt shaft cannot be seen through the engagement hole of the cover 112. There is a problem that some parts are exposed to the outside.

On the other hand, although the cover 114 shown in FIG. 12 can effectively prevent rainwater from entering the inside of the heat insulating material 104, fasteners such as bolts remain exposed to the outside.

In addition, as a cover that covers this fastener, as shown in FIG. 13, there is a cover 120 that includes a first storage part 116 that stores a nut and a second storage part 118 that stores a bolt shaft part. is known (Japanese Utility Model Publication No. 60-148292), but this cover 120 is intended for a single-plate assembly type storage tank where the heat insulating material 104 is not attached, and it is intended to be used with a notch in the heat insulating material. It is difficult to use it to cover holes.

(Means for solving the problem) The fastener cover of the present invention was devised to solve the above problem, and its gist is to connect a plurality of side wall panels to each other to form a side wall. In a heat-retaining prefabricated storage tank in which the outer surface of the side wall panel is covered with a heat insulating material, the axis of the fastener insertion hole formed when providing the fastener insertion hole in the side wall panel. A cylindrical cover body with a bottom at one end, the cover covering a hole in a heat insulating material formed by cutting out a peripheral part of the center and a fastener exposed from the hole;
a flange formed on the outer circumferential surface of the cover body at a position a certain distance apart along the axis from one end of the opening side of the cover body, and the opening side of the cover body is located inside the cutout hole of the heat insulating material. The flange is fitted directly or indirectly into the peripheral edge of the cutout hole.

(Function) As described above, the cover of the present invention has a cylindrical shape with a bottom as a whole, and does not have a through hole for engaging with fasteners, so fasteners such as bolts can be inserted into the notches of the heat insulating material. The holes can be almost completely covered. This improves the appearance of the storage tank and improves heat retention.

Furthermore, when this cover is installed in the notch hole, the flange on the outer periphery is in close contact with the periphery of the notch hole in the insulation material, which prevents the cover from wobbling and prevents rainwater from entering the inside of the notch hole. be prevented from doing so. Therefore, rainwater is also prevented from penetrating into the heat insulating material from the inner peripheral surface of the notch hole.

In addition, since the cover of the present invention has a cylindrical shape with a bottom, that is, a box shape, it is possible to store a heat insulating material inside, thereby further improving the heat retention of the storage tank. can be done. This is also one of the features of the present invention.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 4. In FIG. 2, reference numeral 10 indicates a side wall panel of the storage tank, and a plurality of these side wall panels 10 are joined together to form the side wall of the storage tank. Reference numeral 12 denotes a partition provided inside the storage tank, and as shown in FIG.
0.

In FIGS. 1 and 3, reference numeral 20 denotes a heat insulating material made of urethane that covers the side wall panel 10, and its outer surface is coated with a resin material 22. This heat insulating material 20 has a cutout hole 24 formed therein. This cutout hole 24 is formed into a bolt hole 15 in the side wall panel 10.
(Fig. 1) was formed when drilling.

In FIG. 1, reference numeral 26 is a bolt cover made of a soft material for closing the notch hole 24, and has a cover body 28 in the shape of a cylinder with a bottom. Inside the cover body 28, a cylindrical heat insulating material 36 made of urethane foam is disposed in close contact with the inner peripheral surface of the cover body 28, and on the inner surface of the bottom 35, the bolt shaft portion 18 is disposed. A fixing portion 24 for engagement with the cover body 28 is formed concentrically with the cover body 28.

On the other hand, a flange 30 is provided on the outer circumferential surface of the cover main body 28 at a position spaced apart from the open end thereof by a certain distance along the axis. In this figure and FIG. 4, reference numeral 32 denotes a ring-shaped urethane foam, and the flange 30 of the cover 26 is brought into close contact with the surface of the heat insulating material around the notch hole 24 via the urethane foam 32.

In the case of the bolt cover 26 described above, when the open side thereof is fitted into the notch hole 24 of the heat insulating material 20, the flange 30 on the outer circumferential surface is inserted into the urethane foam 3.
2, and the fixing part 24 on the inner surface of the bottom part 35 fits into the bolt shaft part 18 to fix the cover 26 on the side wall panel 10.

In this state, the cutout hole 24 of the heat insulating material 20 and the bolt shaft portion 18 and nut 16 therein are completely covered, thereby improving the appearance of the storage tank. At the same time, since the side wall panel 10 is cut off from direct contact with the outside air, the heat retention of the storage tank is also improved. Furthermore, in this example, since the heat insulating material 36 is housed inside the cover 26, the effect of improving heat retention is also great.

Further, since the flange 30 is brought into close contact with the surface of the heat insulating material 20 via the ring-shaped urethane foam 30, rainwater is prevented from entering into the cutout hole 24 and subsequently into the inside of the heat insulating material 20.

The flange 30 and urethane foam 32 in this example also serve to prevent the bolt cover 26 from wobbling. In addition, the flange 30 and the urethane foam 32 can reliably contact the surface of the heat insulating material 20 even if the surface of the heat insulating material 20 is slightly uneven or sloped. Regardless, it serves to provide a good seal between the inside of the notch hole 24 and the outside.

The fastener cover of the present invention can be configured in various other forms. For example, as shown in FIG. 5, the opening at the tip of the fixing part 40 is tapered, or as shown in FIG. 6, a slotted groove 42 is provided to make it easier to fit the fixing part 44 into the bolt shaft. It is also possible. Further, as shown in FIG. 7, a large number of grooves 48 can be formed on the inner surface of the fixing part 46 to increase the engagement force with the bolt shaft, and the flange can be formed using the polyurethane foam 3 described above.
It is also possible to directly contact the surface of the heat insulating material 20 without using the heat insulating material 20. Further, as shown in FIG. 7, the flange 50 is inclined toward the surface of the heat insulating material 20, and its tip is made thinner to form the heat insulating material 20.
In order to improve the adhesion with the surface, as shown in FIG. 8, a frictional engagement part 54 is formed on the outer peripheral surface of the opening side end of the cover main body 52 to keep this part warm under a constant frictional force. It is also possible to engage the inner peripheral surface of the notch hole 24 of the material 20.

In addition, as shown in FIG. 9, while elastically deforming the heat insulating material 20 and the flange 54, the open end of the cover is pushed into the notch hole 24, and the flange 54 is connected to the heat insulating material 20 and the resin coating layer 22. It is also possible to engage the gap between them.

In addition, it is also possible to adhere the urethane foam to the flange of the fastener cover, and the present invention can be modified and modified in various ways based on the knowledge of those skilled in the art without departing from the spirit of the invention. It is possible.

(Effects of the invention) As detailed above, according to the invention, the notch holes in the heat insulating material are almost completely covered along with the internal fasteners, improving the appearance and heat retention of the storage tank, as well as preventing rainwater, etc. Various effects are produced, such as preventing intrusion into the inside of the heat insulating material and reducing the wobbling of the fastener cover itself.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a bolt cover according to an embodiment of the present invention, showing a bolt and its surrounding parts, and FIG. 2 is a perspective view of a main part of an assembly type storage tank. 3 is an enlarged sectional view of the main part of FIG. 2, and FIG. 4 is a perspective view of the bolt cover in FIG. 1. 5, 6, 7, and 8 are a sectional view, a side view, a sectional view, and a sectional view, respectively, of bolt covers according to other embodiments of the present invention. FIG. 9 is a sectional view of a main part showing a cover according to still another embodiment of the present invention, together with a bolted part and a peripheral part of a storage tank. Figures 10 to 1
FIG. 3 is a sectional view of essential parts showing an example of a conventional fastener cover. 10... Side wall panel, 14... Bolt, 15...
...Bolt hole, 16...Nut, 20...Insulating material,
24...Notch hole, 26...Bolt cover, 28...
...Cover body, 30, 50...Flange, 32...
...Urethane foam.

Claims (1)

[Scope of Claim for Utility Model Registration] In a heat-retaining assembly type storage tank in which a plurality of side wall panels are joined together to form a side wall and the outer surfaces of the side wall panels are covered with a heat insulating material, a fastener is inserted into the side wall panel. Covers the hole in the heat insulating material that is formed by cutting out the peripheral part around the axis of the fastener insertion hole, which is formed when providing the general hole, and the fastener exposed from this hole. The cover includes a cylindrical cover body with a bottom at one end, and a cover formed on the outer peripheral surface of the cover body at a position a certain distance apart along the axis from one end on the opening side of the cover body. flange, the opening side of the cover body is fitted into the notch hole of the heat insulating material, and the flange is brought into direct or indirect contact with the periphery of the notch hole. Fastener cover.