JP2021073416A - Decorative cover for bolt - Google Patents

Abstract

To provide a decorative cover for a bolt which has a superior working property .SOLUTION: This invention relates to a decorative cover for a bolt that comprises a bolt open hole 2 through which a bolt B passes, and at least one claw part 3 protruded from each of one side peripheral wall 21 and the other side peripheral wall 22 of the bolt open hole 2, while taking as a reference a virtual line passing the center of the bolt open hole 2 in plan view or bottom view. In the decorative cover, one set is constituted by one claw part 3 placed at one side peripheral wall 21 and one claw part 3 placed at the other side peripheral wall 22, the claw part 3 placed at the one side peripheral wall 21 and the claw part 3 placed at the other side peripheral wall 22 belonging to the one set are formed at different positions in a passing direction at the bolt open hole 2, a difference at the positions of the claw part 3 of the one side peripheral wall 21 and the claw part 3 of the other side peripheral wall 22 belonging to one set corresponds to a pitch of thread at the bolt B for an angle in a peripheral direction between the claw part 3 of the one side peripheral wall 21 and the claw part 3 of the other side peripheral wall 22.SELECTED DRAWING: Figure 4

Description

The present invention relates to a decorative cover for bolts attached to a bolt protruding from an installation surface.

Equipment such as piping is placed away from the installation surface by using bolts that protrude from the installation surface, for example, hanging bolts that are embedded in the ceiling of a building and installed so as to protrude from the ceiling surface. There is. At this time, in order to cover the part where the bolt protrudes on the installation surface (specifically, the bolt embedding hole on the installation surface and its surroundings), a decorative cover for bolts (hereinafter also referred to as "decorative cover") covers this part. Notation) may be attached. As an example of this decorative cover, there is a "decorative cap for a bolt suspension embedding tool" according to the invention described in Patent Document 1.

The decorative cover according to the invention described in Patent Document 1 is made of resin, for example, and is formed in a disk shape having a bolt through hole in the center in a plan view or a bottom view. Then, a plurality of claws are formed on the peripheral wall of the bolt through hole to hold the decorative cover so as not to shift by being hooked on the thread of the bolt. As shown in FIG. 7, in the decorative cover 100 of the invention described in Patent Document 1, a plurality of claw portions 102 ... 102 are arranged in a row (same in the height direction) in the bolt through hole 101 in the circumferential direction. Since threads (female threads) are not continuously formed on the peripheral wall of the bolt through hole 101 like a nut, but a plurality of claws 102 ... 102 are intermittently formed, the decorative cover 100 is bolted. The decorative cover 100 can be easily attached to the bolt simply by arranging it around (not shown) and pushing it toward the installation surface along the axis of the bolt.

Here, since the screw thread of the bolt is formed so as to orbit diagonally with respect to the axis of the bolt, simply pushing the decorative cover 100 along the axis of the bolt toward the installation surface as described above is sufficient. Since the plurality of claw portions 102 ... 102 are along the thread, the decorative cover 100 is positioned obliquely with respect to the axis of the bolt. For this reason, a part of the decorative cover may float from the installation surface, resulting in poor appearance. In such a case, the operator rotates the decorative cover 100 so as to screw it along the screw thread so that the floating portion of the decorative cover 100 is brought into close contact with the installation surface to correct the appearance. .. As described above, the conventional decorative cover may not be completely attached in one step. Also, if the installation surface is a ceiling surface, you will be forced to work in a high place. Therefore, the workability is not good, and there is room for improvement.

Jikkai Sho 51-71021

Therefore, an object of the present invention is to provide a decorative cover for bolts having good workability.

The present invention is a decorative cover for a bolt attached to a bolt protruding from an installation surface, based on a bolt through hole through which the bolt penetrates at the time of attachment and a virtual line passing through the center of the bolt through hole in a plan view or a bottom view. It is provided with at least one claw portion protruding from one side peripheral wall and the other side peripheral wall of the bolt through hole, and one claw portion on the one side peripheral wall and one on the other side peripheral wall. A set is formed by the claws of the above, and the claws on the one side peripheral wall and the claws on the other side peripheral wall belonging to the one set are formed at different positions in the direction through which the bolt through hole penetrates. The difference in position between the claw portion of the one side peripheral wall and the claw portion of the other side peripheral wall belonging to the one set is between the claw portion of the one side peripheral wall and the claw portion of the other side peripheral wall. It is a decorative cover for bolts corresponding to the pitch of the threads in the bolt for the angle in the circumferential direction.

According to this configuration, each claw portion belonging to the one set can be arranged according to the pitch of the screw thread, so that the decorative cover can be arranged without deviation with respect to the bolt simply by pushing the decorative cover toward the installation surface.

According to the present invention, the decorative cover can be arranged without slippage with respect to the bolt simply by pushing the decorative cover toward the installation surface. Therefore, it is possible to provide a decorative cover for bolts having good workability.

A decorative cover for bolts according to an embodiment of the present invention is shown, (A) is a plan view, (B) is a right side view, and (C) is a bottom view. The half-split body constituting the decorative cover for bolts is shown, (A) is a front view, (B) is a bottom view, (C) is a rear view, (D) is a side view, and (E) is an I-I arrow. It is a cross-sectional view. The circumference of the bolt through hole in the half-split body is shown, (A) is an enlarged bottom view of a main part of FIG. 2 (B), and (B) is an enlarged cross-sectional view taken along the line II-II in FIG. 2 (B). The decorative cover for bolts is shown, (A) is a bottom view, and (B) is a sectional view taken along line III-III in (A). It is an enlarged cross-sectional view of a main part which shows the state which attached the decorative cover for a bolt to a bolt, (A) shows this embodiment, and (B) shows a comparative example. It is a top view which shows the decorative cover for a bolt which concerns on other embodiment of this invention. It is a vertical cross-sectional view which shows an example of the conventional decorative cover for a bolt.

Next, the decorative cover for bolts according to the present invention will be described by taking up one embodiment. Hereinafter, an example (see FIG. 5A) in which the decorative cover 1 is attached to the hanging bolt B embedded in the ceiling of the building and installed so as to protrude from the ceiling surface S as the installation surface will be described. ..

The decorative cover 1 of the present embodiment is a combination of two halves 1h and 1h having the same shape shown in FIGS. 2A to 2E, and has a disk shape shown in FIGS. 1A to 1C. Used in form. The half-split body 1h is a resin molded product. In the present embodiment, since the decorative cover 1 can be formed by combining two half-split bodies 1h and 1h having the same shape, only one type of molding mold is prepared when performing resin molding of the half-split body 1h, so that the manufacturing cost is high. Can be reduced. In addition, since it is not necessary to handle half-split bodies having different shapes, management and distribution costs can be reduced. Furthermore, even at the installation site, work to identify the combination of the half-split body 1h picked up by the worker, for example, work to distinguish whether the half-split body 1h picked up by the worker is "for right" or "for left". Work efficiency is good because there is no need for.

As shown in FIG. 2B, the half-split body 1h has a substantially semicircular shape in bottom view (and plan view), and has a tip from a joint edge 1e, which is an edge corresponding to a straight portion of the semicircle. The engaging portion 11 in which the portion 111 has a claw shape is projected. Further, an engaged portion 12 that can be engaged with the engaging portion 11 is formed inside the half-split body 1h. The claw-shaped tip portion 111 of the engaging portion 11 and the engaged portion 12 are provided in a rotationally symmetric positional relationship.

By locating the two half-split bodies 1h and 1h so as to sandwich the hanging bolt B, and aligning the joint end edges 1e of each half-split body 1h to engage the engaging portion 11 and the engaged portion 12. , The decorative cover 1 can be attached to the hanging bolt B.

The half-split body 1h further includes a support frame 13, a mating plate 14, a reinforcing rib 15, and a cutting auxiliary groove 16.

As shown in FIG. 1C, the support frame 13 is supported by accommodating the base 112 of the engaging portion 11 included in the other half body 1h in one half body 1h constituting the decorative cover 1. It is a frame-shaped part to be used. The support frame 13 formed in this way prevents the two halves 1h and 1h from being displaced along the joint end edge 1e while supporting the base 112 of the engaging portion 11.

The mating plate 14 is a plate-like portion protruding from the joint edge 1e around the support frame 13. When the two halves 1h and 1h are combined, the laminated plate 14 is located so as to overlap the inner side of the joint end edge 1e as shown in FIG. 1 (C), and the two halves are formed. Prevents a gap from being formed between 1h and 1h. Further, the mating plate 14 also functions as a reinforcement against the bending stress of the joint end edge 1e by being located inward of the joint end edge 1e in the half-split body 1h which is the counterparty of the combination. Therefore, the laminated plate 14 can stably hold the shape of the decorative cover 1 formed by combining the two halves 1h and 1h.

As shown in FIGS. 2B and 2E, the reinforcing rib 15 is a plate-shaped rib that is provided parallel to the joint end edge 1e and protrudes from the inner surface on the bottom surface side of the half-split body 1h. As shown in FIGS. 2B and 2E, the cutting auxiliary groove 16 is a groove formed on the inner surface on the bottom surface side along the reinforcing rib 15. The cutting auxiliary groove 16 is a part of the decorative cover 1 when, for example, the decorative cover 1 is arranged in a portion of the ceiling surface S close to the wall surface, or when an obstacle exists at the planned installation position of the decorative cover 1. When it is necessary to cut, it can be cut along the cutting auxiliary groove 16 by a cutting means such as a saw blade.

As shown in FIG. 1B, the decorative cover 1 formed by combining the two halves 1h and 1h has a disk shape in which the peripheral edge portion is curved so as to warp toward the back side. It is formed. The decorative cover 1 is provided with a bolt through hole 2 through which the suspension bolt B penetrates at the center in a plan view or a bottom view when the decorative cover 1 is attached to the suspension bolt B as shown in FIG. 5 (A). As shown in FIGS. 3A and 3B, a plurality of bolt through holes 2 project in the radial direction from the peripheral wall (in this embodiment, one half-split body 1h has six pieces, and the entire decorative cover 1 has one. 12) claws 3 ... 3 are formed intermittently. These plurality of claw portions 3 ... 3 are arranged alternately in high and low directions in the circumferential direction. Each of the plurality of claws 3 ... 3 extends obliquely downward from the peripheral wall when attached to the hanging bolt B. Further, as shown in FIG. 1C, the peripheral edge of the decorative cover 1 is provided with a contact portion 4 that comes into contact with the ceiling surface S when attached to the hanging bolt B.

In this way, the plurality of claw portions 3 ... 3 are imaginary lines CL (lines that bisect the bolt through holes 2) that appear in the plan view or the bottom view and pass through the center of the bolt through holes 2 shown in FIG. 1 (A). ) As a reference, at least one (six in this embodiment) is formed so as to protrude from each of the one-side peripheral wall 21 and the other-side peripheral wall 22 which are opposed to each other in the bolt through hole 2. The one-side peripheral wall 21 belongs to one of the two half-split bodies 1h and 1h to be combined, and the other side peripheral wall 22 belongs to the other. However, in the present embodiment, the virtual line CL is a line that coincides with the joint edge 1e in the half-split body 1h, but is not limited to this.

A set is composed of one claw portion 3 on the one side peripheral wall 21 and one claw portion 3 on the other side peripheral wall 22. In the present embodiment, the relationship is substantially opposed with respect to the center of the bolt through hole 2, and more specifically, the relationship in which the angle θ with respect to the center of the bolt through hole 2 is separated by 150 ° as shown in FIG. 4 (A). The two claws 3 and 3 in the above form the above-mentioned one set (the set indicated by the reference numerals 3P in FIGS. 4A and 4B), and the decorative cover 1 is a set of these two claws 3 and 3. Are formed in 6 sets.

One claw portion 3 on the one side peripheral wall 21 and one claw portion 3 on the other side peripheral wall 22 belonging to the one set are at different positions in the penetrating direction of the bolt through hole 2, that is, one is higher. At the position, the other is formed at a lower position. Hereinafter, the claw portion 3 formed at a high position is referred to as a high claw portion 3H, and the claw portion 3 formed at a low position is referred to as a low claw portion 3L. In this embodiment, all 6 sets satisfy this requirement, but functionally, at least 1 set may satisfy this requirement.

The difference in position (height difference) between the high claw portion 3H and the low claw portion 3L belonging to the one set is the circumferential angle θ between the high claw portion 3H and the low claw portion 3L (150 in the present embodiment). It corresponds to the pitch of the thread in the hanging bolt B for °). However, the decorative cover 1 of the present embodiment is designed so that the height difference in the one set is close to 1/2 pitch of the screw thread (angle in the circumferential direction is 180 °) for the following reasons. ..

Strictly speaking, the two claw portions 3, 3 which are 180 ° apart from each other at an angle with respect to the center of the bolt through hole 2 coincide with the 1/2 pitch of the screw thread. Is ideal, but then, when forming a plurality of claw portions 3 ... 3 which are 6 sets as in the present embodiment, two halves 1h and 1h having the same shape are formed. The decorative cover 1 cannot be formed by combining them (it cannot be dealt with unless a so-called "selfishness" is provided in the half-split body 1h). Therefore, in the present embodiment, the two claw portions 3, 3 which are separated by 150 ° form the above-mentioned one set. Therefore, the phrase "equivalent" (the same applies to the phrase "equivalent" specified in the claims) is a concept that allows a deviation (a deviation of 30 ° in the present embodiment). Further, since the decorative cover 1 of the present embodiment is made of resin, the displacement is absorbed by the elastic deformation of the claw portion 3, so that no particular problem occurs. It should be noted that the height difference between the high claw portion 3H and the low claw portion 3L belonging to the above-mentioned one set is the pitch of the threads in the hanging bolt B by the circumferential angle between the high claw portion 3H and the low claw portion 3L. Of course, it is possible to design the same as.

As described above, in the decorative cover 1 of the present embodiment, the claw portions 3 belonging to one set can be arranged so as to roughly match the pitch of the screw threads. Specifically, the tip portion 31 of each claw portion 3 belonging to one set can be brought into contact with the ceiling surface facing surface BS of the threads. At this time, the elastic force may extend from each claw portion 3 to the ceiling surface facing surface BS due to the bending of each claw portion 3. Since the tip 31 of each claw 3 and the screw thread come into contact with each other at least at two locations substantially facing each other with respect to the center of the hanging bolt B, simply pushing the decorative cover 1 toward the ceiling surface S is shown in FIG. As shown in (A), the decorative cover 1 can be arranged without deviation to the extent that the conventional floating does not occur.

Here, as a comparative example, FIG. 5B shows a case where a decorative cover X1 in which a plurality of claw portions X3 ... X3 are arranged in a row in the circumferential direction is attached to the hanging bolt B as in the conventional case. In this comparative example, as is clear from the illustrated contents, the claw portion X3 on the left side of the drawing is in contact with the ceiling surface facing surface BS of the threads, but the claw portion X3 on the right side of the drawing is from the ceiling surface facing surface BS. It's floating. Since the decorative cover X1 may fall by this amount of floating, a part of the decorative cover X1 may float from the ceiling surface S as described above, resulting in poor appearance. On the other hand, since the decorative cover 1 of the present embodiment can be in the state shown in FIG. 5 (A), it is possible to suppress the deterioration of the appearance as in the comparative example.

Further, in the present embodiment, a plurality of sets (specifically, 6 sets) of the high claw portion 3H and the low claw portion 3L are provided. Therefore, since the plurality of claw portions 3 ... 3 belonging to any of the sets can be matched with the threads of the hanging bolt B, they can be easily matched with the threads, and the decorative cover 1 can be easily attached.

Further, in the present embodiment, the high claw portion 3H and the low claw portion 3L are alternately arranged in the circumferential direction. Therefore, since the position of the claw portion 3 can be set only by two patterns (high claw portion 3H and low claw portion 3L), when the decorative cover 1 is a molded product, a molding mold such as a mold is formed (specifically). The design and manufacture of the portion forming the claw portion 3 in the molding die) is simple.

In addition, in the decorative cover 1 in which two half-split bodies 1h and 1h having the same shape are combined, all the high claw portions 3H and the low claw portions 3L are arranged alternately in the circumferential direction. It is necessary to form an even number of claw portions 3 ... 3 in one half-split body 1h. With this configuration, when the claw portion 3 on one end side in the circumferential direction of the peripheral walls 21 and 22 of the portion to be the bolt through hole 2 is the high claw portion 3H, the claw portion 3 on the other end side in the circumferential direction is the low claw portion. Since it is 3L, the claw portion 3 at the circumferential end of one half-split body 1h and the claw portion 3 at the circumferential end of the other half-split body 1h adjacent to the claw 3 are always "high-". It becomes a "low" relationship. Therefore, the relationship in which all the high claw portions 3H and the low claw portions 3L are alternately arranged in the circumferential direction is realized.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

For example, in the above-described embodiment, the decorative cover 1 is a hanging bolt B installed on the ceiling surface S, but it may be a bolt installed on a vertical wall surface, for example, and the specific form of the installation surface and the types of bolts are limited. Not done. Further, the bolt attachment target is not limited to the building, and can be various objects such as the surface of a mechanical device. Further, the thread forming range of the bolt may be the entire range (all screw bolts), or may be only the portion of the axial direction protruding from the installation surface, for example.

Further, in the above-described embodiment, the decorative cover 1 is a resin molded product, but the present invention is not limited to this, and for example, it can be formed by punching and bending a metal plate.

Further, in the above-described embodiment, the decorative cover 1 is formed by combining two halves 1h and 1h, but one decorative cover 1 without division may be used. In this case, the decorative cover 1 is formed of a highly elastic resin such as rubber, and a slit that reaches the bolt through hole 2 is formed from the peripheral edge, so that the side of the bolt such as the hanging bolt B is formed through this slit. It is also possible to insert the decorative cover 1 from the side so that it can be bolted.

The number of claws 3 included in the decorative cover 1 is 12 in the above embodiment (6 in one half-split body), but the number is not limited to this, and is shown in FIG. 6, for example. As shown above, the number can be 10 (5 for one half-split body) or other numbers.

Further, in the above-described embodiment, the angles θ of the two claw portions 3 and 3 constituting one set with respect to the center of the bolt through hole 2 are separated by 150 °. The angle θ is not limited to this, and can be set at other angles.

Further, in the above-described embodiment, the claw portion 3 is of two types, a high claw portion 3H and a low claw portion 3L. That is, there were two types of formation positions of the plurality of claw portions 3 ... 3 in the bolt through hole 2. However, it is also possible to form three or more types of the plurality of claw portions 3 ... 3. Further, the claw portion 3 can be formed by sequentially changing the position along a spiral locus that coincides with the thread of a bolt such as a hanging bolt B.

Further, a plurality of sets including one claw portion on the one side peripheral wall and one claw portion on the other side peripheral wall may be provided.

According to this configuration, by providing a plurality of sets of claws, the claws belonging to any of the sets can be matched with the threads of the bolts, so that the decorative cover can be easily attached.

Further, the claws adjacent to each other in the circumferential direction may be arranged alternately at one position and the other position in the direction in which the bolt through hole penetrates.

According to this configuration, the positions of the claws can be set in two patterns, so that it is easy to form a molding mold when the decorative cover is a molded product.

Further, two halves having the same shape can be combined to form a decorative cover.

According to this configuration, when the decorative cover is a molded product, the manufacturing cost can be reduced because only one type of molding mold is prepared when molding the half-split body. In addition, management and distribution costs can be reduced. Further, even at the installation site, the work efficiency is good because the worker does not need to identify the combination of the half-split bodies.

1 Cosmetic cover for bolts 1h Half-split body 1e Half-split body joint end edge 11 Engagement part 12 Engagement part 13 Support frame 14 Laminating plate 15 Reinforcing rib 16 Cutting auxiliary groove 2 Bolt through hole 21 One side of bolt through hole Peripheral wall 22 Peripheral wall on the other side of the bolt through hole 3 Claw part 3H High claw part 3L Low claw part 3P Claw part assembly 31 Claw part tip 4 Contact part B bolt, hanging bolt BS Ceiling surface facing surface of hanging bolt CL Virtual Line θ Angle formed by a set of claws S Installation surface, ceiling surface

Claims (1)

In the decorative cover for bolts that is attached to the bolts that protrude from the installation surface
A bolt through hole through which the bolt penetrates during installation,
It is provided with at least one claw portion protruding from one side peripheral wall and the other side peripheral wall of the bolt through hole with reference to a virtual line passing through the center of the bolt through hole in a plan view or a bottom view.
A set is composed of one claw portion on the one side peripheral wall and one claw portion on the other side peripheral wall.
The claw portion on the one side peripheral wall and the claw portion on the other side peripheral wall belonging to the one set are formed at different positions in the direction through which the bolt through hole penetrates.
The difference in position between the claw portion of the one side peripheral wall and the claw portion of the other side peripheral wall belonging to the one set is the circumferential direction between the claw portion of the one side peripheral wall and the claw portion of the other side peripheral wall. A decorative cover for bolts, which corresponds to the pitch of threads in the bolt for an angle.

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