JPH08145032A - Cap for bolt - Google Patents

Abstract

PURPOSE: To provide a bolt cap which is adpated to be attached to a projecting head of a bolt by an thread-engaging means, which is incorporated with a removable adapter, and which can be used for any one of two or three kinds of bolts having different sizes by selecting a kind of the adapter thereby it is possible to reduce a number of several kinds of articles in order to reduce the cost. CONSTITUTION: A bolt cap is composed of a cylindrical body 1 having an opened lower end, and an upper end formed thereon with an upper wall 3 formed in its center part with a thread hole 2 in which a bolt is adapted to be threadedly engaged, an adapter 5 adapted to be removably fitted in the thread hole 2 in the upper wall 3 so as to inhibit free rotation thereof, and having a thread hole 4 whose diameter is smaller than that of the thread hole 2, and a cover 7 removably screwed onto an outer thread part 6 formed on the outer peripheral part of the body 1. Further, a space for storing therein a fastening nut adapted to be screwed onto the bolt, is formed in the inside of the body 1 in its entirety or at least in a part thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap for covering an outer protruding portion of a bolt together with a tightening nut.
For example, the lower end part is embedded in concrete, the upper end part protrudes from the concrete surface, an object to be fixed is fixed to this protruding part via a nut, and then the nut is used together with the nut to cover and protect the remaining protruding part of the anchor bolt. It is about the cap.

[0002]

2. Description of the Related Art Conventionally, when an object to be mounted, such as a lightning rod, a lightning arrester, and a conductor member connected thereto, is fixed to a concrete surface of a building, an L-shaped lower end portion of an anchor bolt is embedded in concrete. A mounting bracket is attached to a portion of the anchor bolt protruding from the concrete surface by a fastening nut. And often,
At present, the remaining protruding portion of the anchor bolt is left as it is together with the tightening nut.

[0003]

The protruding head of the above-mentioned bolt is often exposed to the wind and rain during long-term use and rusts in many cases, and there is a danger of being injured when directly touched. Nor is it good. Therefore, it is preferable that the protruding head of the bolt be concealed and protected by an appropriate means. However, when this protection means is attached by screwing means using the protruding part of the bolt, since the bolt to be protected has a different size depending on the place of use, a cap having a screw hole suitable for each bolt must be arranged. In addition, there are problems that the number of varieties increases, the management is troublesome, and the cost is high.

[0004] Therefore, the main object of the present invention is to attach to the protruding portion of the bolt by screwing means,
A detachable adapter is attached to the cap, and by selecting this adapter, it is possible to provide a cap that can be used for two or three types of bolts with different sizes, thereby eliminating the diversification of products and reducing costs. The goal is to achieve reduction.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is, in the bolt cap according to the present invention, a cylindrical main body 1 having an upper wall 3 having an opening at a lower end and an upper end having a screw hole 2 for screwing a bolt in the center, and the upper wall 3 An adapter 5 which is detachably fitted in the screw hole 2 in a state where free rotation is prevented and has a screw hole 4 for screwing a bolt having a smaller diameter than the screw hole at the center, and an outer peripheral surface of the main body 1. A cover 7 detachably screwed onto the formed external screw 6, and a space 9 in which the whole or at least a lower part of the main body 1 can accommodate a tightening nut N screwed into the bolt.
Is secured.

[0006]

In the bolt cap constructed as described above, when the bolt B to be used corresponds to the screw hole 4 of the adapter, as shown in FIG. The nut N and the bolt B are screwed together and attached, and then the lid 7 is screwed to the main body 1.
This allows the cap to be securely and firmly attached to the bolt. When the bolt B corresponds to the screw hole 2 of the main body 1, the adapter 5 is removed, the bolt B is screwed into the screw hole 2 of the main body 1, and the cover 7 is formed by the same means as described above.
To the main body 1. As a result, one cap can be used to protect the heads of two types of bolts B having different diameters and to make the appearance beautiful.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of a bolt cap according to the present invention will be described below based on an embodiment shown in the drawings. In the following embodiments, the bolt will be described as an anchor bolt. In the figure, reference numeral 1 denotes a cylindrical main body, which is provided with an upper wall 3 having an opening at a lower end and a through screw hole 2 for screwing an anchor bolt at the upper end. An adapter 5 having a through screw hole 4 for screwing an anchor bolt having a smaller diameter than the screw hole at the center is detachably fitted to the screw hole 2 of the upper wall 3 in a state where free rotation is prevented. I have. In this embodiment, the adapter 5 includes a tubular portion 5a inserted into the upper wall 3 and an oval-shaped flange portion 5b formed at the upper end of the tubular portion. The anchor 5 is attached to the inner surface of the tubular portion 5a. Screw holes 4 for screwing in bolts
Are formed. An oval recess 3a is formed in the upper surface of the upper wall 3 of the main body 1 so that the flange 5b of the adapter 5 can be fitted tightly.

In this embodiment, the screw hole 2 formed in the upper wall 3 of the main body is JIS standard M16, and the screw hole 4 of the adapter 5 is formed as M12. However, the combination of the screw holes 2 and 4 is not necessarily limited to the above setting, and various combinations such as a combination of M24 and M20 or M20 and M16 are possible.

Reference numeral 7 denotes a lid for detachably screwing onto an external screw 6 formed on the outer peripheral surface of the upper portion of the main body 1 to cover the upper portion of the main body. Are provided. At least an inner lower portion of the main body 1 is provided with a space 9 for accommodating the tightening nut N screwed into the anchor bolt B. The main body 1, the adapter 5 and the lid 7 are made of a synthetic resin material.

In the anchor bolt cap formed as described above, for example, a non-mounting object D is fitted to a protruding portion of the anchor bolt B having a lower part embedded in concrete C, and the anchor bolt is tightened with a nut N. It is used to cover the protruding portion of B together with the nut B. At this time, when the anchor bolt B has a size of M12, as shown in FIG. 2, the main body 1 is screwed together with the nut N to the anchor bolt B while the adapter 5 is attached, and then the lid 7 is attached. To the main body 1. This allows the cap to be securely and firmly attached to the anchor bolt. In addition, anchor bolt B is M16
In the case of, the adapter 5 is removed and the screw hole 2 of the main body 1 is removed.
The cover 7 is attached to the main body 1 by the same means as above.

The adapter 5 can be easily removed by pushing it out from below the main body with a finger or by inserting a tool or the like and pushing it out. For example, as shown in FIG. If a small notch 5c into which the tip can be inserted is provided, it can be taken out upward by a driver.

A cover 7 screwed to the external screw 6 of the main body 1
The inner screw 10 may be formed all around the inner surface as shown in FIGS. 4 and 5, but as shown in FIG. At this time, the work of pulling out the screw mold can be facilitated and the molding time can be shortened. In the above embodiment, the bolt for attaching the cap is described as an anchor bolt, but it is needless to say that the cap is not limited to the anchor bolt.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments. In the same manner, another small adapter similar to the adapter 5 is fitted in this small recess that can be prevented from rotating, similar to the oval-shaped recess 3a formed on the upper surface of the main body 1. The present invention has the above-mentioned components, such as being able to correspond to various kinds of bolts, and achieves the object of the present invention, and can be appropriately modified and implemented within the range of achieving the following effects.

[0014]

As apparent from the above description of the embodiment, the bolt cap of the present invention can be securely and firmly attached to the protruding portion of the tightening bolt by the screwing means while being attached to and detached from the main body. By freely selecting the attached adapter, it can be used for bolts of different sizes, thereby eliminating the diversification of products and reducing costs. Etc., to prevent the promotion of rusting,
It has an excellent effect that the head of the bolt can be made beautiful.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a bolt cap according to the present invention.

FIG. 2 is a sectional view showing one usage example.

FIG. 3 is a cross-sectional view showing another usage example.

FIG. 4 is a central longitudinal sectional view of a lid.

FIG. 5 is a bottom view of the lid.

FIG. 6 is a bottom view showing another embodiment of the lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Main body screw hole 3 Main body upper wall 4 Adapter screw hole 5 Adapter 6 Main body outer screw 7 Lid 9 Nut storage space N Nut B Bolt

Claims (1)

[Claims] 1. A tubular main body having an upper end having an opening at a lower end and an upper end having a screw hole for screwing a bolt at the upper end, and a state in which free rotation is prevented by the screw hole in the upper wall. An adapter which is detachably fitted and has a screw hole for screwing a bolt having a diameter smaller than that of the screw hole at the center, and a lid detachably screwed to an external screw formed on the outer peripheral surface of the main body. A cap for a bolt, wherein a space for accommodating a tightening nut screwed into the bolt is secured in the whole or at least a lower part of the main body.