JP2021134856A - Connector - Google Patents

Abstract

To provide a connector which can surely connect a tubular member with a simple configuration.SOLUTION: A connector 10 used for connecting two tubular members 34a, 34b, includes: a shaft part 12 having a male screw 14; a first holding part 18a in which one end of the shaft part 12 is screwed and attached to an end of the one tubular member 34a; and a second holding part 18b in which the other end of the shaft part 12 is screwed and attached to an end of the other tubular member 34b. Each of the first holding part 18a and the second holding part 18b includes: an annular part 20; and a plurality of holding pieces 22 axially extending from one main face of the annular part 20, spaced apart in a peripheral direction, and fitted into the tubular members 34a, 34b. Each of the holding pieces 22 includes a groove part 24 on an inner face in a radial direction and screwed with the male screw 14 of the shaft part 12, and configured to be opened outward in a radial direction according to the screw-in of the shaft part 12 so as to press an inner peripheral face of the tubular members 34a, 34b.SELECTED DRAWING: Figure 1

Description

The present invention relates to a connector, and more specifically to a connector used to connect two tubular members.

As an example of this kind of prior art, Patent Document 1 discloses a connecting structure of a tubular body. The connecting structure of this pipe body is a structure in which two pipe bodies are connected to each other in a state where the opposite opening ends are butted against each other, and includes a shaft body made of bolts. The first nut is screwed into the bolt head side of this bolt, a rubber short tubular first elastic member is interposed between the first nut and the bolt head, and the second nut is placed on the tip side of the bolt. Is screwed, and a rubber short tubular second elastic member is interposed between the second nut and the first elastic member via a separator member. Then, by screwing the first nut toward the head side of the bolt, the first elastic member is expanded in the radial direction and is elastically contacted with one of the peripheral surfaces inside the tube. On the other hand, by rotating the other tubular body and rotating the second elastic member whose outer peripheral surface is inscribed on the inner peripheral surface of the tubular body, the second nut is rotated and screwed together, and the second The elastic member is expanded in the radial direction and is brought into contact with the peripheral surface of the other tube. As a result, the shaft body is incorporated between the pipe bodies in both pipe bodies, and the elastic members attached to both ends of the shaft body are expanded and elastically contacted with the inner peripheral surface of the pipe body. Both pipe bodies are integrally connected via a shaft body by the crimping force of the elastic member.

Japanese Unexamined Patent Publication No. 2002-147420

As described above, the connecting structure of Patent Document 1 requires many parts and has a complicated structure. Further, since the first elastic member and the second elastic member that are elastically contacted with the inner peripheral surface of the tubular body are made of rubber, the crimping force of these elastic members weakens due to aged deterioration or deterioration, and the two tubular bodies are connected. May weaken.

Therefore, a main object of the present invention is to provide a connector capable of reliably connecting tubular members with a simple structure.

A connecting tool for connecting two tubular members in order to achieve the above-mentioned object, the shaft portion having a male screw and one end portion of the shaft portion are screwed and attached to the end portion of one tubular member. A first holding portion to be formed and a second holding portion into which the other end of the shaft portion is screwed and attached to the end of the other tubular member are provided, and the first holding portion and the second holding portion are annular portions, respectively. And a plurality of holding pieces extending axially from one main surface of the annular portion and provided at intervals in the circumferential direction and fitted into the tubular member, each holding piece having a shaft portion on an inner surface in the radial direction. Provided is a connector having a groove portion to be screwed with a male screw, which is formed to open radially outward in response to screwing of the shaft portion and to press the inner peripheral surface of the tubular member.

In the present invention, a bolt-shaped shaft portion is screwed into the first holding portion from one end side in a state where a plurality of holding pieces of the first holding portion are fitted into the end portion of one tubular member. Then, the male screw on the one end side of the shaft portion is screwed into the groove portion of each holding piece of the first holding portion, and as it advances, each holding piece is pressed outward in the radial direction and expanded. At this time, in each holding piece of the first holding portion, the tip portion side opens outward in the radial direction with the base portion on the annular portion side as a fulcrum. As a result, each holding piece of the first holding portion presses the inner peripheral surface of one of the tubular members and is strongly pressure-bonded to the inner peripheral surface. Then, with the plurality of holding pieces of the second holding portion fitted into the end of the other tubular member, the shaft portion attached to the one tubular member is screwed into the second holding portion from the other end side. To go. Then, the male screw on the other end side of the shaft portion is screwed into the groove portion of each holding piece of the second holding portion, and as it advances, each holding piece is pressed outward in the radial direction and expanded. At this time, in each holding piece of the second holding portion, the tip portion side opens outward in the radial direction with the base portion on the annular portion side as a fulcrum. Then, the shaft portion is screwed into the second holding portion until the annular portion of the first holding portion and the annular portion of the second holding portion come into contact with each other. As a result, each holding piece of the second holding portion presses the inner peripheral surface of the other tubular member and is strongly pressure-bonded to the inner peripheral surface. In this way, the two tubular members can be reliably connected by a connecting tool having a simple structure.

Preferably, it further includes a stopper provided on the outer periphery of the shaft portion so as not to rotate with respect to the shaft portion, and each holding piece has a locking portion for locking the stopper at the end portion on the annular portion side. In this case, the shaft portion can be easily rotated by rotating the stopper. Further, by simply rotating the stopper until it comes into contact with the locking portion, the degree of screwing of the shaft portion into the first holding portion and the second holding portion, that is, the position of the shaft portion can be appropriately set, and the connecting work can be smoothly performed. Become.

Further, preferably, the accommodating portion accommodating the stopper is formed by the first holding portion and the second holding portion in a state where the first holding portion and the second holding portion are assembled to the shaft portion until the annular portions come into contact with each other. NS. In this case, in order to connect the two tubular members, the first holding portion attached to one tubular member and the second holding portion attached to the other tubular member are brought into contact with each other until the annular portions come into contact with each other. When assembled to the shaft portion, the stopper is accommodated in the accommodating portion and is not exposed to the outside from between the two annular portions. Therefore, it is possible to prevent fine dust and dirt from entering the accommodating portion from between the two annular portions, and it is possible to prevent spoiling the aesthetic appearance of the connecting portion of the tubular member.

According to the present invention, tubular members can be reliably connected with a simple structure.

It is an exploded perspective view which shows the connector which concerns on one Embodiment of this invention. It is a front view which shows the state which assembled the connecting tool of FIG. FIG. 5 is a cross-sectional view taken along the line AA in a state where the connecting tool of FIG. 1 is assembled. It is a figure which shows the 1st holding part. FIG. It is the end view of the line AA which shows the holding piece. It is a schematic diagram which shows the method of connecting two tubular members by a connecting tool.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

With reference to FIGS. 1 to 3, the connector 10 according to an embodiment of the present invention is used to connect two tubular members 34a, 34b (described later), and includes a bolt-shaped shaft portion 12. The shaft portion 12 has a male screw 14 on its outer circumference. A stopper 16 is provided at a substantially central portion of the outer circumference of the shaft portion 12 so as not to rotate with respect to the shaft portion 12. The stopper 16 is formed in a nut shape. The shaft portion 12 and the stopper 16 are made of, for example, iron.

Further, in the connector 10, one end of the shaft portion 12 is screwed in and the first holding portion 18a attached to the end portion of one tubular member 34a, and the other end portion of the shaft portion 12 is screwed in and the other end. It includes a second holding portion 18b attached to the end of the tubular member 34b. The first holding portion 18a and the second holding portion 18b are made of, for example, plastic or die casting.

With reference to FIG. 4, a plurality of first holding portions 18a extend from one main surface of the annular portion 20 and the annular portion 20 in the axial direction at intervals in the circumferential direction and are fitted into the tubular member 34a. (In this embodiment, five) holding pieces 22 are included. Each holding piece 22 has a groove portion 24 screwed with the male screw 14 of the shaft portion 12 on the inner surface in the radial direction. That is, female threads are substantially formed by the grooves 24 of the plurality of holding portions 22. As shown in FIG. 5, from the base 26 side to the tip 28 side of the holding piece 22, the groove 24 is formed so that its thread is low (that is, the degree of thread cut off is large). The diameter of the female screw formed by the plurality of groove portions 24 is set to be small. As a result, as shown by the alternate long and short dash line in FIGS. 4A and 4B, the holding piece 22 opens radially outward in response to the screwing of the shaft portion 12. That is, the holding piece 22 opens outward in the radial direction with the base portion 26 as a fulcrum on the tip end portion 28 side, and can press the inner peripheral surface of the tubular member 34a. Each holding piece 22 has a locking portion 30 that locks the stopper 16 at the end on the annular portion 20 side. Since the second holding portion 18b is configured in the same manner as the first holding portion 18a, the overlapping description thereof will be omitted.

Returning to FIG. 3, in a state where the first holding portion 18a and the second holding portion 18b are assembled to the shaft portion 12 until the annular portions 20 come into contact with each other, the accommodating portion 32 accommodating the stopper 16 is the first holding portion 18a. And the second holding portion 18b.

Using such a connecting tool 10, the two tubular members 34a and 34b are connected as follows.

First, referring to FIG. 6A, a plurality of holding pieces 22 of the first holding portion 18a are fitted into the end portion of one tubular member 34a. In that state, the bolt-shaped shaft portion 12 is screwed into the first holding portion 18a from one end side. Then, the male screw 14 on the outer peripheral surface of the shaft portion 12 on the one end side is screwed into the groove portion 24 of each holding piece 22 of the first holding portion 18a, and as it advances, each holding piece 22 is radially oriented. It is pushed outward and spread out. At this time, in each holding piece 22 of the first holding portion 18a, the tip portion 28 side opens outward in the radial direction with the base portion 26 on the annular portion side as a fulcrum. Then, referring to FIG. 6B, when the shaft portion 12 is screwed into the first holding portion 18a until the stopper 16 comes into contact with the locking portion 30, each holding piece 22 of the first holding portion 18a is screwed. Presses the inner peripheral surface of one of the tubular members 34a, and is strongly pressure-bonded to the inner peripheral surface.

Then, referring to FIG. 6B, a plurality of holding pieces 22 of the second holding portion 18b are fitted into the end portion of the other tubular member 34b. In this state, the shaft portion 12 attached to one of the tubular members 34a is screwed into the second holding portion 18b from the other end side. Then, the male screw 14 on the outer peripheral surface of the other end side of the shaft portion 12 is screwed into the groove portion 24 of each holding piece 22 of the second holding portion 18b, and as it advances, each holding piece 22 has a diameter. It is pushed outward in the direction and spread out. At this time, in each holding piece 22 of the second holding portion 18b, the tip portion 28 side opens outward in the radial direction with the base portion 26 on the annular portion 20 side as a fulcrum.

Then, referring to FIG. 6C, the shaft portion 12 is screwed into the second holding portion 18b until the annular portion 20 of the first holding portion 18a and the annular portion 20 of the second holding portion 18b come into contact with each other. Then, each holding piece 22 of the second holding portion 18b presses the inner peripheral surface of the other tubular member 34b and is strongly pressure-bonded to the inner peripheral surface. At this time, the stopper 16 comes into contact with each of the locking portions 30 of the second holding portion 18b (see FIG. 3).

In this way, the two tubular members 34a and 34b can be reliably connected by the connecting tool 10 having a simple structure.

The shaft portion 12 can be easily rotated by rotating the stopper 16. Further, the degree of screwing of the shaft portion 12 into the first holding portion 18a and the second holding portion 18b, that is, the position of the shaft portion 12 can be appropriately set only by rotating the stopper 16 until it comes into contact with the locking portion 30. , The connection work becomes smooth.

In order to connect the two tubular members 34a and 34b, the first holding portion 18a attached to one tubular member 34a and the second holding portion 18b attached to the other tubular member 34b are attached to each other's annular portion 20. When assembled to the shaft portion 12 until they come into contact with each other, the stopper 16 is accommodated in the accommodating portion 28 and is not exposed to the outside from between the two annular portions 20. Therefore, it is possible to prevent fine dust and dirt from entering the accommodating portion 28 from between the two annular portions 20, and it is possible to prevent spoiling the aesthetic appearance of the connecting portions of the tubular members 34a and 34b.

The connector 10 is preferably used when the tubular members 34a and 34b form a handrail. Further, the connecting tool according to the present invention is also preferably used when the tubular member constitutes a scaffolding at a construction site or the like, and can be used in any situation where two tubular members are connected.

In the above-described embodiment, when the two tubular members 34a and 34b are connected by using the connecting tool 10, the stopper 16 locks the locking portion 30 of the first holding portion 18a and the second holding portion 18b. Although the case where both parts 30 are in contact with each other has been described, the present invention is not limited to this. The connector according to the present invention may be configured such that the stopper contacts only one of the locking portion of the first holding portion and the locking portion of the second holding portion.

In the above-described embodiment, the case where the five holding pieces 22 are formed on the annular portion 20 has been described, but the present invention is not limited to this. In the connector according to the present invention, it is sufficient that two or more holding pieces are formed in the annular portion.

10 Connector 12 Shaft 14 Male screw 16 Stopper 18a 1st holding part 18b 2nd holding part 20 Ring part 22 Holding piece 24 Groove 30 Locking part 32 Accommodating part 34a, 34b Tubular member

Claims (3)

A connecting tool for connecting two tubular members.
A shaft with a male screw and
A first holding portion into which one end of the shaft portion is screwed in and attached to the end portion of the tubular member.
It is provided with a second holding portion into which the other end of the shaft portion is screwed in and attached to the other end portion of the tubular member.
The first holding portion and the second holding portion are each provided with an annular portion and a plurality of holdings extending axially and spaced apart from each other in the circumferential direction from one main surface of the annular portion and fitted into the tubular member. Including pieces
Each holding piece has a groove portion screwed with the male screw of the shaft portion on the inner surface in the radial direction, and opens outward in the radial direction in response to the screwing of the shaft portion to press the inner peripheral surface of the tubular member. A connector that can be formed. Further including a stopper provided on the outer periphery of the shaft portion so as not to rotate with respect to the shaft portion.
The connector according to claim 1, wherein each holding piece has a locking portion for locking the stopper at an end portion on the annular portion side. In a state where the first holding portion and the second holding portion are assembled to the shaft portion until the annular portions come into contact with each other, the accommodating portion accommodating the stopper includes the first holding portion and the second holding portion. The connector according to claim 2, which is formed by.

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