JPH112231A - Clevis joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix an insertion part to opposed arms in a clevis part via no spacer without causing any play by forming a bolt hole arranged in the opposed arms in the clevis part into a hole having no seating face for a bolt head part and directly fastening an insertion part to be inserted between the opposed arms by means of the bolt head part. SOLUTION: A bolt 5, by which an insertion part 4 is inserted between opposed arms 2a, 2b in a clevis part 2 so as to be fixed to the clevis part 2, is a cap screw with a hexagon socket head. The bolt 5 is passed through bolt holes 6, 7 arranged in compliance with the opposed arm 2a and the insertion part 4 so as to be screwed into a screw hole 8 arranged in the opposed arm 2b. The bolt hole 6 arranged in the opposed arm 2a is formed into a hole possessing no seating face for the bolt head part. Therefore, the head part in the bolt 5, which is brought into contact with one face of the insertion part 4, directly presses the insertion part 4 so as to fix the insertion part 4 to the opposed arm 2b. In the bolt hole 6, the diameter is set to be substantially equal to that of the head part of the bolt 5 for supporting the head part of the bolt 5 by means of the hole surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clevis joint for connecting two members by hinge connection.

[0002]

2. Description of the Related Art A clevis joint is generally used when two members are connected to each other with a variable connection angle.

FIG. 3 shows a general clevis joint. This is because the clevis portion 2 provided on the first member 1
The insertion portion 4 provided on the second member 3 is inserted between the opposed arms 2a and 2b, and the arms 2a and 2b and the insertion portion 4 are connected with one bolt 5. The bolt 5 is passed through bolt holes 6 and 7 provided corresponding to the arm 2a and the insertion portion 4, and screwed into a screw hole 8 provided in the arm 2b. In addition, the bolt hole 6 is the bolt 5
It is a hole with a seat for seating the head of the user.

The members 1, 3 connected by the clevis joint can freely rotate with the bolt 5 serving as a fulcrum of the hinge.

[0005]

FIG. 4A shows a handrail receiver 9 for stairs and a handrail support 10. These are connected using the above-mentioned clevis joint, and the posture of the handrail receiver 9 is adjusted to match the inclination of the handrail 11 shown in FIG.

In this case, it is desired that the handrail receiver 9 after the posture adjustment is fixed to the support 10 so as not to move. Therefore, a method has been adopted in which the bolt 5 is used as a connecting shaft, and the bolt 5 is tightened tightly to clamp the insertion portion 4 between the opposing arms 2a, 2b. In addition, the pulling of the opposing arms 2a, 2b by the bolt 5 becomes insufficient, leaving a gap between the insertion portion 4 and the opposing arms 2a, 2b, and the entire handrail is rattled.

The rattling stops when the fitting accuracy of the clevis fitting portion is increased or when the gap between the fitting portions is filled with a spacer. However, this causes an increase in cost and a decrease in work efficiency, which is not preferable.

[0008] An object of the present invention is to eliminate the above-mentioned disadvantages observed in a clevis joint.

[0009]

In order to solve the above-mentioned problems, according to the present invention, a bolt hole (an unthreaded side hole) provided in an opposite arm of a clevis portion has a seating surface of a bolt head. There was no hole, and the insertion part inserted between the opposing arms was directly tightened with the head of the bolt.

[0010]

The insertion portion inserted between the opposing arms of the clevis can be freely rotated with the bolt as a fulcrum before the bolt is tightened, and the rotation can adjust the connection angle.

When the bolt is completely tightened, the insertion portion is pressed against one arm of the clevis portion to be fixed, and the rattling stops.

[0012] The head of the bolt is received by the hole surface of the bolt hole, so that the double-supported state is maintained. Therefore, even if the seating surface of the bolt hole is eliminated, the stability of the connection is not impaired.

[0013]

FIG. 1 shows an embodiment of a clevis joint according to the present invention. 1 is a first member, 2 is a clevis portion provided integrally with the first member 1, 3 is a second member,
Reference numeral 4 denotes an insertion portion provided integrally with the second member 3. The insertion portion 4 is inserted between the opposing arms 2a and 2b of the clevis portion and fixed to the clevis portion 2 with bolts 5.

The bolt 5 is a hexagon socket head bolt. The bolt 5 is passed through bolt holes 6 and 7 provided corresponding to the arm 2a and the insertion portion 4, and screwed into a screw hole 8 provided in the arm 2b.

The bolt hole 6 provided in the arm 2a is a hole that does not have a seating surface for the bolt head. For this reason, the bolt 5 has its head in contact with one side of the insertion portion 4 and Is directly pressed and fixed to the arm 2b. The diameter of the bolt hole 6 is made substantially equal to the diameter of the head of the bolt 5 in order to support the head of the bolt 5 on the hole surface.

In the clevis joint thus constructed, the first member 1 is used as a handrail receiving portion, and the second member 3 is used as a handrail receiving support (1 may be a support, and 3 may be a handrail receiving). It is particularly suitable for connecting to other members, but can of course be used for connecting other members.

FIG. 2 shows a clevis joint for connecting pipes. Here, the first member 1 and the second member 3 are formed into plugs to be inserted into the ends of the connected pipes 12 and 13 respectively (or may be sockets externally fitted to the pipes).
3 is provided with the clevis portion 2 and the insertion portion 4 described in FIG. This joint can be used for connecting a pipe rack to a pipe frame.

[0018]

As described above, according to the clevis joint of the present invention, the insertion portion can be fixed to the arm of the clevis portion without looseness without increasing the fitting accuracy or interposing a spacer, thereby reducing the cost. This contributes to simplification of connection and improvement of reliability.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a clevis joint of the present invention.

FIG. 2 shows an example of a clevis joint for connecting pipes.

FIG. 3 is a cross-sectional view of a conventional clevis joint.

FIG. 4 (a) is a perspective view showing a handrail receiver connected by a clevis joint and a support for the handrail receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st member 2 Clevis part 2a, 2b Opposing arm 3 2nd member 4 Insertion part 5 Bolt 6, 7 Bolt hole 8 Screw hole 9 Handrail receiver 10 Supports 11, 12 Connected pipe

Claims (1)

[Claims] 1. An insertion portion provided on a second member is inserted between opposing arms of a clevis portion provided on a first member, and one bolt is passed through the clevis fitting portion, and one of the opposing arms is inserted. In the clevis joint for connecting the first member and the second member with the bolt screwed into the bolt, the bolt hole provided in the other of the opposed arms is a hole having no seating surface of the bolt head, and the insertion is inserted between the opposed arms. A clevis joint, wherein a part is directly tightened with a head of the bolt.