JPH027185Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a collar that rotatably connects links in a pipe shutter.

As shown in FIG. 4 (configuration of the link collar disclosed in Japanese Utility Model Publication No. 55-26472), a conventional link collar of this kind has a flange formed at both ends of a cylinder a through annular grooves b, b. In addition to providing parts c and c, notch grooves d and d are provided at several places on both end faces to divide the flange parts c and c into a plurality of parts, but links e and e
In order to fit the mounting holes h provided at the ends of the annular grooves b into the annular grooves b, it is necessary to forcibly deform all the split flanges c inwardly, and the links e and When removing it from the annular groove b, the flange c must be forcibly deformed, which makes it extremely difficult to attach and remove, and the link e and the flange c may be damaged and become unusable, or the shutter cannot be opened or closed on a daily basis. If this happens, a horizontal force acts on the link, and the split collar pieces, which are separated by the notched grooves and have reduced rigidity, will fall off one after another, and after a few years, the link and collar will come apart and become unusable as a shutter. There were flaws. There is also a grill shutter as shown in Japanese Utility Model Application Publication No. 57-16869, but in this one, a U-shaped groove is cut in the link collar so that the outside diameter of the collar can be easily bent to a smaller diameter. However, this function works effectively when inserting a link into a link collar, but when removing a link from a link collar, there is no "grasp" to compress the collar, and in the end the collar has no choice but to be destroyed. The drawback was that there was no.

In order to eliminate such drawbacks, the present invention has been developed to allow the link to be attached and detached with one touch by simply reducing the pipe insertion support cylinder in its entirety in the radial direction so that it can overcome the flanges provided at both ends of the cylinder. The purpose of this invention is to provide a link collar for a pipe shutter configured to allow

The embodiments of the present invention will be explained with reference to the drawings: 1
is a pipe insertion support cylinder made of an elastically deformable material such as synthetic resin, and the inner diameter is formed to a size that allows the pipe 8 of the pipe shutter to be inserted thereinto. 2,2
is a circumferential groove of an appropriate width provided at both ends of this cylinder 1 over the entire circumference, and a circular hole 10 provided at an end of the link 9.
This is to fit the two.

Reference numerals 3 and 3 denote flanges integrally formed on the outer periphery of both ends of the cylindrical body 1, which prevent the link from coming off after the link is fitted. Reference numeral 4 denotes the central large diameter portion of the cylinder 1, and the cylinder can be reduced in the radial direction by grasping it with fingers and applying force. The circumferential groove 2 is provided between the opposing annular surfaces of the collar portion 3 and the central large diameter portion 4.

Reference numeral 5 denotes a free part formed by cutting a suitable portion of the pipe insertion supporting cylinder 1 over the entire length, and when the cut-out opposing end surfaces 6, 6 are brought into close contact with each other, the diameter of the cylinder 1 is reduced. After a while, the flange part 3 becomes the circular hole 1 of the link 9.
It is formed so that it can be inserted into the hole.

With this structure, when the central large diameter part of the cylinder 1 in the direction perpendicular to the free part 5 is manually pressed, the cylinder 1 contracts in the radial direction and the separated end face 6 of the free part 5 is compressed. , 6 are brought into close contact with each other, and the entire collar portion is deformed into a shape into which the circular hole 10 of the link 9 is inserted.

In this state, the links 9 are attached to the flanges 3, 3 at both ends of the cylinder 1.
is inserted through the circular hole 10 and fitted into the circumferential grooves 2, 2,
After that, when the pressing force on the cylinder 1 is released, the cylinder 1 as a whole elastically restores itself and the flanges 3, 3 expand.
The circular hole 10 of the link 9 is prevented from coming out of the collar 3.

In this way, the upper and lower ends of a large number of links 9, 9 are successively connected by the circumferential grooves 2, 2 of the cylinder 1, and the pipe 8 is inserted between the cylinders 1, 1 which communicate on the same axis in the lateral direction. This constitutes the shutter. Next, if any problems occur after configuring the shutter,
After removing the pipe, the link can be freely removed by pinching the central large diameter part of the link collar with your fingers.

As described above, the present invention has flanges 3, 3 on the outer periphery of both ends.
By removing a part of the pipe insertion support cylinder 1 which is integrally formed with the pipe insertion support cylinder 1 and releasing it 5, the pipe insertion support cylinder 1 can be expanded and contracted in the radial direction. Since this relates to a link collar for a pipe shutter, which has circumferential grooves 2, 2 for link fitting provided on the inside of the flanges 3, 3, the tube can be assembled by simply pressing the outer periphery of the cylindrical body 1 manually. The body 1 can be compressed in the radial direction as a whole to reduce the outer diameter of the flanges 3, 3 at both ends. This allows the pipe shutter to be assembled smoothly, and when the pressure on the cylinder body 1 is released, the cylinder body 1 recovers elastically, thereby reliably preventing the link from coming off. be.

In addition, since the cylinder body 1 can be contracted by manual pressure and maintained in that state, there is no damage to the flange part 3 of the cylinder body 1 or the link 9 when the link is attached or removed. Work can be done efficiently. Furthermore, since the link collar body and the flange are continuously integrated, except for one notch, the flange will not fall off during daily shutter operation, allowing you to use the shutter for a long time. It can be kept in beautiful condition.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view thereof, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. 1. FIG. 4 is a vertical sectional view of a conventional collar. 1... Pipe insertion support cylinder body, 2, 2... Circumferential groove,
3, 3... collar part, 5... free part.

Claims (1)

[Scope of utility model registration request] The pipe insertion support cylinder 1 is made by cutting off a part of the pipe insertion support cylinder 1 integrally forming the flanges 3, 3 on the outer periphery of both ends over the entire length and releasing it 5.
can be expanded and contracted in the radial direction, and a link fitting circumferential groove 2,
A link collar of a pipe shutter consisting of a large diameter part 2 in the center and a large diameter part 4 in between.