JPH0711239Y2 - Corner joint - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a joint for connecting bent portions of pipes used for temporary fences, fences, handrails, etc. for temporary construction in construction and civil engineering.

[Conventional technology]

When connecting pipes P such as steel pipes in a straight line, a single pipe joint J is used as shown in Fig. 7a, but when connecting pipes at an angle, the single pipe joint J is used. 7c
The orthogonal clamps C ₁ and C ₂ shown in the figure and the universal clamp C ₂ shown in FIG. 7c and the clamp C ₃ shown in FIG. 7c are used, and the pipes are connected in different steps.

[Problems to be solved by the device]

However, in the conventional connection method, as shown in FIGS. 7b and 7c, the end portion P _E of the pipe P projects at the connection portion, so
When the temporary passage S as shown in the figure is installed, there is a safety problem. Further, as shown in FIG. 9, when the temporary enclosure panel W is fixed to the assembled pipe P by the hook bolts B, etc.,
Since the connecting parts of the pipes connected by the orthogonal clamps C ₁ and C ₂ and the universal clamp C ₃ are in different stages, the height of the panel W must be adjusted and shifted by H to fix it.

The object of the present invention is to solve the inconveniences of the above-mentioned conventional example, there is no protrusion of the pipe end portion at the connecting portion of the pipe, the pipe is not stepped, and the position of the retaining pin of the pipe to be fitted is the contact member. Even if the position is not aligned with the cutout part, the collar can be turned to adjust the position, and it is to provide a pipe knuckle that can always connect in the same plane.

[Means for Solving the Problems]

According to the present invention, in order to achieve the above object, a pair of joint members each having an arcuate hinge portion at one end and a pipe fitting portion at the other end are pivotally attached by a pin at the hinge portion. In the Kuma joint formed by the above, the fitting portion of the pipe is provided with an uneven collar portion for rotating the fitting portion, and the hinge portion is rotatably provided on the collar portion, or The hinge part of the joint member has a pair of arcuate projecting pieces having pin holes, and the hinge part of the other joint member has a U-shaped pin insertion guide and a supporting piece for supporting the guide. The gist is that the U-shaped hinge portion is inserted between the pair of arcuate projecting pieces, the pins are inserted through the pin holes, and both joint members are rotatably pivoted. is there.

[Action]

According to the first aspect of the present invention, the bent portion of the pipe can be formed by overlapping the hinge portions of the pair of joint members and pin-joining each other, and fitting the pipes at the other ends. Since the hinge part is formed in an arc shape and is pivotally attached by a pin in the same plane, there is no protrusion of the pipe end as shown in FIG. 6 compared to the conventional joint part, and there is no step difference in the pipe. .

Further, if the pipe fitting portion of the joint member is rotatable in the circumferential direction via the rotating collar portion, the position of the retaining pin of the pipe to be fitted is displaced from the position of the notch portion of the joint member. Even if it is, you can rotate the collar to align it.

According to the present invention as set forth in claim 2, in addition to the above-mentioned action, the U-shaped hinge portion is inserted between the pair of arc-shaped projecting pieces so that the bin holes are aligned with each other, and the pin holes are pinned. Since both joint members are pivotally attached by inserting the pin, the length of inserting the pin is long, but the U-shaped hinge part has a pin insertion guide, so the pin does not get caught and smoothly. It is easy to insert, and since it also has a support piece for supporting this pin insertion guide, it can be made strong.

〔Example〕

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

FIG. 1 is a perspective view showing an exploded state of an embodiment of the present invention, and FIG. 2a is a perspective view showing an exploded state of another embodiment of the present invention.

In FIG. 1, reference numerals 2 and 2'indicate a pair of tenon-shaped joint members, each of which has an arcuate hinge portion 3 and 3'at one end thereof, and a fitting means for fitting a pipe P at the other end thereof, for example, Notch 4 engaging with retaining pin 6 attached to pipe P
Are formed. The diameter may be adjusted only so that the pipe P can be fitted tightly. The hinge portions 3 and 3'are overlapped with each other, the pin 5 is inserted into the pin hole 11, and the joint members 2 and 2'are rotatably pivoted at the hinge portion to form a bear joint.

In another embodiment shown in FIG. 2a, the joint member 2 is provided with a pair of arcuate projecting pieces 8 having pin holes 11, and the U-shaped hinge portion 9 of the joint member 2'is provided between the projecting pieces 8. Is inserted and the pin 5 is inserted, and the joint members 2 and 2'are pivotally attached. 1
Reference numeral 0 is a pin insertion guide, and 12 is a support piece that supports the pin insertion guide 10. Reference numeral 7 denotes a collar portion having an unevenness for rotating the pipe fitting portion of the joint member, which is rotatably inserted into the hinge portions 3 and 3 '. The collar portion and the hinge portion may be screwed together.

The Kuma joint 1 configured as described above can be rotated at an arbitrary angle in the same plane as shown in FIG.
As shown in FIG. 4, since the pipe fitting portions of the joint members 2 and 2 ′ are rotatable in the circumferential direction, the position of the retaining pin 6 of the pipe to be fitted is determined by the cutout portion 4 of the joint member 2. Even if the position is deviated from the position, the position can be adjusted by turning the collar 7.

Further, as shown in FIG. 5, if the hinge portion 3 is covered with a flexible cover 13, safety is improved and damage to the hinge portion caused by hitting an object is reduced. It is also aesthetically pleasing.

[Effect of device]

As described above, since the bent joint of the present invention can connect the bent portions of the pipe in the same plane as shown in FIG. 6, it is possible to form the step without causing the step difference of the pipe. The workability is improved because the adjustment of other mounting members such as the adjustment of the panel height based on the above is unnecessary. Since there is no protrusion of the connected pipe ends, safety is excellent,
It is also aesthetically pleasing.

Moreover, even if the position of the retaining pin of the pipe to be fitted is displaced from the position of the notch of the joint member, the collar can be rotated to adjust the position, and the connection can always be made in the same plane. It is a thing.

[Brief description of drawings]

FIG. 1 is a perspective view showing an exploded state of an embodiment of a kumad joint of the present invention, FIG. 2a is a perspective view showing an exploded state of another embodiment, and FIG. 2b is a line AA of FIG. 2a. Sectional view, FIG. 3 is a plan view showing rotation of the knuckle joint of the present invention, FIG. 4 is a partial sectional plan view of the same, and FIG. 5 is a state in which the hinge portion of the kumad joint of the present invention is covered and covered. FIG. 6 is a perspective view showing the usage state of the Kuma joint of the present invention, FIGS. 7a, 7b, and 7c are perspective views showing a conventional pipe joint, and FIG. 8 is a conventional view. 9 is a plan view showing a temporary passage provided using a pipe joint, FIG.
The figure is a perspective view of a temporary enclosure for temporary installation, which is also installed using a conventional pipe joint. 1 ... Kuma joint, 2,2 '... Joint member 3,3' ... Hinge part, 4 ... Notched part 5 ... Pin, 6 ... Prevention pin 7 ... Collar, 8 ... Arc shape Projecting piece 9 …… U-shaped hinge, 10 …… Pin insertion guide 11 …… Pin hole, 12 …… Supporting piece 13 …… Cover P …… Pipe, J …… Straight joint P _E …… Pipe end, C ₁ , C ₂ …… Orthogonal joint C ₃ …… Flexible joint, S …… Temporary passage W …… Panel, B …… Hook bolt H …… Different width

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Ichihara 1-2-8 Hatchobori, Chuo-ku, Tokyo Inside Shin-Nihon Forging Co., Ltd. (56) References Application No. 59-97371 (Act No. 61 -41734), a microfilm (JP, U) of the specifications and drawings attached to the application.

Claims (2)

[Scope of utility model registration request] 1. A Kuma joint having a pair of joint members, each of which has an arcuate hinge portion at one end and a pipe fitting portion at the other end, pivotally attached by a pin at the hinge portion. The Kuma joint which is characterized in that the fitting portion of the pipe is formed with a collar portion having an unevenness for rotating the fitting portion, and the hinge portion is rotatably provided on the collar portion. 2. The hinge portion of one joint member has a pair of arcuate projecting pieces having pin holes, and the hinge portion of the other joint member is U-shaped and has a pin insertion guide and a guide therein. A U-shaped hinge portion is inserted between the pair of arcuate projecting pieces, and a pin is inserted through a pin hole to pivotally attach both joint members. The Kuma joint according to Item 1.