Note: Descriptions are shown in the official language in which they were submitted.
~ .I E. r~ l T~IIS 4M~ ;u
AI TRANSLATlON l - 215 2 0 5 ~
SPECIFICATION
CLAMP
TECHNICAL FIELD
This invention relates to a clamp used for the
connectlon of steel pipes or the like for a temporary
scaffold and a shelf or the like.
BACKGROUND ART
A clamp conventionally used in general is
structured such that a holding body is pivotally mounted
on one end of a body to be held, a base portion of a
clamping bolt is pivotally mounted on the other end of
the holding body, a U-shaped concave portion is formed
on the other end of the body to be held, a tip end
portion of the bolt is fitted in the concave portion,
and a nut is screwed onto the bolt to be clamped
together.
In this case, when pipes are assembled parallel
or orthogonally to each other, use has been made of a
method of superimposing the bottoms of two clamps back
to back and then riveting two clamps together, or
providing a plurality of projections on the bottom of
one clamp, drilling the bottom of the other clamp to
give holes to be correspondingly fitted to the
~ - 2 - 21~205~
projections, inserting the projections into the holes
and caulking the same for fixing. When pipes are
assembled diagonally to each other, a circular window is
provided in the bottoms of both clamps, and a cylinder
fitted to the circular window is freely inserted and
caulked so as to use the clamps as a universal clamp.
The clamps having the conventional structure
involve the problems that since the concave groove is
formed on the tip end of the body to be held, defects in
sectioh are produced to often bring about a lack of
strength, and working becomes complicated and so on.
In order to solve the problems described above,
the present inventors have developed a clamp as
disclosed in Japanese Utility Model Publication No.
57-18507. However, the present invention provides a
further improved clamp structured to pressedly tighten a
body to be held with bolts without providing any bolt
insertion hole and to be applicable to pipes having
different dimensions.
In general, pipes include a circular pipe in
cross section and a square pipe in cross section, and
the pipes respectively having two kinds of diameters are
often used. Various clamps are required in combinations
of the pipes having the different diameters with the
case of assembling the pipes orthogonally, parallel or
diagonally to each other. The management of these
various clamps increases in cost and becomes
3 21~205 l
complicated.
The present invention is devised in order to
solve the problems described above.
DISCLOSURE OF THE INVENTION
A clamp of the present invention is characterized
in that a holding body ~ is pivotally mounted on one end
of a body to be held 7, both base portions of a groove
type auxiliary holding body 10 are pivotally mounted on
the other end of the holding body 1, and a bolt 11 is
screwed onto the tip end of the auxiliary holding body
10 .
A spherical tip end portion of the bolt 11 is
pressed and fitted to a spherically concave receiving
portion A2 on the outside surface at the other end of
the body to be held 7 in case of using a thick pipe,
while being pressed and fitted to a spherically concave
receiving portion A1 on the outside surface at the other
end of the body to be held 4 in case of using a thin
pipe, so that the pipe is uniformly pressed and held by
the holding body 2, the body to be held 7 and a hinge
portion of the auxiliary holding body 10.
Further, in order to constitute an orthogonally
universal clamp, a square hole la is bored in the
holding body 1, and a circular hole 2a is bored in the
holding body 2. Then, a main shaft 3 composed of a
square column portion and a cylindrical portion is
_ 4 21~05l
inserted into the square hole la and the circular hole
2a, and the main shaft 3 and the holding body 1 are
rotated as one body by the square column portion of the
main shaft 3, while the holding body 2 is released from
the rotation of the main shaft 3 by the cylindrical
portion of the main shaft 3. The side of the square
column portion of the main shaft 3 is fixedly attached
to the holding body 1, and the other end of the main
shaft 3 constitutes a rotary plate 3a. A pin fit cover
member-4 is pivotally mounted on the holding body 2 with
a pin 5.
When the holding body 1 and the holding body 2
are used as a universal clamp, use is made under the
condition that the pin fit cover member 4 is pushed up
to release the holding body 1 and the holding body 2
from the rotation. When the holding body 1 and the
holding body 2 fixed orthogonally or parallel to each
other are used, the pin fit cover member 4 is covered
over the rotary plate 3a of the main shaft 3 to fix the
holding body 1 and the holding body 2 for rotation.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. l(a) is a front view showing an embodiment
in case of using circular pipe clamps combined with each
other at right angles;
Fig. l(b) is a top view of Fig. l(a);
Fig. 2(a) is a front view showing an embodiment
~ _ 5 - ~ S l
in case of using circular pipe clamps combined
diagonally to each other;
Fig. 2(b) is a top view of Fig. 2(a);
Fig. 3 is a view showing an embodiment applied to
a small-diameter circular pipe in case of welding a nut
13 to a top portion of an auxiliary holding body 10;
Fig. 4(a) is a front view showing an embodiment
in case of using square pipe clamps combined with each
other at right angles;
Fig. 4(b) is a top view of Fig. 4(a);
Fig. 5(a) is a front view showing an embodiment
in case of using square pipe clamps combined diagonally
to each other;
Fig. 5(b) is a top view of Fig. 5(a);
Fig. 6 is a view showing the operation of a
universal clamp;
Fig. 7(a) is a side view showing a main shaft 3
having a square rotary plate 3a;
Fig. 7(b) is a top view of Fig. 7(a);
Fig. 7(c) is a bottom view of Fig. 7(a);
Fig. 8(a) is a view showing a main shaft 3 having
a circular rotary plate 3a formed with a square hole 3d;
Fig. 8(b) is a view showing a pin fit cover
member 4 having a square projection 4b fitted to the
square hole 3d;
Fig. 9(a) is a view showing a main shaft 3 having
a circular rotary plate 3a formed with a cross groove
- 6 - 215 20~ 4
3e;
Fig. 9(b) is a view showing a pin fit cover
member 4 having a projection 4C fitted to the cross
groove;
Fig. 10(a) is a view showing a caulking
reinforcement washer; and
Fig. 10(b) is a side view of Fig. 10(a).
BEST MODE FOR EMBODYING THE PRESENT INVENTION
Figs. 1, 2 and 4 show an embodiment in case of
using a thick pipe, while Figs. 3 and 5 show an
embodiment in case of using a thin pipe, respectively.
A clamp of the present invention comprises a
holding body 2 pivotally mounted on one end of a body to
be held 7 with a pin 8. Both base portions of a
groove-type auxiliary holding body 10 are pivotally
mounted on the other end of the holding body 1 with a
pin 9, and a caulking reinforcement member 12 is caulked
to form an external thread at the tip end of the
auxiliary holding body 10 or a nut 13 is fixedly
attached to the tip end of the auxiliary holding body
10. A bolt 11 having a spherical tip end is screwed
onto the external thread. Incidentally, the tip end of
the auxiliary holding body 10 may be thickened so that
an external thread is formed on the thickened portion
and the bolt 11 is screwed onto the external thread
without using the caulking reinforcement member 12 and
- 21~2054
the nut 13. Spherically concave receiving portions Al
and A2 are formed on the outside surface at the other
end of the body to be held.
In case of using the clamp, pipes Bl and B2 are
surrounded with the holding body 1 and the body to be
held 7, and the tip end of the auxiliary holding body 10
is superimposed on the body to be held 7.
Subsequently, the bolt 11 is rotated to pressedly fit
the tip end of the bolt 11 to the concave receiving
portion Al or A2 on the outside surface at the other end
of the body to be held.
Fig. 6 is a view showing the operation of a clamp
which is made freely orthogonal. Hereinafter will be
described the operation of the clamp which is made
freely orthogonal with reference to Fig. 6.
A hole 2a is bored in the holding body 2 of the
clamp, and a cylindrical portion 3b of the main shaft 3
is freely inserted into the hole 2a. An octagonal
rotary plate 3a is formed at the top of the main shaft.
The cylindrical portion 3b extending from the octagonal
rotary plate 3a of the main shaft 3 is inserted into the
hole 2a of the holding body 2. A square column portion
3c extending from the cylindrical portion 3b of the main
shaft 3 is inserted into a square hole bored in the
holding body 1 and fixedly attached to the holding body
1, and the main shaft 3 is rotated together with the
holding body 1. A pin fit cover member 4 is pivotally
S ~
mounted on the holding body 2 with a pin 5.
In this case, when the main shaft 3 extends
through the holding body 1, use may be made of a
caulking reinforcement washer 6.
Next will be described the operation of a clamp
which is used as a freely orthogonal and parallel clamp.
(a) When the pipes are held diagonally to each other,
the clamp is used under the freely movable condition by
pushing up the pin fit cover member 4 to release the
rotation of the holding body 2 and the pin fit cover
member 4 from the rotation of the main shaft 3 and the
holding body 1.
(b) When the pipes are held parallel or orthogonally
to each other, the clamp is used under the condition
that the rotary plate 3a, thus, the main shaft 3 and the
holding body 1 are fixed parallel or orthogonally to
each other by means of a projection 4a of the pin fit
cover member 4 and a projection 2b of the holding body 2
by rotating the main shaft 3 and the holding body 1
parallel or orthogonally to the holding body 2, and then
covering the pin fit cover member 4 on the rotary plate
3a of the main shaft.
Fig. 1 shows an embodiment in case of using the
circular pipe clamps combined with each other at right
angles. In this embodiment, a caulking reinforcement
member 6 is used for the main shaft.
Fig. 2 shows an embodiment in case of using the
21S205~
circular pipe clamps combined diagonally to each other.
In this embodiment, the caulking reinforcement member is
used for the main shaft.
Fig. 3 shows an embodiment of clamping a thin
circular pipe.
Fig. 4 shows an embodiment in case of using the
square pipe clamps combined orthogonally to each other.
Fig. 5 shows an embodiment in case of using the square
pipe clamps combined diagonally to each other. In
either of the embodiments shown in Figs. 4 and 5, any
caulking reinforcement member 6 is not used.
Fig. 6 is a view for explaining the operation for
making freely orthogonal;
Fig. 7 is a view showing a main shaft 3 having a
square rotary plate 3a;
Fig. 8 shows a combination of the main shaft 3
having the circular rotary plate 3a formed with the
square hole 3d and the pin fit cover member 4 having the
square projection 4b fitted to the square hole 3d.
Fig. 9 shows a combination of the main shaft 3
having the circular rotary plate 3a formed with a cross
groove 3e and the pin fit cover member 4 having the
projection 4c fitted to the cross groove.
Fig. 10 is a view showing the caulking
reinforcement washer.
- 215205~
-- 10 --
POSSIBILITY OF INDUSTRIAL UTILIZATION
As has been described above, the clamp of the
present invention is provided with the auxiliary holding
body, and the bolt is screwed onto the tip end of the
auxiliary holding body to pressedly fit the spherical
tip end of the bolt to the spherically concave receiving
portion on the outside surface at the other end of the
holding body. Thus, it is not necessary to provide any
concave groove on the body to be held.
Therefore, the clamp of the present invention is
free from any defect in cross section, and there is no
fear of breakage when used. Further, since the tip end
of the bolt and the concave receiving portion of the
body to be held are brought into contact with each other
on their spherical surfaces, there is no problem in
rotating and tightening the bolts.
Since two concave receiving portions are provided
on the body to be held, the clamp can be applied to
pipes having different diameters with safety and
security.
Furthermore, it is possible to reduce the number
of combinations of clamps with circular and square pipes
in cross section depending on the size of the pipe
diameters, and the orthogonal, parallel or diagonal
assembling of the pipes. Thus, the cost for the
management can be reduced, and the management is
simplified.
