JP3113415U - Piping clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp for piping that can prevent loosening due to vibration or the like and has high safety and can be easily clamped and fixed.
SOLUTION: A clamp body 3 in which a plurality of arc-shaped gripping members 1 that are joined by fitting a pair of outer flanges 31 and 31 for piping are connected by pins 2; A bolt 5 and a nut 6 for tightening the pair of protruding pieces 4a and 4b, an L-shaped handle 7 for screwing the nut 6 back and forth, and a handle 7 are locked so as not to be detached from the nut 6 and to be rotated. Locking means L.
[Selection] Figure 1

Description

  The present invention relates to a piping clamp.

In general, a pipe clamp is used to connect ends provided with outer flanges of a fluid pipe. Conventionally, a clamp body in which a plurality of arc-shaped gripping members that are joined by fitting a pair of outer flange portions of a pipe are connected by a pin, and a bolt for fastening a pair of projecting pieces on the opening side of the clamp body And the piping clamp provided with the wing nut is known (for example, refer to patent documents 1). In this type of piping clamp, the wing nut is picked with a finger and rotated to perform tightening and fixing.
Japanese Utility Model Publication No. 5-90083

However, when the conventional wing nut type pipe clamp is used in a place where the vibration is intense, the wing nut is likely to loosen after tightening and fixing, and the fluid in the pipe leaks and an accident is likely to occur. In addition, the wing nut method can be easily tightened and fixed without requiring a tool, but has a problem that it is difficult to apply force and the tightening force is insufficient.
SUMMARY OF THE INVENTION An object of the present invention is to provide a piping clamp that can prevent loosening due to vibration or the like, has high safety, and can be easily clamped and fixed.

In order to achieve the above-described object, a piping clamp according to the present invention includes a clamp main body in which a plurality of arc-shaped gripping members that are fitted together by joining a pair of outer flange portions for piping are connected by pins. A bolt and a nut for tightening the pair of projecting pieces on the opening side of the clamp body, an L-shaped handle for screwing the nut back and forth, and preventing the handle from being detached from the nut and from rotating. Locking means for locking.
Also, a clamp body in which a plurality of arc-shaped gripping members that are joined by fitting a pair of outer flanges for piping are connected by a pin, and a pair of protruding pieces on the opening side of the clamp body are tightened A bolt and a nut, an L-shaped handle for screwing and retracting the nut, and a lock means for locking the handle so as not to be detached from the nut and to prevent the handle from rotating. A locking protrusion protruding from the handle and having a locking hole; a locking pin movable so as to be removable from the locking hole at a predetermined mounting rotation position of the handle; A resilient member that constantly urges and urges the stop hole in the forward projecting direction; and a projecting holding portion that projects from the predetermined arcuate gripping member and holds the locking pin movably. .

  Also, a clamp body in which a plurality of arc-shaped gripping members that are joined by fitting a pair of outer flanges for piping are connected by a pin, and a pair of protruding pieces on the opening side of the clamp body are tightened A bolt and a nut, an L-shaped handle for screwing and retracting the nut, and a lock means for locking the handle so as not to be detached from the nut and to prevent the handle from rotating. A locking protrusion protruding from the handle and having a locking hole; a locking pin movable so as to be removable from the locking hole at a predetermined mounting rotation position of the handle; A resilient member that constantly urges and urges the stop hole in the protruding direction of the tip, and a projecting holding portion that projects from the predetermined arcuate gripping member and holds the locking pin movably. And when the handle is locked The axis of the bolt and the nut, the axis of the locking pin and the locking hole, are disposed in an orthogonal shape.

According to the piping clamp according to the present invention, the nut can be easily and strongly tightened by the handle as compared with the conventional wing nut method. In addition, the nut can be prevented from loosening and can withstand large vibrations. Therefore, it can be made highly safe. Moreover, it can be set as the clamp for piping which is not wasted and is easy to handle.
Further, once set, the handle can be easily rotated to a predetermined mounting rotation position at any time, regardless of how many times the detachment is repeated thereafter, and can always be mounted with the same tightening torque.
Further, the locking can be surely performed with a simple operation of pulling and releasing the locking pin. Further, the structure of the locking means can be simplified. Moreover, there is no possibility that the lock is released against the intention.
Further, even when the entire piping clamp is vibrated up and down, left and right in the locked state of the handle, the handle can be prevented from being detached from the nut, and the loosening of the nut can be prevented more reliably.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments.
1 to 6, a piping clamp according to an embodiment of the present invention includes a plurality of arc-shaped gripping members 1 that are joined by fitting a pair of piping outer flange portions 31, 31. A clamp body 3 pivoted by a pin 2, a bolt 5 and a nut 6 for tightening a pair of projecting pieces 4a and 4b on the opening side of the clamp body 3, and an L-shaped handle 7 for screwing the nut 6 back and forth. And a lock means L for locking the handle 7 so as not to be detached from the nut 6 and not to rotate.

The arc-shaped gripping members 1 are three, 1a, 1b, and 1c. Further, an arc-shaped gripping member 1a and an arc-shaped gripping member 1b are pivotally connected to both ends of the arc-shaped gripping member 1c by pins 2, respectively. A substantially V-shaped or U-shaped concave groove 18 is formed on the inner peripheral side of these arc-shaped gripping members 1a, 1b, 1c (see FIG. 4). In the front view of FIG. 1, the clamp body 3 is substantially C-shaped, and the ends of the arc-shaped gripping member 1a and the arc-shaped gripping member 1b that are not pivotally connected to the pin 2 are clamp bodies. 3 is the opening side end.
The protruding piece 4a is formed to protrude radially outward at the end (on the side not pivoted by the pin 2) of the arc-shaped gripping member 1a located on the upper side. A through hole 14 is formed in the protruding piece 4a in the vertical direction (a direction parallel to the tangent). The protruding piece 4 a is formed with a hemispherical concave nut seat 16 along the upper opening edge of the through hole 14.
The protruding piece 4b is formed to protrude radially outward at the end (on the side not pivoted by the pin 2) of the arc-shaped gripping member 1b located on the lower side. A vertical through hole 15 is formed in the protruding piece 4b. Further, a hexagonal recess 17 is formed in the protruding piece 4b at the position of the lower opening end of the through hole 15.

The bolt 5 is in a state of passing through the through hole 15 of the protruding piece 4b and the through hole 14 of the protruding piece 4a when the piping clamp is fastened and fixed. At that time, the head 5 a of the bolt 5 is fitted into the hexagonal recess 17. By fitting the head 5a into the hexagonal recess 17, rotation of the bolt 5 is prevented.
The nut 6 is screwed with the bolt 5 that has passed through the through hole 14 of the projecting piece 4a when the clamp for piping is fastened and fixed. The nut 6 has a rounded chamfered portion (hemispherical head surface portion) 24 at one end. The rounded chamfered portion (hemispherical head surface portion) 24 is adapted to fit into the hemispherical concave nut seat portion 16 of the protruding piece 4a, thereby facilitating the axial alignment of the nut 6.
The longitudinal portion of the L-shaped handle 7 is a grip portion 7a. Further, a nut fitting hole 13 for fitting with the nut 6 is formed at an end portion of the short portion of the handle 7, whereby the handle 7 is detachable (in the direction of arrow B in FIG. 1). . The nut fitting hole 13 is formed in a hexagonal shape. Alternatively, the nut fitting hole 13 is formed such that the inner peripheral wall surface has a tooth shape (that is, in the shape of a socket hole such as a ratchet wrench).

Here, as shown in FIG. 1 and FIG. 2, the locking means L protrudes from the handle 7 and has a locking projection piece 9 having a locking hole 8 and a predetermined mounting rotation position A (see FIG. 6), the lock pin 11 is movable so that it can be inserted into and removed from the lock hole 8, and the lock hole 8 is always elastically biased in the tip protruding direction (the direction of arrow F in FIG. 2). It has a resilient member 12 and a protruding holding part 10 that protrudes from a predetermined arcuate gripping member 1a and holds the locking pin 11 in a movable manner (in the direction of arrow C in FIG. 1).
In the present embodiment, the predetermined mounting rotation position A is defined as a position where the grip 7a direction of the handle 7 substantially coincides with the longitudinal direction of the clamp body 3 in plan view (see FIG. 6).

The locking means L will be described in more detail. The locking projection piece 9 is provided on the lower side of the grip portion 7 a of the handle 7. The locking hole 8 is provided such that its axis H is in the same direction (parallel) as the direction of the grip portion 7a.
The locking pin 11 has a hook-shaped end stop 19. The locking pin 11 is disposed so that the shaft center I coincides with the shaft center H of the locking hole 8 when the handle 7 is locked. In this state, the shaft center G of the bolt 5 and the nut 6 and the shaft centers I and H of the locking pin 11 and the locking hole 8 are arranged orthogonally.
The protruding holding portion 10 is provided so as to protrude in the center and radially outward of the arc-shaped gripping member 1a. The protrusion holding portion 10 has a guide hole portion 25. By inserting the locking pin 11 through the guide hole portion 25, the locking pin 11 can be moved in the horizontal direction (in the direction of arrow C in FIG. 1). ).
Further, an inner flange portion 21 is formed on one end side of the guide hole portion 25. The inner flange portion 21 is adapted to hook the end stop portion 19 of the locking pin 11 to prevent the locking pin 11 from popping out.

The elastic member 12 is formed of a coil spring. The elastic member 12 is externally fitted to the locking pin 11 so that one end of the elastic member 12 is in contact with the end stopper 19 of the locking pin 11. Further, in a state where the resilient member 12 is inserted into the guide hole 25 together with the locking pin 11, the other end of the resilient member 12 contacts the lid member 22 attached to one open end of the guide hole 25. . That is, the resilient member 12 is positioned between the end stop portion 19 of the locking pin 11 and the lid member 22. Thereby, the elastic member 12 always urges and urges the front end portion 11a of the locking pin 11 in the front end protruding direction (the direction of arrow F in FIG. 2).
Further, a sealing material 23 is provided at the fitting portion between the lid member 22 and the guide hole 25, and the sealing member 23 prevents the lid member 22 from falling off.

Next, based on FIGS. 3-6, the usage method of the clamp for piping which concerns on this invention is demonstrated.
First, as shown in FIG. 3 and FIG. 4, the ends of a pair of fluid pipes 30 and 30 each having an outer flange 31 provided at the ends are butted. Next, the clamp body 3 with the arc-shaped gripping members 1a, 1b, and 1c being developed is fitted into the pair of outer flange portions 31 and 31 so that the concave grooves 18 of the arc-shaped gripping members 1a, 1b, and 1c are fitted. Install. At this time, the packing 26 is sandwiched between the concave groove 18 and the outer flange portions 31 and 31.
Next, the bolt 5 is inserted through the through hole 15 of the protruding piece 4b and the through hole 14 of the protruding piece 4a. Then, the nut 6 is screwed onto the tip of the bolt 5 with the head 5 a of the bolt 5 fitted in the hexagonal recess 17. Then, the nut 6 is turned with a finger (hand) and tightened until the rounded chamfered portion 24 of the nut 6 comes into contact with the nut seat 16 and the nut 6 cannot be turned with the force of the finger (hand).

Next, the handle 7 is attached to the nut 6 and rotated, and the nut 6 is further tightened (in the direction of arrow D in FIG. 4). The handle 7 needs to be rotated to a predetermined mounting rotation position A in order to operate the locking means L. Further, it is necessary to rotate to a position where a predetermined tightening force is obtained. However, the handle 7 may be present at a position J far away from the predetermined mounting rotation position A at a position immediately before a predetermined tightening force.
In this case, as shown in FIG. 5, the handle 7 is once removed from the nut 6, the direction of the handle 7 is changed so as to be closer to the predetermined mounting rotation position A, and then the handle 7 is attached to the nut 6 again.

Then, the locking pin 11 is pulled so that the tip end portion 11a is almost housed in the protruding holding portion 10 (in the direction of arrow E in FIG. 5). In this state, as shown in FIG. Further rotate to the rotation position A and tighten (direction of arrow K in FIG. 6).
As shown in FIGS. 2 and 6, in a state where the axis I of the locking pin 11 and the axis H of the locking hole 8 are aligned with each other, the distal end portion 11 a of the locking pin 11 is inserted into the locking hole 8. Insert and lock. In this locked state, the handle 7 is restricted from moving in the direction of the axis G, is restricted from rotating, and does not come off the nut 6. And since the handle | steering-wheel 7 does not rotate, the nut 6 also does not rotate and the nut 6 is prevented from loosening.
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It should be noted that when the pipe 30 is disassembled or the clamp is detached, the nut 6 may be loosened and the operation opposite to that described above may be performed.

In addition, this invention is not limited to the above-mentioned embodiment, A design change is possible in the range which does not deviate from the summary of this invention. For example, in the present embodiment, the case where there are three arc-shaped gripping members 1... Is illustrated, but the present invention is not limited to this, and the number of arc-shaped gripping members 1. It is good also as above.
Further, in the present embodiment, the case where the resilient member 12 is formed of a coil spring is illustrated, but the present invention is not limited to this, and the latch pin is resiliently biased using a bamboo shoot spring or a leaf spring. Also good.

  As described above, the clamp for piping according to the present invention is a clamp in which a plurality of arc-shaped gripping members 1... The main body 3, the bolt 5 and the nut 6 for tightening the pair of projecting pieces 4 a and 4 b on the opening side of the clamp body 3, the L-shaped handle 7 for screwing the nut 6 back and forth, and the handle 7 are not detached from the nut 6. Thus, the lock means L for locking so as not to rotate is provided. Therefore, the nut 6 can be easily and strongly tightened by the handle 7 as compared with the conventional wing nut system. Further, since the position of the handle 7 is fixed by the lock means L, the nut 6 can be prevented from loosening and can withstand large vibrations. Therefore, it can be made highly safe.

Further, since the handle 7 has two functions of a tightening tool for the nut 6 and a loosening stopper for the nut 6, compared to a case where these two functions are obtained by separate members, there is no waste and handling is also possible. Easy.
Further, once set, the handle 7 can be easily rotated to the predetermined mounting rotation position A at any time, regardless of how many times the attachment and detachment is repeated thereafter.

  Further, the locking means L can be inserted into and removed from the locking hole 8 at a predetermined mounting rotation position A of the handle 7 and a locking projection piece 9 having a locking hole 8 protruding from the handle 7. The locking pin 11 that is movable in this manner, the resilient member 12 that constantly urges and urges the locking hole 8 in the protruding direction (the direction indicated by the arrow F in FIG. 2), and a predetermined arc-shaped gripping member 1 (1a) ) And a projecting holding portion 10 that movably holds the locking pin 11, so that the locking pin 11 can be reliably locked while being a simple operation of pulling and releasing. Further, the structure of the locking means L can be simplified. In addition, since the locking pin 11 is always bullet-biased in the tip protruding direction, there is no possibility that the lock is released against the intention.

  Further, in the locked state of the handle 7, the shaft center G of the bolt 5 and the nut 6 and the shaft centers I and H of the locking pin 11 and the locking hole 8 are arranged orthogonally, so that the locked state Thus, the handle 7 can be prevented from being detached from the nut 6 even when the entire piping clamp is vibrated or tilted vertically and horizontally. That is, loosening of the nut 6 can be prevented more reliably.

It is a partially broken front view which shows the clamp for piping which concerns on one Embodiment of this invention. It is a cross-sectional front view which shows a locking means. It is a front view which shows the whole structure. It is a top view for attachment explanation of a clamp for piping. It is a top view for attachment explanation of a clamp for piping. It is a top view for attachment explanation of a clamp for piping.

Explanation of symbols

1, 1a, 1b, 1c Arc-shaped gripping member 2 Pin 3 Clamp body 4a Projection piece 4b Projection piece 5 Bolt 6 Nut 7 Handle 8 Locking hole 9 Locking protrusion
10 Protruding holder
11 Locking pin
12 bullet members
31 Outer flange A Predetermined mounting rotation position G, H, I Shaft center L Locking means

Claims (3)

  A clamp body (3) in which a plurality of arc-shaped gripping members (1) joined by fitting a pair of outer flanges (31), (31) for piping are connected by pins (2), and the clamp A bolt (5) and a nut (6) for tightening the pair of projecting pieces (4a) (4b) on the opening side of the main body (3), and an L-shaped handle (7) for screwing the nut (6) back and forth. A pipe clamp comprising: locking means (L) for locking the handle (7) so as not to be detached from the nut (6) and so as not to rotate. A clamp body (3) in which a plurality of arc-shaped gripping members (1) that are joined by fitting a pair of outer flanges (31) (31) for piping are connected by pins (2), and the clamp A bolt (5) and a nut (6) for tightening the pair of projecting pieces (4a) (4b) on the opening side of the main body (3), and an L-shaped handle (7) for screwing the nut (6) back and forth. Locking means (L) for locking the handle (7) so as not to be detached from the nut (6) and not to rotate,
The locking means (L) protrudes from the handle (7) and has a locking protrusion (9) having a locking hole (8), and a predetermined mounting rotation position (A) of the handle (7). The locking pin (11) is movable so that it can be inserted into and removed from the locking hole (8), and the resilient member that constantly urges and urges the locking hole (8) in the protruding direction. (12) and a projecting holding portion (10) that protrudes from the predetermined arcuate gripping member (1) and holds the locking pin (11) movably. Clamp for piping. A clamp body (3) in which a plurality of arc-shaped gripping members (1) that are joined by fitting a pair of outer flanges (31) (31) for piping are connected by pins (2), and the clamp Bolts (5) and nuts (6) for tightening the pair of projecting pieces (4a) (4b) on the opening side of the main body (3), and an L-shaped handle (7) for screwing the nuts (6) back and forth. Locking means (L) for locking the handle (7) so as not to be detached from the nut (6) and not to rotate,
The locking means (L) protrudes from the handle (7) and has a locking protrusion (9) having a locking hole (8), and a predetermined mounting rotation position (A) of the handle (7). The locking pin (11) is movable so that it can be inserted into and removed from the locking hole (8), and the resilient member that constantly urges and urges the locking hole (8) in the protruding direction. (12) and a projecting holding portion (10) that protrudes from the predetermined arcuate gripping member (1) and holds the locking pin (11) in a movable manner,
Further, in the locked state of the handle (7), the shaft center (G) of the bolt (5) and the nut (6), and the shaft center of the locking pin (11) and the locking hole (8) ( I) (H) is a pipe clamp characterized by being arranged orthogonally.

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