JPH0532643Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an improvement of a ring-shaped clamp suitable for winding and locking a workpiece.

<Prior Art> Conventionally, a plurality of clamping pieces a, a' having a partially annular shape and jointly forming an annular shape, and the above-mentioned clamping pieces connected to each other by rotatably locking the clamping pieces are conventionally used. There existed a ring-shaped clamp as shown in FIG. 4, which consisted of a pin b parallel to the axis of the ring and a locking mechanism connecting both ends of the connected clamping pieces a and a'.

As shown in Fig. 4, the locking mechanism consists of a screw rod c and a nut d that are fixed to one end of the clamping piece.
It was a two-pronged opening e provided at the other end.

However, the problem with this ring-shaped clamp is that it requires a tool such as a spanner to tighten or loosen the nut d each time it is installed or removed, making it extremely time-consuming and troublesome. .

Therefore, the present inventor devised a device as shown in FIG. 5 that can be easily fastened to the two-pronged opening e using a wedge f.

However, there is a risk that the wedge f may loosen due to vibration etc. during use, and measures such as installing a nut to prevent loosening must be taken. Ta.

On the other hand, Publication No. 3163-3163 and Publication No. 47-
A clamp provided with a toggle mechanism is proposed in Japanese Patent No. 28183.

These clamps include a plurality of ring-shaped clamping pieces that are connected by pins, and an operating piece that draws and tightens both ends of the consecutive clamping pieces.
In addition, the operating piece is formed into a long shape so that it can be operated by hand, and the base end of the operating piece is pivoted to one end of the clamping piece. By locking the other end of the coupling piece and the other end of the clamping piece and rotating the operating piece, the engaging piece on the operating piece acts beyond the pivot center of the clamping piece, making it easy to operate by hand. It is designed to securely hold pipes, etc. with the holding pieces.

However, in these devices, the operating piece is formed into an elongated shape and the engagement piece is pivotally supported near its base end, so the distance from the tip of the operating piece to its pivot point is long. There is. As a result, while it is easy to perform the tightening operation by hand, if another object hits the tip of the operation piece during the operation after tightening, there is a risk that the operation piece will easily rotate and become unfastened. Therefore, it is dangerous and undesirable when used for constructing scaffolding or the like at a construction site where there is a high possibility of being hit by other objects.

Furthermore, when used for scaffolding at such construction sites, pipes of slightly different diameters must be clamped, and for safety reasons, the pipes tend to be tightly fixed so that they do not rotate. However, these clamps clamp pipes of a certain diameter with a certain clamping force, so when clamping a pipe of a smaller diameter, for example, they cannot be clamped with a strong clamping force, while when clamping a pipe of a larger diameter, they can be clamped tightly enough to prevent it from rotating, but the operating piece becomes heavy to turn and difficult to operate by hand.

Therefore, these Jikoko No. 46-3163 and Jikkosho
The clamp disclosed in Japanese Patent No. 47-28183 has a problem in that it is difficult to adapt it to use on scaffolding at construction sites.

<Problem that the invention aims to solve> This invention was proposed in view of the above circumstances.
The purpose is to provide a ring-shaped clamp suitable for use on scaffolding at construction sites, etc., which can be securely fixed to pipes, etc., and can also reliably prevent loosening after fixing.

<Means for Solving the Problems> The present invention solves the above problems by providing a ring-shaped clamp having the following features.

The tightening mechanism in the annular clamp of the present invention includes a right toggle link 4, pins 9 that pivotally support the right toggle link 4 and the clamping piece, a left toggle link 5, and a right toggle link. 4 is provided.

One end of the right toggle link 4 is pivotally supported on the right end of the clamping piece 1 by pins 9, 9, and a tool 10 is attached to the other end.
A pressing operation part 4a that is locked to and pressed in the rotational direction
Equipped with. The right toggle link 4 is rotated in the vertical direction by this pressing operation section 4a.

The pins 9, 9 are tool locking portions 9 that lock with the tool 1.
b.

The tool 10 is constructed separately from the right toggle link 4, and has a handle portion 100 at one end and a locking portion 110 that locks onto the right toggle link 4 at the other end. Further, this locking portion 110 has a projection 1 that locks with the pressing operation portion 4a of the right toggle link 4.
12, and a pawl 111 that locks with the tool locking portion 9b of the pins 9,9.

The left part of the left toggle link 5 is locked to the left end of the clamping piece 1, and the right end is pivotally supported near the pressing operation part 4a of the right toggle link 4.

Then, the tool 1 is locked to the pressing operation part 4a of the right toggle link 4 and the tool locking part 9b of the pins 9, 9.
By rotating the right toggle link 4 and the left toggle link 5, the right toggle link 4 and the left toggle link 5 form a toggle mechanism to draw and fasten both ends of the clamping piece 1 to each other, and also to release the fastening.

<Function> In the present invention, the right toggle link 4 is provided with a pressing operation part 4a, the pins 9, 9 are provided with a tool locking part 9b, and the tool 10, which is separate from the right toggle link 4, is attached to these parts. By locking and rotating the handle portion 100 of the tool 10, the right toggle link 4 and the left toggle link 5 form a toggle mechanism to draw and tighten both ends of the clamping piece 1. When the right toggle link 4 is rotated, it can be easily tightened and unfastened using a tool even when the rotation operation requires a strong rotational torque.

This makes it possible to strongly hold pipes and the like.

In addition, since the right end of the left toggle link 5 is pivotally supported near the operating section 4a of the right toggle link 4, the operating section 4a
A considerable amount of force is required to rotate the right toggle link 4 by operating the . Therefore, after the pipe or the like is clamped, it is possible to prevent the right toggle link 4 from rotating even if another object unexpectedly hits the pressing operation portion 4a.

<Embodiment> FIGS. 1 to 3 show an embodiment of the present invention, with FIG. 1 showing a front view and FIG. 2 a plan view.

FIG. 3 is a front view showing the open state of FIG. 1.

Hereinafter, preferred embodiments of the invention will be described in detail by way of example with reference to these drawings.

However, the dimensions, shapes, materials, relative positions, etc. of the components described in this example are not intended to limit the scope of this invention, unless specifically stated. , is merely an illustrative example.

Incidentally, the up, down, left and right in the following explanatory text indicate the up, down, left and right in the drawings.

As shown in Figure 1, the ring-shaped clamp of the present invention is
This is a clamp that winds and locks a workpiece having a circular cross section, and has three clamping pieces: a left clamping part 1, a central clamping part 2, and a right clamping part 3, and a right toggle link 4 and a left toggle link 5. It is composed of two toggle links and a tool 10 for rotating the right toggle link 4.

Each of the gripping pieces 1, 2, and 3 is made by bending a steel plate, and the left gripping piece 1, the center gripping piece 2,
The center gripping piece 2 and the right gripping piece 3 are pivotally connected by pins 6 and 7.

The inner surfaces of each of the clamping pieces 1, 2, and 3 have a partially annular shape, and when clamped, they jointly form an annular shape.

The other end of the left arm holding piece 1 is a bifurcated opening 11, and is adapted to lock the left end 51 of the left toggle link 5.

The left end 51 of the left toggle link 5 has a bolt shape, and a nut 52 for adjusting the length of the left toggle link 5 is screwed there. The right end 53 is pivotally connected to the right toggle link 4 by a pin 8.

As shown in FIG. 2, the right toggle link 4 is a steel plate bent into a substantially U-shape, and one end is
It is pivotally supported by the right arm holding piece 3 and pins 9, 9, and the other end is
It is provided with pressing operation parts 4a, 4a.

These pins 9, 9 and the right toggle link 4 are
As shown in the figure, the right toggle link 4 and the right arm holding piece 3 are pivotally supported with a gap formed between them. The gaps between the pins 9, 9 form tool locking parts 9b, 9a, and the claws 11 of the tool 10, which will be described later,
1 and 111 can be locked in the tool locking parts 9b and 9a.

The pressing operation parts 4a, 4a are locked to a tool 10, which will be described later, and are pressed by the tool 10 in a rotational direction, so that the right toggle link 4 is rotated. In this embodiment, the upper and lower surfaces on the right end side in FIG. 1 constitute the pressing operation parts 4a, 4a. The top surface becomes the pressing operation part when holding pipes, etc., and on the other hand,
The lower surface serves as a pressing operation part when removing a clamped pipe, etc.

Further, the right end of the left toggle link 5 is pivotally supported near the pressing operation portion 4a of the right toggle link 4.

As shown in FIG. 6, the tool 10 is composed of a handle portion 100 on the right side and a locking portion 110 on the left side. Press operation parts 4a, 4a
and claws 111, 111 disposed on the lower end side and rotatably engaged with the tool locking portions 9b, 9a of the pins 9, 9.

The pins 6, 7, 8, 9, and 9 mentioned above are all provided parallel to the axis of the ring.

The configuration of the ring-shaped clamp of the present invention is as described above.

Next, how to use it will be explained.

The ring-shaped clamp of the present invention is wound around a portion of the workpiece A to be clamped that has a substantially circular or cylindrical cross section.

The nut 52 at the left end of the left toggle link 5 is locked into the opening 11 of the left arm holding piece 1.

(See Figure 3) Adjust the length of the left toggle link 5 to an appropriate length by turning the nut 52 of the left toggle link 5 by hand.

(Once adjusted, there is almost no need to adjust in the future.) Connect the pressing operation parts 4a, 4a of the right toggle link 4 and the protrusion 112 of the tool 10 to the tool locking parts 9b, 9a of the pins 9, 9 and the tool. 10 claws 111, 11
1 and 1, respectively, and set the tool 10. Then, the handle portion 100 of the tool 10 is rotated downward (in the X direction shown in FIG. 3) by hand. At this time, since the tool 10 also rotates around the pins 9, 9, the right toggle link 4 can be easily rotated.

When the axis 5a of the left toggle link 5 enters inside the axis 9a of the pin 9 that pivotally supports the right toggle link 4 and the right arm holding piece 3, the state shown in Fig. 1 is reached and the locking is completed. After that, the right end of the left toggle link 5 is the pressing operation part 4a of the right toggle link 4.
Since it is pivoted near the pressing operation part 4a
A considerable amount of force is required to rotate the right toggle link 4 by operating the button, and the right toggle link 4 may also rotate if another object unexpectedly hits the pressing operation part 4a. can be prevented. Therefore, safety can be ensured at all times, making it suitable for use as scaffolding at construction sites.

To release the lock, just reverse the steps.

As described above, the present invention allows clamping and releasing with a single touch, thereby significantly reducing the time required for the work.

In this embodiment, only the ring-shaped clamp part was shown and explained, but of course, in order to be able to lock two workpieces as shown in Figs. 4 and 5, the two ring-shaped clamps may be pivoted or It can be combined with other clamps or attached to other objects in various combinations.

In addition, the workpiece to be clamped is not limited to a circular cross section, but also a square cross section.
It may be made into a polygon such as a hexagon, and the shape of the holding piece may be changed accordingly.

Furthermore, a pivoting mechanism and a locking mechanism of the toggle link,
The length adjustment mechanism etc. may also be changed as appropriate as shown below.

(a) Use the two-pronged open opening as the drilling hole.

(b) The length adjustment mechanism uses locking pawls instead of bolts and nuts.

C. Pass an elastic material such as a leaf spring, plastic, or rubber between the pins 6 and 7 to absorb the slight loosening that occurs when the pins are locked beyond the dead center.

(Of course, they may also be provided on the inner surfaces of the left and right gripping pieces.) D. The left gripping piece 1, the center gripping piece 2, and the right gripping piece 3 are in contact with the workpiece A to be clamped. On the contact surface,
Provide a non-slip material made of soft plastic or rubber with an uneven surface.

<Effects of the invention> As described above, the present invention enables easy operation with a tool when rotating the right toggle link, even when a strong rotational torque is required for the rotation operation, and allows pipes, etc. to be strongly clamped. can do.

In addition, since the right end of the left toggle link is pivoted near the operating section of the right toggle link, a considerable amount of force is required to operate the operating section and rotate the right toggle link, and after clamping a pipe, etc. This can prevent the right toggle link from rotating even if the operating section is accidentally hit by another object. Therefore, safety can be ensured at all times, making it suitable for use as scaffolding at construction sites.

As described above, the present invention has been able to provide a useful and practical ring-shaped clamp that can securely fix pipes and the like and prevent loosening after fixing.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention; Figure 1 is a front view, Figure 2 is a plan view, and Figure 3 is a front view of Figure 1 in an open state. It is. FIGS. 4 and 5 are perspective views showing conventional examples. FIG. 6 shows a perspective view of a special tool used for the annular clamp. 4...Right toggle link, 5...Left toggle link.

Claims (1)

[Claims for Utility Model Registration] A clamp for winding and locking a workpiece,
A plurality of clamping pieces having a partial ring shape and jointly forming a ring shape, a pin parallel to the axis of the ring that connects these clamping pieces by rotatably locking them, and a jointed clamping piece. In a ring-shaped clamp consisting of a fastening mechanism that draws both ends of the pieces together and tightens them using a toggle mechanism, the fastening mechanism includes a right toggle link 4 and a pin 9 that pivotally supports the right toggle link 4 and the clamping piece. ,9 and
It is equipped with a left toggle link 5 and a tool 10 for rotating the right toggle link 4, one end of the right toggle link 4 is pivotally supported on the right end of the clamping piece 1 by pins 9, and the other end is equipped with a tool 10. 10
A pressing operation part 4a that is locked to and pressed in the rotational direction
The right toggle link 4 is rotated in the vertical direction by the pressing operation part 4a, and the pins 9, 9 are provided with a tool locking part 9b that locks with the tool 10, the tool 10 is constructed separately from the right toggle link 4, and has a handle portion 100 at one end and a locking portion 110 that is locked to the right toggle link 4 at the other end. The stop portion 110 is a protrusion 11 that is locked with the pressing operation portion 4a of the right toggle link 4.
2 and a pawl 111 that is locked with the tool locking portions 9b of the pins 9, 9, the left part of the left toggle link 5 is locked with the left end of the clamping piece 1, and the right end is locked with the tool locking part 9b of the right toggle link 4. It is pivotally supported near the pressing operation part 4a, and the pressing operation part 4a of the right toggle link 4 and the pin 9,
By rotating the tool 1 that is locked to the tool locking portion 9b of 9, the right toggle link 4 and the left toggle link 5 form a toggle mechanism to draw both ends of the clamping piece 1 toward each other and tighten them. Also, a ring-shaped clamp characterized by being able to be unfastened.