JPH052298Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a clamping device, and particularly to the structure of an exhaust pipe clamping device used for automobile engine inspection.

(Prior Art) As is well known, engines that have been assembled are inspected for operating characteristics.

Since such inspections are normally performed before mounting on the vehicle body, exhaust pipes with mufflers are not equipped, so for the inspection line, exhaust pipes that match the specifications should be selected. The conventional method is to connect it to the exhaust part of the engine.

In order to connect such an exhaust part, conventionally, a method has been adopted in which an engine-side exhaust pipe and an exhaust pipe used in an inspection line having a muffler are sandwiched by flanges formed on each of the exhaust pipes.

That is, as shown in FIG. 3, a toggle mechanism is used, and the flanges of each exhaust pipe are held in a state where the maximum pressing force in the toggle mechanism is obtained.

(Problem to be solved by the invention) By the way, in the case of a toggle mechanism, the applied force generally weakens except at the position where the force is multiplied, that is, when the lever is at the dead center position. Therefore, when performing clamping, a structure is required to keep the force relationship between the clamping members constant at all times.

In view of this problem, in the past, an elastic material such as thick rubber was provided on the clamping surface of the clamp device to bias the lever of the toggle mechanism so that it did not exceed the dead center position. Ta.

However, even if such measures are taken, the biasing force of the toggle mechanism against the lever in the clamped position may weaken due to deterioration of the rubber, etc., and as a result, it is not possible to effectively utilize the advantages of the toggle mechanism. There was a problem that the exhaust pipes could not be connected properly.

SUMMARY OF THE PRESENT DISCLOSURE In view of the problems inherent in conventional clamp devices, an object of the present invention is to provide a clamp device that constantly applies a strong pressure to the clamp position, thereby enabling a firm clamping effect.

To achieve this objective, the present invention provides a driven member pivotably connected at each end of a pressing arm for pressing a member to be clamped and an operating member that is displaced into a clamped position and an unclamped position. In contrast, when the operating member is in the clamp position, the pressing arm is biased to be displaced in the pressing direction.

(Function) According to the present invention, the pivoting portion of the operating member in the clamping position supports the driven member pivotally connected between the operating member and the pressing arm for clamping, when the pressing arm is clamped. Forced in a direction that pressurizes the member.

(Embodiment) Hereinafter, details of an embodiment of the present invention will be explained with reference to FIGS. 1 and 2.

FIG. 1 is a front view showing a clamping state of a clamping device according to an embodiment of the present invention.

In the same figure, a clamp device 1 is a member to be clamped, in this embodiment, an exhaust pipe of an engine.
A pedestal having a base 1A having a mounting surface on which the flange F of the exhaust pipe CP having the muffler M in the EP and inspection line is placed, and standing upright on the opposite side of the position of the base 1A where the member to be clamped is placed. 1
B is fixed.

Near the upper end of this pedestal 1B, there is provided a swingable pressing arm 1C whose base is pivotally connected via a support shaft 2. In this embodiment, the free end of this pressing arm 1C is connected to the engine. It extends above the stud bolt SB fixed to the exhaust pipe EP.

On the other hand, on the back side of the mounting surface of the base 1A,
In the vicinity of B, a support member 1D that stands upright downward in the figure is inserted through a nut 3 into a support hole of the base 1A and is attached.

This support member 1D has a lower longitudinal end portion formed to have a larger diameter than the other portion, and a floating member 1E is inserted into the small diameter portion.

The floating member 1E is movable in the longitudinal direction of the support member 1D between the base 1A and the large diameter portion of the support member 1D at the small diameter portion of the support member 1D.
The base 1A is normally biased away from the back surface of the base 1A by a compression spring 4 inserted between the back surface of the base 1A and the upper surface opposite to the back surface.

As will be made clear later, this compression spring 4 is a biasing member that displaces the pivot position of the operating member in the clamped state so that the free end of the pressing arm 1C presses the clamping member.

A base portion of a swingable operating member 1F is pivotally mounted via a pin 5 at a symmetrical position on the outer periphery of the floating member 1E.

That is, the operating member 1F has an operating handle 1f at its free end, and with the pin 5 as a fulcrum, the pressing arm 1C is in a clamping position corresponding to the clamping member as shown in FIG. 1, and as shown in FIG. As shown, the pressing arm 1C is displaced to a clamp release position in which it no longer corresponds to the clamped member.

A pin 6 is fixed near the base of the operating handle 1f of the operating member 1F, and this pin 6 and a bolt 7 attached to the side surface of the pedestal 1B corresponding to the side from which this pin 6 protrudes. A tension spring 8 is hung between them.

That is, this tension spring 8 is the operating member 1F.
is provided to be held in the clamped position and the unclamped position by a click action using the pin 5 as a fulcrum.

Therefore, during the swinging process, the operating member 1F is held at a position beyond the dead center relative to the tension spring 8, specifically in the clamped position shown in the first figure and the unclamped position shown in the second figure. Ru.

On the other hand, each longitudinal end of the driven member 1G is pivotally connected to the operating member 1F and the pressing arm 1C via pins 9 and 10.

This driven member 1G displaces the pressing arm 1C between a position where its free end corresponds to the clamped member and a position where it no longer corresponds, in accordance with the swinging position of the operating member 1F. As shown in , the pivot positions of each end are set so that when the operating member 1F is in the clamped position, it is maintained in a state parallel to the longitudinal direction of the support member 1D.

Since this embodiment has the above-described structure, when clamping an exhaust pipe, the exhaust pipe on the inspection line side, which has been inserted into the base 1A and whose flange F is fixed on the mounting surface, must be clamped. Make CP correspond to engine E's exhaust pipe EP.

At this time, the operating member 1F is displaced to the release position as shown in the second diagram, and as a result, the pivoting position of the pressing arm 1C on the operating member 1F side of the driven member 1G is displaced. The free end is swung away from the clamped position through the
It is held by the bias of the tension spring 8.

Then, insert the stud bolt SB attached to the flange F of the engine exhaust pipe EP into the flange F of the exhaust pipe CP on the inspection line side to position the exhaust pipes, and then move the operating member 1F to the second
The position shown in the figure is rotated clockwise to the clamp position shown in the first figure.

In this state, the pressing arm 1C
Through the displacement of the pivot position of G on the operating member 1F side, the free end is brought into contact with the head of the stud bolt SB and held down.

The floating member 1D in the clamped state is the compression spring 4
As shown in the figure, the actuation member 1F, whose base is pivotally connected to the floating member 1E, receives the downward movement tendency. Therefore, the behavior of the operating member 1F also gives the driven member 1G a tendency to move downward, so that the free end of the pressing arm 1C to which the driven member 1G is pivoted is pressed by the stud bolt SB. It is biased in the direction of being lowered.

As a result, by pressing the stud bolt SB, the flanges of the exhaust pipes are brought into close contact with each other, completing the connection of the exhaust pipes.

According to this embodiment, the floating member 1G is the compression spring 4
Since it is urged in the direction away from the base 1A by the presser arm 1A, it is possible to promote the displacement of the free end of the presser arm 1C during clamping, thereby eliminating variations in the thickness of the flanges being clamped. Firm pressure can be applied even when there is a problem.

(Effect of the invention) As is clear from the above explanation, according to the invention, when the operating member is in the clamp position, the pressing arm extending to the clamp position is directed away from the base, in other words. The free end of the pressing arm is biased along the direction in which it swings toward the clamping position, and the member to be clamped is set in a state where it is easy to press, so that a strong pressing force is always applied. Pressure can be applied toward the base, and as a result, the member located between the base and the pressing arm can be securely and easily clamped.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the clamping state of the clamping device according to the embodiment of the present invention, FIG. 2 is a front view showing the clamping state of the clamping device according to the embodiment of the present invention, and FIG. 3 is an example of the conventional clamping device. FIG. 1... Clamp device, 1A... Base, 1B...
Frame, 1C...Press arm, 1D...Support member, 1E
...Floating member, 1F...Operation member, 1G...Followed member, 4...Compression spring, 8...Tension spring.

Claims (1)

[Claims for Utility Model Registration] A base having a mounting surface for a member to be clamped, and a base pivotably attached to a pedestal fixed to a part of the mounting surface of the base, a swingable pressing arm that extends to the clamp position; a support member that stands upright from a position away from the pedestal on the back side of the mounting surface of the base; A floating member that is movable in the longitudinal direction of the support member and is normally biased away from the base; and a base that is pivoted at a symmetrical position on the outer periphery of the floating member; An operating member that can be swung in a direction to displace between a clamp release position and a clamp release position; an elastic body that holds the member in the clamped position and the unclamped position, one end of which is pivoted in the same plane as the pivoted position of the operating member, and the other end of which is pivoted near the free end of the pressing arm. a driven member which is attached to the support member and maintains a state parallel to the longitudinal direction of the support member when the operating member is in the clamped position.