JPH0629523Y2 - Clamp structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention mounts a curved plate spring-shaped clamp member on a support member, pressurizes and extends the clamp member, and presses the held member against the support member at its working edge. The present invention relates to a clamp structure for holding.

[0002]

2. Description of the Related Art Conventionally, in this type of clamp structure,
For example, there are those shown in FIGS. This clamp structure has a curved plate spring-like clamp member 1.
A pair of U-shaped arm portions 2 for deformation are integrally provided at one end of
Further, a slightly laterally long hole 3 is provided in the center, and the clamp member 1 is mounted on the plate-shaped support member 5 with the screw 4 passing through the hole 3, and between the clamp member 1 and the support member 5. A bending gap δ is formed, and the base end edge 1a of the clamp member 1 is fitted and fixed in the fixing hole 6 of the support member 5. The support member 5 is provided with a set hole 8 that is sufficiently larger than the held member 7 to be held.

In such a clamp structure, the held member 7 is set in the set hole 8, the screw 4 is tightened to press the clamp member 1 with a pressing force f, and the gap δ is reduced to reduce the clamp member. 1 is extended, and the gripped member 7 is pressed against the side edge of the set hole 8 by its working edge 1b to sandwich it.

Further, among conventional clamp structures, FIG.
As shown in FIG. 3, the clamp member 1 is superposed on the mounting surface 5a of the support member 5 by its curvature so that the central portion 1c floats, and the mounting surface 5a is passed through the hole 3 of the central portion 1c through the pressurizing screw 4. There is also one in which the clamp member 1 is extended by screwing it into a member (not shown), and is sandwiched between the clamp member 1 and the flange 5b of the support member 5 to fix the held member 7. (See Jitsukai Sho 54-44863)

[0005]

However, in the conventional clamp structure shown in FIGS. 5 to 7, with respect to the distance L ₁ between the held member 7 and the fixed point of the base end edge 1a of the clamp member 1, The length L ₂ between the base edge 1a and the working edge 1b of the clamp member 1 is short when the clamp member 1 is not pressed,
When the pressure is applied, the held member 7 cannot be set and cannot be held unless it becomes long.

Further, since the clamped member 7 cannot be removed unless the clamp member 1 returns to the initial state when the screw 4 is loosened, the stress of the clamp member 1 when it is pressed needs to be within the elastic limit. is there. Therefore, although the arm portions 2 are provided as the deformable portions, since these arm portions 2 also need to be deformed within the elastic limit, the size of the clamp member 1 is inevitably increased, and the mounting space is inevitably increased. -Not only is it difficult to use in a narrow space, but also the member to be held 7
It was troublesome to install and remove the.

Furthermore, the set hole 8 is provided with a member 7 to be held.
Since the size is large enough to easily attach and detach, the arm 2 has a drawback that the arm 2 exceeds the maximum bending stress and is damaged when a large external force F is applied to the held member 7 during wheel transfer or the like. there were.

On the other hand, the conventional clamp structure shown in FIG.
Similarly, since the held member 7 is held or released only by elastic deformation, the held member 7 can be attached and detached.
I could not afford to remove it,
Difficult to remove.

Further, there is a drawback that the amount of elastic deformation of the clamp member 1 must be increased inevitably, and the clamp member 1 becomes large in size and occupies a large space.

In view of such drawbacks of the prior art, the object of the present invention is not only easy attachment / detachment of a member to be held but also downsizing and sufficient clamping force to withstand a large external force. To provide.

[0011]

[Means for Solving the Problems] To achieve this purpose,
The clamp structure of the present invention has a mounting surface having a screw hole on the support member 13 and a set hole 16 provided on one side of the mounting surface, as in the embodiment shown in FIGS. The clamped member holding portion and the fixed protrusion 14 provided on the other side of the mounting surface are provided, while the curved leaf spring-shaped clamp member 10 has a central portion having a hole 11 and a circle centered on the hole 11. An arc-shaped base edge 10a and a cam-shaped action edge 10b that increases the distance from the hole 11 in the circumferential direction are provided, and the clamp member 10 is centered on the mounting surface of the support member 13 by its curvature. When the parts are floated and overlapped, they are lightly screwed into the screw holes of the mounting surface through the holes 11 of the clamp member 10, and then the clamp member 1
0 is rotated, the base end edge 10a is received by the fixed projection 14, and the working end edge 10b is sandwiched between the support member 13 and the holding member 15 of the holding member holding portion is temporarily pressed. After that, the pressurizing screw 12 for fixing the held member 15 by strongly screwing and extending the clamp member 10 is provided.

[0012]

Then, the clamp member 10 is superposed on the mounting surface of the support member 13 so that the central portion of the clamp member 10 is floated due to its curvature. Then, the pressing screw 12 is passed through the hole 11 of the clamp member 10 and lightly screwed into the screw hole of the mounting surface. Then, the clamp member 10 is rotated and its proximal end edge 10a is rotated.
Is received by the fixed protrusion 14 of the support member 13, and the working edge 10b
Then, it is sandwiched between the support member 13 and the held member 15 of the held member holding portion is temporarily pressed. Then, pressurizing screw 12
Is strongly screwed in and the clamp member 10 is extended to fix the held member 15.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view showing a clamp structure according to the present invention in a non-holding state, FIG. 2 is a plan view showing the clamp structure in a temporary holding state, FIG. 3 is a sectional view of the same, and FIG. 4 is an enlarged plan view showing a shape of a clamp member. .

The clamp member 10 is made by bending one plate member so that the upper surface side bulges and retains elasticity in the plate thickness direction. A circular hole 11 is provided in the center of the clamp member 10. And the clamp member 10 is
The support member 13 is overlapped with the mounting surface of the support member 13 so that the center portion of the support member 13 is floated by the curvature, and the pressurizing screw 12 is inserted into the hole 11.
It is lightly screwed into the threaded hole of the mounting surface through, and is rotatably mounted on the mounting surface of the support member 13 by the screw 12, and a bending gap δ is formed between the mounting surface and the mounting surface.

The base edge 10a of the clamp member 10 is
An arc having a radius r ₁ is formed from the center O of the hole 11, and the working edge 10b on the opposite side is cam-shaped. That is, one side portion 10c from the point A of the working edge 10b to one end
Is also an arc of radius r ₁ from the center O, the middle part,
That is, in the range 10d from the point A to the point B, the center O is X
A point O'decentered by a distance a in the axial direction and a distance b in the Y-axis direction.
Forming a circular arc having a radius r ₂ centered at, and extending from point B to the other end is a locking projection 10e.

The support member 13 is provided with a fixing projection 14 for receiving the base end edge 10a of the clamp member 10 on one side of a mounting surface having a screw hole, for example, by half blanking, and the mounting surface thereof. On the other side, a set hole 16 for setting the held member 15 is provided.

In such a structure, after the held member 15 is set in the setting hole 16, the clamp member 10 is rotated clockwise from the state of FIG. 1 as shown in FIG. The portion 10d is engaged with the held member 15 and the held member 15 and the base end edge 10 of the clamp member 10 are engaged.
The difference (L ₁ −) between the distance L ₁ between the fixed point a and the length L ₂ between the base edge 10 a and the working edge 10 b of the clamp member 10.
L ₂ ) is temporarily pressed when it disappears, and after the temporary pressing, it is strongly screwed in to tighten the pressurizing screw 12, the gap δ is reduced, and the clamp member 10 is extended. It can be pressed against the side edge and pinched.
Further, the locking protrusion 10e can prevent the clamp member 10 and the held member 15 from coming off.

In this case, the pressurizing force f may be arbitrarily set in consideration of the bending gap δ, the plate thickness t of the clamp member 10, etc., within a range not exceeding its elastic limit. Note that point B is L
L ₂ ≧ L ₁ m to a maximum value L ₁ max of variation allowed for ₁
It is set to have an ax relationship.

According to such a sandwiching mode, since the clamp member 10 has a large secondary moment of cross section against the external force F, it is not easily plastically deformed or fractured.

Further, as shown in the drawing, the clamp member 10 is
When the pressing screw 12 is a right-hand screw when it is rotated clockwise so as to eliminate the above difference (L ₁ -L ₂ ), the screw 12 is rotated right without the clamp member 10 being intentionally rotated. The clamp member 10 can be rotated clockwise by the friction between the head and the clamp member 10 by rotating the screw 12 and the screw 12 can be rotated counterclockwise by loosening the screw 12 by rotating the screw 12 counterclockwise. Since it can be detached from the held member 15 by doing so, the labor of rotating the clamp member 10 can be saved. When the shape of the clamp member 10 is reversed, the pressing screw 12 may be a left screw.

[0021]

As described above, the clamp structure according to the present invention is not only easy to attach and detach the member to be held, but also can be made compact and can be used with a small attachment space, and a large external force due to dropping or the like. It can withstand.

[Brief description of drawings]

FIG. 1 is a plan view showing a clamp structure according to the present invention in a non-held state.

FIG. 2 is a plan view showing it in a temporarily pressed state.

FIG. 3 is a sectional view thereof.

FIG. 4 is an enlarged plan view illustrating the shape of the clamp member.

FIG. 5 is a plan view showing a conventional clamp structure.

FIG. 6 is a sectional view thereof.

FIG. 7 is a plan view of the clamp member.

FIG. 8 is a cross-sectional view showing another conventional clamp structure.

[Explanation of symbols]

 10 Clamping Member 10a Base End Edge 10b Working End Edge 11 Hole 12 Pressing Screw 13 Supporting Member 14 Fixed Projection 15 Clamping Member 16 Set Hole (Clamping Member Holding Portion)

Claims (1)

[Scope of utility model registration request] 1. A mounting surface having a screw hole on a support member,
The clamped member holding portion provided on one side of the mounting surface and the fixed protrusion provided on the other side of the mounting surface are provided, while the bent plate spring-shaped clamp member has a central portion having a hole and the hole. Is provided as a center, and a base end edge having an arcuate shape, and a cam-shaped working edge whose distance from the hole increases in the circumferential direction, and the clamp member is attached to the mounting surface of the support member by a curved central portion. When they are floated and superposed, they are lightly screwed into the screw holes of the mounting surface through the holes of the clamp member, and then the clamp member is rotated to receive the base end edge by the fixing protrusion and to the working end. A pressing screw that fixes the held member by stretching the clamp member by tightly screwing the held member of the held member holding portion by temporarily holding the held member by sandwiching it with the support member at an edge. Equipped with That, clamp structure.