JP2567278Y2 - Frame connection device for picture frame - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a device for connecting frames in a light metal or plastic picture frame.

Conventionally, a frame connecting device of this type is provided with a dovetail groove into which an L-shaped connecting bracket is inserted, and in order to connect the vertical and horizontal frames to each other, both insertion pieces of the connecting bracket are connected to both frames. It is fixed in the dovetail. As means for fixing the connection fitting to the frame, various means are employed as follows.

First, a screw is often used (in this embodiment of the present invention, a part is screwed, see FIG. 2). There is also a method of driving the insertion piece of the connection fitting like a wedge. In this case, claws are formed on both sides of the insertion piece. Further, there is a method in which an eccentric cam is formed on the lever, the eccentric cam is pivotally supported on the insertion piece, and the insertion piece is pressed against the inner peripheral surface of the dovetail groove by the eccentric cam.

[0004]

[Problems to be Solved by the Invention] Among the conventional frame connecting devices in a frame, when using a screw, when assembling or disassembling the frame for putting in and taking out the work, it is troublesome to turn a screw with a screwdriver. Is required. Moreover, since the force of the screw does not act in the longitudinal direction of the frame, there is a problem that the vertical and horizontal frames are difficult to adhere accurately. Further, in the case of a form driven in like a wedge, there is a problem that it cannot be removed.

In the lever operation, the eccentric cam acts only two-dimensionally in the width direction and the longitudinal direction of the frame, and according to the operation, the insertion piece of the connecting fitting is pressed against the inner surface of the dovetail groove of the frame. At the same time, the frame is pressed against the other connecting frame, and when viewed from the connecting end face, only the pressure contact between the end faces and the accuracy of the butting in one width direction can be obtained. There is a problem that the accuracy of the frame cannot be obtained, and a discrepancy occurs between the two frames in that direction.

[0006] In view of the above situation,
By the action of the eccentric cam by the lever operation, a three-dimensional action of press-contact and accuracy in both the longitudinal and lateral directions can be obtained at the abutting end face of the frame, so that the frame is connected to the frame at which the frame can be accurately and strongly connected. The aim was to provide a device.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to forming a dovetail groove into which an L-shaped connecting metal fitting is inserted in a frame, and an opening in which the dovetail groove is opened. A dovetail groove is formed, a slope facing the mouth dovetail groove is formed on both protruding ridges projecting opposite to the opening of the back dovetail groove, and at least one insertion piece is provided on the connection fitting. About the lever, the lever is pivotally supported at the center of the width, the lever has a base shaft protruding laterally at the base end, and a substantially elliptical truncated cone-shaped eccentric cam that fits in the dovetail groove at the tip of the base shaft is formed. At the center of the cam, a support shaft for the shaft support is protruded, and as for the eccentric cam, a claw portion is protruded at one of both ends in the long diameter direction, and both ends of the eccentric cam are operated by inverting the lever. Are pressed against the both sides of the dovetail groove to drive the frame to the other connecting frame side with the pawls. Slope is configured so as to press on the slopes of both ridges.

[0009]

Since the frame connecting device for the frame is constructed as described above, when assembling the frame, one of the inserts of the connecting fitting is fixed to the frame in advance by means of the present invention or other means.

After the connecting bracket is attached to one frame in this way by any means, the insertion piece with lever is inserted into the deep dovetail groove of the other frame. Then, since the eccentric cam is inserted into the mouth dovetail groove, when the lever is turned down with the end faces of the vertical and horizontal frames abutting,
The following actions are completed at the same time.

1) The claw of the eccentric cam drives the frame in the direction of another frame, and as a result, both end surfaces of the vertical and horizontal frames are pressed against each other.

2) Both ends in the major diameter direction of the eccentric cam are pressed against the inner surfaces on both sides of the dovetail groove. Further, the eccentric cam is sandwiched between the slopes of the two ridges by the elliptical cone slope. As a result, in the width direction orthogonal to the axial direction of the support shaft of the eccentric cam, both end surfaces of the vertical and horizontal frames exactly match.

[0013] 3) Since the elliptical inclined surface of the eccentric cam is pressed against the inclined surfaces of the two ridges, the insertion piece is attracted and pressed against the two ridges. As a result, the end faces of the vertical and horizontal frames exactly match in the axial width direction of the support shaft of the eccentric cam.

When the frame is disassembled, when the lever is lifted, the states from 1) to 3) are released at once. It should be noted that even if one of the inserts of the connecting fitting is always fixed to the frame, there is no problem in removing the frame and taking in and out the work.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 to 6 show an embodiment, in which the vertical and horizontal frames 1 and 3 are connected by an L with a lever 7.
A letter-shaped connection fitting 5 is used.

The frames 1, 3 are located at the rear half of the frame G, and a pair of projecting pieces 11,
By projecting 11, a dovetail groove 13 and a dovetail groove 15 are formed therebetween. As for its formation, ridges 17, 17 are provided on the inner surfaces of the two protruding pieces 11, 11, and protruding edges 19, 19 are provided on the front ends thereof so as to face each other. Also,
A protrusion 21 for reinforcement is formed on the bottom surface of the dovetail groove 13.

A slope 23 is formed on each of the projections 17 and 17 from the tip to near the base, facing the dovetail groove 15. However, it may be formed up to the base end (FIGS. 8 and 9). Further, although the tip has an acute-angled cross section, this is not always necessary, and a tip surface may be formed.

The connecting fitting 5 is bent at a right angle to the width so that it can be inserted into the deep dovetail grooves 13 of the vertical and horizontal frames 1, 3. It is supported at the center of the width. 27 is a shaft support hole.

Further, a pair of screw holes 29, 29 are provided at both ends of both the insertion pieces 25, 26, and the insertion piece 26 without the lever 7 is fixed to the horizontal frame 3 by screws 31, 31. As for the fixing, since the screws 31, 31 are pressed against the raised portion 21, the insertion piece 26 is
7 and 17 are pressed against each other. The other insertion piece 25 is pressed against the ridges 17, 17 by operating the lever 7.

The lever 7 has a base shaft 33 protruding at a right angle at the base end and a knob 35 formed at the front end. And the base shaft 33
The eccentric cam 37 is formed at the tip of the eccentric cam 37, and a support shaft 38 that fits in the shaft support hole 27 is protruded at the center of the tip of the eccentric cam 37, and is attached so as not to come off with the support shaft 38.

The eccentric cam 37 has a truncated elliptical cone shape, and has an elliptical cone slope 39 formed so that the diameter of the ellipse becomes smaller as it goes from the base end to the tip end. Then, at both ends in the large-diameter direction, the oval cone slopes 39 are formed by the slopes 23, 23 of the ridges 17, 17, respectively.
The insertion piece 25 is pressed against
17 and a lateral accuracy is obtained at the butt end face.

The eccentric cam 37 is also formed so as to be pressed against both side surfaces of the dovetail groove 15 in the large-diameter direction, and a claw portion 41 is protruded from the operation side end of the lever 7. The claw part 41
Are formed in the shape of protrusions that bite into the frame 1.

FIG. 4 illustrates the effect of the operation of the lever 7 on the frame 1 in the large-diameter direction of the eccentric cam 37, and FIG. 5 illustrates the effect on the elliptical cone 39.

In the large-diameter direction (FIG. 4), first, the claw 41 at the lower end and the upper end contact the inner surface of the dovetail groove 15 (FIG. 4A), and gradually press-contact, so that the claw 41 comes into contact with the inner surface. By biting, the frame 1 is driven in the direction of the other frame 3 (b), and when the pressing in the large-diameter direction is completed (c), the vertical and horizontal frames 1 and 3 are pressed against the end faces and simultaneously in the vertical width direction. Matches.

Regarding the operation of the elliptical cone slope 39 (FIG. 5),
At both ends, the elliptical cone slope 39 is pressed against the slopes 23, 23 of the ridges 17, 17 (in the order of A, B, C), so that the insertion piece 25 is set in the vertical position and the ridge is formed. 17 and 17 are brought into pressure contact with each other, whereby the abutment surfaces are accurately matched in the longitudinal and width directions.

FIG. 7 shows another embodiment of the eccentric cam 37, in which the cut surface 43,
By forming 45, a shape close to an elliptical truncated cone, that is, a substantially elliptical truncated cone, is formed, and the elliptical cone slope 39 is stepped in the circumferential direction. Shape. Also, in this case, the drive projection 41 is at both ends.
Are formed by the eccentricity of the difference in shape. In other words, the two-dot chain line
The position indicated by indicates a symmetrical shape with respect to the other end.

FIGS. 8 and 9 show frames 1 and 2, respectively.
3 shows another embodiment of the present invention.
The difference is that the opening direction of the mouth dovetail groove 15 differs.

[0029]

As described above, according to the present invention, the following excellent effects can be obtained.

1) A three-dimensional effect is obtained that the butted end faces of the vertical and horizontal frames are pressed against each other, and that the butted end faces are accurately matched in both the vertical and horizontal width directions. Therefore, not only the vertical and horizontal frames are strongly connected, but also the accuracy of the connection is ensured over the entire circumference of the butt.

2) Regarding the connection strength, since the eccentric cam is pressed against the frame not only at both ends but also at the elliptical slope, a very strong connection between the vertical and horizontal frames can be obtained.

3) By one-touch operation using a lever,
Connection and disconnection of frames can be achieved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a frame showing one embodiment.

FIG. 2 is a cross-sectional view of a main part showing an assembled state of a frame according to the embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an explanatory view showing the movement of the eccentric cam accompanying the lever inversion operation in the longitudinal section of the frame in the order of (A) to (C).

FIG. 5 is an explanatory view showing the movement of the eccentric cam accompanying the lever inversion operation in the order of (a) to (c) in the cross section of the frame.

FIG. 6 is an explanatory plan view of the eccentric cam.

FIG. 7 is an explanatory plan view corresponding to FIG. 6, showing another embodiment of the eccentric cam.

FIG. 8 is a sectional view corresponding to FIG. 3, showing another embodiment.

FIG. 9 is a sectional view corresponding to FIG. 3, showing another embodiment.

[Explanation of symbols]

 1, 3 frame 5 connecting bracket 7 lever 13 deep dovetail groove 15 mouth dovetail groove 17 ridge 23 slope 25, 26 insertion piece 33 base shaft 37 eccentric cam 38 support shaft 39 oval cone slope 41 claw

Claims (3)

(57) [Scope of request for utility model registration] 1. A dovetail groove in which an L-shaped connecting metal fitting is inserted is formed in a frame, and a dovetail groove is formed to open the dovetail groove. The projecting ridges have slopes facing the dovetail groove, and the connecting bracket has at least one of the inserts that supports the lever at the center of the width. A base shaft is protruded in the lateral direction at the portion, a substantially elliptical frustum-shaped eccentric cam that fits in the mouth dovetail groove is formed at the tip of the base shaft, and a support shaft for the bearing is protruded at the center of the eccentric cam, As for the eccentric cam, a claw is protruded at one of both ends in the long diameter direction, and the both ends of the eccentric cam are pressed against the both side surfaces of the dovetail groove by the inversion operation of the lever, and the claw portion is used for the frame. Is driven to the other connecting frame side, and at the same time, the oval cone slope is configured to press against the slopes of both ridges. Frame connecting device in the picture frame. 2. A protruding member having a claw portion having a protruding shape.
Claim 1 Frame connecting device in picture frame. 3. The claw portion is formed by eccentricity of different shape at both ends.
Specially 2. The frame according to claim 1,
Linking device.