JPH0132921Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an L-shaped connecting plate that connects vertical and horizontal frame bones of a picture frame.

Prior Art When connecting the vertical and horizontal frame bones of a picture frame using an L-shaped connecting plate, it is common to form a connecting groove with a narrow opening in the frame and insert the insertion piece of the connecting plate into the connecting groove. It is true. However, there are various methods for fixing the connecting plate to the frame bone, such as driving an insertion piece of the connecting plate into the connecting groove of the frame bone like a wedge;
There are those that are fastened using screws, and those that have claws on the connecting plate that bite into the inner wall of the connecting groove.

Among these, in the case where a connecting plate is provided with a claw that bites into the inner wall of the connecting groove, as shown in Japanese Utility Model Application No. 48-99395, both insert pieces of the connecting plate have a height that increases toward the center of the width. There is a device in which a curved portion is provided, and the claws on both sides of the insertion piece are made to bite into the inner surface of the connecting groove by striking the curved portion and extending it. However, the curved portion of the prior art described above is not configured to be easily pushed out, so it must be pushed out by hitting.
The hammering process required skill and was troublesome, and the impact caused by the hammering resulted in a lack of accuracy in connecting the frame bones.

Furthermore, in the prior art described above, when the claws bite into the inner surface of the connecting groove, the connection between the connecting plate and the frame bone is completed, so even if the cut end surfaces of the vertical and horizontal frame bones are not in close contact with each other, It will no longer be possible to correct it. Furthermore, if the claw is a non-return claw that catches the inserted piece in the direction in which it comes out, it will bite into the inner surface of the connecting groove and cause the inserted piece to come out of the connecting groove, albeit slightly. Another drawback was that the adhesion between the end faces was likely to be incomplete.

Purpose of the invention This invention solves the above-mentioned drawbacks. It is possible to crush the curved part (in this invention, an arch-shaped punched piece) without using the method of hammering, and it is possible to insert it by crushing it. When the piece is deformed, the frame bone is slightly drawn toward the cut end surface thereof, and the purpose is to enable the vertical and horizontal frame bones to be brought into pressure contact with the cut end surface by this drawing.

Structure of the invention In other words, the structure of the present invention to achieve the above object is that, in an L-shaped connecting plate consisting of both insertion pieces that fit into the connecting grooves of the vertical and horizontal frame bones, the width center part of the insertion piece is straight on both sides of the width. At the same time, an arch-shaped punched piece is formed which is separated by a cut edge and connected at both ends in the longitudinal direction and protrudes into the width opening of the connecting groove. A forked part is formed that expands and deforms as if it is scraped in the left and right direction when it hangs on the fork, and a hole is provided on both sides of the base of the forked part to enable the forked part to expand and deform. A shallow notch is provided, and claws are provided on each outer side surface of both leg pieces of the forked portion to bite into the inner surface of the connecting groove as the forked portion expands.

Embodiment FIGS. 1 to 3 show an embodiment of this invention.

(Structure) Fig. 1 is a partial perspective view of the picture frame before assembly, and shows the connecting plate P of this invention in the relationship between the vertical frame bones 1 and the horizontal frame bones 2. , 2 are formed with a connecting groove 4 into which the connecting plate P is inserted, and the width opening 5 of the connecting groove 4 is formed narrowly by projecting pieces 6 on both sides.

As shown in FIG. 1, the connecting plate P is formed into an L-shape by bending a band plate made of metal such as iron at right angles, and has both sides that fit into the connecting grooves 4, 4 of the vertical and horizontal frame frames 1, 2. It consists of insert pieces 3,3.

Both insertion pieces 3, 3 are provided with notches 7 at their tips to form two-pronged parts 8, and the respective outer side surfaces 30, 30 of both leg pieces 9, 9 of the two-pronged parts 8 are inserted in the direction of insertion into the connecting groove 4. In contrast, it is formed on an inclined surface with a clearance angle. By providing shallow notches 11, 11 on both sides of the base of the bifurcated portion 8, claws 12, 12 are formed at the rear end portions of the outer inclined surfaces 30, 30 using the inclined surfaces.

Further, a pair of left and right punching holes 13, 13 are provided between the notches 11, 11 on both sides, so that the side edges between the notch 11 and the punching holes 13 can easily be bent outward. In addition, the punched holes 13, 13 are inserted into both cut edges 15 of the punched piece 15.
a, 15a, and a pair of left and right punching holes 14, 14 are provided at the proximal ends of both cut edges 15a, 15a of the punched piece 15, and the space between the proximal punching hole 14 and the tip punching hole 13 is cut straight. ing. The two cut edges 15a, 15a are bent in an arch shape toward the inner corner side by press working, and the width of the bent punched piece 15 is the width of the connecting groove 4 of the frame ribs 1, 2.
It is formed to have a more protruding dimension.

Further, an inverted V-shaped punching hole 16 is provided slightly toward the proximal end of the punching piece 15, and a raised portion 17 that swells toward the inner corner is provided at the corner of the base end.

(Function) When connecting the vertical frame 1 and the horizontal frame 2, first insert the insertion pieces 3, 3 of the connecting plate P into the connecting grooves 4, 4 of the frame ribs 1, 2 as shown in Figures 1 and 2. Insert it from the end,
At this time, the punched piece 15 engages with and is guided by the width opening 5 of the connecting groove 4, thereby facilitating the insertion operation.

Next, when the arch-shaped punched piece 15 is crushed, it flattens out as shown in FIG. 3, and the central part of the fork 8 is pushed out in the distal direction, so that the leg pieces 9, 9 become as shown in FIG. The claws 1 are pushed open in the direction of the arrow γ shown in FIG.
2 and 12 press against and bite into the inner walls on both sides of the connecting grooves 4 and 4. Moreover, at that time, both leg pieces 9, 9 of the forked part 8
As the claws 12 and 12 dig in, the frame bones move back in the direction of the arrow α, albeit slightly, so that the cut end surfaces of the vertical and horizontal frame bones 1 and 2 meet each other. Pressure action occurs.

Furthermore, when the punched piece 15 is crushed, the lower ends 18 and 19 act as fulcrums, and the proximal and distal ends of the insertion piece 3 tend to lift in the direction of the arrow β. It comes into pressure contact with the bottom surface of the connecting groove 4. Furthermore, due to the lifting action of the base end, the raised portion 17 of that portion comes into pressure contact with the edge of the width opening 5 at its lower end. Therefore, also in this respect, the connection relationship between the connecting plate P and the frame ribs 1 and 2 is strengthened.

Further, the arch-shaped punched piece 15 has a shape that projects along the width opening 5 of the connecting groove 4, and the left and right edges 15a, 15a of the punched piece 15 are cut straight, and the left and right cut edges 15a, 15a are cut straight. Since a pair of left and right punching holes 13, 13 are provided at the tip, and shallow notches 11, 11 are provided on both sides of the base of the fork, the punching piece 15 can be easily crushed without having to be hit. The purpose and effects of the present invention can be achieved even with work that involves pushing things out.

Note that if the punched piece 15 is crushed too much, the punched hole 16 at the base end will be deformed to absorb the strain. Furthermore, since the punched hole 16 has an inverted V-shape or mountain shape toward the punched piece 15, the deformation caused by absorbing the strain results in an enlargement of the width in the same way as at the tip. As a result, the insertion piece 3 has the extraction hole 1
Both side surfaces come into pressure contact with the inner wall of the connecting groove 4 at the position of the 6 portion. Therefore, also at the proximal ends of the insertion pieces 3, 3, the connection relationship with the frame bones 1, 2 can be strengthened by the pressure contact effect due to the increased width.

Regarding the pressing position when crushing the punched piece 15, it is preferable to apply the pressing tool to the sloped surface slightly closer to the base end than the top of the arch shape. That is, when the punched piece 15 is pressed at this position, the insertion piece 3 is pushed forward due to the direction of its arched curvature, and a strong force is exerted to push the forked part 8 open, so that the claws 12, 12 effectively causes the frame bone to retreat.

Further, due to the above-described structure, there is no need to crush the punched piece 15 by the conventional crushing operation, and the above-mentioned functions and effects can be easily achieved by, for example, a screw-insertion method. .
Examples thereof are shown in FIGS. 4 and 5. In this case, a sub-groove 21 is provided above the connecting groove 4 in the frame bones 1 and 2, a rectangular female threaded piece 22 that is non-rotatably fitted into the sub-groove 21 is inserted, and the screw hole 22 of the female threaded piece 22 is inserted into the sub-groove 21. A male screw 24 is screwed into the hole, and the punched piece 15 is crushed by the screwing of the male screw 24.

In this way, in the present invention, the arch-shaped punched piece 15
Because it can be crushed without hitting it,
There is less impact at that time, and in this respect, the vertical and horizontal frame bones 1,
2 can be connected accurately.

Effects of the invention As explained above, in the connecting plate of the vertical and horizontal frame bones of the picture frame according to this invention, when the arch-shaped punched piece is crushed, the two prongs at the tip open and expand, and the claws of both leg pieces of the two prongs are connected. It not only bites into the inner surface of the groove and is strongly connected to the frame bone, but also causes the frame bone to be drawn toward the cut end surface, which allows the vertical and horizontal frame bones to be accurately aligned at the cut end surface. It has the remarkable effect of being able to be closely connected and maintain a solid and stable connection without wobbling.

Also, in order to ensure the expansion of the fork,
Since a punching hole connected to the tip of the cut edge of the punched piece is provided, the claw can reliably bite into the inner surface of the connecting groove.

Further, the arch-shaped punched piece has a shape that projects along the width opening of the connecting groove, and as described above, both left and right cut edges of the punched piece are cut straight, and a hole is drilled at the tip of the cut edge. Since a pair of left and right punching holes 13, 13 and shallow notches 11, 11 are provided on both sides of the base of the two prongs, crushing the punched piece is very easy, and there is no need for conventional crushing work. This is not the case at all, and the work is more like pushing and stretching the screws, which makes it possible to reliably cause the two-pronged portion to open and expand, thereby eliminating the impact caused by hitting as in the past.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of this invention, Figure 1 is a perspective view showing the connection plate of the picture frame according to this invention in relation to both the vertical and horizontal frame ribs, and Figure 2a is a punched-out view of the connection plate. Figure 2b is a cross-sectional view from the side showing the assembled state of the picture frame before the pieces are crushed; Figure 3a is a cross-sectional view of the frame seen from the back; Figure 3a is the assembled state of the picture frame after the punched pieces of the connecting plate are crushed. FIG. 3b is a sectional view seen from the back side of the same. Figures 4 and 5 are diagrams explaining the crushing operation of the punched piece 15 by the screw insertion method, Figure 4 is an exploded perspective view, and Figure 5 is a cross-sectional view of the assembled frame as seen from the back. It is. P...Connection plate, 1...Vertical frame bone, 2...Horizontal frame bone,
3... Insertion piece, 4... Connecting groove, 5... Width opening of the connecting groove, 6... Projecting piece, 7... Notch, 8... Bifurcated part, 9... Leg piece, 12... Nail, 13...Drilling, 1
5...Punching piece, 15a...Cut edge.

Claims (1)

[Scope of utility model registration request] L consisting of both insertion pieces that fit into the connecting grooves of the vertical and horizontal frame bones
In the letter-shaped connecting plate, the insertion piece has an arch-shaped punched piece whose width center part is cut off by straight cutting edges on both sides of the width, connected at both ends in the longitudinal direction, and projects into the width opening of the connecting groove, and A forked part is formed at the tip of the piece, and when a pressing force due to the crushing of the punched piece is applied to the center of the width, the forked part is deformed to open and expand in the left and right direction. An extraction hole is provided to connect to the tip of the cutting edge, shallow notches are provided on both sides of the base of the fork, and claws are provided on each outer side of both leg pieces of the fork to bite into the inner surface of the connecting groove when the fork opens and expands. A connecting plate for vertical and horizontal frame bones of a picture frame.