JPH0335180Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a back plate stopper for holding down the back plate of a picture frame.

[Conventional technology]

A rotating claw called a dragonfly is sometimes used as a back plate stopper to hold down the back plate of the picture frame.
The rotary claws did not work with picture frames where the back plate was deeply seated, and they also had the disadvantage of loosening during use. Another disadvantage is that a portion protrudes outward from the frame.

Therefore, as a back plate stopper that solves this drawback, for example, as shown in FIG. Knob part 1 in the center
A stopper A with a protruding portion 2 is provided (Utility Application No. 55-080712).

However, when removing this, there is a risk that it may suddenly pop out due to the elasticity of the leaf spring, and the rear wall of the picture frame to which this stopper A is used must have a specified width, so the rear wall of the picture frame has a narrow width. It was inappropriate.

Further, as shown in FIG. 8, it is an elastic metal plate formed in a V-shaped plate shape, and has hooking protrusions 13a and 13b at both ends, and a tongue piece 14 is protruded from a part of the plate. A back plate stopper B with screw holes is also provided (Utility Application No. 56-020317).

However, when removing such a stopper that utilizes the elastic force of a metal plate, there is a risk of it flying out due to the elastic force, and since this stopper B is screwed to the back plate, it may damage the back plate. There was also the drawback that it was difficult to use.

[Purpose of invention]

The present invention eliminates these shortcomings; the stopper itself does not need to be removed from the frame each time the back plate is inserted or removed, and the back plate pressing area is large, making the pressing stable and one-touch. The purpose of the present invention is to provide a back plate fastener for a picture frame that can be operated with the following operations.

[Structure of the idea]

To achieve the above object, the present invention has a structure that is a back plate stopper of a picture frame that is hung in a square-shaped sheath groove having a narrow opening inside the frame bone, and which has a band-shaped leaf spring curved in an arcuate shape. a main body, and foot pieces wider than the opening width of the sheath groove and removably hooked to the sheath groove are connected to the both ends thereof, and the hooks are detachably hooked to the opening of the sheath groove. The gist is that a retaining pawl is provided protrudingly, and the lower edge of the width of the strip of the strip-shaped leaf spring is made into a wide back plate pressing edge.

〔Example〕

1 to 4 show an embodiment of the present invention, and first, a frame F for using the fastener P according to the embodiment of the present invention will be explained.

The frame F has a substantially L-shaped cross section with a rear wall 2, an intermediate projecting wall 3, and a front wall 4 projecting inward from a side wall 1. Further, a rear projecting edge 5 is provided on the edge of the rear wall 2 to protrude toward the front surface, and a projecting rim 6 is provided toward the rear surface in opposition to the rear projecting edge 5 at approximately the middle of the intermediate projecting wall 3. A sheath groove 7 is formed between the rear protruding edge 5 and the protruding ridge 6 with a narrow opening 7a and a wide inner groove 7b with a T-shaped cross section turned sideways. The end of the intermediate projecting wall 3 and the front wall 4 are connected by an abutting wall 8. Note that the front wall portion that protrudes inward from the connecting point of the abutting wall 8 is referred to as a front protruding edge 9 for convenience.

On the other hand, the fastener P according to the embodiment of the present invention is mainly composed of a plate spring made of an elastic plastic band plate curved into an arcuate shape, and the center part of the plate spring is hooked to the rear edge 5 of the frame frame F. leg portions 21a, 2 on the left and right.
1b, foot pieces 22a, 22b, both foot pieces 2
2a, 22b are formed by being slightly warped, and the foot pieces 22a, 22b are provided with V-shaped notches 23a, 23b in the longitudinal direction.

In addition, the central latching portion K includes a narrow upper latching protrusion 24 that protrudes upward from the width of the strip, and a back plate pressing edge 25 that protrudes broadly downward. A hook-shaped hook-shaped hook 27 is provided at the middle of the back surface of the leaf spring and protrudes upward to face the upper hooking protrusion 24.
and is provided. And the upper latching protrusion 24
A groove 28 is formed between the latching pawl 27 and the latching pawl 27.

The groove width of this groove 28 is such that the thickness of the rear ridge 5 of the frame bone F is fitted, and the depth of the groove 28 is such that the rear ridge 5 is hooked by the upper latching protrusion 24 and the latching pawl 27. It is deep enough to stop.

Also, the outer surface of the latch claw 27 has a sheath groove 7 on both the upper and lower surfaces.
It is chamfered 29, 30 toward the latching claw 27.
It is formed so that it can be fitted into the sheath groove 7. Further, the thickness of the latch claw 27 must not be greater than the depth of the inner groove 7b of the sheath groove 7. This latching pawl 27 can be integrally formed when the leaf spring is molded from plastic.

Note that the protruding height of the upper retaining protrusion 24 is the same as that of the frame frame F.
The height may be such that it does not protrude from the outer surface (rear surface) of the rear wall 2, and its width (length) may be approximately the same as the width (length) of the latching claw 27.

The width (length) and thickness of the back plate pressing edge 25 are preferably as large as possible because the surface in contact with the back plate becomes larger. However, it is desirable that the thickness is such that it does not protrude inward from the tip of the intermediate projecting wall 3, that is, the abutting wall 8. Further, the height should be such that it comes into contact with the intermediate projecting wall 3 of the frame bone F. In particular, when the back plate pressing edge 25 is deformed so as to swell toward the front side of the frame, the pressure on the back plate 30 can be made even stronger.

Further, the width W of the leg portions 21a and 21b is formed to be narrower than the width D of the sheath groove 7 opening 7a.

On the other hand, the leg pieces 22a and 22b of this embodiment are
Notches 23a and 23b are provided so that the width of the foot piece can be freely compressed.

That is, when the notches 23a and 23b are compressed,
The foot pieces 22a, 22b can pass through the width D of the opening 7a of the sheath groove 7, and when the notches 23a, 23b are expanded into a V-shape within the inner groove 7b, the foot pieces 22
a, 22b are latched within the inner groove 7b and configured so that they will no longer come off the sheath groove.

FIG. 4 shows a cross-sectional view when the latch claw 27 of the stopper P is hooked to the rear ridge 5 of the frame bone F. It is sufficient that the wall thickness is within the range of .

5 and 6 show a second embodiment of the stopper P' of the present invention, but unlike the stopper P of the first embodiment, the leg portion of the stopper P' 22a,
Since notches 23a and 23b are not provided in 22b, the width of the foot pieces 22a and 22b is determined by adjusting the width of the sheath groove 7 opening 7.
It is necessary to form the width a to be larger than the width D and smaller than the width of the inner groove 7b, and to fit the stopper P' into the sheath groove 7 in advance when assembling the frame F.

[Effect]

When attaching the stopper P of the first embodiment to the frame F, first, the notches 23a of the foot pieces 22a, 22b,
23b is crushed and fitted into the sheath groove 7,
Next, when the center part of the leaf spring is pushed into the sheath groove 7, the inclined surface formed on the lower surface of the latch claw 27 slides into the inner groove 7b, and when the latch claw 27 is hooked on the rear flange 5, the stopper The curved portion of P will not protrude from the sheath groove 7. At this time, the lower end surface of the back plate pressing edge 25 is on the surface of the intermediate projecting wall 3. Then, after hanging the work and the back plate 30 on the front protruding edge 9 and inserting it so that its edge is in contact with the abutment wall 8, if you push down the upper hanging protrusion 24 part with your finger, the back plate pressing edge 25
The lower inclined surface of the latch claw 27 is connected to the intermediate projecting wall 3 and the inner groove 7.
At the same time, the latch claw 27 that had been hooked on the rear flange 5 comes off, and the arcuate portion of the leaf spring pops out from the frame bone F. As a result, the back plate pressing edge 25 of the stopper P comes into contact with the outer surface of the back plate 30, and the stopper P
Since the foot pieces 22a and 22b are still hooked to the sheath groove 7 and fixed to the sheath groove 7, the back plate 3
It is possible to prevent the value from being 0.

In addition, in the case of stopper P, the notch 23 of the foot piece
By using a and 23b, it can be freely inserted and removed from any position in the sheath groove 7.

When attaching the stopper P' of the second embodiment to the frame frame F, the leg pieces are slid into the sheath groove 7 in advance from the abutting ends of the frame bones when assembling the vertical and horizontal frame bones. Similarly, when the back plate is not inserted, this stopper P' can be stored within the frame by pressing the center part.
After inserting the back plate, press the center part of the surface of the leaf spring where the hooking part is, the arcuate part will pop out, and the back plate can be pressed from the back side.

[Effect of idea]

1 Even when the stopper of this invention is set on the frame frame,
It is possible to freely insert and remove the back plate, works, etc. In other words, when the stopper of the present invention is hooked to the edge of the frame rib, the stopper of the present invention does not protrude inward from the abutting wall of the backing plate, so it does not get in the way of putting in and taking out the work or the backing plate. . Furthermore, after setting the back plate on the picture frame, the back plate can be held down by pressing the stopper of the present invention with a finger.

2. With conventional back plate fasteners, there are few pressure points on the back plate and the pressure width is narrow and short, so large picture frames require a large number of fasteners. This has the advantage that only a small number of picture frames are required.

3. Recently, picture frames with narrow front walls are popular and preferred, but if the front wall is narrow, it is desirable that the rear wall is also narrow. However, conventional dragonfly and spring type fasteners require a certain width on the rear wall, and are therefore not suitable for the recent narrow rear wall picture frames. In contrast, the fastener of the present invention has the advantage that the rear wall can be made narrower.

4. The fastener of the present invention does not have a part that protrudes rearward from the rear wall, so it is convenient and safe to handle.

5. With conventional back plate fasteners made of spring material, when the stopper was removed from the picture frame, the elastic force caused the back plate to jump farther than the frame, damaging the back plate and fingers, or causing the stopper to fly out of the frame. However, in the stop of the present invention, the foot piece remains within the sheath groove, so the stop does not jump due to elastic force.

6. Since the return state of the leaf spring is the state of normal use, that is, the back plate fastening state, the fastener has good durability and the shape of the fastener is stable for a long time. On the other hand, since conventional leaf spring-like fasteners are constantly used in a compressed state, there is a problem in that the leaf spring deforms over a long period of time.

In addition, the material of the stopper of the present invention does not matter as long as it is a spring material.

Furthermore, in the above embodiment, a case has been described in which the hooking claw 27 is provided protrudingly provided toward the back side (upper side) and is hooked on the rear protruding edge 5. It goes without saying that the object of the present invention can be achieved even if it is configured so as to protrude and be hooked to the protrusion 6 of the intermediate projecting wall 3, and the present invention has been put into practice.

[Brief explanation of the drawing]

1 to 4 illustrate the first embodiment of the stopper P of the present invention, FIG. 1 is an external perspective view of the stopper P seen from the back side, and FIG. 2 is a latching claw of the stopper P. 2
Fig. 3 is a usage state in which the latching claw 27 is removed from the frame bone F to prevent the back plate 30 from coming off, and Fig. 4 is the same as in Fig. 2. FIG. 3 is a longitudinal cross-sectional view illustrating the hanging structure in use. Figures 5 and 6 show a second embodiment of the fastener of the present invention.
FIG. 2 is a front side perspective view and a back side perspective view showing the structure of P'. FIGS. 7 and 8 are perspective views showing a conventional back plate presser and its usage state, respectively. F...Frame bone, P, P'...stop, K...hanging part, 1...
Side wall, 2... Rear wall, 3... Intermediate projecting wall, 4... Front wall, 5... Rear projecting edge, 6... Projection, 7... Sheath groove, 7a... Opening, 7b... Inner groove, 21a, 21b... Leg Part, 22
a, 22b...foot piece, 23a, 23b...notch,
24... Upper retaining protrusion piece, 25... Back plate pressing edge, 27...
Latch claw, 28... groove, 29, 30... chamfer.

Claims (1)

[Scope of utility model registration request] This is a back plate stopper for a picture frame that is hung in a square-shaped sheath groove that has a narrow opening on the inside of the frame, and is mainly composed of an arcuately curved band-shaped leaf spring, and has a strip-shaped plate spring on both sides of the frame that is attached to the sheath groove. A foot piece that is wider than the width of the opening and is removably latched is provided in a row, and a latching claw that is removably latched to the opening of the sheath groove is provided protrudingly, and the band-shaped leaf spring is A back plate stopper for a picture frame, characterized in that the lower edge of the width of the strip is a wide back plate pressing edge.