JP3862218B2 - Frame back plate stopper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a back plate stopper for a frame which is partially attached to a frame of an extruded shape member such as aluminum and used to hold down a back plate by elasticity.
[0002]
[Prior art]
About how to fix the back plate of the frame, a rotating claw generally called a dragonfly is pivotally attached to the back side of the frame with screws, but there are difficulties in operability and the back side is often narrow. Since a frame made of an extruded profile has a problem that it is not suitable for axial attachment, a plastic back plate stopper that can be detachably attached to the frame is often used. Examples thereof include those described in Utility Model Registration No. 2596874.
[0003]
According to the frame back plate stopper described in the above publication, the frame as the mounting target is formed with an inward mounting groove on the back plate, and the outer piece on the back side constituting the mounting groove. Locking ridges project in the direction of closing the groove opening at the edge, so that the mounting groove is formed in a semi-ditch groove shape, on the other hand, the back plate stopper has an outer piece together with the locking ridge A pressing piece that presses the back plate by elastic deformation protrudes from the opening-type holding part that sandwiches it, and the lower front projecting piece that constitutes the holding part that sandwiches the outer piece of the frame has a locking protrusion on the mounting groove opening. A hanging mountain-shaped protrusion is formed. Therefore, when attaching to and removing from the frame, the mountain-shaped protrusion is operated so as to get over the locking protrusion by pushing or pulling it toward the frame.
[0004]
[Problems to be solved by the invention]
According to the conventional back plate stopper of the frame as described above, the attachment / detachment operation is performed by pressing the finger on the curved and inclined portion of the pressing piece so that the forward force is easily applied at the time of attachment. However, it was difficult to apply a pulling force during the retreat. In addition, since the clamping portion of the mounting groove opening of the frame is attached in a deep state where the clamping portion is not easily elastically deformed, a pulling force is also required to release the hooked state. In addition, the detaching operation is not easy, and there are many resistances in the mounting, and there is a difficulty in operability.
[0005]
In addition to the frame, the mounting groove is formed in a large opening that accepts the front protrusion with the mountain-shaped protrusions of the back plate stopper, and also has a locking protrusion on the opening edge, so that the back side Further, since the size (corresponding to Y in FIG. 3 showing the embodiment of the present invention) is taken and the front and rear widths of the frame are widened, there is a problem that the frame is restricted from the design.
[0006]
In view of the above circumstances, an object of the present invention is to provide a frame back plate stopper that can be easily attached to and detached from a frame of a frame and that is simple in structure and suitable for a thin frame. did.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, an L-shaped projecting piece whose front end faces inward toward the back plate is provided on the back surface of the frame of the frame, and is inserted into the inwardly refracting piece of the L-shaped projecting piece. A back plate stopper that elastically presses the back plate, and a spring plate that can be elastically deformed at the rear end of the U-shaped sandwiching portion that is inserted into the L-shaped projecting piece so as to apply a lateral force. In addition, a back plate push leg is provided at the rear end of the spring plate portion, and a check claw that protrudes from the refractive outer edge of the L-shaped protruding piece is provided at the tip of the upper insertion piece constituting the clamping portion, and the check claw Are formed with side inclined surfaces so that the width gradually decreases from the width center to both side ends, and the lateral swinging force applied to the spring plate portion is an L-shaped projecting piece with the side end of the check pawl acting as the point of action. The U-shaped inner end of the clamping part and the tip edge of the lower insertion piece are supported on the L-shaped projecting piece so Picture frame as to each other to form a convex curved surface in contact with the center, with the movement of the working point associated with riding the return-preventing claw, wherein said fulcrum is configured to move sideways along the curved surface Back plate stopper was constructed.
[0008]
[Action]
According to said structure, in order to attach the back plate stopper to a frame, it is pressed, inserting a clamping part into the inward-refractive piece of the L-shaped protrusion piece protrudingly provided by the back surface of a flame | frame. As a result, the upper insertion piece mainly elastically deforms once in the clamping part, so that the check jaw at the tip does not get caught on the refracting outer corner edge of the L-shaped projecting piece, and in this state, the elasticity of the spring plate part The back plate is held down. Therefore, it can respond to the thickness of the contents including the back plate. Further, when removing, the rear end is picked up or applied with a force so that it swings to the side and is pulled out after removing the check claw while rotating along the convex curved surface with respect to the L-shaped projecting piece.
[0009]
This detachment procedure will be specifically described with reference to the drawings. In the present invention, the U-shaped inner back end surface of the sandwiching portion 13 and the tip edge of the lower insertion piece 20 are formed on the convex curved surfaces 27 and 29 that contact each other at the center with the L-shaped projecting piece 3 as a fulcrum. To do.
[0010]
In this shape, when a finger is applied to the rear end and a force is applied from the side to move it (arrow F in FIGS . 4 and 5 ), the center of the convex curved surface 29 is an L-shaped projecting piece when the corner of the rear end is a force point Sa. 3 and the distance to the action point Sc at one end of the check claw 21 is approximately halved (compared to the case where there is no convex curved surface), and the boosting force of the insulator is easily applied to the action point Sc. In addition, since that portion is the lowest portion on the side inclined surface 25 of the check claw 21, one end of the check claw 21 can be run on the L-shaped projecting piece 3 without requiring force.
[0011]
By this riding, the action point Sc moves to the center of the check pawl 21, but the fulcrum Sb where the back plate stopper P rotates on the convex curved surfaces 27 and 29 and contacts the frame 1 also moves (so as to be followed). As a result of maintaining the distance between the fulcrums Sb, Sb and the action point Sc necessary for the check claw 21 to sequentially ride up without being at the same position in the center (FIG. 5), the check claw 21 can be removed as a whole. From this, it can be easily pulled out by simply pulling. The arrow Q indicates the direction of rotation along Sb.
[0012]
The shape of the rear end portion of the back plate stop P, can take a variety of shapes to be suitable for or shake the transverse push or pull, but easily takes the finger on both sides by widely forming the rear end If a convex angle is formed and the rear end surface is formed into a concave curved surface so that it can be easily pushed by a finger (Claim 2) , the structure is simple and the operation is easy to perform .
[0013]
【The invention's effect】
As described above, according to the frame back plate stopper of the present invention, the attachment is completed simply by inserting it into the L-shaped projecting piece of the frame, and the convex curved surface is brought into contact with the L-shaped projecting piece by fingering from the side. The check claw can be easily removed simply by riding the lower end of the check claw with the fulcrum as the fulcrum and rotating it by moving the fulcrum, making it easy to install and remove. obtain. Moreover, since the mounting location is a simple L-shaped projecting piece and is hooked on the outside thereof, there is an excellent effect that it is suitable for a thin frame.
[0014]
【Example】
Next, an embodiment of the present invention will be described with reference to the drawings.
[0015]
The drawing shows an embodiment, and the back plate stopper P of the frame is attached to the L-shaped projecting piece 3 of the frame 1 on the back side of the frame G, whereby the back plate 5 is elastically attached. It can be held down.
[0016]
The frame 1 of the frame is formed hollow as an aluminum extruded profile, and an L-shaped projecting piece 3 is provided on the back surface thereof so that the front end faces inward. An inward groove 8 is provided between them. Further, the frame 1 is formed with a latching piece 11 of the transparent plate 9 at the inner end on the front side, and the inward groove 8 is not a dovetail, so that the thickness Y is formed thin.
[0017]
The back plate stopper P is integrally formed of plastic and has a horizontal plate-like thin shape that is almost rectangular, and a U-shaped holding portion 13 that is inserted into the inwardly refracting piece 7 of the frame 1 is formed at the front end portion. The spring plate portion 15 is projected at the rear end of the sandwiching portion 13, the push leg 17 is vertically suspended at the rear end, and the upper insertion piece 19 of the sandwiching portion 13 projects further forward than the lower insertion piece 20, A check claw 21 is formed on the bent outer edge of the L-shaped projecting piece 3.
[0018]
The check pawl 21 has a slope 23 having a clearance angle that allows insertion, but is formed with side inclined surfaces 25 and 25 that are low on both sides from the center of the width, so that it has a shape of a half-square pyramid. And the convex curve surface 27 of the circular arc which protrudes ahead from the inner side rear end of the clamping part 13 and the front-end | tip of the lower insertion piece 20 so that the fulcrum Sb which contacts the L-shaped protrusion 3 may move with the force from this side. , 29. Thereby, the non-return claw 21 is easily removed by a smooth rotation operation.
[0019]
The L-shaped projecting piece 3 can be easily inserted into the inwardly refracting piece 7, has a slightly wider rear end, and has a concave curved surface 31 for abutting the finger at the rear end. An inclined guide port 32 is formed on the upper surface of the tip. Moreover, in order to make it easy to put on a finger and pick it out, both sides of the rear end are rounded convex angles 33, 33.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of a picture frame showing a back plate stopper of the picture frame according to the present invention as attached.
FIG. 2 is a bottom view showing the back plate stopper.
FIG. 3 is a partial cross-sectional view of a picture frame showing a mounting state of the back plate stopper.
FIG. 4 is a rear view of the same part for explaining the removal procedure.
FIG. 5 is a partial rear view of the frame for explaining the back plate stopper in the following manner of removal.
[Explanation of symbols]
G Frame P Back plate stopper 1 Frame 3 L-shaped projecting piece 5 Back plate 7 Inwardly refracting piece 13 Clamping portion 15 Spring plate portion 17 Pushing foot 19 Upper insertion piece 20 Lower insertion piece 21 Reverse claw 25 Side inclined surface 27 , 29 Convex curved surface 31 Concave curved surface 32 Guide port 33 Convex angle

Claims (2)

This is a back plate stopper that has an L-shaped projecting piece with the tip facing inward toward the back plate on the back of the frame of the frame, and is inserted into the inwardly refracting piece of the L-shaped projecting piece to press the back plate with elasticity. A spring plate that can be elastically deformed is projected at the rear end of the U-shaped sandwiching portion to be inserted into the L-shaped projecting piece so as to apply a lateral force, and a back plate pusher leg is provided at the rear end of the spring plate. A check claw that protrudes from the refracting outer edge of the L-shaped projecting piece is projected at the tip of the upper insertion piece that constitutes the clamping part, and the check claw is gradually lowered from the width center to the both side ends. Side-shaped inclined surfaces are formed on both sides, and the U-shape of the clamping part is such that the lateral swinging force applied to the spring plate part acts as a force to ride on the L-shaped projecting piece with the side end of the check claw acting as an action point The inner back end surface and the tip edge of the lower insertion piece are each formed into a convex curved surface that contacts the center of the L-shaped projecting piece as a fulcrum. It, along with the movement of the working point associated with riding the return-preventing claw, the frame of the back plate stop, characterized in that said fulcrum is configured to move sideways along the curved surface.   2. The frame back plate stopper according to claim 1, wherein the rear end is formed wide so that convex angles are formed on both sides of the rear end easily, and the rear end surface is formed into a concave curved surface for easy finger pressing. .