JPH0677624U - Forehead back plate fastening device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a fastening device which can easily insert and lock a clip and can be easily and surely fixed to a back plate. [Structure] An engaging hole 2 provided at an outer edge portion of a back plate 1 and a clip 3 which is non-separably engaged with the engaging hole and slidably retractable. The engaging hole of the back plate is an inlet 2a. An elastic leg portion 4b is provided on a body portion 4a which is formed by a notch 2b which is wider than the entrance width t and which is inserted into the entrance of the back plate engaging hole by a clip. It is composed of a core body 4 provided with claws 14, an inner holding piece 5 protruding outward from the core body, and an outer holding piece 15 protruding inward, so that the clip can slide in the locking hole, and It is locked so that it cannot be removed, and the inner holding piece is inserted and locked in the frame 7 by sliding the clip.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a fastening device for a back plate that is inserted into a frame.

[0002]

[Prior art]

 The frame for displaying paintings and photographs is rotatably tacked with nail pieces, commonly called dragonfly, on the back side of the vertical frame and horizontal frame that make up the frame, and the nail frame is used as a frame. Pivot to the inserted back plate and lock the back plate irremovably, or conversely, rotatably tack the claw pieces to the vertical and horizontal sides of the back plate and fit the back plate to the frame. After inserting, the claw pieces that were tacked to the back plate were rotated to the frame, and the back plate was locked so that it could not fall off.

In recent years, as a means for attaching the back plate to the frame, a recessed groove is cut inward from the vertical and horizontal outer edges of the back plate, or long rectangular holes are bored in the vertical and horizontal outer edges toward the inner and outer circumferences. Insert the locks into these recessed grooves and rectangular holes so that they cannot slip out and can slide in and out, and after inserting the back plate into the frame, slide the locks toward the frame. It moved and locked the back plate so that it could not fall off. (For example, Japanese Utility Model Publication No. 52-21272, Japanese Utility Model 3-35181, and Japanese Utility Model 4-45573)

[0004]

[Problems to be solved by the device]

 In the case of a rotary claw piece commonly called a dragonfly, if the claw piece is frequently or roughly rotated, the tip of the claw piece, which is separated from the rivet attachment part, rises and the locking force of the back plate weakens. In addition to the problems, the force is concentrated on the tacked part, so the nail piece is damaged or cut near the tacked part and only the tack is left behind. Further, since this type of rotary claw piece has a weak locking force, it is not suitable as a fastening device for a back plate or a heavy back plate that is inserted into a large frame.

In a fastening device in which a recessed groove or a rectangular hole is provided in the outer edge portion of the back plate and a locking tool is fitted and locked in the recessed groove or the rectangular hole, Various fitting and locking means of the locking tool have been devised, but each of the fitting and locking means has advantages and disadvantages. The present invention has been made in view of the above problems of the prior art. The purpose of the present invention is to make it easy to insert and lock a clip and to attach it to a back plate easily and securely. To provide a device.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a fastening device for a forehead back plate according to the present invention is provided with a locking hole provided on an outer edge portion of the back plate and a clip which is irremovably locked in the locking hole and can slide in and out. The locking hole of the back plate is formed by the entrance and the inner part that is cut out wider than the entrance width, and the clip is inserted into the inner part of the entrance of the back plate locking hole and locks irremovably. It consists of a slidable core, an inner gripping piece that projects outward from the core, and an outer gripping piece that projects inward.The clip is slid onto the inner gripping piece. It will be suspended.

[0007]

【Example】

 Hereinafter, the structure of the fastening device for a forehead back plate according to the present invention will be described with reference to FIG. 1. The fastening device has a locking hole 2 provided on an outer edge portion of the back plate 1 and a locking hole 2. It is composed of a clip 3 that is locked so as not to be detachable and is slidable. Inserting the retaining pieces 5 and 15 of the back plate 1 in a staggered manner in the core body 4 that is inserted and locked from the stop hole entrance 2a to the inner portion 2b, and slide the clip 3 to insert the inner retaining piece 5 into the frame 7. It locks.

As shown in FIG. 8 and FIG. 9, the frame 7 has a fitting groove 18 of the frame bone 8 facing inward, and both ends thereof are inclined end faces with an inclination angle of 45 degrees inclining downward from the outer periphery toward the inner periphery. By cutting, the forehead bone 8 is made a vertical bone and a horizontal bone, the inclined end faces are butted, and the abutting portion is fixed by a connecting tool (not shown), and assembled in a frame shape. The glass plate G and the back plate 1 are fitted into the fitting groove 18 of the frame 7, and the work A is housed between the glass plate G and the back plate 1.

The back plate 1 is made of wood, synthetic resin, or plywood, and the locking hole 2 is cut inward from the outer edge of the back plate 1 as shown in FIG. 2A. After the entrance 2a, a back portion 2b which is notched wider than the entrance width t is continuously formed. The locking hole 2 is usually formed at one place at the center of each side. However, in the case of a large or wide back plate 1, for example, on the left and right sides of the long side, or Formed in two places above and below.

As shown in FIGS. 5 and 6, the clip 3 has an inner holding piece 5 projecting from the inner surface side of the core body 4 inserted and locked in the locking hole 2 of the back plate 1 in the outer peripheral direction and at the outer surface side. An outer holding piece 15 is further projected in the inner circumferential direction and is integrally molded of synthetic resin. The core body 4 has a thickness equal to the back plate thickness s, and the locking hole inlet 2a A forked elastic leg portion 4b slightly thinner than the body portion 4a is integrally provided at the rear portion of the body portion 4a that can be inserted into the body 4a, and the elastic leg portion 4b has a leg opened wider than the entrance width t, A wedge-shaped locking claw 14 that tapers in the insertion direction is provided, and the elastic leg portion 4b provided with the locking claw 14 can be bent and deformed.

The holding pieces 5, 15 are wider than the inner part width T and are formed longer than the engaging hole depth H from the outer edge of the back plate 1 to the bottom of the engaging hole inner part 2b, and moreover, the core body part 4a. More prominently projecting inside and outside. Specifically, the inner holding piece 5 is projected from the inner surface side of the core body 4 toward the outer circumference, the outer holding piece 15 is projected from the outer surface side of the core body 4 toward the inner circumference, and the cutting depth of the locking hole deep portion 2b is set. It becomes slidable within the range of h, and the protruding portion of the inner holding piece 5 is projected and retracted from the back plate 1 toward the frame frame fitting groove 18. The outer holding piece 15 is formed with a saw-toothed or uneven slip stopper 6 on the outer surface.

Since the forehead back plate fastening device of the present invention has the above-described structure, each side of the back plate 1 is preliminarily cut out with the locking hole 2 in the inner portion 2b wider than the entrance 2a, and the clip 3 is formed. 2 are formed separately, and first, as shown in FIG. 2, the core body 4 interposed between the holding pieces 5 and 15 of the clip 3 is inserted from the locking hole inlet 2a of the back plate 1 toward the inner portion 2b. Since the locking claw 14 is wider than the entrance 2a, the elastic leg 4b is inserted while being bent and deformed inward. When the locking claw 14 reaches the inner part 2b of the locking hole 2 as shown in FIG. 3, the locking claw 14 inserted while bending is elastically restored, and the leg is opened wider than the entrance 2a of the locking hole 2. , Disable the detachment of the clip 3.

The clip 3 fitted into each locking hole 2 of the back plate 1 is lightly locked to the back plate 1 by the holding pieces 5 and 15 projecting from the core body 4 toward the inner and outer circumferences. After inserting the back plate 1 into the frame 7, and sliding each clip 3 toward the outer periphery as shown in FIG. 4, the inner holding piece 5 of each clip 3 projects from the back plate 1 and the frame 7 Insert it into the fitting groove 18 and fix the back plate 1 so that it cannot be removed. The outer holding piece 15 of the clip 3 that slides in the outer peripheral direction closes the locking hole 2.

In the clip 3 of FIG. 7, the core body 4 and the holding pieces 5 and 15 are configured separately, and the inner holding piece 5 is formed on the inner surface of the core body 4a and the outer holding piece 15 is formed on the outer surface of the core body 4a. And the inner holding piece 5 projects outward from the core body 4, and the outer holding piece 15 projects at least from the core body 4 to the inner circumference side. It is also possible to provide an inclined portion 5a at the protruding portion of the inner holding piece 5 to facilitate the insertion into the frame frame fitting groove 18.

The fastening device for the back plate for the forehead according to the present invention is not limited to the above-mentioned embodiment, and for example, is attached to the protruding portion of the inner holding piece 5 constituting the clip 3 and the forehead bone 8. It is also possible to provide a protruding ridge 5b for locking. Further, the shape of the locking hole 2 of the back plate 1, the clip 3 fitted and locked in the locking hole 2, especially the leg portion 4b of the core body 4 and the locking claw 14 is contrary to the gist of the present invention. Unless otherwise, it can be changed appropriately.

[0016]

[Effect of device]

 Since the fixing device for the back plate for the forehead of the present invention is configured as described above, it has the following effects. The inner part of the locking hole of the back plate is cut out wider than the entrance, the elastic leg is provided on the core of the clip, and the locking claw wider than the entrance and tapered in the insertion direction is formed at the tip. By simply inserting the core of the clip toward the inner part from the entrance of the locking hole, the clip can be fitted easily and surely. Moreover, the clip once inserted cannot be removed, and can slide on the inner and outer circumferences in a stable state.

Since the locking hole of the back plate is not affected by the appearance and withdrawal of the clip and is always closed by the holding piece, dust is less likely to enter the forehead through the locking hole. Moreover, since the structure of the clip is simple and suitable for mass production, the clip can be provided at low cost, and the clip can be handled safely and reliably. As a result, the efficiency of painting replacement is dramatically improved. In particular, the fastening device of the present invention has an advantage that it can be used in a wide range from a small frame to a large frame.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a main part structure of a fastening device of the present invention.

FIG. 2 is a partially cutaway plan view showing an example of fitting a clip into (A) and (B) locking holes of FIG.

FIG. 3 is a partially cutaway plan view showing an example of (A) and (B) clips appearing and disappearing.

FIG. 4 is a transverse sectional view showing an example of (A) and (B) clips appearing and disappearing.

5 (A), (B), and (C) are a front view, a vertical cross-sectional view, and a horizontal cross-sectional view.

FIG. 6 is a plan bottom view of the clips (A) and (B) of FIG.

7 (A), (B), and (C) are partially cutaway front views, side views, and vertical sectional views.

FIG. 8 is a cross-sectional view showing a usage state.

FIG. 9 is a cross-sectional view of a frame.

FIG. 10 is a plan view showing a mounting example of a clip.

[Explanation of symbols]

1 Back plate 2 Locking hole, 2a Locking hole entrance, 2b Locking hole inner part 3 Clip 4 Core body, 4a Body part, 4b Elastic leg part 5,15 Holding piece 6 Non-slip 7 Frame frame 8 Frame 14 frame Stopper, 18 Fitting groove A work, G Glass plate H Lock hole depth, h Lock hole depth of cut s Back plate thickness, T Lock hole depth, t Lock hole Entrance width

Claims (1)

[Scope of utility model registration request] 1. A back plate comprising a locking hole (2) provided at an outer edge portion of the back plate (1) and a clip (3) which is non-detachably locked in the locking hole and can slide in and out. The locking hole is deeper than the entrance (2a) and wider than the entrance width (t) (2b)
A core body (4) formed of a clip, which is inserted deeper than the entrance of the back plate locking hole, locks irremovably and is slidable, and an inner holding piece projecting outward from the core body. A forehead back plate fastening device comprising (5) and an outer holding piece (15) projecting inward in the circumference, and inserting and locking the inner holding piece into the frame (7) by sliding the clip.