JPH0420736Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a corner frame for folding boxes.

(Prior Art) This type of frame body is, for example, described in Japanese Utility Model Publication No. 58-40030, and includes an insertion frame with a downward U-shape and an outer side protruding from the upper surface to form an abutment piece. It is known that the insertion frame is made up of a circular seat attached to one end, and a pair of male and female insertion frames are pivotally supported by the circular seat so that the frame can be opened and closed in a hinged manner.

(Problem that the invention aims to solve) However, in this case, the insertion frames are designed so that when they are closed so as to butt each other, the width is smaller than the outer circumference of the circular seat, so that it is less than 1/2 of the outer diameter of the circular seat. , and its outside edge is formed to be tangent to the circular seat, so the circular seat is enlarged relative to the insertion frame and its outer periphery comes into contact with the folded box and gets in the way. In addition, when the insertion frames are opened to open 180 degrees to each other, the contact pieces protruding from the top surface of the insertion frames are formed so that they do not touch each other, so they can be opened even wider and folded. This not only made the box unstable, but also caused problems such as the insertion frame not being able to maintain an accurate 90° angle during box manufacturing. The present invention aims to improve this problem.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained with reference to FIGS. 3 and 4 corresponding to the embodiment. A male and female pair of the insertion frame body 1, which consists of an insertion frame 3 which is made to protrude from the upper surface 3b and serve as an abutment piece 4, and a circular seat 2 attached to one end of the insertion frame 3, is pivoted by circular seats 2, 2. In the corner frame for a folding box that can be opened and closed in a hinged manner, the circular seat 2 is connected to the inner side 3c of the insertion frame 3.
It is formed into an annular circular seat having a center on the outer side and an outer periphery on the inner side of the outer side 3a of the insertion piece 3, and the end of the contact piece 4 on the circular seat side passes through the center of the circular seat. It is characterized in that it is formed on a right-angled stopper surface 5, and that the male and female insertion frames 1, 1 are further provided with engaging portions 7 that snap into engagement with each other at right-angled positions of the frames 1, 1.

(Function) According to the present invention, the pair of male and female insertion frames 1, 1 can be inserted into the inner side 3 of both insertion frames 3, 3 by the above-mentioned means.
It rotates freely from the folded position where c, 3c are overlapped to the 180° open position where the stopper surfaces 5, 5 at the ends of the abutment pieces 4, 4 of both insertion frames 3, 3 abut. The engaging portions 7 are elastically engaged at the right angle positions, and the folding box in which the insertion frames 1, 1 are attached to the four corners is in an open state in which the insertion frames 1, 1 at the four corners are opened at right angles. One of the insertion frames 1, 1 at the two opposing corners from the open state is overlapped, and the other is folded into a folded state in which it is opened 180 degrees.

(Embodiment) An embodiment of the present invention will be described below based on the drawings. Reference numeral 1 indicates an insertion frame body, and the insertion frame body 1 has a circular seat 2 and a downward U-shape attached to the outside of the circular seat 2. The insertion frame 3 has an outer side 3a protruding from the upper surface 3b of the insertion frame 3 to form an abutting piece 4, and the circular seat 2 has an inner side 3a of the insertion frame 3.
an abutment piece 4 formed into an annular circular seat having a center 2a on the inside of the insertion frame 3 and an outer periphery on the inside of the outer side 3a of the insertion frame 3; The end on the circular seat 2 side is formed into a right-angled stopper surface 5 passing through the center 2a of the circular seat 2. The insertion frame 1 is pivotally supported in a hinged manner so as to be freely openable and closable with a support shaft 6 that weights the male and female pairs 1a and 1b with circular seats 2 and 2 and fits them into the shaft holes. 1a and 1b are provided with engaging portions 7 that elastically engage with each other at right angle positions.
Although the groove 7a is formed on the joint surface of the circular seat 2 of the male insertion frame 1b and the tongue piece 7b is formed on the circumferential surface of the circular seat 2 of the male insertion frame 1b, the present invention is not limited thereto. The engaging portion 7 is the circular seat 2 of the male and female insertion frames 1a and 1b.
Alternatively, the engagement may be performed by a ball resiliently provided on one side and a hemispherical recess provided on the other side.

(Effect of the invention) As described above, according to the invention, the circular seat 2 is an annular circular seat having the center 2a outside the inner piece 3c of the insertion frame 3 and the outer circumference inside the outer side 3a of the insertion frame 3. The circular seat 2 is the insertion frame 3.
It can be made smaller and does not interfere with the folding of the box, and the abutting piece 4 of the insertion frame 3 has its end on the circular seat 2 side at a right angle passing through the center 2a of the circular seat. Since the male and female pairs of the insertion frame 1, which are pivotally supported by the circular seat 2, contact the stopper surfaces 5, 5 when opened at 180°, and are not opened any further, the male and female pairs of the insertion frame 1 can be folded. The folded box is kept in a straight line and folded in a stable state, and the male and female insertion frames 1
A, 1b are provided with engaging portions 7 that snap into engagement with each other at a right angle position of the frames 1a, 1b, so that the male and female insertion frames 1a, 1b are maintained at right angles when the box is opened, and are prevented from collapsing. This has the effect that the box will not be deformed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the open state of the box to which the corner frame body according to the present invention is attached, Fig. 2 is a perspective view showing the box of Fig. 1 in the folded state, and Fig. 3 is the perspective view showing the box according to the present invention. FIG. 4 is a plan view of the corner frame bent at right angles, FIG. 4 is a front view of the corner frame according to the present invention developed at 180 degrees, and FIG. 5 is an exploded perspective view of the main parts. 2... Circle seat, 3... Insertion frame, 3a... Outer side,
3b... Upper surface, 4... Contact piece, 5... Stopper, 7... Engaging portion.

Claims (1)

[Scope of utility model registration request] A pair of male and female insertion frames are pivotally supported by the circular seat, and the insertion frame is formed into a downward U-shape and has its outer side protruding from the top surface and serves as an abutment piece, and a circular seat attached to one end of the insertion frame. In the corner frame for a folding box that can be opened and closed in a hinged manner, the circular seat has a center on the outside of the inner side of the insertion frame and an outer periphery on the inside of the outer side of the insertion frame. The abutment piece is formed into an annular circular seat, and the end of the contact piece on the circular seat side is formed into a stopper surface that is perpendicular to the center of the circular seat, and is further attached to the male and female insertion frames at mutually perpendicular positions of the frame. A corner frame for a folding box, characterized in that it has an engaging portion that snaps into engagement with the corner frame.