JPH10305864A - Center buckle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a center buckle for clamping firmly a material to be clamped provided with a lock mechanism of large structure strength. SOLUTION: A center buckle 1 is provided with a base 21, an upper front edge 22 and a lower front edge 23, a housing 2 with both ends supported on the upper front edge 22 and the lower front edge 23 and having a fixed shaft 11 to which a clamping belt 4 is hung, a front plate section 31, an upper rear edge 32 and a lower rear edge 33, a rotor 3 with both ends supported by the upper rear edge 32 and the lower rear edge 33 and having a rocking shaft 13 on which the clamping belt 4 is hung and a pair of supports supporting rotatably the rotor 3 on the housing 2, and one end 41 of the clamping belt 4 is engaged with the housing 2, and the other end 42 of the clamping belt 4 is wound on the rocking shaft 13 through the rear section of the fixed shaft 11, and also the rear section of the fixed shaft 11 is inserted for use, and a pair of supports are constituted of the fixed shaft 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a center buckle for tightening a belt wound around an object.

[0002]

2. Description of the Related Art As shown in FIG. 8, an over-center buckle 1 is used as a buckle for fastening one end of a belt and inserting the other end of the belt to fasten an object surrounded by the belt.
00 is used. The over-center buckle 100 has a fixed shaft 1 on which one end 41 of the fastening belt 4 is locked and the other end 42 of the fastening belt 4 is hooked.
1 and a rotating body 3 having a swinging shaft 13 around which the other end 42 is wound and inverted by a pair of fulcrums (centers) 1A, 1A.

[0003] The other end 42 of the fastening belt 4 is
Is used by inserting the back of the fixed shaft 11 so as to wind the swinging shaft 13 and inverting the swinging shaft 13. When the rotating body 3 is placed on the front surface of the housing 2, the fastening belt 4 is pulled and fastened, and when the rotating body 3 is separated from the front surface of the housing 2, the fastening belt 4 is loosened and opened.

The over-center buckle 100 is set such that a pair of fulcrums (centers) 1A, 1A are located between the fixed shaft 11 and the swing shaft 13 when the belt is fastened, and the belt fastening length (the fastening state) is set. And the open state)
Can be increased. This is advantageous when a large tightening length is required, such as in belt lashing in which a load stacked on a loading platform is fastened by a belt.

[0005]

The over-center buckle 100 requires a large force to fasten and open the buckle when the belt fastening length is long when the object to be fastened is a hard object having a small compressibility. I do. When the connection between the housing 2 and the rotating body 3 is performed by the support shaft, the fastening belt 4
Obstructs the tension between the fixed shaft 11 and the swing shaft 13.

For this reason, the connection between the housing 2 and the rotating body 3 is made by a pair of fulcrums 1A, 1
I have to do it at A. As a result, the connecting portion between the housing 2 and the rotating body 3 is in a cantilever state where there is no support between the pair of fulcrums 1A, 1A, and the structural strength is small. When a large load is applied to the rotating body of the buckle having this structure, a problem in which the pair of fulcrums 1A and 1A are deformed easily occurs.

[0007] The object of the invention described in claim 1 or 2 is as follows.
An object of the present invention is to provide a center buckle that can increase the structural strength of a connecting portion between a housing and a rotating body and can firmly fasten an object. An object of the invention described in claim 3 or 4 is to provide a center buckle having a lock mechanism that can be attached and detached with one touch and with a light operating force.

[0008]

According to the present invention, there is provided a substrate portion, an upper front edge and a lower front edge extending forward from the upper end and the lower end of the substrate portion, and both ends supported by the upper front edge and the lower front edge. A housing having a fixed shaft for hooking a belt, a front plate portion, an upper rear edge and a lower rear edge extending rearward at the upper and lower ends of the front plate portion, and both ends supported by the upper rear edge and the lower rear edge. A rotating body having a swing shaft for hooking the belt, and a pair of fulcrums for rotatably supporting the rotating body in the housing, one end of the belt being locked to the housing, and the other end of the belt being A part is wound around the swinging shaft behind the fixed shaft, and further, the pair of fulcrums are shared by the fixed shaft in a belt fastening buckle that is used by being inserted behind the fixed shaft. I do.

[0009]

According to the center buckle of the present invention, the amount of tightening of the belt for fastening and releasing can be set substantially equal to half the outer diameter of the fixed shaft. Further, since a pair of fulcrums that rotatably support the rotating body in the housing are shared by the fixed shaft, the structural strength of the fulcrum can be increased, and the rotating body can be fastened with a strong force. As a result, the workpiece can be firmly fastened.

According to the third aspect of the present invention, when the belt is fastened, the fixing between the housing and the rotating body can be automatically locked with the fastening operation. According to the configuration of the fourth aspect, the opening operation of the lock mechanism can be performed with one touch when the belt is opened.

[0011]

1 to 5 show a center buckle 1 according to the present invention.
And a rotating body 3 rotatably mounted on the rotating body. A fastening belt 4 is attached to the housing 2 and the rotating body 3 at one end 4 thereof.
1 is detachably hooked on the housing 2 and the other end 42
Are connected with the rotating body 3 inserted.

The housing 2 has a substrate portion 21 having a substantially rectangular planar shape, an upper front edge 22 and a lower front edge 2 extending forward from upper and lower ends (the same applies hereinafter) of the substrate portion 21 in the drawing.
3 The desired angle (0 to 0)
90 degrees, about 75 degrees in the figure) Hook substrate 2 inclined backward
4 is extended, and a hook 25 is provided by fixing a rectangular iron piece bent in a key shape. On the right side of the substrate section 21,
A rib 26 is provided which is bent substantially backward by 90 degrees.

The upper front edge 22 and the lower front edge 23 are extended rightward, and the front portions of the extended portions are guide edges 2G, 2G formed in a quarter arc shape. Guide edge 2
G and 2G have a slit 2 at the tip thereof in parallel with the substrate 21.
S and 2S are provided. Upper leading edge 22 and lower leading edge 2
A fixed shaft 11 is fixed to both ends of the left end of FIG.

In the center buckle 1, a rotating body 3 overlaps (is parallel to) a housing 2 as shown by a two-dot chain line in FIG.
When the rotating body 3 is arranged at the position where the rotating body 3 is arranged in series with the housing 2 as shown by a solid line in FIG. 2, the fastening belt 4 is opened. As the fastening belt 4, a woven belt made of polyester fiber or nylon fiber is used.

The rotating body 3 has a substantially rectangular front plate portion 31 that is longer and shorter than the substrate portion 21 of the housing 2, and an upper rear edge 32 extending rearward from the upper and lower ends of the front plate portion 31.
And a lower trailing edge 33. Upper trailing edge 32 and lower trailing edge 3
3 is formed in a semicircular shape, the center of which is in sliding contact with the inner walls of the upper front edge 22 and the lower front edge 23 of the housing 2,
It is supported by the fixed shaft 11. That is, the fixed shaft 1
Reference numeral 1 also serves as a support shaft for rotatably supporting the rotating body 3 on the housing 2.

On the fixed shaft 11 between the upper rear edge 32 and the lower rear edge 33, a rotary cylinder 12 and washers 1W, 1W disposed on both ends thereof are rotatably fitted. Rotating cylinder 12
Is substantially equal to the width of the fastening belt 4. Rotating body 3
In the middle part of the upper rear edge 32 and the lower rear edge 33, bulges 3A, 3A are provided facing inward.

A swing shaft 13 for hooking the other end 42 of the fastening belt 4 is stretched around the bulging portions 3A, 3A with both ends fixed. Both ends of the swing shaft 13 are accommodated in the bulging portions 3A, 3A. A rotating cylinder 14 having substantially the same length as the width of the fastening belt 4 is externally fitted to the swing shaft 13. Upper rear edge 32
On the other end of the bulging portions 3A, 3A of the lower rear edge 33, guide grooves 3B, 3B parallel to the front plate portion 31 are formed so as to face each other.

A front end of the front plate portion 31 (a free end of the rotating body 3) is a handle portion 34. In the middle, a U-shaped cut is bent substantially 90 degrees to form a rectangular window 35 and a cut-and-raised plate 36.
Are formed. On the back surface of the front plate portion 31, an engagement element 50 that constitutes a lock mechanism 5 (shown in FIG. 2) together with the guide edges 2G, 2G and the locking slits 2S, 2S is provided.

The engagement member 50 has a key plate 51 whose both ends protrude outward from the upper rear edge 32 and the lower rear edge 33 and are slidably fitted in the guide grooves 3B, 3B, and a front end of which is formed from the front plate portion 31. An operation plate 52 that protrudes forward and is slidably fitted in the rectangular window 35 and a connection rod 53 that penetrates the cut-and-raised plate 36 and connects the key plate 51 and the operation plate 52 are provided.

In this embodiment, the operation plate 52 and the connecting rod 53
Is fastened by a screw cut at one end of the connecting rod 53 and a nut screwed to the screw. The connection between the connecting rod 53 and the key plate 51 is performed by connecting an angle iron piece 55 fastened to the key plate 51.
The other end of the connecting rod 53 is penetrated, and is fastened by a screw cut at the other end of the connecting rod 53 and a nut screwed to the screw.

The engaging element 50 is externally fitted to the connecting rod 53, and is urged to one end by a spring 54 interposed between the cut-and-raised plate 36 and the angle iron piece 55. When the rotating body 3 in the open state is operated to overlap the housing 2 to fasten the belt, both ends of the key plate 51 slide with the guide edges 2G, 2G to compress the spring 54,
The engaging element 50 is displaced toward the free end.

Further, the free end side of the rotating body 3 is
, Both ends of the key plate 51 are automatically fitted into the locking slits 2S, 2S by the urging force of the spring 54, and the lock mechanism 5 is locked. This allows
The housing 2 and the rotating body 3 are fixed.

To release the lock mechanism 5, when a finger is put on the operation plate 52 and pressed toward the free end, the spring 54 is compressed, and both ends of the key plate 51 are disengaged from the locking slits 2S, 2S. At the same time, a finger is hung on the handle portion 34 and the rotating body 3
Is rotated to return the rotating body 3 to the position where the rotating body 3 is in series with the housing 2, the fastening belt 4 is opened.

The fastening belt 4 has the hook 2 at one end 41.
5 is connected to a hook 43 that is detachably hooked. The other end 42 of the fastening belt 4 is
The buckle housing 2 is inserted through the rear of the rotary cylinder 14, wound around the rotary cylinder 14, reversed and passed in front of the rotary cylinder 14, inserted behind the rotary cylinder 12 and in front of the fastening belt 4. Has been pulled out to the right.

The center buckle 1 includes a housing 2
With the rotating body 3 set to the left (open position) with respect to the fixed shaft 11 and the hook 43 removed from the hook 25,
The fastening belt 4 is wound around an object. Next, the hook 43 is hooked on the hook 25, and the rotating body 3 is rotated to set the rotating body 3 to the right (fastened position) with respect to the fixed shaft 11. Thereby, the fastening belt 4 is tightened by a length corresponding to a half circumference of the rotary cylinder 12 of the fixed shaft 11.

FIGS. 6 and 7 show an embodiment in which the center buckle 1 is used for a hanging ladder 6. A shown in FIG.
The pillars such as trees in a forest, telephone poles and the like, and the hanging ladder 6 which are objects to be fastened are detachably fastened to the pillar A. The hanging ladder 6 has one support 7 and four steps 8 fastened to the left and right of the support 7.

A fastening belt 4 for detachably fastening the hanging ladder 6 to the column A, and a center buckle 1 as a fastening tool for fastening the fastening belt 4 are attached to the column 7.
Is attached. A substantially V-shaped contact plate 61 as a holder for holding the column A is fixed to the side of the column A of the column 7.

In this embodiment, the backing plate 61 is provided in accordance with the position where the fastening belt 4 and the center buckle 1 are attached, so that the fastening force of the fastening belt 4 directly affects the column A. In this embodiment, the column 7 is formed by cutting an equilateral angle steel having an apex angle of 120 degrees into 120 cm and using the column so that the angle is on the column A side (back side). A connecting member 71 having a triangular cylindrical shape is welded to an upper end of the column 7 as a connecting portion for connecting the hanging ladder 6.

At a predetermined position of the column 7, an attachment member 62 for attaching the fastening belt 4 to the column 7 is fastened. At the upper end and the lower end of the mounting member 62, angled portions 63, 63 are formed in accordance with the angled steel of the column 7, and the housing 2 of the center buckle 1 is fastened to the intermediate flat plate portion 64.

As described above, when the object to be fastened is a solid pole such as a tree or a concrete electric pole, and the outer periphery is relatively small, the center buckle 1 of the present invention is characterized by the connecting portion between the housing and the rotating body. The feature that the structural strength can be increased and the object can be firmly fastened is particularly effective.

[Brief description of the drawings]

FIG. 1 is a perspective view of a center buckle.

FIG. 2 is a plan sectional view of a center buckle.

FIG. 3 is a front view and a partial cross-sectional view of a center buckle.

FIG. 4 is a front view of a center buckle attached to a hanging ladder.

FIG. 5 is a side sectional view of a center buckle.

FIG. 6 is a perspective view of a hanging ladder.

FIG. 7 is a perspective view of a hanging ladder.

FIG. 8 is a perspective view of a conventional over-center buckle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Center buckle 2 Housing 3 Rotating body 4 Fastening belt 5 Lock mechanism 6 Hanging ladder 11 Fixed axis 13 Swing axis 21 Board part 22 Upper front edge 23 Lower front edge 31 Front plate part 32 Upper rear edge 33 Lower rear edge 50 Goko 51 key board

Claims (4)

[Claims] 1. A board portion, an upper front edge and a lower front edge of which the upper end and the lower end of the board portion are extended forward, and a fixed shaft supported at both ends by the upper front edge and the lower front edge and hooking a belt. Housing, a front plate portion, an upper rear edge and a lower rear edge of which the upper and lower ends of the front plate portion are extended rearward, and a swing shaft which is supported at both ends by the upper rear edge and the lower rear edge, and hooks a belt. A rotating body having a pair of fulcrums that rotatably support the rotating body in the housing,
A belt fastening buckle that is used by locking one end of a belt to the housing, winding the other end of the belt around the swing shaft through the back of the fixed shaft, and further inserting the back of the fixed shaft through the back. A center buckle wherein a pair of fulcrums are shared by the fixed shaft. 2. The center buckle according to claim 1, wherein an upper rear edge and a lower rear edge of the rotating body are fitted between an upper front edge and a lower front edge of the housing at the time of fastening. 3. The center buckle according to claim 2, wherein an arc-shaped guide edge is formed on the other end of the upper front edge and the lower front edge of the housing, and a key groove is provided on the guide edge. A key plate which is displaced by sliding the guide edge on the back surface of the front plate portion with the fastening operation of overlapping the rotating body on the housing, and which is fitted into the engaging portion; A center buckle provided with a lock mechanism comprising a spring biasing to an end side. 4. The center buckle according to claim 3, wherein a window is provided in a front plate portion of the rotating body, and an unlocking handle is provided on the engaging member to protrude from the window to the surface.