JP2009183993A - Simple bender - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple bender which does not need any hydraulic pressure and electricity and also his simple in mechanism. <P>SOLUTION: This simple bender 1 includes: an approximately sectorial bending shoe 10 on which a groove ( the same as a caliber) 11 having a circular-arcuate (including an approximately U-shape) cross section; an extruding screw bar 20 which is grasped freely rotatably with the bending shoe; a screw receiver 30 which is screwed on the screw bar and in a vertical part 42 on which the screw receiver is fixed, and a T-body 40 provided with a horizontal part 41 on which bending supports 50a, 50b are formed at both ends. The bending shoe 10 on which an approximately spherical part is formed oat its tip, a slip-off preventing C clip is installed and which is freely rocked to the extruding screw bar 20 and connected so as to be impossible to slip off. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a simple bender, and more particularly to a simple bender for bending a relatively thin tube by human power.

  Conventionally, as a bender for bending a relatively thin tube, so-called “three-point bending” is generally used in which a tube is supported at two points and the tube is pushed in the center. At this time, a bending shoe (piece) for pushing the pipe in the center is advanced and retracted by using a hydraulic pressure or an electric motor. On the other hand, simple vendors that do not use hydraulics or electric motors have also been developed (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 57-181423 (1 page, FIG. 2)

  However, the invention described in Patent Document 1 swings the second handle relative to the first handle and prevents the pawl teeth (formed on the rod) engaged by the swing operation from returning. However, since the feeding shoe is moved forward and the bending shoe (piece) is advanced, the hydraulic mechanism and the electricity are unnecessary, but the mechanism is complicated, and there is a problem in durability due to failure or wear.

  The present invention has been made to solve the above problems, and an object thereof is to provide a simple vendor having a simple mechanism while eliminating the need for hydraulic pressure and electricity.

(1) A simple bender according to the present invention is a simple bender for bending a tubular body,
A substantially fan-shaped bending shoe having a circular arc-shaped groove that allows the tube to enter the outer periphery;
An extrusion screw rod whose one end is gripped by the bending shoe at the position of the substantial sector of the bending shoe;
A screw receiver to which the extruded screw rod is screwed;
A T-shaped body including a vertical portion to which the screw receiver is fixed and a horizontal portion having bending supports formed at both ends;
The bending shoe is rotatable with respect to the axial center of the extrusion screw rod, and the bending shoe that advances by the rotation of the extrusion screw rod pushes the tube supported by the bending support. The tube is bent.

(2) In the above (1), a cylindrical portion into which the one end portion of the push-out screw rod can enter is formed at a substantial fan-shaped position of the bending shoe.
The one end of the extruded screw rod is formed in a substantially spherical shape,
The substantially spherical end portion of the extruded screw rod is in contact with the bottom surface of the cylindrical portion of the bending shoe.

(3) In the above (1) or (2), the one end portion of the push screw rod can enter at a substantial fan-shaped position of the bending shoe, and an annular inner circumferential groove is provided on the inner circumference. A cylindrical part is formed,
An annular outer circumferential groove is formed on the outer periphery at the one end of the extruded screw rod,
In the state where the one end portion of the extruded screw rod enters the cylindrical portion, a slip-preventing C-clip that enters both the inner circumferential groove and the outer circumferential groove is disposed. .

  (4) In any one of the above (1) to (3), at least a pair of opposed planes are formed on the outer periphery at the other end opposite to the one end that holds the bending shoe of the extruded screw rod. It is characterized by facilitating the engagement of the tool for rotation.

  (5) In any one of (1) to (4), a square screw is formed on the extruded screw rod.

Since the hook device according to the present invention has the above configuration, the following effects can be obtained.
(I) The sea chest according to the present invention has a simple mechanism, the possibility of failure and wear being minimized, and excellent durability because the bending shoe advances and retreats by the rotation of the extrusion screw rod. Further, since the tube body can be bent only by rotating the extrusion screw rod, the operation is easy and the operation becomes quick.

  (Ii) Since the substantially spherical end of the extruded screw rod comes into contact with the bottom surface of the cylindrical portion of the bending shoe, the bending shoe can swing freely. Even if an asymmetric force acts on the bending shoe, Excessive force does not act on the screw receiver.

  (Iii) Since the bending shoe and the extrusion screw rod are coupled by the C-clip for preventing the removal, the bending shoe is rotatably connected to the extrusion screw rod by a simple structure.

  (Iv) Since at least one pair of opposed planes is formed on the outer periphery at the other end of the extruded screw rod, it is easy to engage with a tool for rotation (eyeglass wrench, hexagon spanner, etc.) Be easy and quick.

  (V) Since the square screw is formed on the extrusion screw rod, the extrusion screw rod is excellent in durability, and the extrusion screw rod can be easily rotated during bending.

[Embodiment]
1 and 2 show a simplified vendor according to an embodiment of the present invention. FIG. 1 is a perspective view, and FIG. 2 is a plan view with a part in cross section. In addition, in each figure, since each member is typically shown, the dimension etc. are not limited to what was illustrated. Moreover, the same code | symbol is attached | subjected to the same part, respectively.

1 and 2, the simple bender 1 is a “three-point bending process” of a tubular body (not shown), and has a circular arc shape (including a substantially U-shape) that allows the tubular body to enter the outer periphery. A substantially fan-shaped bending shoe 10 in which a groove (same as caliber) 11 is formed;
An extrusion screw rod 20 whose one end 21 is gripped by the bending shoe 10 at the position of the substantially sector 12 of the bending shoe 10;
A screw receiver 30 to which the extrusion screw rod 20 is screwed;
It has a T-shaped body 40 including a vertical portion 42 to which the screw receiver 30 is fixed and a horizontal portion 41 having bending supports 50a and 50b formed at both ends.

  A cylindrical portion 13 into which one end portion 21 of the extruded screw rod 20 can enter is joined to a position of a substantially sector 12 of the bending shoe 10. The cylindrical portion 13 is formed by joining a cup portion (bottomed cylindrical portion) 13a and a cylindrical portion (bottomless) 13b to each other, and an annular inner circumferential groove 13c is formed on the inner circumference at the joined portion. Is formed.

  In one end portion 21 of the extruded screw rod 20, a substantially spherical surface 21a is formed on the end surface, and an annular outer circumferential groove 21b is formed on the outer periphery at a predetermined distance from the end surface. On the other hand, a square column 23a is formed at the other end 23. And the square screw 22 is formed in the range (substantially full length) pinched | interposed into the one edge part 21 and the other edge part 23. FIG.

The substantially spherical surface 21 a of the end surface of the extruded screw rod 20 is in contact with the bottom surface 13 d of the cylindrical portion 13 of the bending shoe 10. In addition, a drop prevention C-clip 60 that enters both the inner circumferential groove 13c of the cylindrical portion 13 and the outer circumferential groove 21b of the extruded screw rod 20 is disposed.
Therefore, the bending shoe 10 is connected to the push screw rod 20 so as to be able to swing and not to be pulled out. That is, even if an asymmetric force is applied to the bending shoe 10, no excessive force is applied to the screw receiver 30.
Further, the slip-off preventing C-clip 60 is rotatable about the axial center with respect to one or both of the inner circumferential groove 13c and the outer circumferential groove 21b. The simple structure makes it possible to rotate.

Further, since the square pillar 23a is formed at the other end 23 of the extruded screw rod 20, it is easy to engage with a tool for rotation (eyeglass wrench, hexagon spanner, etc.), and the operation is easy and quick. Become. Further, since the square screw 22 is formed on the extruded screw rod 20, the durability is excellent, and the extruded screw rod can be easily rotated during bending.
And since it can be made into the minimum magnitude | size according to the intensity | strength of the pipe body to be bent, it becomes possible to accelerate | stimulate weight reduction and the simple bender which is easy to carry is obtained.

  Since the present invention has the above-described configuration, it is excellent in durability and workability and can be easily carried. Therefore, in order to bend pipes of various sizes at various work sites (for example, shipyards). It can be widely used as a simple vendor.

The perspective view which shows the simple vendor which concerns on embodiment of this invention. The top view which made the cross section the part which shows the simple vendor which concerns on embodiment of this invention.

Explanation of symbols

1 Simple vendor
10 Bending shoe 11 Grover
12 Essentially fan-shaped key 13 Cylindrical part 13a Cup part (cylindrical part with bottom)
13b Tubular part (no bottom)
13c Inner circumferential groove 13d Bottom 20 Screw rod 21 One end 21a Approximate spherical surface 21b Outer circumferential groove 22 Square screw 23 Other end 23a Square pillar 30 Screw receiver 40 T-shaped body 41 Horizontal portion 42 Vertical portion 50a Bending support 50b Bending Support 60 clips

Claims (5)

A simple bender for bending pipes,
A substantially fan-shaped bending shoe having a circular arc-shaped groove that allows the tube to enter the outer periphery;
An extrusion screw rod whose one end is gripped by the bending shoe at the position of the substantial sector of the bending shoe;
A screw receiver to which the extruded screw rod is screwed;
A T-shaped body including a vertical portion to which the screw receiver is fixed and a horizontal portion having bending supports formed at both ends;
The bending shoe is rotatable with respect to the axial center of the extrusion screw rod, and the bending shoe that advances by the rotation of the extrusion screw rod pushes the tube supported by the bending support. A simple bender characterized by bending the tube. A cylindrical portion into which the one end of the extruded screw rod can enter is formed at a substantial fan-shaped position of the bending shoe,
The one end of the extruded screw rod is formed in a substantially spherical shape,
2. The simplified bender according to claim 1, wherein a substantially spherical end portion of the extruded screw rod comes into contact with a bottom surface of the cylindrical portion of the bending shoe. The one end portion of the extruded screw rod is allowed to enter a substantial position of the fan-shaped shoe of the bending shoe, and a cylindrical portion having an annular inner circumferential groove is formed on the inner circumference.
An annular outer circumferential groove is formed on the outer periphery at the one end of the extruded screw rod,
In the state where the one end portion of the extruded screw rod enters the cylindrical portion, a slip-preventing C-clip that enters both the inner circumferential groove and the outer circumferential groove is disposed. The simple vendor according to claim 1 or 2.   At the other end opposite to the one end that grips the bending shoe of the push screw rod, at least a pair of opposed planes are formed on the outer periphery to facilitate the engagement of the tool for rotation. The simplified vendor according to any one of claims 1 to 3.   The simple bender according to any one of claims 1 to 4, wherein a square screw is formed on the extruded screw rod.

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