JPH06190455A - Bending device - Google Patents

Abstract

PURPOSE:To execute bending simply and easily in a bending device by which bending is performed continuously on a material to be worked. CONSTITUTION:The device is provided with a first rotary body 11 which is in contact with the inner side of a work 6 to be bent and is rotatably movable and plural second rotary bodies 12 which are set in contact with the outer side of the work to be bent in rotatably movable and set at prescribed intervals from the first rotary body; and the plural second rotary bodies are set at prescribed intervals from the body 11 and also made to approach the first rotary body 11 so that the work in contact with the first rotary body 11 is deformed into a bending state B from a straight state A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus suitable for continuously bending a long work piece into a coil shape, or to a bending apparatus capable of bending a coiled piece into a linear shape.

In order to protect an optical fiber, which is a signal transmission line, from a strong seawater pressure, a submarine cable is constructed so that a pressure is not exerted by arranging a copper pipe on the outer side of the optical fiber as a center. This copper pipe also has a function as a power supply line to the relay device in the submarine relay.

Further, the structure is such that a pressure resistant member is arranged outside and covered with an insulating coating or a tensile strength wire, but in order to connect with the inside of the pressure resistant casing of the submarine repeater, a copper pipe of an appropriate length for the connection work. It is necessary to make it a state part and to wind and store this part in a coil shape.

In order to wind in such a coil shape, a suitable core material may be prepared and wound around it.
In the conventional coaxial cable, the diameter of the copper pipe as the outer conductor was about 6 mmφ and it was relatively flexible, so that it could be wound directly by hand. However, in the case of an optical fiber, the diameter of the protective copper pipe is about 12 mmφ, and the rigidity is so great that it is difficult to wind it directly by hand.

To accurately wind the copper pipe, it is possible to use a winding device having a power source, but it takes a large amount of time. Therefore, if there is a device that can be easily and easily wound without power. It is very convenient.

[0006]

Bending apparatus 7 as shown in FIG.
Is an application of the principle of leverage, a circular bending die 2 attached to the tip of the fixed lever 1 and this circular bending die 2
The sliding die 4 connected by the connecting arm 3 around the center is configured to be rotatable along the circumference of the circular bending die 2. A lever 5 is attached to the sliding die 4.

With the sliding die 4 and the lever 5 positioned as indicated by the chain double-dashed line, a copper pipe portion of the outer conductor, which is a linear coaxial cable 6, is provided between the circular bending die 2 and the sliding die 4. Insert and place. The coaxial cable 6 is in a straight line state indicated by a two-dot chain line extending at the tip of the straight line portion.

With the fixed side lever 1 fixed, the lever 5
Is rotated in the direction of the arrow, the sliding die 4 moves along the outer peripheral surface of the circular bending die 2, and the coaxial cable 6 is moved to the outer peripheral surface of the circular bending die 2 as shown by the solid line in the drawing. It is bent into a shape that follows. Coaxial cable 6 of course
It is necessary to fix and support the straight line part of. The circular bending die 2 and sliding die 4 are provided with appropriate arcuate grooves so that the coaxial cable 6 does not come off.

[0009]

The bending device 7 described above.
According to the above, since the coaxial cable 6 is bent along a circular bending die, the bending radius of the coaxial cable 6 is constant, and in order to obtain a different bending radius, another bending device is prepared or the circular bending die 2 is replaced. There is a need. It is not possible to set an intermediate bend radius.

Since the principle of leverage is applied, long levers 1 and 5 are required and a wide working space is required. If the cable is bent at once, the coaxial cable 6 may be deformed or the surface may be scratched, so that it is necessary to gradually push and bend the cable, which requires time.

The maximum bending state is up to U-shape, and further bending cannot be performed. Therefore, it is applied to local bending as shown in FIG. 14, and cannot be bent into a coil shape.

As described above, the conventional bending apparatus 7 has various problems, and the coaxial cable 6 cannot be continuously bent into a coil shape. In view of the above problems, it is an object of the present invention to provide a bending apparatus capable of bending a coil and varying the bending radius. Furthermore, the present invention also includes the provision of a bending apparatus capable of making a coil-shaped member linear.

[0013]

According to the first aspect of the present invention, the object of the present invention for solving the above-mentioned problems is to rotate and move while being in contact with the inside of a workpiece to be bent. The first rotating body to be obtained and the first rotating body are provided with a plurality of second rotating bodies capable of rotating in contact with the outside of the object to be processed at a predetermined interval, and the plurality of second rotating bodies are provided. The body is a bending apparatus which is separated from the first rotating body by a predetermined distance and is brought closer to the first rotating body so that the body to be processed that is in contact with the first rotating body is bent more than the straight state.

According to the first aspect, there is provided a bending apparatus in which the number of the second rotating bodies is two. According to a second aspect, the bending apparatus is provided with a rotary handle and which can be moved on the workpiece by rotating the rotary handle.

According to the third aspect, at least one of the second rotating bodies is a bending apparatus capable of varying a distance from the first rotating body. According to the second aspect of the present invention, the first aspect capable of coming into contact with the outer side of the workpiece to be bent and rotating.
And a plurality of second rotating bodies capable of rotating in contact with the inside of the object to be processed at a predetermined interval, and the plurality of second rotating bodies have a predetermined distance. The bending apparatus is located closer to the first rotating body so that the workpiece, which is spaced apart and is in contact with the first rotating body, is located at a position where it is in a linear state rather than in a bent state.

[0016]

According to the bending apparatus of the first aspect of the present invention described above, the workpiece is inserted between the first rotating body and the second rotating body to rotate the first rotating body, or By moving the workpiece, the workpiece is bent into an arc having a predetermined radius. When it is continued, it is bent into a coil.

According to the first aspect, at least two second rotating bodies are sufficient. According to the second aspect, it is possible to perform the bending work by rotating the rotary handle by hand to rotationally move the work piece or by moving the work piece. According to the third aspect, the first rotating body and the second rotating body
Since the distance between the rotating body and the rotating body can be far and near, an arbitrary bending radius can be obtained.

According to the bending apparatus of the second aspect of the present invention, it is possible to bend an object to be processed that is bent in an arc shape or a coil shape into a straight line. Since the first invention and the second invention are composed of common elements, they can be combined.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The bending apparatus of the present invention will be described below in detail with reference to specific embodiments.

FIG. 1 shows a principle side view of an embodiment of the first aspect of the present invention. According to FIG. 3A, the work piece will be described as a coaxial cable (same in each of the following embodiments) 6 for easy understanding. The first that can contact the inner side of the bend of the coaxial cable 6 to be bent and can rotate and move
The rotating body 11 and the first rotating body 11 are composed of two second rotating bodies 12 that can rotate while coming into contact with the outside of the bending of the coaxial cable 6 at a predetermined interval.

The central axis 13 of the first rotating body 11 is the support plate 1
4 and the central axis 15 of the second rotating body 12 is supported by the supporting plate 14, respectively. The two second rotating bodies 12 are separated by a predetermined distance in the left-right direction of the paper surface,
The coaxial cable 6 in contact with the first rotating body 11 is placed in a straight line state A
The first rotating body 11 is positioned so as to be in a state of bending B more than
The central shaft 15 is fixed at a position close to. The first and second rotating bodies 11 and 12 are rotatable around the respective central axes 13 and 15.

The sizes of the diameters of the first and second rotating bodies 11 and 12 are not directly related, but in this embodiment, the size of the first rotating body 11 is larger than that of the second rotating body 12. The sizes of the second rotating bodies 12 are set to be the same.

With the above-mentioned structure, the coaxial cable 6 in the linear state A is inserted and arranged between the first rotating body 11 and the second rotating body 12 in the state B in which the tip is bent. The part in this state B is elastically in contact with each of the rotating bodies 11 and 12 with a frictional force.

When the first rotating body 11 is rotated in the direction of the arrow, the coaxial cable 6 is moved in the same direction along the surface of the first rotating body 11, and the second rotating body 12 is rotated in the direction of the arrow. To do.

The coaxial cable 6 is moved and bent by frictional force in the rotating direction of each of the rotating bodies 11 and 12. After passing through the rotating bodies 11 and 12, it is slightly restored by elasticity but bends in an arc shape.

By continuously performing the bending work in this manner, the bending work is performed in a circular shape as shown in FIG. Although the bent tip reaches the linear portion A, the tip portion can be biased to have a spiral shape without collision. Needless to say, it will be easily understood that a coil is formed by subsequently performing bending.

The bending apparatus 1 is in the state shown in FIG.
The coaxial cable 6 is bent, moved in the direction of the arrow and bent by rotating the rotators 11 and 12 with the posture of 0 fixed, but the bending device 10 moves with rotation. The same thing can be done arbitrarily depending on the situation.

FIG. 2 is a side view of one embodiment of the first aspect of the present invention. FIG. 3 is a front view, FIG. 4 is a sectional view taken along line aa of FIG. 2 and FIG. A cross section is shown in FIG. The bending apparatus 20 has a first rotary body 21 and two second rotary bodies 22, and the first rotary body 21 is provided with a fixed arm 23 to which one second rotary body 22 is attached. The rotary handle 24 is attached with a screw 25 to be integrated.

The rotary handle 24 has two stages of shaft portions 26 and 27, and the fixed side arm 23 is attached to the shaft portion 27 having a thin tip.
And the first rotating body 21 are fitted and fixed. A rotating arm 28 is fitted to the thick shaft 26 in the middle,
A rotating arm 28 is rotatable around the shaft portion 26.

The other second rotating body 22 is attached to the tip of the rotating arm 28. The second rotating body 22 is rotatably fitted to a shaft 29 that is press-fitted and fixed to the arms 23 and 28, and is prevented from coming off by a C-shaped retaining ring 30.

Circular arc-shaped grooves 31 and 32 are formed around the first and second rotating bodies 21 and 22, respectively. The radius of the circular arc of the grooves 31 and 32 is preferably the same as the radius of the cross section of the coaxial cable 6, but it is not always necessary to match the radius, and a larger radius is convenient because it is versatile as shown in FIG.

The periphery of the fixed side arm 23 and the rotating arm 28 fitted to the shaft portions 26 and 27 is circular like the rotary handle 24, and they overlap with each other and slide. It is configured to be movable.

A positioning pin 34 is fitted in a through hole 33 penetrating the first rotary body 21 and the fixed arm 23, and is biased by a spring 35 toward the rotary handle 24. The spring 35 is supported by a pressing plate 37 housed in the through hole 33 and attached with a screw 36.

An end portion of the positioning pin 34 penetrates the pressing plate 37 and is exposed as a knob portion 38 so that the positioning pin 34 can be pulled out. Further, the tip on the inner side is configured to be fitted into a positioning through hole 39 opened in the rotating arm 28 so as to fix the position of the rotating arm 28.

As is apparent from FIG. 2, the positioning through holes (shown by dotted lines) 39 formed in the rotating arm 28 are formed at six positions on the same circular arc, and two second rotary members are provided. The positioning pin 34 is fitted at a position where 22 is closest to each other. The coaxial cable 6 is indicated by a chain double-dashed line between the first rotating body 21 and the second rotating body 22.

With the above construction, the positioning pin 34 is pulled out by holding the knob portion 38 and pulled out from the positioning through hole 39, and the rotary arm 28 is rotated around the shaft portion 26 to be positioned in the second through hole 39. Fit the pin 34. This state is shown in FIG. 5A, and the mutual distance between the second rotating bodies 22 is widened accordingly. In this way, the coaxial cable 6 is inserted between the first rotary body 21 and the second rotary body 22. In this case, the coaxial cable 6 is appropriately bent and inserted as shown in the drawing.

The coaxial cable 6 is composed of the respective rotating bodies 21,
Since it fits in the grooves 31 and 32 of 22, it does not come off in the lateral direction. The coaxial cable 6 elastically contacts the grooves 31 and 32 to generate a frictional force.

When the first rotating body 21 is rotated in the direction of the arrow, the coaxial cable 6 is similarly moved in the direction of the arrow and leftward in the drawing. As a result, in the state of passing through the second rotating body 22 on the left side, the bending processing is performed into the circular arc state B having the radius R ₁ . The coaxial cable 6 on the right side of the second rotating body 22 on the right side is in the linear state A.

The first rotating body 21 can move in contact with the coaxial cable 6 by the frictional force acting between the first rotating body 21 and the coaxial cable 6. The second rotating body 22 is also contact-rotated as it moves. In this way, the first rotating body 21 contacts the inside of the bend of the coaxial cable 6, and the second rotating body 22 contacts the outside of the bend of the coaxial cable 6.

Such a bending process is applied to each of the rotating bodies 21 and 22.
Although the same result can be obtained by pushing the coaxial cable 6 in the direction, it is preferable to rotate the first rotating body 21. In any case, the rotating bodies 21 and 22 are coaxial cables 6
There is no change in moving relative to touching.

In the above, the positioning through hole 39 of the rotating arm 28 is selected from the first position to the second position. However, the state in which the fourth position is selected and the positioning pin 34 is fitted is shown in FIG. 5B.
Shown in. The distance between the second rotating bodies 22 becomes wider.

By bending the coaxial cable 6 as shown in FIG. 3B, the bending radius becomes R ₂ .
It can be bent to a diameter much smaller than R _{1 in} the case of FIG. This means that the position of the positioning through hole 39 can be selected and the positioning pin 34 can be fitted thereto to perform stepwise bending with an arbitrary radius.

By continuously performing the state of FIG. 5 (b), the coaxial cable 6 can be formed into a coil shape as shown in FIG. FIG. 6 shows a state viewed from the side of the rotary handle 24. At this time, if the straight portion A of the coaxial cable 6 is sequentially fed as the rotary grip 24 of the bending device 20 is rotated, the bending device 20
Bending can be done without moving the posture.

The work can be carried out smoothly by performing the winding and bending work by pulling the tip of the wound portion B of the coaxial cable 6 and pulling apart the coils. FIG. 7 is a side view of an embodiment of the second aspect of the present invention, and FIG. 8 is a sectional view taken along line cc of FIG. 2 to 5 in the bending apparatus 40 of this embodiment is not the positioning pin 34 and the positioning through hole 39, but instead of this, an arcuate hole 41 is provided in the first rotating body 21 and the stationary arm. The screw hole 42 is formed in the circular portion 23 of the rotary arm 28.

By inserting a bolt 43 into the arc-shaped hole 41, screwing it into the screw hole 42, and tightening it, the position of the rotating arm 28 can be fixed at an arbitrary position within the range of the arc-shaped hole 41. It was done. The reference numeral 44 is a washer.

The other configurations are the same as those in the previous embodiment, and the first rotary body 21, the second rotary body 22, the fixed arm 23, the rotary handle 24, etc. are completely the same, so the same reference numerals are used. The description is omitted here only.

In the constitution of this embodiment, the stepwise positioning is carried out in the previous embodiment, whereas the turning range of the turning arm 28 is steplessly set to any position with respect to the range of the arcuate hole 41. Can be set.

Since the coaxial cable 6 is slightly elastic and is restored to a large radius after being bent, it is important to set the movable arm 28 to be wide open and the bending radius to be small in consideration of that amount.

By using a thumbscrew instead of a hexagonal head for the bolt 43, it becomes possible to directly fix it by hand without using a tool such as a spanner. FIG. 9 shows a side view of an embodiment of the third aspect of the present invention, and FIG. 10 shows a sectional view taken along line d-d of FIG. According to the bending apparatus 50 of this embodiment, the first rotating body 21 has the rotating handle 24 with the L-shaped arm 51 interposed therebetween.
It is attached by a screw 25 and integrated. The shaft portion 26 of the rotary handle 24 is positioned by fitting the hole 52 of the L-shaped arm 51 and the concave hole 53 of the first rotary body 21.

The shaft 29 is press-fitted and fixed to the shorter arm 54 of the L-shaped arm 51, and the second rotating body 22 is rotatably fitted therein. The second rotary body 22 is supported by a C-shaped retaining ring 30 attached to the shaft 29 so as not to come off.

A vertically long hole 56 is formed in the longer arm 55, and a movable shaft 57 into which the second rotary body 22 is fitted is attached to the long hole 56. The movable shaft 57 has a shaft portion 58 into which the second rotating body 22 is fitted and which is rotatable, and a surface portion 59 whose both side surfaces are parallel to each other so as not to rotate by fitting into the elongated hole 56 and a screw portion at the tip. It consists of 60.

A nut 62 is fitted to the threaded portion 60 via a washer 61. The C-shaped retaining ring 30 is attached to the shaft portion 58.
Is fitted so that the second rotating body 22 does not come off. The tightening of the nut 62 is fixed by the stepped portion formed by the surface portions 59 on both sides of the shaft portion 58 coming into contact with the surface of the longer arm 55, and the second rotating body 22 is tightened and fixed. There is no.

Referring to FIG. 9, the second rotary body 22 attached to the longer arm 55 is replaced with the first rotary body 21.
When fixed at the position C away from the first rotating body 21
The coaxial cable 6 inserted between the second rotary body 22 and the second rotary body 22 is in the linear state A, and when fixed at the position D closest to the first rotary body 21, the coaxial cable 6 is bent. It is understood that the state B is set.

Therefore, by fixing the second rotating body 22 at an arbitrary position on the way of the long hole 56, it is possible to perform bending work having an arbitrary bending radius. Of course, by rotating the rotary handle 24, the first rotating body 21 is moved relative to the coaxial cable 6 and is thereby bent.

Also in this embodiment, since the coaxial cable 6 is slightly elastic and has a large radius after being bent, it is important to set the bending radius to be small in consideration of that amount.

In this embodiment, the second rotary body 22 is fixed in position with respect to the shorter arm 54, but it is also possible to arbitrarily move this portion like the longer arm 55. Yes, longer arm 5 if movable
The length of 5 can be halved, and the bending radius can be made smaller. If the nut 62 is a wing nut, a tool such as a spanner is not needed.

FIG. 11 shows a side view of an embodiment of the second invention of the present invention. This embodiment is basically the first shown in FIG.
The second aspect of the invention is applicable. Therefore, the reference numerals of FIG. 7 are applied to the respective components, so refer to the description regarding FIG. 7. See also FIGS. 8 and 8 for cross-sectional views.

This bending device 70 is provided with the first rotary body 21.
And the second rotating body 22, one of the second rotating bodies 22 is rotatably supported by the fixed arm 23, and the other second rotating body 22 is rotatably supported by the rotating arm 28. You are free.

A straight metal rod (not shown) having the same diameter as the coaxial cable 6 is prepared, inserted between the first rotary body 21 and the second rotary body 22, and the bolt 43 is loosened to rotate. The arm 28 is rotated so that the groove 31 of the first rotating body 21 and the groove 32 of the second rotating body 22 are in contact with the surface of the metal rod, and the bolt 43 is fixed at the tightened position.

While pulling out the metal rod, the coaxial cable 6 in the bent state B is inserted instead of being inserted, with the tip portion thereof being substantially straight. The coaxial cable 6 is elastically brought into contact with the frictional force. This state is shown in FIG.

A rotary handle 24 located on the back side of FIG.
Is rotated in the direction of arrow 71 in the figure to relatively move the coaxial cable 6 in the direction of arrow 72, the second rotating body 22 is also rotated in the direction of arrow.

The positions of the first rotary body 21 and the second rotary body 22 are positioned so that the bent coaxial cable 6 can be bent straight.
Bent processing is performed from the bent state B to the straight state A. That is, the first rotating body 21 comes into contact with the outside of the bent state B of the coaxial cable 6 to rotate and move, and the second rotating body 22.
Is fixed in position via a predetermined interval so as to come into contact with the inside of the bent state B of the coaxial cable 6 and rotate.

Since the rotating arm 28 can set the position of the second rotating body 22 to an arbitrary position, it can be fixed at an appropriate position in response to a change in the diameter of the coaxial cable 6. FIG. 12 shows well how the coaxial cable 6 wound in a coil shape B is brought into the linear state A. FIG. 12 shows a state viewed from the side of the rotary handle 24. In this case, the bending portion 70
It is possible to work with the posture of as a fixed position.

As described above, the present invention can be applied by reversibly applying both the first invention and the second invention. It is included in the present invention that all the aspects of the present invention can be arbitrarily applied in combination with each other, and that a wide variety of actions and effects can be obtained by combining the respective variable parts. Is.

In addition, the manual operation by the rotary handle 24 has been described, but this is for the purpose of facilitating understanding of the description, and according to the present invention, a rotary structure using a drive source such as an electric motor is also included. In this case, it is preferable to set the first rotating body 21 in a rotating state and set the second rotating body 22 and each arm supporting the second rotating body 22 to a fixed position.

Although the object of the present invention has been described as a coaxial cable, it is not limited to a coaxial cable but can be applied to a pipe, other rod-shaped bodies and the like, and is versatile. Needless to say.

Although the number of the second rotating bodies has been described as two, the number is not limited to two, and the number of arms and the number of arms can be more than two, and the number can be more smoothly bent. It

[0068]

As described in detail above, the bending apparatus of the present invention has a simple structure and good operability and easy operation. Since the work piece is flexibly bent by the rotation of the rotating body, no abnormality such as deformation occurs in the work piece.

The bending state of an arbitrary radius can be set stepwise or steplessly regardless of the size of the rotating body, and the bending state can be reversibly changed to a linear state. It is versatile and can work in a small working space.

As described above, the practical effect is extremely remarkable when it is applied to the partial bending process or the continuous bending process of the rod material, the pipe material and the like.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the first invention of the present invention.

FIG. 2 is a side view of the first aspect of the first aspect of the present invention.

3 is a front view of FIG.

4 is a sectional view taken along the line aa and a sectional view taken along the line bb of FIG. 2;

5 is an explanatory diagram of the operation of FIG.

FIG. 6 shows a state in which a coaxial cable, which is a workpiece, is bent into a coil shape.

FIG. 7 is a side view of the second aspect of the first aspect of the present invention.

8 is a sectional view taken along line cc of FIG.

FIG. 9 is a side view of the third aspect of the first aspect of the present invention.

10 is a sectional view taken along line d-d of FIG.

FIG. 11 is a side view of an embodiment of the second invention of the present invention.

FIG. 12 shows a state where a coiled coaxial cable is bent linearly.

FIG. 13 Conventional bending apparatus

14 is an example of a state of being bent by the bending device of FIG.

[Explanation of symbols]

 6 coaxial cable 10 bending device 11 1st rotary body 12 2nd rotary body 14 support plate 20 bending device 21 1st rotary body 22 2nd rotary body 23 fixed side arm 24 rotary handle 28 rotation Arms 31, 32 Grooves 34 Positioning pin 39 Positioning through hole 40 Bending device 41 Arc hole 43 Bolt 50 Bending device 51 L-shaped arm 54 Shorter arm 55 Longer arm 56 Long hole 57 Movable shaft 70 Bending machine

Claims (5)

[Claims] 1. A first rotating body (11) (21) capable of coming into contact with the inside of a body (6) to be bent and rotating.
And a plurality of second rotating bodies (12) capable of being rotationally moved in contact with the outside of the object to be processed at a predetermined interval with the first rotating body.
(22), the plurality of second rotating bodies are located at predetermined positions and are in a position (B) in which the workpiece in contact with the first rotating body is bent more than in the linear state (A). A bending apparatus characterized in that the bending apparatus is brought close to the first rotating body. 2. The bending apparatus, wherein the number of the second rotating bodies (12) (22) is two. 3. The bending apparatus according to any one of claims 1 to 3, further comprising a rotary handle (24) for rotating the rotary handle to move the workpiece (6). A bending device characterized by being used. 4. The method according to claim 1, wherein at least one of the second rotating bodies (22) has a variable interval with respect to the first rotating body (21). The bending device described. 5. A first rotating body (21) capable of rotating and contacting the outside of a work piece (6) to be bent, and the first rotating body (21).
And a plurality of second rotating bodies (22) capable of rotating and moving in contact with the inside of the workpiece through a predetermined interval, and the plurality of second rotating bodies are separated by a predetermined interval. Bending that is closer to the first rotating body so that the workpiece that is in contact with the first rotating body is in a position in which it is in a linear state (A) rather than in a bent state (B) apparatus.