JPH0127812B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the field of bending technology for rectangular wire rods used for frame lines of spring structures such as automobile seats.

Accordingly, the present invention provides a structure in which the seed rectangular wire is clamped and fixed to a pair of first and second clamp rollers, and the first and second arms equipped with both clamp rollers and the first and second handles are arranged alternately. This invention relates to an apparatus for rotating and bending along the diameter of the outer roller within a predetermined plane by an operation, and in particular, the first and second clamp rollers are provided in a first arm, or
The first and second spur gears that mesh with each other are eccentrically provided, and are inserted and clamped by the first and second clamp rollers having grooves corresponding to the rectangular wire rod, and the first and the second rotating shaft, the paths of the first and second arms can be selectively switched so that the rotational force transmission path of the second rotating shaft is transmitted with one of the first and second clamp rollers as the center of rotation, and the biasing shaft The drive shaft is detachable from the cylindrical first rotation shaft, and the positioning shaft is loosely inserted into the second rotation shaft, and the drive shaft and the positioning shaft are moved back and forth exclusively by the switching arm. This invention relates to an apparatus for bending a rectangular wire rod.

<Prior art> As is well known, for example, car seats or
There are many furniture beds, seats, etc. that use springs as cushioning materials, and these types of spring structures use flat wire rods with a rectangular cross section made by crushing wire rods as frame lines. When used as a spring structure, it is necessary to bend the wire into a predetermined radius shape along a rectangular plane.

To do this, a manual bending jig 1 as shown in FIGS. 1a and 1b has been used, and the first clamp roller 3 is inserted into the surface plate 2, and the first clamp roller 3 is inserted in opposite direction to the clamp roller 3. By inserting and clamping a rectangular wire 5 between the second clamp rollers 4 and rotating a handle 6 integrally fixed to one of the rollers 3, a bending reaction force is applied to the block 7 of the surface plate 2. It was then bent and bent.

<Problems to be Solved by the Invention> However, in this type of manual bending jig 1, firstly, the bending direction of the rectangular wire 5 of the workpiece is determined in one direction, so that it is difficult to bend the rectangular wire 5 in the opposite direction. When machining, the workpiece 5 must be reversed, resulting in extremely poor workability, and in the case of long materials, the efficiency is significantly reduced.

Furthermore, since the relative positions of the pair of first clamp rollers 3 and second clamp rollers 4 are set and determined in advance, there is also the problem that it is difficult to insert or pull out the rectangular wire 5.

The purpose of this invention is to solve the problems of bending rectangular wire rods based on the above-mentioned prior art, and to solve the problem of bending of rectangular wire rods based on the above-mentioned prior art.
Bending can be easily done in any counterclockwise direction, and the pair of first and second clamp rollers are opened and closed by eccentric shafts, making it easy to insert and remove rectangular wires, improving work efficiency. It is an object of the present invention to provide an excellent rectangular wire bending device that can improve the bending process of rectangular wire rods, thereby benefiting the field of processing technology application in the machine manufacturing industry.

<Means/effects for solving the problem] In order to solve the above-mentioned problem, the structure of the invention of this application, which is based on the scope of the above-mentioned patent claims, is to solve the above-mentioned problem. opening a lock arm on a first rotating shaft, opening a pair of clamp rollers through the engagement of a first spur gear on the first rotating shaft with a second spur gear on a second rotating shaft; Set the rectangular wire in the square groove of the clamp roller, fix the above-mentioned lock arms to both rotating shafts, fix the rectangular wire in the square groove of the clamp roller, and in this state switch the switching pin to connect one rotating shaft to the other clamp roller. The wire rod is connected to the wire rod and the handle is rotated to bend the rectangular wire rod, and the reverse bending process is performed in the opposite direction to the above operation, thereby making it possible to bend in both directions at any time without causing buckling. It is.

<Embodiment> Next, an embodiment of the present invention will be described below based on the drawings starting from FIG. 2a. still,
The rectangular wire 5 is used in the same manner as in FIGS. 1a and 1b.

In Figures 3a and 3b, numeral 8 is a bending device for rectangular wire 5, which constitutes the gist of the present invention, and is used for forming the frame line of cushion springs for automobile seats; As shown in the figure, a bearing box 10 is provided on the frame 9, and a cylindrical first rotating shaft 11 and a second rotating shaft 12 are rotatably mounted through predetermined bearings. A first ring member 14 to which a first handle 13 is fixed is fixed to the lower part of the former via a key 15.

On the other hand, the first arm 1
8 is offset to the cylindrical first rotating shaft 11 and fixed by a bolt 16, and a positioning hole 17 is formed concentrically with the cylindrical first rotating shaft 11.

Further, a shaft 19 is provided inside the cylindrical first rotating shaft 11 and is slidable concentrically in the positioning hole 17 .

A second ring member 1 with a second handle 13' fixed to the lower part is attached to the cylindrical second rotating shaft 12.
4' is fixed via a key 15', and on its inner surface, a first inner spline 20 is provided at the lower part, and a drive shaft 22 having an outer spline 21 at the upper part is connected to both inner and outer splines 20, 21. They are inserted into the interior so that they can engage with each other and are slidable relative to each other.

A first arm 18 having a substantially rectangular shape in plan view
On the other side, a cylindrical bias shaft 23 is supported via a bearing, and the second inner spline 2
4 can be freely engaged with and disengaged from the outer spline 21 of the drive shaft 22, and is fixed to the cylindrical biasing shaft 23 with a bolt 26 to an upper second arm 25 which is generally rectangular in plan view.

A short cylindrical flange 27 fixed to the lower part of the other side of the deflection axis of the second arm 25 is provided with a positioning hole 28 that is concentric with the positioning hole 17 of the first arm 18. A shaft 19 is inserted through the positioning hole 17.

Incidentally, the flange 27 and the arm 18 are slightly separated from each other as shown in FIG. 3b.

Inside the second arm 25 are a first spur gear 29 having centers offset outward from the centers of the cylindrical first rotating shaft 11 and the second cylindrical rotating shaft 12, and A second spur gear 29' is connected to the first shaft 30 and the second shaft 3 provided on the arm 25.
0', the first shaft 30 and the second shaft 3
0' is offset with respect to the first spur gear 29 and second spur gear 29', respectively, but coincides with the cylindrical first rotation shaft 11 and the second rotation shaft 12. A first central clamp roller 32 and a second central clamp roller 32' are provided and fixed.

The first clamp roller 32 and the second clamp roller 32' are upper and lower first rollers 33, 34,
The second rollers 33' and 34' are held by bolts 36 via shims 35 that form a gap A that is a square groove into which the rectangular wire 5 is inserted.

A lock arm 38 is attached to the upper end of the first shaft 30 via a pin 37 to restrain the relative rotation of the first clamp roller 32 and the second clamp roller 32'. 32' with a stopper pin 39.

Further, a horizontal bearing 40 is provided at the lower part of the frame 9, as shown in FIG. 3a, and supports a third shaft 43 fixed to the base 42 of the switching handle 41. A switching arm 44 fixed to the first narrow diameter portion 4 at the lower end of the first shaft 19 and the drive shaft 22
5 and the second narrow diameter portion 45', the first shaft 19 and the drive shaft 22 are raised and lowered alternately and exclusively.

In the above configuration, the first clamp roller 32
A shim 35 corresponding to the thickness of the processed rectangular wire 5 is interposed on the second clamp roller 32', and the switching arm 44 is moved in a predetermined direction by operating the switching handle 41, as shown in FIG. 3b. The drive shaft 22 is tilted (upward rightward in the figure) and raised, and the first inner spline 20 of the second rotating shaft 12 whose outer spline 21 is cylindrical, and the second arm 2
The second internal spline 24 of the biasing shaft 23 of No. 5 is set so as to straddle and mesh with the second internal spline 24.

Therefore, as shown in Fig. 2a, the stopper pin 3
9, remove the lock arm 38 and attach the first shaft 30.
When rotated outward by 90 degrees around , the first axis 3
2a, the first spur gear 29 integral with the first spur gear 29 pivots, causing the second spur gear 29' meshing with the first spur gear 29 to pivot, so that the first spur gear 29', as shown in FIG. The first clamp roller 32 and the second clamp roller 32', which are biased to the second spur gear 29 and the second spur gear 29', are spaced apart from each other to allow the rectangular wire 5 to be inserted sufficiently therethrough.

Therefore, the rectangular wire 5 is moved to the first clamp roller 3.
The lock arm 38 is inserted into the square groove between the clamp roller 2 and the second clamp roller 32', is engaged with a bending reaction force receiving block (not shown), and is stopped at a predetermined bending position, as shown in FIG. 2b. is fixed to the second clamp roller 32' with a stopper pin 36.

By doing this, the first spur gear 29
As shown in FIG. 2b, the first clamp roller 32 and the second clamp roller 32' are engaged with each other through the meshing of the second spur gear 29' and the rectangular wire 5 is inserted into their square grooves.
to clamp.

In this prepared state, the first shaft 19 is not inserted into the positioning holes 17 and 28 of the first arm 18 and the upper second arm 25, so the first shaft 19 is not inserted into the positioning holes 17 and 28 of the first arm 18 and the upper second arm Arm 25 is not locked.

Therefore, when the handle 13' is turned, the rotational torque applied to the second cylindrical rotating shaft 12 causes its first internal spline 20 to be applied to the external spline 21 of the drive shaft 22 with which it is engaged, and to the bias shaft 23. The signal is transmitted, causing the upper second arm 25 to pivot.

In the upper second arm 25, the first spur gear 29 and the second spur gear 29' are locked by the lock arm 38 via the first clamp roller 32 and the second clamp roller 32'. The first clamp roller 32 rotates around the second clamp roller 32' as indicated by the arrow shown in FIG. 2c.

Therefore, as shown in FIG. 2c, the rectangular wire 5 is bent in a predetermined manner, and then the lock arm 38 is opened by the reverse operation to the above, and the first clamp roller 32 and the second clamp roller 32' are opened. It is released and the rectangular wire 5 is moved forward for the next reverse bending.

Next, in order to bend the rectangular wire 5 after the movement in the opposite direction, the switching handle 41 is switched and turned in the opposite direction, the switching arm 44 is tilted opposite to the state shown in FIG. 3b, and the drive shaft 22 is lowered. The outer spline 21 is separated from the second inner spline 24 of the biasing shaft 23 (although the first inner spline 20 and outer spline 21 are engaged), and the first arm 18 and the cylindrical second The second rotating shaft 12 is disconnected.

On the other hand, the shaft 19 rises and the positioning hole 17 of the first arm 18 and the upper second arm 25,
28 and the first arm 1 together with the biasing shaft 23
8 and the second arm 25 are locked together.

Therefore, when the first handle 13 is turned in the opposite direction to the second handle 13', the turning torque is transmitted from the cylindrical first rotating shaft 11 to the first arm 18 via the bolt 16, first arm 18
from the upper second arm 25 via the biasing shaft 23
can be conveyed to.

As a result, the second clamp roller 32' turns around the first clamp roller 32 as shown in FIG. 2d, and bends the rectangular wire 5 in the opposite direction.

Then, the lock arm 38 is removed, the first clamp roller 32 and the second clamp roller 32' are opened, and the rectangular wire 5 is moved forward to perform the next bending process.

It goes without saying that the embodiments of the present invention are not limited to the above-described embodiments, and various embodiments may be adopted, such as, for example, the clamp roller is provided with an elastic spring instead of a shim. .

<Effects of the Invention> As described above, according to the present invention, in the bending process of rectangular wire rods, rightward bending and leftward bending can be freely selected by simply switching the handle. It is possible to bend the rectangular wire as desired while it is set without having to remove it or turn it over, making it extremely easy to work and improving efficiency.Moreover, since there is no need to remove it, it is possible to maintain uniform accuracy. The effect is produced.

In addition, since the bending direction can be selected simply by switching the handle, the operation is easy and the device can be made compact.

Since the first and second clamp rollers, which are provided on the second arm and have a square groove for the rectangular wire, can be freely locked by the lock arm, it is possible to insert and set the rectangular wire into the rectangular groove. Furthermore, during bending, rotation of the first and second clamp rollers can be prevented, and displacement of the rectangular wire can also be prevented by the square groove engagement.

In addition, by providing the first and second clamp rollers at eccentric positions with respect to the first and second gears that mesh with each other, the meshing of the gears can be adjusted by rotating the second clamp roller via the lock arm. The first and second clamp rollers are separated from each other through the clamp roller, and the excellent effect that the work wire can be inserted, set and clamped reliably is achieved.

Furthermore, by connecting the second arm equipped with gears to the other first arm with a biased shaft,
The first and second arms are allowed to rotate relative to each other through the biasing shaft. Therefore, by connecting one rotating shaft having a handle and the biasing shaft through a drive shaft, the second arm can be rotated in one direction. There is an effect that bending can be performed by rotating the clamp roller relative to the first clamp roller.

By making it possible for the shaft that is loosely inserted into the first rotating shaft to pass through the positioning hole of the first arm and lock the first and second arms, the second clamp roller is centered. This has the effect that the first clamp roller can be rotated in the opposite direction.

By selectively and exclusively raising and lowering the shaft, the drive shaft, and the switching arm, there is an effect that bending in both directions can be reliably selected exclusively.

[Brief explanation of drawings]

1a and 1b are a plan view and a BB sectional view of a rectangular wire processing tool based on the prior art, and FIG. 2a and the following are explanatory views of an embodiment of the present invention.
Fig. 2b is a process diagram of setting and clamping a rectangular wire, Figs. 2c and 2d are process diagrams of bending, Fig. 3a is a side view of the device, and Fig. 3b is a sectional view thereof. 13...first handle, 13'...second handle, 11...cylindrical first rotating shaft, 12...
Cylindrical second rotating shaft, 18...first arm, 2
5...Second arm, 32...First clamp roller, 32'...Second clamp roller, 38...
... Lock arm, 23 ... Biasing axis, 9 ... Frame, 22 ... Drive shaft, 17, 28 ... Positioning hole, 19 ... Axis, 44 ... Switching arm, 29 ...
First spur gear, 29'...second spur gear.

Claims (1)

[Claims] 1. A rectangular wire bending device in which an arm provided on a rotating shaft linked to a handle is equipped with a clamp roller for bending the rectangular wire, in which a biasing shaft is pivotally supported on the first arm. , a second arm is eccentrically fixed to the eccentric shaft above the first arm, and the second arm is provided with first and second spur gears that mesh with each other, and the second arm is provided with first and second spur gears that mesh with each other. Each of the second spur gears is provided with first and second clamp rollers that clamp the rectangular wire at eccentric positions, and the frame has first and second cylindrical rotation shafts. each having first and second handles, the second cylindrical rotating shaft having a spline on its internal drive shaft for connection to the spline of the biasing shaft; The rotating shaft has a shaft having shaft ends that engage with positioning holes corresponding to the first arm and the second arm, and the drive shaft and the shaft are linked to a switching arm. A device for bending flat wire rods.