JPS646987Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to an automatic bending machine for various materials such as rods, pipes, and iron bands.It eliminates the use of rotating rollers, simplifies the structure, improves work efficiency, and saves labor. The purpose is to provide an automatic bending machine with

As shown in FIGS. 3 and 4, the conventional automatic bending machine has a rotating shaft 30 that rotates in forward and reverse directions driven by a motor.
An arm 31 is fixed to the arm 31, a rotating roller 32 is rotatably supported on the arm 31 via a rotating roller shaft 33, and a material platform 35 fixed to a fixing member 34 is provided above the arm 31, A bending die 36 is fixed on the upper surface of the material platform 35 at a position centered on the axis of the rotating shaft 30, and the bending material is bent to a certain length between the bending die 36 and the rotating roller 32. It is known that the bending material is bent along the outer peripheral surface of the bending die 36 by the pressing force of the rotating roller 32 by inserting the bending roller 32 into the bending die 36 and rotating the rotating roller 32 forward at a certain angle.

However, in the above-described conventional automatic bending machine, in addition to the bending die 36, a rotating roller 32 that rotates along the outer circumferential surface of the bending die 36 while pressing the bending material is required. There was a problem that the structure was complicated and manufacturing was troublesome.

In addition, when the bending material is finished bending at one location, it is necessary to insert the material between the rotating roller and the bending die in a size suitable for the next bending process,
The work efficiency was poor, school training was required, and the work was hard.

The present invention was devised in view of this point. In this invention, an arm is fixed to a rotating shaft that rotates forward and backward according to a motor, and a ratchet pawl is provided on the arm so that it can swing freely. A material platform fixed to a fixed member is provided between the arm and the ratchet pawl, a circular recess is formed on the upper surface of the material platform and at a position centered on the axis of the rotating shaft, and A support body which can be divided into two and which supports a ratchet gear freely in rotation is fixed in a circular recess, and a bending mold having a hook part capable of supporting a bending material is attached, and the center of the bending mold is aligned with the above-mentioned axis. The gist is that the ratchet pawl is positioned on the same line as the ratchet gear and is detachably fixed to the ratchet gear, and the ratchet pawl is freely engaged and detached from the ratchet gear.

Next, an embodiment of the automatic bending machine according to the present invention will be described based on the drawings.

Reference numeral 1 denotes a base plate fixed on a machine frame (not shown), in other words, a fixing member; a vertical through hole 2 is formed in the fixing member 1; A rotating shaft 3 is provided which rotates forward and backward by a mechanism (not shown), and an arm 4 is fixed to the upper part of the rotating shaft 3.
A ratchet pawl 5 is attached to the upper surface of the housing with a bolt 6 so that it can swing freely. Also, one end of the claw 5 is attached to the arm 4.
The other end of the tension spring 7 is connected to the other end of the tension spring 7, so that the ratchet pawl 5 receives a force in the direction of meshing with a ratchet gear to be described later.

Further, 8 is connected to the fixing member 1, in other words, the arm 4 via a large number of legs 9 fixed on the fixing member 1.
A material platform is fixed to the fixing member 1 so as to be located between the arm 4 and the ratchet pawl 5 at the upper part of the material platform 8. On the same axis as 3 is a circular recess 10
A screw hole 11 is formed in the material platform 8 at the center of the recess 10, and a screw hole 11 is formed in the recess 10, which can be divided into two in the vertical direction, and the two can be combined. At the time, an annular recess 12 is formed on the outer periphery of the central part in the vertical direction,
Further, a support body 14 having a round hole 13 formed in the center thereof is fitted and detachably fixed with a bolt 15 screwed into the screw hole 11, and the ratchet pawl 5 is locked in the annular recess 12. Or the ratchet gear 1 to be detached
6 is rotatably supported, and a bending die 1 is mounted on the upper surface of the ratchet gear 16 via legs 17.
8 is fixed in a detachable manner, and the bending die 18 is provided with means for supporting the bending material, such as forming a hook portion (not shown) on the outer peripheral surface of the bending die 18, or Measures such as fixing the cylindrical body 19 are taken.

Further, the center of the cylindrical bending die 18 is aligned with the center of the rotating shaft 3.

Further, 20 is a rotatable guide roll for guiding the bending material A provided near the ratchet gear 16 on the material platform 8, and 21 is a guide roll provided near the guide roll 20 for guiding the bending material A. It is a support stand.

Since the present automatic bending machine is constructed as described above, a part of the bending material A is supported by the support stand 21, and its tip is inserted into the cylinder 19 provided in the bending die 18 via the guide roll 20. The bending material A is fixed to the bending mold 18. Next, when the arm 4 is rotated in a predetermined direction via the rotating shaft 3, the ratchet pawl 5 is meshed with the ratchet gear 16, so the ratchet gear 16 rotates as the arm 4 rotates.
At the same time, the bending die 18 fixed to the gear 16 rotates, so that the bending material A is curved along the outer peripheral surface of the bending die 18.

However, when the arm 4 rotates by a certain angle, the arm 4 stops and then rotates in the opposite direction. However, during this reverse rotation, the ratchet pawl 5 does not mesh with the ratchet gear 16, so the ratchet gear 16 stops. In this state, only the arm 4 rotates and returns to its original position, and at the same time as it returns to its original position, the ratchet pawl 5 meshes with the ratchet gear 16 again, returning to the initial state, so that the arm 4 can be set. By rotating forward and backward within a certain range, the material A can be bent continuously, albeit intermittently, without the need to insert the required dimension each time the arm 4 makes one reciprocation, as in the conventional product. This allows the bending process to be carried out without the need for any training or labor-saving work.

As for the processing angle of the bent material by the above-mentioned bending process, not only bending process can be performed within the range of 360 degrees, but also coil-shaped bending process can be performed.

In other words, when bending into a coil shape, when feeding the bending material into the bending die 18, the bending material is fed from above at an angle slightly higher than the height of the cylindrical body 19. It is possible to sequentially bend the bent portion into a coil shape by the height of the bending die 18.

In addition, in order to remove the bending material from the bending die 18 after the bending process is completed, an extrusion jig is driven into the cylindrical body 19 from the opening opposite to the bending material insertion side of the cylindrical body 19. The inserted end of the processed material is pushed out from the cylindrical body 19, and then the material is pulled out above the bending mold 0 and removed.

In addition, as described above, the tip of the bending material A is fixed to the bending die 18, and a part of it is supported by the support stand 21, and is guided by the freely rotatable guide roll 20, so its position may be distorted. The bending process can be performed as designed without any trouble. Furthermore, since the bending die 18 can be freely attached to and detached from the ratchet gear 16, a desired bending process can be performed by fixing the bending die 18 having the required outer peripheral surface to the ratchet gear 16. Furthermore, since the support 14 is fixed within the circular recess 10 of the material platform 8, the support 14, in other words, the position of the ratchet gear 16, will not be misaligned. Further, the support body 14 is formed of a member that can be split into two in the vertical direction, and is easily disassembled, so that in the event of an accident such as damage to the ratchet gear 16, repair can be easily performed. Furthermore, since the center of the bending die 18 and the center of the rotary shaft 3 are on the same line, beautiful bending can be performed.

Since the proposed automatic bending machine is constructed as described above, as is clear from the above explanation, there is no need for rotating rollers, the structure is simple, work efficiency is improved, and moreover, no skill is required and labor is saved. This can produce a remarkable effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the automatic bending machine according to the present invention, FIG. 1 is a plan view thereof, FIG. 2 is a partially omitted sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a plan view illustrating a conventional example. ,
FIG. 4 is a partially omitted cross-sectional view taken along the line CC. DESCRIPTION OF SYMBOLS 1... Fixed member, 3... Rotating shaft, 4... Arm, 5... Ratchet pawl, 8... Material stand, 16... Ratchet gear, 18... Bending mold, A... Bending material.

Claims (1)

[Scope of utility model registration request] An arm is fixed to a rotating shaft that rotates in forward and reverse directions according to a motor, and a ratchet claw is provided on the arm so that it can swing freely, while a fixing member is fixed at the upper part of the arm between the arm and the ratchet claw. A material platform is provided, a circular recess is formed on the upper surface of the material platform and at a position centered on the axis of the rotating shaft, and a ratchet gear is rotatably supported in the circular recess. At the same time, a bending die having a hook part capable of supporting a bending material is detachably fixed to the ratchet gear by positioning the center of the bending die on the same line as the axis. An automatic bending machine characterized in that the ratchet pawl is fixed to the ratchet gear and can be freely engaged and detached from the ratchet gear.