JPS60108119A - Bending machine - Google Patents

Abstract

PURPOSE:To obtain a bend having no slide between a movable roll and a base material by providing two rolls and the movable roll which is freely movable in the direction vertical to a line for connecting said rolls, and driving them through a transmission wheel. CONSTITUTION:A revolving shaft 2 of a roll A can move in the direction vertical to a line for connecting rolls B, C, through a long hole 3 on a table 10. A rotation of a motor 4 is transferred to a revolving shaft 8 of fixed roll B through gears G1, G2, and the roll C also rotates at the same speed as the roll B through sprockets S1, S2 and a chain 14. Subsequently, a screw lever 23 is rotated by turning a handle 28 and the movable roll A is moved to a prescribed position, and when the motor 4 is driven, the movable roll A rotates at the same speed together with the rolls B, C, and a base material P is bent. According to this mechanism, the movable roll A does not slide idle against the inside circumferential surface of the base material P, and bending can be executed with a high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bending machine, in which three rolls are simultaneously driven by a motor, thereby bending an iodine with high precision.

As shown in Fig. 7, in a conventional bending machine, only two rolls B and 0 out of three rolls A, B, and O are driven by a mower, and roll A is driven by a roll. Direction Y-Y perpendicular to g x - x connecting B and 0
Since it must be moved linearly, it is not driven by a motor and is simply attached to the rotating shaft so that it can rotate freely. For this reason, the material P is rolled into rolls A, B, 0
When bending the material P while feeding the material P between the two, the movable roll A did not rotate at the same speed as the roll B1C and tended to idle while in contact with the inner circumferential surface P' of the material P. For this reason, the material P could not be accurately bent to a predetermined curvature. In addition, when the circular hollow pipe 4 or the square hollow pipe Pb as shown in 18-L is bent, the movable roll A slides idle while contacting the inner circumferential surfaces of these pipes Pa and Pb. As a result, the inner circumferential surface of these pipes was wrinkled, and the bending accuracy was also extremely poor. Furthermore, since the movable roll A is not driven by a motor, it is necessary to apply an external force F to the material P to forcibly push the material P between the rolls A, B, and C at a constant speed. The work was extremely tedious.

In order to eliminate such drawbacks of the conventional bending machine, the movable roll A must be driven by a motor in the same way as the rolls E and 0. However, movable roll A moves in the direction Y-Y perpendicular to &SX which connects rolls B and O so that the curvature of bare side P can be changed. When is driven by the same motor that drives the roll B1C using a transmission means such as an endless chino or an endless belt, the above-mentioned No. 1
Since the length of one chain and the endless belt are constant, it is impossible to move the movable roll A linearly in the Y-Y direction.
It was IJ Noh.

Therefore, the present invention provides that even if the movable roll A is moved linearly in the Y-Y direction, the movable roll A can always be driven at a predetermined speed by the same motor that drives the rolls B and O. The purpose of the present invention is to provide a bending machine in which the movable four wheels A are arranged between the motor and the movable roll A.
A transmission means is interposed that can always drive the movable roll A at a predetermined speed even when moving linearly in the Y direction. Hereinafter, the present invention will be described in detail with reference to the drawings.

Fig. 1 is a perspective view of the bending machine according to the present invention, Fig. 2 is a perspective view of the inside, and Fig. 3 is a plan view of the roll portion, where l is a main body box and three rolls are placed on the top surface of the bending machine. A, B, and 9 are arranged. Rolls B and O do not move on the tape v10, but roll A can move on the table 10. That is, the rotation axis 2 of the roll person passes through a long hole 3 formed in the table 10, and roll A divides the space between rolls E and O into three equal parts, and is perpendicular to mx-x that connects both rolls B and O. It is designed to be able to move linearly in the y-y direction. 4 is roll A, B,
A motor that drives O at the same time, with 5 small pulleys and 1 small pulley.
It is decelerated by the m-belt 6 and the large pulley 7.

8.9 is low ρB, 0 rotation axis, 11 is roll A, B,
(The key to prevent it from spinning idle is the material. Rolls A, %B, and O are replaceably attached to the rotating shaft 2.8.9, and can be replaced with rolls of other shapes. I can do it.

G1 is a worm gear installed coaxially with the pulley 7, and meshes with a gear G2 installed below the rotating shaft 8, and the rotation of the motor 4 is caused through these gears GI and G2. and is transmitted to roll B. 12 is a bearing for the worm gear G. Sprockets S3 and S2 are arranged at the bottom of the rotating shaft 8.9. 13
is a rotating shaft installed at the rear inside the main body box l, and a sprocket S3 is installed at the bottom of the rotating shaft. An endless chino 14 is tuned to each sprocket 5IXSO1s3. The rotation of the motor 4 is therefore transmitted via the sprockets 81, 82 and the force 1 to the roll C, which rotates at the same speed as the roll B.

G3 is attached to the bottom of rotating shaft 2 of movable roll A.

The gear Gs is in mesh with the gear G4. Both gears G3XG4 are rotatably supported on the same gear 15. A sprocket Sa is attached to the lower part of the rotating shaft 16 of the gear G4, and an endless chino 17 is tuned to the sprocket S4 and the sprocket S6 arranged on the rotating shaft 13. Therefore, the rotation of the motor 4 is transmitted to the gear G4 via the endless chain 14, the sprockets SA, Sa, the endless chain 17, and the sprockets S4. Further, the rotation of gear G4 is transmitted to gear G3, and movable roll A, which is attached to the same shaft 2 as gear G3, rotates in tandem with rolls B and 0. One end of a long plate 18 is rotatably connected to the rotating shaft 16, and the other end of the long plate 18 is rotatably connected to the rotating shaft 13.

Next, while referring to FIGS. 4 and 5, move Y7 of movable roll A.
The mechanism for moving in the M direction will be explained.

21 is a slider loosely attached to the rotating shaft 2, 22.22 is a guide part side vertically installed on the lower surface of the tape A/lO, and the slider 21 and the guide member 22.22 are , movable p-le A
It constitutes a guide part in the Y-Y direction. Slider 21
Protrusions 21a, 21a are provided on both sides of the guide part 22, 22, and the protrusions 21a, 21a are provided on the inner surface of the guide part 22.22.
- It is slidably fitted into a groove 22a122a formed along the Y direction. A threaded rod 23 having a male thread is loosely attached to the rear surface of the slider 21. The screw rod 23
is parallel to the Y-Y direction, and the rear end portion 23a protrudes outside the main box l. 24.25 is a bearing. Reference numeral 26 denotes a support member provided on the lower surface of the table 1o, and the threaded rod 23 is screwed into a female threaded hole 26a formed in the support part lug 26.

G6 is a large gear attached to the rear of the screw rod 23, and a gear G7 meshes with the large gear G6. gear G
The rotating shaft 27 of 7 protrudes outside the main box l, and a 4% production handle 28 is attached to the rear end (J is cut out. When the handle 28 is rotated, gear G7 and large gear G6 The threaded rod 23 rotates via. Since the screw rod 23 is screwed into the female screw hole 26a of the support member 26 as described above, the screw head 23 does not rotate but moves linearly in the Y-Y direction. Therefore, there is a play at the tip of the screw rod 23:
The slid slider 21 is also guided by the guide members 22.22 and moves linearly in the YY direction. Furthermore, when the slider 21 moves in the Y-Y direction, the gear G3 and the movable low/l
/A also moves linearly in the Y-Y direction.

Next, the operation of this device will be explained with reference to FIG.

After turning the operating handle 28 to rotate the screw rod 23 and moving the movable roll A to a desired position in the Y-Y direction, the motor 4 is driven. The rotation of the motor 4 is transmitted to the rotating shaft 8.9, and the rolls B and C rotate at the same speed. Also, the rotation of motor 4 is gear GI%G! , sprocket SI%S2, S3
, -Ss, S4 are transmitted to the rotating shaft 16 via the endless chino 14.17, and the gear G4 rotates. The rotation of gear G4 is transmitted to gear G3, and movable roll A, which is attached to the same rotating shaft a as gear G3, also rotates at the same speed as rolls E, , O. If the tip of the material P is inserted between the rolls AXE and O, the material JfAP will be bent by the rolls AXB and O (see Figure 6(a)). Since the movable roll A is driven by the motor 4 in the same way as /E, 0, the movable roll A does not idle slide on the inner peripheral surface of the material P, and the rectangular hollow pipe made by Miniram is bent by this device to form a pipe with a diameter of 300 mm. If a ring is formed,
The error can be easily kept within 1 mm.

Further, even if the hollow element 2 such as a pipe is bent, since the movable roll A is driven by the motor 4, wrinkles will not occur on the inner periphery mj of the material with which the movable roll A slides. Low) l/AXB, 0 is motor 4
Since the material P is being rotated by the roll A, 13.
It is automatically fed G at a constant speed in the direction of arrow C by the rotational force of 0. Therefore, by applying an external force to the material P, roll A,
B... There is no need to send it to the 0 side.

Next, when reducing the curvature of the material P, use the operating handle 2.
8 and move gear G3 in the direction of arrow a in Fig. 6(b).
When the gear G3 is moved in the direction, the movable roll A attached to the same rotating shaft 2 as the gear G3 is also moved in the direction of the arrow a. Then, the long plate 18 slightly rotates in the direction of arrow 1 about the rotating shaft 13, and the gear G4 pivotally supported on the long plate 18 rotates around the gear G3 while remaining in one mesh with the gear G3. That is, gear G4 is a planetary gear of gear G3. Even if the gear G4 rotates around the gear G3 in this way, the distance '4L between the rotating shaft 13 and the rotating shaft 16 is constant, so the endless chino 17 will not become loose or tense. Therefore, the rotation of the motor 4 is reliably transmitted from the gear Gs to the gear G4 as in the above case, and the movable roll A
rotates at the same time as low/l/E and O. Then, when the material P is sent between rolls A, E, .

Similarly, when the material P is bent with a large curvature, it is also called a tear.
In this case, the operating hand/I/28 is rotated in the opposite direction to that in the above case. Then, the gear G3 moves in the direction indicated by the arrow, and the movable roll A also moves in the direction indicated by the arrow. Then, the long plate 18 slightly rotates about the rotating shaft 13 in the direction of arrow b'. Also in this case, the distance t' between the rotating shaft 13 and the rotating shaft 16;
IG L remains unchanged, the rotation of motor 4 is reliably transmitted from gear G3 to gear G4, and movable roll A is transferred to roll B,
Rotates at the same speed as C.

As shown in 2 below, according to this device, the 10-movement roll A is moved Y-Y.
Even if the movable roll A is moved linearly in the direction, the movable roll A can be rotated at a predetermined speed by the motor 4. The material P can be bent with high precision without causing the material P to slide freely.

In addition to the above-mentioned embodiments, various design changes can be made in the present invention, and the point is that even if the movable roll A moves linearly in the Y-Y direction, the i'+J moving low/l/ It is only necessary to be able to reliably transmit the rotation of the motor 4 to A and rotate the movable row/l/A at a predetermined speed. Therefore, for example, a sprocket, a pulley, or an endless belt may be used in place of the gear or endless chain 2 of the above embodiment, and the rotation of the motor 4 may be transmitted to RO/L/AXE, O via these. Moreover, it goes without saying that this device can bend materials of arbitrary shapes, such as circular rods, square rods, angled rods, long plates, etc. by replacing rolls A and EXO with rolls of other shapes. Further, the movement of the movable roll A in the Y-Y direction, etc. may be automatically controlled by well-known control means such as a computer, and in this case, the operating handle 28 may be omitted. In addition, the movable row /l/ that comes into contact with the inner circumferential surface of the material P
The rotational speed of A is changed to roll B which contacts the outer peripheral surface of material P.
, O by the difference in the bending diameter between the inner circumferential surface and the outer circumferential surface of the material P, the bending accuracy can be further improved. Even if it is rotated at exactly the same speed as B and O, sufficient bending accuracy can be obtained.

As explained above, the bending machine according to the present invention has two rolls B and O arranged on the table 10 and driven by the motor 4, and two rolls B and O that are moved between the two rolls B and O. There is a movable roll A provided movably in the direction YY perpendicular to the connecting line xx, and a transmission jlLGa is connected to the lower part of the rotating shaft 2 of the movable roll A. A transmission wheel G4 that rotates around G3 is provided, and the rotation of the motor 4 is transmitted to the transmission wheel G3 via the transmission wheel G4, so that the material can be bent with high precision. Even if the hollow material is bent, no wrinkles will occur on its inner peripheral surface. Further, since the foil material is automatically sent to the roll side by the rotational force of the roll, there are effects such as extremely excellent workability.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall perspective view of a bending machine, Fig. 2 is an internal perspective view,
Figure 3 shows the top view of B, 0, Figure 4 and Figure 5 on the roll.
The figure is a partial sectional view, FIGS. 6(a), (b), and (C) are partial plan views, FIG. 7 is a partial plan view of a conventional bending machine, and FIG. 8 is a perspective view of the material. A...Movable roll E, 0...Roll G3, G4・
...Gear (transmission vehicle) l...Main box 2...Rotating shaft 4...Motor 10...Table applicant Yasunaga Suezaki (one other person) Representative patent attorney Toshiyuki Takamatsu Figure 6 ( a) (C) Figure 7 Figure 8

Claims (1)

[Claims] There are two rolls arranged on a table and driven by a motor, and a movable roll provided between the two rolls so as to be movable in a direction perpendicular to a line connecting the two rolls. A bending machine in which a transmission wheel is connected to the lower part of the rotating shaft of the transmission wheel, and the transmission wheel rotating around the circumference of the transmission wheel is struck, thereby transmitting the rotation of the motor to the transmission wheel via the transmission wheel. .