JPS62183914A - Push bending machine - Google Patents

Abstract

PURPOSE:To reduce the man-hour in bending and the space for machines by arranging both parts of a pair of bending rollers revolvably for the shaft center of the bending roller of the other part. CONSTITUTION:The 1st bending roller 12 is provided at the upper end part of the 1st rotary shaft 11 and the 2nd bending roller 23 is arranged at the upper end of the 2nd rotary shaft 22 as well. The rollers 12, 23 are respectively driven via the 1st driving shaft 1, 2nd driving shaft 14, and the 1st bending roller 12 and 1st rotary shaft 11 are made rotatable centering around the shaft center 1 of the 2nd bending roller 23. Similarly, the 2nd bending roller 23 is made rotatable freely around the shaft center 11 of the 1st bending roller 12. The reduction in the man-hour for bending work and in the machine space is enabled because a rod material 37 can be bent in order to the right and left by one unit of push bending machine.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a press bending machine used for bending rod-shaped materials such as reinforcing bars used in construction and civil engineering work.

BACKGROUND OF THE INVENTION Various conventional press-bending machines of this type are known, such as the press-bending machine disclosed in Japanese Utility Model Publication No. 57-50096.
In these conventional bending machines, only one of the two rollers for pinching and bending the bar moves around the other roller.

Problems to be Solved by the Invention When using the conventional bending machine described above, when bending a bar in both left and right directions, the bar is first bent in one direction by the desired angle, and then the bar is turned 180° and bent in the same direction. A bending machine was used to press and bend it to the other side, which required a lot of man-hours.

Also, when pressing and bending both ends of a bar, if one pressing and bending machine is used, each end must be replaced and bent separately, and both ends must be pressed and bent separately. In the case of pressing and bending, there was a problem that the bar had to be transferred to both machines, and the installation space for the two machines became large.

Means and operation for solving the shoulder point The present invention has been made in view of the above, and the present invention is based on the above-mentioned considerations.
Right bending, left bending, and both end face bends can be processed sequentially with one press bending machine without reversing or reversing the rotation, and the number of man-hours for bending operations in different bending directions can be significantly reduced. A press bending machine like this? The purpose of this roller is to provide one bending roller with two perfect bending rollers, and one of the bending rollers is rotatable around the axis of the other bending roller. The FC bar material fed between the two is bent leftward and rightward while maintaining its posture.

Example Embodiments of the present invention will be described based on the drawings.

In the figure, 1 is a first lateral movement shaft supported perpendicularly to the frame 2,
This first drive shaft 1 is connected to a *+m moving gear 4 supported by a frame 2 via gears 3α and 3b. 1st. A first guide stand 5 is fixed to the upper end of the drive shaft 1 . This first guide stand 5 has a guide groove 6 formed in the horizontal direction.
, A first sliding body 7 is slidably engaged with this guide groove 6. The first sliding body 7 is supported by a bracket 9 provided on the ~■1 guide stand 5 and is oriented in the direction of movement of the first sliding body 7. A 111 screw 6 is screwed into the first sliding body 7. A drive motor IO is connected to the base of the first screw 8.

The first sliding body 7 has a first drive shaft 11 erected at a position eccentric to and parallel to the first drive flail l, and a first bending roller is attached to the upper end of the first drive shaft 11. 12 is supported via a bearing 13.

A second drive device 15 having a second drive field 14 is fixed to the first sliding body 7 . Further, a second guide stand 16 having a guide groove 17 in the horizontal direction is supported on the 31st turn shaft 1 so as to be freely transmitted.

This second guide stand 16 is connected to the second drive shaft 14 via gears +sa and tab. 2nd guide stand 1
The guide groove 17 of No. 6 is located above the guide groove 6 of the first guide stand 5, and the second sliding body 19 is engaged with this second guide groove 17 so as to be freely movable.

A second screw 20 is supported by a bracket 21 provided on the second guide stand 16 and is provided toward the sliding direction of the second sliding body I9, and this second screw 2o is screwed into the second sliding body 19. are combined. A driving motor 21 is connected to this second screw 20.

A second rotating shaft 22 is erected on the second sliding body 19, and a second bending roller 23 is supported at the upper end of the second rotating shaft 22 via a bearing 24. The second rotation shaft 22
is positioned on the same axis as the first drive shaft 1.

The first and second drive devices 4 and 15 are driven by drive motors 4α and 1
5α and deceleration m4h, 15b.

Both bending rollers 12 and 23 are opposed to each other with a predetermined gap S therebetween, and both bending rollers 12 and 23 are located above a cover 25 fixed to the frame 2.

Above 1. In the bearing portion of the frame 2 that supports the drive shaft 1, a tenth screw pin 26 that faces the side surface of the driven gear 3b fixed to the first drive m+ is fitted into the cylinder 27, and fluid pressure is applied to the cylinder 27. It is designed to appear and appear by acting on it. And the gear 3 facing the lock bin 26
A locking hole 2g into which the lock pin 26 engages is provided on the side surface of b.

The first guide stand 5 also has a second drive shaft supported on the first drive shaft 11.
It faces the lower surface of the guide stand 16. A K20 push pin 29 is fitted into the cylinder 30 and is moved in and out by applying fluid pressure to the cylinder 30. A locking hole 31 in which the lock pin 28 engages is provided on the lower surface of the second guide stand 16 facing this 20th locking pin 29. is 1. When the first and second bending rollers 12 and 23 are in their respective reference positions shown by solid lines in FIG. 2, they are in positions where they engage with each other.

Driven gear 3 fixed to the first drive l1III shaft 1
A first rotation angle detection device 32 for detecting the rotation angle of the @1 drive shaft 1 is provided between the frame body 2 and the frame body 2 . Also, a second rotation for detecting the rotation angle of the second rotation shaft 22 between the slave @ gear +84 of the second rotation shaft 225111 supported on the first rotation shaft 111 and the first guide table 5. An angle detection device 33 is provided.

In FIGS. 5 and 6, reference numeral 34 denotes a photographing and marketing device supported by a support shaft 34g so as to be rotatable from above the first and second bending rollers 12.23 to the sides in the horizontal direction. , 35
1 is a pedestal, and a cylinder device 36 is connected to one end of the pedestal 35. Then, with the pedestal 35 positioned above the first and 20th-212, 23, the pedestal 35 is placed on both sides of the bar 37 supplied between the first and 20-212, 23. @1. ii2fM
The stopper pins 38 and 39 appear and retract toward one side of the tip of the bar 37 protruding from both bending rollers 12 and 23.
The three steady rest bins 40 are respectively cylinder devices 41 and 42.
It is connected to ゜43.

The operation of the surface pressing machine in the above lecture will be explained below.

The bar 37 is fed between the bending rollers 12.23 with the steady rest f34 positioned on the first and second bending rollers 12.23 at the reference position (FIG. 2). At this time, each of the bins 3g to 40f of the steady rest device 33 is moved upward.

Next, as shown in FIGS. 7 to 9, when pushing the bar 37 to the right side from the feeding direction (FIG. 7), the bar 37 is positioned on the left side of the bar 37. The first stopper bin 38 is moved downward.

In the above condition (3), the first bending roller 12 is moved around the roller 23 during the second bending, and the bar 37 is pushed along the circumferential surface of the roller 23 during the second bending.

That is, when the lock bin 26 on the first drive shaft 1 side is removed and the first drive@m+ is rotated, the first guide stand 5 is removed integrally with it.
．． The first sliding body 7, the first rotating shaft 11, and the first bending roller 1
2 rotates around the axis of the first drive shaft 1 (second bending roller 23), and at this time, the first bending roller 12 pushes the bar 37 along the second bending roller 23. .

At this time, a swinging force is applied to the straight portion of the bar 37 to move it to the left due to the pressing force, but this movement is blocked by the first steady rest 38.

Next, when pushing the bar 37 to the left from the feeding direction (
In FIG. 8), the second swing stopper 39 located on the right side of the bar 37 is moved down.

In the above state, the second bending roller 23 presses the bar 37 along the circumferential surface of the first bending roller 12.

That is, when the second drive shaft is rotated by +4t after removing the lock pin/28 on the second rotation shaft 22 side, the second guide table 16, second sliding body 19, second rotation shaft 22, and second drive shaft are rotated by +4t. The second bending roller 23 rotates about the first rotation axis 11ft, and at this time, the second bending roller 23 pushes the bar 37 along the first bending roller 12. At this time,
A 5M9 force acts on the bar 37 to move it to the right, but this movement is blocked by the second steady rest pin 39.

Next, as shown in FIG. 9, if the second bending roller 23 is rotated in the opposite direction to that shown in FIG. The stopper 40 is moved downward to prevent the bar 37 from lifting.

In the above operation, the distance between the bending rollers 12 and 23 must be adjusted according to the diameter of the bar 37 to be bent, but this adjustment requires moving the sliding proboscis 7.19 between the guide stands 5 and 19.
This is done by moving along 6. The movement of each of the above-mentioned sliding bodies 7 and 19 is 7'l. Drive motor 10.2
This is done by turning screw 8.20 at 1.

Note that each screw 8, 20 may be rotated manually via a handle instead of using a motor. Also above: J! I In the 2nd @! 11122 is adjusted so that it is always positioned co-centered with the first drive Q'qIl +.

In addition, when changing the early bending diameter of the bar 37, the bending roller 1
2. Replace 23 with one of a different diameter. At this time, as shown in FIG.
．． Move it to a position that is off from the top of 23.

In the above-mentioned embodiment, by combining with an automatic material feeder, bending processes of various shapes can be easily performed without manual labor. Also two bending rollers 12.23
By making the diameters the same, the radius of curvature can be made the same for left bends, right bends, etc.

Effects of the Invention It is possible to sequentially bend the bar 37, which is the material to be bent, by one press-bending machine, without reversing or reversing it once. , the number of man-hours can be significantly reduced for curves with different bending directions. Further, since the bending process in each of the above directions can be performed with one press-bending machine, its versatility can be greatly improved by kW, and the installation space of the machine can be reduced.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a longitudinal sectional front view, Fig. 2 is a plan view of the bending roller section, and Fig. 3 is a sectional view taken along the line III-It in Fig. 1. Figure 4 is I of Figure 1.
A cross-sectional view taken along the line V-IV, FIG. 5 is a plan view showing the steady rest device, FIG. 6 is a side view thereof, and FIGS.
The figure is an explanatory diagram of the operation. 12.23 is a bending roller, 37 is a bar material.

Claims (2)

[Claims] (1) A bending machine that feeds a bar 37 between a pair of bending rollers 12 and 23 and presses and bends the bar 37 by moving around one of the bending rollers 12 and 23, Both of the pair of bending rollers 12 and 23,
A press-bending machine characterized in that the bending rollers 12 and 23 are provided so as to be rotatable about the axes of the other bending rollers 12 and 23. (2) The press-bending machine according to claim 1, characterized in that the rotation centers of both of the pair of bending rollers 12 and 23 are movable relative to the rotation center of the other.