JPH0337783Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal bending device, and more particularly to a multi-purpose bending device.

[Conventional problems] Conventionally, dedicated machines were used for bending plate materials, pipe materials, steel bands, angles, channels, etc. However, although there is no problem when machining large quantities of the same shape, when machining small quantities of different shapes, a large number of specialized machines are required, which poses problems in terms of economy and installation space. Therefore, in order to bend many types of shaped materials with the same machine, for example,
There is something mentioned in Public Relations No. 103014. This is a roller with grooves having a semicircular cross section provided on the outer periphery of the roller in the same vertical direction. However, this bending device cannot be used for a wide range of materials such as plates and steel bands, and since the cross-sectional shape composed of the upper and lower rollers is always circular, there is no problem when using it for pipes, but it can be used for angles or channels. When used for a material having an asymmetrical cross section, there is a risk that the portion parallel to the surface of curvature may be tilted.In particular, when used for a material with an asymmetric cross section, it is thought to have drawbacks such as twisting.

[Purpose of invention]

The present invention was devised in view of the above circumstances, and its purpose is to eliminate the various drawbacks of conventional bending devices and to provide a multi-purpose bending device that does not tilt or twist.

[Summary of the idea]

In order to achieve the above object, the present invention has two lower rollers supported in parallel between the left and right frames, and an upper roller placed above between these rollers as a slider that slides along the frame. It is a bending device that is supported by a shaft and the slider can be moved in the vertical direction by operating a handle, and the upper and lower rollers have removable attachments that have grooves on the outer periphery of the ends that match the cross-sectional shape of the irregularly shaped material. The present invention is characterized in that a height-adjustable roller pedestal is installed at the bottom of the lower roller for temporarily placing the lower roller when the lower roller is attached or detached, and is suitable for bending materials of various shapes. This is what we provide.

[Example of idea]

Hereinafter, an embodiment of the bending device according to the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a front view of the bending device according to the present invention. In FIG. 1, 1 is an upper roller arranged vertically above the midpoint of a line connecting the axes of two lower rollers 2, 2. There is. Both ends of the upper roller 1 are provided with sliders 4 that slide along both side frames 3, 3.
4, each slider 4 is supported by a handle 5.
It is configured so that it can be moved in the vertical direction by a spindle 6 that rotates by rotating the . Further, the two lower rollers 2, 2 are supported by frames 3, 3 on both sides.

The upper roller 1 and the lower rollers 2, 2 have large diameter portions 1a and 2 on the right side of FIG.
a, 2a and small diameter parts 1b and 2b, 2b having the same diameter as the support shaft for inserting various attachments for long objects such as pipes, iron bands, angles, channels, etc.
are provided for each. Grooves having a cross-sectional shape that matches the cross-sectional shape of each elongated object are cut on the outer periphery of each of the same types of attachments when the upper and lower parts are combined. That is, FIG. 3 shows a pipe groove, and between the upper attachment 8 and the lower attachment 9, there are three types of pipe grooves 10, 10, which have approximately circular cross sections and different diameters, and FIG. 4 shows a belt groove. For iron, upper attachment 11 and lower attachment 1
Between the upper attachment 14 and the lower attachment 15, 12, grooves 13, 13, . Two types of angle grooves 16, 16 with hook-shaped cross sections are provided, and the channel groove 19 shown in FIG. It was formed.

Also, the large diameter portions 2a, 2a of the lower rollers 2, 2
A roller holder 20 for replacing attachments as shown in FIG. 7 is provided at the left end of the roller. The roller pedestal 20 has a slider 23 whose upper surface is a superelevation, which moves in the horizontal direction by rotation of a spindle 22 fixed to a handle 21, and a slider 23 whose lower surface is a superelevation.
It is constituted by a roller receiver 24 that has the same slope as the slope of the upper surface and moves vertically as the slider 23 moves horizontally.

A motor 25 for driving the upper roller 1 and the lower rollers 2, 2 is disposed at the upper right side of the bending device, and a pulley 26 and a belt 2 are provided.
7. The speed reducer 29 is rotated via the pulley 28. A gear 31 is attached to the driven shaft 30 of the reducer 29 and meshes with one lower roller gear 32 . Further, one of the lower roller gears 32 meshes with an upper roller gear 33, and the upper roller gear 33 meshes with the other lower roller gear (not shown). That is, the two lower rollers 2, 2 are configured to rotate in the same direction, and the upper roller 1 is configured to rotate in the opposite direction to the lower rollers 2, 2.

Note that the curvature of the bending process can be adjusted by rotating the handles 5, 5 and moving the upper roller 1 up and down.

Next, the operation of the bending device according to the present invention constructed as described above will be explained.

First, we will discuss the case of processing a flat plate. By turning on the power of a switch (not shown),
The motor 25 rotates, and the pulley 26, belt 27,
The reducer 29 is rotated via the pulley 28. Further, the driven gear 31 of the reducer 29 and one of the lower roller gears 32, one of the lower roller gears 32 and the upper roller gear 33, the upper roller gear 33, and the other lower roller gear are meshed with each other. Since it is attached, it rotates sequentially. When a flat plate is inserted between the upper roller 1 and the lower roller 2, since both rollers 1 and 2 are rotating in opposite directions, the flat plate is drawn between both rollers 1 and 2 and is pushed onto the upper side of the other lower roller 2. We will establish this. Since the other lower roller 2 rotates the flat plate upward, that is, toward the discharge side, the flat plate is bent upward and is pulled out between the upper roller 1 and the other lower roller 2.

Incidentally, the curvature of the downward bending process is adjusted by rotating the handles 5, 5 and moving the upper roller 1 up and down.

Next, the case of bending an angle will be explained. The handle 21 of the roller holder 20 is rotated to move the slider 23 to the left in FIG. Since the upper surface of the slider 23 is an inclined surface with the right side being higher, as the slider 23 moves to the left, the roller receiver 24 rises and comes into contact with the lower surfaces of the two lower rollers 2, 2. So left frame 3
Pull it out in the direction to the left in Figure 1. At this time, since the two lower rollers 2, 2 are supported by the roller receiver 24, they will not fall. On the other hand, since the distance between the upper roller 1 and the lower rollers 2, 2 is small, the upper roller 1 is supported only by lowering slightly. and,
The removal handles 34, 34 are screwed into the two screw holes 8a, 8a and 9a, 9a on the top surface of the pipe attachments 8 and 9 shown in FIG. 3 (see FIG. 8). ), hold it with both hands and pull it out to the left as shown in Figure 2. After that, attach the handles 34, 34 to the angle attachment 1.
4, 15 into the screw holes (not shown) for threading the handles, and fit into the small diameter portions 1b and 2b, 2b of each roller 1 and 2, 2, and then into the three bearing holes of the left side frame 3. The shaft portions of the rollers 1, 2, and 2 are inserted, and the left frame 3 is fixed to the foundation. Thereafter, the handle 21 of the roller holder 20 is rotated in the opposite direction to the above direction, and the roller holder 24 is lowered to separate it from the lower surface of the lower rollers 2, 2. Thereafter, a switch (not shown) is turned on to rotate the upper roller 1 and the lower rollers 2, 2. Since each of the above rollers and the attachment are fixed with a key (not shown), the attachment rotates together with each roller.

Next, with one side of the angle facing downward, the angle is inserted into one angle groove 16 formed by the angle attachments 14, 15, 15, pulled in in the same way as the flat plate, and discharged after being bent. At this time, due to the bending of the upper side of the angle, the downward side is twisted, but since the vertical groove of the lower roller prevents the downward side from twisting, the cross section always remains in its original shape.

〔effect〕

As is clear from the description of the above embodiments, in addition to flat plates, the present invention can also be used for pipes, iron bands, angles,
Bending of long objects such as channels can be easily performed with one machine. In addition, since the cross section after processing maintains its original shape, the steel material after processing retains its original moment of inertia and section modulus.
It has various advantages such as being able to be used as a material with original strength as a structural material.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of the bending device according to the present invention, FIG. 2 is a side view, and FIG.
The figure shows an attachment for a pipe, where A is a side view, B is a partial cross-sectional view along the - line, and FIG. 4 is an attachment for a band iron. A is a diagram equivalent to Figure 3 A, Figure 5 is a diagram equivalent to Figure 3 B, Figure 5 shows the angle attachment, Figure A is a diagram equivalent to Figure 3 A, and Figure B is a diagram equivalent to Figure 3. Fig. 6 shows the channel attachment, Fig. 6 shows the channel attachment, Fig. 3 A corresponds to Fig. 3, B corresponds to Fig. 3 B, Fig. 7 shows a sectional view of the roller holder, FIG. 8 is a partially cutaway front view showing the attachment roller with the handle attached. 1... Upper roller, 2... Lower roller, 8, 9
... Attachment for pipe, 10 ... Same groove, 1
1, 12... Attachment for band iron, 13... Same groove, 14, 15... Attachment for angle,
16... Same groove, 17, 18... Channel attachment, 19... Same groove, 20... Roller holder, 23... Slider, 24... Roller holder, 3
1, 32, 33...gear, 34...handle.

Claims (1)

[Claims for Utility Model Registration] (1) Two lower rollers are horizontally supported between the left and right frames, and one upper roller is slid along the frame above the rollers. This is a bending device that is pivotally supported on a slider and can be moved vertically by operating a handle.The upper and lower rollers have grooves on the outer periphery of their ends that match the cross-sectional shape of the irregularly shaped material. A bending device characterized in that an attachment is provided, and a height-adjustable roller pedestal is installed below the lower roller to temporarily place the roller when the lower roller is attached or detached. (2) The bending device according to claim 1, wherein the attachment has one or two screw holes for screwing in the attachment/detachment handle on the outer periphery of the attachment.