JPH05329555A - Contact bending machine - Google Patents

Abstract

PURPOSE:To provide a contact bending machine by which it is prevented that a sheet metal coming out of between a pair of rollers of a final stage is deflected greatly, and also, the sheet metal is not damaged even if the sheet metal hits against the ground. CONSTITUTION:A motor 3 and the pairs of rollers 9a and 9b-14a and 14b of the contact bending machine are juxtaposed in a horizontal direction on a frame body 2. As for the tapered faces of the pairs of rollers 9a and 9b-14a and 14b, its angle is set so that the bending direction is downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact bending machine for contact bending an edge of a thin sheet metal.

[0002]

2. Description of the Related Art Conventionally, in order to improve the strength of a thin sheet metal or to prevent the end surface of the thin sheet metal from being injured, the following machine is used as a processing machine for closely bending the edge of the thin sheet metal by roll forming. It has been known. That is,
A motor fixed to the lower part of the frame, a drive shaft driven by this motor through a gear reducer, and a drive shaft connected to this drive shaft via a transmission mechanism such as a gear or a chain, and the axis line is parallel to the vertical direction. A plurality of driven shafts arranged side by side with two arranged as a pair, and a plurality of rollers attached to each end of the plurality of driven shafts and having tapered surfaces with different angles on their peripheral surfaces, By sandwiching the sheet metal between the pair of upper and lower rollers and sequentially sending out between the plurality of pairs of rollers, the edge of the sheet metal is closely bent.

Here, in the bending step between the rollers, first, a sheet metal sheet inserted in the horizontal direction is sandwiched between the first roller pair. Then, a predetermined size of the edge of the thin sheet metal is bent upward by about 30 degrees between the pair of first rollers. Fold upwards about 70 degrees between the second pair of rollers, then fold at a right angle between the third pair of rollers, and then fold back about 120 degrees between the fourth pair of rollers, and Then, it is folded back at 160 degrees between the fifth roller pair, and finally, a substantially flat contact bending portion is formed while ensuring a predetermined folding wall thickness between the sixth roller pair.
According to such a close contact bending machine, since it is possible to perform a stepwise bending process with a plurality of roller pairs, it is possible to form a close bent portion with very few wrinkles and cracks without applying excessive stress to the thin sheet metal. Is.

[0004]

However, in the contact bending machine having the above structure, since the motor is attached to the lower part of the frame, the height of the machine becomes high and the position of the roller becomes high. Therefore, even if the processing machine is directly set on the ground and driven, there is a problem that the thin sheet metal that has exited between the sixth roller pair, which is the final stage, is largely bent toward the ground and bent.

Further, the above-mentioned contact bending machine is constructed so as to be sequentially folded back upward by a plurality of roller pairs, and since the contact bending portion is usually formed on the back surface of the thin sheet metal, The sheet metal sheet that has exited the 6th roller pair in the final stage has its intimate bent portion on the upper surface and the surface side of the sheet metal sheet on the lower surface, and the surface of the delivered sheet metal hits the ground, causing damage. It had a drawback that it was easy to damage the troublesome essential surface.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and prevents the thin sheet metal that has exited between the roller pairs at the final stage from being largely bent, and even when the thin sheet metal hits the ground. An object of the present invention is to provide a contact bending machine excellent in practicability without damaging the surface of the sheet metal.

[0007]

A contact bending machine according to the present invention includes a motor fixed to a frame, a drive shaft driven by the motor, and a transmission mechanism such as a gear or a chain on the drive shaft. A plurality of driven shafts, each of which is connected in parallel, and has a plurality of pairs of which are arranged in parallel with each other with the axis line parallel to each other.
It is equipped with a plurality of rollers that are attached to each end of the plurality of driven shafts and that have tapered surfaces with different angles on their peripheral surfaces, and a sheet metal is sandwiched between the pair of upper and lower rollers in order between the plurality of pairs of rollers. By sending out, the edge of the sheet metal is closely bent, and the motor and the roller are horizontally arranged side by side on the frame, and the taper surface of the roller is bent downward. The angle is set.

[0008]

According to the contact bending machine of the present invention, since the plurality of roller pairs and the motor are arranged side by side on the frame,
The height dimension of the contact bending machine can be significantly reduced, the height positions of the roller pairs are lowered, and the thin sheet metal sent out will hit the ground before it is largely bent. It is possible to prevent bent thin sheet metal from bending. On the other hand, since the edges of the sheet metal sheet are sequentially folded back downward by a plurality of roller pairs, the sheet metal sheet that exits the roller pair at the final stage has its intimate bent portion serving as the lower surface,
The front side of the thin sheet metal never hits the ground. As a result, it is possible to provide a contact bending machine excellent in practicability, which prevents a deformation accident due to bending of the thin sheet metal plate that has gone out between the pair of rollers at the final stage, and is not practically damaged.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 is a contact bending machine of the present invention for performing contact bending of the edges of the thin sheet metal by roll forming in order to improve the strength of the thin sheet metal. This contact bending machine 1
Is a frame body 2, a motor 3 fixed to one side of the frame body 2, a drive shaft 5 driven by the motor 3 via a gear reducer 4, and a gear 6a on the drive shaft 5. 6b and the chain 7 are connected via a transmission mechanism, and 6 pairs of the driven shafts 8a and 8b are arranged side by side, and two pairs of the shafts are arranged in parallel with each other and the axes of the driven shafts 8a and 8b. 6 roller pairs 9a and 9b, 10a and 10b, each of which has a taper surface with different angles attached to each end of the roller pair,
11a and 11b, 12a and 12b, 13a and 13
b, 14a, and 14b.

The frame 2 has a base 2a formed in a rectangular shape having casters 15 on the lower surface, and six bearing holes 16 and 17 which are vertically provided on the front and rear of the base 2a. The lower front plate 2b, the lower rear plate 2c, and both lower plates 2
6 bearing holes 1 provided on b and 2c in a horizontal direction
A front upper plate 2d having 8 and 19 and a rear upper plate 2e;
Angle plates 20 and 21 that are welded or bolted to the base 2a to guide the edge of the thin sheet metal on the side of the closely bent portion, and extendable and retractable via the two columns 22 on the base 2a. And an angle plate 23 that is disposed so as to face the angle plates 20 and 21 and guides the other edge of the thin sheet metal. Further, 24 is the front upper plate 2d,
And a cover detachably attached to the rear upper plate 2e.

The gear reducer 4 includes a pulley 25 attached to the drive shaft of the motor 3, a pulley 26 rotatably supported by the lower plate 2c of the rear surface, gears 27, 28, and 2.
9 and 30, a belt 31 connecting the pulleys 25 and 26, a chain 32 connecting the gears 27 and 28, and a chain 33 connecting the gears 29 and 30, and finally the drive shaft 5 The rotation of the motor 3 is decelerated and transmitted to the drive shaft 5 by the number of teeth of the gear 30. The rotation of the drive shaft 5 is transmitted to the upper and lower driven shafts 8a and 8b through the lower gear 6b, the upper gear 6a, and the chain 7, and the roller pairs 9a and 9b to 14a and 14a.
Up to b are driven to rotate at the same speed and in the same direction. Incidentally, 34
Is an operation switch of the contact bending machine 1.

Further, as shown in FIG. 7, spring washers 35 are provided at two positions between the lower front plate 2b and the upper front plate 2d.
Is interposed between the two plates 2b and 2d, and a slight gap 3
6 is formed. On the other hand, the spring washer 3
A through hole 38 having a step 37 is formed in the upper front plate 2d at the position 5 and a screw hole 39 is formed in the lower front plate 2b corresponding to the through hole 38. A bolt 41 is inserted into the through hole 38 via a compression spring 40 set on the step 37 and screwed into a screw hole 39 of the front lower plate 2b. As a result, usually, the thickness of the spring washer 35 can secure the escape of a predetermined thickness of the thin sheet metal, and when the thickness of the thin sheet metal to be processed becomes thick, the compression spring 40 is When compressed, the spring washer 35 is restored, the front upper plate 2d is lifted upward, and the gap 36 is widened, so that the roller pair 9a, 9
The gap between b can be automatically widened. Therefore, it becomes possible to easily deal with thin sheet metals having different sheet thicknesses without making any adjustments.

In the contact bending machine 1 thus constructed, when the operation switch 34 is turned on, the motor 3 is driven, the drive shaft 5 is driven via the gear reducer 4, and the gears 6a, 6b and the chain 7 are driven. The roller groups 9a and 9b to 14a and 14b rotate via the driven shafts 8a and 8b. Then, a thin sheet metal (not shown) to be processed is set horizontally on the angle plates 20 and 23 so that the surface thereof faces upward.

The first roller pair 9a, 9b
By sequentially feeding from the space between the sixth roller pair 14a and 14b, the edge of the sheet metal is closely bent. Here, as shown in FIG. 8, the folding process between the pair of rollers is as follows.
A thin sheet metal plate inserted in the horizontal direction is sandwiched between 9b.
Then, the taper surface 9c between the first pair of rollers 9a and 9b bends a predetermined size of the edge of the sheet metal sheet downward by about 30 degrees. Next, as shown in FIG. 9, the second roller pair 10a,
The taper surface 10c between the portions 10b is bent downward by about 70 degrees, and then the third roller pair 11a, 11b as shown in FIG.
Bend at a right angle on the vertical surface 11c between the
As shown in FIG. 12, the taper surface 12c between the fourth roller pair 12a and 12b folds back to about 120 degrees, and the taper surface 13c between the fifth roller pair 13a and 13b folds to 160 degrees. Then, as shown in FIG. 13, a substantially flat contact bending portion is formed while securing a predetermined folded back wall thickness in the recess 14c between the sixth roller pair 14a, 14b. The depth of the recess 14c of the roller pair 14a, 14b is formed in two steps in the axial direction.
By reversing the direction of b, it is possible to change the folded back wall thickness of the contact bending portion into two types. According to the contact bending machine 1 as described above, since it is possible to perform the stepwise bending process with the plurality of roller pairs 9a and 9b to 14a and 14b, an unreasonable stress is not applied to the thin sheet metal, and wrinkles and cracks are extremely reduced. It is possible to form a few tight bends.

The contact bending machine 1 configured as described above
Is the plurality of roller pairs 9a and 9b-14a and 1
4b and the motor 3 are juxtaposed on the frame 2,
The height dimension of the contact bending machine 1 can be significantly reduced, and the height positions of the plurality of roller pairs 9a and 9b to 14a and 14b can also be lowered, whereby the final stage roller pair 14a.
Since the thin sheet metal that has exited 14 and 14b hits the ground without being largely bent downward after being sent out, it is possible to prevent the thin sheet metal from being largely bent downward and bent. In addition, the edge of the thin sheet metal can be sequentially folded back downward by the plurality of roller pairs 9a and 9b to 14a and 14b. The part becomes the lower surface which is the back surface, and the front surface side of the thin sheet metal never touches the ground. As a result, it is possible to prevent the sheet metal sheet that has exited between the roller pairs 14a and 14b in the final stage from being largely bent and to bend and deform the contact bending portion or the entire sheet metal, and even if the sheet metal sheet hits the ground, the surface of the sheet metal is prevented. It is a contact bending machine with excellent practicability that will not be damaged.

In the embodiment, in order to decelerate the rotation speed of the motor 3, the pulleys 25, 26, the gears 27, 28, 2,
Although the gear reducer 4 including the gears 9 and 30, the belt 31 and the chains 32 and 33 is used, the invention is not limited to this, and the motor 3 having a built-in reduction mechanism is used.
It does not matter if the drive shaft 5 is directly driven by the drive shaft.

[0017]

As described in detail above, according to the present invention, since a plurality of roller pairs and a motor are arranged side by side on the frame, the height dimension of the contact bending machine can be greatly reduced, and a plurality of rollers can be reduced. By lowering the height position of the roller pair, it is possible to prevent the thin sheet metal from the roller pair at the final stage from being largely bent downward. In addition, since the edge of the thin sheet metal can be sequentially folded back downward by a plurality of roller pairs, the sheet metal sheet that exits the roller pair at the final stage has its contact bending portion on the lower surface, and the surface side of the thin sheet metal sheet is You will never hit the ground. As a result, while preventing the thin sheet metal that has exited between the pair of rollers in the final stage from being greatly bent and deformed, even if the thin sheet metal hits the ground, the surface of the sheet metal will not be damaged and has excellent practical adhesion. A bending machine can be provided.

[Brief description of drawings]

FIG. 1 is a plan view of a contact bending machine of the present invention.

FIG. 2 is a plan view of the contact bending machine with a cover removed.

FIG. 3 is a front view of a contact bending machine.

FIG. 4 is a rear view of the contact bending machine.

FIG. 5 is a side view of the contact bending machine.

FIG. 6 is a bottom view of the contact bending machine.

FIG. 7 is an enlarged vertical sectional view of an essential part of a front upper and lower frame body.

FIG. 8 is a vertical cross-sectional view of a first roller pair.

FIG. 9 is a vertical sectional view of a second roller pair.

FIG. 10 is a vertical sectional view of a third roller pair.

FIG. 11 is a vertical sectional view of a fourth roller pair.

FIG. 12 is a vertical sectional view of a fifth roller pair.

FIG. 13 is a vertical sectional view of a sixth roller pair.

[Explanation of symbols]

 1 close contact bending machine 2 frame 3 motor 4 gear reducer 5 drive shaft 6a gear 6b gear 7 chain 8a driven shaft 8b driven shaft

Claims (1)

[Claims] 1. A motor fixed to a frame, a drive shaft driven by the motor, and a drive shaft connected to the drive shaft via a transmission mechanism such as a gear or a chain, and vertically so that their axes are parallel to each other. A plurality of driven shafts arranged in parallel as a pair of the two driven shafts, and a plurality of rollers attached to respective end portions of the plurality of driven shafts and having tapered surfaces of different angles on their peripheral surfaces, By sandwiching the sheet metal between a pair of upper and lower rollers and sequentially sending out between a plurality of pairs of rollers,
In a contact bending machine for contact bending the edge of the sheet metal, the motor and the roller are arranged side by side in a horizontal direction on the frame, and the taper surface of the roller is angled so that the bending direction is downward. A close-bending machine characterized by that.