JP3526658B2 - Bending method and apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for folding and processing a front end portion of a strip plate material.

[0002]

2. Description of the Related Art Conventionally, there has been known a processing apparatus which is equipped with a mold and bends an edge of a strip-shaped plate.

In order to process the product shown in FIG. 2 in which the tip of the strip is folded and folded, the conventional method shown in FIGS.
The folding process was performed in the four steps shown in.

The first step is the leading end W of the strip shown in FIG.
In the step of forming a reverse V shape, the strip plate material 1 is sandwiched between the punch 21 and the pad 23, and the strip plate material 1 is fixed by pushing up the pad 23 with the spring 24. The tip portion W of the plate material 1 is formed in an inverted V shape by the protrusion of the base 22. The end plate W is bent into a substantially inverted V shape to form the strip plate material 1a having a front end side bent part Wa and a base part side bent part Wb. The base part side bent part Wb and the base part B are formed. The bending angle is about 150 ° shown by θ in FIG.

The strip member 1a having the tip W formed in an inverted V shape is taken out from the processing device in the first step and set in the processing device in the next second step.

In the second step, the strip plate material 1a set on the pad 26 shown in FIG. 10 is punched 25 by the pressure of the spring 27.
The tip portion W is formed into a right angle shape by the table 28 while being lowered while being sandwiched by and, and is formed into the strip plate material 1b in which the base of the tip portion W shown in FIG. 10 is bent at a right angle.

[0007] The strip material 1b whose tip W is bent at a right angle is taken out from the processing apparatus in the second step and set in the processing apparatus in the next third step.

In the third step, the strip plate material 1b is replaced with 1c in FIG.
In order to form into the shape shown by (3), the band plate material 1b set on the table 34 is sandwiched by the pad 32 and pressed by the spring 31, and the punch 33 is moved from the side surface for processing. Then, the base of the front end portion W of the strip plate member 1c is formed into an acute angle.

The strip member 1c having the tip end W formed into an acute angle is taken out from the processing device in the third step and set in the processing device in the fourth and final step.

In the fourth step, the strip 1c placed on the base 39 shown in FIG. 12 is pressed by the pressure of the spring 37 via the pad 38. Then, the tip end W is bent from above by the punch 36 descending to be processed into a product indicated by 1d in FIG.

[0011]

In the above-mentioned conventional structure, since the product of the folded and folded product shown in FIG. 2 is processed by spending four steps, the number of surfaces of the mold is increased and the equipment cost is required. There was a problem.

Further, it is necessary to position and process the strip material in each process, which requires labor and processing time. Further, there is a problem in that, for automation, four press machines and molds are required, and equipment space for four machines is required.

Therefore, it has been desired to reduce the folding process to the shortest possible process.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems, to provide a folding method and apparatus which can shorten the process of lap bending and realize labor-saving automation relatively inexpensively.

[0015]

In order to solve the above-mentioned problems of the prior art, the present invention is such that the tip portion is bent in a substantially inverted V shape and has a tip side bent portion and a base side bent portion. A folding method for stacking and folding the above-mentioned tip end portion of the strip plate material formed on the base plate.The base portion of the strip plate material is placed on the lower base portion, and the upper base portion is placed downward.
Drop it and hold the base of the strip between the lower stand and then
Rotate the bending member to press the base side bent portion of the strip plate.
Bend to the base side of the strip, and then press the bending member to the next press.
Turn back to a position that does not interfere with the process, then press
It is characterized in that the material is lowered and the tip end side bent portion of the strip plate material is pressed against the base portion side bent portion, and the tip end portion is folded over the base portion.

Further, the angle between the base side bent portion and the base portion is
And Turkey have reached 145 degrees to 155 degrees range are preferred.

[0017]

The present invention having the above-described structure can perform the following operations. That is, when the upper table is lowered,
First, the base portion of the strip material is sandwiched between the lower base portion, and then the bending member is rotated to bend the base side bent portion of the strip material to the base side of the strip material and then return to the original position, Then press parts
By but configured to overlap folding the tip while pressing the tip side bent portions of the strip plate material drop-off down to the base side bent portion on the base, the distal end portion while the upper base portion is lowered Is almost reverse V
After bending the base-side bent portion of the strip-shaped plate material bent by the bending member, the tip-side bent portion is pressed by the pressing member, so that the tip portion is folded over the base portion. Therefore, according to the present invention, the over-folding process of the steps shown in FIGS. 11, 12, and 13 in the conventional example can be completed in only one step. In addition, it is possible to continuously perform the folding and folding process of the strip plate material by the vertical movement of the upper base portion, and it is possible to greatly reduce the labor cost and the processing time.

Further, the angle between the base side bent portion and the base portion is
If the tip end portion of the strip plate material in the range of 145 ° to 155 ° is subjected to the overlapping folding process, the bending portion of the strip plate material on the base side can be easily bent. This is because, in the case of a strip material whose tip portion is bent at an angle of 155 degrees or more, bending force acts on the sandwiching portion of the strip material, making it difficult to bend it at the base side bending portion, while
Since the burden of the pretreatment process becomes large in order to obtain the strip material bent to 5 degrees or less, it is desirable that the angle between the base side bent portion and the base portion be 145 degrees to 155 degrees, and approximately 1 degree.
If it is 50 degrees, it is possible to realize an inexpensive labor-saving automation device that completes the folding process only in one process of one equipment.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 8 show an embodiment of the present invention. In FIG. 1, the tip portion W is bent into a substantially inverted V shape and has a tip side bent portion Wa and a base portion side bent portion Wb, and between the base portion side bent portion Wb and the base portion B. 1 shows a processing device for stack-folding a strip 1a bent at an angle of about 150 ° shown by θ in the figure.

This processing apparatus is provided on a lower base portion 9 for setting the base portion B of the strip plate material 1a bent in the substantially inverted V shape and on the lower base portion 9 located below the front end portion W of the strip plate material 1a. The rotary shaft 8 is provided.

The rotating shaft 8 has a bending member 2 which bends the tip end portion W of the strip plate material 1a into an acute angle in response to the rotation of the rotating shaft 8.
And a rotating piece 3 that is provided with a piece portion 3a to move the rotating shaft 8
And the rotating shaft 8 through the spring 5 located below the rotating shaft 8.
Is pivotally supported by a rotary arm 4 that pulls the. Further, the upper plate portion 16 configured to be movable up and down includes the strip plate material 1a.
A pressing member 12 for pressing the tip end W of the belt, a cam member 11 having a cam-shaped protruding portion 11a, and a spring member 15 for pressing and clamping the base portion B of the strip plate member 1a with spring pressure. A pad 13 is provided.

A rotary shaft 8 is provided on the lower base portion 9 shown in FIG. The rotating shaft 8 has a bending member 2 shown in FIG. 3, a rotating piece 3 shown in FIG. 4, and a rotating arm 4 shown in FIG.
It is fixed at. The piece 3a of the rotating piece 3 is formed by the cam member 1
The bending member 2 and the rotary arm 4 pivotally supported by the rotary shaft 8 are rotated by a predetermined angle by being pressed by being vertically moved by the protrusion 11a provided on the rotary shaft 1. When the rotary shaft 8 is rotated, the tip end portion 2a of the bending member 2 which extends in a small shape comes into contact with the base side bent portion Wb of the strip plate material 1a and bends it at an acute angle. And the rotating arm 4 has a rotating shaft 8
At a lower position of the bending member 2 and the rotating piece 3 by being pulled by the bracket 6 provided on the base 10 via the tension spring 5.
It is responsible for the rotation and return of and to the fixed position.

A method of performing the overlapping folding process of the strip plate 1a by moving the rotary piece 3 of the rotary shaft 8 by the projecting portion 11a of the cam member 11 using the processing apparatus configured as described above will be described below.

In the processing apparatus shown in FIG. 9, the strip plate material 1a having the front end portion W preliminarily bent in an inverted V shape is set on the lower base portion 9 of FIG. 1 on which the base portion B is placed.

Therefore, the upper base 16 is configured to be movable up and down, and drives the spring member 15, the cam member 11 having the protrusion 11a, and the pressing member 12 for pressing downward.

Next, when the upper base 16 is lowered, the strip 1
The base B of a is formed by compressing the spring material 15 and the pad 13 and the lower base 9
Sandwiched between.

When the protruding portion 11a of the cam member 11 hits the piece portion 3a of the rotary piece 3 pivotally supported by the rotary shaft 8, the rotary piece 3 rotates the bending member 2 in the right rotation direction in the figure. When the cam member 11 is further lowered, the bending member 2 is rotated and the strip plate member 1a fixed by the pad 13 is a small end portion 2a of the bending member 2 extending at the base side and the base side bent portion indicated by Wb in FIG. B is bent upward at an acute angle of 90 degrees or more.

The rotating arm 4 also rotates together with the rotating piece 3, and the spring 5 connected to the rotating arm 4 and the bracket 6 is stretched.

Therefore, as shown in FIG. 7, when the projection 11a of the cam member 11 descends beyond the bridge 3a, the spring pressure of the extended spring 5 acts in the direction of returning the rotary arm 4 to the lower position. The bending member 2 and the rotating piece 3 are returned to their original positions.

When the upper base portion 16 is further lowered, the press member 12 is lowered onto the front end side bent portion Wa of the strip plate material 1a, and the front end portion W of the strip plate material 1a shown in FIG. It can be pushed and bent.

By this operation, the band plate material 1a is formed into a product 1d in which the edges of the band plate shown in FIG.

On the other hand, when the upper base portion 16 passes the lowering point, it starts to move up to the protruding portion 1 of the cam member 11 shown in FIG.
1a reversely rotates the piece 3a of the rotating piece 3 from the lower side to the upper side. Also in this case, when the rotation arm 4 rotates and a spring pressure is generated by the spring 5, and the protrusion 11a of the cam member 11 moves upward beyond the rotation piece 3, the spring 5 returns the rotation arm 4 to the lower position. Acting in the direction, the bending member 2 and the rotating piece 3 are returned to their original positions.

When the upper table 16 is completely lifted up, the product 1d having the front end W overlapped and folded is discharged, and the next pre-bent strip 1a is set on the lower table 9 again.
The operations of the above steps are repeated to perform the folding process.

According to the above-described embodiment, the cam member 11 moves up and down by the operation of the upper base portion 16 to rotate the bending member 2, bend the base side bent portion Wb of the strip plate 1a, and further press the press member. Since the pressing can be performed from above the tip side bent portion Wa at 12, the over-folding process can be realized by the two processes of the pre-bending process shown in FIG. 9 and the above process, and the process can be shortened. it can. In addition, conventional processes 2 to 4 are carried out with one equipment machine, preventing variations in processing between processes, further reducing labor costs and processing time significantly, equipment cost and mold The cost can be drastically reduced and labor-saving automation can be performed at low cost. In addition, in the present embodiment, the strip plate member 1a having the angle θ between the base side bent portion Wb and the base portion B of 150 degrees is used, but the present invention is not limited to this. Furthermore, the three members 2 shown in FIGS.
3 and 4, the tip portion 2a of the bending member, the contact surface 3a, and the arm portion 4 may be integrally formed. That is, the present invention is not limited to the above embodiments, and various modifications can be made based on the spirit of the present invention, and these modifications are not excluded from the scope of the present invention.

[0035]

According to the present invention, it is possible to shorten the process of folding and bending the leading end portion of the strip plate material, and to drastically reduce the equipment cost and the die cost to realize labor-saving automation at low cost. Methods and apparatus can be provided.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a lap-folded product.

FIG. 3 is a side view showing a bending member.

FIG. 4 is a side view showing a movable member.

FIG. 5 is a side view showing an arm member.

FIG. 6 is a side view showing a bending operation.

FIG. 7 is a side view showing the folding operation.

FIG. 8 is a side view showing a restoring operation.

FIG. 9 is a conceptual diagram showing a first step.

FIG. 10 is a conceptual diagram of a second step showing a conventional example.

FIG. 11 is a conceptual diagram showing the third step.

FIG. 12 is a conceptual diagram showing the fourth step.

[Explanation of symbols]

1a Strip plate material having a substantially inverted V shape 1d product 2 Bending member 2a Tip of bending member 3 rotating pieces 3a Komabe 4 rotating arm 5 springs 8 rotation axes 9 Lower part 11 Cam member 11a protrusion 12 Press members 13 pads 15 Spring material 16 Upper stand W tip Wa Tip side bending part Wb Base side bent part B base

Claims (3)

(57) [Claims] 1. A folding method for folding an end portion of a strip plate material, the tip portion of which is formed into a substantially inverted V shape so as to have a tip-side bent portion and a base-side bent portion. The base of the strip is placed on the lower base, and the upper is lowered to hold the base of the strip between the lower and the base.
Press, and then bending the base side bent portions of the strip plate material by rotating the member
Bending to the base side of the strip plate while pressing, then
Rotate and return to a position that does not interfere with the pressing process, then lower the press member to press the tip side bent portion of the strip plate against the base side bent portion and fold the tip end portion over the base portion. A bending method characterized in that 2. A bending device for folding and folding the above-mentioned tip portion of a strip material which has a tip portion bent into a substantially inverted V shape and has a tip-side bent portion and a base-side bent portion. And a lower base part on which the base part of the strip material is placed, an upper base part that is vertically movable and holds the base part of the strip material between the lower base part when descending, and is configured to be rotatable, the upper base part and the lower base part. The base is in between
Push the bent portion of the held strip plate at the base side by rotating it in the forward direction.
Bend to the base side while applying pressure, and then rotate in the opposite direction to return to the original position.
The bending member is configured to move up and down, and the bending member has returned to its original position.
Later, the base part is clamped between the upper and lower parts by descending.
And the base end side bent part is bent to the base side
While pressing the tip end side bent part of the base end side bent part,
A bending device , comprising: a press member that folds an end portion over the base portion . 3. The angle between the base side bent portion and the base portion is 14
The folding device according to claim 2 , wherein the bending device is in the range of 5 degrees to 155 degrees .