JPH10175019A - Central window working device of door panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bend into an L shape along the whole periphery of a central window opening part. SOLUTION: This device is provided with a lower die 10 which is divided into plural pieces in the left and right direction and provided an inclined surface from the back side to the front side and a first upper die 4, and ironing/bending is executed between the back edge end of the lower die 10 and the front edge end of the first upper die 4 by descending a press brake ram 2. In this case, since the back edge end part of the lower die arranged in both left and right ends of the lower die 10 is smoothly cut off into a triangular pyramid, the edge part of the bent line is smoothly risen. Therefore, when corner bending is respectively applied to two long sides and two short sides, the whole periphery of the central window opening part is smoothly bent into the L shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a middle window processing apparatus for bending an edge of a middle window of a door panel into an L-shape, and more particularly to a technique for enabling bending of the entire edge of the middle window. About.

[0002]

2. Description of the Related Art Generally, when a middle window such as a lighting window is formed in a door panel, a rectangular opening is punched in a desired portion of the door panel, and an edge of the opening is formed into, for example, an L-shape or a corrugated opening. , And attach a shoji, gull, louver, etc. to this part. As a method for processing the middle window of such a door panel, for example, a method described in Japanese Patent Publication No. 5-38659 is known.

FIG. 7 is an explanatory view showing the structure of a work material when a center window is machined using the above-mentioned conventional apparatus. As shown in FIG. Punching out the portion 102, and
A small rectangular opening 103 is also punched in the corner. Then, the folding margin 104 along the four sides of the opening 102 is folded in a U-shape. Further, the work material 101 is bent in an L-shape along a folding margin 105 around the periphery. As a result, the work material 101 on which the middle window is formed as shown in FIG.
Can be created.

However, in such a conventional method for processing a middle window, it is necessary to punch small openings 103 at four corners of the opening 102 in order to bend the folding margin 104 as described above. Therefore, when attaching a shoji, a rag, or the like, a gap is formed at the four corners, and it is necessary to fill the gap with a packing or the like to cover this part. In addition, the width of the middle window is limited by the size of the bending tool, and in the above-described conventional apparatus, the minimum width is 130 mm.
It was not possible to process the middle window to a width smaller than this. For this reason, for example, there is a disadvantage that a slit-shaped opening cannot be punched out to form a window for daylighting.

[0005]

As described above, in the conventional center window processing apparatus, the processed center window 4
There is a drawback that a packing or the like must be attached to a corner portion, and further, there is a problem that a narrow middle window cannot be machined.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an L along the entire periphery of an opening punched for a middle window.
It is an object of the present invention to provide a middle window processing apparatus for a door panel which can be bent in a character shape and can be bent with a narrow width.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, the length of the bending die is changed according to the length of the middle window of the door panel, and the opening end of the middle window is opened. In a middle window processing device for a door panel that bends an edge into an L-shape, a plurality of mold members are located below a surface from which a work is sent out, and a plurality of mold members are arranged in parallel in a direction orthogonal to the work sending direction. An end surface is an inclined surface descending from the downstream side toward the upstream side toward the upstream side, and a lower mold in which edges of mold members disposed at both ends are smoothly cut off in a triangular pyramid shape; A first upper die fixed to the upper die block and having a front edge substantially aligned with a rear edge of the lower die, and lowering the upper die block by pressing pressure. A ram and a rear part of the lower mold, wherein the first upper mold When being lowered the contact with the workpiece material, it is characterized with, a first cushion member supporting elastically from below the workpiece material.

According to a second aspect of the present invention, there is provided a second upper die which is located above the work material delivery surface and whose rear edge is arranged substantially coincident with the front edge of the lower die. A second cushion member that is disposed below the second upper mold and that elastically supports the work material from below when the second upper mold is lowered and comes into contact with the work material. And the second upper mold is
It is rotatably fixed to the upper die block, and when it is lowered by the rotation operation, the second upper die performs the bending, and when it is moved upward, it can be switched so as not to perform the bending. It is characterized by having. The invention according to claim 3 is characterized in that a dividing spacer is disposed below the plurality of mold members constituting the lower mold and determines which one of the mold members works effectively.

According to the present invention constructed as described above, first, one long side of the middle window opening of the work material is aligned with the bending position, and in this state, the first upper die is lowered by the pressing pressure. . As a result, one long side of the middle window opening is bent into an L-shape at this sawing position, and both ends of the lower mold are smoothly cut off in a triangular pyramid shape. The corner of the window opening is smoothly bent and lowered. Next, the workpiece is rotated by 180 °, and the other long side is aligned with the bending position, and bending is performed in the same manner as described above. This gives two long sides and 4
The corner will be bent into an L-shape. Then, if the width of the lower mold is changed and the two short sides of the middle window opening are bent in the same manner as described above, the entire periphery of the middle window opening is L-shaped by a total of four bending operations. You can bend it.

If the length of the short side of the opening of the middle window coincides with the width of the lower die in the front-rear direction, it is not necessary to perform four bending operations. By using and performing the bending, the entire periphery of the middle window opening can be bent into an L-shape by a single sawing operation.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a configuration of a center window processing apparatus according to an embodiment of the present invention. As shown in FIG. 1, the center window processing apparatus is a lower mechanism for placing a work material 1 of a door panel. 52, and an upper mechanism 51 for applying a bending pressure to the workpiece 1 from above.

The upper mechanism 51 includes a hydraulic cylinder (not shown).
A press brake ram 2 for transmitting pressure from the upper mold block 3, an upper mold block 3, a first upper mold 4 attached to the lower side of the upper mold block 3 in the work material flow direction, and the first upper mold 4. And a second upper mold 5 which is disposed at a predetermined distance from the upper mold 4 and is mounted on the upstream side in the workpiece material flow direction.
As shown in the cross-sectional view taken along the line XX ′ of FIG. 2, both side curved dies 8, 9 are fixed to the left and right sides in the flow direction of the work material 1 by latches (not shown). As will be described later, the short side of the middle window opening is bent.

The first upper die 4 shown in FIG. 1 is fixed to the upper die block 3 by a latch 6, while the second upper die 5 rotates a rotary shaft 7 attached to the upper die block 3. It is rotatable upward (in the direction of arrow “A” in the figure) as a center.

The lower mechanism 52 is, as shown in FIG.
A lower mold 10 is installed near the center, and the rear edge 10a of the lower mold 10 substantially coincides with the front edge 4a of the first upper mold 4 described above. Edge 10b is second
Of the upper die 5 substantially coincides with the rear edge 5a. Therefore, when the upper block 3 is lowered at a constant pressure, the work material 1 is bent by the trailing edge 10a of the lower mold 10 and the front edge 4a of the first upper mold 4, and When the upper die 5 of the second upper die 5 is lowered, the trailing edge 5 of the second upper die 5
a and the front edge 10b of the lower die 10 allow the work material 1 to be sawed and bent.

As shown in FIG. 3, the lower mold 10 is inclined such that the upper end surface becomes lower from the rear edge 10a toward the front edge 10b, and as shown in FIG. , And is divided into a plurality (n) in the left-right direction. Each of the lower dies 10-1, 10-2, 10-
3, ........., 10-n (not shown after 10-3), the edges of the lower dies 10-1,10-n arranged at both ends are notched smoothly chamfered into a triangular pyramid shape The surface 10c is set.

Further, as shown in FIG.
A plurality of divided spacers 15 are arranged below 0, and each divided spacer 15 is connected to a plurality of chain pieces constituting the chain 16, respectively. Then, the chain 16 is rotated so that the divided spacers 15 (15-1 to 15-
By moving n), the number of effective lower molds 10 among the plurality of lower molds 10 can be determined. That is, the chain 16 is meshed with the sprocket 18, and the rotating shaft 19 connected to the center of the sprocket 18 is driven to rotate by a motor (not shown), so that the split spacer 15 is sent out to the lower side of the lower mold 10. When the division spacer 15 is arranged on the lower side, the lower die 10 is lifted upward, and the bending operation can be performed using the lower die 10.

The leading end 15-n of each of the divided spacers 15 is chamfered into a smooth arc at the edge, and each of the lower molds 1 is divided at the edge.
0 and can be lifted upward in contact with the side surface. This will be described in more detail with reference to FIG. 2. When the edge of the split spacer 15-n is in contact with the side surface of the lower mold 10-4, the chain 16 is moved in the direction of arrow "C" in the figure. Then, the lower mold 10-4 is lifted upward, and the divided spacer 15-n is inserted below the lower mold 10-4. Thus, the effective number of lower dies 10 can be set by rotating the chain 16.

As shown in FIG. 1, a first cushioning material 11 which descends with a constant urging force when the first upper mold 4 descends is disposed on the rear side of the lower mold 10 as shown in FIG. A spring member 12 for providing a biasing force is provided below the first cushion member 11. Similarly, lower mold 1
A second cushion member 13 is disposed on the front side of the second cushion member 0 with a constant urging force when the second upper mold 5 descends, and a spring member 14 is provided at a lower portion of the second cushion. Are located. Also, as shown in FIG.
A cushioning material 2 is provided on the lower side opposite to both side curved shapes 8 and 9.
0, 21 are arranged, and further, each cushion material 2
A spring member (not shown) is arranged below 0,21. Note that an elastic member such as rubber or a cylinder may be used instead of the spring material.

Next, the operation of the present embodiment configured as described above will be described. When performing the middle window processing of the work material 1 using the middle window processing apparatus of the present embodiment, first, an operation of notching the opening for the middle window in the work material 1 to a predetermined size is performed. That is, as shown in FIG. 4, a rectangular opening 22 is punched in a proper position of the work material 1, and 4
A U-shaped notch 23 is formed at the corner. Then, the work material 1 is manually sent out to the center window processing apparatus shown in FIG. 1 in the direction of arrow “B” in FIG. Front edge 4a
(The position of the trailing edge 10a of the lower mold 10). At this time, the length of the lower mold 10 is determined so as to be the same as the length of the long side of the middle window to be processed into the work material 1. That is, each lower mold 10-1 to 10-n divided into a plurality
By extracting a predetermined number from (see FIG. 2), the length of the long side of the middle window (the distance of the line L1) and the distance of the lower mold 10 in the left-right direction are set to be the same. At this time, since the lower dies 10-1 and 10-n at both ends are notched in a triangular pyramid shape as described above, the lower dies 10-1 and 10-n cannot be removed, and accordingly, , Lower mold in the middle 10-2-10
The width is determined by extracting a predetermined number from -n-1.

Next, the drive motor is operated to rotate the sprocket 18 so that the split spacers 15 are set below the lower molds 10. Therefore, all the lower dies 10 arranged are lifted by the split spacers 15. In addition, the second upper mold 5 with the rotation shaft 7 as the center.
By rotating the upper mold 5, the upper mold 5 is lifted upward (the case of using the second upper mold 5 will be described later). Then, when the press brake ram 2 is lowered in this state, as shown in FIG.
The first upper mold 4 and the first cushion material 11 are lowered by contact with the cushion material 11 of FIG. At this time, since the lower die 10 is in a fixed state, a lever bending is performed between the front edge 4a of the first upper die 4 and the rear edge 10a of the lower die 10, as shown in FIG. It is bent at right angles along the line L1. At this time, since both ends of the lower mold 10 are smoothly processed into a triangular pyramid shape as described above, the corners 23 of the middle window opening 22 are formed.
Will be bent so as to rise gradually.
That is, as shown in FIG. 5, when the long side L1 is bent in the direction of 90 °, the lower mold 10-1,1 cut off in a triangular pyramid shape is formed.
By 0-n, the corner 23 and the edge of the short side L4 are processed to be gradually bent.

When the bending is completed, the press brake ram 2 is raised to remove the work material 1,
This time, the work material 1 is rotated by 180 ° and the same sawing and bending operation is performed. As a result, it is bent at a right angle along the line L2 shown in FIG. 4, and further, the corner 23 is bent so as to gradually rise in the same manner as described above. Thus, the two long sides L1, L2 and the four corners of the middle window are bent in an L shape.

Thereafter, the number of the split spacers 15 is changed by rotating the sprocket 18 shown in FIG. 2 and the width of the lower die 10 is set to be slightly shorter than the lengths of the short sides L3 and L4 of the opening 22. . For example, each lower mold 10 (10-1 to 10-
In the case of n), when five lower dies 10 are used, the sprocket 18 is rotated so that the divided spacers 15 are arranged only below the five lower dies 10. In this case, the lower die 1 having a triangular pyramid-shaped notch at the edge is used.
It is not necessary to use 0-1,10-n,
There is no need to remove the work. Then, with the width determined, the work material 1 is rotated by 90 ° to align the bending position with the line L3.
To perform the bending work. At this time, the line L3
Since both ends have already risen gently, corner 2
3 and the side portion (line L3) can be smoothly bent together. Similarly, this time, the bending work is performed by adjusting the bending position to the line L4. Thus, the entire four circumferences of the middle window opening 22 can be bent into an L-shape.

As described above, in the present embodiment, the length of the long side (line L1, L2) of the middle window to be processed is
Set the number of lower molds 10 (10-1, 10-n) to be used,
By arranging the division spacer 15 on the lower side of each lower mold 10, the bending operation by each lower mold 10 is made effective,
Two long sides are bent and then divided spacer 1
The number of arrangements of 5 is changed according to the length of the short sides (lines L3, L4), and the two short sides are cut and bent. In such an operation, if the number of lower molds 10 is set as an initial setting, the number of lower molds 10 that are effective by rotating the sprocket 18 to change the number of lower molds 10 that are effective is changed. The operation is easy because each can be bent. Further, since the edge of the lower mold 10 is smoothly cut off in a triangular pyramid shape, the corner can be raised up smoothly, and the finished state is good.

Next, an example in which the second upper mold 5 is used will be described. Now, when the lengths of the short sides L3 and L4 of the middle window to be processed are the same as the longitudinal distance L5 of the lower mold 10 (see FIG. 1), the second upper mold 5 is lowered to the lower side. Perform bending work in the state. Then, the two long sides of the middle window opening are to be bent by one press, and the short sides are also to be bent in the perpendicular direction. Therefore, the length of the short sides L3 and L4 is equal to the width L of the lower mold.
If it is the same as 5, it is not necessary to perform the four bending operations as described above, and the center window can be machined with one press.

In the middle window processing apparatus of the present embodiment, any opening having a short side longer than the width L5 of the lower die can be bent, so that the opening having a narrow width can be formed. Even if it is, the bending process can be surely performed.

[0026]

As described above, according to the middle window processing apparatus of the present invention, the long side saw bending twice and the short side saw bending two times.
The middle window of the door panel can be processed by a total of four press operations. The length of the long side and the length of the short side can be arbitrarily changed (in units of the width of the lower mold) by changing the number of the plurality of divided lower molds. Can be processed corresponding to the middle window. Further, since the edge of the lower die is smoothly cut into a triangular pyramid shape, the four corners of the middle window are smoothly bent, and the finish is better than in the past.

When the length of the short side of the middle window to be processed is the same as the width in the front-rear direction of the lower die, the bending is performed using both the first upper die and the second upper die. By performing the work, it becomes possible to bend the periphery of the middle window opening by 90 ° by one press, and the workability is further improved.

Further, in the center window processing apparatus of the present invention, the bending process can be performed on an opening having a short side longer than the width L5 of the lower die (see FIG. 1). An opening having a narrower width can also be bent.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a configuration of an embodiment of a center window processing apparatus to which the present invention is applied.

FIG. 2 is a sectional view taken along the line XX ′ of the center window processing apparatus shown in FIG. 1;

FIG. 3 is a perspective view showing a configuration of a lower die.

FIG. 4 is an explanatory view showing a configuration of a middle window opening portion pre-processed on a work material.

FIG. 5 is an explanatory diagram showing a state after the long side of the middle window opening is bent in an L-shape.

FIG. 6 is an operation explanatory view showing a state in which a bending work is performed using the middle window processing apparatus of the embodiment.

FIG. 7 is an explanatory view showing the shape of a center window opening when processing is performed using a conventional center window processing apparatus.

FIG. 8 is an explanatory view showing a state in which the work material having the middle window opening shown in FIG. 7 is processed.

[Explanation of symbols]

 Reference Signs List 1 work material 2 press brake ram 3 upper die block 4 first upper die 5 second upper die 6 latch 7 rotation shaft 8,9 both side curved die 10 lower die 11 first cushion material 12,14 spring material 13 Second cushion material 15 Split spacer 16 Chain 17 Lower mold adjusting mechanism 18 Sprocket 19 Rotary shaft 20, 21 Cushion material 22 Opening 23 Corner 51 Upper mechanism 52 Lower mechanism

Claims (3)

[Claims] 1. A middle panel processing apparatus for a door panel, wherein the length of a bending die is changed according to the length of the middle window of the door panel to bend the edge of the middle window opening into an L shape. Is also located on the lower side, a plurality of mold members are arranged side by side in a direction orthogonal to the workpiece feeding direction, and the upper end surface is an inclined surface descending from the downstream side to the upstream side toward the upstream side, and A lower mold in which edges of mold members arranged at both ends are smoothly cut into a triangular pyramid shape; a lower mold positioned at an upper side than the work delivery surface and fixed to an upper mold block; A first upper die arranged substantially coincident with a trailing edge of the lower die, a ram for lowering the upper die block by pressing pressure, and a ram disposed at a rear portion of the lower die and the first upper die descending When the workpiece is brought into contact with the workpiece, the workpiece is elastically moved from below. Chumado processing apparatus of the door panel, characterized in that it comprises a first cushion member, the support to. 2. A second upper die which is located above the work material delivery surface and whose rear edge is arranged to substantially coincide with a front edge of the lower die, and a lower portion of the second upper die. And a second cushion material that elastically supports the work material from below when the second upper mold is lowered and comes into contact with the work material, wherein the second upper mold is Is rotatably fixed to the upper mold block, and when it is lowered by the rotating operation, the second upper mold performs the bending, and when it is moved upward, it can be switched so as not to perform the bending. The middle window processing device for a door panel according to claim 1, wherein: 3. A split spacer which is arranged below the plurality of mold members constituting the lower mold and determines which one of the mold members works effectively.
A middle window processing apparatus for a door panel according to claim 2.