JPH09192747A - Device for machining inside window of door panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bend the circumference of an inside window of a door panel at right angles with a simple operation. SOLUTION: A 1st upper die 3 and a 2nd upper die 4 are arranged at a prescribed interval (width of a lower die 6), the upper face of the lower die 6 is made in a inclining face, and an edge part of the lower die is cut in a cone shape. Then, when one side long side of an inside window opening is bent with ironing at a right angles with a rear periphery 6b of this lower die 6 and the 2nd upper die 4, the short side is raised and bent at right angles. After then, the 2nd upper die is released, and when the other side long side is bent with ironing at right angles, the total circumference of the inside window opening is bent at right angles.

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 a middle edge portion of a door panel into an L shape, and more particularly,
The present invention relates to a technique capable of bending over the entire circumference of an edge portion of a middle window. The present invention relates to a technique capable of easily processing a narrow inner window.

[0002]

2. Description of the Related Art Generally, when forming a middle window such as a daylighting window on a door panel, a rectangular opening is punched out at a desired portion of the door panel, and the edge of the opening is formed into, for example, an L shape or a U-shape. Bend it in a shape and attach shoji, louver, louver, etc. to this part. As a conventional example of such a method for processing the inner window of a door panel, for example, one disclosed in Japanese Patent Publication No. 5-38659 is known.

FIG. 10 is an explanatory view showing the structure of a work material when processing the inner window using the above-mentioned conventional apparatus. As shown in the drawing, a rectangular opening is formed in a desired portion of the work material 101. Punching out 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 bent in a U-shape. Further, the work material 101 is bent into an L shape along the folding margin 105 at the peripheral portion. Thereby, the work material 101 having the inner window as shown in FIG. 11 can be prepared.

However, in such a conventional method for processing a center window, it is necessary to punch the small openings 103 at the four corners of the opening 102 in order to bend the folding margin 104 as described above. Therefore, when attaching shoji screens, louvers, etc., gaps are formed at the four corners, and it is necessary to attach packings or the like to cover these portions so as to fill the gaps. Further, the width of the center window is limited by the size of the sawing and bending tool, and in the above-mentioned conventional example device, the minimum width is about 130 mm, and the center window cannot be processed to have a width smaller than this. For this reason, there is a drawback that the slit-shaped opening cannot be punched out, for example, to form a window for lighting.

[0005]

As described above, in the conventional center window processing apparatus, the processed center window 4
There is a drawback that packing or the like has to be attached to the corner portion, and further there is a problem that a narrow middle window cannot be processed. The present invention has been made to solve such a conventional problem, and an object thereof is to bend it in an L-shape along the entire periphery of an opening punched out for a middle window. An object of the present invention is to provide a window processing device for a door panel that can be bent and has a narrow width.

[0006]

In order to achieve the above object, the present invention changes the length of a sawing-bending die according to the length of the middle window of the door panel so that the edge of the middle window opening is L-shaped. In a middle window processing apparatus for folding a door panel, a feeding mechanism that feeds a work material and a lower side than the work material feeding surface, and a plurality of mold members are arranged side by side in a lateral direction. The lower die, which is an inclined surface that descends from the delivery downstream side toward the upstream side, and whose edges of the die members arranged at both ends are smoothly cut in a triangular pyramid shape, and the work material delivery surface. Also located on the upper side, the rear edge of which is arranged substantially coincident with the front edge of the lower die and the first upper die and the front edge of which is arranged substantially coincident with the rear edge of the lower die. Ram for lowering the upper mold and the first upper mold and the second upper mold by pressing pressure , The front and rear stages of the lower die, respectively, and when the first upper die and the second upper die are lowered and come into contact with the work material, support the work material from below with flexibility. And a cushion material.

Further, a turning means is provided for turning the second upper die to cancel the interference with the work material when performing the sawing bending using the edge of the first upper die. Is characterized by. Further, the lower mold is formed with a fitting groove along the lateral direction of the central portion, and is fitted in the fitting groove between the first upper mold and the second upper mold so that the upper mold is fitted. It is characterized in that it has a protrusion that prevents the upper die and the lower die from being displaced during the lowering. According to the present invention configured as described above, when the work material is sent to the processing position from the sending mechanism and the second upper mold is lowered by a predetermined press pressure, each of the second upper mold and the lower mold is lowered. At the edge, one long side of the work material opening is bent into an L shape. At this time, since the edge of the lower die is cut out in a triangular pyramid shape, it is possible to smoothly raise the short side portions on both ends of the long side portion to be bent and bend it into an L shape.

Then, the second upper mold is rotated by the rotating means to cancel the interference with the work material, and then the work material is moved to move the work by the lower mold and the first upper mold. The other long side of the material opening is bent into an L shape. As a result, the entire circumference of the opening can be bent into an L shape. Further, by performing the work of bending the opening by such a method, it becomes possible to easily process even a narrow opening width as long as the width of the lower die is larger than the width of the lower die.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment of a middle window processing apparatus to which the present invention is applied. As shown in the figure, this middle window processing apparatus is roughly divided into a lower mechanism for placing a work material 14 which is a material for a door panel and an upper mechanism for applying a bending pressure from above. The upper mechanism includes a press brake ram 1 that transmits pressure from a hydraulic cylinder (not shown), an upper die block 2, a fixed holder 20 and a rotary holder 21 that are attached to the lower side of the upper die block 2, and a fixed holder. A first upper die 3 attached to the lower end of the rotary holder 20, a second upper die 4 attached to the lower end of the rotary holder 21, and a protrusion 5 for preventing slippage which is arranged substantially at the center of each upper die 3 and 4. And have.

A latch 15 and a mold clamp 16 are attached to fix the upper die block 2 and the fixed holder 20, and a latch 18 is attached to fix the rotary holder 21 and the second upper die 4. Has been. Rotation holder 2
1 is rotatable about a rotary shaft 10 supported by a bearing 19, and is rotatable about the rotary shaft 10 in the counterclockwise direction in the drawing by operating an operating lever 22. That is, by rotating the rotary holder 21, it is possible to set the second upper mold 4 so as not to interfere with the lower mechanism. Rotating holder 21 and upper mold block 2
A protrusion 17 with a spring is interposed in the contacting portion with and softens the impact when the rotary holder 21 contacts the upper mold block 2 and fixes the rotary holder 21 by this biasing force. ing.

On the other hand, in the lower mechanism, a cushion receiver 7 is arranged at a position facing the first upper mold 3, a cushion receiver 8 is arranged at a position facing the second upper mold 4, and each cushion is further arranged. The lower mold 6 is arranged between the receivers 7 and 8. The lower die 6 has an upper end surface inclined from the rear edge portion 6b side to the front edge portion 6c side, has a fitting groove 6a to be fitted with the above-mentioned shift preventing projection 5 in the central portion, and has a latch 9 It is fixed to the bed 23. A spring 11 is arranged below the cushion receiver 7, and when pressed by the first upper mold 3, the spring 11 is urged to move the cushion receiver 7 downward. Further, a hydric cushion 13 is arranged below the cushion receiver 8, and like the spring 11, the cushion receiver 8 moves downward when pressed by the second upper mold 4. Code 12
Is a feeding device for feeding the work material 14 to the processing device side.

FIG. 5 is a bottom view of the above-mentioned upper mechanism, that is, a view as seen from the direction of arrow AA shown in FIG. As shown in the figure, the first upper mold 3 and the second upper mold 4 are arranged in the lateral direction (the depth direction in FIG. 1) in plurality (four in the drawing), and this number is punched into the door panel. It is determined by the width of the inner window. Then, the first upper mold 3 and the second
As described above, the upper mold 4 and the upper mold 4 are separated from each other by a predetermined distance, and the shift preventing projection 5 is attached to the center of the upper mold 4. In addition, the first upper mold 3-1 located at both ends
The 3-4 and the second upper molds 4-1 and 4-4 are locked by a locking portion 31 formed at an end thereof, thereby preventing a lateral shift. Further, the rotary shaft 10 is connected to the operation lever 2
By rotating at 2, the connection at the locking portion 31 is cut off, and the pressing by the second upper mold 4 is released.

FIG. 6 is a plan view of the lower mechanism, that is, a view as seen from the direction of arrow BB shown in FIG. As shown in the figure, a plurality of lower molds 6 (four in the figure) are arranged along the lateral direction of the central portion, and the fitting groove 6 is formed in the center of each lower mold 6.
a is formed. Then, like the upper molds 3 and 4 described above, the number of lower molds 6 is determined by the width of the middle window. Further, the edge parts of the lower molds 6-1 and 6-4 located at both ends are
As will be described later, it is smoothly chamfered. Lower mold 6
Cushion receivers 7 and 8 are arranged in the front and rear stages of the above, of which the front cushion receiver 7 is provided with a plurality of springs 11, and the rear cushion receiver 8 is provided with a plurality of hydric components. A cushion 13 is provided. A connecting surface 32 for closing the opening is arranged outside the lower molds 6-1 and 6-4, and is supported by grooves 7a and 8a provided in the cushion receivers 7 and 8.

FIG. 7 is an explanatory view showing the shape of the opening 33 when the inner window is formed in the work material 14, and as shown in the drawing,
The middle window opening 33 is punched out in a rectangular shape as a whole, and a U-shaped cutout 34 is formed at each corner. A line L1 shown in the figure is a reference line when the front long side 33a of the middle window opening 33 is bent, and a line L2 is a reference line when the rear long side 33b is bent. . The line L3 is a line indicating the minimum width when determining the width of the short side 33c, and if the width is equal to or larger than the line L3, it is possible to perform the middle window processing. FIG. 8 is a lower mold 6-4 having the edge portion shown in FIG.
FIG. 6 is an explanatory view showing the configuration of the lower mold 6 as shown in the drawing, inclining downward from the rear edge 6b side to the front edge 6c side, and having a triangular pyramidal notch in the edge portion. 6d is formed.

Next, the operation of the present embodiment configured as described above will be described with reference to the respective explanatory diagrams showing the operating states shown in FIGS. First, as an initial setting, the longitudinal width of the middle window opening, that is, the long side 33a shown in FIG.
Is measured, and the number of mold members constituting the upper molds 3 and 4 and the lower mold 6 is determined according to this length. Next, the work material 14 to be processed is set in the feeding device 12 shown in FIG. 1, and the feeding device 12 is driven to send the work material 14 to the processing device side. As shown in FIG. 7, the work material 14 has the middle window opening 33 punched out, and is stopped when the position of the line L1 shown in FIG. 7 coincides with the rear edge portion 6b of the lower die 6 shown in FIG. .

In this state, when the press device is operated to lower the press brake ram 1, the work material 14 is pressed by the first upper mold 3 and the upper surface of the cushion receiver 7 at a predetermined pressure, and 2 upper mold 4 and cushion receiver 8
The work material 14 is pressure-bonded by the upper surface of the workpiece. At this time, since the shift preventing protrusion 5 is fitted in the fitting groove 6a, it is possible to prevent the positional displacement between the upper mechanism and the lower mechanism. Next, when the press brake ram 1 is further lowered, each of the cushion receivers 7 and 8 is lowered below the feeding surface of the work material 14, but the lower die 6 is fixed, so that the original position is maintained. To do. Therefore, as shown in FIG. 2, the work material 14 is bent substantially at a right angle by the rear edge 6b of the lower die 6 and the edge of the second upper die 4. That is, the work material 14 shown in FIG. 7 can be bent at a substantially right angle along the line L1. At this time, as described with reference to FIG. 8, the lower die 6-4 arranged at both ends has the triangular pyramid-shaped edge portion,
The short sides 33c and 33d of the middle window opening 33 gradually rise from the line L1 side and are bent at a right angle, as shown in FIG.

Next, the press brake ram 1 is raised, and as shown in FIG. 3, the rotary shaft 10 is rotated to rotate the rotary holder 21 to which the second upper mold 4 is attached.
Is rotated approximately 90 °. As a result, the second upper mold 4
Is oriented in the lateral direction and is not involved in the pressing operation.
Then, the work material 14 is moved in the delivery direction, and this time, since the rear long side 33b side of the middle window opening 33 shown in FIG. 7 is bent, the line L2 is aligned with the front edge 6c of the lower die 6. .

Then, when the press brake ram 1 is lowered again in this state, only the first upper mold 3 comes into contact with the work material 14 this time, and the work material 14 is pressed with the cushion receiver 7. become. After that, when the press brake ram 1 is further lowered, as shown in FIG. 4, the work material 14 is formed between the front edge 6c of the lower die 6 and the edge of the first upper die 3.
The inner window opening 3 shown in FIG. 7 will be bent.
The long side 33b of 3 is bent in a substantially right angle direction. At the same time, the edges of the lower die 6 also bend the short sides 33c and 33d in the right angle direction,
As a result, the entire periphery of the middle window opening 33 is bent in the right angle direction. Further, when performing this operation, it is necessary to lower the work material 14 placed on the cushion receiver 8 as well, so that the hydric cushion 13 is synchronized and the cushion receiver 8 is lowered.

Therefore, if the inner window thus formed is used, shoji, louvers, louvers and the like can be easily and aesthetically attached. Further, when the opening width of the middle window is long, that is, the line L1 and the line L shown in FIG.
When the distance from 2 is long, the short sides 33c and 33d may not rise smoothly and may not be bent at right angles by the two pressing operations as described above. In such a case, after the rear edge 6b of the lower die 6 is aligned with the line L1 and the saw is bent, the front edge 6c of the lower die 6 is immediately moved to the line L2.
Work piece 14
Press the slide multiple times while sliding. By performing such an operation, the short sides 33c and 33d of the middle window opening 33 can be raised smoothly. In addition, as a result of an experiment by the inventor, it is preferable that the distance to be sent out at one time when the work material 14 is gradually slid is about 5 to 7 [mm].

In this way, according to this embodiment, when processing the middle window of the door panel, the entire periphery of the middle window opening 33 can be bent at a right angle by a simple operation.
There is no need to perform work such as mounting packing on the corners as in the conventional case, and not only the labor required for processing is reduced, but also the appearance is improved. Further, even when the width of the middle window is narrow, the window can be easily processed. Therefore, for example, a narrow window for daylight can be easily processed.

[0021]

As described above, according to the present invention,
When forming the middle window on the door panel, it is possible to easily fold each side portion around the middle window opening into an L-shape.
Can easily be attached to louvers, louvers, etc. Further, it is not necessary to attach packing or the like to the corners, which not only reduces the burden on the operator, but also improves the appearance. Further, even in the narrow opening, the periphery can be easily bent into an L shape, so that an effect that the narrow slit can be easily formed can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a door panel inner window processing apparatus according to the present invention.

FIG. 2 is a first operation explanatory diagram of the inner window processing device according to the present embodiment.

FIG. 3 is a second operation explanatory diagram of the inner window processing device according to the present embodiment.

FIG. 4 is a third operation explanatory diagram of the inner window processing device according to the present embodiment.

FIG. 5 is a bottom view of the upper mechanism of the inner window processing device according to the present embodiment.

FIG. 6 is a plan view of a lower side mechanism of the inner window processing device according to the present embodiment.

FIG. 7 is an explanatory view showing the shape of a middle window opening.

FIG. 8 is an explanatory diagram showing a detailed configuration of a lower die edge portion.

FIG. 9 is an explanatory view showing how the short side of the middle window opening rises.

FIG. 10 is an explanatory view showing the shape of a middle window opening when processing is performed using a conventional middle window processing device.

11 is an explanatory view showing a state where the work material shown in FIG. 10 is processed.

[Explanation of symbols]

 1 Press Brake Ram 2 Upper Die Block 3 First Upper Die 4 Second Upper Die 5 Displacement Protrusion 6 Lower Die 6a Fitting Groove 7,8 Cushion Receiver 7a, 8a Groove 9,15,18 Latch 10 Rotating Shaft 11 Spring 12 Feed device 13 Hydric cushion 14 Work material 16 Type clamp 17 Spring protrusion 19 Bearing 20 Fixed holder 21 Rotating holder 22 Operation lever 23 Bed 31 Engagement part 32 Connecting surface 33 Middle window opening 34 Notch

Claims (3)

[Claims] 1. A work material is sent out in a work machine for processing a middle window of a door panel, in which the length of a sawing-bending die is changed according to the length of the middle window of the door panel, and the end edge of the middle window opening is bent into an L shape. A delivery mechanism and an inclined surface that is located below the work material delivery surface and is configured by arranging a plurality of mold members side by side in the lateral direction, and the upper end surface descends from the delivery downstream side to the upstream side. And a lower die in which the edges of the die members arranged at both ends are smoothly cut in a triangular pyramid shape, and a rear edge of the lower die located above the work material feeding surface. A first upper mold and a second upper mold whose front edge is arranged substantially coincident with a front edge and a second upper mold whose front edge is substantially coincident with a rear edge of the lower mold; and the first upper mold and the second upper mold. A ram for lowering the upper mold by pressing pressure, and a ram arranged in front and rear of the lower mold, respectively. The first
A middle window processing for a door panel, which comprises: a cushion material that flexibly supports the work material from below when the upper mold and the second upper mold are lowered and come into contact with the work material. apparatus. 2. A turning means is provided for turning the second upper die to cancel interference with the work material when performing sawing and bending using the edge of the first upper die. The middle window processing apparatus for a door panel according to claim 1, wherein: 3. The lower mold is formed with a fitting groove along a lateral direction of a central portion, and is fitted in the fitting groove between the first upper mold and the second upper mold. 2. A protrusion for preventing the upper mold and the lower mold from being displaced when the upper mold is lowered.
Alternatively, the door window middle window processing device according to claim 2.