JPS589747B2 - Groove forming device for elastic sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for continuously forming grooves in a long soft elastic sheet.

Conventionally, for example, as the skin of an automobile seat, a foamed urethane sheet with several grooves on the surface side was sewn together between the front material and the lining material, and the inner foamed urethane sheet was sewn onto the surface of the skin. The grooves in the grooves are used to create an uneven pattern.

By the way, it is extremely difficult to form grooves of a certain depth in a flexible elastic sheet material such as urethane foam, and conventionally the grooves are formed by scraping the sheet surface with a grinder or milling cutter, but in this case The debris becomes powder or coarse particles and is scattered around.
It is very difficult to completely collect and remove the shavings using a vacuum device, and some shavings remain on the sheet surface. Therefore, when the outer material and lining material are polymerized, the remaining shavings will be removed. The fabric would swell up into a convex shape, and the surface would be uneven due to being sewn as is, which would significantly reduce the value of the product.

This invention was made to eliminate such drawbacks, and its first purpose is to form grooves in the elastic sheet fed on the upper surface of the base with the vertical cutting blade and the bottom cutting blade, and to To provide a groove forming device for an elastic sheet, which makes it extremely easy to collect chips by making the chips string-like.

A second object of the present invention is to press a rotating body for guiding the elastic sheet in the feeding direction between the vertical cutting blade and the bottom cutting blade, and a portion between both side walls of the groove immediately before the bottom cutting blade. An object of the present invention is to provide a groove forming device for an elastic sheet, which is provided with a pressing piece for cutting, and which allows the cutting action of a bottom cutting blade to be performed more smoothly.

A third object of the present invention is to collect chips from a plurality of grooves formed on the surface of an elastic sheet using suction conduits arranged individually for each groove position. An object of the present invention is to provide a groove forming device for an elastic sheet, which allows for smoother recovery.

Next, embodiments of the present invention will be described with reference to the drawings.

1 is a base whose upper surface serves as an elastic sheet feeding surface, and is installed between the fuselage frames (not shown) so as to be vertically adjustable;
The elastic sheet A is fed between the fuselage frames from right to left (in the direction of the arrow in FIG. 1) on the upper surface of the base 1 in a direction perpendicular to its longitudinal direction.

Reference numeral 2 denotes vertical cutting blades provided above the base 1, which are arranged in parallel at intervals of the grooves B to be formed on the rotating shaft 3 mounted between the machine body frames.

Each vertical cutting blade consists of left and right round blade bodies 2a;
A is rotated through a spacer 4 having the same width as the groove B to be formed. The mounting body 5 is fitted onto the shaft 3, and the mounting body 5 is fitted onto the shaft 3.
It is fixed to the mounting body 5 by a side surface of the large-diameter portion 5' at one end and a tightening nut 6 screwed to the other end, and the rotating shaft 3
It rotates with the rotation of the groove B to simultaneously form both side walls of the groove B with respect to the sea }A.

7 is a screw for fixing the mounting body 5 to the one-rotation shaft 3.

8 is a sheet holding plate located at the bottom of each vertical cutting blade 2;
It makes light contact with the upper surface of the sheet A being fed on the base 1, so that the cutting action by the vertical cutting blade 2 can be performed smoothly, and one end is attached to the holding plate mounting base 9 with screws 7. There is.

The mount 9 is fixed at both ends to a support 11 fixed to the base 1, and moves up and down together with the base 1.

Each vertical cutting blade 2 has its blade portion 2b facing downward from the holding plate 8 through the long hole 8' of the holding plate 8.

12 is a bottom cutting blade for forming the bottom surface of the groove B provided at the rear (sheet feeding direction) of each vertical cutting blade 2; 13 is a sheet A;
A sprocket-like rotating body, 1, to guide the
Reference numeral 4 denotes a sheet suppressing piece for assisting the cutting action of the bottom cutting blade 12, and the bottom cutting blade 12, rotating body 13, and pressing piece 14 are supported above the base 1 in the following manner.

That is, the base of the tool rest 15 for attaching each bottom cutting blade 12 is connected to the bottom cutting blade drive shaft 16 mounted between the machine frames.
The upper surface of each tool rest 15 is loosely located so as to correspond to each vertical cutting blade 2, and its tip is positioned so as to protrude in the direction of the vertical cutting blade 12 and substantially parallel to the upper surface of the base 1. Link.

Reference numeral 18 denotes a sheet holding member suspended from the tool rest 15 by plates 19 on the left and right sides so as to be located below the tip of the tool rest 15;
A through hole 18' is provided inside, and the lower surface lightly contacts the upper surface of the sheet A being fed on the base 1.

Then, the shaft part 12b, which is erected at the center of the round blade part 12a of the bottom cutting blade 12, is passed through the through hole 18' from the lower surface of the holding member 18, and vertically installed at the tip of the tool rest 15 so as to be freely rotatable. The bottom cutting blade 12 is supported by the tool rest 15 by fitting the upper part of the shaft part 12b into the lower part of the vertical shaft 20 and fixing it with the screw 21.

By forming the diameter of the blade portion 12a of the bottom cutting blade 12 to be slightly larger than the width of the groove B, while the sheet A is being fed from the position of the vertical cutting blade 2 to the position of the bottom cutting blade 12, Even if it shifts to the side a little, it will still be possible to cut clearly between the both side walls of the groove B that was previously formed.

The pressing piece 14 extends obliquely from the tip of the tool post 15 through the hole 18' of the holding member 18 so that its lower part is close to the bottom cutting blade 12, and is bent in the middle. It is bent so that the lower part hangs down parallel to the shaft part 12b, and the width of the lower part is formed to be the same as the width of the groove B, and the chips C of the groove part cut from the sheet A are attached to the shaft part 12b.
The shaft part 12b side is curved so as to be convex so that it can easily escape in the direction of rotation of the blade part 12b.
It is located slightly above (see Figure 3).

Reference numeral 23 denotes a nut screwed onto the upper end of the cylindrical body 22 fitted on the outside of the vertical shaft 20. By screwing this nut 23, the bottom cutting blade 12 can be adjusted up and down. The depth of each groove B can be changed individually.

24 is a washer, and 25 is an adjustment plate for the vertical shaft 20.

Further, the rotating body 13 is pivotally supported in a through hole 18' of the holding member 18 so as to be located on the side of the vertical cutting blade 2, and its teeth 13a protrude downward from the lower surface of the holding member 18, and the rotating body 13 is located on the vertical cutting blade 2 side.
It is located at the center between both side walls of the groove B formed by the groove B, and is rotated by the feeding of the sheet A.

Reference numeral 26 denotes a tool post lifting arm (only one is shown in the figure) located further outside of the tool post 15 on both sides.The base is loosely attached to the drive shaft 16 like the tool post 15, and the tip is a vertical cutting blade. cradle 2 installed horizontally between the fuselage frames beyond the top of 2
It extends to the top of 7.

The lower surface of this arm 26 is fixed to a rod 17 with a bolt, and by lifting the tip of the arm 26 during inspection etc., each tool rest 15 can be pulled upwards around the drive shaft 16 ( 3), the bottom cutting blade 12 can be separated from the base 1.

However, normally, the arm 26 is fixed to a pedestal 27 or the like to prevent each tool rest 15 from moving freely.

Reference numeral 28 denotes a depth adjusting bolt of a groove screwed onto the tip of the arm 26. By adjusting the screwing of this bolt 28, the arm 2 is adjusted.
6 is adjusted, and as a result, the height of the bottom cutting blade 12 attached to each tool post 15 is adjusted.

29 is a horizontal frame passed between the body frames above the sheet A being fed; 30 is an intermediate bearing of the drive shaft 16, which is fixed to the horizontal frame 29;

31 is a driving pulley fixed to the upper part of the vertical shaft 20, 32 is a floating pulley pivotally supported on the lower surface of the tool rest 15, and 33 and 34 are pulleys located on both sides of the tool rest 15. In the case of Fig. 2,
One pulley 33 is fixed to the drive shaft 16 with a screw 45, and the other pulley 34 is made free with respect to the drive shaft 16.The positions of the pulley 33 fixed to the drive shaft 16 and the pulley 34 that freely rotate This is done alternately for each turret 15.

And round belt 3 is attached to these pulleys 31, 32, 33, 34.
6 are hung over each other so that the rotation direction of each bottom cutting blade 12 is alternately opposite as shown by the arrow in the figure, so that the seat A does not shift to one side when making a cut.

Reference numeral 37 denotes a suction conduit for collecting chips C provided at each position of the groove B behind each bottom cutting blade 12 (in the sheet feeding direction), one end of which is positioned above the groove B, and the other end of which is a vacuum conduit. It is in communication with a device (not shown).

The suction port is slightly expanded as shown in the figure.

Although not shown, rotation is transmitted to the rotating shaft 3 and the driving shaft 16 from an electric motor installed in the fuselage via a suitable transmission mechanism.

The present invention has the above-described configuration, and the case where a groove is formed in a foamed urethane sheet having a thickness of 15 mm by this prosthesis will now be explained.

First, the height of the base 1 is adjusted so that the cutting depth of the vertical cutting blade 2c relative to the seam A is slightly deeper than the depth of the groove B (for example, 3 mm).

In this way, the front of the device of the present invention (left side of the drawing)
The urethane sheet A wound into a roll is pulled out and introduced onto the base 1, and while driving the rotating shaft 3 and making cuts A at the locations that will become both side walls of the groove B using the vertical cutting blade 2,
The sheet A is sent rearward, and then the bottom of the groove B is cut by the bottom cutting blade 12, and the chips C in the groove B are individually sucked and collected by the conduit 37, The body 13 is rotated as the sheet A is fed, and at the position of the rotating body 13, the sheet A being fed is rotated by the teeth 1.
3a onto the base 1, guide it in the feeding direction with the cuts A on both sides widened (Fig. 4).

Therefore, it is possible to prevent the sea } A being fed to the position of the bottom cutting blade 12 from shifting sideways or dancing up, and the part between the cutting edges A is reliably fed to the position of the bottom cutting blade 12. The bottom surface of the groove B can be formed smoothly.

Immediately before the bottom cutting blade 12, the lower end of the pressing piece 14 presses the area between both side walls onto the base 1 with a constant pressure, so when cutting with the bottom cutting blade 12, the depth of the groove B is kept constant. Moreover, since the cut A in both side walls is formed to be slightly deeper than the depth of the groove B, the space between the both side walls can be reliably cut.

Therefore, the chips C are formed into a string shape with a groove-shaped cross section, and after once escaping from between the pressing piece 14 and the shaft portion 12b in the direction of rotation of the shaft portion 12b, they fit into the groove C again, and then each The chips C in the groove B are separately suctioned and collected in the form of strings through the conduit 27, and are also removed by the vertical cutting blade 2 and the bottom cutting blade 1.
At the same time, a small amount of chips generated during the cutting by 2 is also completely suctioned and collected by the conduit 27.

Note that at the position of the conduit 27, the chips C can be collected even more smoothly by raising the sea }A obliquely and feeding it.

The sheet A with the grooves B formed in this way is sequentially sent to the rear, and in the next step, the outer material D made of synthetic resin, leather, etc. is polymerized on the upper surface, and the lining material E is polymerized on the lower surface. Thereafter, both end portions and the groove portions are sewn together using an industrial sewing machine, and then cut to a predetermined size and used as the outer skin of an automobile seat (see FIG. 6).

In addition to the above, the bottom cutting blade 12 may be of a clipper type consisting of an upper blade and a lower blade with sawtooth-shaped blades, and in this case as well, the bottom face of the groove can be cut in the same way as described above.

Further, in the above case, when cutting while supplying a small amount of water in the form of a spray to the vertical cutting blade 2 and the bottom cutting blade 12, the sharpness of the blade becomes even better, and the cutting action can be performed smoothly.

As the elastic sheet, in addition to the above-mentioned foamed urethane sheet, sheets made of natural or synthetic rubber or the like having the same properties can be used in the same manner as described above.

As described above, according to the present invention, a vertical cutting blade for forming both side walls of the groove and a bottom cutting blade for forming the bottom surface of the groove are provided above the base, and the elastic sheet that feeds the upper surface of the base is On the other hand, since the grooves are formed continuously, the chips become string-like in the cross-sectional shape of the grooves, and almost no powder or fine particles come out.

Therefore, it is extremely easy to collect chips and no chips remain on the surface of the sheet, so the commercial value of products using this type of sheet can be significantly increased.

Moreover, between the vertical cutting blade and the bottom cutting blade, a rotating body for guiding the sheet in the feeding direction and a pressing piece for pressing the part between both side walls of the groove immediately before the bottom cutting blade are provided, so when forming the groove. It prevents the feed sheet from shifting sideways or jumping up, and the bottom cutting blade can reliably cut between the cuts in the vertically cut sheet, and the depth of the grooves can also be kept constant. Despite the flexible structure of the material,
Grooves can be formed more smoothly in this type of sheet.

In addition, suction conduits for collecting chips from the grooves were installed separately for each groove position, so the string-like chips generated by the grooves could become entangled with each other or be attracted to each other due to the action of static electricity. , the collection of chips is not obstructed at all.

Therefore, the chips from each groove can be collected more smoothly, and it becomes extremely easy to form a plurality of grooves at the same time.

Therefore, according to the present invention, grooves can be easily and efficiently formed in an elastic sheet, and products using this type of sheet can be improved in quality and provided at extremely low cost.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the main parts showing one embodiment of the device of the present invention, Fig. 2 is an enlarged plan view of a part of the previous figure, Fig. 3 is a sectional view taken along line ■-i in the previous figure, and Fig. Figures 4 and 5 are from Figure 3 V-V.
6 is a partial perspective view showing an example of a product manufactured using a grooved sheet according to the present invention.

Claims (1)

[Scope of Claims] 1. A base whose upper surface serves as an elastic sheet feeding surface is installed, and above the base there are vertical cutting blades for forming both side walls of a groove for the elastic sheet to be fed; A groove forming device for an elastic sheet, characterized in that it is provided with a bottom cutting blade for forming the bottom surface of the groove. 2. Install a base whose upper surface serves as an elastic sheet feeding surface, and form above the base a vertical cutting blade for forming both side walls of a groove for the elastic sheet to be fed, and a bottom surface of the groove. Between the vertical cutting blade and the bottom cutting blade above the base, there is a rotating body for guiding the elastic sheet in the feeding direction, and a part between both side walls of the groove just before the bottom cutting blade is pressed. 1. A groove forming device for an elastic sheet, characterized in that a suppressing piece is provided for the purpose of forming grooves on an elastic sheet. 3. Install a base whose upper surface serves as the elastic sheet feeding surface, and above the base, install vertical cutting blades in a direction perpendicular to the sheet feeding direction to form both side walls of the groove for the elastic sheet being fed. At the same time, a plurality of vertical cutting blades are provided in parallel at equal intervals, and a bottom cutting blade for forming the bottom surface of the groove is provided corresponding to each vertical cutting blade, and a bottom cutting blade is provided between each vertical cutting blade and the bottom cutting blade above the base. , a rotating body for guiding the elastic sheet in the feeding direction, a pressing piece for pressing the portion between both side walls of the groove immediately before the bottom cutting blade, and a suction conduit for collecting chips from the groove portion. 1. A groove forming device for an elastic sheet, characterized in that: is provided separately for each groove position.