JPH054111A - Cutting device for sheet-metal inserted extrusion-molded article - Google Patents

Abstract

PURPOSE:To provide a cutting device which cuts an extrusion-molded article such as sheet-metal inserted weather strip having a U-shaped section. CONSTITUTION:An upper cutter 14 is arranged in shiftable manner oppositely to a lower cutter 4 fixed on a base board 1, and a supporting board 2 which supports a sheet-metal inserted extrusion-molded article having a U-shaped section at a cutting position on the lower cutter 4 is installed on the basic board 1. The upper cutter 14 is shifted towards the lower cutter 4 by a driving mechanism, and cuts the sheet-metal inserted extrusion-molded article. A middle cutter 6 having a shape which permits the insertion to the inside of the sheet- metal inserted extrusion molded arricle having the U-shaped section is arranged in advance/retreat-enablde form towards the extrusion-molded article. A cam member 16 for advance/retreat-shifting the middle cutter 6 according to the shift of the upper cutter 14 is arranged, and when the upper cutter 14 shifts toward the lower cutter 4, the middle cutter 6 is advanced to the inside of the extrusion-molded article.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting an extruded product such as a weather strip with a sheet metal insert having a U-shaped cross section.

[0002]

2. Description of the Related Art As a device for cutting extruded products such as weather strips, a lower blade is fixed to the lower part, and an upper blade is arranged above the lower blade so as to be vertically movable by a tool guide. With a structure that lowers with a hydraulic cylinder etc.,
A device is used that lowers the upper blade with respect to the extrusion-molded article placed on the lower blade and cuts it (for example, JP-A-2-3).
No. 04157).

However, when the extruded product is formed only from rubber or synthetic resin, there is no particular problem in cutting the product. For example, a sheet metal insert having a U-shaped cross section is put in the trim portion of the weather strip. In this case, if the upper blade is moved so as to sandwich the weather strip between the upper blade and the lower blade and cutting is performed, the U-shaped cross section of the sheet metal insert is crushed and deformed, and good cutting cannot be performed.

[0004]

Therefore, in the past,
I used to cut a weather strip with sheet metal inserts using a rotary saw, but when I cut this type of weather strip with a rotary saw, fine burrs are generated on the cut end face and fine cuts are made during cutting. There was a problem that the powder was scattered and the work environment was deteriorated.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cutting device capable of satisfactorily cutting an extruded product such as a weather strip with a sheet metal insert having a U-shaped cross section. To do.

[0006]

To this end, in the apparatus for cutting an extrusion-molded product containing a sheet metal insert of the present invention, the upper blade is arranged so as to be movable in opposition to the lower blade fixed on the base.
A support base for supporting the extruded product with a U-shaped cross section with a sheet metal insert at the cutting position on the lower blade is provided on the base, and the upper blade is moved toward the lower blade by a drive mechanism,
In a cutting device for cutting an extruded product with a sheet metal insert, a middle blade having a U-shaped cross section and having a shape that can be inserted inside the extruded product with a sheet metal insert is provided so as to be movable back and forth toward the extruded product. A cam member for moving the inner blade forward and backward with the movement of the upper blade is provided, and when the upper blade moves toward the lower blade, the inner blade enters the inside of the extrusion molded product.

[0007]

When the upper blade moves toward the lower blade at the time of cutting, the middle blade enters the inside of the extrusion-molded product having the U-shaped cross section by the action of the cam member.
Then, the upper blade moves so as to come into contact with the lower blade while the middle blade holds the shape of the extrusion-molded product containing the sheet metal insert from the inside, and the extrusion-molded product is cut. Therefore, the sheet metal insert is not crushed, and the extruded product having the U-shaped cross section can be cut without being deformed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a front view of a cutting device, which has a U-shaped cross section sheet metal insert 20a in the trim portion.
The weather strip 20 (FIG. 3) having the upper blade 14,
It is configured to cut in the transverse direction by using the middle blade 6 and the lower blade 4.

That is, in this cutting device, a support base 2 of a weather strip 20 is fixed at a substantially center of a base 1, and guide shafts 3 are vertically provided on both sides of the support base 2. The lower blade 4 is fixed upward on the front side of the support base 2, and the middle blade holder 5 is provided on the base 1. As shown in FIG. 1, the shape of the lower blade 4 is formed along the side portion of the trim portion of the weather strip 20 so that the blade portion rises in a curved line. Further, the blade portion of the lower blade 4 projects slightly above the upper surface of the support base 2 so that the cutting edge of the sheet metal insert 20a of the weather strip 20 does not sag (does not curve and deform downward) during cutting.

The middle blade holder 5 is arranged from the right side to the upper side of the support base 2 in the front view, and the middle blade holder 5 is provided.
A middle blade 6 is arranged on the upper part of the so as to be slidable in the horizontal direction. This middle blade 6 is formed so that it can be inserted into the U-shaped cross-section portion of the weather strip 20 shown in FIG. 3, and the blade portion of the middle blade 6 has an upper edge on the front side as shown in FIG. It is provided along the section. A roller 6a that engages with a cam groove 15 of a cam member 16, which will be described later, is horizontally supported at the opening at the rear end of the middle blade 6 (on the right side in the front view).

As shown in FIG. 2, after the support base 2 on the base 1, a movable support base 7 for supporting the weather strip 20 behind the cutting portion is arranged via a rod 8 so as to be vertically movable. Is set up. That is, the rod 8 is erected upright through the base 1, the coil spring 9 is fitted around the rod 8, and the movable support base 7 is biased upward by the coil spring 9 and stands still at a fixed position. The height at which the movable support base 7 stands still and supports the weather strip 20 is set to be slightly higher than the upper position of the support base 2 that supports the weather strip 20 at the cutting portion.

A movable plate 10 is horizontally arranged above the base 1, two guide shafts 3, 3 are fitted and inserted into thrust bearing portions of the movable plate 10, and the movable plate 10 has a guide shaft 3, It can be moved up and down along 3. Further, the coil springs 11 and 11 are fitted onto the outer circumferences of the guide shafts 3 and 3, and the movable plate 10 is biased upward by the coil springs 11 and 11 and stands still at its upper end position.

The fluid pressure cylinder 12 is fixed downward to a fixing portion (not shown), the movable plate 10 is connected to the tip of the piston rod of the fluid pressure cylinder 12, and the fluid pressure cylinder 12 is pushed out to cause the fluid pressure cylinder 12 to move from FIG. Move down to position 9.

An upper blade holder 13 is fixed to the lower center of the movable plate 10, and an upper blade 14 is provided on the front side of the upper blade holder 13.
Is attached so as to face the lower blade 4 described above. Guide portions extend downward on both sides of the upper blade 14.

Further, a cam member 16 is fixed to the lower portion of the movable plate 10 on the right side of the upper blade holder 13, and a cam groove 15 is formed in the cam member 16, and the cam groove 15 is formed.
The roller 6a of the above-mentioned middle blade 6 is engaged with (FIGS. 1 and 4). The cam groove 15 is formed by bending the upper part to the left side in FIG. 1 in the vertical direction so that the middle blade 6 is moved to the left side in FIG. 1, that is, inside the weather strip 20 when the movable plate 10 is lowered. To be done.

On the lower rear side of the movable plate 10, a movable support base 7 is provided.
A pressing member 18 for pressing the upper weather strip 20 is provided via the rod 17. The rod 17 is inserted through a hole of the movable plate 10 so as to be vertically movable, and a coil spring 19 is fitted on the outer circumference of the rod 17. When the movable plate 10 descends, the pressing member 18 presses the weather strip 20 together with the spring force of the coil spring 19.

Next, the operation of the cutting device having the above construction will be described.

When the cutting device is in the state shown in FIGS. 1 and 2, that is, in the state where the movable plate 10 is located above, the weather strip 20 of the object to be cut passes on the movable support base 7 from the rear of FIG. Is inserted on the support base 2 of the cutting device, and the cutting position is aligned with the line connecting the upper blade 14 and the lower blade 4 (FIG. 5).
At this time, since the weather strip 20 supported on the movable support base 7 is located slightly above the support base 2 and the lower blade 4 of the cutting portion, and the middle blade 6 is also pulled back, the weather strip 20 The interference between the blade 20 and each blade is avoided, and the weather strip 20 is prevented from being scratched when the weather strip 20 is inserted.

Next, the fluid pressure cylinder 12 pushes out the piston rod to move the movable plate 10 downward. As the movable plate 10 descends, the pressing member 18 descends to press the weather strip 20 on the movable support base 7, and the pressing member 18 presses the weather strip 20 to move the movable support 10 as shown in FIG. The table 7 is lowered, and the front of the weather strip 20 is placed on the support table 2.

When the movable plate 10 is further lowered,
The inner blade 6 slides in the inner blade holder 5 by the action of the cam member 16, and the tip portion of the inner blade 6 trims the weather strip 20 on the support base 2 (having a sheet metal insert 20a U).
(Fig. 7). At this time, the middle blade 6
Contacts the upper part of the weather strip 20 in the trim section,
The upper part is supported (FIGS. 7 and 8).

When the movable plate 10 is further lowered,
With the pressing member 18 pressing the weather strip and the middle blade 6 entering the trim portion, the upper blade 14 is lowered to the positions shown in FIGS. 9 and 10, and the operation of the upper blade 14, the middle blade 6, and the lower blade 4 is performed. Thus, the weather strip 20 is cut. Thereafter, when the fluid pressure cylinder 12 is pulled back and the movable plate 10 rises, the upper blade 14 rises and the middle blade 6 retreats from the inside of the weather strip 20, and the pressing member 18 separates from the weather strip 20. , The state of FIG. 1 and FIG. 2 is restored.

In this way, when the upper blade 14 descends and the weather strip 20 is sandwiched between the weather strip 20 and the lower blade 4, the middle blade 6 is cut.
Enters the trim portion of the weather strip 20 and maintains the shape of that portion, so that the trim portion having the U-shaped cross section containing the sheet metal insert 20a is not crushed and deformed,
It cuts well. Further, as shown in FIG. 8, since the blade portion of the lower blade 4 slightly protrudes from the upper surface of the support base 2, during cutting, the blade portion is cut from the beginning of the sheet metal insert 20.
Upon hitting a, the cutting edge of the sheet metal insert is prevented from sagging due to cutting.

Since such a cutting device automatically holds and cuts the weather strip, for example, in a weather strip extrusion production line, a movable table which intermittently reciprocates at the same speed as the weather strip. If this is installed, the present apparatus can be installed and used in the extrusion production line.

[0025]

As described above, according to the apparatus for cutting an extruded product with a sheet metal insert of the present invention, a middle blade having a shape insertable inside the extruded product with a sheet metal insert having a U-shaped cross section is provided. , A cam member that is arranged so as to be able to move forward and backward toward the extrusion-molded product and that moves the middle blade forward and backward with the movement of the upper blade, and when the upper blade moves toward the lower blade, Since it is configured to enter the inside of the extrusion molded product, the upper blade moves toward the lower blade during cutting, and the middle blade has a U-shaped cross section when cutting the extrusion molded product on the lower blade. The sheet metal insert does not crush and can be satisfactorily cut without deforming the extrusion-molded product, because the sheet-metal insert does not crush and enters the inside of the extrusion-molded product so as to maintain its shape. In addition, since the middle blade automatically moves back and forth with the movement of the upper blade by the action of the cam member, the cutting can be automated and the work can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a front view of a cutting device showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a perspective view of a weather strip of an extrusion molded product.

FIG. 4 is an enlarged cross-sectional view near the middle blade.

FIG. 5 is a partial front view at the time of cutting.

FIG. 6 is a partial front view at the time of cutting.

FIG. 7 is a partial front view at the time of cutting.

FIG. 8 is an enlarged cross-sectional view of a cutting position during cutting.

FIG. 9 is a front view of the cutting device when the cutting is completed.

10 is a sectional view taken along line IX-IX in FIG.

[Explanation of symbols]

1-base, 2-support, 4-lower blade, 6-middle blade, 14-upper blade, 16-cam member.

Claims (1)

Claim: What is claimed is: 1. An extrusion-molded product having a U-shaped cross section and having a U-shaped cross section, in which the upper blade is movably disposed so as to face the lower blade fixed on the base. In the cutting device for supporting the cutting position, the supporting table is provided on the base table, and the upper blade is moved toward the lower blade by a driving mechanism to cut the sheet metal insert-containing extruded product. A middle blade having a shape that can be inserted inside the extrusion-molded product with a sheet metal insert having a cross section is disposed so as to be movable back and forth toward the extrusion-molded product, and the middle blade is moved forward and backward with the movement of the upper blade. A device for cutting an extruded product containing a sheet metal insert, which is provided with a cam member for causing the upper blade to move inside the extruded product when the upper blade moves toward the lower blade.