JPH0343190A - Cutting device - Google Patents

Abstract

PURPOSE:To obtain a device capable of cutting in a short time at a low cost with a high accuracy and good flatness, by providing a cutting blade whose edge tip is inclined for the advancing and retreating directions, a holding means feeding the body to be cut during the moving route of the cutting blade and a pressing means pressing a cutting body to the holding means. CONSTITUTION:A cutting blade 19 fitted to a cutting blade holder 16 is descended to the side of a gasket holder 20 by an air cylinder 15 for driving the cutting blade holder, the inclined edge tip of the cutting blade 19 is gradually pressed from the lower end side to a gasket 22 which is pressed to a gasket presser 24 held on the gasket holder 20 and the root part against the inclined face 23 of the gasket 22 is obliquely cut for the longitudinal direction of the gasket 22. Due to the edge tip of the cutting blade 19 being obliquely set for the moving direction of the cutting blade 19 and the edge tip of the cutting blade 19 being abutted gradually on the gasket 22, the cutting force is small and the elastic deformation at the cutting time of the gasket 22 is less, so the gasket 22 can be cut with good flatness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a cutting device for cutting, for example, a refrigerator gasket after extrusion molding.

(Prior Art) For example, some refrigerators include a gasket that seals between a refrigerator body and a door. That is, the gasket is made by extruding soft vinyl chloride or the like into a tube shape.

The gasket 1 has a complex irregular hollow cross section as shown in FIG. 5, and is formed thin and has flexibility.

Furthermore, after extrusion, the gaskets are cut into oblique shapes (for example, 45") with respect to their longitudinal direction.Then, the gaskets are cut with their cut surfaces abutted against each other, as shown in Figure 4. The gaskets are joined in a rectangular frame shape so as to roughly match the shape of the refrigerator door or opening.Here, to join the gaskets, press the cross section of the gasket against the heating plate. A method of heat welding by direct heating after improving the flatness of the material is adopted.

In addition, as shown in FIG. 6, the device for cutting the gasket after extrusion includes a tool 2 having a knife.
There is a type in which the gasket is pressed against the gasket, and a type in which a circular cutter such as a metal saw with saw teeth is brought into contact with the gasket (not shown). Furthermore, in addition to this, there are also devices that cut the gasket 1 using a water jet.

(Problems to be Solved by the Invention) By the way, the flatter the cut surface of gaskets, the easier they can be joined. However, as mentioned above, the type of device that cuts the gasket by using the tool 2 with a knife cuts the flexible gasket 1 in a pressed and crushed state, resulting in poor flatness and one cut surface. For example, variations in flatness of 3 cm or more may occur. Furthermore, as shown in FIG. 6, after cutting the gasket 1, the knife is brought into contact with the abutment plate 3 on which the gasket 1 is placed, so that the life of the tool 2 is shortened.

On the other hand, a circular cutter with serrations is used to cut the gasket.
・The cutting speed of this type of device is slow. In other words,
If the gasket 1 is cut while being extruded, it is possible to reduce the number of man-hours and cost, but since the cutting speed is slow, it is difficult to cut the gasket 1 while being extruded. For this reason, in this type of device, the gasket 1 is cut into a predetermined length by the above-mentioned device and then processed using the circular cutter, and cutting the gasket 1 takes a lot of time. Additionally, this type of device has disadvantages, such as the production of chips during cutting.

In addition, devices that use water jets are
Although cutting with good flatness can be achieved in a short period of time, there is a problem in that running costs and initial costs are high.

Furthermore, if the gasket 1 is joined with poor flatness of the cut surface, discoloration may occur at the joined portion.

Furthermore, when the cut surface of the gasket 1 is pressed against the heating plate to improve its flatness, so-called slag of the gasket 1 may adhere to the heating plate, so conventionally, it has been necessary to remove this sludge.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus that can cut an object with good flatness and precision, at low cost, and in a short time.

[Structure of the Invention] (Means and operations for solving alli) In order to achieve the above object, the present invention includes a driving means, a blade that moves forward and backward by being driven by the driving means, and a cutting edge of the blade that moves forward and backward in the forward and backward directions. It was equipped with an inclined cutting blade and a holding means for holding the object to be cut and supplying the object to be cut into the advancing and retreating path of the cutting blade.

Further, the holding means is provided with a pressing means that has a pressing surface that follows the shape of at least a part of the outer side of the object to be cut and presses the object to be cut.

By doing so, the present invention improves the flatness of the cross section of the object to be cut and increases precision, and also shortens the time required for cutting without increasing costs.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

FIG. 1 shows an embodiment of a cutting device according to the present invention. What is indicated by 11 in FIG. 1 is the main body.

The main body 11 has a flat support part 13 having supporting legs 12 hanging down on the back side thereof, and a frame 14 hanging down on the front side of the support part 13.

Further, an air cylinder 15 as a driving means is provided on a frame 14 projecting from the main body 11. This air cylinder 15 drives a cutting blade holder indicated by 16 in the figure, and is supported by the main body 11. Further, the air cylinder 15 has a piston 17 that can move forward and backward substantially along the axis of the air cylinder 15 and can be projected and retracted.

Further, the air cylinder 15 is fixed to the upper end of the frame 14. Furthermore, the air cylinder 15 has the piston 1
7 is coupled to the cutting blade holder 16. Then, the air cylinder 15 causes the piston 17 to protrude and lowers the cutting blade holder 16 toward the support portion 13 as shown by arrow A in the figure. Also, air cylinder 1
5, the piston 17 is retracted and the cutting blade holder 16 is raised as shown by arrow B in the figure.

Here, 18.18 in FIG. 1 is a guide member that is provided along the side edge of the cutting force holder 16 and integrally with the frame 14 to guide the moving cutting blade holder 16. .

Further, a cutting blade 19 is provided at the tip of the cutting blade holder 16. The cutting blade 19 is in the shape of a parallelogram plate with a knife edge.

The cutting blade 19 is attached to the cutting blade holder 16 with a cutting edge 19a formed at an edge along the longitudinal direction thereof facing toward the support portion 13. The cutting blade 19 has its cutting edge 19a facing the front plate surface of the support portion 13.

Furthermore, the cutting blade 19 has its cutting edge 19a inclined with respect to the moving direction of the cutting blade holder 16.

One longitudinal end of the cutting blade 19 is located on the air cylinder 15 side, and the other end is located on the support section 13.
It is located on the side of Further, the cutting blade 19 has an inclination angle α set to 45''.
moves up and down together with the cutting blade holder 16, and advances and retreats in the directions indicated by arrows A and B in the figure.

Further, 20 in the figure indicates a gasket holder as a holding means. This gasket holder 20 is arranged on the front plate surface of the support section 13. Further, as shown in FIGS. 2 and 3, the gasket holder 20 has a retaining groove 21 that extends substantially horizontally to the front plate surface and whose depth direction is substantially orthogonal to the front plate surface. There is. and,
In the gasket holder 20, the shape of the side wall and bottom of the holding groove 21 is set to approximately match the outer shape of a refrigerator gasket (hereinafter referred to as a gasket) 22 as an object to be cut, which will be described later, for example.

Furthermore, as shown in FIGS. 2 and 3, the gasket holder 20 has an inclined surface 23 that is inclined with respect to the direction in which the gasket 22 extends.

Then, the gasket holder 20 introduces the gasket 22 into the holding groove 21 and allows it to pass through the holding groove 21. The gasket holder 20 then holds the gasket 22 in the holding groove 2.
1 and is held in place. Furthermore, the gasket holder 20 has the tip of the gasket 22 protruding from the inclined surface 23, and the gasket 22 is led out into the middle of the ascending and descending path of the cutting blade 19.

The gasket holder 20 has an inclined surface 23 along the vertical direction of the cutting blade 19, and when the lowered cutting blade 19 and the gasket holder 20 face each other, the plate surface 19a of the cutting blade 19 and the inclined surface 23 are aligned. are arranged so that they are substantially parallel to each other with a clearance between them. Here, the clearance between the plate surface 19b of the cutting blade 19 and the inclined surface 23 is, for example, 10
It is set to 0 μm.

Here, the gasket 22 is formed by extruding soft vinyl chloride or the like into a tube shape. As shown in FIG. 3, the gasket 22 has a hollow cross section with a complex irregular shape, and is thinly formed to have elasticity and flexibility.

The gasket 22 is supplied from an extrusion molding machine (not shown) in a state substantially parallel to the front plate surface of the support section 13, and reaches the holding groove 21 of the gasket holder 20. Further, the gasket 22 protrudes from the inclined surface 23 while being supported in a cantilever manner by the gasket holder 20. The gasket 22 is supplied toward the gasket holder 20 from the front side in FIG.

Furthermore, 24 in each figure is a gasket presser as a presser means. The gasket retainer 24 has a retainer surface 25 having a shape that substantially matches the shape of a portion of the outer side of the gasket 22, and constitutes one side surface of the retaining groove 21. Further, the gasket retainer 24 is capable of sliding along a sliding surface 26 of the gasket holder 20 shown in FIG. And gasket presser 2
4 slides in the width direction of the gasket 22 to move toward and away from the gasket 22.

Then, the gasket presser 24 is attached to the gasket holder 20
The gasket 22 is pressed against the inner surface of the holding groove 21 by pressing the gasket 22 . Here, the gasket presser 24 is connected to an air cylinder 27 for driving the gasket presser disposed on the front side of the support section 13 as shown in FIG.
Driven by. Furthermore, the pressing force of the gasket holder 24 against the gasket 22 is set to a value that does not crush the gasket 22 excessively and cause it to undergo elastic deformation, and allows the gasket 22 to move while sliding inside the holding groove 21, for example. .

In the device configured as described above, the cutting blade 19 attached to the cutting blade holder 16 is lowered toward the gasket holder 20 by the air cylinder 15 for driving the cutting blade holder. Then, the inclined cutting edge of the cutting blade 19 is gradually pressed from its lower end side against the gasket 22 held by the gasket holder 20 and pressed by the gasket presser 24.

Then, a portion of the gasket 22 at the base relative to the inclined surface 23 is cut obliquely with respect to the longitudinal direction of the gasket 22.

That is, in such a device, the cutting edge of the cutting blade 19 is set obliquely with respect to the moving direction of the cutting blade 19, and the cutting force of the cutting blade 19 is small because the cutting edge gradually hits the gasket 22. In addition, the amount of elastic deformation of the gasket 22 during cutting is small. Therefore, the gasket 22 can be cut with good flatness. In addition, the flatness of the gasket 22 cut by the above-mentioned apparatus was improved to 173.

Further, since the gasket 22 is passed through the holding groove 21 whose inner surface shape substantially matches the outer shape of the gasket 22, a pressing force is uniformly applied to the gasket 22 as a whole.

Therefore, there is no possibility that the gasket 22 held by the gas cap/socket holder 20 will be deformed.

Since the flatness can be improved, the gasket 22
It is no longer necessary to press the gaskets 22 against a heating plate, thereby making it possible to heat and join the plurality of gaskets 22 in a non-contact manner. Furthermore, the bonding strength of the gasket bonded after cutting was increased. That is, from these things,
It is thought that damage to gasket joints can be significantly reduced.

Further, since the above-described device cuts the gas cartridge 22 supported in a cantilever on the gasket holder 20 without using an abutting plate, the cutting blade 19 does not come into contact with anything other than the gas cartridge 22. Therefore, the life of the cutting blade 19 is long.

Further, if a general cutting blade is attached to the cutting blade holder 16 in an inclined state, a commercially available cutting blade can be used as one cutting blade. By doing so, there is no need to manufacture a dedicated cutting blade. Further, if a mounting structure for the cutting blade 19 that allows easy attachment and detachment of the cutting blade 19 is adopted, the cutting blade 19 can be easily replaced.

Further, the above-mentioned cutting device has lower initial cost and running cost than conventional ones that utilize water jets. Furthermore, since the cutting speed can be set faster than when using a circular cutter with serrations, it is possible to cut the gasket 22 along the line of the extruded bottom shape of the gasket 22.

Note that the cutting blade 19 is moved in the moving direction A of the cutting blade holder 16,
If the gasket 22 is cut while being vibrated at B, the flatness can be further improved.

Further, in this embodiment, the gasket 22 is supplied to the gasket holder 20 in a state parallel to the front plate surface of the support part 13,
Although the cutting blade 19 is moved diagonally with respect to the front plate surface of the support part 13, the present invention is not limited to this. For example, the gasket 22 is moved diagonally with respect to the front plate surface of the support part 13. Alternatively, the cutting blade 19 may be moved perpendicularly to the front plate surface of the support 13.

Further, in this embodiment, the cutting blade 19 is inclined low from the left side to the right side when viewed from the front side in the supply direction of the gasket 22, as shown in FIG. 1, but the present invention is not limited to this. Instead, the cutting blade 19 may be inclined low from the right side to the left side when viewed from the front side in the supply direction of the gasket 22, for example.

Furthermore, in this example, the value of the inclination angle α of one cutting blade is set to 4.
Although the inclination angle α is set to 5", the value of the inclination angle α may be set to a value other than this. Note that the smaller the inclination angle α is set (for example, 25"), the smaller the cutting force will be. can do.

[Effects of the Invention] As explained above, the present invention provides a cutting blade that is driven by a driving means to move forward and backward, and whose cutting edge is inclined with respect to the forward and backward direction, and a cutting blade that is supplied into the forward and backward path of the cutting blade by a holding means. The object to be cut can now be cut.

Further, a holding means 1 is provided, which has a holding surface shaped to follow the shape of at least a part of the outer side of the object to be cut, and presses the object to be cut.

Therefore, the present invention has the effect of improving the flatness of the cut surface of the object to be cut, increasing precision, and shortening the time required for cutting without increasing the cost.

[Brief explanation of drawings]

1 to 3 are front views showing a cutting blade and a gasket holder showing one embodiment of the present invention, and FIGS. 4 to 7 show a conventional example, and FIG. 5 is a front view showing the cut surface of the gasket, FIG. 6 is a front view showing the cutting blade and the gasket, and FIG. 7 is a side view showing the tip of the gasket. It is. 15...Air cylinder for driving the cutting blade holder (driving means), 1...Cutting blade, 20...Gasket holder (
holding means) 24...gasket presser (holding means),
25... Presser surface.

Claims (2)

[Claims] (1) A driving means, a cutting blade which is driven by the driving means to advance and retreat and whose cutting edge is inclined with respect to the advancing and retreating direction, and a cutting blade which holds an object to be cut and which is placed in the advancing and retreating path of the cutting blade. and a holding means for supplying a cutting device. (2) Claim (2) characterized in that the holding means is provided with a pressing means that presses the object to be cut and has a pressing surface that follows the shape of at least a part of the outer side of the object to be cut. 1
) cutting device as described.