JP2006116625A - Cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting device, cutting a work without causing insufficient cutting or excessive cutting. <P>SOLUTION: This cutting device is provided with a support 11 for supporting a plate-like work 21 and with a cutting blade 13 for cutting the work 21 on the support 11 by shearing. Further, the cutting device is provided with a work presser 14 for pressing the work 21 onto the support 11 prior to the cutting operation of the cutting blade 13. An angled part 15 is formed on a part of the support 11 corresponding to the knife edge 13a of the cutting blade 13. The apex of the angled part 15 is provided with a clearance groove 16 for releasing the knife edge 13a of the cutting blade 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  In the present invention, for example, in a workpiece formed by polymerizing a skin material on a base material such as a molded ceiling board of a vehicle such as an automobile, the base material is cut and removed over a predetermined width along its edge, etc. The present invention relates to a cutting device used for the above.

  In a vehicle such as an automobile, when the front and rear length is long, the molded ceiling plate to be mounted on the ceiling in the passenger compartment is molded in a state of being divided into two in the front and rear, and the opposite ends thereof are end-face treated And connected in the front-rear direction. As shown in FIG. 3, the molded ceiling board 21 is molded into a predetermined shape in a state in which a skin material 23 made of a resin sheet such as polyester is polymerized on a plate-like base material 22 such as urethane. Then, as shown in FIGS. 4A and 4B, the edge of the base material 22 of the molded ceiling board 21 is cut and removed over a predetermined width to form a protrusion 23 a at the end of the skin material 23. . Thereafter, as shown in FIG. 4C, the protruding portion 23 a of the skin material 23 is folded back so that the end surface of the base material 22 is contained, and is adhered and fixed to the base material 22 with an adhesive.

  When the base material 22 is cut, the cutting blade is cut toward the support base while the molded ceiling plate 21 is supported on the support base so that the skin material 23 is on the lower side. 22 was cut by shearing. For this reason, there existed a problem that it was difficult to set the cutting pressure appropriately at the time of cutting operation of a cutting blade.

  That is, when the cutting pressure is weak, the base material 22 is not reliably cut, leaving uncut portions on the cut end surface of the base material 22, and then the protrusion 23 a of the skin material 23 is folded back to the base material 22 side. As a result, irregularities are formed on the folded end portion, and it cannot be finished in a straight line. Therefore, in order not to cause such an inconvenience, it may be necessary to remove the uncut residue manually after cutting with the cutting blade, which is extremely troublesome. On the other hand, when the cutting pressure is strong, not only the base material 22 but also part or all of the skin material 23 is cut. When a part is cut | disconnected, when the protrusion part 23a of the skin material 23 is turned back, the base material 22 will be partially exposed to the turned-back edge part, and commercial value will be impaired. Of course, if the entire substrate is cut, the inclusion of the base material 22 becomes impossible.

  In particular, as shown in FIG. 3, in the case where the molded ceiling plate 21 is composed of a central top plate portion 21a and side plate portions 21b extending downwardly from both sides thereof, the top plate portion 21a and both side plates When the base plate 22a and the base plate 22 of the both side plate portions 21b are simultaneously cut from above the top plate portion 21a by a cutting blade having a concave cutting edge corresponding to the plate portion 21b, the above-mentioned problem appears remarkably. . That is, in the side plate portion 21b, when the cutting blade descends from above, a tearing action is added in addition to a shearing action, so that the skin material 23 is often cut.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a cutting apparatus capable of appropriately cutting a plate-shaped workpiece without leaving uncut or excessive cutting under an appropriate cutting pressure.

  In order to achieve the above object, the invention according to claim 1 includes a support base for supporting a plate-shaped workpiece, a cutting blade for performing a cutting process by shearing on the workpiece on the support base, In a cutting device provided with a work presser that presses a work onto a support base prior to the cutting operation by the cutting blade, the support base is formed with a mountain-shaped portion at a portion corresponding to the cutting edge of the cutting blade, and A relief groove for escaping the cutting edge of the cutting blade is formed at the top of the mountain-shaped portion.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the work presser presses the work at a skirt part of the mountain-like part or a part corresponding to the outside thereof.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the support base receives a top plate receiving portion for receiving the top plate portion of the workpiece and an inclined side plate portion of the workpiece. The side plate receiving portion of the support base is lower than the portion of the top plate receiving portion.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the support base receives a top plate receiving portion for receiving the top plate portion of the workpiece and an inclined side plate portion of the workpiece. And the escape groove is formed such that the side plate receiving portion of the support base is shallower than the top plate receiving portion.

(Function)
In invention of Claim 1, when a workpiece | work is supported on a support stand and it presses with a workpiece presser, the cutting part of the workpiece | work corresponding to the blade edge of a cutting blade will be lifted by the mountain-shaped part on a support stand, and will be in a tension state. Retained. Therefore, when the cutting blade is cut toward the support base in this state, the workpiece substrate can be appropriately cut. Further, at the time of the cutting operation of the cutting blade, the cutting edge of the cutting blade enters the escape groove formed at the top of the mountain-shaped portion, and interference with the support base is avoided. Then, the skin material of the workpiece escapes into the escape groove together with the cutting edge of the cutting blade, thereby avoiding cutting.

  In the invention according to claim 2, since the work is pressed by the work presser at the skirt part of the mountain-shaped part or the part corresponding to the outside thereof, the cut part of the work can be effectively pressed against the mountain-shaped part. And can be held securely in tension.

  In the invention according to claim 3, since the height of the mountain-shaped portion is lower in the portion of the side plate receiving portion of the support base than the corresponding portion of the top plate receiving portion, it acts on the side plate portion of the molded ceiling plate. Even if the tension force to be weakened and the cutting is applied by the cutting blade, the skin material is not cut.

  In the invention according to claim 4, since the depth of the escape groove is shallower in the portion of the side plate receiving portion of the support base than in the portion of the top plate receiving portion, the side plate portion is not cut when being cut by the cutting blade. Even if it acts, since the tension does not act so much on the skin material, the skin material is not cut.

  As described above, according to the present invention, the base material of the workpiece can be appropriately cut without being left uncut or excessively cut while leaving the skin material.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. In addition, in this embodiment, about the shaping | molding ceiling board as a workpiece | work, and its related structure, the code | symbol same as the structure code | symbol shown in FIG.3 and FIG.4 is referred, and those detailed description is abbreviate | omitted.

  As shown in FIG. 1, this cutting apparatus is equipped with a support base 11 for supporting a molded ceiling board 21 as a work formed by superposing a skin material 23 on a base material 22. The support 11 includes a top plate receiving portion 11 a for receiving the top plate portion 21 a of the molded ceiling plate 21 and a side plate receiving portion 11 b for receiving the inclined side plate portion 21 b of the formed ceiling plate 21. . A plurality of positioning projections 12 project from the upper surface of the end of the top plate receiving portion 11 a of the support base 11, and a plurality of positioning holes 24 formed at the end of the molded ceiling plate 21 are engaged with these positioning projections 12. By doing so, the molded ceiling board 21 is positioned at a predetermined position on the support base 11. Normally, the molded ceiling board 21 is formed of a laminated board whose base material 22 is mainly composed of a relatively rigid synthetic resin, and the skin material 23 is formed of a thin fabric material.

  As shown in FIGS. 1 and 2, a cutting blade 13 is disposed above and below one end of the support base 11 so as to be movable up and down, and a top plate portion 21a and both side plates of a molded ceiling plate 21 are disposed at the lower end of the cutting blade 13. A concave cutting edge 13a corresponding to the overall shape of the portion 21b is formed. When the cutting blade 13 is moved downward from the upper retracted position to the lower cutting position in a state where the molded ceiling plate 21 is supported on the support base 11 so that the skin material 23 is on the lower side, the cutting edge 13a. Thus, the edge of the base material 22 of the molded ceiling board 21 is cut to a predetermined width by shearing.

  A pair of work retainers 14 are disposed above the support base 11 so as to be movable up and down so as to be positioned on both sides of the cutting blade 13, and the top plate portion 21 a of the molded ceiling plate 21 is disposed at the lower ends of the work retainers 14. And as a whole, the concave pressing part 14a corresponding to the both side plate parts 21b is formed. Prior to the cutting operation by the cutting blade 13, when these work pressers 14 are moved down from the upper standby position to the lower press position, the formed ceiling plate corresponding to the cutting edge 13a of the cutting blade 13 by the press portion 14a. Both sides of the cut portion 21 are pressed onto the support 11.

  As shown in FIGS. 1 and 2, the support 11 is formed with a mountain-shaped portion 15 at a portion corresponding to the cutting edge 13 a of the cutting blade 13. The work holders 14 hold the formed ceiling board 21 at the skirts on both sides of the mountain-shaped part 15 or at portions corresponding to the outside thereof. A relief groove 16 having a substantially V-shaped cross section for allowing the cutting edge 13 a of the cutting blade 13 to escape is formed at the top of the mountain-shaped portion 15. The height H2 of the mountain-shaped portion 15 is formed to be lower in the side plate receiving portion 11b portion of the support base 11 than in the top plate receiving portion 11a portion. Further, the groove depth H1 of the relief groove 16 is formed so as to be shallower in the side plate receiving portion 11b portion of the support base 11 than in the top plate receiving portion 11a portion.

  Incidentally, in this embodiment, the groove depth H1 of the escape groove 16 is set within a range of 1 to 3 mm, and the groove width L1 is set within a range of 1 to 3 mm. Further, the height H2 of the mountain-shaped portion 15 is set in a range of 1 to 3 mm, and the width L2 of the skirt portion is set in a range of 10 to 20 mm.

Next, the operation of the cutting apparatus configured as described above will be described.
Now, in the stop state of this cutting device, the cutting blade 13 is disposed at the upper retracted position, and both work pressers 14 are disposed at the upper standby position. In this state, the molded ceiling board 21 as a work is supported on the support base 11 and positioned at a predetermined position by the engagement between the positioning hole 24 and the positioning projection 12. Thereafter, when the cutting device is activated, as shown in FIG. 2, both work pressers 14 are moved downward from the upper standby position to the lower presser position. As a result, the cutting position of the formed ceiling plate 21 corresponding to the cutting edge 13 a of the cutting blade 13 is pressed against the support base 11 in the vicinity of the skirt portions on both sides of the mountain-shaped portion 15. As a result, the base material 22 in the cut portion of the molded ceiling board 21 is lifted by the mountain-shaped portion 15 on the support base 11 and held in a tension state.

  Thereafter, the cutting blade 13 is moved downward from the upper retracted position to the lower cutting position, and the base material 22 of the molded ceiling board 21 is cut by shearing by the blade edge 13a, and as shown in FIG. A protrusion 23 a is formed on the material 23. In this case, since the cutting position of the base material 22 of the molded ceiling board 21 is maintained in a tensioned state, the base material 22 is easily cut by shearing. Then, the cutting edge 13a of the cutting blade 13 enters the escape groove 16 formed at the top of the mountain-shaped portion 15, and interference with the support base 11 is avoided. On the other hand, the skin material 23 made of fabric escapes into the escape groove 16 together with the cutting edge 13a of the cutting blade 13 and is not cut. Therefore, it is possible to accurately cut the base material 22 at a predetermined position under an appropriate cutting pressure, so that the cut end surface of the base material 22 is left uncut or the skin material 23 is cut too much. Can be suppressed.

  In particular, in this embodiment, in the portion corresponding to the side plate receiving portion 11 b of the support base 11, the height of the mountain-shaped portion 15 is made lower than that in the portion corresponding to the top plate receiving portion 11 a, and the relief groove 16. The groove depth H1 is formed to be shallow. For this reason, the tension | tensile_strength force which acts on the base material 22 and the skin material 23 of the side-plate part 21b of the shaping | molding ceiling board 21 becomes weak. Accordingly, when the cutting blade 13 cuts the side plate portion 21b, the base 22 is reliably cut, but the skin material 23 is not cut.

  Therefore, the end portion of the base material 22 can be cut without leaving a predetermined width. Therefore, as shown in FIG. 4 (c), when the protruding portion 23a of the skin material 23 is subsequently folded back to the base material 22 side, The folded end can be finished in a straight line, and the substrate 22 can be prevented from being partially exposed to the folded end and becoming defective. In addition, as a configuration for obtaining the above functions, only the mountain-shaped portion 15 and the relief groove 16 are formed, and no dedicated parts are provided, so the number of parts does not increase and the configuration is simple. is there.

Therefore, in the above embodiment, the following effects are exhibited.
-Since the base material 22 can be cut | disconnected without producing a remaining part, leaving the skin material 23 reliably, a beautiful terminal process can be performed as the molded ceiling board 21, and a product value can be raised.

Moreover, since the influence of the cutting by the cutting blade 13 can be reduced, it is possible to effectively prevent the skin material 23 from being cut.
-The number of parts does not increase and the configuration is simple.

-Since the cutting edge 13a of the cutting blade 13 escapes into the escape groove 16 and does not collide strongly with the support base 11, it is possible to suppress the blunting of the cutting edge 13a and extend the life of the cutting blade 13.
(Example of change)
In addition, this embodiment can also be changed and embodied as follows.

-Forming the mountain-shaped part 15 in different shapes, such as convex cross-section arc shape.
The relief groove 16 is formed in a different shape such as a substantially U-shaped cross section or a concave shape with a flat inner bottom surface.

  -The cutting device of the said embodiment is used for the cutting | disconnection of molded articles other than a molding ceiling.

The principal part disassembled perspective view which shows the cutting device of one Embodiment. The partial expanded sectional view of the cutting device of FIG. The perspective view which shows the shaping | molding ceiling board of a vehicle. (A) is the elements on larger scale in 4-4 of FIG. (B) is a fragmentary sectional view which shows the state which cut and removed a part of base material from the state of (a). (C) is a fragmentary sectional view which shows the state which turned up the protrusion part of the skin material from the state of (b).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Support stand, 11a ... Top plate receiving part, 11b ... Side plate receiving part, 13 ... Cutting blade, 13a ... Cutting edge, 14 ... Workpiece clamp, 15 ... Mountain-shaped part, 16 ... Escape groove, 21 ... Molded ceiling as work Plate, 21a ... Top plate part, 21b ... Side plate part, 22 ... Base material, 23 ... Skin material, H1 ... Groove depth.

Claims (4)

A support table for supporting a plate-shaped workpiece, a cutting blade for cutting the workpiece on the support table by shearing, and a workpiece for pressing the workpiece onto the support table prior to the cutting operation by the cutting blade In a cutting device with a presser foot,
A cutting device characterized in that a chevron portion is formed in a portion corresponding to the cutting edge of the cutting blade in the support base, and a relief groove for allowing the cutting edge of the cutting blade to escape is formed at the top of the chevron portion. . The cutting apparatus according to claim 1, wherein the work presser holds the work at a skirt portion of the mountain-shaped portion or a portion corresponding to the outside thereof. The support has a top plate receiving part for receiving the top plate part of the work and a side plate receiving part for receiving the inclined side plate part of the work, and the mountain-like part is a side plate support of the support base. The cutting device according to claim 1 or 2, wherein the portion is lower than the top plate receiving portion. The support base has a top plate receiving part for receiving the top plate part of the work and a side plate receiving part for receiving the inclined side plate part of the work, and the escape groove is a side plate receiving part of the support base. The cutting apparatus according to claim 1, wherein the portion is formed so as to be shallower than the portion of the top plate receiving portion.

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