JP2015054361A - Stripper device and punching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stripper device capable of enhancing reliability of slug collection.SOLUTION: The opening of an upper end in the through-hole of a support substrate is formed to be included in a sheet portion to be punched viewed from above, and a hollow guide part for guiding a generated slug below to a sensor unit is provided to a stripper device. The guide part is configured including the through-hole of the support substrate and extends toward the sensor unit in a vertical direction to a position below the lowermost arrival position of a punching pin.

Description

  The present invention relates to a stripper device that punches a part of a sheet along a cut formed in the sheet and a punching method.

  2. Description of the Related Art A single-wafer punching device for producing a blank as a material for manufacturing a box by punching a sheet into a predetermined shape is known (see, for example, Patent Document 1). In a single wafer punching device, a sheet is cut into a blank (product part) and a blank part by punching the sheet along the cut after forming a cut corresponding to the outer shape of the blank. Then, a box can be obtained by box making a blank.

  By the way, depending on the specifications of the box, it may be required to punch a part of the blank to form a window in the blank. The window is formed, for example, so that the consumer can visually confirm the contents of the box. Such a window portion is generally formed by punching a part of a sheet using a punching pin. For example, a sheet cut with a predetermined pattern is placed on a support substrate in which a through-hole is formed, and then a part of the sheet is pressed along with the punching pin. And a window is formed in the sheet.

JP 2010-179426 A

  In the step of forming the window portion, a part of the sheet is punched to generate a punched residue. If such a scrap is mixed between a plurality of blanks that are products, it may cause an error in the process of inspecting the blank or the process of making the blank. Therefore, it is desired that the waste residue generated in the process of forming the window portion is reliably recovered.

  However, the punched residue is smaller and lighter than the blank and the blank portion, and therefore, it is easily scattered and mixed between the blanks. In addition, when the punching pin or punching scrap is charged, the punching scrape may stick to the punching pin, and the punching scrape may come off the through hole of the support substrate together with the punching pin that returns to the original position. Conceivable.

  The present invention has been made in consideration of the above points, and an object thereof is to provide a stripper device and a punching method that can improve the reliability of recovery of punched waste.

  The present invention is a stripper device that includes a punched substrate and a support substrate that are opposed to each other and are detachable from each other, and punches a part of the sheet by the punched substrate and the support substrate to form a window portion in the sheet, The punching substrate is provided with a punching pin protruding downward toward the support substrate, and the support substrate has a through hole formed at a position corresponding to the punching pin of the punching substrate, The opening at the upper end of the through hole is formed so as to be included in the part of the sheet in a plan view, and the stripper device detects a scrap generated by punching out the part of the sheet. And a punching device generated from the sheet includes the through hole of the support substrate. It is guided downward to the sensor device by a hollow guide portion formed, and the guide portion extends in the vertical direction toward the sensor device to a position below the lowest position of the punching pin. A stripper device.

  In the stripper device according to the present invention, preferably, a distance between a lower end of the guide portion and a lowermost reaching position of the punching pin is 15 mm or more.

  In the stripper device according to the present invention, preferably, the opening at the lower end of the guide portion is formed so as to include the punched residue in a plan view regardless of the posture of the punched residue.

  In the stripper device according to the present invention, the guide portion may include the through hole formed in the support substrate and a cylindrical member provided below the support substrate. In this case, a cavity formed in the cylindrical member communicates with the through hole of the support substrate.

  In the stripper device according to the present invention, the through hole of the support substrate may extend in a vertical direction toward the sensor device to a position below a lowermost reaching position of the punching pin. In this case, the through hole of the support substrate can function as the guide portion.

  The present invention is a punching method of punching a part of a sheet using a punching substrate and a support substrate that are opposed to each other and detachable from each other to form a window portion on the sheet, A punching pin protruding downward toward the support substrate is provided, and the support substrate has a through hole formed at a position corresponding to the punch pin of the punch substrate, and an opening at the upper end of the through hole. The portion is formed so as to be included in the part of the sheet in a plan view, and the punching method includes a step of placing the sheet on the support substrate, and bringing the punched substrate closer to the support substrate. A punching step of punching out the portion of the sheet, and punching generated by punching out the portion of the sheet. And the step of detecting by using a hollow guide portion configured to include the through hole of the support substrate, and the guide member is guided downward to the sensor device. The part is a punching method that extends in a vertical direction toward the sensor device to a position below a lowermost reach position of the punching pin.

  In the present invention, the opening at the upper end of the through hole of the support substrate is formed so as to be included in a part of the sheet that is punched out in plan view. For this reason, even if the punched debris sticks to the punching pin due to static electricity or the like, the punched debris catches on the upper end of the through hole, so the punched debris comes out of the through hole with the punching pin. Can be prevented. Further, in the present invention, a hollow guide portion is provided for guiding the generated waste residue downward to the sensor device. This guide part is comprised including the through-hole of the support substrate. Moreover, the guide part is extended in the up-down direction toward the sensor device to a position below the lowermost reach position of the punching pin. Therefore, even when the removal residue is small and light, and the dropping path of the removal residue can be disturbed, the removal residue can be more reliably guided to the sensor device. As a result, the generated waste residue can be detected more reliably by the sensor device. As a result, it is possible to suppress the occurrence of a situation in which the production line is stopped due to the fact that the extracted residue is not detected, that is, the extracted residue may be mixed into the product. For this reason, manufacturing efficiency can be improved.

FIG. 1 is a diagram schematically illustrating a blank manufacturing apparatus for manufacturing a product portion (blank) from a sheet. FIG. 2A is a plan view showing a sheet on which cut-out ruled lines are formed, and FIG. 2B is an enlarged plan view showing a product portion allocated to the sheet. FIG. 3 is a plan view showing a sheet in which a hole dropping portion is punched and a window portion is formed. 4A is a plan view showing a product portion obtained by the blank manufacturing apparatus, and FIG. 4B is a plan view showing a blank portion separated from the product portion. FIG. 5 is a perspective view showing the stripper device according to the embodiment of the present invention. 6 is an enlarged cross-sectional view of a part of the stripper device shown in FIG. FIG. 7 is a diagram for explaining the size relationship between the punching head, the first opening at the upper end of the guide portion, and the hole punching portion of the sheet. FIG. 8 is a view for explaining the size relationship between the punched residue, the second opening at the lower end of the guide portion, and the passage hole of the sensor device. FIGS. 9A to 9C are views for explaining a process of forming a window portion in a sheet by punching out a hole punching portion of the sheet using a stripper device. FIG. 10A is a cross-sectional view showing a modification of the stripper device according to the embodiment of the present invention. FIG. 10B is a cross-sectional view showing a modification of the stripper device according to the embodiment of the present invention. FIG. 11 is a cross-sectional view showing a modification of the stripper device according to the embodiment of the present invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 9A to 9C. First, the entire blank manufacturing apparatus 10 for manufacturing a product part (blank) 23 from the sheet 22 will be described with reference to FIG.

Blank Manufacturing Apparatus As shown in FIG. 1, the blank manufacturing apparatus 10 includes a sheet feeding device 20, a platen device 30, a stripper device 40, and a blanking device 60 that are arranged in order from the upstream side along the flow direction of the sheet 22. ing.

  The sheet feeding device 20 is for feeding sheets 22 from a bundle of sheets 21 one by one. Usually, a plurality of product parts 23 are allocated to one sheet 22. As the sheet 22, for example, a paper material or a plastic sheet suitable for a carton is used. Characters and images may be printed on the sheet 22 in advance. Alternatively, a roll-shaped sheet may be supplied instead of the sheet bundle 21, and the sheet 22 may be supplied after being cut into a single sheet before the platen device 30.

  The platen device 30 is for forming cuts (cutout ruled lines) in the sheet 22. The platen device 30 has a female mold 31 and a male mold 32. The sheets 22 sent one by one from the sheet feeding device 20 are placed on the female mold 31. Then, by pressing the male die 32 against the female die 31, cutout ruled lines along the outer shape of the product portion 23 allocated to the sheet 22 and the outer shape of the window portion formed in the product portion 23 are formed on the sheet 22. Attached.

  The stripper device 40 is for punching a part of the sheet 22 along a cut ruled line formed on the sheet 22, thereby forming a window portion on the sheet 22. As shown in FIG. 1, the stripper device 40 includes a support substrate 43 on which the sheet 22 is placed, and a punching substrate 41 provided above the support substrate 43 so as to face the support substrate 43. The punched substrate 41 and the support substrate 43 are configured so as to be separable from each other, that is, the interval between them is variable. For example, the punched substrate 41 is configured to be movable in the vertical direction. Other specific configurations of the stripper device 40 will be described later.

  The blanking device 60 is for separating the sheet 22 into the product portion 23 and the margin portion 24. The blanking device 60 includes, for example, a blanking tool 61 that can punch the product portion 23 assigned to the sheet 22 along a cut ruled line formed on the sheet 22. The product parts 23 that have been lifted are stacked on the pallet 62. On the other hand, the blank portion 24 remaining after the product portion 23 is punched from the sheet 22 is sent to a paper discharge portion (not shown).

Blank Manufacturing Method Next, with reference to FIGS. 2 (a), 2 (b) to 4 (a) (b), an outline of a blank (product part 23) manufacturing method implemented by using the blank manufacturing apparatus 10 will be described. explain.

  First, the sheet 22 is sent to the platen device 30 using the paper feeding device 20. In the platen device 30, a platen process for forming the cut ruled line 22 a on the sheet 22 using the male mold 31 and the female mold 32 is performed. FIG. 2A is a plan view showing the sheet 22 on which the cut ruled lines 22a are formed. A plurality of product portions 23 are allocated to the sheet 22, and cut-out ruled lines 22 a are formed along the outer shape of the product portions 23. In each product part 23, cut ruled lines 22a are formed in a pattern along the outer shape of a window part to be formed later. A portion inside the cut-out ruled line 22a formed in a pattern along the outer shape of the window portion is also referred to as a hole dropping portion 25. In addition, in FIG. 2, although the example in which the hole dropping part 25 has a rectangular shape is shown, the shape of the hole dropping part 25, that is, the shape of the window part is not particularly limited. For example, a polygonal shape such as a pentagon or a hexagon may be employed as the shape of the window.

  FIG. 2B is an enlarged plan view showing one product portion 23 assigned to the sheet 22. As shown in FIG. 2B, the cut-out ruled line 22a includes a linear cut. Further, a plurality of connecting portions 22b provided at regular intervals so as to interrupt the cutting are provided between the blank portion 24 and the product portion 23 and between the product portion 23 and the hole dropping portion 25. That is, the platen device 30 is configured to form a cut in the sheet 22 along the outer shape of the product portion 23 and the outer shape of the hole dropping portion 25 while leaving the plurality of connecting portions 22b. The width and number of the cut-out ruled lines 22a are such that the product part 23 and the hole dropping part 25 do not fall off when the sheet 22 is conveyed in the blank manufacturing apparatus 10, but in the stripper apparatus 40 and the blanking apparatus 60, the hole dropping is performed. The section 25 and the product section 23 are appropriately set so that they can be punched out.

  The specific structure of the cut ruled line 22a is not particularly limited as long as the product part 23 and the hole dropping part 25 can be punched along the cut ruled line 22a. For example, the cut ruled line 22a may be configured as a half cut line.

  Next, a first punching process is performed in which the hole dropping portion 25 of the sheet 22 is punched using the stripper device 40 to form the window portion 23 a in the sheet 22. FIG. 3 is a plan view showing the sheet 22 in which the window portion 23a is formed by punching out the hole dropping portion 25. FIG.

  Thereafter, the blanking device 60 is used to punch out the product portion 23 of the sheet 22, and a second punching process for separating the sheet 22 into the product portion 23 and the blank portion 24 is performed. FIG. 4A is a plan view showing a plurality of product parts 23 obtained by punching using the blanking device 60. FIG. 4B is a plan view showing a blank portion 24 remaining after the product portion 23 is punched from the sheet 22.

  Thereafter, the product part 23 obtained is boxed to obtain a box formed with a window part. In addition, in order to prevent a consumer from touching the accommodation inside a box through a window, the window part may be covered with the transparent film.

Stripper Device Next, the stripper device 40 for carrying out the first punching step will be described in detail with reference to FIGS. FIG. 5 is a perspective view showing the stripper device 40, and FIG. 6 is an enlarged view showing a part of the stripper device 40 shown in FIG.

(Punching pin)
As shown in FIG. 5, the punching substrate 41 is provided with a plurality of punching pins 42 that protrude downward toward the support substrate 43. Further, through holes 44 are formed in the support substrate 43 at positions corresponding to the punch pins 42 of the punch substrate 41. For this reason, it is possible to punch out a part of the sheet 22 using the punching pin 42 and push the punched residue generated by the punching into the through hole 44.

  As shown in FIG. 5, the punching pin 42 has a punching head 42a provided at the lower end thereof. The punching head 42a is a part that contacts the sheet 22 and presses the hole dropping part 25 of the sheet 22 in the first punching process. The shape of the punching head 42a is set according to the shape of the hole dropping portion 25 so that the hole dropping portion 25 can be appropriately punched. For example, when the hole dropping portion 25 has a rectangular shape, the punching head 42a may also have a rectangular shape. Similarly, the through hole 44 of the support substrate 43 may have a rectangular outline in plan view. That is, the contour of the punching head 42 a of the punching pin 42 and the contour of the upper end 44 a of the through hole 44 may be similar to the contour of the hole dropping portion 25. The size relationship of the outlines of the hole dropping part 25, the punching head 42a, and the through hole 44 will be described later.

(Sensor device)
As shown in FIG. 5, the stripper device 40 further includes a sensor device 50 for detecting a punched residue 26 generated when a part of the sheet (hole removing portion 25) is punched out. The type of the sensor device 50 is appropriately set in accordance with the shape of the punch 26 to be detected. Here, a case where a photoelectric sensor is used as the sensor device 50 will be described.

  The photoelectric sensor includes a light projecting unit that emits light such as visible light and infrared light, and a light receiving unit that detects light affected by a detection target. Such a photoelectric sensor determines the presence or absence of a detection target by comparing the amount of light emitted from the light projecting unit with the amount of light detected by the light receiving unit, and the detection result is used as an electrical signal or the like. Can be output. The specific detection method employed in the photoelectric sensor is not particularly limited. For example, a method for determining the presence or absence of a detection target based on a change in the amount of light caused by reflection of light by the detection target, a method for determining the presence or absence of a detection target based on a change in light amount due to light shielding by the detection target, etc. Conceivable.

  Further, the structure of the photoelectric sensor is not particularly limited. For example, the photoelectric sensor may be configured to provide a light projecting unit on one of a pair of opposing members and a light receiving unit on the other to detect a detection target that has passed between the pair of members. In addition, a member in which a hole through which a detection target can pass (hereinafter also referred to as a passage hole) is prepared, and a light projecting portion and a light receiving portion are installed on the wall surface of the passage hole of this member, thereby passing through the passage hole. A structure of detecting a detection target to be performed may be employed. FIG. 5 shows an example in which the sensor device 50 includes a sensor head 51 in which a passage hole 52 is formed. As such a sensor device 50, a commercially available photoelectric sensor can be used, for example, an optical passage sensor PG-602 manufactured by Keyence Corporation can be used. In PG-602, the passage hole 52 of the sensor head 51 is formed in a square shape with a side of 21 mm, and can detect an object having a minimum diameter of 0.5 mm.

(Guide part)
By the way, the punched residue 26 is generally small and light. For example, the dimension of one side of the punched residue 26 is about several mm to several tens of mm. For this reason, the scrap 26 generated from the sheet 22 may be scattered in a direction shifted from the direction toward the sensor device 50. In this case, the generated punch 26 is not detected by the sensor device 50. There is no particular problem as long as the punched residue 26 scattered in an unintended direction is not mixed into the product part 23, but the punched residue 26 may be mixed into the product part 23. That is, if the sensor device 50 does not detect the removal residue 26, it means that there is a possibility that the removal residue 26 mixed in the product portion 23 exists. Therefore, in order to surely prevent the extracted residue 26 from being mixed into the product portion 23, the blank manufacturing apparatus 10 is stopped every time a situation occurs in which the generated extracted residue 26 is not detected by the sensor device 50. It is preferable to search for the punch 26 that has not been detected by the sensor device 50. However, if the situation that the generated punch 26 is not detected by the sensor device 50 frequently occurs, the blank manufacturing apparatus 10 is frequently stopped, and the production efficiency of the product section 23 is reduced. .
In consideration of such problems, in the present embodiment, the punched residue 26 generated from the sheet 22 reaches the sensor device 50 by the hollow guide portion 46 configured to include the through hole 44 of the support substrate 43. It is guided downward. Hereinafter, the guide portion 46 will be described with reference to FIGS. 5 and 6.

  In the present embodiment, the guide portion 46 includes a through hole 44 formed in the support substrate 43 and a cylindrical member 45 provided below the support substrate 43. The cylindrical member 45 is installed such that a hollow portion 45 c formed in the cylindrical member 45 communicates with the through hole 44 of the support substrate 43. In this case, the through hole 44 of the support substrate 43 and the hollow portion 45 c of the tubular member 45 constitute a hollow portion of the guide portion 46 for guiding the punched residue 26 downward to the sensor device 50. As a material constituting the cylindrical member 45, for example, a thermoplastic resin film containing an antistatic agent is used, and specifically, a PET film containing an antistatic agent having a thickness of 3 mm may be used. Since the guide part 46 has an anti-static function, it is possible to prevent the extracted residue 26 from adhering to the side surface of the guide unit 46 or the extracted residue 26 from being caught.

  In the following description, the hollow portion of the guide portion 46 at the upper end of the guide portion 46 is referred to as a first opening portion 46a, and the hollow portion of the guide portion 46 at the lower end of the guide portion 46 is referred to as a second opening portion 46b. Sometimes. In the present embodiment, the upper end 44 a of the through hole 44 of the support substrate 43 constitutes the first opening 46 a of the guide portion 46, and the lower end 45 b of the hollow portion 45 c of the cylindrical member 45 is the second end of the guide portion 46. Two openings 46b are formed. The shape of the hollow portion 45c of the cylindrical member 45 in a plan view, that is, when viewed from above, is set according to the shape of the punched residue 26 so that the punched residue 26 can pass through the cavity 45c. For example, when the punched portion 26 (hole removing portion 25) has a rectangular shape, the hollow portion 45c may similarly have a rectangular outline. That is, the outline of the hollow portion 45c may be similar to the outline of the punched residue 26 (hole removing portion 25).

  As long as the through hole 44 of the support substrate 43 and the hollow portion 45c of the cylindrical member 45 communicate with each other, the installation method of the cylindrical member 45 is not particularly limited. For example, as illustrated in FIG. The fixing member 47 such as a bolt attached to the flange portion at the upper end of the cylindrical member 45 is fixed to the lower surface of the support substrate 43. Thereby, the cylindrical member 45 can be attached to the support substrate 43 without a gap, and this can prevent the dregs 26 from entering the gap between the support substrate 43 and the cylindrical member 45. .

  The sensor head 51 of the sensor device 50 described above has a guide portion so that the drainage 26 discharged from the second opening 46 b at the lower end of the guide portion 46 is appropriately guided to the passage hole 52 of the sensor head 51 of the sensor device 50. It is installed at a position below the lower end of 46. By the way, the support substrate 43 is generally made of a material having a predetermined elasticity, for example, a veneer plate having a thickness of 9 mm. For this reason, vibration may be generated in the support substrate 43 during the first punching process using the punched substrate 41 and the support substrate 43, and this vibration may be transmitted to the cylindrical member 45. On the other hand, the detection accuracy in the sensor device 50 generally decreases when vibration occurs in the sensor head 51. Therefore, preferably, as shown in FIG. 6, the sensor head 51 is installed at a predetermined distance d from the lower end of the guide portion 46. Thereby, it is possible to prevent the vibration of the support substrate 43 from being transmitted to the sensor head 51, thereby realizing high detection accuracy in the sensor device 50. The value of the interval d is set so as to be larger than the amplitude of vibration of the guide portion 46 in the vertical direction and not so that the punched residue 26 does not enter. For example, the distance d is in the range of 0.5 to 3.0 mm. In FIG. 5, the space between the tubular member 45 and the sensor head 51 is drawn large for convenience in order to illustrate the lower end of the tubular member 45. In FIG. 5, the cylindrical member 45 and the sensor device 50 are provided only for one through hole 44 among the plurality of through holes 44 of the support substrate 43 in order to prevent the drawing from becoming complicated. However, the cylindrical member 45 and the sensor device 50 may be provided for all the through holes 44.

  The specific method for installing the sensor head 51 of the sensor device 50 so as to leave the above-mentioned distance d between the guide portion 46 is not particularly limited. For example, although not shown, one end of the bracket can be attached to the sensor head 51 and the other end of the bracket can be attached to an iron frame for supporting the support substrate 43. In this case, since the vibration of the support substrate 43 is hardly transmitted to the iron frame, the sensor head 51 can be held at a desired position in a substantially stationary state.

(Regarding the size of the hole removal part)
By the way, when the punching pin 42 and the punching residue 26 are charged, the punching residue 26 is not attached to the punching head 42a of the punching pin 42 and is not separated from the punching pin 42, and the punching pin 26 returns to the original position. There is a possibility that the through hole 44 may be pulled up. In this case, there may occur a situation in which the punched residue 26 is then scattered away from the punching pin 42 and falls onto the sheet 22 or the product part 23 and mixed between the product parts 23. In order to prevent such a situation from occurring, in the present embodiment, the opening of the upper end 44a of the through hole 44 is formed to be smaller than a part of the sheet 22 (hole dropping part 25).

  The above-described magnitude relationship between the punched residue 26 and the upper end 44a of the through hole 44 will be further described with reference to FIG. FIG. 7 is a diagram illustrating the outline of each element when the hole dropping portion 25 and the upper end 44a of the through hole 44 are viewed from above, that is, in plan view. In FIG. 7, the outline of the punching head 42a of the punching pin 42 is also shown.

  As shown in FIG. 7, the contour of the first opening 46 a of the guide portion 46, that is, the contour of the upper end 44 a of the through hole 44 is included inside the contour of the hole dropping portion 25 of the sheet 22. In this case, in the first punching process of punching the hole dropping part 25, the hole dropping part 25 pressed by the punching pin 42 is bent along the contour of the upper end 44a of the through hole 44, and the punching part 25 26 enters the through-hole 44. On the other hand, when the punching pin 42 returns to the original position, even if the punching residue 26 is stuck to the punching pin 42, the degree of bending generated in the punching residue 26 at that time is based on the elasticity of the punching residue 26. To some extent. This means that when the punching pin 42 returns, the outline of the punched residue 26 protrudes at least partially from the outline of the upper end 44a of the through hole 44. Therefore, the punched waste 26 cannot pass through the upper end 44a of the through hole 44 together with the punching pin 42, and the punched waste 26 is shaken off from the punching head 42a. As a result, it is possible to prevent the extracted residue 26 from being mixed between the product portions 23. As shown in FIG. 7, the punching head 42 a of the punching pin 42 is configured such that the outline of the punching head 42 a is included in the outline of the upper end 44 a of the through hole 44 in plan view.

  On the other hand, when the contour of the hollow portion of the guide portion 46 is smaller than the contour of the punched portion 26 over the entire area, the punched residue 26 is caught on the wall surface of the hollow portion of the guide portion 46, and thus the punched residue 26 is attached to the sensor device 50. It can happen that it does not reach. In order to suppress the occurrence of such a situation, the outline of the second opening 46b at the lower end of the guide part 46, that is, the outline of the lower end 45b of the hollow part 45c of the cylindrical member 45 is preferably Regardless of this, it is configured so as to include the blank 26 in a plan view.

  The above-described magnitude relationship between the punch 26 and the lower end 45b of the hollow portion 45c of the cylindrical member 45 will be further described with reference to FIG. FIG. 8 is a diagram showing the outline of each element when the punched residue 26 and the lower end 45b of the hollow portion 45c of the cylindrical member 45 are viewed from above, that is, in plan view. In FIG. 8, the outline of the passage hole 52 of the sensor head 51 is also shown.

  As shown in FIG. 8, the contour of the lower end 45 b of the hollow portion 45 c of the cylindrical member 45, that is, the contour of the second opening 46 b of the guide portion 46 includes the punched waste 26 regardless of the posture of the punched waste 26. It is like that. Here, “regardless of the posture of the punched portion 26” means that the sides of the rectangular punched portion 26 and the sides of the rectangular hollow portion 45c are non-parallel due to the rotation of the punched portion 26 during dropping. This means that the contour of the hollow portion 45c is set so that the punched residue 26 can pass through the hollow portion 45c. Specifically, as shown in FIG. 8, the outline of the cavity 45c is set so that the locus 26a drawn by rotating the punch 26 on the horizontal plane is included in the outline of the lower end 45b of the cavity 45c. It means that

  As shown in FIG. 8, the passage hole 52 of the sensor head 51 preferably includes the contour of the lower end 45b of the hollow portion 45c of the cylindrical member 45 or the same as the contour of the lower end 45b of the hollow portion 45c in plan view. Configured to be. As a result, the punched residue 26 can enter the passage hole 52 of the sensor head 51 without being caught by the upper end of the sensor head 51.

  Preferably, the outline of the lower end 44 b of the through-hole 44 and the outline of the upper end 45 a of the hollow portion 45 c of the cylindrical member 45 are also included in the extraction dregs 26 regardless of the attitude of the extraction dregs 26. For example, as shown in FIG. 6, the through hole 44 is configured to expand as its area goes downward. The hollow portion 45c of the cylindrical member 45 is configured such that the area thereof is constant regardless of the position in the vertical direction. As a result, it is possible to prevent the punched residue 26 from being caught on the wall surfaces of the lower end 44b of the through-hole 44 and the hollow portion 45c of the cylindrical member 45, and thereby the punched residue 26 is more reliably secured to the sensor device 50. Will be able to lead to.

Punching method now to FIG. 9 (a) ~ (c) , will be described in detail how to punch a hole down portion 25 of the sheet 22 using a stripper device 40 described above.

  First, as shown in FIG. 9A, the sheet 22 is placed on the support substrate 43. Further, by moving the punching substrate 41 downward toward the support substrate 43, the punching head 42 a of the punching pin 42 is brought into contact with the hole dropping portion 25 of the sheet 22.

  Next, as shown in FIG. 9B, a punching process is performed in which the punched substrate 41 is further brought closer to the support substrate 43 and the hole dropping portion 25 of the sheet 22 is punched by the punching pins 42. FIG. 9B shows the punching pin 42 at the lowest position. The lowermost reaching position of the punching head 42 a of the punching pin 42 is below the lower surface of the support substrate 43. The punched residue 26 pushed into the inside of the guide portion 46 (hollow portion) by the punching pin 42 is then guided downward to the sensor head 51 of the sensor device 50 along the guide portion 46. At this time, the punching head 42a presses the central portion of the punched residue 26, and therefore the peripheral portion of the punched residue 26 may be deformed upward with respect to the central portion. After that, when the punch 26 reaches the sensor device 50 and passes through the passage hole 52 of the sensor head 51 (see FIG. 9C), the sensor device 50 detects the punch 26. Information that the sensor device 50 has detected the punch 26 is transmitted, for example, to an unillustrated control device of the blank manufacturing apparatus 10 as an electrical signal. The control device determines whether or not the assumed number of punched pieces 26 matches the number of detected punched pieces 26. When it is confirmed that they match, the control device continues the manufacturing process using the blank manufacturing device 10. On the other hand, when it is confirmed that a mismatch has occurred, the control device may stop the blank manufacturing apparatus 10. The punch 26 that has passed through the passage hole 52 of the sensor head 51 is collected by a collection unit (not shown).

  By the way, while the punching waste 26 is being pushed from the punching head 42 a of the punching pin 42, the dropping path of the punching waste 26 is stably determined based on the moving path of the punching pin 42. On the other hand, after the punching waste 26 is separated from the punching head 42a of the punching pin 42, that is, in a space below the position where the punching pin 42 reaches the lowermost position, the punching waste 26 falls freely based on gravity. Become. For this reason, depending on the shape of the punch debris 26 and the state of the airflow, the dropping path of the punch debris 26 may be disturbed. Here, in the present embodiment, as shown in FIG. 9, the guide portion 46 extends in the vertical direction toward the sensor device 50 to a position below a position where the punching pin 42 reaches the lowermost position. For this reason, in the area | region where the extraction dregs 26 falls freely, the fall path | route of the extraction dregs 26 can be appropriately determined so that the extraction dregs 26 may fall toward the sensor apparatus 50 by the guide part 46. As a result, it is possible to suppress the occurrence of a situation in which the punched residue 26 is not detected by the sensor device 50.

  In FIG. 9B, the distance that the guide portion 46 guides the punching piece 26 in the vertical direction, that is, the distance between the lower end of the guide portion 46 and the lowest position of the punching pin 42 is indicated by the symbol L. . The distance L is appropriately determined according to the shape of the hollow portion of the guide portion 46, the shape of the passage hole 52 of the sensor head 51, etc., but preferably the distance L is 15 mm or more. As a result, it is possible to more reliably stabilize the dropping path of the punched residue 26.

  Note that various modifications can be made to the above-described embodiment. Hereinafter, modified examples will be described with reference to the drawings. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above embodiment are used for the parts that can be configured in the same manner as in the above embodiment. A duplicate description is omitted. In addition, when it is clear that the operational effects obtained in the above-described embodiment can be obtained in the modified example, the description thereof may be omitted.

(Modified example of through hole of support substrate)
In the above-described embodiment, the example in which the through hole 44 is configured so as to continuously expand as the area of the through hole 44 goes downward is shown. However, the present invention is not limited to this, and as shown in FIG. 10A, the through hole 44 may be configured such that the area thereof changes with a part of the through hole 44 as a boundary.

Further, in the above-described embodiment and the modification shown in FIG. 10A, the example in which the contour of the lower end 44b of the through hole 44 is configured to be larger than the contour of the upper end 44a has been described, but the present invention is not limited thereto. There is nothing. For example, as shown in FIG. 10B, in the through hole 44, the contour of the upper end 44a and the contour of the lower end 44b may be the same shape. That is, both the outline of the upper end 44a and the outline of the lower end 44b may be included in the outline of the hole dropping portion 25 of the sheet 22 in plan view. Even in this case, when the punching substrate 41 or the support substrate 43 is moved so that the lowermost reaching position of the punching pin 42 is lower than the lower surface of the support substrate 43, the punching waste 26 is moved to the punching pin 42. It is pushed and can pass through the through hole 44 with certainty.
Note that the hollow portion of the guide portion 46 at the position below the lowest position where the punching pin 42 reaches, that is, the hollow portion 45c of the cylindrical member 45 includes the punched portion 26 in a plan view regardless of the posture of the punched portion 26. Is configured to do. For this reason, the punched waste 26 after being separated from the punching pin 42 can reach the sensor device 50 without being caught by the wall surface of the cavity 45c.

(Modification of guide part)
Further, in the above-described embodiment and each modification, an example in which the guide portion 46 includes the cylindrical member 45 provided below the support substrate 43 has been described. However, the specific configuration of the tubular member 45 is not particularly limited as long as the punched portion 26 can be appropriately guided to the sensor device 50. For example, as shown in FIG. 11, the guide portion 46 may be configured by the through hole 44 of the support substrate 43 without using the cylindrical member 45. In this case, the through hole 44 extends in the vertical direction toward the sensor device 50 to a position below the position where the punching pin 42 reaches the lowermost position. Therefore, the upper end 44 a of the through hole 44 constitutes the first opening 46 a at the upper end of the above-described guide portion 46, and the lower end 44 b of the through hole 44 constitutes the second opening 46 b at the lower end of the guide portion 46. be able to.

(Variation of punching process)
In the above-described embodiment, the first punching process for punching the hole dropping part 25 from the sheet 22 is performed by the stripper device 40, and the second punching process for punching the product part 23 from the sheet 22 is performed by the blanking apparatus 60. An example to be shown. That is, the example in which the punching part 25 is punched from the sheet 22 and the product part 23 and the margin part 24 are separated from each other by another apparatus is shown. However, the present invention is not limited to this, and the punching part 25 is punched from the sheet 22 and the product part 23 and the margin part 24 may be separated at the same place by the same device. . For example, an integrated device combining the stripper device 40 and the blanking device 60 may be used. For example, an integrated device that can realize an operation in which the hole dropping part 25 and the blank part 24 are pushed downward and punched out from the sheet 22 to leave the product part 23 is conceivable. Alternatively, an integrated device that can realize the work of punching the hole dropping part 25 downward from the sheet 22 and punching the product part 23 upward from the sheet 22 is also conceivable.

  In addition, although some modified examples with respect to the above-described embodiment have been described, naturally, a plurality of modified examples can be applied in combination as appropriate.

DESCRIPTION OF SYMBOLS 10 Blank manufacturing apparatus 20 Sheet feeder 22 Sheet 22a Cut-out ruled line 22b Joint part 23 Product part 23a Window part 24 Margin part 25 Punching part 26 Punching waste 30 Platen apparatus 40 Stripper apparatus 41 Punching board 42 Punching pin 42a Punching head 43 Support board 44 Through hole 44a Upper end 44b Lower end 45 Cylindrical member 45a Upper end 45b Lower end 45c Hollow portion 46 Guide portion 46a First opening portion 46b Second opening portion 47 Fixing tool 50 Sensor device 51 Sensor head 52 Passing hole 60 Blanking device

Claims (6)

A stripper device that includes a punched substrate and a support substrate that face each other and are provided so as to be able to contact and separate from each other, and punches a part of the sheet by the punched substrate and the support substrate to form a window portion on the sheet,
The punching substrate is provided with a punching pin that protrudes downward toward the support substrate,
In the support substrate, a through hole is formed at a position corresponding to the punch pin of the punch substrate,
The opening at the upper end of the through hole is formed so as to be included in the part of the sheet in plan view,
The stripper device further includes a sensor device for detecting a scrap generated when the part of the sheet is punched,
The extracted residue generated from the sheet is guided downward to the sensor device by a hollow guide portion including the through hole of the support substrate,
The said guide part is a stripper apparatus extended in the up-down direction toward the said sensor apparatus to the position below rather than the lowest reach | attainment position of the said punch pin.   The stripper device according to claim 1, wherein a distance between a lower end of the guide portion and a lowermost reaching position of the punching pin is 15 mm or more.   The stripper device according to claim 1 or 2, wherein the opening at the lower end of the guide portion is formed so as to include the punched residue in a plan view regardless of the posture of the punched residue. The guide portion includes the through hole formed in the support substrate, and a cylindrical member provided below the support substrate,
The stripper device according to any one of claims 1 to 3, wherein a hollow portion formed in the tubular member communicates with the through hole of the support substrate.   The said through-hole of the said support substrate is extended in the up-down direction toward the said sensor apparatus to the position below rather than the lowest position reached | attained of the said punching pin. Stripper device. A punching method for punching a part of a sheet by using a punching substrate and a support substrate which are provided so as to be opposed to each other and can be separated from each other, and form a window portion on the sheet,
The punching substrate is provided with a punching pin that protrudes downward toward the support substrate,
In the support substrate, a through hole is formed at a position corresponding to the punch pin of the punch substrate,
The opening at the upper end of the through hole is formed so as to be included in the part of the sheet in plan view,
The punching method is:
Placing the sheet on the support substrate;
A punching step of bringing the punched substrate closer to the support substrate and punching out the portion of the sheet;
A step of detecting, using a sensor device, a scrap generated when the part of the sheet is punched,
The extracted residue generated from the sheet is guided downward to the sensor device by a hollow guide portion including the through hole of the support substrate,
The punching method, wherein the guide portion extends in a vertical direction toward the sensor device to a position below a lowermost reaching position of the punching pin.