JP2009061563A - Die for punching forming sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die for punching a forming sheet, in which the mounting position of a punching unit can be adjusted, and the punching unit can be mounted without trouble due to the damage of a screw. <P>SOLUTION: Members 51 each having a female screw are fixed to the positions for mounting the punching unit 11 on a mounting plate 21. Through holes 19 are formed in the portions of the punching unit 11 corresponding to the members 51 having the female screw so as to insert the members 51 thereinto with a clearance. When the punching unit 11 is attached to the mounting plate 21, the punching unit 11 is arranged on the mounting plate 21 such that the members 51 having the female screw are inserted into the through holes 19, their positions are adjusted, then a bolt 71 having a head is screwed into the female screw of the members 51 having the female screw, and the punching unit 11 is attached to the mounting plate 21. The members 51 having the female screw have been preliminarily fixed to the mounting plate 21 without using bolts. When the punching unit 11 is arranged on the mounting plate 21, therefore, the female screws of the members 51 having the female screw cannot be damaged even if the punching unit 11 has been brought into contact with the members 51 having the female screw. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a molded sheet punching die, and more specifically, to produce a tray used for packing food such as sugar beet, etc., and therefore, a single molded sheet (hereinafter referred to as a molded sheet) formed in a form that connects the tray vertically and horizontally. The present invention also relates to a molded sheet punching die used for punching and forming individual trays.

  In supermarkets and the like, foods such as meat, fish, and fruits are displayed and sold in a form that is divided into small packages or trays (plates or trays) made of resin sheets or polystyrene foam. Such trays used for display and sales are usually formed by vacuum forming or the like as a single large molded sheet (tray group molded body) that is formed into a large number of grids in a vertical and horizontal form. After that, it is manufactured by punching into individual trays with a molded sheet punching die. For this punching, usually, a plurality of punching units having punching blades formed so as to punch one or more trays according to the size and shape of the tray are mounted side by side on the mounting plate. A molded sheet punching die is used.

  By the way, even if the molded sheet at the stage formed by vacuum forming or the like is the same, it is not always formed as a constant due to variations in raw material resin used or manufacturing conditions. For example, the manufacturing lot may be formed with different deformations such as dimensional error and warpage. When the tray is punched at the stage of such a sheet having such an error, the punching blade in the molded sheet punching die is not correctly positioned at the position to be cut in the sheet. Therefore, in such a case, the punching is performed in a state where the position is shifted, and there is a problem that a punching defect that a tray having a desired size and shape cannot be obtained occurs. Such a problem is easily manifested because errors, warpage, and the like are likely to occur particularly in a portion near the outer periphery of the molded sheet.

Therefore, conventionally, in order to prevent the occurrence of such punching defects, the mounting position of the punching unit (hereinafter also simply referred to as a unit) with respect to the mounting plate is finely adjusted so as to cope with errors and the like when punching molded sheets. And the operation | work of adjusting the punching position was performed, and the adjustment means of the position for that was provided in the shaping | molding sheet punching die (patent document 1). In the invention described in Patent Document 1, bolts are vertically installed at positions corresponding to the punching units on the mounting plate, while the bolts hold gaps in the units to be mounted on the mounting plate. After making a through hole of a size that can be inserted through, placing each unit on the mounting plate and putting the bolt in the through hole, each unit is adjusted according to the cutting position of the molded sheet Is adjusted to adjust the position of the punching blade. In other words, after such adjustment, the nuts are screwed into the erected bolts from above and each unit is fixed to the mounting plate.
JP 09-047999 A

  However, although the technique described in Patent Document 1 described above can position or adjust each unit corresponding to an error of a molded sheet, there are problems to be solved as follows. This is because in this case, bolts are erected on the mounting plate corresponding to each unit. Therefore, when viewed as a mounting plate, a large number of bolts are exposed with their outer peripheral screws exposed. It has been erected. On the other hand, in the step of attaching each unit to the mounting plate, each unit is arranged at a predetermined position on the mounting plate, and a bolt is inserted into the through hole. Accordingly, in such an operation process, the back surface of each unit or the angle formed by the back surface and the inner peripheral surface of the through hole may collide with the screw of the bolt. Also, there is a risk that various objects such as tools collide with the screws of the bolts in the storage and handling process of the mounting plate itself.

  As described above, in the technique described in Patent Document 1, a large number of bolts are erected on the mounting plate corresponding to each unit, and the screws are exposed to the outside. Easy to be deformed. If there are such scratches or deformations, there is a problem that when the nut is tightened in the installation of each unit, the screwing may not be smooth or the smooth tightening may not be possible. In some cases, the mounting of each unit to the mounting plate may be hindered.

  The present invention has been made to solve these problems, and provides a molded sheet punching die in which the mounting position can be adjusted without hindering the screw from being damaged and mounting the punching unit on the mounting plate. Is the purpose.

The invention according to claim 1 for solving the above problems is a molded sheet punching die used for punching individual trays from a molded sheet formed in a form in which trays of a predetermined shape are connected vertically and horizontally,
A plurality of punching units having punching blades formed so as to punch one or a plurality of trays are attached to a mounting plate, and when at least one of the punching units is attached to the mounting plate, In what has the attachment position adjustment means which can adjust the attachment position,
As its mounting position adjustment means,
A member with a female screw having a female screw inside is fixed to a portion of the mounting plate where the punching unit is attached, while the member with the female screw holds a gap at a portion of the punching unit corresponding to the member with the female screw. Through holes that can be inserted are formed,
When the punching unit is attached to the mounting plate, the punching unit is disposed on the mounting plate so that the female threaded member is inserted into the through hole, and the punching unit is mounted within the gap. The position is adjusted, the head unit bolt is screwed into the female screw of the member with the female screw, and the punching unit is tightened to adjust the mounting position of the punching unit to the mounting plate. To do.

  The invention according to claim 2 is the molded sheet punching die according to claim 1, wherein the bolt with the head is screwed in via a metal washer.

  A third aspect of the present invention is the molded sheet punching die according to the second aspect, wherein a cushioning material made of rubber or resin is interposed between the washer and the punching unit.

  According to a fourth aspect of the present invention, the female threaded member is formed through the female screw, and the fixing of the female threaded member to the mounting plate is opposite to the surface of the mounting plate on which the female threaded member is mounted. The molded sheet according to any one of claims 1 to 3, wherein a fixing screw member is passed through the mounting plate from the side surface and screwed into a female screw of the female threaded member. It is a punching die. .

  Since the present invention has the above-described configuration, when the punching unit is attached to the mounting plate by screwing the bolt with the head into the female screw of the member with the female screw, it is as follows. The punching unit is arranged on the mounting plate so that the female threaded member is inserted into the through hole. At this time, a gap is maintained between the inner peripheral surface of the through hole and the outer peripheral surface of the member with the female screw by the mounting position adjusting means. Therefore, the punching unit can adjust its planar position on the mounting plate by the amount of this gap. That is, by this adjustment, the punching blade of the punching unit can be adjusted to match the position to be cut of the molded sheet.

  In the present invention, the following points are important. In the present invention, when the punching unit is disposed on the mounting plate, among the peripheral edges of the through hole, the back surface facing the mounting plate side, and the corners of the back surface and the inner peripheral surface of the through hole are formed on the female threaded member. Even if a collision occurs, it is possible to prevent the occurrence of problems such as deformation of the screw thread and damage to the screw thread. That is, when the bolt is erected on the mounting plate as in the prior art, when the back surface or the like facing the mounting plate in the punching unit hits the bolt, the bolt is deformed or the screw is placed on the outer peripheral surface. Since there is a problem that the screw thread is damaged because it is exposed, the present invention can prevent such a problem from occurring. Thus, in the present invention, when the head-attached bolt is screwed into the female screw of the female screw-attached member, the trouble that the screwing cannot be smoothly performed or the screwing itself is hindered can be prevented. In addition, it is preferable to screw a bolt with a head into a member with a female screw at a plurality of locations in each of the punching units. This is because in the case of one place, the punching unit rotates around the screw and the position tends to go wrong, whereas in the case of two places or more, such rotation can be easily prevented.

  The punching unit that requires adjustment of the position is usually a punching unit for punching a tray part located at the outer peripheral edge (or the part near the outer peripheral edge) of the molded sheet, but not all of them. This is because, in a molded sheet having a large number of trays (parts) connected vertically and horizontally, it is the part of the tray located at the outer peripheral edge that is susceptible to warping, shrinkage, etc. This is because it has been found empirically. For this reason, it is only necessary to have a mounting position adjusting means capable of adjusting the mounting position of the punching unit which is likely to cause such a problem. However, in the present invention, the mounting positions of all punching units may be adjusted. In the punching unit whose position can be adjusted, a unit that punches one tray part may constitute a unit (unit), or a unit that punches a plurality of tray parts may constitute a unit.

  Moreover, it is preferable to screw in through a washer as described in claim 2, and particularly preferably, a buffer material is interposed as described in claim 3. This is because the punching unit is often composed of a substrate made of wooden plywood, excluding the punching blade. On the other hand, when such a plywood is directly tightened by the head of the bolt, it is likely to be subjected to compressive deformation (plastic deformation), to cause relaxation, and stable fixing cannot be obtained. On the other hand, such a problem is solved by making it as described in Claim 2 or 3. In addition, as a means to fix a member with a female screw to a mounting plate, if both can be welded, it is good also by welding, However, By making it as described in Claim 4, simplification of fixation is achieved. .

  DESCRIPTION OF EMBODIMENTS Embodiments embodying the present invention will be described in detail with reference to FIGS. FIG. 1 is an enlarged plan view showing a part of a molded sheet punching die 1 according to the present embodiment and a single punching unit 11 which is a part thereof. This molded sheet punching die 1 is for punching a rectangular tray T whose upper side is open as shown in FIG. FIG. 3 shows a molded sheet S before such a tray T is punched out, and a large number of trays T are integrally formed in a form that is vertically and horizontally connected by vacuum forming or the like. However, such a molded sheet S has a rectangular frame portion that forms a scrap with a predetermined width at the boundary between the portions forming the tray T, and in the punched state as a whole, it becomes a lattice-like scrap. .

  Each punching unit 11 constituting the molded sheet punching die 1 in the present invention has one punching blade formed so as to punch one tray T, and a plurality of punching units 11 formed so as to punch a plurality of trays. However, in the following embodiment, the punching unit 11 having one punching blade is arranged vertically and horizontally on the mounting plate 21 in order to simplify the description. It is assumed that it is attached to. In the state in which the punching unit 11 is attached to the mounting plate 21, a slight gap exists between the punching units 11 for the purpose of position adjustment. Hereinafter, since each punching unit 11 is the same, it demonstrates based on the one.

  That is, as shown in FIG. 1, the molded sheet punching die 1 in this embodiment includes a punching unit 11 formed so as to punch one tray on a rectangular flat mounting plate (for example, a thin iron plate) 2. It is arranged and mounted in a grid pattern at a predetermined pitch vertically and horizontally. And it forms so that the site | part of each adjacent tray T in the shaping | molding sheet S may be punched by the punching blade 31 provided in each punching unit 11. FIG. However, in this embodiment, as described above, a predetermined interval (for example, 10 to 20 mm) exists between the punching blades 31 in each punching unit 11. Between the trays T, as described above, lattice-shaped scrap having a width of the predetermined interval is punched and formed.

  In this embodiment, the punching unit 11 includes a substrate 13 formed in a rectangle that is slightly larger than a rectangle corresponding to the outline of one tray T in a plan view, and a punching blade 31 embedded inside the outer peripheral surface of the substrate 13. It consists of what was erected and arranged in a shape (see FIGS. 1, 4 and 5). However, as shown in FIGS. 4 and 5, the substrate 13 is formed by laminating two plywoods (veneer plates) 13a and 13b each having a thickness of about 15 mm and fixing them by bonding and bolting (not shown). It is. Further, the punching blade 31 is composed of a Thomson blade that is bent so as to coincide with the rectangular outline of the tray T in a plan view on the upper surface 15 of the substrate 13. It is provided on the planting shape so as to protrude upward. That is, the cutting edge portion is exposed to a predetermined height, and the molded sheet is punched out. In addition, one end side (FIG. 4, FIG. 5 lower side) in this punching blade 31 is the surface and the back surface 17 of the board | substrate 13 so that the appropriate place may contact | abut the surface (FIG. 4, FIG. 5 upper surface) 23 of the mounting plate 21. It is said to be one. Further, a rubber member 41 is provided in a frame shape by bonding or the like on a portion of the upper surface 15 of the substrate 13 along the outside of the punching blade 31, that is, a portion between the punching blades 31 in adjacent punching units. ing. This is because a portion between the punching blades 31 forms a scrap by punching the molded sheet, and the scrap is pushed out by the elasticity of the rubber member 41 in the punching.

  On the other hand, the punching unit 11 having such a punching blade 31 is mounted on the mounting plate 21 as shown in FIGS. That is, in the present embodiment, the position of each punching unit 11 on the upper surface 23 of one rectangular mounting plate 21 is inside the punching blade 31 on the substrate 13 and is the plane of the punching blade 31. As seen, a member 51 with a female screw in which a female screw 50 is formed is positioned at the position (two locations) corresponding to the central portion of both opposing short sides of the punching blade 31a forming the short side. Installed vertically and fixed. The female threaded member 51 of this embodiment is formed such that the female screw 50 penetrates the member 51 in the axial direction of the screw. On the other hand, a through hole 27 having a diameter larger than that of the screw 50 is provided in a portion corresponding to the female screw 50 in the mounting plate 21 in a dish shape from the back surface (lower surface of FIGS. 4 and 5) 25. From the back surface 25 side, the fixing screw member, for example, a flat screw 61 is fixed by screwing it into the lower part of FIG. 4 of the female screw 50 in each female screw member 51.

  On the other hand, in the substrate 13 constituting the punching unit 11, the female screw member 51 holds a predetermined gap on the outer peripheral surface of the above-described female screw member 51, which should be positioned at the axial line portion of the female screw 50. A through-hole 19 is formed as an insertable part. The height of the female threaded member 51 is set smaller than the depth of the through hole 19, that is, the thickness of the substrate 13 constituting the punching unit 11.

  Thus, the punching unit 11 is attached to the attachment plate 21 as follows (see FIG. 6). That is, each punching unit 11 is disposed at a predetermined position on the mounting plate 21 to which the female threaded member 51 is mounted, and the female threaded member 51 is inserted (inserted) into the through hole 19 in the substrate 13. (See the lower diagram in FIG. 6). In this state, the head-attached bolt 71 is screwed into the female screw 50 of the female-threaded member 51. However, in this embodiment, at the time of this screwing, a metal annular washer (plain washer) 81 is interposed at the neck of the bolt 71, and between this washer 81 and the upper surface 15 of the substrate 13, for example, rubber or A cushioning material 85 made of resin and having an annular shape with a constant thickness is interposed. Under this condition, the punch unit 11 is attached to the mounting plate 21 as shown in FIGS. 4 and 5 by screwing the bolt 71 and tightening the punch unit 11. The outer diameter of the washer 81 is larger than the inner diameter of the through hole 19, and the outer diameter of the cushioning material 85 is set larger than the outer diameter of the washer 81, and the punching unit 11 moves in the radial direction of the through hole 19. Even if the inner peripheral surface comes into contact with the outer peripheral surface of the female threaded member 51, the bolt 71 can tighten the punching unit 11 by tightening the substrate 13 to the mounting plate 21 via the washer 81.

  In such a mounting structure, each punching unit 11 is placed at a predetermined position on the mounting plate 21 and the female screw member 51 is inserted into the through hole 19. The gap between the inner peripheral surface of the through-hole 19 and the outer peripheral surface of the female threaded member 51 can be moved laterally in any direction on the plane along the upper surface 23 of the mounting plate 21. That is, each punching unit 11 can adjust its mounting position on the mounting plate 21 by the gap. For this reason, when each punching unit 11 is attached to the mounting plate 21, the position of the punched sheet S is adjusted so that a desired punching can be performed on the molded sheet S corresponding to an error occurring for each specific lot. After that, the two bolts 71 are screwed (tightened) into the female screw 50 of each female screw member 51 fixed on the mounting plate 21. By doing so, the attachment can be performed while adjusting the attachment position.

  On the other hand, in this embodiment, when the punching unit 11 is disposed at a predetermined position on the mounting plate 21, the back surface (back surface of the substrate) 17 of the unit 11 or the back surface 17 and the inner peripheral surface of the through hole 19 are formed. The corner may collide with the female threaded member 51. However, even if it collides in this way, in the collision, it only collides with the upper part or outer peripheral surface of the member 51 with a female screw. That is, in this embodiment, unlike the conventional case where the bolt is erected on the mounting plate 21, the screw 50 in the female threaded member 51 is not exposed on the outer peripheral surface. However, the screw 50 of the female threaded member 51 is not damaged. Therefore, it is possible to reliably prevent the tightening of the punching unit 11 from being hindered in the screwing operation when the punching unit 11 is attached to the mounting plate 21. Moreover, in this embodiment, a metal washer 81 is interposed under the head 73 of the head-equipped bolt 71 (the neck) so that the washer 81 presses the upper surface 15 of the substrate 13. A buffer material 85 is disposed between the upper surface 15 of the substrate 13 and the substrate 13. For this reason, it is possible to prevent the upper surface 15 of the substrate 13 from being damaged due to compression deformation or the like at the head portion 73 of the bolt 71, and to stably fix the punching unit 11. When the washer 81 or the like is not interposed, the inner diameter of the through hole or the size of the head portion 73 of the bolt 71 may be set so that the upper surface 15 of the substrate 13 can be pressed by the head portion 73 of the bolt 71. .

  After the punching unit 11 is positioned and fixed at a predetermined position on the mounting plate 21 as described above, the molded sheet punching die 1 is attached to the fixed plate 201 of the punching press device as shown in FIG. A face plate 221 that is placed on, mounted on, and placed on each punching unit 11 so that the molded sheet S is positioned, and is mounted on the movable platen (not shown) of the press device from above, is a punching blade 31. The desired tray T is punched out by pressing so as to be pressed against the portion corresponding to. FIG. 7 illustrates a state in which the tray T is punched upside down. In addition, as shown in FIG. 7, the part Sk between the punching blades 31 between the adjacent punching units 11 becomes scrap. When the face plate 221 is pressed, the cutting edge of the punching blade 31 bites into the molded sheet S and is pressed against the surface of the face plate 221, and the molded sheet S is cut (cut). The scrap Sk is pushed out from the upper surface 15 of the substrate 13 by the elastic action of the rubber member 41. The face plate 221 shown in FIG. 7 has a lattice shape in which portions other than the portion corresponding to the punching blade 31 are hollowed out, and when the molded sheet S is punched, the tray T fits loosely in the hollowed portion. It is said that.

  The present invention is not limited to the above-described embodiment, and can be embodied with appropriate modifications within a range not departing from the gist thereof. In the above embodiment, one punching unit 11 punches and forms one tray. However, a plurality of trays may be punched and formed. In the above embodiment, all the punching units 11 formed so as to punch and form one tray are embodied as having the attachment position adjusting means. However, in the present invention, an error is included in the molded sheet. For example, if the part that is likely to occur is, for example, a part near the outer periphery, only the punching unit that is located in the part near the outer periphery regardless of the number of punches per unit is specifically assumed to have an attachment position adjusting means. May be used. Therefore, in such a case, the punching unit for punching the portion of the tray that is located in the central portion where the error is unlikely to occur in the molded sheet may not have the attachment position adjusting means.

  The punching unit attached to the mounting plate regardless of the presence or absence of the attachment position adjusting means may be formed as one responsible for punching a plurality of trays. In the case of punching a portion of a molded sheet with few errors, it is possible to have an attachment position adjusting means as one punching unit responsible for punching a plurality of trays. Note that the number of bolts with heads that attaches to the mounting plate (such as a punching unit responsible for punching a plurality of trays) is relatively large compared to a punching unit responsible for punching a single tray ( And the corresponding number of female threaded members) may be determined according to the size of the punching unit, but is preferably as large as possible. In addition, as a member with a female thread in this invention, a commercially available nut can be substituted. Moreover, although a normal hexagon bolt is illustrated as a typical head-mounted bolt, any bolt can be used as long as it is a bolt (screw member) with a head.

The top view which expanded and showed the site | part of the shaping | molding sheet punching die of embodiment of this invention, and the one punching unit which is the part. The perspective view of the tray punched with the shaping | molding sheet punching die of FIG. FIG. 3 is an explanatory plan view illustrating a molded sheet in a state before the tray of FIG. 2 is punched out. The AA sectional view taken on the enlarged view of FIG. 1, and its principal part enlarged view. BB sectional drawing in the enlarged view of FIG. The exploded view of FIG. 4 and the figure explaining the process of attaching a punching unit to a mounting plate. The fragmentary sectional view explaining the state which positions and arranges a forming sheet in the forming sheet punching die of Drawing 1, and punches a tray.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molding sheet punching die 11 Punching unit 19 Through-hole 21 Mounting plate 31 Punching blade 50 Female screw 51 Female screw member 61 Screw (fixing screw member)
71 Bolt with head 81 Metal washer 85 Buffer material T Tray S Molded sheet

Claims (4)

A molded sheet punching die used for punching individual trays from a molded sheet formed by connecting a tray of a predetermined shape vertically and horizontally,
A plurality of punching units having punching blades formed so as to punch one or a plurality of trays are attached to a mounting plate, and when at least one of the punching units is attached to the mounting plate, In what has the attachment position adjustment means which can adjust the attachment position,
As its mounting position adjustment means,
A member with a female screw having a female screw inside is fixed to a portion of the mounting plate where the punching unit is attached, while the member with the female screw holds a gap at a portion of the punching unit corresponding to the member with the female screw. Through holes that can be inserted are formed,
When the punching unit is attached to the mounting plate, the punching unit is disposed on the mounting plate so that the female threaded member is inserted into the through hole, and the punching unit is mounted within the gap. The position is adjusted, the head unit bolt is screwed into the female screw of the member with the female screw, and the punching unit is tightened to adjust the mounting position of the punching unit to the mounting plate. Molded sheet punching die.   2. The molded sheet punching die according to claim 1, wherein the head-attached bolt is screwed through a metal washer.   The molded sheet punching die according to claim 2, wherein a rubber or resin cushioning material is interposed between the washer and the punching unit.   The female threaded member is formed so as to penetrate the female screw, and the fixing of the female threaded member to the mounting plate is performed from a surface of the mounting plate opposite to the surface on which the female threaded member is mounted. The molded sheet punching die according to any one of claims 1 to 3, wherein the fixing plate is fixed by being screwed into a female screw of the member with the female screw through the mounting plate.

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