JP2011031515A - Ruling device and counter plate therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ruling device which forms a clear ruled line on a corrugated cardboard and allows preparation of punching to be efficiently carried out, and to provide a ruled line pushing groove of a counter plate in the ruling device and a method for forming the ruled line pushing groove. <P>SOLUTION: In the ruling device, the ruled line pushing groove 52 is a groove formed by being aligned with a punching die 14 in advance and when the depth of the ruled line pushing groove 52 is expressed by (h), the width of the groove is expressed by W, the thickness of the counter plate is expressed by T and the thickness of the ruled line pushing member is expressed by (t), the groove depth (h) is in a range from h=(T-0.7) mm to (T-0.2 )mm, the groove width W is in a range from 1.5t to 5t, the difference of the dimension from the lower surface of the punching die 14 to the respective lower ends of a punching blade 50 and the ruled line pushing member 51 is in a range from 0.7 mm to -0.3 mm. The ruled line B is formed by relative vertical movement of the punching die 14 and the counter plate 16 to push the corrugated cardboard sheet S into the ruled line pushing groove 52 by the ruled line pushing member 51. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a crease device for forming a crease line for folding a corrugated cardboard sheet and a counter plate in the crease device.

  As a punching device that punches a cardboard sheet into a predetermined shape and simultaneously forms a folding ruled line to form a blank product as a material for forming a cardboard box, a press disk as an upper support disk is provided on the cardboard sheet transfer path. A punching die is attached to the lower surface of the press plate, and a counter plate made of a hard metal plate such as a stainless steel plate is attached to the upper surface of the surface plate as a lower support plate arranged opposite to the press plate. The board is lowered, and a corrugated sheet supported on the upper surface of the counter plate is punched into a predetermined shape by a punching blade provided on the lower surface of the punching die, and at the same time, a plate-like ruled pressing member provided on the lower surface of the punching die. 2. Description of the Related Art Conventionally, a cardboard sheet is pushed in to form a folding ruled line.

  Here, when the ruled pressing member provided in the punching die is configured to simply push the cardboard sheet, the cardboard sheet has elasticity with a wavy shin provided between a pair of liners. The center shin is only bent by the pressing of the pressing member, and a clear ruled line cannot be formed.

  Therefore, in the punching device as described above, as described in Patent Document 1, a ruled groove is formed in the central portion in the width direction on the upper surface of the lower counter plate, and both sides sandwiching the ruled groove are provided. When the ruled line type material which is an inclined surface inclined in the opposite direction of the upper surface of the sheet is fixed by bonding so that the ruled pressing groove faces the upper ruled pressing member, the ruled pressing member presses the cardboard sheet, The pressing portion is pushed into a crease pushing groove to make a crease.

By the way, since the ruled line type material is attached by adhesion, it is often peeled off and dropped onto a punched product due to an impact at the time of frequent punching at a high speed. At this time, many punched products are shipped to the user side in a stacked state, and when a corrugated cardboard box for packaging the product is assembled by the user, the ruled line material is mixed into the product, which causes a problem.
Further, the ruled line material is frequently replaced or replaced due to damage or wear, resulting in a problem that the cost is increased and time is required.

  Further, when creased, the crease part of the cardboard sheet rises along the upper surface of the crease line material, and the bulge part is strongly pressed downward by the crease pushing member, so that the corrugated cardboard sheet is likely to be broken or scooped. There is a problem.

  To solve this problem, for example, as described in Patent Document 2, a ruled groove is formed at a position facing the ruled member provided on the lower surface of the upper punching die on the upper surface of the counter plate. Is extremely effective.

Japanese Patent Laid-Open No. 11-115071 JP-A-9-168999

  By the way, the counter plate formed with the ruled groove in the punching device is conventionally intended for punching thin paper or thin plastic sheets and putting the ruled line, and has a corrugated medium paper in the intermediate layer. In general, when a cardboard sheet having a thickness of about 2 mm to 8 mm, rigidity and elasticity is punched and creased, a clear ruled line cannot be formed due to the relationship between the groove depth and the groove width.

  In addition, if there is a positional deviation between the groove formed in the counter plate and the crease pressing member provided in the punching die, it is impossible to make a crease with high accuracy. For example, Japanese Patent No. 3533106 discloses Since the counter plate is mounted on the upper surface of the surface plate by using the positioning method as described, it takes a lot of time to prepare for punching, and various positioning members are required to increase the cost. There is a problem of becoming.

  An object of the present invention is to use a counter plate having a ruled groove to form a ruled line capable of obtaining a clear and accurate bend on the corrugated cardboard sheet. It is to be able to accurately and efficiently prepare the work for forming and punching and ruling.

  In order to solve the above problems, in the crease device according to the present invention, a punching die having a punching blade and a crease pushing member is attached to the lower surface of the upper support plate, and is disposed oppositely below the upper support plate. A counter plate is mounted on the upper surface of the lower support plate, a ruled groove is provided at a position facing the ruled pressing member on the upper surface of the counter plate, and at least one of the upper support plate and the lower support plate is moved up and down. A punching cutting line is formed on the sheet supported by the counter plate by the punching blade, and a sheet supported by the counter plate by the ruled pressing member is pushed into the ruled pressing groove to form a ruled line for bending. In the crease forming apparatus, the sheet is a corrugated cardboard sheet, the crease pushing groove has a groove depth h, a groove width W, a counter plate thickness T, When the thickness of the pressing member is t, the groove depth h is in the range of h = (T−0.7) mm to (T−0.2) mm, and the groove width W is W = 1.5t to 5t. The difference in dimension from the lower surface of the punching die to the lower ends of the punching blade and the ruled pressing member is in the range of 0.7 to (−0.3) mm, and the counter plate is placed on the lower support plate. A configuration that allows direct mounting was adopted.

  In order to solve the above-mentioned problems, in the counter plate according to the present invention, a punching die having a punching blade and a ruled pressing member is attached to the lower surface of the upper support plate, and the counter plate is disposed below the upper support plate. A counter plate is mounted on the upper surface of the lower support plate, a ruled groove is provided on the upper surface of the counter plate so as to face the ruled pressing member in the vertical direction, and at least one of the upper support plate and the lower support plate is moved up and down. And forming a cutting line on the sheet supported by the counter plate by the punching blade, and pressing the sheet supported by the counter plate by the ruled pressing member into the ruled groove to form a ruled line for bending. In the counter plate in the crease device as described above, the sheet is a corrugated cardboard sheet, the crease pushing groove has a groove depth h, and a groove Is W, the thickness of the counter plate is T, and the thickness of the crease pressing member is t, the groove depth h is in the range of h = (T−0.7) mm to (T−0.2) mm. The configuration in which the groove width W is in the range of W = 1.5t to 5t is adopted.

  Here, in any of the above inventions, the relative positional relationship between the counter plate positioned and fixed on the upper surface of the lower support plate and the punching die positioned and fixed on the lower surface of the upper support plate By adopting a configuration in which a position corresponding to the position of the ruled pressing member of the punching die is indexed on the upper surface of the counter plate and the ruled groove is formed at the indexed position, the punching die and the counter plate are adopted. Is set in the apparatus, the ruled pressing member and the ruled pressing groove can be accurately opposed vertically.

  In this case, the counter plate is positioned and fixed on the upper surface of the lower support plate, the punching die is positioned and fixed on the lower surface of the upper support plate, and the lower support plate and the upper support plate are moved closer to each other. The punching blade may be pressed against the counter plate by relative movement to form a punching cutting line corresponding portion, and a position corresponding to the position of the ruled pressing member may be determined from the punching cutting line corresponding portion.

  Alternatively, the counter plate is positioned and fixed on the upper surface of the lower support plate, the punching die is positioned and fixed on the lower surface of the upper support plate, and the lower support plate and the upper support plate are moved closer to each other. By adopting a configuration in which a ruled pressing member is pressed against the counter plate by relative movement to form a ruled equivalent portion, and the ruled pressing groove is formed in the ruled equivalent portion, the punching die and the counter By setting the plate in the apparatus, the ruled pressing member and the ruled pressing groove can be accurately opposed to each other in the vertical direction.

  As described above, in the present invention, the depth h of the ruled groove formed in the counter plate is set to h = (T−0.7) mm to (T−0. 2) With a range of mm and a groove width W in the range of W = 1.5t to 5t with respect to the thickness t of the ruled pressing member, tearing occurs with respect to each of various thicknesses and types of corrugated cardboard sheets. In addition, it is possible to reliably form a precise ruled line with a high bending accuracy without causing a crease. Further, a dimensional difference from the lower surface of the punching die to the respective lower ends of the punching blade and the ruled pressing member is 0.7 mm to ( By setting the range to -0.3) mm, it is possible to form an accurate ruled line with higher folding accuracy without causing more tearing of the corrugated cardboard sheet.

  Further, the punching is performed on the upper surface of the counter plate from the relative positional relationship between the counter plate positioned and fixed on the upper surface of the lower support plate and the punching die positioned and fixed on the lower surface of the upper support plate. By determining the position corresponding to the position of the crease-pressing member of the mold and forming the crease-groove at that position, the crease-pressing member and the crease-protruding groove face each other accurately when punching the cardboard sheet. The punching die and the counter plate can be set in the device efficiently in a short time without incurring an increase in cost, and the crease pushing member and the crease pushing groove are accurately opposed to each other in the vertical direction. Accurate and clear ruled lines can be formed without tearing.

Schematic diagram of a punching device using a crease device according to the present invention Perspective view of arm used for preparatory work of punching device Top view of the chase with the punching die set Plan view showing the state before setting the counter plate Plan view showing counter plate set Partially cutaway front view showing the fixed state of the counter plate Sectional drawing along the VII-VII line of FIG. Sectional drawing which shows the state of the front | former stage which forms the blade mark of a punching blade in a counter plate Sectional drawing which shows the state which formed the trace of the punching blade in the counter plate Sectional view of the counter plate according to the present invention having ruled grooves (A), (B), and (C) are plan views showing stepwise the formation of ruled grooves on the counter plate. Sectional view showing the formation of ruled grooves

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the corrugated cardboard sheet S is nipped by a gripper 2 provided on the chain 1 and transferred in a direction indicated by an arrow in the figure, to a punching device 10 provided in the transfer path. It is sent.

  The punching device 10 has a press platen 11 as an upper support plate provided above the transfer path of the corrugated cardboard sheet S, and a surface plate 12 as a lower support plate arranged opposite to the press platen 11. The press platen 11 is moved up and down with respect to the surface plate 12.

  Note that it is only necessary that at least one of the press platen 11 and the surface plate 12 can be moved up and down so as to approach and separate from each other.

  A chase 13 is supported in a state of being positioned on the lower surface of the press board 11, and a punching die 14 is attached to the chase 13 in a state of being detachably positioned. On the other hand, a plate 15 is supported on the upper surface of the surface plate 12, and a counter plate 16 made of a hard metal plate such as a stainless steel plate is detachably attached to the upper surface of the plate 15.

  The chase 13 is detachable along the lower surface of the press board 11 in a direction (horizontal length direction of the apparatus) perpendicular to the transport direction of the corrugated cardboard sheet S (vertical length direction of the apparatus). It is fixed in a state where it is positioned on.

  On the other hand, the plate 15 is detachable in the lateral direction of the apparatus along the upper surface of the surface plate 12 and is fixed in a state of being positioned on the upper surface of the surface plate 12 in the inserted state.

  As shown in FIG. 2, the side frame 17 of the punching device 10 is formed with openings 18 for inserting and removing the upper chase 13 and the lower plate 15, and a pair of opposed arms 19 are provided on both sides of the opening 18. Yes. In FIG. 2, only one arm 19 is shown, and the other arm 19 is omitted.

  Supporting inner surfaces of the pair of arms 19 support a plurality of rotatable rollers 20 that serve as lead-out guide paths for the chase 13, and central portions on both sides of the chase 13 that are drawn out from the openings 18 along the rollers 20. A chase reversing shaft 21 that rotates is provided, and the chase 13 is rotated 180 degrees around the chase reversing shaft 21 so that the upper and lower sides are reversed. In addition, a rail 22 serving as a lead-out guide path for the plate 15 is fixed to the opposing inner surface of each arm 19.

  FIG. 3 shows a state in which the chase 13 pulled out from the opening 18 along the roller 20 is reversed by the rotation of the chase reversing shaft 21 and turned upside down. The upper surface of the chase 13 in the inverted state is formed with a recess 23 that can accommodate the punching die 14, and the punching die 14 accommodated in the recess 23 has a transfer direction of the cardboard sheet S and a transfer direction thereof. In this positioning state, the screw 26 is fixed by tightening a screw 26 screwed into the chase 13.

  When positioning the punching die 14 with respect to the chase 13, here, a positioning protrusion 24 is provided on one side surface of the outer periphery of the punching die 14, and the positioning protrusion 24 is fitted into a positioning recess 25 formed on one side surface 23 a of the recess 23. Thus, one end surface of the positioning protrusion 24 is abutted with the end surface of the positioning recess 25, and one side surface of the outer periphery is abutted with one side surface 23 a of the recess 23.

  FIG. 4 shows a state in which the lower plate 15 is pulled out from the opening 18 along the rail 22 and the counter plate 16 is supported on the upper surface thereof. The counter plate 16 is positioned with respect to the plate 15 in two directions: a direction in which the cardboard sheet S is transferred and a direction perpendicular to the direction in which the cardboard sheet S is transferred.

  When positioning the counter plate 16, here, a front positioning pin 27 protrudes upward at the center of the upper surface of the front portion of the plate 15 in the insertion direction, which is the lateral direction of the device, and the front positioning pin 27 An insertion hole 29 is formed in each of the pair of rectangular positioning blocks 28 fixed to both sides of the counter plate. On the other hand, a U-shaped cutout 30 is provided at the center of the front portion of the counter plate 16 in the insertion direction. A pair of positioning projections 31 are provided on both sides of the portion 30, and the front portion of the counter plate 16 in the insertion direction is obtained by fitting the notch 30 to the front positioning pin 27 and fitting the positioning projection 31 to the insertion hole 29. Is positioned. Note that the positioning protrusion 31 is formed by partially cutting off both sides thereof.

  Also, as shown in FIG. 5, a rear positioning pin 32 protrudes upward at the center of the upper surface of the rear part of the plate 15 in the insertion direction, while a positioning hole is provided in the central part of the rear part of the counter plate 16 in the insertion direction. 33 is provided, and the rear portion of the counter plate 16 in the insertion direction is positioned by fitting the positioning hole 33 to the rear positioning pin 32.

  The counter plate 16 is fixed to the plate 15 by the fixing means 40 shown in FIGS. 6 and 7 in the positioning state. The fixing means 40 is provided with a pair of protrusions 41 on the rear lower surface of the plate 15 in the insertion direction with a gap in the width direction of the plate 15, and the lower surfaces 42 of the pair of protrusions 41 are tapered surfaces. The U-shaped clamp tool 43 set so as to straddle the upper surface of the rear part in the insertion direction of the counter plate 16 is moved toward the protrusion 41 by tightening the bolt 44 screwed into the protrusion 41, and the clamp tool 43 The counter plate 16 is pressed against and fixed to the upper surface of the plate 15 by the action of the taper surface 45 formed on the lower inner surface pressing the taper surface 42 of the protrusion 41.

  As shown in FIG. 8, on the lower surface of the punching die 14, a punching blade 50 for punching so as to form a punching cutting line of a predetermined shape on the corrugated cardboard sheet S, and a product portion formed inside the punching cutting line are provided. On the other hand, a plate-like ruled pressing member 51 for forming a ruled line for bending is provided.

  On the other hand, on the upper surface of the counter plate 16, a ruled groove 52 is formed at a position facing the ruled pressing member 51 provided on the punching die 14, as shown in FIG. The ruled groove 52 is a groove formed by previously aligning with the punching die 14.

  The formation of the ruled groove 52 will be described below. First, as shown in FIG. 3, the punching die 14 is placed on the upper surface of the chase 13 with the chase 13 pulled out from the opening 18 and turned upside down. Then, after the punching die 14 is positioned on the chase 13 in two orthogonal directions as described above, it is fixed to the chase 13 by tightening the screws 26.

  After positioning and fixing the punching die 14, the chase 13 is rotated 180 ° about the chase reversing shaft 21 that supports the central portion of the chase 13 to turn upside down so that the punching die 14 faces downward. It is inserted into the inside from the opening 18 to the top of the transfer path, and a punching state is obtained.

  Next, as shown in FIG. 4, the plate 15 is pulled out from the opening 18, and the counter plate 16 with the upper and lower surfaces shown in FIG. As shown in FIG. 5, after the counter plate 16 is positioned in the longitudinal direction and the lateral direction of the apparatus, the counter 15 is attached to the plate 15 by attaching the clamp tool 43 as shown in FIGS. The plate 16 is fixed. After the fixing, the counter plate 16 integrated with the plate 15 is inserted into the corrugated cardboard sheet S from the opening 18 to the inside.

  The operation for forming the ruled groove 52 as described above is the same as the operation for setting the punching die 14 and the counter plate 16 in the punching device 10 when punching the cardboard sheet S. Thus, the punching die 14 and the counter plate 16 are set in the punching device 10 in a state where the punching die 14 and the counter plate 16 are positioned in two orthogonal directions. Therefore, the punching state is maintained accurately.

Prior to the setting at the time of punching, the punching die 14 and the counter plate 16 are positioned in advance as described above to ensure the relative positional relationship between the punching die 14 and the counter plate 16, and then the press platen 11 is set. Lower. 9, the punching blade 50 longer than the ruled pressing member is strongly pressed against the counter plate 16 as shown in FIG. 9, so that the upper surface of the counter plate 16 corresponds to the punching cutting line A as shown in FIG. The blade trace 60 as a part is formed.
In forming the blade trace 60, it is only necessary to move at least one of the upper support plate (press plate 11) and the lower support plate (surface plate 12) toward each other.

  After forming the blade trace 60 on the counter plate 16, the counter plate 16 is taken out from the plate 15, and the position and length of the ruled groove 52 on the counter plate 16 are determined as follows.

  A relative position from a predetermined position of a punching cutting line by the punching blade 50 to a ruled line by the ruled pressing member 51 in a blank product obtained by punching into a predetermined shape and forming a ruled line designed according to an order from a customer; The length of the ruled line is determined in advance on the basis of an appropriately set 0 point on the X axis and an appropriately set 0 point on the Y axis that is orthogonal thereto.

  Further, the punching die 14 is also designed according to the blank product, and the punching die 50 is attached to the punching die 14 at a position corresponding to the punching cutting line, and the ruled pressing member 51 is attached to a position corresponding to the ruled line. The positional relationship between the punching blade 50 and the ruled pressing member 51 in the punching die 14 and the length thereof are determined in advance on the basis of the X axis and the Y axis as described above.

  Therefore, if the reference position at the position of the punching cutting line or the position of the punching blade 50 can be specified, the position from the reference position to each ruled line or the position to each ruled pressing member 51 can be determined.

  On the surface of the counter plate 16, a reference line (X-axis direction reference line) that is a zero point extending in the transfer direction of the corrugated cardboard sheet S and a reference line (Y-axis direction reference line) that is a zero point extending in a direction perpendicular thereto are appropriately used. If determined, the respective positions in the orthogonal X-axis and Y-axis directions from the specified X-axis direction reference line and the Y-axis direction reference line to the blade trace 60 corresponding to the punched cutting line can be obtained.

  As described above, the relative position from the predetermined position of the punching cutting line to the ruled line in the blank product and the length of the ruled line are determined in advance according to the order from the customer. Based on the reference position of the blade trace 60 as the corresponding punching and cutting line equivalent portion, the X-axis and Y-axis orthogonal from the X-axis direction reference line and the Y-axis direction reference line to the ruled groove 52 corresponding to the ruled line Each position in the axial direction and the length of the ruled groove 52 can be determined.

  On the surface of the counter plate 16, the ruled groove 52 is cut by an end mill or the like at a position and length opposite to the indexed upper ruled member 51 in the vertical direction. FIG. 11C shows the counter plate 16 in a state in which the ruled groove 52 is formed and the blade trace 60 as a portion corresponding to the punching cutting line remains.

  After setting the punching die 14 from which the punching blade 50 longer than the ruled pressing member 51 is removed and the counter plate 16 positioned in the two orthogonal directions in the same manner as described above, the press board 11 is lowered. Then, the ruled pressing member 51 is pressed against the counter plate 16 to form a trace of the ruled pressing member 51 corresponding to the ruled pressing groove 52 on the upper surface of the counter plate 16, that is, a ruled portion corresponding to the ruled pressing member 51. The ruled groove 52 may be cut by an end mill or the like on the ruled portion.

  As described above, after aligning with the punching die 14 in advance, the crease pressing groove 52 is formed on the upper surface of the counter plate 16, so that the punching die 14 is perpendicular to the chase 13 as shown in FIG. The chase 13 is pushed in and set on the lower surface of the press board 11, and the counter plate 16 is positioned on the upper surface of the plate 15 in two orthogonal directions as shown in FIGS. By attaching the plate 15 and setting the plate 15 on the upper surface of the surface plate 12, the counter plate 16 has a ruled pressing groove 52 formed on the upper surface of the counter plate 16 on the upper and lower sides of the ruled pressing member 51 provided on the punching die 14. It is set as the exact positioning state facing.

  In this way, the counter plate 16 can obtain an accurate positioning state in which the ruled groove 52 is vertically opposed to the ruled pressing member 51 provided in the punching die 14 by a simple operation of positioning and pushing the counter plate 16 into the plate 15. Therefore, preparation for the punching operation can be efficiently performed in a short time.

  When the press platen 11 is lowered after the punching die 14 and the counter plate 16 are set, the punching blade 50 pierces the corrugated cardboard sheet S stopped on the counter plate 15 as shown in FIG. A is formed, and the ruled pressing member 51 presses the cardboard sheet S against the ruled pressing groove 52, so that a folding ruled line B is formed on the cardboard sheet S.

  Here, as the plate-like ruled pressing member 51 for forming the ruled line B, four types of thicknesses of 0.9 mm, 1.4 mm, 2.0 mm, and 3.0 mm are preferably used. A wide range from thinner to thicker ones is used, and the depth of the ruled pressing groove 52 and the groove width corresponding to the thickness direction of the ruled pressing member 51 are too large for each ruled pressing member 51, or If it is too small, the following problems occur.

  The corrugated cardboard sheet S is thick and has rigidity and elasticity. Depending on the type and combination of paper in each layer, the corrugated sheet S may be easy to form the ruled line B, difficult to form, and easy to tear or difficult to tear. For this reason, for example, when the depth of the crease pressing groove 52 becomes excessively shallower than necessary, the crease portion of the corrugated cardboard sheet S pushed into the crease pushing groove 52 by the pushing of the crease pushing member 51 is moved into the crease pushing groove 52 As a result, it becomes impossible to form well and clear ruled lines B cannot be formed.

  Further, since the counter plate 16 preferably has a thickness of about 0.8 mm to 1.5 mm, if the depth of the ruled groove 52 is excessively deeper than necessary, the formation of the ruled groove 52 is formed. When the counter plate 16 is handled, there is a risk that the portion where the ruled groove 52 is formed is bent or deformed.

  Furthermore, the corrugated cardboard sheet S may be deeply pushed into the ruled groove 52 and torn.

  On the other hand, when the groove width of the ruled groove 52 is larger than necessary, the crease portion of the corrugated cardboard sheet S cannot be formed satisfactorily by the ruled groove 52, and a clear ruled line B cannot be formed. The ruled line B that is too wide may be formed, and it may not be possible to obtain accurate bending.

  Further, when the groove width of the crease pressing groove 52 is smaller than necessary, the crease portion of the cardboard sheet S is torn.

  Therefore, in order to solve the above problems, as shown in FIG. 10, the depth of the ruled groove 52 is h, the width of the groove is W, the thickness of the counter plate 16 is T, and the thickness of the ruled member 51. When the thickness is t, the depth h is in the range of h = (T−0.7) mm to (T−0.2) mm, and the groove width W is W = 1.5t to 5t. Experiments have shown that the range is optimal.

  By setting the depth h and the groove width W of the ruled groove 52 to the above dimensions, the ruled portion of the corrugated cardboard sheet S can be satisfactorily formed by the ruled pressing member 51 and the ruled groove 52. Since the clear ruled line B can be creased, it is possible to perform accurate folding at the ruled line B part.

  As shown in FIG. 12, the length from the lower surface of the punching die 14 to the lower end of the ruled pressing member 51 is made shorter than that of the punching blade 50, and the cardboard sheet S is moved by the ruled pressing member 51 when the punching die 14 is lowered. In the pushed state, the dimension difference L between the lower end of the ruled pressing member 51 and the upper surface of the counter plate 16, that is, the length of each of the punching blade 50 and the ruled pressing member 51 toward the counter plate 16 is 0.3 to 0.3. The size is set to a range of 0.7 mm, but in the case where the width dimension is small and it is difficult to bend along the ruled line B, such as a glue flap of a cardboard box, The length of the ruled pressing member 51 toward the counter plate 16 is set to be longer than that of the punching blade 50 so that the lower end of the member 51 enters the ruled pressing groove 52 about 0.3 mm below the upper surface of the counter plate 16. Comb, may be slamming the corrugated cardboard sheet S.

  Further, depending on the thickness of the corrugated cardboard sheet S and the type of paper, there are cases where it is desired to push the sheet pressing groove 51 strongly or weakly with the sheet pressing member 51, and the dimensional difference between the punching blade 50 and the sheet pressing member 51 is appropriately set. do it. Therefore, if the dimensional difference from the lower surface of the punching die 14 to the lower ends of the punching blade 50 and the ruled pressing member 51 is appropriately set within a range of 0.7 mm to (−0.3) mm, a clear and appropriate ruled line B is obtained. It was also found through experiments that the sheet can be accurately folded at the ruled line B without breaking the cardboard sheet S.

  When the ruled pressing member 51 having a length toward the counter plate 16 longer than the punching blade 50 is provided, the ruled pressing member 51 is once removed from the punching die 14 and the blade trace 60 is formed on the upper surface of the counter plate 16. What is necessary is just to form.

11 Press board (upper support board)
12 Surface plate (lower support plate)
14 Punching die 16 Counter plate 50 Punching blade 51 Ruled pressing member 52 Ruled pressing groove S Corrugated cardboard sheet

Claims (8)

A punching die having a punching blade and a crease pressing member is attached to the lower surface of the upper support plate, and a counter plate is attached to the upper surface of the lower support plate arranged opposite to the upper support plate. A ruled groove is provided at a position facing the ruled member in the vertical direction, and at least one of the upper support plate and the lower support plate is moved up and down to form a punching cutting line on the sheet supported by the counter plate by the punching blade. In the crease forming apparatus, the sheet supported by the counter plate by the crease pushing member is pushed into the crease pushing groove to form a crease line.
When the sheet is a corrugated cardboard sheet, the ruled groove has a groove depth h, a groove width W, a counter plate thickness T, and a ruled member thickness t. h = (T−0.7) mm to (T−0.2) mm, groove width W is set to W = 1.5 t to 5 t, and the punching blade and ruled press from the lower surface of the punching die A crease forming apparatus characterized in that a dimensional difference to each lower end of a member is in a range of 0.7 to (−0.3) mm, and the counter plate can be directly mounted on a lower support plate.   From the relative positional relationship between the counter plate positioned and fixed on the upper surface of the lower support plate and the punching mold positioned and fixed on the lower surface of the upper support plate, the upper surface of the counter plate The position corresponding to the position of the punching die ruled pressing member is indexed, the ruled pressing groove is formed at the indexed position, and when the punching die and the counter plate are set in the apparatus, the ruled pressing member and the The crease forming apparatus according to claim 1, wherein the crease pushing grooves are opposed to each other accurately in the vertical direction.   The counter plate is positioned and fixed on the upper surface of the lower support plate, the punching die is positioned and fixed on the lower surface of the upper support plate, and relative to the approaching direction of the lower support plate and the upper support plate. The punching blade is pressed against the counter plate by a simple movement to form a punching cutting line corresponding portion, and a position corresponding to the position of the ruled pressing member is determined from the punching cutting line corresponding portion. Crease device.   The counter plate is positioned and fixed on the upper surface of the lower support plate, the punching die is positioned and fixed on the lower surface of the upper support plate, and relative to the approaching direction of the lower support plate and the upper support plate. When the ruler pressing member is pressed against the counter plate by a simple movement to form a ruled portion, the ruled groove is formed in the ruled portion, and the punching die and the counter plate are set in the apparatus. 2. The crease forming apparatus according to claim 1, wherein the crease pressing member and the crease pressing groove are accurately opposed vertically. A punching die having a punching blade and a crease pressing member is attached to the lower surface of the upper support plate, and a counter plate is attached to the upper surface of the lower support plate arranged opposite to the upper support plate. A ruled groove is provided at a position facing the ruled member in the vertical direction, and at least one of the upper support plate and the lower support plate is moved up and down to form a punching cutting line on the sheet supported by the counter plate by the punching blade. In the counter plate in the crease device in which a sheet supported by the counter plate by the crease pushing member is pushed into the crease groove to form a crease line for folding,
When the sheet is a corrugated cardboard sheet, the ruled groove has a groove depth h, a groove width W, a counter plate thickness T, and a ruled member thickness t. A counter plate in a ruler, wherein h = (T−0.7) mm to (T−0.2) mm and the groove width W is in a range of W = 1.5 t to 5 t.   From the relative positional relationship between the counter plate positioned and fixed on the upper surface of the lower support plate and the punching mold positioned and fixed on the lower surface of the upper support plate, the upper surface of the counter plate The position corresponding to the position of the punching die ruled pressing member is indexed, the ruled pressing groove is formed at the indexed position, and when the punching die and the counter plate are set in the apparatus, the ruled pressing member and the 6. A counter plate in a crease forming apparatus according to claim 5, wherein the crease pushing grooves face each other accurately in the vertical direction.   The counter plate is positioned and fixed on the upper surface of the lower support plate, the punching die is positioned and fixed on the lower surface of the upper support plate, and relative to the approaching direction of the lower support plate and the upper support plate. The punching blade is pressed against the counter plate by a simple movement to form a punching cutting line equivalent portion, and a position corresponding to the position of the ruled pressing member is indexed from the punching cutting line equivalent portion. Counter plate in the crease device.   The counter plate is positioned and fixed on the upper surface of the lower support plate, the punching die is positioned and fixed on the lower surface of the upper support plate, and relative to the approaching direction of the lower support plate and the upper support plate. When the ruled pressing member is pressed against the counter plate by a simple movement to form a ruled portion, the ruled groove is formed in the ruled portion, and the punching die and the counter plate are set in the apparatus. 6. The counter plate in a crease forming apparatus according to claim 5, wherein the crease pushing member and the crease pushing groove are vertically opposed to each other accurately.

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