JP6750905B2 - Blanking lower mold - Google Patents

Description

The present invention relates to a blanking lower die for punching out a blank obtained by punching a material sheet.

Conventionally, the following first to third steps are performed when a blank, which is a sheet material in a box-like expanded form, is manufactured using a flat plate punching device.

<First step>
A material sheet having a required size is supplied from a paper feeding unit of a flat plate punching device to a die cutting unit, and die cutting is performed to obtain a blank of a predetermined shape in which a box is developed. At this time, the blank punched material sheet is brought into a state in which it can be laterally fed by connecting the blank and the portion to be the scrap by the connecting portion provided at a required position.

<Second step>
Next, the material sheet that has undergone the first step is sent to the scrap removing portion of the flat plate punching device, and in this scrap removing portion, fine scraps such as holes and cut portions are removed from the material sheet.

<Third step>
Then, the material sheet that has undergone the second step is sent to the discharge portion of the flat plate punching device, and the blank is pulled out from the outer peripheral portion around the blank in the material sheet at this discharge portion. The removed blanks are stacked on a table arranged below.

A blanking die is used when the blank is pulled out in the third step. The blanking mold is composed of a blanking upper mold and a blanking lower mold which are arranged vertically so as to sandwich the material sheet conveying line. The blanking upper die has a blank pushing member for pushing the blank downward, while the blanking lower die pulls out the blank pushed downward by the blank pushing member of the blanking upper die. It has a blank punching hole. In this type of blanking die, the blank pushing member of the blanking upper die pushes the blank into the blanking hole of the blanking lower die to shear the connecting portion between the blank and the outer peripheral surplus portion. The blank is dropped through the blank punching hole (see Patent Document 1).

As a conventional blanking lower die, a blanking die having a shape similar to the outer shape of the blank and formed by laminating a plurality of plywoods having blank holes through which the blank can pass is often used. The blank punching hole is formed mainly by performing laser processing on the plywood so as to follow the shape of the blank. In the blanking lower mold having such a configuration, the inner peripheral surface (constituent wall surface) of the blank punching hole functions as a guide surface for the blank to be pulled out, so that the blank is guided well when the blank falls. The depth of the blank hole is generally set large.

As described above, since the conventional blanking lower mold is configured by laminating a plurality of laser-processed plywood to form a blank hole, a plurality of plywood is laminated and bonded. Work, work to flatten the wall surfaces of the blank holes that are vertically adjacent to each other in multiple laminated plywood so that there is no step, and work to remove the soot adhering to the laser-cut surface become. For this reason, there is a problem that a great amount of labor and time are spent, and the die weight increases, resulting in poor handling. In addition, when the blank removal operation is performed at high speed, the air inside the blank removal hole does not escape completely and the air pressure changes intricately, and this change in air pressure disturbs the alignment of the blanks and sometimes the blanks. However, there is a problem that they may stay inside the blank hole.

Therefore, a plurality of blanks made of a rectangular plywood in which blank holes are formed, a substantially cylindrical guide part, and a male screw part projecting from the upper end of the guide part are formed. A guide pin is provided, and a plurality of guide pins are vertically installed in a predetermined arrangement so as to surround the blank hole in the blank hole peripheral portion of the blank plate, and a blank falling through the blank hole is guided by the plurality of guide pins. A blanking lower mold configured as described above has been proposed (see Patent Document 2).

JP 2004-106106 A JP, 2010-30126, A

In the blanking lower mold according to Patent Document 2, when the lower mold is viewed from the side where the plurality of guide pins are vertically provided, if the lower surfaces of the plurality of guide pins are connected with a line, the blanking hole shape is matched. A plurality of guide pins are arranged so as to have a shape. In this case, since the wall surface of the blank hole and the guide surface of each guide pin are flush, the blank pulled out from the material sheet first falls while contacting the wall surface of the blank hole, then, It will drop while coming into contact with multiple guide pins. When the blank falls through the blank punching hole, the blank falls while contacting the wall surface of the blank punching hole, so the resistance due to contact with the wall surface of the blank punching hole increases and the blank can be dropped smoothly. There is a problem that you cannot do it.

The present invention has been made in view of the above problems, and allows a blank to be pulled off to be smoothly dropped, and can be easily manufactured in a short time, and a blanking bottom that can achieve weight reduction is provided. It is intended to provide a type.

The characteristic configuration of the blanking lower mold according to the present invention for solving the above-mentioned problems,
A blanking lower mold for pulling out a blank obtained by punching a material sheet,
A mold main body having a blank removal hole through which the removed blank can pass without contact,
A rod-shaped guide member joined to the mold body in an overhanging state inside the blank hole so as to come into contact with the outer peripheral edge of the blank that drops through the blank hole;
The guide member guides a blank falling through the blank hole.

According to the blanking lower die of this configuration, a rod-shaped guide member is provided so that the blank to be pulled out comes into contact with the outer peripheral edge of the blank that drops through the blank punching hole in the die body having the blank punching hole that can pass without contact. Since it is joined to the inside of the blank punching hole in a bulging state, the blank will be guided and dropped by the rod-shaped guide member without contacting the wall surface of the blank punching hole, and the blank to be dropped can be smoothly dropped. be able to. In addition, it is not necessary to laminate and bond a plurality of plywood boards having blank holes as in the past, and work for flattening the wall surface of the blank holes without unevenness or steps, or laser processing cutting Since it is not necessary to remove the soot adhering to the surface, it can be easily manufactured in a short time and the weight can be reduced.

In the blanking lower mold according to the present invention,
It is preferable that a guide member holding opening into which the guide member is fitted is formed in a portion of the mold body to which the guide member is joined.

According to the blanking lower mold of this configuration, since the guide member holding opening into which the guide member is fitted is formed at the portion of the mold body where the guide member is joined, the guide member holding opening is formed. The guide member can be easily and surely joined to the predetermined position of the die main body by fitting.

In the blanking lower mold according to the present invention,
The guide member holding opening is formed to have a width wider than the width of the inward opening and the inward opening that are opened toward the inside of the blank opening, and the blank opening is formed from the inward opening. A wide portion that is arranged at a position distant from the outside and a narrow portion that is formed with a width narrower than the width of the wide portion and that is arranged between the inward opening portion and the wide portion. ,
The guide member is a fitting end that is fitted into the guide member holding opening in a state in which the guide member is retained toward the inside of the blank hole by engaging a portion extending from the wide portion to the narrow portion, It is preferable to have a blank abutment portion projecting from the inward opening so as to be able to abut the outer peripheral edge of the blank that drops through the blank removal hole.

According to the blanking lower mold of this configuration, when the guide member is fitted into the guide member holding opening, the fitting end portion of the guide member is provided at a portion of the guide member holding opening extending from the wide portion to the narrow portion. The guide member is held in the guide member holding opening while being engaged with the inside of the blank removal hole so as not to come off, and is capable of contacting the outer peripheral edge of the blank falling through the blank removal hole. Since the guide member is held in the guide member holding opening in a state of protruding from the inward opening of the guide member holding opening, the guide member is brought into contact with the outer peripheral edge of the blank falling through the blank hole. It is possible to stably maintain the state in which the bulge protrudes inside the blank hole with a simple structure.

In the blanking lower mold according to the present invention,
An adhesive reservoir for a guide member for accumulating an adhesive for a guide member that forms an adhesive layer between the guide member holding opening and the guide member is formed on the wall surface of the guide member holding opening. It is preferably formed.

According to the blanking lower mold of this configuration, the guide member adhesive accumulating portion for accumulating the guide member adhesive forming the adhesive layer between the guide member holding opening and the guide member holds the guide member. Since it is formed on the wall surface of the opening, the adhesive for the guide member accumulated in the adhesive reservoir for the guide member ensures an adhesive layer between the wall surface of the guide member holding opening and the guide member. The mold body and the guide member can be firmly bonded to each other via the adhesive layer.

In the blanking lower mold according to the present invention,
The guide member adhesive reservoir is preferably formed in a groove shape extending along a fitting direction of the guide member into the guide member holding opening.

According to the blanking lower mold of this configuration, since the guide member adhesive reservoir is formed in a groove shape extending along the fitting direction of the guide member into the guide member holding opening, the guide member adhesive is formed. The reservoir can be easily formed, and at least the guide member adhesive retained in the guide member adhesive reservoir remains without being scraped by the operation of fitting the guide member into the guide member holding opening. Thus, the adhesive for the guide member remaining in the adhesive reservoir for the guide member can surely form the adhesive layer between the wall surface of the guide member holding opening and the guide member.

In the blanking lower mold according to the present invention,
It is preferable that the mold body is formed by connecting an upper base material and a lower base material, which are opposed to each other at a predetermined interval in the vertical direction, by a connecting member.

According to the blanking lower mold of this configuration, the mold body is configured by connecting the upper base material and the lower base material, which are opposed to each other at a predetermined interval in the up-down direction, by the connecting member, The upper base member and the lower base member connected by a member can receive a vertical load, and a space can be formed between the upper base member and the lower base member. It is possible to reduce the weight of the die body while ensuring the rigidity of the body.

In the blanking lower mold according to the present invention,
A connecting member holding opening into which the connecting member is fitted is preferably formed in a portion of the upper base material and/or the lower base material to which the connecting member is connected.

According to the blanking lower mold of this configuration, since the connecting member holding opening into which the connecting member is fitted is formed at the portion of the upper base material and/or the lower base material where the connecting member is joined, By fitting the connecting member into the member holding opening, the connecting member can be easily and surely joined to the predetermined position of the mold body.

In the blanking lower mold according to the present invention,
On the wall surface of the connecting member holding opening, there is a connecting member adhesive reservoir for storing an adhesive for connecting member that forms an adhesive layer between the connecting member holding opening and the connecting member. It is preferably formed.

According to the blanking lower mold of this configuration, the adhesive storing portion for the connecting member for storing the adhesive for the connecting member forming the adhesive layer between the opening for holding the connecting member and the connecting member holds the connecting member. Since it is formed on the constituent wall of the opening, the adhesive for the connecting member accumulated in the adhesive reservoir for the connecting member ensures an adhesive layer between the wall of the connecting member holding opening and the connecting member. Can be formed on the mold body, and the mold body and the connecting member can be firmly bonded to each other via the adhesive layer.

In the blanking lower mold according to the present invention,
It is preferable that the adhesive holding portion for the connecting member is formed in a groove shape extending along a fitting direction of the connecting member into the opening for holding the connecting member.

According to the blanking lower mold of this configuration, since the adhesive holding portion for the connecting member is formed in the groove shape extending along the fitting direction of the connecting member into the opening for holding the connecting member, the adhesive for the connecting member is formed. The reservoir can be easily formed, and at least the adhesive for the connecting member stored in the adhesive reservoir for the connecting member remains without being scraped by the fitting operation of the connecting member into the opening for holding the connecting member. As a result, the adhesive layer for the connecting member remaining in the adhesive reservoir for the connecting member can reliably form an adhesive layer between the wall surface of the connecting member holding opening and the connecting member.

In the blanking lower mold according to the present invention,
An upper end and a lower end of the upper base member and the lower base member are respectively in contact with the upper base member and the lower base member to receive a vertical load acting on the upper base member and the lower base member. Preferably.

According to the blanking lower mold of this configuration, the load receiving member that receives the vertical load acting on the upper base material and the lower base material by contacting the upper base material and the lower base material with the upper end and the lower end, respectively. Since it is fitted onto the connecting member, most of the vertical load acting on the upper base member and the lower base member is received by the load receiving member, and the load hardly acts on the connecting member in a compact configuration. You can Therefore, the connected state of the upper base member and the lower base member by the connecting member can be more stably maintained.

FIG. 1 is a vertical cross-sectional view of a main part of a blanking mold including a blanking lower mold according to an embodiment of the present invention. FIG. 2 is an overall perspective view of the blanking lower mold. 3A and 3B show the blanking lower mold, wherein FIG. 3A is a plan view, FIG. 3B is a side view, and FIG. 3C is a front view. FIG. 4 is a bottom view of the blanking lower mold. FIG. 5 is an enlarged perspective view of a main part of the blanking lower mold. FIG. 6 is an explanatory diagram of a joint structure of a guide member and a connecting member in the blanking lower mold. 7A and 7B show a slide guide device equipped in the blanking lower mold, wherein FIG. 7A is a perspective view of a mounted state and FIG. 7B is an exploded perspective view. 8A and 8B show a partitioning/guide device equipped in the blanking lower mold, FIG. 8A is a lowered state view of the movable guide piece, and FIG. 8B is a raised state view of the movable guide piece. FIG. 9: is explanatory drawing (1) of the joining method of the guide member and connection member in the same blanking lower die. FIG. 10: is explanatory drawing (2) of the joining method of the guide member and connection member in the same blanking lower die. FIG. 11 is an explanatory view (3) of a method for joining the guide member and the connecting member in the blanking lower mold. FIG. 12 is an explanatory view (4) of the method of joining the guide member and the connecting member in the blanking lower mold.

Hereinafter, the present invention will be described with reference to the drawings. However, the present invention is not intended to be limited to the embodiments described below and the configurations described in the drawings.

<Blanking type overall configuration>
The blanking die 1 shown in FIG. 1 is mounted on a discharge part of a flat plate punching device (not shown). This blanking die 1 is arranged at an upper position of a conveying line into which a material sheet 2 in which a blank 2a and an outer surplus portion 2b around the blank 2a are connected by a required connecting portion 2c is fed. An upper die 3 and a blanking lower die 4 that is arranged at a lower position of the transport line so as to face the blanking upper die 3 are configured. Below the blanking lower die 4, a table 5 which can be moved up and down at a required speed is arranged.

<Blanking upper mold>
The blanking upper die 3 is provided with a blanking upper die substrate 11 which is detachably attached to an upper frame in a discharge portion of a flat plate punching device (not shown). A blank pressing member 12 for pressing the blank 2a of the material sheet 2 downward is attached to the blanking upper mold substrate 11, and a margin pressing member 13 for pressing the outer excess portion 2b of the material sheet 2 is compressed, for example. It is attached via an elastic body 14 such as a coil spring or a resin cushion material that can obtain elastic force.

<Blanking lower type>
As shown in FIG. 2, the blanking lower mold 4 includes a mold main body 21 that constitutes a main body portion, and a plurality of guide members 22 for guiding the blank 2a.

<mold body>
As shown in FIGS. 1 and 2, in the mold body 21, a plate-shaped upper base material 23 and a lower base material 24, which are opposed to each other at a predetermined interval in the vertical direction, are connected by a plurality of connecting members 25. It will be. Thus, the upper base material 23 and the lower base material 24, which are opposed to each other at a predetermined interval in the vertical direction, and the lower base material 24 are connected by the connecting member 25 to form the mold main body 21. The vertical load can be received by the side base material 24, and a space can be formed between the upper base material 23 and the lower base material 24. This makes it possible to reduce the weight of the mold body 21 while ensuring the rigidity of the mold body 21.

As shown in FIG. 3( a ), the upper base member 23 has two blank punched holes 31 formed in one rectangular plywood plate so as to be arranged on the left and right in the drawing by, for example, thermal cutting by laser processing. It will be. On the other hand, as shown in FIG. 4, in the lower base material 24 as well as in the upper base material 23, two blank holes 32 are formed in one rectangular plywood.

Here, the blank hole 31 formed in the upper base material 23 is formed in a shape substantially similar to the outer shape of the blank 2a. On the other hand, the blank hole 32 formed in the lower base material 24 is formed in a shape that is a simplified outer shape of the blank 2a. Each of the blank holes 31 and 32 has a size such that the blank 2a to be pulled out can pass without contact. That is, when the blank 2a passes through the blank punching holes 31 and 32, a predetermined gap is formed over the entire circumference between the inner circumferential surface (constituent wall surface) of the blank punching holes 31 and 32 and the blank 2a. The shape and size of the blank holes 31, 32 for 2a are defined.

Further, as shown in FIGS. 3A and 4, the two blank punch holes 31 formed in the upper base material 23 and the two blank punch holes 32 formed in the lower base material 24 are viewed in a plan view. The blanks 2a, which are arranged in the same phase so as to overlap with each other and are pulled out from the material sheet 2, pass through the blank punching holes 31 without contact, and then pass through the blank punching holes 32 without contacting and may fall. You can do it.

<Guide member>
As shown in FIG. 5, the guide member 22 is composed of a cylindrical wooden rod-shaped member extending in the up-down direction, and is in contact with the outer peripheral edge of the blank 2a that drops through the blank punch holes 31 and 32. It is joined to the die main body 21 in an overhanging state on the inner sides of the and 32. In the blanking lower die 4, the required number (a total of 28 in this example, 28 guide members) of guide members 22 for each of the pair of upper and lower blank punching holes 31 and 32 pass through the blank punching holes 31 and 32. The blank holes 31 and 32 are arranged at appropriate intervals to each other so that they can surround the 2a in a contact state. As a result, the blank 2a pulled out from the material sheet 2 does not come into contact with the wall surfaces of the blank punching holes 31 and 32, but drops only while coming into contact with the plurality of guide members 22. In this way, it is no longer necessary to laminate and bond a plurality of plywood boards having blank holes as in the past, and work for flattening the wall surface of the blank holes without unevenness or steps or laser processing cutting Since it is not necessary to remove the soot adhering to the surface, it can be easily manufactured in a short time and the weight can be reduced.

<Fit end of guide member and blank contact part>
The guide member 22 has upper and lower fitting end portions 22a and a blank contact portion 22b. The fitting end 22a is engaged with a portion of the guide member holding opening 41, 42 described later that extends from the wide portion 46 to the narrow portion 47, so that the fitting end portion 22a does not come out toward the inside of the blank punching holes 31, 32. It is fitted in the guide member holding openings 41, 42. The blank abutment portion 22b is projected from an inward opening 45 in a guide member holding opening 41, 42 described later so as to be able to abut the outer peripheral edge of the blank 2a that falls through the blank punching holes 31, 32. The projecting surface is formed in a convex curved surface shape capable of making point contact with the outer peripheral edge of the blank 2a.

<Connecting member>
As shown in FIG. 2, similarly to the guide member 22, the connecting member 25 is also made of a cylindrical wooden rod-shaped member extending in the vertical direction. In the blanking lower mold 4, the required number (8 in this example) of the connecting members 25 are arranged at the four corners of the mold body 21 and in the middle of the corners adjacent to each other.

<Load receiving member>
As shown in FIG. 1, a load receiving member 35 made of, for example, a metal round pipe material such as aluminum, stainless steel, or iron is externally fitted to the connecting member 25. The load receiving member 35 has an upper end abutted on the upper base material 23 and a lower end abutted on the lower base material 24, respectively, and receives a vertical load acting on the upper base material 23 and the lower base material 24. Play a role. In this way, it is possible to prevent a load from acting on the connecting member 25 with a compact structure, and it is possible to more stably maintain the connected state of the upper base member 23 and the lower base member 24 by the connecting member 25.

<Joint structure of guide members>
Next, the joint structure of the guide member 22 will be described below mainly with reference to FIGS. 5 and 6.

<Opening for holding guide member>
As shown in FIG. 5, a guide member holding opening 41 into which the upper fitting end 22a of the guide member 22 is fitted is formed in a portion of the upper base member 23 where the guide member 22 is joined. .. Similarly, a guide member holding opening 42 into which the lower fitting end portion 22a of the guide member 22 is fitted is also formed in a portion of the lower base material 24 to which the guide member 22 is joined. By fitting the guide member 22 into the guide member holding openings 41 and 42, the guide member 22 can be easily and surely joined to the predetermined position of the die main body 21.

Since the guide member holding opening 41 formed in the upper base material 23 and the guide member holding opening 42 formed in the lower base material 24 have basically the same structure, In the description, the guide member holding opening 41 will be mainly described, and the guide member holding opening 41 will be described with the description of the guide member holding opening 41.

The guide member holding opening 41 is formed in the peripheral edge portion of the blank punching hole 31 formed in the upper base material 23, is opened so as to pass through the upper base material 23 in the vertical direction, and It is open toward the inside. The guide member holding opening 41 is formed by cutting out a part of a circle so that the guide member 22 can be fitted tightly except for a part in the circumferential direction at the fitting end 22a on the upper side of the guide member 22. It has a cross-sectional shape, and has a constituent wall surface that faces the outer peripheral surface of the upper fitting end 22a of the guide member 22 excluding a part in the circumferential direction.

<Inward opening, wide part, narrow part>
As shown in FIG. 6, the guide member holding opening 41 has an inward opening 45, a wide portion 46, and a narrow portion 47. The inward opening 45 is opened toward the inside of the blank hole 31. The wide portion 46 is formed to have a width wider than the width of the inward opening portion 45, and is arranged at a position away from the inward opening portion 45 to the outside of the blank hole 31. The narrow portion 47 is formed to be narrower than the wide portion 46 and wider than the inward opening portion 45, is arranged between the inward opening portion 45 and the wide portion 46, and extends from the wide portion 46. It is formed by a pair of concave curved surfaces whose width becomes gradually narrower as it goes toward the inward opening 45.

In the present embodiment, as the guide member holding opening 41, a part of a circle into which the guide member 22 fits exactly is cut out except a part of the fitting end portion 22a of the guide member 22 in the circumferential direction. Although the cross-sectional shape is exemplified, the invention is not limited to this. For example, the cross-section opened toward the inside of the blank punching hole 31 has a dovetail groove shape or the inside of the blank punching hole 31. The opening may have a convex shape.
In the case where the guide member holding opening 41 has a dovetail groove shape in cross section, the guide member holding opening 41 has an inward opening 45 opened toward the inside of the blank hole 31, and a width wider than the width of the inward opening 45. Between the wide opening 46 and the wide portion 46 arranged at a position distant from the blank opening 31 to the outside of the blank hole 31, a pair of tapered surfaces having a width gradually narrowing from the wide opening 46 toward the inward opening 45. The narrow portion 47 is formed. With respect to the shape of the guide member holding opening 41 as described above, at least the fitting end portion 22a of the guide member 22 is fitted into the guide member holding opening 41 having a dovetail cross section, and at the same time from the inward opening 45. It is formed to have a trapezoidal cross section or a triangular cross section so that a part thereof projects. There may be a mode in which the entire guide member 22 is formed of a bar-shaped member having a trapezoidal cross section or a triangular cross section and extending vertically.
On the other hand, when the guide member holding opening 41 has a convex cross-section, the guide member holding opening 41 is formed to have a width wider than the width of the inward opening 45 opened toward the inside of the blank hole 31 and the inward opening 45. The width between the wide opening 46 and the wide opening 46 located at a position separated from the inward opening 45 to the outside of the blank hole 31 is narrower than the width of the wide opening 46 and about the same as the width of the inward opening 45. The narrow portion 47 is formed. In contrast to such a shape of the guide member holding opening 41, at least the fitting end portion 22a of the guide member 22 fits into the guide member holding opening 41 having a convex cross section, and the inward opening 45 is formed. It is formed in a convex shape in cross section so that a part of it protrudes. There may be a mode in which the entire guide member 22 is formed of a rod-shaped member having a convex cross section and extending in the vertical direction.

As shown in FIG. 6, when the upper fitting end 22 a of the guide member 22 is fitted into the guide member holding opening 41, the fitting of the guide member 22 into the portion extending from the wide portion 46 to the narrow portion 47. The guide member 22 is held by the guide member holding opening 41 while the end portions 22a are engaged with each other and the guide member 22 is held toward the inside of the blank hole 31 so as not to come off, and the outer peripheral edge of the blank 2a that falls through the blank hole 31 is dropped. The guide member 22 is held in the guide member holding opening 41 in a state in which the blank contact portion 22b is capable of abutting against the inward opening 45. Therefore, the state in which the guide member 22 projects to the inside of the blank punching hole 31 so as to come into contact with the outer peripheral edge of the blank 2a that drops through the blank punching hole 31 can be stably maintained with a simple structure.

<Adhesive reservoir for guide member>
The guide member adhesive for accumulating the guide member adhesive 40 on the constituent wall surface of the guide member holding opening 41 for forming an adhesive layer between the constituent wall surface and the fitting end portion 22a of the guide member 22. A reservoir 55 is engraved. The guide member adhesive reservoir 55 is formed in a V-groove shape that extends along the direction in which the guide member 22 is fitted into the guide member holding opening 41, that is, along the direction that vertically penetrates the paper surface of FIG. There is. The required number of guide member adhesive reservoirs 55 are provided at a predetermined angular pitch (seven in this example) in the circumferential direction of the guide member holding opening 41 having a cross-sectional shape in which a part of a circle is cut out. ing. The guide member adhesive reservoir 55 is not limited to the V-shaped groove in cross section, and may be, for example, a rectangular groove in cross section or a semicircular groove in cross section.

In the present embodiment, by forming the guide member adhesive reservoir 55 on the wall surface of the guide member holding opening 41, the guide member adhesive 40 stored in the guide member adhesive reservoir 55 allows An adhesive layer can be reliably formed between the wall surface of the guide member holding opening 41 and the fitting end 22a of the guide member 22, and the die body 21 and the guide member 22 can be firmly bonded via the adhesive layer. Can be joined to. Further, since the guide member adhesive reservoir 55 is formed in a V groove shape extending along the fitting direction of the guide member 22 into the guide member holding opening 41, the guide member adhesive reservoir 55 can be easily formed. And the guide member adhesive 40 stored in the guide member adhesive storage portion 55 remains without being scraped off by the fitting operation of the guide member 22 into the guide member holding opening 41. By the adhesive 40 for the guide member remaining in the adhesive reservoir 55 for the guide member, an adhesive layer is formed between the wall surface of the guide member holding opening 41 and the fitting end 22a of the guide member 22. It can be reliably formed.

<Joining structure of connecting members>
Next, the joint structure of the connecting member 25 will be described below mainly with reference to FIGS. 1 and 4 and 6.

As shown in FIG. 1, a connecting member holding opening 61 into which the upper fitting end 25a of the connecting member 25 is fitted is formed in a portion of the upper base member 23 where the connecting member 25 is joined. .. Similarly, a portion of the lower base material 24 to which the connecting member 25 is joined is also provided with a connecting member holding opening 62 into which the lower fitting end 25a of the connecting member 25 is fitted. By fitting the connecting member 25 into the connecting member holding openings 61, 62, the connecting member 25 can be easily and surely joined to the predetermined position of the die main body 21.

Since the connecting member holding opening 61 formed in the upper base material 23 and the connecting member holding opening 62 formed in the lower base material 24 have basically the same structure, In the description, the connecting member holding opening 61 will be mainly described, and the connecting member holding opening 61 will be described with the description of the connecting member holding opening 61.

As shown in FIGS. 1 and 6, the connecting member holding opening 61 is opened so as to penetrate the upper base member 23 in the vertical direction, and the upper fitting end 25 a of the connecting member 25 is exactly aligned. It has a circular cross-sectional shape that fits in with, and has a constituent wall surface that faces the outer peripheral surface of the upper fitting end 25a of the connecting member 25.

<Adhesive reservoir for connecting members>
As shown in FIG. 6, on the constituent wall surface of the connecting member holding opening 61, a bonding member adhesive for forming an adhesive layer between the constituent wall surface and the upper fitting end 25 a of the connecting member 25. A connecting member adhesive reservoir 65 for accumulating 60 is engraved. The connecting member adhesive agent reservoir 65 is formed in a V-groove shape that extends along the direction in which the connecting member 25 is fitted into the connecting member holding opening 61, that is, along the direction that vertically penetrates the paper surface of FIG. 6. There is. The required number (eight in this example) of the connecting member adhesive reservoirs 65 are provided at a predetermined angular pitch in the circumferential direction of the guide member holding opening 61 having a circular cross-sectional shape. In addition, the adhesive reservoir portion 65 for the connecting member is not limited to the V-shaped groove of the cross section, and may be, for example, a square groove or a semicircular groove of the cross section.

In the present embodiment, by forming the connecting member adhesive reservoir 65 on the wall surface of the connecting member holding opening 61, the connecting member adhesive 60 stored in the connecting member adhesive reservoir 65 allows An adhesive layer can be reliably formed between the constituent wall surface of the connecting member holding opening 61 and the fitting end 25a of the connecting member 25, and the mold body 21 and the connecting member 25 can be firmly bonded via the adhesive layer. Can be joined to. Further, since the adhesive holding portion 65 for the connecting member is formed in a V groove shape extending along the fitting direction of the connecting member 25 into the opening 61 for holding the connecting member 61, the adhesive holding portion 65 for the connecting member can be easily formed. And at least the adhesive 60 for the connecting member stored in the adhesive reservoir 65 for the connecting member remains without being scraped by the fitting operation of the connecting member 25 into the opening 61 for holding the connecting member. By the adhesive 60 for the connecting member remaining in the adhesive reservoir 65 for the connecting member, an adhesive layer is formed between the constituent wall surface of the opening 61 for holding the connecting member and the fitting end 25a of the connecting member 25. It can be reliably formed.

By adopting the joining structure of the guide member 22 and the joining structure of the connecting member 25 as described above, the blanking die 1 can be manufactured inexpensively and easily, and the guide member 22 and the connecting member 25 can be manufactured. The joined state can be stably maintained for a long period of time.

<Adhesive for guide members, adhesive for connecting members>
As the guide member adhesive 40 and the connecting member adhesive 60, an adhesive layer can be formed between the guide member holding openings 41 and 42 and the guide member 22, and the connecting member holding opening can be formed. The type of adhesive is not particularly limited as long as an adhesive layer can be formed between 61 and 62 and the connecting member 25. However, in the method of joining the guide member 22 and the connecting member 25, which will be described later, An aqueous emulsion adhesive containing a film-forming polymer is used. Examples of the film-forming polymer include acrylic acid ester-based polymers, methacrylic acid ester-based polymers, vinyl acetate-based polymers, ethylene-vinyl acetate-based copolymers, and the like.

Next, the slide guide device 70 and the partition/guide device 80, which are provided in the blanking lower mold 4 of the present embodiment, will be described in order.

<Slide guide device>
As shown in FIG. 1, a required slide guide device 70 for guiding the blank 2a that passes through the blank punching hole 32 and falls further is provided at a predetermined position on the peripheral portion of the blank punching hole 32 in the lower base material 24. It is assembled.

<Slide guide>
As shown in FIG. 7A, the slide guide device 70 is composed of a slide guide 71 and a guide mounting member 72. The slide guide 71 includes a fixed guide portion piece 73 and a movable guide portion piece 74 that is vertically slidably incorporated into the fixed guide portion piece 73. Here, the guide surface of the fixed guide part piece 73 and the guide surface of the movable guide part piece 74 are in a flush relationship.

<Guide mounting member>
As shown in FIG. 7B, the guide mounting member 72 is composed of a horizontal member 75 and a vertical member 76. The horizontal member 75 extends in the horizontal direction along the peripheral edge of the blank hole 32 in the lower base member 24, and the vertical member 76 extends downward from the longitudinal middle portion of the horizontal member 75 so as to form a right angle with the horizontal member 75. The horizontal member 75 and the vertical member 76 extend and are formed into an external shape having a T-shape. A mounting recess 77, which is recessed in a rectangular shape so as to receive the vertical member 76 of the guide mounting member 72, is formed in the peripheral portion of the blank removal hole 32 in the lower base material 24.

In the slide guide device 70, the slide guide 71 is fixed to the vertical member 76 of the guide mounting member 72 with screws 78, the vertical member 76 is fitted into the mounting recess 77 formed in the lower base material 24, and the lower base material is provided. With the horizontal member 75 placed on the lower base material 24 along the peripheral edge of the blank hole 32 in 24, a wood screw 79 that penetrates the lower base material 24 and is screwed into both sides of the horizontal member 75. , Is fixed to the lower base material 24. The guide surfaces of the fixed guide piece 73 and the movable guide piece 74 of the slide guide device 70 thus fixed are included in the vertical planes of the adjacent guide members 22 that are in contact with the blank contact portions 22b. Therefore, the mounting position of the slide guide device 70 with respect to the lower base material 24 is determined.

<Partition and guide device>
As shown in FIGS. 3 and 4, a partition/guide device 80 is disposed at an intermediate position in the left/right direction of the mold body 21. The partition/guide device 80 partitions the blank blank holes 31 arranged side by side in FIG. 3 in the upper base material 23, and partitions the blank blank holes 32 arranged in the left and right in FIG. 4 in the lower base material 24. Eighty-one. A required locking opening 82 is provided at a portion where the partition/guide plate 81 is assembled to the upper base material 23 and the lower base material 24. On the other hand, a locking convex portion 83 is provided on the partition/guide plate 81 side so as to correspond to the locking opening portion 82, and the locking convex portion 83 is engaged with the locking opening portion 82 to upper side. By assembling the base material 23 and the lower base material 24 via the connecting member 25, the partition/guide plate 81 is locked to the upper base material 23 and the lower base material 24 and fixed to the mold body 21. It is assembled in the state.

As shown in FIG. 8( a ), the partition/guide plate 81 is formed by adhering guide face plates 85 to both plate surfaces of a plate-shaped base material 84 made of metal such as iron, aluminum or stainless steel. is there. The partition/guide plate 81 is formed with a required number (two in this example) of rectangular guide portion piece incorporating openings 86 at predetermined intervals in the longitudinal direction. A latching portion 87 is provided below the opening portion 86 for incorporating the guide portion piece in the partition/guide plate 81. A movable guide piece 88, which is formed in a rectangular plate shape that is long in the up-down direction, is formed by bending a strip-shaped plate so as to straddle the latching portion 87 and joining the ends to each other into the guide portion piece installation opening 86. It is incorporated so as to be slidable in the vertical direction by the guide of the stopper portion 87.

As the guide face plate 85, for example, a sheet made of a material such as bake, PET, paper, brass, aluminum, and stainless is used. The plate thickness of the guide face plate 85 is set to be approximately the same as the plate thickness of the strip-shaped plate that constitutes the movable guide portion piece 88, whereby the guide surface of the partition/guide plate 81 and the guide surface of the movable guide portion piece 88 are flat. The blank 2a can be smoothly guided without being caught at the boundary between the partition/guide plate 81 and the movable guide piece 88.

The upper side portion 81a of the partition/guide plate 81 is formed into a shape that is notched in a concave arc shape and has a warp. Thus, when the material sheet 2 flows in the direction orthogonal to the partition/guide plate 81, the blank 2a connected by the connecting part 2c is reliably prevented from being caught by the upper side part 81a of the partition/guide plate 81. Therefore, the feeding operation of the material sheet 2 can be performed without delay.

As shown in FIG. 8B, in the partition/guide device 80, the movable guide piece 88 raises the guide portion piece-incorporating opening 86 to a large extent, and gravity acts from the raised position. As a result, the movable guide piece 88 is lowered and hooked on the latch 87, and the lower half of the movable guide piece 88 hangs down from the lower side portion 81b of the partition/guide plate 81 as shown in FIG. 8A. It is possible to switch to the lowered position. During the operation of removing the blank 2a, it is in the lowered position shown in FIG. 8(a). In this case, the blank 2a that falls through the blank punching hole 31 of the upper base material 23 and then falls through the blank punching hole 32 of the lower base material 24 is guided by the partition/guide plate 81, and the lower base material is guided. The movable guide piece 88 guides the blank 2a that is about to fall further through the blank hole 32 of 24, and guides the blank 2a smoothly onto the table 5 (see FIG. 1) so as to be aligned. You can

<Method of joining guide member and connecting member>
Next, a method of joining the guide member 22 and the connecting member 25 will be described below mainly with reference to FIGS. 9 to 12. In the joining method described below, the water-based guide member adhesive 40 is applied to the constituent wall surfaces of the guide member holding openings 41 and 42, and the water is connected to the constituent wall surfaces of the connecting member holding openings 61 and 62. Adhesive applying step of applying adhesive 60 for members, guide member adhesive 40, guide member holding openings 41 and 42 to which adhesive 60 for connecting members is applied, and connecting member holding openings The step of fitting the guide member 22 and the connecting member 25 into the members 61 and 62 is included.

First, as shown in FIG. 9A, the guide member adhesive 40 is applied to the constituent wall surfaces of all the guide member holding openings 42 in the lower base material 24, and all the connecting member holding openings are formed. The adhesive 60 for the connecting member is applied to the constituent wall surface of the portion 62. Although not described in detail with reference to the drawings, the guide member adhesive 40 is applied to the constituent wall surfaces of all the guide member holding openings 41 on the upper base member 23 side, and all the connecting members are held. The adhesive 60 for the connecting member is applied to the wall surface of the opening portion 61 for application.

Next, as shown in FIGS. 9B to 10C, all the connecting member holding openings 62, to which the connecting member adhesive 60 is applied, are wetted with water in advance. The lower fitting end 25a is fitted. The connecting member adhesive 60 applied to the wall surface of the connecting member holding opening 62 is sprayed with water by, for example, a spray device (not shown) to wet the connecting member adhesive 60 with water. After that, the lower fitting end 25a of the normal connecting member 25 that is not particularly wet with water may be fitted into the connecting member holding opening 62.

Next, as shown in FIG. 10( d ), the connecting member 25 fitted into the connecting member holding opening 62 so that the lower end of the load receiving member 35 contacts the upper plate surface of the lower base member 24. The load receiving member 35 is fitted on the outside.

Then, as shown in FIG. 11E, the guide member adhesive 40 and the connecting member adhesive are provided on the respective constituent wall surfaces of all the guide member holding openings 41 and the connecting member holding openings 61. The upper base material 23 to which 60 is applied in advance is brought above the lower base material 24, and the upper fitting end portions 25a of the respective connecting members 25 fitted in the lower base material 24 are connected to the corresponding connection parts. The position of the upper base material 23 is determined with respect to the lower base material 24 so that the upper base material 23 can be fitted into the member holding opening 61. After the position is determined, as shown in FIG. 11F, the upper base material 23 is lowered with respect to the lower base material 24 until the upper end of the load receiving member 35 contacts the lower plate surface of the upper base material 23. The upper fitting end 25a of the connecting member 25 is fitted into each connecting member holding opening 61. In addition, the connection member adhesive 60 applied to the wall surface of the connection member holding opening 61 is sprayed with water by, for example, a spray device (not shown) to wet the connection member adhesive 60 with water. After that, the upper fitting end 25a of the normal connecting member 25, which is not particularly wet with water, may be fitted into the connecting member holding opening 61.

Then, as shown in FIGS. 12(g) to 12(h), the guides that have been previously wetted with water are provided in all the guide member holding openings 41, 42 to which the guide member adhesive 40 has been applied. The member 22 is inserted from the guide member holding opening 41 into the guide member holding opening 42, the upper fitting end 25a of the guide member 22 is fitted into the guide member holding opening 41, and the guide member is held. The lower fitting end 25a of the guide member 22 is fitted into the holding opening 42. A state in which water is sprayed on the guide member adhesive 40 applied to the wall surfaces of the guide member holding openings 41 and 42 by, for example, a spray device (not shown) to wet the guide member adhesive 40 with water. After that, the upper and lower fitting end portions 25a of the normal guide member 22 not particularly wet with water may be fitted into the guide member holding openings 41 and 42.

In this manner, the water-based guide member adhesive 40 is applied to the constituent wall surfaces of the guide member holding openings 41 and 42, and the water-based connecting member adhesive 60 is applied to the constituent wall surfaces of the connecting member holding openings 61 and 62. After the application, the step of fitting the connecting member 25 into the connecting member holding openings 61 and 62 and fitting the guide member 22 into the guide member holding openings 41 and 42 includes the connecting member 25 and the guide member 22. Adhesive agent 60 for a connecting member and an adhesive agent for a guiding member, which are applied to the constituent wall surfaces of the opening portions 61, 62 for holding the connecting member and/or the opening portions 41, 42 for holding the guiding member in a state of being wet with water in advance. It is carried out with 40 wetted with water. Thereby, in particular, the connecting member adhesive agent 65 and the connecting member adhesive agent 60 and the guide member adhesive agent 40 stored in the guide member adhesive agent storing section 55 are melted by water to bond the connecting member. The adhesive 60 for the connecting member, which is eluted from the agent reservoir 65 and the adhesive reservoir 55 for the guide member and melted between the wall surfaces of the connecting member holding openings 61 and 62 and the connecting member 25, spreads, The melted guide member adhesive 40 spreads between the wall surfaces of the guide member holding openings 41 and 42 and the guide member 22, and the wall surfaces of the connecting member holding openings 61 and 62 are connected to the connecting member 25. The adhesive layer is formed more widely between the guide member holding openings 41 and 42 and the guide member 22. Therefore, the connecting member holding openings 61 and 62 and the connecting member 25 can be more firmly joined to each other via the adhesive layer, and the guide member holding openings 41 and 42 and the guide member 22 can be connected to each other with the adhesive layer. It can be joined more firmly via the.

In the above joining method, when the process of fitting the connecting member 25 and the guide member 22 into the connecting member holding openings 61 and 62 and the guide member holding openings 41 and 42 is attempted, the coating is already applied. Even if the adhesive 60 for connecting members and the adhesive 40 for guide members that have been solidified are solidified, the solidified adhesive 60 for connecting members and adhesive 40 for guide members return to an emulsion state by the action of water, A bonding effect can be exhibited in the subsequent drying step, whereby bonding to all the connecting member holding openings 61 and 62 and all the guide member holding openings 41 and 42 is performed in advance. Since the step of fitting the plurality of connecting members 25 and the plurality of guide members 22 can be continuously performed after applying the agent 60 and the guide member adhesive 40, the plurality of connecting members 25 can be continuously performed. , And the work efficiency at the time of joining the guide member 22 can be improved significantly.

<Blank removal operation>
The removal operation of the blank 2a using the blanking die 1 configured as described above will be described below mainly with reference to FIG.

As shown in FIG. 1, the material sheet 2 in a state where the blank 2a and the outer peripheral surplus portion 2b around the blank 2a are joined together by a required joining portion 2c is a blanking upper die 3 and a blanking lower die 4 And the blanking lower die 4 is raised in a state in which the blanking lower die 4 is fed between them and arranged in a predetermined position. Then, the outer shell surplus portion 2b of the material sheet 2 is sandwiched by the upper base material 23 and the margin pressing member 13, and when the blanking lower die 4 continues to rise, the blank pushing member 12 is inserted into the blank 2a of the material sheet 2. When the blanking lower die 4 is further brought into contact with the blank 2a, the blank 2a is pushed into the blank punching hole 31 by the blank pushing member 12, whereby the connecting portion 2c between the blank 2a and the outer shell surplus portion 2b around the blank 2a. Is sheared and the blank 2a is pulled out through the blank punching hole 31. In the present embodiment, the case where the blanking lower mold 4 is raised with respect to the blanking upper mold 3 is shown, but the present invention is not limited to this, and the blanking upper mold 3 is placed with respect to the blanking lower mold 4. It may be lowered.

As described above, the blank 2 a pulled out through the blank punching hole 31 does not come into contact with the wall surface (inner peripheral surface) of the blank punching hole 31, but only the plurality of guide members 22 while contacting the guide members 22. It is guided and dropped by the blank contact portion 22b, and further passes through the blank punching hole 32 and falls without contacting the wall surface (inner peripheral surface) of the blank punching hole 32. In this way, the blank 2a does not come into contact with the wall surfaces of the blank punching holes 31 and 32 but only comes into contact with the plurality of rod-shaped guide members 22 so that the blank 2a can be dropped smoothly. it can.

The blank 2a, which passes through the blank hole 32 and drops, is then moved to the slide guide 71 of the slide guide device 70 (see FIG. 7A) or the movable guide piece 88 of the partition/guide device 80 (FIG. 8A). (Refer to FIG. 3) and fall on the table 5 below and are aligned and stacked.

The blanking lower mold of the present invention has been described above based on the embodiment. However, the present invention is not limited to the structure described in the above embodiment, and the structure thereof is appropriately changed without departing from the gist thereof. It can be changed.

The blanking lower mold of the present invention can be suitably used for the purpose of blanking processing in the production of paper containers and the like.

DESCRIPTION OF SYMBOLS 1 Blanking type 2 Material sheet 2a Blank 3 Blanking upper type 4 Blanking lower type 21 Type main body 22 Guide member 22a Fitting end 22b Blank contact part 23 Upper side base material 24 Lower side base material 25 Connecting member 31, 32 Blank hole 35 Load receiving member 40 Guide member adhesive 41, 42 Guide member holding opening 45 Inward opening 46 Wide portion 47 Narrow portion 55 Guide member adhesive reservoir 60 Connecting member adhesive 61, 62 Connection member holding opening 65 Adhesive reservoir for connection member

Claims (10)

A blanking lower mold for pulling out a blank obtained by punching a material sheet,
A mold main body having a blank removal hole through which the removed blank can pass without contact,
A rod-shaped guide member joined to the mold body in an overhanging state inside the blank hole so as to come into contact with the outer peripheral edge of the blank that drops through the blank hole;
A blanking lower mold configured to guide a blank falling through the blank removal hole by the guide member. The blanking lower mold according to claim 1, wherein a guide member holding opening into which the guide member is fitted is formed at a portion of the mold body to which the guide member is joined. The guide member holding opening is formed to have a width wider than the width of the inward opening and the inward opening that are opened toward the inside of the blank removing hole, and the blank removing hole is formed from the inward opening. A wide portion that is arranged at a position distant from the outside and a narrow portion that is formed to have a width narrower than the width of the wide portion and that is arranged between the inward opening portion and the wide portion. ,
The guide member is a fitting end portion that is fitted into the guide member holding opening in a state in which the guide member is retained toward the inside of the blank hole by engaging a portion extending from the wide portion to the narrow portion, The blanking lower die according to claim 2, further comprising a blank abutment portion projecting from the inward opening portion so as to abut against an outer peripheral edge of the blank that drops through the blank removal hole. An adhesive reservoir for a guide member for accumulating an adhesive for a guide member that forms an adhesive layer between the guide member holding opening and the guide member is formed on the wall surface of the guide member holding opening. The blanking lower mold according to claim 2 or 3, which is formed. The blanking lower mold according to claim 4, wherein the guide member adhesive reservoir is formed in a groove shape extending along a fitting direction of the guide member into the guide member holding opening. The mold main body according to claim 1, wherein an upper base material and a lower base material, which are arranged to face each other at a predetermined interval in the vertical direction, are connected by a connecting member. Lower ranking type. The blanking bottom according to claim 6, wherein a connection member holding opening into which the connection member is fitted is formed at a portion of the upper base material and/or the lower base material to which the connection member is connected. Type. An adhesive reservoir for a connecting member for accumulating an adhesive for a connecting member that forms an adhesive layer between the connecting member holding opening and the connecting member is formed on a wall surface of the connecting member holding opening. The blanking lower mold according to claim 7, which is formed. The blanking lower mold according to claim 8, wherein the adhesive holding portion for the connecting member is formed in a groove shape extending along a fitting direction of the connecting member into the opening for holding the connecting member. An upper end and a lower end of the upper base member and the lower base member are respectively in contact with the upper base member and the lower base member, and a load receiving member that receives a vertical load acting on the upper base member and the lower base member is externally fitted to the connecting member. The blanking lower mold according to any one of claims 6 to 9.

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