JPH0513519Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a positioning structure that facilitates the positioning of a die in a sheet punching device.

[Conventional technology and its issues]

As shown in FIG. 4, a sheet punching device for punching paper such as cardboard or a sheet of metal or plastic into a desired shape includes a sheet supply section 21 and a sheet A that is fed from the sheet supply section 21. The apparatus includes an endless transfer device 23 having a plurality of sheet holding means 22, and a punching section 24, a stripping section 25, and a punched sheet separating section 26 are provided in this order in the middle of the sheet A transfer path.

As shown in FIG. 5, the punching section 24 includes an upper mold 28 having a punching blade 29 corresponding to the product shape and a projection 30 for forming crease lines, and receives the punching blade 29 and the projection 30 on the upper surface. The lower die 31 is provided facing each other, and at least one of the two dies 28 and 31 is moved up and down, so that the sheet A is supplied between the two dies.
Form a punching cut line and a crease line.

Further, like the punching part 24, the stripping part 25 includes an upper mold 32 equipped with a push-off blade.
and a lower mold 33 facing thereto, both molds 3
2 and 33, the excess portion of the sheet A sent from the punching section 24 is punched out.

In the punching section 24 and stripping section 25, the sheets are punched or stripped (stripped) using blades and protrusions that correspond to the shape of the product, so if the shape of the product changes, the It is necessary to replace the mold with an upper mold and a lower mold equipped with cutters according to the shape of the product.

Conventionally, as shown in FIG. 6, the upper die 28 is detachably attached to a mold frame 27 arranged at a fixed position on the sheet transport path with screws or the like.
The mold 27 is inserted into an opening 39 provided in a side frame 38 on the side of the sheet conveying section as shown in FIG.
From the opening 39, a pair of guide arms 34 are attached to both sides of the opening 39 (only one arm is shown in FIG. 7).
After being pulled outward along the guide arm 34
The formwork 27 is rotated up and down by a reversing support 37 provided at the tip of the formwork 27, so that the upper mold 28 is replaced in a state where it faces the upper side of the formwork 27. On the other hand, the lower mold 31 is replaced by being pulled outward along a rail 36 provided on the lower side of the guide arm 34.

[The problem that the idea attempts to solve]

By the way, upper mold 2 is made according to the product shape of the sheet.
8, the upper mold 28 needs to be correctly positioned at a predetermined position relative to the sheet supply position while being placed on the sheet transport path. That is, unless the cutter or protrusion provided on the upper mold is in the correct position with respect to the sheet fed below, the sheet cannot be punched into the desired shape. Therefore, when the upper mold is replaced outside the apparatus, it is necessary to position the upper mold at a predetermined position with respect to the mold.

In the conventional positioning of the upper mold, alignment marks 40 and 41 are provided on the mold frame 27 and the upper mold 28, respectively, as shown in FIG.
Aligning the positions of 0 and 41, place the upper mold 28 on the formwork 2.
I used a method of fixing screws from the bottom side of 7. Incidentally, such positioning of the upper mold is performed in the same manner in the case of the upper mold in the stripping section 25.

However, in the above method, since the alignment marks 40 and 41 are visually aligned, accurate alignment takes time, and the upper mold 28 is fixed with screws while being placed on the upper surface of the mold 27. For,
There was a problem in that the upper die could easily shift position due to a small impact when screwing. Furthermore, since there is some play between the screw and its screw hole, there is a drawback that accurate positioning cannot be performed.

On the other hand, as a technique for positioning the mold and the mold as described above, there is a technique described in Japanese Utility Model Publication No. 44-9325. This is done by installing dowel pins on the formwork.
The mold is provided with holes and elongated holes corresponding to the dowel pins, and the dowel pins are inserted into the holes and elongated holes to position the mold on the upper surface of the formwork.

However, in the above structure, it is necessary to provide fitting play between the hole or long hole and the knock pin to enable insertion, so when fixing with bolts etc. after positioning, the fitting play is However, there is a drawback that positional deviation occurs.

In addition, since it is necessary to suspend the mold on the formwork and fit the dowel pins into the holes and elongated holes, there is a drawback that alignment is time-consuming. In particular, the molds used in punching equipment are large and heavy, and must be replaced many times a day. Therefore, the method of hanging and positioning the molds takes time to replace, which significantly impairs work efficiency. There's a problem.

On the other hand, a method is conventionally known in which a plurality of positional references are provided on a plane with which a member makes point contact, and the member is moved onto the plane and positioned by contacting the positional reference.

However, when positioning a plate-shaped material between multiple positional references that make point contact, it is necessary to move the material so that the corner of the material is between the positional references. It is difficult to move a large and heavy member in a specific direction without any guidance. In particular, as shown in Figure 7, when replacing the upper mold in a sheet punching device, the upper mold is pulled out between a pair of guide arms, so the working space is extremely narrow. Accurately moving the upper die in a specific direction is an extremely difficult task.

In addition, in the positioning method using point contact, slippage is likely to occur at the contact part, and if the distance between the position references is narrow, the position may easily shift if force is applied in a direction other than the direction towards the position reference. .
However, if the distance between the position standards is increased to prevent this misalignment, the members tend to tilt.
There is a drawback that positioning accuracy decreases.

Furthermore, in order to achieve good alignment, all the sides of the mold that come into contact with the positional references must be finished with high precision, which causes the problem that manufacturing the mold is costly and labor-intensive.

[Purpose of invention]

Therefore, the object of this invention is to provide a positioning structure that can reliably position the upper mold relative to the mold with a simple operation, and can significantly shorten the replacement time.

[Means to solve the problem]

In order to achieve the above object, this invention uses one side of the outer periphery of the upper mold as a linear first positioning side, and also provides a linear first positioning reference side opposite to the first positioning side on the formwork. , a protrusion on either the first positioning side or the first positioning reference side,
A recess into which the protrusion fits is provided on the other side,
The protrusion is formed with a linear second positioning side that is inclined at a predetermined angle with respect to the first positioning reference side, and the recess is formed with the first positioning side and the first positioning side.
A linear second positioning reference side is formed that contacts the second positioning side with the positioning reference side in contact with the second positioning side, and a through hole through which the screw is inserted into the mold is formed so that the screw is screwed into the upper mold. The structure is such that the screw holes are provided respectively, and the fitting play between the protrusion and the recess is smaller than the play between the screw and the through hole.

[Effect]

In the above structure, the upper mold is placed on the formwork,
With the projection and the recess fitted, the first positioning side and the first positioning reference side are brought into contact, and the second positioning side and the second positioning reference side are brought into contact. This results in
Since the two sets of linear sides abut each other and are constrained in two directions, the upper die is reliably positioned.

With this structure, the movement of the mold can be guided by the contact between the linear sides, so the upper mold can be positioned reliably, and since the two sets of straight sides are in close contact with each other, the upper mold can be guided. Movement can be reliably stopped and positional deviation will not occur. Furthermore, since the fit between the protrusion and the recess restricts play between the screw for attaching the upper mold and the through hole, the upper mold positioned on the mold can be securely fixed without shifting.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIG. 1, the formwork 2 supporting the upper die 1 for punching consists of a pair of parallel crosspieces 3 and a plate part 4.
A large number of through holes 6 are formed in the plate portion 4.

Further, a step 5 is formed on the outer surface of the crosspiece 3 along its longitudinal direction, and an outer side 5a of the step is formed.
is the rotating roll 3 of the guide arm 34 shown in FIG.
It becomes the track section guided by 5.

A punching blade 7 corresponding to the outer edge shape of the punched product and a protrusion 8 for forming a crease line corresponding to the position of the crease are embedded in the surface of the upper die 1.
A plurality of screw holes 9 are formed at the four corners of the formwork 2 in accordance with the intervals of the through holes 6 in the plate portion 4 of the formwork 2.

The front side of the upper die 1 in the sheet supply direction becomes a first positioning edge 10 for positioning the upper die 1 in the front-rear direction, and a protruding member 12 is placed in the middle thereof as shown in FIGS. 2 and 3. is installed. A portion of this protruding member 12 protrudes outward to form a protrusion 11.

On the other hand, the crosspiece 3 corresponding to the first positioning side 10
A first positioning reference side 13 that comes into contact with the positioning side 10 is formed on the inner side of the protrusion 11 .
A recess 14 into which the protrusion 11 fits into a position corresponding to
is formed.

A second positioning side 15 that is orthogonal to the first positioning side 10 is formed on the side of the protrusion 11, and a first positioning side 15 is formed in the recess 14 as shown in FIG. 10 and the first positioning reference side 13 are in contact with each other, the second positioning side 1
A second positioning reference side 16 that abuts on the second positioning reference side 5 is formed.

This embodiment has the above-mentioned structure, and the upper mold 1 is positioned on the mold frame 2 pulled out to the outside of the device along the guide arm as shown in FIG.
Place the protrusion 11 and recess 1 as shown in FIG.
4 and the first positioning side 10 of the upper mold 1.
and the first reference side 13 are brought into contact with each other, and then one of the second positioning sides 15 of the protrusion 11 and the second reference side 16 of the concave portion 14 opposing thereto are brought into contact with each other. As a result, the upper die 1 has a side of 1 with respect to the sheet feeding direction.
Positioning is performed by contact between sides 15 and 13, and positioning is performed by contact between sides 15 and 16 in the direction perpendicular to the sheet feeding direction.

As described above, the upper die 1 can be positioned in two directions at the same time by simply bringing the two opposing sides into contact, so alignment can be done in a short time, and
Since the sides are brought into contact with each other, there is no fitting play that occurs when fitting a dowel pin and a hole, and accurate positioning can always be performed.

In addition, since it is only necessary to bring two sets of straight sides into contact with each other, the work is much easier than when suspending the mold and inserting a pin into the hole, and the replacement work can be done in a short time. can.

To fix the upper mold 1 to the mold frame 2, after positioning as described above, while pressing the upper mold 1 in the direction in which sides 10, 13 and sides 15, 16 are in contact with each other, screw the plurality of screws 17 into the mold. This is done by passing through the through hole 6 from the bottom of the frame 2 and screwing it into the screw hole 9 of the upper die 1. In this case, in order to stop the movement of the upper mold 1 in two directions when the sides 10 and 13 and the sides 15 and 16 come into contact with each other, the screws 17
Even when the upper die 1 is screwed into the screw hole 9, the upper die 1 does not shift and can be securely fixed.

Note that the shapes of the protrusion 11 and the recess 14 are not limited to the shapes shown in the figures, and the second positioning side 15 and the second reference side 16 are arranged at an angle other than 90 degrees with respect to the first positioning side 10. It may be formed into a tapered surface that is inclined at an angle. Further, a protrusion may be provided on the side of the frame 3 of the formwork 2, and a recess may be formed on the side of the upper mold 1.

In addition, although the positioning structure of the upper die 1 in the punching section has been explained above, the mounting structure of the upper die and the formwork in the stripping section is basically the same as that of the punching section, and therefore, the positioning structure is the same as that described above. By using the mold, it becomes easy to set the mold, and in combination with the above-mentioned punching section, the working time can be greatly shortened.

[Effect] As explained above, in this invention, the first positioning side and the first
By providing a reference side, a second positioning side, and a second reference side, and by bringing the two sets of sides into contact with each other, the mold can be positioned in two directions with respect to the formwork, so the positioning of the mold is easy. This can be done easily and reliably, and the replacement work time can be greatly reduced.

In addition, since positioning can be performed by bringing the linear sides into contact with each other, the operation is extremely easy compared to the case where the mold is lifted and aligned by inserting dowel pins and holes, which has the advantage of improving work efficiency.

Furthermore, since the upper mold is restrained by bringing the two sets of linear sides into contact with each other, the upper mold can be securely fixed without shifting. Therefore, when the mold and the mold frame are fixed with screws or the like, it is possible to prevent the mold from shifting, and to ensure reliable fixing.

In addition, the second positioning side and the reference side are provided in the protrusions and recesses formed on the first positioning side and the reference side, and the positions of both sides are placed close to each other, so that a highly accurate reference surface can be formed on one side. In addition to being able to concentrate and reduce processing costs, the movement of the upper die for alignment is extremely small, which has the effect of allowing alignment to be accomplished in a short time.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the embodiment of the present invention before the mold and formwork are positioned; Figure 2 is an enlarged view of the main parts of the same mold and formwork with the mold and formwork positioned;
The figure is a sectional view taken along the - line in Fig. 2, Fig. 4 is a diagram showing the structure of the sheet punching device, Fig. 5 is a sectional view showing the relationship between the upper die and the lower die of the punching part, and Fig. 6 is a sectional view taken along the - line of Fig. 2. FIG. 7 is a perspective view showing a conventional example, and FIG. 7 is a perspective view showing a drawing structure of a mold and an upper mold of a sheet punching device. DESCRIPTION OF SYMBOLS 1... Upper die, 2... Formwork, 3... Crosspiece, 4... Plate part, 7... Punching blade, 8... Crease line forming protrusion, 10... First positioning side, 11... Projection, 13...first positioning reference side, 14...recess, 15...second positioning side, 16...second positioning reference side, 24...punching part, 25...stripping part, A...sheet.

Claims (1)

[Scope of utility model registration request] In a sheet punching device that performs stripping by moving up and down at least one of an upper mold that is removably supported by a formwork and a lower mold that is arranged opposite to the upper mold, the sheet is punched and stripped between the two molds,
One side of the outer periphery of the upper mold is a linear first positioning side, and the formwork is provided with a linear first positioning reference side opposite to the first positioning side.
A protrusion is provided on one of the positioning side and the first positioning reference side, and a recess into which the protrusion fits is provided on the other side. forming a second positioning side, and forming in the recess a linear second positioning reference side that abuts the second positioning side while the first positioning side and the first positioning reference side are in contact with each other; A through hole into which the screw is inserted is provided in the formwork, and a screw hole into which the screw is screwed into the upper mold, and the fitting play between the protrusion and the recess is made smaller than the play between the screw and the through hole. A mold positioning structure in a sheet punching device characterized by the following.