JPS639438Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a punching device for punching out a soft molded body having a substantially C-shaped cross section, and more specifically, the present invention relates to a punching device for punching out a soft molded body having a substantially C-shaped cross section. This invention relates to a punching device that facilitates the process.

[Prior art] As a soft molded body that requires punching, for example, No. 9
There is a glass run 5 for automobile windows as shown in the figure.
This glass run 5 needs to be bent at a substantially right angle so as to fit into the shape of the window, and in order to obtain a predetermined shape for the bent portion, a punching process is performed to form a punched portion 5a as shown in FIG. There is.

However, in order to carry out the above-mentioned punching process, it is necessary to perform the punching process after expanding the bead part 5b near the punching point outward, and as shown in FIG. , punching was performed using a punching blade 7 and a lower die 6.

[Problems that the invention aims to solve] Conventionally, attaching and detaching the glass run to the lower mold was done manually. For this reason, punching and cutting to a fixed length had to be performed as separate processes, making it difficult to improve work efficiency.

The present invention has been devised in view of the above-mentioned problems, and it is an object of the present invention to provide a punching device that allows punching to be performed automatically and mechanically.

[Means and effects for solving the problems] The punching device of the present invention includes a long soft molded body having a substantially C-shaped cross section, a die forming one of the punching blades, and a die forming the other punching blade. A punch that constitutes a punching blade and punches the molded body between the punch and the die, and a set of two opening tools inserted into the inside from the side peripheral opening of the molded body, and the punch is configured to punch out the molded body between the punch and the die, and a pair of opening tools are inserted into the inside from the side peripheral opening of the molded body, and the opening tools are inserted into each other. an opening device that can be driven in directions away from and toward the die; and a drive source that moves the punch relative to the die to drive the set of opening tools of the opening device in a direction substantially perpendicular to the direction of movement of the punch. By operating the driving source in one direction, the opening tool is driven away from each other to open the opening on the side of the molded body, and the punch is inserted into the die through the opened opening. The molded body is punched between the punch and the die by placing the punches close to each other.

The soft molded body referred to in the present invention is one formed by extrusion molding, injection molding, or the like using a soft resin, rubber, or the like as a raw material. Such soft molded bodies include, for example, the glass run described above, and the punching apparatus of the present invention is suitable for punching long soft molded bodies having an approximately C-shaped cross section and a side peripheral opening, such as the glass run. Particularly effective.

The most distinctive feature of the punching device of the present invention is that it is inserted into the side peripheral opening of the molded body and expands the opening to enable punching, and the punching device operates in conjunction with the movement of the punch. It is equipped with a driving coupling mechanism. This opening device has 2 pieces 1
The molded body has a set of openings that are inserted into the side openings of the molded body. Then, the opening device drives the opening tools in a direction that moves them away from each other, thereby expanding the side peripheral opening and making punching possible with a punch.
Further, the opening device drives the opening tools in a direction toward each other, so that the side peripheral opening returns to its original state.

It is desirable that the opening device is driven in conjunction with the movement of the punch. There are the following coupling mechanisms that link the movement of the punch and the movement of the opening device in conjunction with each other. For example, the punch and the opening device are configured to be driven by the same driving source, and first, a pair of opening tools inserted into the side peripheral opening of the molded body are moved in a direction substantially perpendicular to the moving direction of the punch, and the opening tools are moved away from each other. After that, the punch punches the inside of the widened side circumferential opening. It also has, for example, tapered opening devices that are biased toward each other by a force such as a spring,
It is also possible to adopt a configuration in which when the punch moves in the direction of punching out the molded body, the taper portion etc. are pushed open by the punch, thereby driving the opening tool in the direction away from the punch.

The punching device of the present invention has a punch and a die as punching blades. Among these, the same punches as conventional ones can be used, and various cross-sectional shapes such as rectangular, circular, and elliptical can be selected depending on the shape of the part to be punched. On the other hand, the die constituting the other part of the punching blade is of course one that has a hole with the same shape as the cross section of the punch, but in order to improve punching accuracy, it is desirable to hold the molded body to be punched. . That is, it is desirable that the upper end surface of the die be provided with a guide portion having a cross-sectional shape that is substantially symmetrical to the cross-sectional outer peripheral shape when the side peripheral opening of the molded body is expanded by the opening tool. This makes it possible to sandwich the molded body between the opening tool and the guide portion during punching, thereby reliably holding the molded body and improving punching accuracy.

Note that the purpose of the present invention can be achieved even if the opening tool does not press the molded object against the die surface, but it is possible to sandwich the molded object between the opening tool and the die, and the opening tool presses the surface of the molded object to be punched against the die surface. It is desirable to move while This allows the molded body to come into close contact with the die surface, making the punching accuracy even more accurate.

In addition, the punching device of the present invention is for punching soft molded bodies, and if the molded body is simply carried into or out of the punching device by a conveyor device outside the punching device, the molded body will be deformed and punched. There is a possibility that a problem that degrades accuracy may occur. Therefore, it is desirable that the punching device is equipped with a conveying device such as a conveyor belt for driving the molded product in the longitudinal direction.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

This embodiment relates to a punching device for punching out a soft vinyl chloride glass run for automobile windows as shown in FIG.

(Embodiment 1) FIG. 1 is an overall side view including a partial cross section of a punching device according to an embodiment of the present invention.

The punching device 10 includes a case 12 fixed on a main body base 11, an air cylinder 13 as a drive source fixed to the upper external surface of the case 12, and a drive shaft 1 driven vertically by the air cylinder 13.
4, a punch holder 15 fixed to the lower part of the drive shaft 14, a flat punch 16 fixed to the punch holder 15 so that the cutting edge faces downward, and the punch 1.
A die holder 17 fixed inside the case 12 below, a die 18 held on the surface of the die holder 17, an opening device 20 connected to the punch holder 15 and the die holder 17, and an opening device 20 that penetrates the case 12 and opens the die 18. It is comprised of a conveying device 30 that conveys the glass run 1 so as to move the surface in the horizontal direction.

Opening device 2 based on FIGS. 2, 3 and 4
0 will be explained in detail.

FIG. 2 is an enlarged front view of the opening device 20, FIGS. 3 and 4 are sectional views taken along the line A-A in FIG.
It is a BB arrow sectional view.

The punch holder 15, which is fixed to the drive shaft 14 (FIG. 1) by a well-known joint mechanism, has a tapered tip 4 extending downward from the punch holder 15.
Book pushers 21a, 21b, 21c, and 21d are fixed symmetrically.
Two pairs of bearings 22a, 22b, one pair on the left and right sides, are fixed to the die holder 17 at both ends, and guide rods 23a, 23b are connected to the pair of bearings 22a, 22b, respectively.
It is pivotally supported by b. These guide rods 23a, 23
In b, cubic-shaped sliders 24a, 24b, 24c, 2 are provided with a through hole in the center having a cross-sectional shape that is substantially the same as that of the guide rods 23a, 23b.
Two pieces of 4d are threaded through each shaft so that they can be moved left and right. These sliders 24a, 24
b, 24c, 24d are guide rods 23a,
Coil spring 25 whose shaft is passed through both ends of 23b
Guide rod 23 by a, 25b, 25c, 25d
A and 23b are biased toward the center.
Further, levers 2 protruding outward from the center portions of the guide rods 23a, 23b are provided on the outer end surfaces of the sliders 24a, 24b, 24c, and 24d, respectively.
6a, 26b, 26c, and 26d are fixed, and rotatable rollers 27a, 27b, 27c, and 27d are pivotally attached to the tips of these levers, respectively. Furthermore, the tip is bent downward in an L-shape 1
The pair of claw members 28a and 28b are respectively attached to the slider 2.
4a, 24c and sliders 24b, 24d. Further, locking members 29a, 29b are fixed to the center portions of the guide rods 23a, 23b, and are designed to stop the sliders 24a, 24b, 24c, 24d, which are biased by coil springs, at that position. .

The die 18 has the shape shown in FIG. 6, and when the side opening of the glass run 1 is expanded, the die 18
The bead portion of the die 18 is formed so as to come into contact with the inner surface of the edge 18a of the die 18. Also, in the center of the die 18, there is a hole 1 having the same cross-sectional shape as the punch 16.
8b, and a through groove 18c communicating with this hole 18b.
is provided. This is to enable punching and to allow waste produced by punching to escape. In addition, in case of malfunction, the claw member 2
8a and 28b are provided with notches 28c, and the punch 1
6 damage is prevented.

In the punching device of the first embodiment configured as described above, when the punch holder 15 is driven by the air cylinder 13 and the punch holder 15 starts to descend, the tips of the tapered portions of the pushers 21a, 21b, 21c, and 21d are moved to the rollers 27a, 27b, 27c, 27d
engage with. And Pushya 21a, 21b, 2
As sliders 1c and 21d descend, sliders 24a and 2
4b, 24c, 24d are guide rods 23a, 23b
The claw members 28a, 28b moved outward from the center of the glass run 1 and inserted into the side peripheral opening of the glass run 1 expand the opening outward accordingly. When the pushers 21a, 21b, 21c, and 21d further descend and the rollers 27a, 27b, 27c, and 27d pass the tapered portion, the bead portion of the glass run 1 is sandwiched between the edge 18a of the die 18 and the claw members 28a, 28b. In rare cases, the glass run 1 is held on the die 18.
When the punch holder 15 further descends, the fifth
As shown in the figure, the hole 18b of the punch 16 and die 18
Accurate punching of the glass run 1 is performed by the through groove 18c. As the punch holder 15 rises due to the operation of the air cylinder 13 in the opposite direction, the punch 16 and each pusher rise.
Due to the biasing force d, the guide rods 23a, 23b are moved closer to the center, and the claw members 28a, 28b
Both move closer to the center. As a result, the glass run 1 is released from the hold and is transported by the conveyor belt 31 of the transport device 30, and the next punching location is placed on the die 18.

(Example 2) The punching device of Example 2 is constructed in exactly the same manner as Example 1 except that the structure of the claw member is different.

7 and 8 are a front view and an enlarged sectional view of the main part of the lower end of the claw member 40. FIG. This claw member 4
Similarly to the first embodiment, two lower end portions bent into an L-shape are formed on each pair of claw members. The lower end portion is composed of a movable portion 43 and a fixed portion 44, and the movable portion 43 is inserted into the fixed portion 44 and urged downward by a spring 45 within the fixed portion 44. A locking protrusion is formed at one end of the movable part 43 inserted into the fixed part 44 and at one end of the fixed part 44 to prevent the movable part 43 from falling off from the fixed part 44. A convex portion 41 is formed at the lower end of each movable portion 43, and a ball 42 is rotatably disposed within this convex portion 41.

When the glass run is attached to the die, the ball 42 of the claw member 40 comes into contact with the bottom surface of the glass run.
When the slider moves outward, the pawl member 40 moves smoothly on the glass run surface due to the rotation of the ball 42. This ensures that the bottom surface of the glass run comes into contact with the die surface, further improving the precision of punching.

[Effects of the invention] The invention makes it possible to fully automate the punching work of soft molded bodies such as glass runs, which was conventionally performed as the main work. Furthermore, this allows cutting and punching, which were conventionally performed in separate processes, to be performed on one line, which has a significant effect on reducing the number of man-hours.

[Brief description of the drawings]

1, 2, 3, 4, 5, and 6 relate to the punching device of Example 1, and FIG. 1 is an overall side view including a partial cross section; Fig. 2 is an enlarged front view of the main parts of the opening device, Fig. 3 is a sectional view taken along the line A-A in Fig. 2, Fig. 4 is a sectional view taken along the line B-B in Fig. 2, and Fig. 5 is a punched section. FIG. 6 is an enlarged front view of the main part of the shedding device showing the completed state, and FIG. 6 is a perspective view of the die used. Figures 7 and 8 are Example 2
Fig. 7 is a front view thereof, and Fig. 8 is an enlarged sectional view of the main part. 9 and 10 show conventional examples, FIG. 9 is a perspective view of a glass run, and FIG. 10 is a schematic sectional view showing a conventional punching process. 1, 5...Glass run, 7,16...Punching blade,
18...Dice, 21a, 21b, 21c, 21
d... Pushya, 23a, 23b... Guide rod,
24a, 24b, 24c, 24d...slider,
28a, 28b...Claw members.

Claims (1)

[Claims for Utility Model Registration] (1) An elongated soft molded body having a substantially C-shaped cross section is disposed, and a die constitutes one of the punching blades, and a die constitutes the other punching blade, and a punch for punching the molded body between the holes; and a punch inserted into the molded body through the side opening of the molded body.
an opening device having a set of opening tools and capable of driving the opening tools in directions away from and toward each other; It is composed of a connecting mechanism that drives the opening tools in a direction substantially perpendicular to the moving direction of the punch, and by operating the drive source in one direction, the opening tools are driven in a direction away from each other to open the side peripheral opening of the molded body. A punching device characterized in that when opened, the punch is brought close to the die through the opened opening, and the molded body is punched between the punch and the die. (2) The punch according to claim 1 of the utility model registration claim, which has a guide portion on the upper end surface of the die having a cross-sectional shape that is approximately symmetrical to the cross-sectional outer circumferential shape of the molded product when the opening of the molded product is opened. Device. (3) The punching device according to claim 1, which is a utility model and has a conveying device that drives the molded product in the longitudinal direction.