JPH036621Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a caulking device for caulking and fixing a metal cap to the end of a paper tube that serves as a core for winding newspaper rolls, other paper materials, and sheets. It is something.

(Prior Art) The applicant previously proposed the devices shown in FIGS.
No. 55-25109).

The above device has a guide tube 3 into which the cap 9 of the paper tube 8 is fitted.
A wedge shaft 6 is reciprocably disposed at the axis of the wedge shaft 6, and a reciprocating drive device (not shown) such as a hydraulic cylinder device is connected to the wedge shaft.

At the front end of the guide cylinder 3, a plurality of press pieces 5 each having an arcuate outer periphery are arranged circumferentially at equal intervals and movable in the radial direction. It is biased in the direction of retraction from the radial direction.

A push-up piece 33 having a wedge-shaped outer end is disposed between adjacent press pieces 5 so as to be movable in the radial direction, and the outer end tapered surface 34 of the push-up piece 33 connects to the inclined surface 57 of the adjacent press piece 5. It is in sliding contact with the

A plurality of punch pieces 4 are disposed within the guide tube 3 so as to be movable in the radial direction, and a protrusion 4 at the outer end of the pieces
1 is a through guide hole 3 opened in the peripheral wall of the guide tube 3
It is attached to 1 so that it can appear and disappear.

The inner end of the punch piece 4 is formed into a tapered surface 40 corresponding to the wedge surface 61 of the wedge shaft 6.

As shown in FIG. 8, after fitting the paper tube cap into the guide cylinder 3, the wedge shaft 6 is advanced.

The push-up piece 33 moves in the radial direction by the thrust generated by the wedge surface 61 of the wedge shaft 6, and the tapered surface 34 of the push-up piece 33 pushes up the inclined surface 57 of the adjacent press piece 5 to move the press piece 5 in the radial direction. The piece is pushed out, and the back end of the base 9 is enlarged and deformed by the outer circumferential arc surface of the piece, so that it bites into the paper tube 8.

The punch piece 4 is pushed out in the radial direction by the thrust of the wedge surface 61 of the wedge shaft 6, causing the protrusion 41 at the tip of the piece to come out from the guide hole 31 of the guide piece 3, and the mouth piece 9 to be locally pushed into the paper tube. 8, and caulk and fix the cap 9 to the paper tube 8.

(Problems to be Solved) In the above device, when caulking the mouthpiece 9, there are gaps between the wedge shaft 6 and the press piece 5, between the wedge shaft 6 and the push-up piece 33, and between the tapered surface 34 of the push-up piece 33. Friction occurs between the slanted surface 34 of the punch piece 4 and the press piece 5, and since the frictional contact area is large, the forward movement of the wedge surface 61 of the wedge shaft 6 is caused in the radial direction of the punch piece 4 and the press piece 5. There was a problem that there was a loss in power transmission when converting to movement of .

(Means for solving the problem) The present invention is a base crimping method that eliminates the push-up piece, reduces frictional sliding parts, increases power transmission efficiency, and downsizes the reciprocating drive device that drives the wedge shaft. It reveals the device.

In the paper tube cap crimping device of the present invention, either the punch piece 4 or the press piece 5 is provided with a push-up piece 52 that supports the inner surface of the other piece and projects in the direction of the wedge shaft 6. Alternatively, when one of the punch pieces 4 moves in the radial direction, the push-up piece 52 of the punch piece 4 moves in the radial direction.
The other piece is also pushed up and moves in the radial direction.

(Operation and Effect) As the wedge shaft 6 moves forward, either the punch piece 4 or the press piece 5 is pushed out in the radial direction by the wedge surface 61 of the shaft. Along with this, the other piece is also moved in the radial direction by the push-up piece of the piece, and the driving of the punch piece 4 and the biting of the back end of the mouthpiece 9 into the paper tube 8 by the press piece 5 are performed simultaneously.

When the punch piece 4 is pushed up by the push-up piece 52 protruding from the press piece 5, no friction occurs between the punch piece 4 and the press piece 5.

Even when the punch piece 4 is provided with a push-up piece protrudingly provided, no friction occurs between the press piece 5 and the punch piece 4.

Therefore, as in the conventional case, there are no gaps between the wedge shaft 6 and the press piece 5, between the wedge shaft 6 and the push-up piece 33, and between the push-up piece 33.
Compared to a device in which friction occurs between the wedge shaft and the press piece 5, the frictional resistance that acts when the wedge shaft protrudes is small and the power transmission efficiency is high.

(Example) Fig. 7 shows two caulking devices 2, 2 according to the present invention.
The figure shows a crimping machine which is arranged facing each other on a base 1 so as to be able to approach and separate from each other, and simultaneously crimps caps fitted on both ends of a paper tube.

The main body legs 22 of each caulking device are penetrated and screwed into both ends of a screw shaft 11 which is horizontally and rotatably arranged on the base 1.

The screw shaft 11 has threaded portions at both ends with opposite lead directions, and by rotating the screw shaft 11 with a rotation drive device 12, both caulking devices 2 are moved toward and away from each other.

As shown in FIG. 1, in each caulking device 2, a guide tube 3 is fixed to the device main body 21, and a wedge shaft 6 having a conical wedge surface 61 at the tip is reciprocally movable at the axis of the guide tube 3. A reciprocating drive device (not shown) such as a hydraulic cylinder device is connected to the wedge shaft 6.

As shown in FIGS. 1 and 6, eight through guide holes 31 are opened at equal intervals in a staggered manner on the outer peripheral surface of the guide tube 3, and one end of the L-shaped punch piece 4 is inserted into the guide hole 31 in the radial direction. It is stuck in such a way that it can be haunted.

The outer end of each punch piece 4 has a mountain-shaped driving protrusion 41
is formed, and the punch piece 4 is urged by a spring 42 in the direction of sinking in the radial direction of the guide cylinder 3.

As shown in FIGS. 4 and 5, an annular end plate 7 is bolted and fixed to the distal end surface of the guide cylinder 3 via a cylindrical spacer 72. As shown in FIGS.

In the embodiment, the end plate 7 is attached to the tip surface of the guide tube 3 by four bolts 73 screwed together concentrically at equal intervals.
is fixed, the cylindrical spacer 72 is fitted onto each bolt 73 between the tip surface of the guide tube 3 and the end plate 7, and the press piece slides between the tip surface of the guide tube 3 and the end plate 7. A space 30 is formed.

Four press pieces 5, 5a are arranged in the press piece sliding space 30 at equal intervals in the circumferential direction and movable in the radial direction.

Each press piece 5, 5a is formed into a fan-shaped body with an angle of about 130 degrees, and has a long hole 50 extending in the radial direction in the center thereof, and the cylindrical spacer 72 is slidably fitted into the long hole 50. .

A pair of press pieces 5, 5 that face each other across the axis of the guide tube 3 have fan-shaped notches 51 with an arc of about 20 degrees at both ends of the rear surface at a depth of about 1/2 of the thickness of the press pieces 5. formed, and the other pair of press pieces 5a, 5
In a, fan-shaped notches 51a having an arc of approximately 20 degrees are formed at both ends of the front surface at a depth approximately 1/2 of the thickness of the press piece 5, and adjacent press pieces 5, 5a are formed at each other's notches. 51 and 51a are opposed to each other.

The outer periphery of each press piece 5 is bulged over the entire circumference near the end plate 7.

A push-up piece 52 is provided at the inner end of each press piece 5 and projects rearward in the axial direction of the wedge shaft 6.
The punch piece 4 is placed on top.

The inner surface of the push-up piece 52 on the side of the wedge shaft 6 is the wedge surface 6 of the shaft.
1 is formed on the tapered surface 53.

As shown in FIG. 4, a short receiving piece 54 is provided at the inner end of each press piece 5 to project forward, and a round hole 7 in the end plate 7 is provided.
A spring 55 protruding from the inner surface of the guide cylinder 1 contacts the receiving piece 54 and urges the press piece 5 toward the axis of the guide cylinder 3.

The screw shaft 11 of the caulking machine shown in FIG.

A device 2, 2 for crimping a paper tube with caps fitted at both ends.
The screw shaft 11 is rotated in the opposite direction, and the guide tubes 3 of both caulking devices 2 are fitted into the base 9 as shown in FIG.

The paper tube is held between the two crimping devices by an automatic paper tube feeding device (not shown) including a paper tube stocker.

In this embodiment, unlike the conventional example, the springs and bolts are not exposed on the front side of the end plate 7, and when the paper tube is intermittently fed between the crimping devices, even if it shifts slightly in the axial direction, the edge between the paper It will not get caught in the crimping device.

After fitting the guide tubes 3, 3 to both ends of the paper tube, the wedge shaft 6 is advanced to the back of the paper tube 8.

The press piece 5 is pushed out in the radial direction by the thrust force in the radial direction generated by the wedge surface 61 of the wedge shaft 6, and the punch piece 4 is also moved in the radial direction by the push-up piece 52 of the piece, so that the punch piece 4 is driven and At the same time, the press piece 5 bites the back end of the mouthpiece 9 into the paper tube 8.

In a conventional caulking device, the punch piece 4 is directly pushed out by the wedge surface 61 of the wedge shaft 6, but the press piece 5 is pushed up in the radial direction by the tapered surface 34 of the push-up piece 33, so the radial The moving speed of the press piece 5 in this direction is slower than that of the punch piece 4.

However, in the present invention, press piece 5 and punch piece 4
9 at the same time at the same speed in the radial direction.
Since the press piece 5 is caulked, the time required for caulking is shorter than that of the conventional device, and the stroke of moving the wedge shaft in order to push out the press piece 5 by the required stroke is also short.

In the embodiment, the push-up piece 52 was provided protruding from the press piece 5, but the same effect as described above can also be obtained by providing a push-up piece protruding forward from the punch piece 4 and placing the press piece on the push-up piece. I can play.

When carrying out the present invention, the number of punch pieces 4 and press pieces 5 is not limited to that of the embodiment,
It is possible to increase or decrease the design as necessary, and various other modifications are possible within the scope of the claims for utility model registration.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the crimping device just before the clasp is crimped, Figure 2 is a sectional view of the crimping device when the clasp is crimped, Figure 3 is a plan view of the main parts of the crimping device, and Figure 4
The figure is a sectional view along the line of Fig. 3, and Fig. 5 is a cross-sectional view along the line of Fig. 3.
Figure 6 is an exploded perspective view of the caulking device, Figure 7 is a front view of a caulking machine with two caulking devices arranged opposite each other, and Figure 8 is a caulking machine previously proposed by the applicant. 9 is a sectional view taken along the - line in FIG. 8, FIG. 10 is a sectional view of the device shown in FIG. 8 with the cap crimped, and FIG. It is a sectional view along the XI-XI line. 2... Caulking device, 3... Guide cylinder, 4... Punch piece, 5... Press piece, 52... Push-up piece, 6
...Wedge axis.

Claims (1)

[Scope of utility model registration request] A tapered wedge shaft 6 is disposed at the axis of the guide cylinder 3 so as to be able to reciprocate in the axial direction, and the thrust generated by the wedge surface 61 of the shaft moves the press pieces 5, 5a and the punch piece 4 in the radial direction of the guide cylinder 3. The back edge of the paper tube cap 9 fitted into the guide tube 3 is pressed and deformed by the press piece 5 to bite into the thickness of the paper tube 8, and the punch piece 4 locally pushes the cap 9 into place. In the paper tube cap crimping device that drives the paper tube into the wall thickness of the paper tube 8, either the punch piece 4 or the press piece 5 has a push-up piece 52 that supports the inner surface of the other piece in the axial direction of the wedge shaft 6. When one of the pieces protruding from the push-up piece 52 moves in the radial direction, the push-up piece 5 of the piece moves in the radial direction.
A paper tube cap crimping device in which the other piece is also moved in the radial direction by being pushed up by the second piece.