JPH087952Y2 - Riveting machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riveting machine for bending the circumference of a tubular body and fixing the tubular body and a cover plate fitted therein.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a lid plate 33 is dropped into an annular step portion 32 provided on the entire inner surface of an end edge of a tubular body 31, and then, as shown in FIG. A riveting machine as shown in FIG. 3 is used to bend the entire outer edge of the end edge annular stepped portion 31 of the member 31 inwardly to form the hugging bent portion 34 of the lid plate 33.

As shown in FIG. 3, the riveting machine is
A column 3 is erected on a pedestal 1 with a table 2 on which a tubular body is placed, and a spindle 6 that is rotated by a motor 4 and moves up and down by the expansion and contraction of a cylinder 5 is provided on the column 3. The spindle 6 is supported so as to pass through the axis of the piston shaft 7 of the cylinder 5 and ascend and descend together. The motor 4 is installed on the upper end of the piston shaft 7 so as not to rotate, and ascends and descends together with the piston shaft 7. And the lower end of the spindle 6
A molding tool 9 having a plurality of molding rollers 8 is provided.

In order to process the cylindrical body with the above-mentioned riveting machine, as shown in FIG. 4, the cylindrical body 31 in which the cover plate 33 is fitted in advance is fixed on the table 2 in FIG. Next, by extending the cylinder 5, the spindle 6 rotated by the motor 4 and the molding tool 9 are lowered, and the molding roller 8 is pressed against the upper end edge of the cylindrical body 31. Bend the upper edge of the
As shown in FIG. 5, the hugging bent portion 34 of the lid 33 can be formed to fix the lid plate 33 to the tubular body 31.

By the way, when the hugging bent portion 34 is formed at the upper end edge of the tubular body 31, the lid plate 33 can freely move up and down if the lid plate 33 is simply dropped into the tubular body 31. When the bending portion is formed while the lid plate 33 is vertically moved due to the vibration during the forming, the lid plate 33 floats from the bottom surface of the annular step portion 32, which causes rattling of the lid plate 33. Will occur.

In order to prevent such rattling of the lid plate 33, a conventional riveting machine, as shown in, for example, Japanese Utility Model Application Laid-Open No. Sho 64-20916, uses a pin for holding the lid at the center of the rotary shaft of the molding tool. Is movably up and down, and a spring presses down the pin to elastically push the lid plate down with the pin to securely contact the bottom surface of the annular step when forming the bent part of the tubular body with the molding roller. The means to make it adopted.

[0007]

By the way, since the pin in the above-mentioned conventional molding tool has a structure of rotating integrally with the molding tool, when the pin comes into contact with the lid plate, the pin is rotated together with the lid plate. If the phenomenon occurs and the lid plate is directional,
There is a problem that displacement occurs with respect to the tubular body.

Further, when the lid plate is fixed by pressing the bent portion, slip occurs at the contact portion between the pin and the lid plate, and the lid plate is damaged.

Therefore, an object of the present invention is to provide a riveting machine which can press and fix the cover plate without causing co-rotation and scratches when forming the bent portion of the cylindrical body.

[0010]

In order to solve the above-mentioned problems, the present invention provides a through hole which vertically penetrates along the axis of the molding tool and the spindle, and prevents the push pin from rotating in the through hole. In this configuration, a structure is employed in which the push pin is inserted in a penetrating manner so as to be movable up and down, and a cylinder for moving the push pin up and down with respect to the spindle is connected to a portion of the push pin protruding from the spindle.

[0011]

Operation: With the tubular body fitted with the lid plate fixed on the table using a jig, pressure in the extension direction is applied to the cylinder to lower the molding tool together with the spindle. The lower end of the push pin pressed down by the cylinder comes into contact with the center of the upper surface and presses in the lid plate, and the cylinder is controlled for continuing the descent of the molding tool to keep the lid plate pressed down by the push pin. When the molding roller comes into contact with the upper end edge of the tubular body, the upper edge of the tubular body is bent inward by the turning of the molding roller to form a bent portion that holds the peripheral edge of the lid plate.

Since the push pin has a non-rotating shape with respect to the spindle, when the cover plate is pressed in, the cover plate does not rotate, and the push pin contacts with the push pin. No scratches occur.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings.

As shown in FIGS. 1 and 2, the spindle 6 is rotatably supported by the piston shaft 7 of the cylinder 5, and the cylinder 5
The piston shaft 7 and the spindle 6 are integrally moved up and down by the supply and discharge of the pressure fluid to and from which the motor 4'is installed on the support plate 22 fixed to the upper end of the piston shaft 7. The output shaft of the motor 4 ' And the upper end of the spindle shaft 6 protruding above the support plate 22 is interlocked by the rotation transmitting means 21 using a pulley and a belt, and rotation is imparted to the spindle shaft 6 that moves up and down together with the piston shaft 7. There is.

As in the riveting machine shown in FIG. 3, as shown in FIG. 1, the cylinder 5 is fixed to the upper end of the column 3 in a vertical arrangement, and the cylindrical body is provided immediately below the extension line of the lower end of the spindle 6. The table 2 to be placed and fixed is located.

A molding tool 9 is attached to the lower end of the spindle 6 protruding from the piston shaft 7 so as to rotate integrally therewith. In this molding tool 9, a pair of molding rollers 8, 8 are rotatably mounted on respective shafts 10 at positions on both sides of the lower part so that the molding rollers 9 face each other with the rotation shaft center of the molding tool 9 in an upwardly spread shape.

The molding tool 9 and the spindle 6 are provided with a through hole 16 which vertically penetrates along the axis, and which communicates with each other.
A long push pin 11 is vertically inserted through the through hole 16.

The push pin 11 is supported by a bearing 17 provided on the spindle 6 and the molding tool 9 so as to be movable up and down with respect to the spindle 6, and a cylinder 18 is connected to a portion protruding upward from the upper end of the spindle 6. , Spindle 6
The vertical movement is given to.

The cylinder 18 is fixed to a mounting seat 19 which moves up and down together with the piston shaft 7, and the cylinder 1
8 and the push pin 11 are in a rotation stop state by a rotation stop metal fitting 20 provided on the mounting seat 19.

Therefore, when the piston shaft 7 of the cylinder 5 moves up and down, the spindle 6, the motor 4 ', the cylinder 18,
The molding tool 9 and the push pin 11 move up and down together,
When the motor 4'starts up, the spindle 6 and the molding tool 9 rotate, and further the cylinder 18 operates so that only the push pin 11 moves up and down independently in a non-rotating state.

FIG. 2 shows the state in which the piston shaft 7 is most lowered with respect to the cylinder 5, and the push pin 11
Is also at the lower limit position, the lower end thereof penetrates vertically between both molding rollers 8, 8 of the molding tool 9, and the lower end thereof is located below the lower ends of the molding rollers 8, 8.

The riveting machine of the present invention is constructed as described above, and the lid plate 33 is fitted to the bending portion 34 at the upper end portion of the cylindrical body 31 shown in FIG. 4 as shown in FIG. The hollow cylindrical body 31 is fixed on the table directly below the molding tool 9 by using a jig, and in this state, the motor 4'is activated to rotate the spindle 6 and the molding tool 9, and apply pressure fluid to the cylinder 5. It is supplied and the spindle 6 and the molding tool 9 are moved down together with the piston shaft 7.

At this time, the push pin 11 is connected to the cylinder 18
The pressure fluid is supplied to the lower limit position shown in FIG.

When the molding tool 9 descends, first, the lower end of the pressing pin 11 abuts on the lid plate 33 and presses it against the bottom of the annular step portion 32. At this time, since the presser pin 11 is non-rotating, the cover plate 33 does not rotate.

In this state, the molding tool 9 further descends, and the lower parts of the outer peripheral molding grooves of the molding rollers 8 and 8 facing each other in an upwardly widened inclined shape abut on the upper end portion of the cylindrical body 31 to rotate and descend. As a result, the periphery of the upper end of the tubular body 31 is bent inward.

Since the lid plate 33 is fixed by pressing it down by the pressing pin 11, it does not float from the annular step portion 32 due to vibration or the like, and the bent portion 34 ensures that the lid plate 33 is fixed to the tubular body 31. It is fixed.

Since the presser pin 11 is in the non-rotating state, the cover plate 33 is not damaged and the cover plate 3 is not damaged.
While the push pin 11 holding 3 is stopped, the molding tool 9, the spindle 6 and the like are moved downward, so that the differential between them may control the fluid under pressure in the cylinder 18.

After the bending portion 34 is molded, the piston shaft 7 of the cylinder 5 returns to the raised position, the molding tool 9 separates from the tubular body 31, and the push pin 11 returns to the lowered position with respect to the spindle shaft 6. It will be ready for the next molding.

[0029]

As described above, according to the present invention, the push pin vertically penetrating along the axis of the molding tool and the spindle can be moved up and down in a non-rotating state, and the push pin can be moved by the cylinder. Since it is configured to move up and down with respect to the spindle, when the lid plate is fixed by bending the upper end of the tubular body in which the lid plate is fitted, the lid plate can be pressed with the press pin immediately before molding. Since the cover plate is not fixed in the floating state and the pressing pin is in the non-rotating state, it is advantageous for fixing when the cover plate does not rotate and the cover plate has directionality.

Further, since the push pin is prevented from rotating, the portion of the lid plate that comes into contact with the push pin is not damaged.

Therefore, it is possible to eliminate the problem that the cover plate is rotated together and the push pin contact portion of the cover plate is damaged.

[Brief description of drawings]

FIG. 1 is a side view of a riveting machine according to the present invention.

FIG. 2 is a vertical sectional side view of the above.

FIG. 3 is a side view showing a conventional riveting machine.

FIG. 4 is a vertical cross-sectional front view of a tubular body with a cover plate dropped in.

[Fig. 5] A vertical sectional front view in which the lid plate is enclosed.

[Explanation of symbols]

 4'motor 5 cylinder 6 spindle 7 piston shaft 8 molding roller 9 molding tool 11 push pin 16 through hole 18 cylinder

Claims (1)

[Scope of utility model registration request] 1. A molding tool holding a plurality of molding rollers is attached to the lower end of a spindle which is rotated by a motor and is vertically moved by the action of a cylinder.
A table for supporting a cylindrical body having a cover plate dropped on the inner peripheral annular step portion of the end edge is provided at a position immediately below, and the molding portion of the molding roller is formed on the upper end edge of the cylindrical body by lowering the spindle. In the riveting machine in which the upper edge of the cylindrical body is bent inward by the turning of the forming roller to form a bent portion that holds the peripheral edge of the lid plate, the forming tool and the spindle Up along the axis of
A through hole is provided at the bottom, and the push pin is prevented from rotating in this hole.
Insert it in a penetrating shape so that it can move up and down freely,
This spindle is located on the part protruding from above the spindle.
A riveting machine characterized by connecting a cylinder for moving a push pin up and down with respect to the .