JPH0244911Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a device for adjusting the descending stroke of a rivet head forming tool in a rivet head crimping machine.

[Conventional technology]

The conventional stroke adjustment device for a caulking machine has a cylinder 2 supported by a column 1 as shown in FIGS. 5 and 6, and a motor 4 installed on the upper end of a piston shaft 3 of the cylinder 2.
The upper end of the spindle 5, which is supported through the axis of the piston shaft 3, engages with the output shaft 6 of the motor 4, and the lower end is rotatably held at the upper end of the cylinder 2. An operating rotary cylinder 8 having a threaded portion 7 on the inner periphery is provided, and an annular nut plate 9 screwed into the threaded portion 7 is fitted on the outside of the piston shaft 3. A long hole 1 is provided upward from the lower surface of the upper end flange portion 12 of the upright pin 10 and the piston shaft 2.
1 are fitted together, and the operation rotary cylinder 8
When the nut plate 9 is rotated, the nut plate 9 is prevented from rotating by the pin 10 and the elongated hole 11, so the nut plate 9 is raised or lowered depending on the direction of rotation of the operation rotary cylinder 8.

As a result, the distance between the flange portion 12 and the nut plate 9 is changed, that is, the lowering position of the piston shaft 3 is changed due to the contact between the upper surface of the nut plate 9 and the lower surface of the flange portion 12, and the stroke can be adjusted.

[Problem that the invention attempts to solve]

The piston shaft and the motor are directly connected, and the motor descends together with the piston shaft due to the extension of the cylinder, so that fingers or the like can be caught between the upper edge of the operating rotary cylinder and the motor mounting flange. This caused problems in terms of safety.

[Means for solving the problem] In order to solve the above problem, this invention installs the motor at the upper end of the cylinder via a spacer, and connects the upper end of the spindle and the output shaft of the motor via an expansion joint. In addition, the lower end of the operating rotary cylinder fitted on the outside of the spacer is rotatably attached to the upper end of the cylinder, a threaded portion is provided on the inner circumference of the operating rotary cylinder, and an annular plate is fitted to the upper outer side of the piston shaft. The protruding member protruding from the outer periphery of the annular plate is passed through the spacer so that its movement in the vertical direction is not inhibited, and the threaded part provided at the tip thereof is screwed into the threaded part. It is constructed by providing a protrusion that comes into contact with the annular plate when the piston shaft descends.

[Effect]

When adjusting the stroke of the piston shaft, when the operation rotary cylinder is rotated, the annular plate is raised or lowered by the threaded portion.

As a result, the distance between the annular plate and the protrusion changes, changing the downward stroke of the piston shaft.

〔Example〕

In the figure, 21 is a column that stands up from a base 22, and a cylinder 23 is supported at the upper end of this column 21.

Further, a spindle 25 is provided at the axis of the piston shaft 24, which is moved up and down by the contraction and expansion of the cylinder 23, and is supported so as to pass through the piston shaft 24 and rotate freely at a fixed position.

Further, a rivet head forming tool 26 is provided at the lower end of the spindle 25.

Although the detailed structure of the above-mentioned rivet head forming tool 26 is not shown because it is publicly known, the center of the lower end forming surface of the forming shaft 27 that rotates and swings by tilting the axis coincides with the axis of the spindle 25. I've let it happen.

In addition, a spacer 2 is placed directly above the cylinder 23.
A motor 29 is installed through the motor 8, and an output shaft 30 of the motor 29 is connected to the spindle 2.
5, the transmission is made via an expansion joint 31.

In the illustrated case, the above-mentioned expansion joint 31 is constructed of a square shaft and a square hole that are slidably fitted together and that transmit rotation, but it may be configured to transmit rotation using other configurations.

32 is fitted on the outside of the spacer 28 and output 2
3 is an operating rotary cylinder whose lower edge is rotatably attached to the upper end of the operating cylinder 32, and a threaded portion 33 is provided on the inner periphery of the operating rotary cylinder 32.
is provided.

In the case shown in the figure, the operation rotary cylinder 32 is attached by dividing the ring 34 into the required number of parts and fixing them to the upper end of the cylinder 23.
5 and an annular groove 3 provided on the outer periphery of the operating rotary cylinder 32.
6 are fitted together.

Reference numeral 37 denotes an annular plate fitted on the outside of the upper part of the piston shaft 24. A protruding member 38 is provided on the periphery of the annular plate 37 to pass through the spacer 28 so that vertical movement is not inhibited. The threaded portion 39 provided in the threaded portion 33
When screwed in and rotate the operation rotary cylinder 32,
The annular plate 37, which is prevented from rotating by the protruding member 38 in contact with the spacer 28, is raised and lowered by the threaded portions 33 and 39.

In addition, the above-mentioned protruding member 38 is made to protrude in four directions in the case shown in the figure, and each is connected to the cylindrical spacer 28.
The rotation of the annular plate 37 was prevented by the contact between the edge of the elongated hole 40 and the edge of the protruding member 38, but the spacer was The protruding member may be brought into contact with the pillar material.

Further, the upper end of the piston shaft 24 is provided with a protrusion 41 that comes into contact with the upper surface of the annular plate 37 when the piston shaft 24 is lowered.
7, the downward stroke of the piston shaft 24 is regulated.

Stroke change (adjustment) of the above piston shaft 24
This is performed by raising and lowering the annular plate 37 by rotating the operation rotary cylinder 32.

In the figure, reference numeral 42 denotes a table positioned directly below the rivet head forming tool 26 and adjustable up and down.

〔effect〕

As described above, according to the stroke adjustment device for a caulking machine according to this invention, a motor is installed at the upper end of the cylinder via a spacer, and the output shaft of this motor is passed through and supported by the axis of the piston shaft. The upper end of the spindle is connected to the upper end of the cylinder via an expansion joint, and as the operating rotary tube provided at the upper end of the cylinder rotates, the annular plate is raised and lowered by the inner thread of the operating rotary tube and the threaded end of the protruding member. Since the stroke of the piston shaft is regulated by the contact between the annular plate and the protrusion, the motor can be of a stationary type and only the piston shaft can be moved up and down.

This eliminates accidents such as fingers or the like being caught between the upper edge of the operating rotary cylinder and the mounting flange of the motor, which is effective in terms of safety.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of the stroke adjustment device according to this invention, Fig. 2 is a sectional view taken along the line of Fig. 1, Fig. 3 is a longitudinal side view showing the main parts of the same, and Fig. 4 is a longitudinal sectional view of the stroke adjusting device according to the invention.
The figure is a side view of a caulking machine, FIG. 5 is a side view of a conventional caulking machine, and FIG. 6 is a longitudinal sectional side view of the stroke adjusting device. 21... Seating material, 22... Column, 23... Cylinder, 24... Piston shaft, 25... Spindle, 26... Rivet head forming tool, 28... Spacer, 29... Motor, 30... Output shaft , 31...
...Expansion joint, 32...Operation rotary cylinder, 33, 39...
...screw part, 37... annular plate, 38... protruding member,
40...Long hole, 41...Protrusion.

Claims (1)

[Scope of utility model registration request] By the extension of the cylinder supported by the column, the spindle, which is supported by passing through the axis of the piston shaft together with the piston shaft, is lowered, and the forming shaft of the rivet head forming tool provided at the lower end of this spindle is lowered. In a caulking machine that presses the item against the rivet shaft of an item placed on a table and drives the spindle with a motor to form the rivet head on the rivet shaft, the motor is installed at the top of the cylinder via a spacer, and the top of the spindle is and the output shaft of the motor are connected via an expansion joint,
In addition, the lower end of the operating rotary cylinder fitted on the outside of the spacer is rotatably attached to the upper end of the cylinder, a threaded portion is provided on the inner circumference of the operating rotary cylinder, and an annular plate is fitted on the upper outer side of the piston shaft. , the protruding member protruding from the outer periphery of the annular plate is passed through the spacer so that vertical movement is not inhibited,
A stroke adjusting device for a caulking machine, characterized in that a threaded portion provided at the tip thereof is screwed into the threaded portion, and a protrusion is provided at the upper end of the piston shaft to come into contact with an annular plate when the piston shaft is lowered.