JP2001182708A - Dual stroke cylinder apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dual stroke cylinder apparatus which occupies narrow installation space in its stroking direction. SOLUTION: Two cylinder main bodies 10, 11, respectively having piston rod 12, 13 that extend in the reverse directions, are integrated and juxtaposed parallel, and can integrally slide along rails 16 in their axial direction relative to a base 15. The head of the piston rod 12 of the cylinder main body 10 is fixed to the base 15 so that the juxtaposed cylinder main bodies 10, 11 can be reciprocated integrally by telescopic motion of the piston rod 12. The piston rod 13, which is not fixed to the base 15, is connected to a slider 17, and the slider 17 can slide along the rails 18 with respect to the juxtaposed cylinder main bodies 10, 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual stroke cylinder device which can make a stroke in two stages.

[0002]

2. Description of the Related Art As a conventional dual-stroke cylinder device capable of making a stroke in two stages by using two cylinders, as shown in FIG. And the two piston rods 3 and 4 project coaxially in opposite directions, and, as shown in FIG. 2, two cylinder bodies 1 and 2 having different strokes from each other.
2 are connected in series in the same direction back and forth, and the piston rod 4 of the rear cylinder body 2 is pushed into the front cylinder body 1 to push the piston of the front cylinder body 1.

[0003]

However, in each of these conventional examples, since the two cylinder bodies are connected in series, the total length of the cylinder bodies is increased, and the installation space in the stroke direction (axial direction) is large. There was a problem of becoming.

It is an object of the present invention to provide a dual stroke cylinder device which can reduce the installation space in the stroke direction.

[0005]

A dual-stroke cylinder device according to the present invention has at least two cylinder bodies having piston rods projecting in opposite directions to each other, and is arranged in parallel and in parallel to a rail with respect to a base. Slidable integrally in the axial direction along the axis, the tip of the piston rod of one cylinder body is fixed to the base, and the cylinder bodies arranged side by side can be moved forward and backward along the rail by expansion and contraction of the piston rod. It is characterized by doing so.

If a slider is connected to a piston rod that is not fixed to the base and a rail for guiding the sliding of the slider is provided on the cylinder body arranged in parallel, the slider can be slid in two strokes.

The power of the cylinder bodies having the same piston rod projection direction can be increased by connecting the tips of the piston rods to each other.

[0008]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIGS. 3 to 6 show a first embodiment of the present invention.
In this dual-stroke cylinder device, the two cylinder bodies 10 and 11 are arranged in parallel to each other in opposite directions so that the piston rods 12 and 13 of these two cylinder bodies 10 and 11 project in opposite directions. It has become.

[0010] Two cylinder bodies 10 arranged integrally and side by side
11 is a rectangular block as a whole, and the guide groove 14 on the lower surface thereof is slidably fitted to the rail 16 on the upper surface of the base 15 so that it slides integrally on the base 15 in the axial direction. It is free. Then, the tip of the piston rod 12 of one cylinder body 10 is connected to the base 1
5 is fixed to a fixing portion 15a protruding from the upper surface of the cylinder body 5.
0.11 itself moves forward and backward integrally along the rail 16 in the axial direction.

On the other hand, the tip of the piston rod 13 of the other cylinder body 11 is connected to a plate-shaped slider 17. A rail 18 is provided on the lower surface of the slider 17, and this rail 18 is attached to the cylinder body 10.
1 is slidably fitted in a guide groove 19 provided on the upper surface of the piston rod 1 so that the slider 17
As the cylinder 3 expands and contracts, it moves forward and backward in the axial direction along the guide groove 19 (rail 18) with respect to the cylinder bodies 10 and 11.

Guide groove 14, rail 16, and guide groove 19
The rail 18 has a dovetail groove and a dovetail relationship (trapezoidal cross section) having sufficient strength to sufficiently support a large load and moment applied to the cylinder bodies 10 and 11 and the slider 17. The cylinder body 10
A rail is provided on the 11 side, and the base 15 and the slider 17 are provided.
A guide groove may be provided on the side.

According to the dual-stroke cylinder device having the above structure, when the piston rod 12 of one cylinder body 10 is extended, the cylinder bodies 10
Move forward along the rail 16 integrally in the axial direction, and the slider 17 also moves forward. Next, when the piston rod 13 of the other cylinder body 11 is extended, the slider 1
7 advances in the axial direction along the guide grooves 19 with respect to the cylinder bodies 10 and 11, so that the work W placed on the slider 17, for example, can be transported in a two-stage stroke.

FIG. 7 shows a second embodiment of the present invention, in which guide cylinders 20 and 21 having openings opposite to each other as rails are arranged in parallel on both sides of two cylinder bodies 10 and 11 integrally arranged in parallel. The piston rod 12 of the one cylinder main body 10 is connected to one of the guide rods 22 slidably fitted to the one of the guide cylinders 20 by a connecting member 23 at a tip end thereof,
The piston rod 13 of the other cylinder body 11 is
One end of the guide rod 24 slidably fitted to the other guide cylinder 21 is connected to the other end thereof by a connecting member 25, and the cylinder body 10.
11 and the sliding stability of the slider as described above is improved.

FIG. 8 shows a third embodiment of the present invention, in which two cylinder bodies 11a and 11b, which are opposite to each other, are arranged in parallel on both sides of a central cylinder body 10, and cylinders of the same direction are arranged. Piston rod 13a of main bodies 11a and 11b
13b are connected to each other by a connecting member 26; By doing so, the cylinder body 11a having the same orientation
By providing two 11b, the thrust in that direction can be increased, and the generation of moment can be suppressed by connecting the tips of the piston rods 13a and 13b.

[0016]

As described above, according to the present invention, two cylinder bodies which are opposite to each other are integrally arranged in parallel and in parallel, and the piston rod whose tip is fixed to the base is expanded and contracted. Since the juxtaposed cylinder bodies can be integrally moved back and forth along the rails, the installation space in the stroke direction can be reduced as a dual-stroke cylinder device capable of performing two strokes.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a conventional example.

FIG. 2 is a schematic sectional view of another conventional example.

FIG. 3 is an overall side view of the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is an overall plan view of the first embodiment.

FIG. 6 is a sectional view of two cylinder bodies arranged side by side in the first embodiment.

FIG. 7 is a plan view of the second embodiment.

FIG. 8 is a sectional view of a third embodiment.

[Explanation of symbols]

 10.11 Cylinder main body 12.13 Piston rod 14 Guide groove 15 Base 15a Fixed portion 16 Rail 17 Slider 18 Rail 19 Guide groove 20/21 Guide cylinder 22 Guide rod 23 Connecting member 24 Guide rod 25 Connecting member 26 Connecting member

Claims (3)

[Claims] At least two cylinder bodies having the piston rods projecting in opposite directions are integrally arranged in parallel and parallel to each other, and are slidable integrally with the base in the axial direction along the rail. A dual stroke cylinder device characterized in that the tip of a piston rod of the cylinder body is fixed to the base, and the cylinder bodies arranged side by side can be integrally advanced and retracted along a rail by expansion and contraction of the piston rod. . 2. A slider connected to a piston rod that is not fixed to a base, the slider being slidable along a rail with respect to a cylinder body arranged in parallel. Dual stroke cylinder device. 3. The dual stroke cylinder device according to claim 1, wherein the cylinder rods having the same protruding direction of the piston rods are connected to each other at the tips of the piston rods.