JPS623521Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a fluid pressure cylinder device.

An object of the present invention is to provide a linear intermittent constant feed fluid pressure cylinder device used to intermittently linearly feed a linear moving body or the like used for indexing, separation and distribution of parts, etc. by a predetermined amount.

This object, according to the invention, includes a frame body, a first rod slidably guided by the frame body along an axis and extending along the axis, and a first rod disposed therein in a direction along the axis. a first member having a cylinder chamber extending to the frame; a piston that is slidably disposed along the axis with respect to both the frame body and the first member and engages with the cylinder chamber; a second member having a second rod extending from the piston along the axis to the outside of the cylinder chamber, and inside the cylinder chamber there are first and second rods on both sides in the axial direction of the piston, respectively. two cylinder chambers are defined; further fluid passage means each independently communicating with the first and second cylinder chambers; first and second stopper plates that are provided to be tiltable around a fulcrum fixed to the frame body at positions separated from the first and second rods; first and second springs flexibly biasing each of the stopper plates so that one edge thereof slides into engagement with the outer peripheral surfaces of the first and second rods, respectively; selectively acts independently on each of the first and second members and engages the frame body only for movement of each of the first and second members in the same one direction along the axis; This is achieved by a fluid pressure cylinder device characterized in that it is provided with a one-way locking means for stopping.

In the linear intermittent constant feed fluid pressure cylinder device as described above, the frame body is further configured to have one cylinder extending along the frame axis, and the first member is connected to the cylinder. By forming a piston structure that is slidable along the axis, defining cylinder chambers on both sides of the piston structure in the axial direction, and providing fluid passage means communicating with each of the cylinder chambers, The fluid pressure cylinder device can be configured as a device capable of performing fast forwarding or fast reversing in the advancing direction or the returning direction in addition to performing the linear intermittent constant feed operation as described above.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

The accompanying drawing is a longitudinal cross-sectional view showing one embodiment of the fluid pressure cylinder device according to the present invention. In the figure, 1 indicates an outer cylinder assembly. The outer cylinder assembly 1 consists of a cylindrical cylinder tube 2 and end covers 3 and 4 that close both ends of the cylinder tube 2. These outer cylinder assembly 1 and end covers 3 and 4 together constitute a frame that supports the entire fluid pressure cylinder device. The end cover 3 also serves as a mounting flange and has mounting bolt holes 5. The cylinder tube 2 includes a first member that slides along one axis relative to the frame. An inner cylinder assembly 6 is fitted to be slidable in the axial direction thereof. Inner cylinder assembly 6
A cylindrical cylinder body 7 with only one end closed and a cover 8 that closes the other open end of the cylinder body 7.
, and outer cylinder chambers 9 and 10 are defined on both sides thereof. The outer cylinder chamber 9 is connected to a port 14 provided in a cover 12, which will be described later, through a passage 11 formed in the end cover 3. Further, the outer cylinder chamber 10 is connected to a port 15 provided in the end cover 4. The cylinder body 7 integrally has a rod 16 extending in the axial direction. In other words, it protrudes to the right in the figure.

A piston 20 is fitted into the inner cylinder assembly 6 so as to be slidable in the axial direction thereof. The piston 20 has inner cylinder chambers 21 and 22 on both sides thereof.
It is defined that The piston 20 has a constant axially extending rod 23, which is connected to a hole 24 provided in the cover 8, an outer cylinder chamber 9, and a hole 2 provided in the end cover 3.
5. Projects outward through the chamber 26 and hole 27 of the cover 12, that is, to the left in the figure. The rod 23 also has a threaded portion 28 at its protruding tip for connecting an actuator (not shown). The piston 20 and the rod 23 together constitute a second member that is movable in the axial direction with respect to both the frame and the first member. The inner cylinder chamber 21 is connected to a port 30 provided near the tip of the rod 23 via a passage 29 provided in the piston 20 and the rod 23. The inner cylinder chamber 22 is connected to a port 3 provided near the tip of the rod 16 via a passage 31 provided in the cylinder body 7 and the rod 16.
Connected to 2.

The covers 12 and 13 are each attached to the outside of the end covers 3 and 4 and cooperate with the end covers to define the chambers 18 and 26, respectively. Inside the chambers 18 and 26 are annular stopper plates 33 that fit around the outer peripheries of the rods 16 and 23, respectively.
34 are provided. stopper plate 33,
34 are fixed pins 35, 36 and springs 37, 3, respectively.
8. In the free state, the rods 16 and 23 are held tilted as shown in the figure by movable pins 39 and 40 to prevent them from moving to the right in the figure, and to prevent them from moving to the left in the figure. They are now only allowed to move. The movable pin 39 is carried by a piston 41 which fits within a small cylinder chamber 42 and is thereby adapted to be selectively driven in its axial direction. The small cylinder chamber 42 is a passage 1 provided in the cover 13 and the end cover 4.
3', and is connected to the port 14 via a conduit 43. Further, the movable pin 40 is carried by a piston 45 fitted within the small cylinder chamber 44, thereby selectively driving it in its axial direction. The small cylinder chamber 44 is in direct communication with the outer cylinder chamber 9.

In addition, cylinder tube 2, end cover 3,
4. The covers 12 and 13 are fastened by a through bolt 46 and a nut 47 screwed into the through bolt 46.

Next, the operation of the fluid pressure cylinder device constructed as described above will be explained. The figure shows the inner cylinder assembly 6 and the piston 20 in their respective retracted positions. In the situation described above,
First, port 30 is set to drain state, and port 3
2 supplies fluid pressure such as hydraulic pressure or air pressure into the inner cylinder chamber 22. Then, since the inner cylinder assembly 6 is prevented from moving to the right in the figure by the stopper plate 33, the piston 20 advances to the left in the figure relative to the inner cylinder assembly 6. This forward movement is continued until one end surface of the piston 20 comes into contact with the end surface of the cover 8. That is, the piston 20 moves forward by a length L from its retracted position and then stops. As a result, rod 2
3 also moves forward by a length L from its starting position and then stops.

Next, set port 32 to the drain state, and
Fluid pressure is supplied to the inner cylinder chamber 21 from 0. Then, the piston 20 moves to the stopper plate 3.
4 prevents the inner cylinder assembly 6 from moving to the right in the figure, so the inner cylinder assembly 6 advances to the left in the figure. This movement of the inner cylinder assembly 6 is continued until the end surface of the cylinder body 7 comes into contact with the end surface of the piston 20. Inner cylinder assembly 6 includes piston 20 and outer cylinder assembly 1
In contrast, it moves forward by a length L to the left in the figure and stops.

Then, the port 30 is brought into the drain state again, and fluid pressure is supplied to the inner cylinder chamber 22 from the port 32. Then, the piston 20 moves forward again by a length L to the left in the figure and stops.

By repeating the above-described operation, the rod 23 is repeatedly and intermittently fed by the length L. This intermittent feeding continues until the inner cylinder assembly 6 moves forward within the cylinder tube 2 and its cover 8 comes into contact with the end cover 3.

During intermittent feeding as described above, the ports 14 and 15 are in the drain state. When returning the rod 23, fluid pressure is supplied to the port 14. Then, the outer cylinder chamber 9, the small cylinder chamber 42,
Fluid pressure is supplied to each of the pistons 41, 44,
45 move to the left in the figure, and the stopper plates 33 and 34 rotate about their engagement ends with the fixing pins 35 and 36 as fulcrums against the action of the springs 37 and 38, which in turn causes the rods 16 and 23, so that the stop plate allows the rods 16, 23 to move in either axial direction. Further, at this time, the fluid pressure introduced into the outer cylinder chamber 9 acts on the inner cylinder assembly 6, causing it to move to the right in the figure. This causes the inner cylinder assembly 6 to return to the return and retracted position as shown.

supply of fluid pressure to port 14 is stopped;
When this port is placed in the drain state, the stopper plates 33, 34 return to the inclined position as shown in the figure by the action of the springs 37, 38, and perform the check action again.

Further, when the rod 23 is rapidly moved to the left in the figure, fluid pressure may be supplied into the outer cylinder chamber 10 from the port 15.

In the above embodiment, the stopper plates 33 and 34 are used as the check device. The check device itself, which performs such a check function, is compliant with JIS
As defined in E3013 as a "one way lock," this device has been known in various configurations in the past, but the present invention is not limited to this, and other check devices that perform the same function may also be used.

In the above, the present invention has been described in detail with reference to specific embodiments, but it will be appreciated by those skilled in the art that the present invention is not limited to this and that various embodiments are possible within the scope of the present invention. It should be obvious.

[Brief explanation of the drawing]

The accompanying drawing is a longitudinal cross-sectional view showing one embodiment of the fluid pressure cylinder device according to the present invention. 1...Outer cylinder assembly, 2...Cylinder tube, 3, 4...End cover, 5...Mounting bolt through hole, 6...Inner cylinder assembly,
7...Cylinder body, 8...Cover, 9, 10...
... Outer cylinder chamber, 11 ... Passage, 12, 13
...cover, 13'...passage, 14,15...port, 16...rod, 17...hole, 18...
Chamber, 19... Hole, 20... Piston, 21, 22
... Inner cylinder chamber, 23 ... Rod, 24,
25...hole, 26...chamber, 27...hole, 28...
Threaded portion, 29...passage, 30...port, 31...
...Passway, 32...Port, 33,34...Stopper plate, 35,36...Fixing pin, 37,3
8... Spring, 39, 40... Movable pin, 41...
Piston, 42... Small cylinder chamber, 43... Conduit, 44... Small cylinder chamber, 45... Piston,
46...Bolt, 47...Natsuto.

Claims (1)

[Scope of utility model registration request] a first rod having a frame body, a first rod slidably guided along one axis by the frame body and extending along the axis line, and a cylinder chamber inside thereof extending in the direction along the axis line; a piston that is slidably disposed along the axis with respect to both the frame body and the first member and engages with the cylinder chamber; a second member having a second rod extending to the outside of the piston, and first and second cylinder chambers are defined in the interior of the cylinder chamber on both sides in the axial direction of the piston, respectively. Further, fluid passage means each independently communicating with the first and second cylinder chambers, and extending obliquely with respect to an imaginary plane perpendicular to the axis, respectively, to the sides of the first and second rods. first and second stopper plates that are tiltably provided around a fulcrum fixed to the frame body at positions separated from this; and one edge of each of the first and second stopper plates. first and second springs flexibly biasing each of the first and second members into sliding engagement with the outer peripheral surfaces of the first and second rods, respectively; single locking means that acts independently and selectively to lock each of the first and second members to the frame only against movement in one and the same direction along the axis; A fluid pressure cylinder device characterized by: