JP2000027809A - Rodless cylinder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop a slider at a middle part when a cylinder main body of a rodless cylinder is fixed on a determined position. SOLUTION: A fluid is selectively supplied to a pair of ports 8, 9 formed on both covers 3, 4 of a rodless cylinder 1, and thereby, a piston 5 is moved, and a slider 10 is selectively switched and arranged to a stroke end of both ends following it. Accordingly, the rodless cylinder 1 is fixed on a determined position. An intermediate stopping cylinder 21 is arranged on a cover 4 for composing a part of cylinder main bodies 2, 3, 4 of the rodless cylinder 1, and a piston rod 31 extending from the cylinder 21 is projected/retracted from/in a cylinder tube 2. A tip end of the piston rod 31 abuts the piston 5 in a condition in which the piston rod 31 is projected into the cylinder tube 2, and the slider 10 is stopped at an intermediate stopping position between both stroke ends.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rodless cylinder device having a basic configuration of a rodless cylinder.

[0002]

2. Description of the Related Art Among the fluid pressure cylinders, a rodless cylinder, in particular, has an advantage that a long stroke can be achieved without taking up installation space due to a structure that does not require a piston rod protruding outside the longitudinal direction of a cylinder tube. It has.

However, in a general rodless cylinder, the slider can be normally stopped only at two positions at the stroke end because the fluid pressure acts on the pressure chambers on both sides of the piston for driving.

[0004] In order to enable an apparent intermediate stop, a rodless cylinder device as shown in FIG. 8 has been proposed. That is, the slider 63 can selectively take two positions at the stroke end in the cylinder body 62 of the rodless cylinder 61 by the fluid pressure. The cylinder body 62 has another auxiliary cylinder 6
The piston rod 6 protruding from the cylinder body 65 of No. 4
6 are connected. And the auxiliary cylinder 64
Is fixed at a predetermined position, and the cylinder body 62 of the rodless cylinder 61 is in a non-fixed state.

In this rodless cylinder device, FIG.
As shown in (a), the slider 63 of the rodless cylinder 61 is set to the stroke end position on the auxiliary cylinder 64 side in a state where the piston rod 66 of the auxiliary cylinder 64 is retracted to the cylinder body 65 side, so that the slider 63 is arranged at the first position.

[0008] As shown in FIG. 8 (b), the slider 63 of the rodless cylinder 61 is moved to the stroke end on the side opposite to the auxiliary cylinder 64 in a state where the piston rod 66 of the auxiliary cylinder 64 is in a position protruding from the cylinder body 65. By setting the position, the slider 63 is arranged at the second position.

Further, as shown in FIG. 8C, the slider 63 of the rodless cylinder 61 is moved to the stroke end position on the auxiliary cylinder 64 side with the piston rod 66 of the auxiliary cylinder 64 projecting from the cylinder body 65. By doing so, the slider 63 is arranged at the third position.

Accordingly, the piston rod 6 of another auxiliary cylinder 64 is attached to the cylinder body 62 of the rodless cylinder 61.
By connecting 6 in series, the slider 63 apparently stops intermediately at the third position between the first position and the second position.

[0009]

However, in the above-mentioned conventional rodless cylinder device, in order to realize an apparent intermediate stop, the cylinder body 62 of the rodless cylinder 61 is attached to the piston rod 66 of the auxiliary cylinder 64 provided separately. Is connected and the cylinder body 62 itself reciprocates, so that the cylinder body 62 of the rodless cylinder 61 cannot be fixed at a predetermined position.

[0010] Therefore, the cylinder body 62 of the rodless cylinder 61 requires some contrivance such as guiding the slider 63 to another guide mechanism, but the rodless cylinder 61 is still in an unstable state.

In addition, the connecting structure between the cylinder body 62 of the rodless cylinder 61 and the piston rod 66 is complicated and exaggerated, and the adjustment of the positional relationship at the time of assembling them is inconvenient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rodless cylinder device capable of performing an intermediate stop even when a cylinder body of a rodless cylinder is fixed at a predetermined position. It is in.

Another object of the present invention is to provide a rodless cylinder device which can achieve various advantages such as simplification of assembly work, downsizing as a whole, and reduction of the number of parts while achieving the above objects. It is in.

[0014]

According to the first aspect of the present invention, a piston is accommodated in a cylinder body of a rodless cylinder and a slider is arranged outside the cylinder body. The slider is configured to move in the direction in which the cylinder body extends along with the movement of the piston, and the piston and the slider can be selectively stopped at both stroke end positions of the cylinder body by fluid pressure acting on the piston. In the rodless cylinder device described above, the cylinder body is provided with a mounting portion for installation at a predetermined mounting position, and the piston or the slider is attached to the piston or the slider so as to stop the slider at a predetermined intermediate stop position between the both stroke ends. Stopper means for contacting the intermediate stop position is provided, and the stopper means is The provided drive means for moving aggressively into contact possible operating position in tons or slider.

By the above means, the rodless cylinder is used in a state where the rodless cylinder is fixed at a predetermined position using the mounting portion provided on the cylinder body of the rodless cylinder. The supply and discharge of fluid into and from the cylinder body of the rodless cylinder causes the piston in the cylinder body to move in the longitudinal direction of the cylinder body, and accordingly, the slider outside the cylinder body to move. Thereby, the piston and the slider are selectively stopped at both stroke end positions of the cylinder body. On the other hand, when the slider is stopped at a predetermined intermediate stop position between both stroke ends, the stopper means is driven by the driving means to be disposed at the operation position.
Then, the stopper means disposed at the operation position comes into contact with the piston or the slider of the rodless cylinder, and the slider is stopped at the intermediate stop position.

Therefore, according to the first aspect of the invention, the intermediate stop can be performed even if the cylinder body of the rodless cylinder is fixed at a predetermined position. In addition, the intermediate stop can be performed by automatic control using a driving unit.

According to a second aspect of the present invention, in the rodless cylinder device according to the first aspect, the stopper is disposed on the same axis as the moving axis of the piston or slider, and the stopper is moved by the driving means. Moved back and forth on the axis.

Since the stopper means is moved on the same axis as the movement axis of the piston or slider by the above means, it is possible to prevent the rodless cylinder from increasing in size in a direction intersecting the longitudinal direction. .

According to a third aspect of the present invention, in the rodless cylinder device according to the first or second aspect, when the driving means is not driven, the stopper means can freely move on the same axis as the movement axis of the piston or slider. In this case, when the stopper means is disposed at the operation position, the stopper means is pressed by a piston or a slider which comes into contact with the stopper means and retreats to a predetermined retreat position.

By the above means, the stopper means is automatically retracted by being pressed by the piston or the slider, without the stopper means being positively moved to the retracted position by the driving means. Therefore, according to the third aspect of the present invention, the control of the driving means can be simplified, and it is excellent from the viewpoint of energy saving.

According to a fourth aspect of the present invention, in the rodless cylinder device according to any one of the first to third aspects, the stopper means is constituted by a tip portion of a piston rod, and the driving means is constituted by the piston rod. Consisting of a fluid pressure cylinder having a connected piston inside,
The cylinder body of the fluid pressure cylinder was connected to the cylinder body of the rodless cylinder.

According to the above-mentioned means, since a normal hydraulic cylinder with a rod can be used as the driving means, parts of the existing hydraulic cylinder can be used, which contributes to cost reduction. Further, since the rodless cylinder is driven by a fluid pressure, all the driving sources can be set to the fluid pressure, and the peripheral drive circuit can be constructed only by designing the fluid circuit, which is advantageous in terms of design. Further, since the cylinder bodies of the rodless cylinder and the fluid pressure cylinder are connected to each other, there is no need to adjust the positional relationship between the rodless cylinder and the fluid pressure cylinder when the cylinder body is installed at a predetermined position.

According to a fifth aspect of the present invention, in the rodless cylinder device according to the fourth aspect, the effective pressure receiving area of the piston on the fluid pressure cylinder side is larger than the effective pressure receiving area of the piston on the rodless cylinder side. did.

According to the above means, when fluids of the same pressure are used for the rodless cylinder and the intermediate pressure hydraulic cylinder, respectively, the thrust applied to the piston on the hydraulic cylinder side is changed to the thrust applied to the piston on the rodless cylinder side. Therefore, the slider can be reliably stopped at the intermediate stop position.

According to a sixth aspect of the present invention, in the rodless cylinder device according to the fourth or fifth aspect, the cylinder body of the rodless cylinder includes a cylinder tube and covers for closing both ends thereof, The cylinder body of the pressure cylinder is provided with a cover at least on the piston rod projecting side, and one cover of the rodless cylinder is also used as a cover on the piston rod projecting side of the fluid pressure cylinder, and when the tip of the piston rod is stopped intermediately, The rodless cylinder is configured to be in contact with the piston.

By the above means, the piston rod of the intermediate pressure stopping hydraulic cylinder is brought into contact with the piston of the rodless cylinder, and the two covers are shared, so that the number of parts can be reduced. The length of the entire rodless cylinder device can be shortened. Further, the relative positional relationship between the rodless cylinder and the fluid pressure cylinder can be made firm.

According to a seventh aspect of the present invention, in the rodless cylinder device according to any one of the first to sixth aspects, the cylinder body of the rodless cylinder includes a cylinder tube and covers for closing both ends thereof. The mounting portion is provided on each cover.

By the above-mentioned means, the mounting portion is formed at least at a distance equal to or longer than the length of the cylinder tube of the rodless cylinder, and the stability when the rodless cylinder device is fixed via the mounting portion. Increase.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment]
FIGS. 1 to 3 show a rodless cylinder device according to an embodiment of the present invention.
A description will be given based on FIG.

First, the basic structure of the rodless cylinder 1 constituting the rodless cylinder in this embodiment will be described. The rodless cylinder 1 is provided with a cylindrical and long cylinder tube 2. Both ends in the longitudinal direction of the cylinder tube 2 are the first cover 3 and the second
It is closed by the cover 4. The rodless cylinder 1 is formed by the cylinder tube 2 and the covers 3 and 4.
Is constituted.

The exposed portions of the two covers 3 and 4 are formed in a rectangular plate shape. As shown in FIG. 3B, the two covers 3 and 4 are provided with mounting portions on the same side surfaces (lower surfaces in this case). A pair of bolt holes 3a as mounting holes constituting
4a are formed. The cylinder body is fixed at a predetermined position by screwing bolts (not shown) into the bolt holes 3a and 4a, respectively. Since these bolt holes 3a, 4a are both formed on the flat surfaces of both covers 3, 4, the rodless cylinder 1 can be fixed in a stable state.

A piston 5 is accommodated in the cylinder tube 2 so as to be movable in the longitudinal direction of the tube 2. The internal space of the cylinder body is partitioned by the piston 5 into two chambers, a first pressure chamber 6 and a second pressure chamber 7.

The first cover 3 has a first port 8 communicating with the first pressure chamber 6, and the second cover 4 has a second port 9 communicating with the second pressure chamber 7. The first port 8 and the second port 9 are opened on the same side surface (here, the lower surface) of both covers 3 and 4. The first port 8 and the second port 9 are respectively connected to piping (not shown),
Fluid is selectively supplied by an external switching valve.

When the fluid is supplied from the first port 8, the fluid pressure in the first pressure chamber 6 increases, and the piston 5
Is a stroke end that contacts the second cover 4 (hereinafter, referred to as a stroke end).
(Referred to as “first stop position”). On the other hand, when fluid is supplied from the second port 9, the fluid pressure in the second pressure chamber 7 increases, and the piston 5 moves to a stroke end (hereinafter, referred to as a “second stop position”) in contact with the first cover 3. Stopped.

The slider 10 is a cylindrical body having a rectangular parallelepiped outer shape and having a through-hole having a circular cross-section penetrating therein in the longitudinal direction. The cylinder tube 2 is inserted through the through-hole. Thereby, the cylinder tube 2
A slider 10 is mounted outside so as to be movable in the longitudinal direction of the tube 2. Bolt holes 1 as mounting portions are provided on the upper surface of the slider 10 so that various members can be mounted.
0a are formed in plurality.

A plurality of permanent magnets 11 and yokes 12 are supported on the piston 5 alternately stacked in the longitudinal direction of the cylinder tube 2, and a plurality of permanent magnets 13 and yokes 14 are also mounted on the slider 10. Are supported alternately in the longitudinal direction. The thickness and number of the permanent magnet 11 and the yoke 12 on the piston 5 side are as follows:
The permanent magnets 13 and the yokes 14 on the slider 10 are identical to those of the yoke 14, and are provided in a positional relationship corresponding to each other. The permanent magnet 11 on the piston 5 side and the corresponding permanent magnet 13 on the slider 11 side are set to have opposite polarities. As a result, a magnetic attractive force acts between the piston 5 and the slider 10, and the slider 10 moves following the movement of the piston 5.

In contrast to the basic configuration of the rodless cylinder 1 described above, in this embodiment, an intermediate stop cylinder 21 composed of a fluid pressure cylinder as a driving means is arranged on the same axis as the longitudinal direction of the cylinder body and in series. It is attached to be connected to. Thus, the intermediate stop cylinder 21 will be described.

The intermediate stop cylinder 21 shares the second cover 4 of the rodless cylinder 1. That is, the intermediate stop cylinder 21 uses the second cover 4 as a rod cover. One end of the cylinder tube 22 is connected to the second cover 4 so as to close one end of the tube 22. The other end of the cylinder tube 22 has the same tube 2
A third cover 23 is connected so as to close the other end of 2. These cylinder tube 22 and both covers 4, 2
The cylinder body of the intermediate stop cylinder 21 is constituted by 3.

A piston 24 is provided in the cylinder tube 22.
Are movably accommodated in the longitudinal direction of the tube 22. The length of the cylinder tubes 2 and 22 is set so that the effective stroke of the piston 24 is shorter than the effective stroke of the piston 5 and the slider 10. The internal space of the cylinder body of the intermediate stop cylinder 21 is divided by the piston 24 into two chambers, a third pressure chamber 25 and a fourth chamber 26. Note that a permanent magnet 27 for position detection is mounted on the piston 24.

The third cover 23 has a third port 28 communicating with the third pressure chamber 25, and the second cover 4 has a fourth port 28.
A fourth port 29 communicating with the chamber 26 is formed. The fourth port 29 is provided in parallel with the second port 9. The third port 28 and the fourth port 29 are respectively connected to piping (not shown), and fluid is supplied to and discharged from the third port 28 by an external switching valve. The pipe connected to the fourth port 29 is open outside, and the fourth port 29 functions as a breathing port.

As is apparent from FIG. 1, the inner peripheral diameter of the cylinder tube 22 of the intermediate stop cylinder 21 is formed larger than the inner peripheral diameter of the cylinder tube 2 of the rodless cylinder 1. That is, the effective pressure receiving area of the piston 24 is formed larger than the effective pressure receiving area of the piston 5. Therefore, when the same fluid pressure acts on both pistons 5, 24, the piston 24 on the intermediate stop cylinder 21 side
Thrust exceeds the thrust of the piston 5 on the rodless cylinder 1 side.

Normally, the piston 24 comes into contact with the third cover 23 at a stroke end (hereinafter referred to as a "retreat position").
Are located in When the fluid is supplied from the third port 28, the fluid pressure in the third pressure chamber 25 increases,
The piston 24 is stopped at a stroke end (hereinafter, referred to as an “operating position”) in contact with the second cover 4. on the other hand,
When the supply of the fluid from the third port 28 is stopped, the thrust based on the fluid pressure acting directly on the piston 24 is lost,
The piston 24 becomes freely movable.

The piston 24 is integrally provided with a piston rod 31 as stopper means. The piston rod 31 extends along the longitudinal direction of the two cylinder tubes 2 and 22 and extends toward the piston 5 of the rodless cylinder 1, and is provided so as to penetrate the second cover 4.

The length of the piston rod 31 is
In a state in which the piston 4 on the rodless cylinder 1 side is located in the first stop position in a state in which the piston 4 is located in the retracted position, the tip of the piston rod 31 is located in the second cover 4 and the rodless cylinder 1 The length is set so as not to interfere with the piston 5 on the side.

Although not described individually, a seal member such as a seal ring is appropriately provided at a place where it is necessary to prevent fluid leakage or partition a chamber in each part.
In each part, a sliding resistance reducing member such as a wear ring is appropriately provided at a position where the sliding resistance of the sliding portion needs to be reduced. Further, a cushioning member such as a cushion rubber is provided at a place where it is necessary to reduce the impact at the time of contact of the contact portion in each part.

Next, the operation of the rodless cylinder device configured as described above will be described. The rodless cylinder device has bolt holes 3 formed in a pair of covers 3 and 4 provided at positions separated from each other.
Bolts (not shown) are screwed into a and 4a to be fixed at predetermined positions.

Therefore, when the piston 5 and the slider 10 are arranged at the first stop position as shown in FIGS. 1 to 3, fluid is supplied from the second port 9 and fluid is discharged from the first port 8. Then, the fluid pressure in the second pressure chamber 7 increases, and the piston 5 and the slider 10 are switched to the second stop position shown in FIG.

Also, the piston 5 and the slider 10 are shown in FIG.
When the fluid is supplied from the first port 8 and discharged from the second port 9 in the state where the fluid is supplied to the second stop position shown in (a), the fluid pressure in the first pressure chamber 6 increases. , Piston 5 and slider 10 are shown in FIGS.
Is switched to the first stop position shown in FIG.

The above-described switching arrangement between the first stop position and the second stop position is an operation which is also seen in a general rodless cylinder. When switching between the first stop position and the second stop position, the piston 24 of the intermediate stop cylinder 21 is located at the retracted position, and the tip of the piston rod 31 is moved to the piston 5 of the rodless cylinder 1. There is no interference when moving.

Here, when fluid is supplied from the third port 28 of the cylinder 21 for intermediate stop to perform intermediate stop, the fluid pressure in the third pressure chamber 25 increases, and the piston 24 is stopped at the operation position. . In addition, the fourth as a breathing port
From the port 29, the fluid corresponding to the reduced volume of the fourth chamber 26 is discharged to the outside. In this operation position, the piston rod 31 is in a state of protruding into the cylinder tube 2 of the rodless cylinder 1. On the other hand, on the rodless cylinder 1 side, the fluid pressure is supplied from the first port 8 and the fluid is discharged from the second port 9, whereby the piston 5 is moved to the piston rod 31 side.

Then, as shown in FIG. 4B, the tip of the piston rod 31 comes into contact with the side surface of the piston 5.
As described above, the inner diameter of the cylinder tube 22 of the intermediate stop cylinder 21 is formed larger than the inner diameter of the cylinder tube 2 of the rodless cylinder 1. That is,
The effective pressure receiving area of the piston 24 is formed larger than the effective pressure receiving area of the piston 5. Therefore, when the same fluid pressure acts on both the pistons 5 and 24, the thrust of the piston 24 on the intermediate stop cylinder 21 side exceeds the thrust of the piston 5 on the rodless cylinder 1 side. As a result, while the piston 24 is held at the operating position, the piston 5 is restricted from further movement at a position where the piston 5 comes into contact with the tip of the piston rod 31, and at the intermediate stop position shown in FIG. The slider 10 is stopped.

In order to release the intermediate stop state, the supply of the fluid from the third port 28 may be simply stopped to set the state of the discharge of the fluid. At this time, the third port 28 and the fourth port 29 are opened to the atmosphere, and the piston 24 is freely movable. Therefore, for example, if the supply of fluid from the first port 8 is continued on the rodless cylinder 1 side as described above, the piston 5 pushes the piston rod 31 to move the piston 5 and the slider 10 to the first stop position. Will be returned. Of course, at this time, the piston 24 is automatically returned to the retracted position.

Therefore, according to the first embodiment, the following effects can be obtained. (1) Although the intermediate stop function is provided in the rodless cylinder 1 constituting the rodless cylinder device, the cylinder body of the rodless cylinder 1 can be fixed at a predetermined position by the bolt holes 3a and 4a. .

(2) The rodless cylinder 1 is fixed by bolt holes 3a, 4a which are separated by more than the length of the cylinder tube 1.
Therefore, the rodless cylinder device can be fixed in a more stable state.

(3) Since each of the bolt holes 3a, 4a is formed on a flat surface of both covers 3, 4, the rodless cylinder 1 can be fixed in a more stable state.

(4) Since the intermediate stop cylinder 21 is arranged in series with the rodless cylinder 1 to realize the intermediate stop, the space in the direction intersecting the longitudinal direction of the rodless cylinder 1 can be increased as much as possible. Can be suppressed.

(5) Since the piston rod 31 of the intermediate stop cylinder 21 is used as stopper means for intermediate stop, the length of the piston rod 31 is changed according to the intermediate stop position (corresponding to that). By using the cylinder tube 22 (which also requires the length), a desired intermediate stop position can be easily realized.

(6) The selection of whether or not to perform the intermediate stop can be automatically performed only by the presence or absence of the supply of the fluid pressure to the cylinder 21 for the intermediate stop, so that the intermediate stop can be automatically performed. In addition, if the supply of the fluid to the intermediate stop cylinder 21 is stopped, the piston 24 is automatically retracted to the retracted position by the movement of the piston 5, which is excellent in terms of simplification of control and energy saving.

(7) Since the intermediate stop cylinder 21 for realizing the intermediate stop is driven by fluid pressure similarly to the rodless cylinder 1, there is an advantage that the drive source can be shared and the system design is advantageous. is there.

(8) Since the second cover 4 of the rodless cylinder 1 is also used and shared as the rod cover of the intermediate stop cylinder 21, the number of parts can be reduced, and the number of parts can be reduced as compared with the case where each cover is provided. To reduce the length in the longitudinal direction.

(9) The rodless cylinder 1 employs a magnet type rodless cylinder with extremely low fluid leakage, and a pipe can be connected to the fourth port 29 used as a breathing port so that the fluid is immediately exposed to the external atmosphere. Since it is not exposed to the inside, it is ideal for use in clean rooms.

(10) Each port 8, 9,
Since all 28 and 29 are formed on the fixed side, the pipe itself does not move in accordance with the movement of the slider 10,
Inconveniences such as disconnection, congestion, and breakage of a pipe can be solved. Further, for the same reason, an unreasonable load that hinders the smooth operation of the slider 10 is not applied.

[Second Embodiment] A rodless cylinder device according to a second embodiment will be described below with reference to FIG. Note that, in the second embodiment, the basic configuration of the rodless cylinder 1 in the first embodiment is the same, and a description thereof will be omitted.

A cylinder main body 42 of an intermediate stop cylinder 41 as a fluid pressure cylinder constituting driving means is fixed to the slider 10. The cylinder body 42 is provided so as to extend in parallel with the cylinder tube 2.

A piston (not shown) is accommodated in the cylinder body 42 so as to be movable in the longitudinal direction of the cylinder body 2. A piston rod 43 as stopper means protruding from the cylinder body 2 to one side is integrally mounted on the piston. Note that, as in the first embodiment, the effective pressure receiving area of the piston in the cylinder body 2 is larger than the effective pressure receiving area of the piston 5 of the rodless cylinder 1.

Ports 44 and 45 are formed at both ends of the cylinder body 2, and piping is connected to both ports 44 and 45, respectively. Fluid is supplied to and discharged from a pipe connected to the port 44 on the head side, and the port 45 on the rod side.
Is connected to the atmosphere.

A stopper 46 facing the piston rod 43 is fixed to the first cover 3. The stopper piece 46 may be formed integrally with the first cover 3. A stopper bolt 47 that is in contact with the tip of the piston rod 43 is mounted on the stopper piece 46. The position of the stopper bolt 47 can be adjusted in the longitudinal direction with respect to the stopper piece 46.

When the piston rod 43 is retracted toward the cylinder body 42, the slider 10 is switched between the first stop position and the second stop position. On the other hand, when the intermediate stop is performed, if the piston rod 43 is supplied with the fluid pressure from the port 44 to assume the operation position in which the piston rod 43 projects from the cylinder body 42, the piston rod 43 comes into contact with the stopper bolt 47 at the tip. The slider 10 is stopped intermediately.

In the rodless cylinder device configured as described above, a standard type can be used as the rodless cylinder 1 and the intermediate stop cylinder 4 can be used.
A new type 1 can be used, and a new effect that cost reduction can be achieved.
Further, there is an effect that the length can be kept within the range of the length of the rodless cylinder 1 itself.

[Third Embodiment] Hereinafter, a rodless cylinder device according to a third embodiment will be described with reference to FIG. In the third embodiment, the stopper piece 46 in the second embodiment is fixed to the slider 10 side, and the intermediate stop cylinder 4 in the second embodiment is fixed.
1 was placed on the first cover 3 side.

Therefore, according to the third embodiment, since the intermediate stop cylinder 41 is installed on the fixed side, the piping connected to each port 44, 45 is
It does not move in accordance with the movement of 0, and can solve problems such as disconnection, congestion, and breakage of the pipe. Further, for the same reason, an unreasonable load that hinders the smooth operation of the slider 10 is not applied.

[Fourth Embodiment] A rodless cylinder device according to a fourth embodiment will be described below with reference to FIG. Note that, in the fourth embodiment, the basic configuration of the rodless cylinder 1 in the first embodiment is the same, and a description thereof will be omitted.

In the fourth embodiment, a rotating shaft 51 extending parallel to the cylinder tube 2 is rotatably supported by a pair of ball bearings 52. The ball bearing 5
The configuration of the second installation site is not shown. An arm 53 is fixed between the two ball bearings 52 of the rotating shaft 51,
At the tip of the arm 53, a stopper 54 as a stopper means is mounted. At the end of the rotating shaft 51, a fluid pressure driven rotary actuator 55 as a driving means is installed.

The rotary actuator 55 rotates the rotation shaft 51 so that the stopper 54 can rotate between an operation position where the stopper 54 reaches the movement area of the slider 10 and a retreat position retracted therefrom.

When the stopper 54 is located at the retracted position, the slider 10 is switched between the first stop position and the second stop position. On the other hand, when the intermediate stop is performed, the stopper 54 is switched to the operating position by driving the rotary actuator 55, so that the stopper 54
The slider 10 is brought into the intermediate stop position when the slider 10 comes into contact with the intermediate position 0.

The intermediate stop position differs depending on whether the slider 10 is on the right side or the left side of the stopper 54 in a state where the stopper 54 is located at the operation position. That is,
If the intermediate stop is performed in a state where the slider 10 is disposed on the right side of the stopper 54, the slider 10 stops at a position where the left side surface of the slider 10 is in contact with the right side surface of the stopper 54. On the other hand, when the intermediate stop is performed in a state where the slider 10 is disposed on the left side of the stopper 54, the slider 10 stops at a position where the right side surface of the slider 10 is in contact with the left side surface of the stopper 54.

Therefore, according to the fourth embodiment, two different positions can be set as intermediate stop positions by a single stopper 54, and a total of four stop positions of the slider 10 can be realized. A new effect is obtained. Further, since the stopper 54 can be switched between the retracted position and the operation position by rotating the stopper 54 via the arm 53, the stopper 54 is installed in comparison with a structure in which the stopper 54 is linearly reciprocated in a direction orthogonal to the cylinder tube 2. A new effect that the space can be minimized is obtained.

[Other Embodiments] In addition to the above embodiments, there are other embodiments as follows. As the rodless cylinder 1, a slit type rodless cylinder may be used instead of a magnet type rodless cylinder. The slit type rodless cylinder is
As is well known, the piston is housed in the internal space of the cylinder tube so as to be movable in the longitudinal direction of the cylinder tube,
A slit is formed in the longitudinal direction of the cylinder tube, and a slider disposed outside the cylinder tube is connected to the piston via the slit so as to be integrally movable.
This slit is provided with a seal belt to reduce the amount of fluid leaking from the slit, but the amount of fluid leakage is larger than that of the magnet type rodless cylinder, and it is assumed that the slit is used in a clean room or the like. In this case, it is preferable to select a magnet type rodless cylinder.

The cover holes 3a and 4a are formed in the covers 3 and 4 to form the mounting holes as the mounting portions, but these are formed as bolt holes (mounting holes) penetrating the covers 3 and 4. Is also good. Of course, the bolt hole may be a screw hole or an insertion hole in which no screw groove is formed.

Although the mounting portions such as the bolt holes 3a and 4a are formed only on the two covers 3 and 4, it is also possible to form them on the third cover 23 on the side of the intermediate stop cylinder 21. In this case, it is preferable that the third cover 23 is also formed in a square plate shape in accordance with the two covers 3 and 4.

The both stroke end positions of the slider 10, that is, the first stop position and the second stop position, may be appropriately adjusted by adjusting members such as stopper bolts. In each of the first to third embodiments, an electric actuator may be used instead of the intermediate stop cylinders 21 and 41.

In each of the first to third embodiments,
The ports 29 and 45 functioning as the breathing ports of the intermediate stop cylinders 21 and 41 can positively supply and discharge the fluid, and the movement of the piston rods 31 and 43 to the retracted position is also performed by the positive drive. It may be. In this case, there is no particular change in the structure of the intermediate stop cylinders 21 and 41, and the change can be easily made on the external piping.

In the first embodiment, the intermediate stop cylinder 21 may be provided on the first cover 3 side to realize intermediate stop at two different positions. However, in this case, the length in the longitudinal direction becomes very long.

The rodless cylinder 1, the intermediate stop cylinders 21 and 41, etc.
At least the inner peripheral surface 2 and the pistons 5 and 24 contained therein may be formed as a non-circular shaped cylinder having a flat shape or the like. In this case, the rotation of the pistons 5 and 24 can be stopped.

The outer peripheral surface of the rodless cylinder 1 and the inner peripheral surface of the slider 10 fitted on the outer periphery of the rodless cylinder 1 may be formed in a non-circular shape such as a flat shape. In this case, the rotation of the slider 10 itself can be prevented.

A cushioning member such as a cushion rubber may be provided at the distal ends of the piston rods 31 and 43 constituting the stopper means, the piston 5 and the stopper piece 46 which are in contact with the piston rods 31 and 43, etc. for cushioning the impact.

In each of the first to third embodiments,
It is not always necessary to make the effective pressure receiving area of the intermediate stop piston 24 or the like larger than the effective pressure receiving area of the piston 5 of the rodless cylinder 1, and the supplied fluid pressure is higher than that of the rodless cylinder 1 side. The thrust may eventually be increased by increasing the 41 side. In this case, the intermediate stop cylinders 21 and 41 can be made compact.

The characteristic means other than the claims ascertained from the above embodiments and their effects are listed below. (1) In claim 6, supply and discharge ports for supplying and discharging fluid pressure to chambers on both sides of a piston of the rodless cylinder are formed in covers on both sides of the rodless cylinder, respectively. Formed a breathing port for opening the chamber on the rod mounting side of the hydraulic cylinder to the atmosphere. According to this means, each port can be formed on the cover, and particularly, the ports can be aggregated for the cover shared by each other.

(2) In the above means (1), pipes can be connected to the supply / discharge port and the breathing port, respectively. According to this means, it is unsuitable for use in a clean room or the like, particularly when the configuration is such that the breathing port is simply communicated with the outside.However, since the fluid can enter and exit the breathing port outside the clean room, the clean room It is most suitable for use in etc.

(3) In any one of claims 1 to 7, the mounting portion is provided on a flat surface formed on the rodless cylinder, and the mounting portion is formed with a mounting hole or a mounting hole for mounting a mounting member such as a bolt. It was a mounting hole. According to this means, there is an advantage that the configuration of the mounting portion is simplified,
Since the flat surface is used, the rodless cylinder device can be fixed in an extremely stable state.

(4) In any one of claims 1 to 7, the rodless cylinder can be integrally moved by applying a magnetic attraction force by a magnet between a piston inside the cylinder body and a slider outside the cylinder body. And a magnet type rodless cylinder. According to this means, the amount of fluid leakage is remarkably reduced as compared with the slit type rodless cylinder, and it is particularly suitable for use in a clean room.

(5) The cylinder body of the rodless cylinder is provided with a mounting portion for installation at a predetermined mounting position, and a hydraulic pressure is applied to the slider so as to stop the slider at a predetermined intermediate stop position between both stroke ends. A cylinder is provided, and the fluid pressure cylinder is provided with a piston rod which is advanced and retracted in a direction parallel to a direction in which the cylinder body of the rodless cylinder extends, and the piston rod is provided at an end of the cylinder body of the rodless cylinder. A stopper piece with which the tip of the rod abuts when the rod projects is provided.
This means corresponds to the second embodiment. According to this means, the standard type can be used as the rodless cylinder and the standard type can also be used as the fluid pressure cylinder for the intermediate stop, so that the cost can be reduced.

(6) The cylinder body of the rodless cylinder is provided with a mounting portion for installation at a predetermined mounting position, and a stopper piece is provided on the slider to stop the slider at a predetermined intermediate stop position between both stroke ends. And a fluid pressure cylinder provided with a piston rod that is advanced and retracted toward the stopper piece at or near the end of the cylinder body of the rodless cylinder. This means corresponds to the third embodiment. According to this means, the standard type can be used as the rodless cylinder and the standard type can also be used as the fluid pressure cylinder for the intermediate stop, so that the cost can be reduced. Further, since the fluid pressure cylinder for the intermediate stop is installed on the fixed side, there is no possibility that the pipe moves following the slider. (7) The cylinder body of the rodless cylinder is provided with a mounting portion for installation at a predetermined mounting position, and the slider is moved in parallel with the moving direction of the slider so as to stop the slider at a predetermined intermediate stop position between both stroke ends. A rotary actuator for providing a stopper on an extended rotating shaft and rotating the rotating shaft about its axis so that the stopper can be moved between an operation position where the slider enters the movement area of the slider and a retracted position where it is retracted therefrom. Was provided. This means corresponds to the fourth embodiment. According to this means, two different positions can be set as intermediate stop positions by a single stopper, and a total of four slider stop positions can be realized. Further, since the stopper can be switched between the retracted position and the operation position by rotating the stopper, the installation space can be reduced as much as possible as compared with a structure in which the stopper is linearly reciprocated in a direction orthogonal to the cylinder body. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rodless cylinder according to a first embodiment.

FIG. 2 is a perspective view of a rodless cylinder.

FIG. 3A is a plan view of a rodless cylinder, and FIG.
Is a bottom view of the rodless cylinder.

FIG. 4A is a bottom view of a rodless cylinder showing a state where the slider has reached one stroke end position (second stop position), and FIG. 4B is a rod showing a state where the slider has stopped at an intermediate stop position. The bottom view of a less cylinder.

FIG. 5 is a bottom view of a rodless cylinder according to a second embodiment.

FIG. 6 is a bottom view of a rodless cylinder according to a third embodiment.

FIG. 7 is a bottom view of a rodless cylinder according to a fourth embodiment.

8A is a plan view showing a state in which a slider is disposed at a first position, according to a conventional rodless cylinder, FIG.
(B) is a plan view showing a state where the slider is arranged at a second position, and (c) is a plan view showing a state where the slider is arranged at a third position, that is, an apparent intermediate stop position.

[Explanation of symbols]

1 ... Rodless cylinder, 2,3,4 ... Cylinder tube constituting the cylinder body of rodless cylinder, 1st
Cover, second cover, 3a, 4a ... bolt hole as mounting part, 5 ... piston, 10 ... slider, 21 ... intermediate stop cylinder as fluid pressure cylinder constituting drive means, 2, 22, 23 ... intermediate stop 2nd cover, cylinder tube, 3rd cover which constitutes the cylinder body of the cylinder for use, 24 ... piston, 31 ... piston rod as stopper means, 41 ... intermediate stop cylinder as fluid pressure cylinder which constitutes drive means, 42 ... Cylinder body, 4
3 ... Piston rod as stopper means, 54 ... Stopper as stopper means, 55 ... Rotary actuator as drive means.

Claims (7)

[Claims] A piston is accommodated in a cylinder body of a rodless cylinder and a slider is provided outside the cylinder body, and the slider is moved in a direction in which the cylinder body extends with movement of the piston. In a rodless cylinder device in which a piston and a slider can be selectively stopped at both stroke end positions of a cylinder body by a fluid pressure acting on a piston, the cylinder body has a mounting portion for mounting at a predetermined mounting position. In order to stop the slider at a predetermined intermediate stop position between the two stroke ends, stopper means for contacting the piston or slider at the intermediate stop position is provided, and the stopper means can contact the piston or slider. Rod with driving means for positively moving to a different operating position Sushirinda apparatus. 2. The rodless cylinder device according to claim 1, wherein said stopper means is arranged on the same axis as the movement axis of said piston or slider, and said driving means moves said stopper means back and forth on said movement axis. . 3. When the driving means is not driven, the stopper means can be freely moved on the same axis as the movement axis of the piston or slider. In this case, when the stopper means is arranged at the operating position, The rodless cylinder device according to claim 1 or 2, wherein the piston or slider is pressed by a piston or a slider that comes into contact with the stopper and retracted to a predetermined retracted position. 4. The stopper means is constituted by a distal end portion of a piston rod, and the driving means is constituted by a fluid pressure cylinder having a piston connected to the piston rod therein, and a cylinder body of the fluid pressure cylinder is constituted by the rod. 4. The rodless cylinder device according to claim 1, wherein the rodless cylinder device is connected to a cylinder body of the cylinder. 5. The rodless cylinder device according to claim 4, wherein an effective pressure receiving area of the piston on the fluid pressure cylinder side is larger than an effective pressure receiving area of the piston on the rodless cylinder side. 6. The cylinder body of the rodless cylinder includes a cylinder tube and a cover that closes both ends of the cylinder tube. The cylinder body of the fluid pressure cylinder includes a cover at least on a piston rod protruding side. 6. The piston according to claim 4, wherein one of the covers is also used as a cover on the piston rod protruding side of the fluid pressure cylinder, and the tip of the piston rod is brought into contact with the piston of the rodless cylinder at the time of intermediate stop. The rodless cylinder device as described. 7. The rodless cylinder according to claim 1, wherein the cylinder body includes a cylinder tube and covers for closing both ends of the cylinder tube, and the mounting portions are provided on each of the covers. The rodless cylinder device as described.