JPH09233U - Fluid piping device - Google Patents

Abstract

(57) [Summary] PROBLEM TO BE SOLVED: To achieve downsizing while securing a pipe length.
Provided is a fluid piping device. SOLUTION: Telescopic pipe P₁Is three pipes P_1a, P
_1b, P_1cIt is configured by connecting
P_TwoIs three pipes P_2a, P_2b, P_2cConnect in series
It is configured. Each pipe P_1a, P_1b, P_1c, P_2a, P
_2b, P_2cAt the end of each of the first connection block B₁, No.
2 connection block B_Two, 3rd connection block B _Three, 4th connection
Block B_FourIs provided. And each of these connections
Block B ₁, B_Two, B_Three, B_Four, Guide rod 35 and
And nuts 39A, 39B, 47A, 47B
Pipe P_1a, P_1b, P_1c, P_2a, P_2b, P_2cExpansion direction of
The retaining mechanism is configured.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a fluid piping device for supplying a driving fluid to a fluid type actuator connected to a cylinder.

[0002]

[Prior art]

 As a conventional device of this type interposed between the fluid type actuator and the fluid supply source, a flexible tube made of nylon or urethane is commonly used. This type of tube is flexible and can supply a driving fluid to a moving actuator.

However, when the tube bends due to the movement of the actuator, the tube may be caught by other surrounding members and damaged. Also, if a large space for tube storage is secured to avoid getting caught, the entire system will become large.

As another conventional device disclosed in Japanese Utility Model Laid-Open No. 1-155149, a one-stage expansion / contraction type piping device in which a movable pipe is slidably accommodated in a casing for supplying a driving fluid is proposed. The outer end of the movable pipe is connected to a table fixed to the piston rod of the cylinder, and is connected to the actuator via a fluid passage in the table. When the piston rod is moved, the movable pipe slides in the storage casing following the movement. According to this method, the entire pipe consisting of the storage casing and the movable pipe expands and contracts according to the movement position of the actuator, the storage space is smaller than that of the tube type, and the movable pipe does not get caught on other members. .

[0005]

[Problems to be solved by the device]

 However, this conventional telescopic piping device requires a housing casing having the same length as the movable pipe. It is necessary to secure the space for the storage casing in the system with the increase in the size of this storage part, and it is difficult to achieve the miniaturization of the system sufficiently. In particular, increasing the length of the storage casing is a problem when applied to rodless cylinders.

When the rodless cylinder and the rod-equipped cylinder are compared, if the stroke length is the same, the rodless cylinder becomes smaller by the protruding / retracting length of the piston rod. This is due to the structure in which the table for mounting the fluid actuator moves along the cylinder peripheral surface, and this is an advantage of the rodless cylinder. Further, when the conventional telescopic piping device is incorporated in the rodless cylinder, the storage casing must be installed outside the end of the cylinder peripheral surface of the rodless cylinder. Due to this unavoidable installation method, the shorter the length of the storage casing is better, but the conventional storage casing has the same length as the rodless type cylinder itself, and it is possible to realize a compact system. Can not.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a fluid piping device capable of achieving miniaturization while ensuring the piping length.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, in the device according to claim 1, at least three pipes are slidably connected in series and a retaining mechanism for preventing connection disconnection between the plurality of pipes is provided. A fluid piping device equipped with a pipe, which has a pair of pipes connected in series, in which a connecting block is fixed to the connecting end of one pipe, and the other pipe can be slidably guided in the connecting block. Inserted.

In addition, in the device according to claim 2, in addition to the device according to claim 1, a connection block fixed to the one pipe is provided with a seal ring that abuts on an outer peripheral surface of the other pipe. .

(Operation) By the above means, in the invention according to claim 1, at least three pipes are connected in series in a slidable manner, and a retaining mechanism for preventing disconnection between the plurality of pipes is provided. Since it is provided, it is possible to reduce the size while securing the pipe length. However, since a connection block is fixed to the connection end of one of the pair of pipes connected in series, and the other pipe is inserted in the connection block so that it can slide and guide, The other pipe expands and contracts while being slidably guided by the connection block with respect to the one pipe, and the respective pipes expand and contract smoothly.

Further, in the invention according to claim 2, since the other pipe expands and contracts while being slidably guided by the connection block with respect to the one pipe, one edge of the seal ring provided in the connection block is prevented. Therefore, the sealability of the seal ring can be maintained for a long period of time.

[0012]

[Embodiment of the invention]

 An embodiment in which the present invention is embodied in an article conveying device will be described below with reference to FIGS.

As shown in FIG. 5, reference numeral 1 denotes a frame including a base 1a and a pair of legs 1b, and a rodless cylinder C is erected and supported between both legs 1b. As shown in FIG. 8, end blocks 4 and 5 are fixed to both ends of a cylinder tube 2 and a guide pipe 3 which form a rodless cylinder C, and the cylinder tube 2 and the guide pipe 3 are connected to the end block 4. , 5 are supported in parallel by both legs 1b. A piston 6 is slidably accommodated in the cylinder tube 2, and the piston 6 divides the interior of the cylinder tube 2 into a pair of pressure chambers R ₁ and R ₂ . Fluid supply passages 7 and 8 are provided through the end blocks 4 and 5, respectively, and the passages 7 and 8 communicate with the pressure chambers R ₁ and R ₂ , respectively. Hoses 45 and 46 for supplying a driving fluid are connected to the pressure chambers R ₁ and R ₂ , respectively.

The piston 6 includes a base shaft 9, a plurality of permanent magnets 10 fitted to the base shaft 9, a plurality of annular yokes 11 supported in parallel on both sides of each permanent magnet 10, and screwed to both ends of the base shaft 9. The permanent magnet 10 and the yoke 11 are fastened and fixed to the base shaft 9 by fastening the fastening member 12.

A table 13 is slidably fitted and supported on the cylinder tube 2 and the guide pipe 3. A pair of cylinder tube bearings 15 and a pair of guide pipe bearings 16 are built in a non-magnetic cover 14 that constitutes the table 13, and a permanent magnet 17 and a yoke 18 are provided between the pair of cylinder tube bearings 15. And are juxtaposed. The permanent magnet 17 has an attraction relationship with the permanent magnet 10 on the piston 6, and the table 13 follows the movement of the piston 6 due to the fluid supply and discharge of the pressure chambers R ₁ and R ₂ .

Fluid is switched and supplied to the pressure chambers R ₁ and R ₂ via hoses 45 and 46, and the table 13 is reciprocated along the guide pipe 3 based on the fluid switching control. The table 13 is driven leftward by the fluid supply to the pressure chamber R ₂ on the right side, and stops at the position shown in FIGS. 5 and 6. The table 13 is driven to the right by the fluid supply to the pressure chamber R ₁ on the left side, and stops at the position shown in FIG. 9. Position detection sensors (not shown) are respectively arranged at the rightmost end position and the leftmost end position of the cylinder tube 2, and the position detection signal from the position detection sensor is transmitted via the relay boards 19 and 20 and the flat cable 21. It is output to the outside.

As shown in FIG. 5, an elevating body 22 is mounted on the front surface of the table 13 so as to be slidable in the vertical direction, and a parallel opening / closing mechanism is provided at the lower end of the elevating body 22 for gripping and releasing a work. A chuck 23 is provided. The lifting body 22 and the parallel opening / closing chuck 23 constitute a fluid type actuator.

A vertical cylinder 24 is arranged on the table 13, and a lifting body 22 is connected to a piston rod (not shown) of the cylinder. Position detection sensors 25 and 26 are provided at the uppermost end position and the lowermost end position of the vertical cylinder 24, and the position detection signals from the position detection sensors 25 and 26 are relay substrates 19 and 20 and the flat cable. It is output to the outside via the bull 21.

As shown in FIG. 5 and FIG. 9, fluid piping devices 27 and 28 are arranged in parallel in the upper and lower portions of the vertical cylinder 24 in two stages. As shown in FIG. 7, a pair of pressure chambers (not shown) in which the lower fluid piping device 27 is partitioned by pistons (not shown) in the vertical cylinder 24 via connection paths (not shown) inside the table 13 It is connected to the. Fluid is switched and supplied to the pair of upper and lower pressure chambers via the fluid piping device 27, and the lifting body 22 is reciprocated in the vertical direction based on the fluid switching control. The lifting body 22 is driven upward by the fluid supply to the lower pressure chamber, and the upper end of the lifting body 22 contacts a part of the table 13, whereby the lifting body 22 is stopped at the uppermost position. Further, the lifting body 22 is driven downward by the fluid supply to the upper pressure chamber, and the projecting piece 22a of the lifting body 22 engages with the stopper 13a on the table 13, so that the lifting body 22 is at the lowermost position. Be stopped.

A pair of pressure chambers are formed in the cylinder inside the chuck 23, and each pressure chamber and the upper fluid piping device 28 form a pair of connection passages (not shown) inside the table 13 and this connection passage. A pair of pipes 22b connected to each other, a connecting path (not shown) inside the elevating body 22 slidably connected to the pipe 22b, and a hose 30 that connects the connecting path inside the elevating body 22 and the cylinder. Has been done. The chuck 23 is driven by the fluid supply to the parallel open / close chuck 23, the hand 23a grips the work by the fluid supply to one pressure chamber of the parallel open / close chuck 23, and the hand 23a is supplied by the fluid supply to the other pressure chamber. Releases the work.

By appropriately combining the fluid switching supply to the rodless cylinder C, the vertical cylinder 24, and the cylinder in the chuck 23, after gripping the work according to a predetermined operation pattern, the work is different from the gripping position. You can set an operation such as transporting to. For example, after the chuck 23 moves downward from the origin position on the upper left side and grips the work on the lower left position, the chuck 23 releases the work at the lower right position and returns to the origin position on the upper left side again. It is possible to operate.

Next, the fluid piping devices 27 and 28 of this embodiment will be described in detail. As shown in FIG. 4, the fluid piping device 27 for the parallel opening / closing chuck 23 and the fluid piping device 28 for the vertical cylinder 24 are vertically overlapped with each other, and both are connected and fixed by bolts 29.

As shown in FIGS. 1 and 2, the fluid piping device 27 includes a pair of telescopic pipes P ₁ and P ₂ . One telescopic pipe P ₁ is connected to the upper pressure chamber of the parallel opening / closing chuck 23, and the other telescopic pipe P ₂ is connected to the lower pressure chamber. That is, the telescopic pipe P ₁ is for approaching the hand 23a of the parallel opening / closing chuck 23, and the telescopic pipe P ₂ is for spacing the hand 23a.

One telescopic pipe P₁Is one accommodating pipe P that is slidably connected in series_1a And two movable pipes P_1b, P_1cAnd the other telescopic pipe P_TwoIs a single accommodating pipe P that is slidably connected in series._2aAnd two movable pipes P_2b, P _2c It is composed of Telescopic pipe P₁, P_TwoA pair of storage pipes P located on the base end side of the_1a, P_2aAt one end of the first connection block B₁Is fixed and each accommodation pipe P_1a, P_2aIs the first connection block B₁It is connected to the connection ports 31A and 31B on the end face.

Movable pipe P_1b, P_2bStorage pipe P connected to_1a, P_2aThe second connection block B at the connection end of_TwoIs fastened. Movable pipe P_1b, P_2bIs the second connection block B _Two Pipe P penetrating through_1a, P_2aThe second connection block B._Two Movable pipe P inside_1b, P_2bSeal ring B with a Y-shaped cross section to prevent fluid leakage on the peripheral surface of_2bIs arranged, and the second connection block B_TwoSeal ring B_2bCover B on the placement surface of_2aAre joined and fixed.

Movable pipe P_1c, P_2cMovable pipe P to connect with_1b, P_2bThe third connection block B at the connection end of_ThreeIs fastened. Movable pipe P_1c, P_2cIs the third connection block B _Three Pipe P penetrating through_1b, P_2bThe third connection block B_Three Movable pipe P inside_1c, P_2cSeal ring B with a Y-shaped cross section to prevent fluid leakage on the peripheral surface of_3bIs arranged, and the third connection block B_ThreeSeal ring B_3bCover B on the placement surface of_3aAre joined and fixed.

A fourth connection block B ₄ is fixed to the ends of the movable pipes P _1c and P _2c located on the ends of the expandable pipes P ₁ and P ₂ . Connection ports 34A, 34B are provided on the end surface of the fourth connection block B ₄ , and the movable pipes P _1c , P _2c are connected to the connection ports 34 A, 34B.

A guide rod 35 is installed between the second, third and fourth connecting blocks B ₂ , B ₃ and B ₄ , and a substantially central portion of the guide rod 35 is fixed to the third connecting block B ₃ . It is being touched. The guide rod 35 is slidably pierced through the second and fourth connecting blocks B ₂ and B ₄ , and the guide rod 35 slides on the sleeves provided on the second and fourth connecting blocks B ₂ and B _4. It is supported by 36, 37 and 38.

A pair of nuts 39A and 39B are screwed and fixed to one end of the guide rod 35, and a pair of nuts 47A and 47B are also screwed and fixed to the other end. The length of the guide rod 35 and the positions of the nuts 39A and 39B and the nuts 47A and 47B are such that the storage pipes P _1a and P _2a , the movable pipes P _1b and P _2b , and the movable pipes P _1c and P _2c are connected to each other. It is set so that it will not come out. That is, the guide rod 35, the connecting blocks B ₂ , B ₃ , B ₄ and the nut 39 constitute a retaining mechanism.

The fluid piping device 28 is not provided with a retaining mechanism like the fluid piping device 27, but other configurations are the same as those of the fluid piping device 27. One telescopic pipe P ₃ of the fluid piping device 28 is connected to the upper pressure chamber of the vertical cylinder 24, and the other telescopic pipe P ₄ is connected to the lower pressure chamber. That is, the telescopic pipe P ₃ is for moving the lifting body 22 downward, and the telescopic pipe P ₄ is for moving the lifting body 22 upward.

The two piping devices 27, 28 include connection blocks B ₁ , B ₂ , B ₃ , B ₄ on the fluid piping device 27 side and connection blocks D ₁ , D ₂ , D ₃ , D ₄ on the fluid piping device 28 side. The expansion / contraction pipes P ₃ and P ₄ on the side of the fluid piping device 28 are shared by the retaining mechanism of the fluid piping device 27.

When the fluid piping device 27 is shortened, each connection block B_Two, B_Three, B_FourSlide on the peripheral surface of the guide rod 35 in the series direction and abut each other, and the nuts 39A and 39B at both ends of the guide rod 35 are connected to the respective connection blocks B._Two, B_FourSeparate from. Then, in the fully shortened state of the fluid piping device 27 shown in FIGS. 1 and 2, the accommodation pipe P is _1a , P_2aMovable pipe P inside_1b, P_2bIs slid and accommodated, and the movable pipe P _1b , P_2bAnother movable pipe P inside_1c, P_2cIs accommodated in a slide. Therefore, the expansion / contraction pipe P₁, P_TwoShortens the total length of. The fluid piping device 28 is also integrally linked to the shortening of the fluid piping device 27.

In this configuration, the movable part of the expandable pipe P ₁ is composed of a plurality of movable pipes P _1b and P _1c , and the movable part of the expansion pipe P ₂ is composed of a plurality of movable pipes P _2b and P _2c. Since P _1b and P _1c will house the movable pipes P _2b and P _2c , the movable parts P _1b and P _1c and P _2b and P _2c themselves will also be shortened. Therefore, the accommodation pipes P _1a and P _2a for accommodating these movable parts P _1b , P _1c and P _2b and P _2c can be shortened to about 2/3 of the conventional one.

The housing pipes P _1a and P _2a are arranged outside the ends of the rodless cylinder C, and the movable parts P _1b , P _1c and P _2b and P _2c move along the peripheral surface of the rodless cylinder C. . The accommodating pipes P _1a and P _2a , which are shorter than the conventional ones, bring about a compact installation space for arranging them outside the end of the rodless cylinder C, and as a fluid actuator on the table 13 of the rodless cylinder C. The miniaturization of the entire system of this embodiment equipped with the parallel opening / closing chuck 23 can be achieved. That is, without impairing the advantage peculiar to the rodless type cylinder C that the stroke range of the table 13 equipped with the fluid type actuator is approximately equal to the cylinder length of the rodless type cylinder C as much as possible, the fluid piping device of the present embodiment. 27, 28 can be attached.

When the fluid piping device 27 is extended, the connection blocks B ₂ , B ₃ , and B ₄ slide on the circumferential surface of the guide rod 35 in the direction in which they are separated from each other. Then, in the completely extended state of the fluid piping device 27 shown in FIG. 3, the movable pipes P _1b and P _2b accommodated in the accommodation pipes P _1a and P _2a are slid out and the movable pipes P _1b and P _1b are removed. _The other movable pipes P _1c and P _2c accommodated in _2b are slid out and the total length of the telescopic pipes P ₁ and P ₂ is extended. This extension is determined by the stroke of the rodless cylinder C, and in this extended state, the nuts 39A, 39B at both ends of the guide rod 35 do not contact the respective connection blocks B ₂ , B ₄ . The distance between the connection blocks B ₁ and B _{4 at} both ends does not increase any more, but if the nuts 39A, 39B and 47A, 47B are not present, the third connection block B ₃ will be replaced by the other connection blocks B ₁ , B ₂ , It is movable with respect to B ₄ , and _{disconnection} occurs between the pipes P _1a and P _2a and the pipes P _1b and P _2b , or between the pipes P _1b and P _2b and the pipes P _1c and P _2c . However, the presence of the nuts 39A, 39B and 47A, 47B prevents _{disconnection} of the pipes P _1a , P _1b , P _1c and P _2a , P _2b , P _2c . The fluid piping device 28 is also integrally linked to the extension of the fluid piping device 27.

By connecting the connection ports 31A and 31B of the fluid piping device 27 to the fluid supply side and connecting the connection ports 34A and 34B to the parallel opening / closing chuck 23 side, the moving position of the parallel opening / closing chuck 23 can be improved. driving fluid connection ports 31A regardless, 31B, telescopic pipe P _1, P ₂ and connection ports 34A, is reliably introduced into the parallel opening and closing the chuck 23 through 34B. Also, by connecting one connection port of the fluid piping device 28 to the fluid supply side and the other connection port to the vertical cylinder 24 side, the drive fluid is moved up and down regardless of the moving position of the vertical cylinder 24. It is securely introduced into the direction cylinder 24.

Each expansion pipe P₁, P_Two, P_Three, P_FourThe air flowing through the pipe leaks from the connection part between the pipes connected in series._2b, B_3bConnection block B due to the presence of_Two, B_ThreeIs prevented from leaking to the outside. Seal ring B_2b, B _3b Is cover B_2a, B_3aDetached to remove, deteriorated seal ring B_2b, B_3bCan be easily replaced with a new seal ring.

Further, according to the configuration of the guide rod 35 of the present embodiment, the weakness of the connection strength at the connecting portions of the expansion pipes P ₁ , P ₂ , P ₃ , P ₄ is compensated by the guide rod 35, and the expansion pipe P is expanded. _The guide rod 35 suppresses the bending of ₁ , P ₂ , P ₃ , and P ₄ . Therefore, the smooth expansion / contraction operation of the expansion / contraction pipes P ₁ , P ₂ , P ₃ , P ₄ is ensured, and the uneven wear of the seal rings B _2b , B _3b is prevented.

10 and 11 are provided with a retaining mechanism which is different from the retaining mechanism of the above-described embodiment and which includes the guide rod 35, the connection blocks B ₂ , B ₃ , B ₄ and the nuts 39A, 39B. Fluid piping devices 40, 50 are shown.

In the fluid piping device 40 of FIG. 10, a retaining ring 41 is fitted to the proximal ends of the movable pipes P _1b and P _{2b in} the accommodation pipes P _1a and P _2a . A retaining ring 42 is also fitted to the base ends of the movable pipes P _1c and P _{2c in} the movable pipes P _1b and P _2b . According to this configuration, the retaining ring 41 abuts on the stepped portion 43a of the hole 43 formed in the second connecting block B ₂ when the expansion pipes P ₁ and P ₂ are maximally extended, and the retaining ring 42 makes the third connection. abuts against the stepped portion 44a of the hole 44 drilled in the block B _3. Due to the contact between the retaining rings 41 and 42, the connection blocks B ₂ , B ₃ and B ₄ are not separated from each other. According to this structure of another example, _{disconnection of} the pipes P _1a , P _1b , P _1c can be prevented without using the guide rod 35 of the embodiment.

FIG. 11 shows a fluid piping device 50, and in this another example, two guide rods 51 and 52 are provided. The guide rod 51 is installed between the second connection block B ₂ and the third connection block B ₃ . One end thereof is fixed to the third connection block B ₃ , and the other end slidably penetrates into the second connection block B _2. At the other end, a pair of nuts 53A as retaining pieces are provided. , 53B are fixed. The guide rod 52 is installed between the third connecting block B ₃ and the fourth connecting block B ₄ . One end thereof is fixed to the fourth connection block B ₄ , and the other end slidably penetrates to the third connection block B ₃ , and the other end has a pair of nuts 54A serving as retaining pieces. , 54B are fixed. According to the configuration of this another example, both the guide rods 51 and 52 do not project from between the connecting blocks B ₁ and B ₄ even when the expandable pipes P ₁ and P ₂ are shortened. There are advantages.

Of course, the present invention is not limited to the above-described embodiment and other examples, and for example, the guide rod 35 may be arranged on the upper fluid piping device side. It is also possible to arrange them in both the upper and lower fluid piping devices. Further, the present invention is not limited to the above embodiment in which three pipes are connected in series, and it is of course possible to use four or five pipes.

[0043]

[Effect of the invention]

 As described in detail above, according to the invention of claim 1, at least three pipes are slidably connected in series, and a retaining mechanism for preventing connection disconnection between the plurality of pipes is provided. Therefore, it is possible to achieve downsizing while ensuring the pipe length. In addition, the connection block is fixed to the connection end of one of the pair of pipes connected in series, and the other pipe is slidably inserted into the connection block. The other pipe expands and contracts while being slidably guided by the connection block, so that each pipe can be expanded and contracted smoothly.

Further, in the invention according to claim 2, since the other pipe expands and contracts while being slidably guided by the connection block with respect to the one pipe, one edge of the seal ring provided in the connection block is prevented. Therefore, the sealability of the seal ring can be maintained for a long period of time.

[Brief description of drawings]

FIG. 1 is a perspective view showing a shortened state of a fluid piping device in an article conveying device.

FIG. 2 is a plan sectional view showing a shortened state of the fluid piping device of FIG. 1;

FIG. 3 is a plan sectional view showing an extended state of the fluid piping device of FIG. 1;

FIG. 4 is a perspective view showing a shortened state when the fluid piping devices are combined vertically.

FIG. 5 is an overall front view of the article conveying device (a shortened state of the fluid piping device).

FIG. 6 is an overall plan view of FIG. 5;

FIG. 7 is an overall side view of FIG. 5;

FIG. 8 is a partially enlarged sectional view of FIG. 5;

FIG. 9 is an overall front view of the article transport device (in an extended state of the fluid piping device).

FIG. 10 is a cross-sectional plan view showing an extended state of another example of the fluid piping device.

FIG. 11 is a plan sectional view showing an expanded state of a fluid piping device of another example.

[Explanation of symbols]

 6 ... Piston, 13 ... Table, 22 ... Actuator
Elevating body constituting 23, ... Comprising actuator
(Parallel open / close) Chuck, P₁, P_Two, P_Three, P_Four… Expansion and contraction
Pipe, P_1a, P_2a… (Accommodation) pipe, P_1b, P_1c, P
_2b, P_2c… (Movable) pipe, 35… Configure a retaining mechanism
Guide rods, 39A, 39B, 47A, 47B ...
The nut that constitutes the retaining mechanism (as a retaining piece)
G, B_Two, B _Three, B_Four… Configure a retaining mechanism (
2, 3rd and 4th) connection block, C ... (rodless
Formula) cylinder.

Claims (2)

[Utility model registration claims] 1. A fluid piping device comprising at least three pipes slidably connected in series, and a retaining mechanism for preventing connection disconnection between the plurality of pipes, the pair being connected in series. A fluid piping device in which a connection block is fixed to the connection end of one of the pipes, and the other pipe is slidably inserted into the connection block. 2. The fluid piping system according to claim 1, wherein the connection block fixed to the one pipe is provided with a seal ring that abuts an outer peripheral surface of the other pipe.