JP3302508B2 - Work support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressurized air circuit connecting device, for example, a pneumatic oil pump from a pressurized air supply source.
Equipped with a highly durable pressure fluid circuit connection device that can easily and quickly open and close the pressurized air circuit to the load equipment of the pressurized air such as an air-driven pressure intensifier, and shortens the work on the processing line in a short time. The present invention relates to a work supporting device that can be replaced by a work supporting device and that can effectively use the dead space of the work supporting device to reduce the storage space for the work supporting device and the work replacing work space.

[0002]

2. Description of the Related Art In recent years, as processing lines have been automated, for example, as shown in the plan view of FIG. A pallet 102 is intermittently circulated by placing a work supporting device 103 supporting a work on the pallet 102.
A machining line is used to machine the workpiece with a cutting machine, a grinding machine, a machining center, etc. facing the 01.

[0003] The work support device 103 has a base plate and a cylindrical block erected on the base plate.
After the work is supported on the outer surface of the block via a work clamp outside the processing line, the work is carried into the production line together with the work supporting device 103 by the loader 104. The work support frame 103 is rotated around the vertical axis on the pallet 102 as necessary at each processing stage where the pallet 102 stops, so that each work fixed on a plurality of outer surfaces of the block is processed in order. I have.

When a series of machining of each work is completed by circulating through the work processing line, the work support device 103 is taken out of the work line by the unloader 105, and the work processed outside the work line is removed from the work support device 103. I have. By the way, as a work clamp used in this type of work support device 103, a work support which is put in and out of a work processing line, moves on the work processing line, and rotates on a pallet 102 as necessary. Since hydraulic piping to the device is difficult, a hydraulic work clamp is not used and the base fixed to the block by bolts and nuts, the clamp pawl supported by the base, and the clamp pawl in the tightening direction. A screw type having a screw for moving forward and backward is used.

[0005] The clamp claw is provided so that its tip can move forward and backward in a direction perpendicular to the outer surface of the block.
There are two types, one of which is provided so as to be able to advance and retreat in parallel with the outer surface of the block, and the other is so provided that it is capable of being advanced and retracted in a direction inclined with respect to the outer surface of the block. The work clamp is provided such that the tip of the clamp claw can advance and retreat in a direction perpendicular to the outer surface of the block. The work is sandwiched and fixed between the outer surface of the work.

Further, in a work clamp in which the tip of a clamp claw is provided so as to be able to advance and retreat in parallel with the outer surface of the block, a side surface of the work is blocked by the clamp claw by tightening a screw inserted through the base so as to advance and retreat. Fix the work by pressing it against another work clamp or reference block fixed to the work. Further, in a clamp provided such that the tip of a clamp claw can advance and retreat in a direction inclining with respect to the outer surface of the block, a screw inserted into the base so as to advance and retreat can be tightened, and the workpiece can be removed from the block by the clamp. The work is fixed by pressing it against the side surface and another work clamp or reference block fixed to the block.

Therefore, in the conventional work supporting device,
When exchanging a processed and unprocessed work, it is necessary to loosen the screws that tighten the clamp claws, remove the processed work, and re-tighten the screws while accurately positioning the unprocessed work. Therefore, there is a possibility that the time required for work replacement becomes long. In addition, particularly, the tact time of the machining line, that is, the pallet 102
If the time during which the machine is stopped is shorter than the work change time, prepare more work support devices 103 than work support devices 103 that can be mounted on the machining line in order to eliminate time loss on the machining line. Therefore, it is necessary to perform work exchange of a plurality of work support devices 103 simultaneously and parallel outside the machining line.Therefore, it is necessary to provide a large storage area for storing a large number of work support devices 103 or to perform work exchange work. It becomes necessary to provide a large work place.

The present inventor has, for example, as shown in FIG. 7, a base plate 201 and a cylindrical block 202 erected thereon.
Assuming a work support device that supports the work 205 on the work clamp 203 via the work clamp 204, the work
We have invented a work supporting device that can replace 205 in a short time and effectively reduce the storage space of the work supporting device and the work replacement work space by effectively utilizing the dead space of the work supporting device.

That is, the work clamp 204 is constituted by a hydraulic work clamp 204, an oil tank 206 for storing hydraulic oil in a hollow portion 209 of the block 202, and a hydraulic oil is sucked from the oil tank 206 to a predetermined position. And an air-driven oil pump 207 that discharges at a predetermined pressure, and controls supply of hydraulic oil discharged from the oil pump 207 to the work clamp 204 and discharge of hydraulic oil from the work lamp 204 to the oil tank 206. The work supporting device having the directional control valve 208 was invented prior to the present invention.

In this work supporting apparatus, it is necessary to supply pressurized air for driving to the oil pump 207 when attaching / detaching or replacing the work. In addition, it is possible to provide a pressurized air pipe for supplying pressurized air as a drive source to each work supporting device because the work support line is moved on the work processing line and further rotated on the pallet 102 as necessary. It's not easy.

Further, the supply of pressurized air to the work supporting device is sufficient only when the work is attached or detached or when the work is exchanged. Attempts were made to connect them manually by means of joints, etc., and to separate them after attaching / detaching or replacing the work.

[0012]

However, the manual connection and disconnection of the pipes is disadvantageous in terms of improving workability, and the rapid joints and the like are connected or disconnected by mechanical operation. If it does, the connection part of the quick coupling will be easily damaged or deformed by mechanical force,
It turned out to be disadvantageous in improving durability.

In view of the above circumstances, the present invention provides a pressure fluid circuit connection device that can easily and quickly interrupt a pressure fluid circuit from a pressure fluid supply source to a load device and has high durability. It is an object of the present invention to solve a technical problem of providing a work supporting device.

[0014]

In order to achieve the above object, the present invention has a base plate and a cylindrical block erected on the base plate, and supports a work on an outer surface of the block. An oil pump configured to store the hydraulic oil in a hollow portion of the block, a hydraulic pump that sucks the hydraulic oil from the oil tank and discharges the hydraulic oil at a predetermined pressure, A work support device in which a directional control valve for controlling supply of hydraulic oil discharged from the work clamp to the work clamp and discharge of the hydraulic oil from the work clamp to the oil tank is arranged, one end of which is opened, and the other end of which has a pressure A block having a valve chamber communicated with a fluid supply source, a valve body inserted into the valve chamber so as to be able to advance and retreat, and having one end protruding out of the valve chamber; and a valve body formed concentrically with the valve body. And a different diameter hole which is enlarged at one end side, a valve seat arranged opposite to the variable diameter portion of the different diameter hole, fixed to the block via a stem, and A valve closing spring that urges the variable diameter portion of the different diameter hole against the valve seat by urged against the valve body, the valve body is slidably slidable into the valve chamber, and the sleeve is hermetically sealed therein. A main valve body slidably and airtightly fitted in the sleeve, the sleeve drives the main valve body when the sleeve moves inside the valve chamber, and the main valve is closed by a valve closing spring. After the body is received by the valve seat, the sleeve is pressed against the peripheral portion of the valve seat by the internal pressure of the valve chamber, and is fixed to a supply port provided in a load device to which the pressurized fluid is supplied, and receives one end of the valve body. A pressure fluid circuit connection device provided with a plate for communicating the different diameter holes to the supply port. The pressurized fluid supply source is connected to the load device by pressing it against the supply port of the load device, and the load device can be separated from the pressurized fluid supply source by separating the main body and valve body from the load device supply port. And

[0015]

The pressure fluid supply passage is shut off from the outside by the valve closing spring contacting the variable diameter portion with the valve seat, but one end of the valve body is airtight around the supply port provided in the load circuit. When the block is pushed into the load circuit side against the valve-closing spring, the variable diameter portion is separated from the valve seat and opened, and the pressure fluid supply source communicates with the supply port through the different diameter hole. Is done.

Also, when the block is moved away from the load circuit from this state, the variable diameter portion of the different diameter hole is received by the valve seat, and the different diameter hole is closed by the valve seat. Keep away from

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a pressure fluid circuit connection device according to an embodiment of the present invention will be specifically described with reference to the attached drawings, but the present invention is not limited to this embodiment.
The present invention, which becomes apparent from the entire description of the present specification and the accompanying drawings, extends to a whole range of technical ideas that are truly intended.

As shown in the sectional views of FIGS. 1 and 2,
A pressure fluid circuit connection device according to one embodiment of the present invention is one in which the present invention is applied to a pressurized air circuit connection device that connects a pressurized air supply source to a load device 2, and the pressurized air supply source is connected. And a seat 3 provided on the load device 2. The main body 1 includes a block 4, a valve element 5, a valve seat 6,
A valve chamber 10 is provided which includes a stem 7 and a valve closing spring 8, one end of which is open to the block 4, and the other end of which communicates with a pressurized air supply source via a supply path 9.

The valve body 5 may be formed as an integral cylindrical body having a different diameter hole 11 which is enlarged at one end side of the valve body 5 along the central axis. A sleeve 12 formed of a tubular body that is inserted into the valve chamber 10 so as to be able to advance and retreat and has one end protruding outside the valve chamber 10, and a cylindrical main valve body 13 that is internally fitted in the sleeve 12 so as to be able to advance and retreat. Split and form sleeve 12
By fitting the main valve body 13 inside the valve body 5, different diameter holes 11 whose diameters are enlarged on both sides in the axial direction are formed in the valve body 5.

A stepped-diameter enlarged diameter portion 14 is formed at the inner end of the main valve body 13, and a step for receiving the enlarged diameter portion 14 from one end side is formed on the inner peripheral surface of the sleeve 12. The attachment surface 15 is formed. The outer end face of the main valve body 13 constitutes an annular valve seat 16, and the valve seat 6 has a portion on the one end side of the valve seat 16 in the sleeve 12, that is, a diameter expansion on one end side of the different diameter hole 11. Part 11
a, and is fixed to the block 4 through the small diameter portion 11 b of the different diameter hole 11, that is, the stem 7 inserted through the center hole of the main valve body 13.

The portion of the valve seat 6 facing the valve seat 16 may be provided with a sealing member made of an annular elastic material, if necessary.
17 is fixed. However, the sealing member 17 may be fixed to the valve seat 16. The valve closing spring 8 is composed of a coil spring inserted between the other end face 18 of the valve chamber 10 and the inner end face 19 of the main valve body 13. 16 is made to contact the sealing member 17 of the valve seat 6 in an airtight manner.

The inner peripheral surface of the sleeve 12 has another stepped surface 20 which is received on the peripheral edge of the valve seat 6 described later from the other end.
Is formed and the sleeve is urged outward by the internal pressure of the valve chamber 10.
12 is received by the peripheral portion of the valve seat 6 to prevent foreign matter such as dust and water from entering between the sealing member 17 of the valve seat 6 and the valve seat 16 of the main valve 13. I have to do it. As a result, the sealing member 17 and the valve sheet 16 are damaged by the foreign matter, or the foreign matter is caught between the sealing member 17 and the valve sheet 16, so that the sealing property between the sealing member 17 and the valve sheet 16 is improved. It is prevented from lowering.

The type of the load device 2 is not particularly limited as long as it uses pressurized air. Here, the load device 2 is constituted by a work supporting device for supporting a work to be processed by a machining machine such as a machining center. I have. As shown in a vertical sectional side view of FIG. 3 and a plan view of FIG. 4, this work supporting device has a base plate 21 and a rectangular cylindrical block 22 erected on the base plate 21. Each outer surface 23 supports a work 25 via a hydraulic work clamp 24.

As shown in FIG. 4, the base plate 21
Is formed in a square shape with four corners chamfered in plan view, and the block 22 is arranged concentrically with the base plate 21 and each outer surface 23 is parallel to four sides of the base plate 21. The work clamp 4 is shown in FIG.
And only one is shown in FIG.
Any number necessary for fixing the work 25 to the arbitrary number of outer surfaces 23 to which are attached.

The work clamp 24 is assembled to a base 26 fixed to the outer surface of the block 2, a clamp claw 28 supported by the base 26 via a support shaft 27 so as to be swingable by a seesaw, and the base 26. The base 26 is fixed to the block 22 by, for example, bolts. When hydraulic oil is supplied to the hydraulic cylinder 29, the piston rod 30 advances to drive the base end of the clamp claw 28 outward.

An oil tank 32 for storing hydraulic oil in a hollow portion 31 of the block 22, an oil pump 33 for sucking hydraulic oil from the oil tank 32 and discharging the oil at a predetermined pressure, and an oil pump 33
A directional control valve 34 for controlling the supply of the working oil discharged from 33 to the work clamp 24 and the discharge of the working oil from the work lamp 24 to the oil tank 32 is provided. The oil pump 33 is disposed at the upper central portion of the oil tank 32, as shown in FIG.
As shown in the pneumatic / hydraulic circuit diagram, driven by pressurized air supplied from an external pressurized air supply source, the hydraulic oil in the oil tank 32 is sucked through the filter 35 and pressurized to a predetermined pressure. It consists of a pneumatic booster (booster pump) that discharges air. The oil pump 33 is configured to automatically stop when the internal pressure of the load circuit connected to the discharge port reaches a predetermined value, and to automatically restart when the internal pressure of the load circuit falls below the predetermined value. ing.

Although the number of the direction control valve 34 may be one, in this embodiment, in order to control the operation of the work clamp 24 for each side of the block 22, as shown in FIG. Four directional control valves 34 are provided around an oil pump 33 above the oil tank 32. Each directional control valve 34 is switched between two positions by electromagnetic operation or pneumatic operation, and as shown in FIG. 5, a supply passage 36 that connects the work clamp 24 to the discharge port of the oil pump 33 and a return oil passage that connects the work clamp 24 to the return oil passage. 38
And a return passage 37 communicating with the oil tank 32 through
In the supply passage 36, a check valve 39 for sealing the working oil supplied to the work clamp 24 into the work clamp 24 is interposed.

Further, as shown in FIGS. 3 and 4, in order to stably connect a pressurized air source such as an external factory pressurized air pipe to the oil pump 33, the pressurized air circuit connecting device is used. The seat 3 is screwed to one outer surface of the block 22, for example. However, the place where the receiving seat 3 is attached is not limited to the one outer surface of the block 22, and may be attached to the upper end surface of the block 22, or the receiving seat 3 may be attached to one lateral side of the base plate 21, for example. It is.

As shown in FIGS. 1 and 2, the seat 3 has a donut plate-like plate 40, a connecting tube 41 inserted through the plate 40 and projecting from the back of the plate 40, and Nut 42 for fixing tube 41 to plate
And a sealing member 43 made of an annular elastic body fixed to the front of the plate 40 so as to surround the connection pipe 41. The outer end surface of the valve body 5 of the main body 1 is attached to the sealing member 43. We take it in an airtight manner.

The connection pipe 41 is screwed to one outer surface of the block 22. The hollow portion 44 of the connection pipe 41 is connected to a pressurized air circuit in the work supporting device as shown in FIGS. It is communicated via 45 with a reciprocating motion generating engine 46 driven by the air of the oil pump 33. The work 25 is attached to and detached from the work support device, or the processed work 25 supported by the work support device
In the workpiece exchange stage for exchanging the workpiece with the unprocessed workpiece 25, the workpiece support device faces in a certain direction,
It is set at a predetermined position.

The main body 1 is provided on the work exchange stage so that the main body 1 can move toward and away from the seat 3 so that the outer end surface of the valve body 1 faces the seat 3 fixed to the set work supporting device. Can be When the main body 1 is advanced toward the receiving seat 3 by, for example, a cylinder, the outer end surface of the sleeve 12 abuts on the sealing member 43 of the receiving seat 3 in an airtight manner. When advanced to the seat 3 side, the sleeve 12 receives the enlarged diameter portion 14 of the main valve body 13 and compresses the valve closing spring 8 via the main valve body 13 to push the main valve body 13 into the valve chamber 10. Move away from valve seat 6. Thereby, the pressurized air supply source is communicated with the reciprocating motion generating engine 46 driven by the air of the oil pump 33 via the valve chamber 10, the different diameter hole 11, the connection pipe 41, and the pressurized air circuit 45. The oil pump 33 is started.

When the hydraulic pump 33 is started, the oil tank 32
The hydraulic oil in the pump is sucked by the oil pump 33 and is discharged from the oil pump 33 at a predetermined pressure. When the discharge pressure reaches a predetermined value, the oil pump 33 automatically stops. Here, when the direction control valve 34 is switched to the position where the work clamp 24 is connected to the oil tank 32, the cylinder 29 of the work clamp 24 is instantaneously depressurized, and the clamp claws 28 are manually pressed against the hydraulic cylinder 29 by hand. The tip is swung in a direction away from the outer surface 23 of the block 22 to widen the gap between the tip of the clamp claw 28 and the outer surface 23 of the block 22. Work 25 can be replaced.

After positioning the unprocessed work 25 at a predetermined position of the block 22, the position of the direction control valve 34 is switched, and
When the work clamp 24 is connected to the oil pump 33, the oil pump
Hydraulic oil discharged from 33 is instantaneously supplied to the cylinder 29 of the work clamp 24, and the tip of the clamp claw 28 driven by the piston rod 30 causes the work 25 to move the outer surface of the block 22.
Press it against 23 to fix it.

Therefore, the work can be replaced in a much shorter time than the conventional screw-type work clamp for loosening or tightening the screw, for example, in a time shorter than the tact time of the work line of the work. as a result,
Even if the work is exchanged on the processing line, it is not necessary to extend the tact time of the processing line, and it is sufficient to provide the same number of work supporting devices as the number of pallets on the processing line. Accordingly, it is not necessary to provide a place for storing the work supporting device outside the processing line, and the size of the work place for the work replacing operation can be reduced to a size required for the work replacement of one work supporting device.

Further, even if the work exchange is performed outside the machining line, it is not necessary to exchange the work of a large number of work support devices in parallel, and a work area having a size necessary for the work exchange work of one work support device is provided. Since it suffices to provide them, the work space for work replacement can be reduced, and the number of work workers for work replacement can be reduced. In addition, since the oil tank 32, the oil pump 33, and the direction control valve 34 are arranged in the hollow portion 31 in the block 22, which has been a dead space, the dead space can be increased without increasing the space occupied by the work supporting device. Can be used effectively, which is further advantageous in saving space.

After the attachment / detachment or replacement of the work is completed,
When the main body 1 is separated from the load device 2, first, the main valve body 13 is urged by the valve closing spring 8 to move outward, and the valve seat 16 is received by the sealing member 17 of the valve seat 6 in an airtight manner. Thereby, the different-diameter holes 11 are blocked, and pressurized air is prevented from being ejected from the different-diameter holes 11 to the surroundings. Thereafter, the sleeve 12 moves further outward due to the internal pressure of the valve chamber 10, and is received by the peripheral portion of the valve seat 6, whereby foreign matter enters between the valve seat 16 and the sealing member 17 opposed thereto from outside. Is prevented.

That is, the load device 2 can be quickly connected to the pressurized air supply source by an extremely simple operation of moving the main body 1 toward the receiving seat 3 provided on the load device 2,
For example, the pressurized air supply source can be disconnected from the load device 2. Further, since the operation of the main body 1 is simple, the operation of the main body 1 can be easily mechanized by using a cylinder, a solenoid or the like very easily.

Further, since the seat 3 and the valve body 5 are not mechanically engaged with each other, there is no possibility that the seat 3 or the valve body 5 is damaged or deformed by mechanical force during the intermittent operation. Durability is increased. In the above embodiment, the receiving device 3 is provided on the load device 2. However, it is not necessary to provide the receiving device 3, and a receiving surface for receiving the outer end surface of the valve element 5 in an airtight manner is provided on the load device 2. The pressurized air supply port of the load device 2 can be configured to be opened in the receiving surface. In this case, it is preferable to provide a sealing member made of an elastic body for sealing between the receiving surface and the outer end surface of the sleeve 12 on the receiving surface or the outer end surface of the sleeve 12.

The configuration of the present invention can be applied to not only the pressurized air supply circuit but also a pressure oil circuit for supplying pressure oil to the load device 2. However, in this case, unlike the case of pressurized air, in order to prevent the pressurized oil, which is the pressurized fluid, from leaking from the load device and scattering around, the load device side receives the pressurized oil supply port. Preferably, a self-sealing valve for automatically closing the pressure oil supply port when the main body is removed is provided.

[0040]

As described above, the pressurized air circuit connecting device according to the present invention has a block having a valve chamber whose one end is open and the other end of which is connected to a pressurized air supply source. A valve body which is inserted into the chamber so as to be able to advance and retreat, and one end of which protrudes out of the valve chamber; a different diameter hole formed concentrically with the valve body in the valve body and expanded at one end side; And a valve seat fixed to the block via a stem, and the valve body is urged toward one end thereof to abut the variable diameter portion of the different diameter hole against the valve seat. And a valve closing spring.

With this, the pressurized fluid supply source can be quickly connected to the load device in a short time by a simple operation of pressing the main body and the valve body to the supply port of the load device, and the main body and the valve body can be loaded. The load device can be quickly separated from the pressurized fluid supply source by a simple operation of separating from the device supply port. Further, since the pressurized fluid circuit between the pressurized fluid supply source and the load device can be intermittently operated by such a simple operation, it is easy to mechanize the intermittent operation, which is advantageous in saving power.

Further, since the main body and the valve body are not mechanically engaged with the load device or the seat provided on the load device, the connecting portion of the main body and the load device may be damaged by mechanical force during the connection operation or the disengagement operation. There is no danger of being deformed or deformed, and the durability can be increased. In the present invention, in particular, fixed to a supply port provided in a load device to which a pressure fluid is supplied,
When a plate is provided for receiving one end of the valve element and communicating the different diameter hole to the supply port, the valve element can be connected to the load equipment with good stability, and the connection stability can be improved, which is advantageous. .

In the present invention, in particular, the valve body is slidably and airtightly fitted in the valve chamber, and the sleeve is slidably and airtightly fitted in the sleeve. When the sleeve moves inside the valve chamber, the sleeve drives the main valve body, and after the main valve body is received by the valve seat by the valve closing spring, the sleeve is moved to the valve chamber. In the case of being configured to be pressed against the peripheral edge of the valve seat by the internal pressure of the valve seat, foreign matters can be prevented from entering the contact portion between the main valve body and the valve seat due to the contact between the sleeve and the valve seat, thereby This prevents the contact between the main valve body and the valve seat from being damaged by foreign matter, or the foreign matter from being pinched between the main valve body and the valve seat, resulting in reduced sealing between the main valve body and the valve seat. This is advantageous because it can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention at the time of connection.

FIG. 2 is a cross-sectional view of one embodiment of the present invention at the time of separation.

FIG. 3 is a vertical side view of a load device to which an embodiment of the present invention is applied.

FIG. 4 is a plan view of a load device to which an embodiment of the present invention is applied.

FIG. 5 is an air / hydraulic circuit diagram of a load device to which an embodiment of the present invention is applied.

FIG. 6 is a plan view of a general work processing line.

FIG. 7 is a longitudinal sectional side view of a load device invented prior to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Block 2 ... Load equipment 5 ... Valve body 6 ... Valve seat 7 ... Stem 8 ... Valve closing spring 10 ... Valve chamber 11 ... Different diameter hole 12 ... Sleeve 13 ... Main valve body 16 ... Valve seat 40 ... Plate 47 ... Air pressure Switching valve

Claims (1)

(57) [Claims] A work clamp for supporting a work on an outer surface of a base plate having a base plate and a cylindrical block provided upright on the base plate is constituted by a hydraulic work clamp. An oil tank that stores hydraulic oil in a hollow portion, an oil pump that sucks hydraulic oil from the oil tank and discharges the hydraulic oil at a predetermined pressure, and supplies hydraulic oil discharged from the oil pump to the work clamp and In a work supporting device in which a directional control valve for controlling discharge of hydraulic oil from a work clamp to an oil tank is arranged,
A block having a valve chamber open at one end and the other end communicating with the pressure fluid supply source, a valve element inserted into the valve chamber so as to be able to advance and retreat, and having one end projecting out of the valve chamber; A different diameter hole that is formed concentrically with the valve body and is enlarged at one end side, and a valve seat that is arranged to face the variable diameter portion of the different diameter hole and fixed to the block via a stem, A valve closing spring for urging the valve body toward one end thereof to abut the variable diameter portion of the different diameter hole against the valve seat, so that the valve body can slide in the valve chamber, and in an airtight manner. An inner sleeve and a main valve body slidably and air-tightly inserted into the sleeve, and the main valve body moves when the sleeve moves inside the valve chamber. After being driven and the main valve body is received by the valve seat by the valve-closing spring, the sleeve is pressed against the periphery of the valve seat by the internal pressure of the valve chamber. A pressure fluid circuit connecting device fixed to a supply port provided in a load device to which the pressure fluid is supplied, provided with a plate for receiving one end of the valve body and communicating a different diameter hole to the supply port, and a main body and The load device can be separated from the pressurized fluid supply source by pressing the valve body against the load device supply port to connect the pressurized fluid supply source to the load device, and pulling the main unit and valve body away from the load device supply port. A work supporting device.