JP7181012B2 - Spool valve and method of extracting the spool valve - Google Patents

Description

The present invention relates to a spool valve, a valve assembly, and a spool valve extracting method, and more particularly to a spool valve inserted into an insertion hole formed in a valve retainer, a valve assembly, and a spool valve extracting method.

BACKGROUND ART As a spool valve, there is known a spool valve that is used by being incorporated in a valve holder such as a manifold in which a fluid passage is formed (for example, Patent Document 1).

In some cases, the spool valve is removed from the valve retainer for maintenance or the like. When the spool valve is inserted into the insertion hole formed in the valve holder, it is necessary to pull out the spool valve from the insertion hole for maintenance or replacement of the spool valve. When the insertion hole is open at both ends, the spool valve can be pushed out from the other opening of the insertion hole by inserting a rod-shaped member or screwing a threaded rod into the insertion hole from one opening of the insertion hole (for example, see Patent Reference 2).

JP-A-10-2433 JP-A-10-252904

However, if the insertion hole is a bottomed hole that is open at one end, the spool valve cannot be pushed out from the insertion hole by the rod-shaped member or the threaded rod.

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to enable a spool valve to be taken out from an insertion hole formed in a valve retainer even if the insertion hole is a bottomed hole.

A spool valve according to one embodiment of the present invention has a valve body (24) in a valve housing (22) and is inserted into an insertion hole (102) formed in a valve retainer (100). 10), the end of the valve housing (22) has engaging portions (50, 52, 54) for pulling out the spool valve (10) from the insertion hole (102).

According to this configuration, the spool valve (10) can be extracted from the insertion hole (102) using the tools (120, 130, 140) that engage with the engaging portions (50, 52, 54).

In the above spool valve, preferably the engaging portion includes a hooked portion (50).

According to this configuration, the spool valve (10) can be pulled out through the insertion hole (102) using the tool (120) hooked on the hook-shaped portion (50).

In the above spool valve, the engaging portion preferably includes a female threaded hole (52) or a male threaded shaft (54).

According to this configuration, the spool valve (10) can be extracted from the insertion hole (102) using the tools (130, 140) screwed into the female threaded hole (52) or the male threaded shaft (54).

A valve assembly according to one embodiment of the present invention comprises a spool valve (10) having a valve housing (22) and a valve body (24) provided within said valve housing (22); and a valve retainer (100) formed with a bottomed insertion hole (102) into which a spool valve (10) is inserted at the end of the valve housing (22). from the insertion hole (102).

According to this configuration, the spool valve (10) can be extracted from the bottomed insertion hole (102) using the tools (120, 130, 140) that engage with the engaging portions (50, 52, 54). .

A method for extracting a spool valve according to one embodiment of the present invention is a method for extracting the spool valve (10) according to the above embodiment from a bottomed insertion hole (102) formed in a valve holder (100). , tools (120, 130, 140) having engaged portions (120B, 130B, 140B) that can be engaged with the engaging portions (50, 52, 54) at the tip end of the insertion hole (102). a step of inserting from (102A) into the insertion hole (102); to the engaging portions (50, 52, 54); pulling out tools (120, 130, 140) from the insertion hole (102) to extract the spool valve (10) from the opening end (102A) of the insertion hole (102) to the outside of the insertion hole (102); have

According to this withdrawal method, the spool valve (10) can be removed from the bottomed insertion hole (102).

According to the spool valve of the present invention, the spool valve can be taken out from the insertion hole formed in the valve retainer even if the insertion hole is a bottomed hole.

FIG. 4 is a cross-sectional view showing a state in which the spool valve according to the present embodiment is assembled in the valve retainer; 1 is a perspective view of a spool valve according to this embodiment; FIG. Sectional view of the spool valve according to the present embodiment FIG. 4 is a perspective view of a spool valve according to another embodiment; FIG. 4 is a perspective view of a spool valve according to another embodiment;

One embodiment of a spool valve according to the invention will now be described with reference to FIGS. 1-3.

As shown in FIG. 1, the valve retainer 100 includes an insertion hole (round hole) 102 into which the columnar (cylindrical) spool valve 10 is inserted, and ports of the spool valve 10 (switching ports to be described later). 25, 26, 28 and pilot ports 30, 32) and an external connection port 106 for each passage 104. The insertion hole 102 is a bottomed hole that opens at one outer surface 100A of the valve holder 100 with an open end 102A.

The spool valve 10 is a pilot type pneumatic switching valve, and as shown in FIG. It has a valve housing 22 with stoppers 18 and 20 and a valve body 24 provided in the valve housing 22 so as to be movable in the axial direction.

The housing body 12 is formed with three switching ports 25, 26, 28 and two pilot ports 30, 32. As shown in FIG. The valve body 24 has two lands 34 and 36, one end surface 24A of which is in contact with the stopper surface 19 at the tip of the end plug 18 at the first switching position, and the other end surface 24B of which the end surface 24B of the end plug 20 is positioned. It can reciprocate between the second switching position where it abuts against the stopper surface 21 at the tip. Valve housing 22 defines pilot chambers 40, 42 between valve body 24 and end plug 18 and between valve body 24 and end plug 20, respectively.

When the air pressure (pilot pressure) of a predetermined value or more is supplied from the pilot port 32 to the pilot chamber 42, the valve body 24 is positioned at the first switching position as shown in FIG. Communication between 26 and 28 is blocked and communication between switching ports 26 and 25 is established. When air pressure of a predetermined value or more is supplied from pilot port 30 to pilot chamber 40, valve body 24 is positioned at the second switching position to cut off communication between switching ports 26 and 25, and switch ports 26 and 28 are closed. establish communication with

A plurality of O-rings 44 are attached to the outer periphery of the housing body 12 . A plurality of O-rings 46 are attached to the outer periphery of the valve body 24 . An O-ring 48 is attached to the end plugs 18 and 20 .

At the outer end of the end plug 18 in the axial direction, that is, one of the extreme ends of the valve housing 22, there is an engaging portion for pulling out the spool valve 10 from the insertion hole 102, as shown in FIGS. A hook-shaped portion 50 is formed.

The hook-shaped portion 50 extends in the axial direction of the end plug 18 and opens into the outer end surface 18A and the outer peripheral surface 18B to form an axial slit 50A, and extends radially of the end plug 18 into the axial slit 50A. A T-shape is formed by a radial slit 50B that communicates with the outer peripheral surface 18B and opens to the outer peripheral surface 18B.

As shown in FIG. 1, the spool valve 10 is inserted deep into the insertion hole 102 with the end plug 18 positioned on the open end 102A side.

When the spool valve 10 is repaired or replaced, the work of extracting the spool valve 10 from the insertion hole 102 is carried out as shown in FIGS. The tip side of a flattened plate-shaped tool 120 is inserted into the insertion hole 102 from the open end 102A, and the outwardly extending portion (engaged portion) 120B is positioned in the radial direction slit 50B through the axial direction slit 50A. In this state, that is, in the insertion hole 102, the tool 120 is rotated 90 degrees around the longitudinal axis, and the tool 120 is pulled out from the insertion hole 102 while the outwardly extending portion 120B is hooked on the hook-shaped portion 50. The valve 10 is drawn out of the insertion hole 102 from the open end 102A of the insertion hole 102 by being pulled by the tool 120 .

That is, the method for extracting the spool valve 10 according to the present embodiment includes the steps of inserting the tool 120 into the insertion hole 102 from the open end 102A of the insertion hole 102, and rotating the tool 120 in the insertion hole 102 to extend outward. a step of engaging the protruding portion 120B with the hook-shaped portion 50 of the spool valve 10; and extracting the spool valve 10 out of the insertion hole 102 from 102A.

Since the spool valve 10 has the hook-shaped portion 50 in this manner, the spool valve 10 can be pulled out from the insertion hole 102 with good workability using the tool 120 that engages with the hook-shaped portion 50 . . Thereby, even if the insertion hole 102 is a bottomed hole, the spool valve 10 can be taken out from the insertion hole 102 .

Another embodiment of the spool valve according to the invention will now be described with reference to FIG.

In this embodiment, the end plug 18 is formed with a female threaded hole 52 extending in the axial direction of the end plug 18 and opening to the outer end surface 18A as an engaging portion for pulling out the spool valve 10 from the insertion hole 102. .

In this embodiment as well, the spool valve 10 is inserted deep into the insertion hole 102 with the end plug 18 positioned on the open end 102A side.

When repairing or replacing the spool valve 10, the operation of extracting the spool valve 10 from the insertion hole 102 is performed by inserting the tip side of a tool 130 having a male screw portion (engaged portion) 130B at the tip of the shank portion 130A from the open end 102A. Male threaded portion 130B is threadedly engaged with female threaded hole 52 by inserting into hole 102 and rotating tool 130 about its longitudinal axis. By pulling out the tool 130 from the insertion hole 102 in this state, the spool valve 10 is drawn out of the insertion hole 102 through the open end 102A of the insertion hole 102 so as to be pulled by the tool 130 .

Since the spool valve 10 has the female threaded hole 52 in this manner, the spool valve 10 can be easily removed from the insertion hole 102 using the tool 130 having the male threaded portion (engaged portion) 130B that is threadedly engaged with the female threaded hole 52 . You will be able to pull it out well. Thereby, even if the insertion hole 102 is a bottomed hole, the spool valve 10 can be taken out from the insertion hole 102 .

Another embodiment of the spool valve according to the invention will now be described with reference to FIG.

In this embodiment, the end plug 18 is formed with a male threaded shaft 54 extending axially from the outer end surface 18A of the end plug 18 as an engaging portion for pulling out the spool valve 10 from the insertion hole 102 .

In this embodiment as well, the spool valve 10 is inserted deep into the insertion hole 102 with the end plug 18 positioned on the open end 102A side.

When repairing or replacing the spool valve 10, the operation of extracting the spool valve 10 from the insertion hole 102 is performed by inserting the tip side of the tool 140 having the female thread portion 140B at the tip of the shank portion 140A into the insertion hole 102 from the open end 102A, The female threaded portion 140B is threadedly engaged with the male threaded shaft 54 by rotating the tool 140 about its longitudinal axis. By pulling out the tool 140 from the insertion hole 102 in this state, the spool valve 10 is drawn out of the insertion hole 102 through the open end 102A of the insertion hole 102 so as to be pulled by the tool 140 .
pulled out.

Since the spool valve 10 has the male threaded shaft 54 in this manner, the spool valve 10 can be extracted from the insertion hole 102 with good workability using the tool 140 having the female threaded portion 140B that is threadedly engaged with the male threaded shaft 54 . become. Thereby, even if the insertion hole 102 is a bottomed hole, the spool valve 10 can be taken out from the insertion hole 102 .

Although the present invention has been described in terms of its preferred embodiments, it should be readily apparent to those skilled in the art that the present invention is not limited to such embodiments and that departures from the spirit of the invention are not intended to be construed as limiting the scope of the invention. It can be changed appropriately as long as it does not occur. The hook-shaped portion 50 may have any shape, such as an L-shape, a radial through hole, or the like, so long as a tool having a hook portion can be hooked to extract the spool valve 10 from the insertion hole 102 . Further, all of the components shown in the above embodiments are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

10: Spool valve 12: Housing body 14: Spring pin 16: Spring pin 18: End plug (stopper)
18A: outer end surface 18B: outer peripheral surface 19: stopper surface 20: end plug (stopper)
21: Stopper surface 22: Valve housing 24: Valve element 24A: End surface 24B: End surface 25: Switching port 26: Switching port 28: Switching port 30: Pilot port 32: Pilot port 34: Land portion 36: Land portion 40: Pilot chamber 42: Pilot chamber 44: O-ring 46: O-ring 48: O-ring 50: Hook-shaped portion (engaging portion)
50A: axial slit 50B: radial slit 52: female screw hole (engagement portion)
54: male screw shaft (engagement part)
Reference Signs List 100: Valve holder 100A: Outer surface 102: Insertion hole 102A: Open end 104: Passage 106: External connection port 120: Tool 120A: Shank portion 120B: Outwardly extending portion (engaged portion)
130: Tool 130A: Shank portion 130B: Male screw portion (engaged portion)
140: Tool 140A: Shank portion 140B: Internal thread portion (engaged portion)

Claims (2)

A spool valve having a valve housing and a valve body provided in the valve housing is inserted from an insertion hole of a valve retainer into a T - shaped covering by a shank portion and an outwardly extending portion provided at the tip of the shank portion. A spool valve having a structure for pulling out with a tool having an engaging portion ,
in the axially outer end of the valve housing an axial slit for inserting the tip of the tool and in the axial slit to cooperate with the axial slit to form a T-shaped hook; A radial direction that communicates with the valve housing and opens to the outer peripheral surface of the valve housing, and enters such that the outwardly extending portion forming the engaged portion of the tool is caught by rotation of the shank portion of the tool about the axis. A spool valve provided with a slit. A method for extracting the spool valve according to claim 1 from a bottomed insertion hole formed in a valve retainer, comprising:
a step of inserting the tool having a T-shaped engaged portion formed by a shank portion and an outwardly extending portion provided at the tip of the shank portion into the insertion hole from the opening end of the insertion hole;
The tool is rotated around the axis of the shank portion in the insertion hole, and the outwardly extending portion forming the engaged portion enters the radial slit so that the engaged portion is caught by the spool valve. and
With the outwardly extending portion forming the engaged portion entering the radial slit, the tool is pulled out from the insertion hole, and the spool valve is pulled out of the insertion hole from the open end of the insertion hole. A method for extracting a spool valve, comprising the steps of:

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