JP2019218979A - Spool valve, valve assembly and method for extracting spool valve - Google Patents

Abstract

To remove a spool valve from an insertion hole even when the insertion hole formed in a valve holding body is a bottomed hole.SOLUTION: A spool valve 10 has a valve element 24 in a valve housing 22 and is inserted into an insertion hole 102 that is formed in a valve holding body 100. The spool valve 10 includes a hook-shaped part 50 serving as an engagement part that is used for pulling out the spool valve from the insertion hole 102, in an end part of the valve housing 22.SELECTED DRAWING: Figure 2

Description

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

  2. Description of the Related Art As a spool valve, there is known a spool valve which is entirely incorporated in a valve holder such as a manifold having a fluid passage formed therein (for example, Patent Document 1).

  During maintenance, the spool valve may be removed from the valve holder. When the spool valve is inserted into the insertion hole formed in the valve holder, an operation of pulling out the spool valve from the insertion hole is required for maintenance and 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 screw rod into the insertion hole from one opening of the insertion hole. Reference 2).

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

  However, when the insertion hole is a bottomed hole with one end opening, the spool valve cannot be pushed out of the insertion hole by the rod-shaped member or the screw rod.

  The problem to be solved by the present invention is to enable the spool valve to be taken out of the insertion hole even if the insertion hole formed in the valve holder 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 holder (100). 10), an engagement portion (50, 52, 54) for pulling out the spool valve (10) from the insertion hole (102) at an end of the valve housing (22).

  According to this configuration, the spool valve (10) can be pulled out of the insertion hole (102) using the tool (120, 130, 140) that engages with the engagement portion (50, 52, 54).

  In the above spool valve, preferably, the engagement portion includes a hook-shaped portion (50).

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

  In the above-mentioned spool valve, preferably, the engagement portion includes a female screw hole (52) or a male screw shaft (54).

  According to this configuration, the spool valve (10) can be pulled out of the insertion hole (102) by using the tools (130, 140) that are screw-engaged with the female screw hole (52) or the male screw shaft (54).

  A valve assembly according to one embodiment of the present invention includes a spool valve (10) having a valve housing (22) and a valve body (24) provided within the valve housing (22), and the spool valve (10). And a valve holder (100) having a bottomed insertion hole (102) into which the spool valve (10) is inserted. The spool valve (10) is provided at an end of the valve housing (22). Has an engaging portion (50, 52, 54) for pulling out from the insertion hole (102).

  According to this configuration, the spool valve (10) can be extracted from the bottomed insertion hole (102) by using the tool (120, 130, 140) that engages with the engagement portion (50, 52, 54). .

  A method of extracting a spool valve according to one embodiment of the present invention is a method of extracting a spool valve (10) according to the above-described embodiment from a bottomed insertion hole (102) formed in a valve holder (100). A tool (120, 130, 140) having an engaged part (120B, 130B, 140B) at the tip end capable of engaging with the engaging part (50, 52, 54) is opened at the open end of the insertion hole (102). (102A) inserting into the insertion hole (102) from the insertion hole (102), and rotating the tool (120, 130, 140) in the insertion hole (102) to rotate the engaged portion (120B, 130B, 140B). Is engaged with the engaging portions (50, 52, 54), and in a state where the engaging portions (50, 52, 54) are engaged with the engaged portions (120B, 130B, 140B). Tools (120 The 130, 140) and a step of extracting the insertion hole (102) outside said spool valve (10) from said open end (102A) of said insertion hole is pulled out from the insertion hole (102) (102).

  According to this extracting method, the spool valve (10) can be taken out from the bottomed insertion hole (102).

  ADVANTAGE OF THE INVENTION According to the spool valve by this invention, even if it is a hole with a bottom from an insertion hole formed in the valve holding body, a spool valve can be taken out from an insertion hole.

Sectional view showing a state in which the spool valve according to the present embodiment is incorporated in a valve holder. Perspective view of a spool valve according to the present embodiment; Sectional view of the spool valve according to the present embodiment Perspective view of a spool valve according to another embodiment Perspective view of a spool valve according to another embodiment

  Hereinafter, one embodiment of a spool valve according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the valve holder 100 includes an insertion hole (round hole) 102 into which a cylindrical (cylindrical) spool valve 10 is inserted, and each port (a switching port to be described later) of the spool valve 10. 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 is opened on 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. 3, a cylindrical housing body 12 and end plugs (see FIG. 3) fixed to both ends of the housing body 12 by spring pins 14 and 16, respectively. The valve housing 22 includes stoppers 18 and 20 and a valve body 24 provided in the valve housing 22 so as to be movable in the axial direction.

  Three switching ports 25, 26, 28 and two pilot ports 30, 32 are formed in the housing body 12. The valve body 24 has two land portions 34 and 36, and one end surface 24 </ b> A is in a first switching position where it contacts the stopper surface 19 at the end of the end plug 18, and the other end surface 24 </ b> B is It is possible to reciprocate between a second switching position abutting the stopper surface 21 at the tip. The valve housing 22 defines pilot chambers 40 and 42 between the valve body 24 and the end plug 18 and between the valve body 24 and the 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 located at the first switching position as shown in FIG. The communication between the switching ports 26 and 25 is established by interrupting the communication between the switching ports 26 and 28. When air pressure equal to or more than a predetermined value is supplied from the pilot port 30 to the pilot chamber 40, the valve body 24 is located at the second switching position and cuts off the communication between the switching ports 26 and 25 to switch the switching ports 26 and 28. Establish communication with

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

  At the outer end in the axial direction of the end plug 18, that is, at one end of the valve housing 22, as shown in FIGS. 1 to 3, an engagement portion for pulling out the spool valve 10 from the insertion hole 102 is provided. A hook-shaped portion 50 is formed.

  The hook-shaped portion 50 extends in the axial direction of the end plug 18 and opens in the outer end surface 18A and the outer peripheral surface 18B to form an axial slit 50A and a radially extending end plug 18 in the axial slit 50A. A T-shape is formed by the radial slits 50B which are communicated with each other and are opened on the outer peripheral surface 18B.

  As shown in FIG. 1, the spool valve 10 is inserted to the inside of the insertion hole 102 with the end plug 18 positioned at the opening end 102 </ b> A side.

  When the spool valve 10 is repaired or replaced, the operation of extracting the spool valve 10 from the insertion hole 102 is, as shown in FIGS. 1 and 2, a T-shape having an outwardly extending portion 120B at the tip of a shank portion 120A. The distal end side of the 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 slit 50B through the axial slit 50A. In this state, that is, by rotating the tool 120 around the longitudinal axis in the insertion hole 102 by 90 degrees, and pulling the tool 120 out of the insertion hole 102 with the outwardly extending portion 120B hooked on the hook-shaped portion 50, the spool The valve 10 is pulled out of the insertion hole 102 from the opening end 102A of the insertion hole 102 so as to be pulled by the tool 120.

  That is, the method of extracting the spool valve 10 according to the present embodiment includes a step of inserting the tool 120 into the insertion hole 102 from the opening end 102A of the insertion hole 102, and a step of rotating the tool 120 in the insertion hole 102 to extend outward. A step of engaging the projection 120B with the hook 50 of the spool valve 10; and pulling out the tool 120 from the insertion hole 102 with the hook 50 engaged with the outwardly extending portion 120B. Withdrawing the spool valve 10 out of the insertion hole 102 from the insertion hole 102A.

  As described above, since the hook-shaped portion 50 is provided on the spool valve 10, the spool valve 10 can be extracted from the insertion hole 102 with good workability by using the tool 120 that hooks and 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.

  Next, another embodiment of the spool valve according to the present invention will be described with reference to FIG.

  In the present embodiment, a female screw hole 52 that extends in the axial direction of the end plug 18 and opens in the outer end surface 18A is formed in the end plug 18 as an engagement portion for pulling out the spool valve 10 from the insertion hole 102. .

  Also in this embodiment, the spool valve 10 is inserted up to the inside of the insertion hole 102 with the end plug 18 positioned on the side of the opening end 102A.

  When the spool valve 10 is repaired or replaced, the operation of pulling out the spool valve 10 from the insertion hole 102 is performed by inserting the distal end side of the tool 130 having the male screw portion (engaged portion) 130B at the distal end of the shank portion 130A from the open end 102A. The male screw portion 130B is threadedly engaged with the female screw hole 52 by inserting the tool 130 into the hole 102 and rotating the tool 130 about the longitudinal axis. By pulling out the tool 130 from the insertion hole 102 in this state, the spool valve 10 is pulled out of the insertion hole 102 from the opening end 102A of the insertion hole 102 so as to be pulled by the tool 130.

  As described above, since the spool valve 10 has the female screw hole 52, the spool valve 10 can be removed from the insertion hole 102 by using the tool 130 having the male screw portion (engaged portion) 130 </ b> B that is screw-engaged with the female screw hole 52. You will be able to extract 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.

  Next, another embodiment of the spool valve according to the present invention will be described with reference to FIG.

  In the present embodiment, a male screw shaft 54 extending in the axial direction from the outer end surface 18A of the end plug 18 is formed on the end plug 18 as an engagement portion for pulling out the spool valve 10 from the insertion hole 102.

  Also in this embodiment, the spool valve 10 is inserted up to the inside of the insertion hole 102 with the end plug 18 positioned on the side of the opening end 102A.

When the spool valve 10 is repaired or replaced, the operation of extracting the spool valve 10 from the insertion hole 102 is performed by inserting the distal end side of a tool 140 having a female screw portion 140B at the distal end of the shank portion 140A into the insertion hole 102 from the open end 102A. By rotating the tool 140 about the longitudinal axis, the female screw portion 140B is threadedly engaged with the male screw shaft 54. By pulling out the tool 140 from the insertion hole 102 in this state, the spool valve 10 is pulled out of the insertion hole 102 from the opening end 102A of the insertion hole 102 so as to be pulled by the tool 140.
It is extracted.

  As described above, since the male threaded shaft 54 is provided on the spool valve 10, the spool valve 10 can be extracted from the insertion hole 102 with good workability by using the tool 140 having the female threaded part 140 </ b> B that is threadedly engaged with the male threaded shaft 54. Become like Thereby, even if the insertion hole 102 is a bottomed hole, the spool valve 10 can be taken out from the insertion hole 102.

  As described above, the present invention has been described with respect to the preferred embodiments. However, as will be easily understood by those skilled in the art, the present invention is not limited to such embodiments, and departs from the spirit of the present invention. It can be changed appropriately within a range not to be performed. The hook-shaped portion 50 may have any shape such as an L-shape, a radial through hole, or the like, so that a tool having a hook portion can be hooked and the spool valve 10 can be pulled out from the insertion hole 102. Further, all of the constituent elements shown in the above embodiment 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 body 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 part (engaging part)
50A: axial slit 50B: radial slit 52: female screw hole (engaging portion)
54: Male screw shaft (engagement part)
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 130B: Male thread (engaged part)
140: Tool 140A: Shank 140B: Female thread (engaged part)

Claims (5)

A spool valve having a valve housing and a valve body provided in the valve housing, the spool valve being inserted into an insertion hole formed in a valve holder,
A spool valve having an engagement portion at an end of the valve housing for pulling out the spool valve from the insertion hole.   The spool valve according to claim 1, wherein the engagement portion includes a hook-shaped portion.   The spool valve according to claim 1, wherein the engagement portion includes a female screw hole or a male screw shaft. A spool valve having a valve housing and a valve element provided in the valve housing;
A valve holder having a bottomed insertion hole into which the spool valve is inserted,
A valve assembly, wherein the spool valve has an engagement portion at an end of the valve housing for pulling out the spool valve from the insertion hole. A method of extracting the spool valve according to any one of claims 1 to 3 from a bottomed insertion hole formed in a valve holding body,
A step of inserting a tool having an engaged portion engageable with the engaging portion at the tip from the opening end of the insertion hole into the insertion hole,
Rotating the tool in the insertion hole to engage the engaged portion with the engaging portion;
Withdrawing the tool from the insertion hole in a state where the engagement portion is engaged with the engaged portion, and extracting the spool valve from the opening end of the insertion hole to the outside of the insertion hole. Extraction method.

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