JP5823071B1 - Gate valve - Google Patents

Abstract

A gate valve that can be reduced in size by reducing the width of a housing box is provided. A gate valve is provided between a pair of side plates and a valve body driving body having a pair of side plates arranged in parallel in the opening and closing direction of the gate valve by the valve body, and is fixed to a valve rod. It consists of a valve body drive mechanism part provided with an operating body, formed so that the valve body driving body and the L operating body are driven in the vertical direction by a drive source, and between each of the pair of side plates and the L operating body, By converting the vertical driving force of the valve body driving body into the side-by-side direction, an operating mechanism for operating the L operating bodies in the juxtaposed direction is mounted. Then, when the valve body driving body and the L operation body are driven in the vertical direction by the drive source, and the vertical movement of the valve body driving body is stopped by the locking body that stops the vertical movement of the valve body driving body, The operating mechanism moves the L operating body in the direction of the pair of side plates in the valve body driving body. [Selection] Figure 1

Description

  The present invention relates to a gate valve.

  Conventionally, gate valves have been used to maintain a vacuum chamber in a semiconductor manufacturing apparatus or the like in a vacuum state, and gate valves having various configurations have been proposed.

  For example, Patent Document 1 discloses a valve body that is in close contact with a valve seat formed around the opening from the valve box and closes the opening from the inside, and is connected to the valve body. A valve stem that protrudes and moves horizontally and moves in a horizontal direction while maintaining confidentiality, and is connected to the outside of the valve box, and is formed above and below the upper and lower drive section homes. A housing box in which L motion block guide homes are formed on the inner surfaces of both sides, which are formed by open / close drive section homes that are continuously formed horizontally in the closing direction (gate valve opening / closing direction), and a valve stem The L motion block is provided with guide rollers that are inserted into the L motion block guide home and driven on both side surfaces. And a drive block connected to the lower side via a plurality of links, one or more tension elastic means provided between the L motion block and the drive block, and a vertical drive for driving the drive block up and down A gate valve comprising means is described.

International Publication No. 2013/151403

  However, in the gate valve described in Patent Document 1, the drive block and the L motion block are provided in the gate valve opening / closing direction, and the housing box accommodates them. The outer surface width needs to be larger than the width of the drive block and the L motion block, which is larger than the outer surface width of the valve box, and there is a problem that the entire width of the gate valve is increased.

  An object of the present invention is to provide a gate valve that can be miniaturized by making the outer surface width of the housing box equal to or less than the outer surface width of the valve box in the opening and closing direction of the gate valve by the valve body. .

The gate valve of the present invention includes a valve body disposed to face a valve seat having an opening, a valve rod provided in the valve body, a valve body drive mechanism unit that drives the valve body through the valve rod, In a gate valve with
The valve body drive mechanism section includes a valve body drive body that is driven in the vertical direction, and an L operation body that is driven in the vertical direction and the opening / closing direction of the gate valve, and the valve body drive bodies are disposed on both sides of the valve rod. The side plates are arranged side by side so as to have an arrangement direction directed toward the opening and closing direction of the gate valve, and the L operating body is provided between the valve stem and the inside of the side plate, Fixed to the rod, a space is formed between the side plate and the L action body,
The valve body drive body and the L operation body are driven in the vertical direction by the driving force from the valve body drive mechanism , the L operation body is stopped in the vertical direction by the locking body,
In the space portion, an operating mechanism is provided for operating the L operating body in the opening and closing direction of the gate valve by the driving force from the valve body driving mechanism.
When the L operating body is stopped from moving up and down, the driving force from the valve body driving mechanism portion causes the L operating body to move in the gate valve opening / closing direction between the valve rod and the inner side of the side plate via the operating mechanism. It is characterized by operating.

In the gate valve of the present invention, the valve body driving body includes a bottom plate between the side plates disposed on both sides of the valve rod, and an elastic body is provided between the upper surface of the bottom plate and the lower surface of the L operation body. It is a feature.

  The gate valve of the present invention is characterized in that the housing box houses the valve body drive mechanism and the operating mechanism, and the locking part is provided on the inner side surface of the housing box.

  In the gate valve of the present invention, the operation mechanism includes a link mechanism including a pin portion provided in the L operation body, a pin portion provided in the valve body driving body, and a connection portion rotatably connected to each pin portion. It is characterized by consisting of.

  The gate valve of the present invention is characterized in that the locking portion is formed of a roller portion, and the roller portion is slidably contacted with the L operation body.

  In the gate valve of the present invention, the housing box includes a groove portion extending in the vertical direction on the side surface, the valve element driving body includes a guide roller portion on the outer side surface, and the guide roller portion is disposed in the groove portion of the housing box. The valve body driving body is slidable in the vertical direction along the groove portion of the housing box via the guide roller portion.

The gate valve of the present invention is also provided with a valve body disposed opposite to a valve seat having an opening, a valve rod provided on the valve body, and a valve body drive mechanism unit that drives the valve body via the valve rod. A gate valve configured to include: a gate valve driving unit configured of: a housing box that accommodates the gate valve driving unit; and a valve box mounted on the housing box.
The gate valve drive unit includes a valve body drive body in which the valve body drive mechanism unit is driven in the vertical direction, and an L operation body that is driven in the vertical direction and in the opening / closing direction of the gate valve. Side plates disposed on both sides of the rod, the side plates are arranged side by side so as to have an arrangement direction toward the opening and closing direction of the gate valve, and the L operating body is disposed between the valve rod and the inside of the side plate. And is fixed to the valve stem, and a space is formed between the side plate and the L operation body,
The valve body drive body and the L operation body are driven in the vertical direction by the driving force from the valve body drive mechanism , the L operation body is stopped in the vertical direction by the locking body,
In the space portion, an operating mechanism is provided for operating the L operating body in the opening / closing direction of the gate valve between the valve rod inside the side plate by the driving force from the valve body driving mechanism section,
The gate valve driving unit, is characterized in that the outer surface width of the housing box in the closing direction of the gate valve is retract and to the housing box is the same or less relative to the outer surface width of the valve body.

  Since the gate valve of the present invention is configured as described above, the gate valve is placed in the housing box in which the outer surface width of the housing box is equal to or less than the outer surface width of the valve box in the opening and closing direction of the gate valve by the valve body. By accommodating the drive unit, the width of the housing box can be reduced, and a gate valve that can be reduced in size can be provided.

It is a schematic perspective view which shows the structure of the gate valve of the Example of this invention. It is a figure which shows the structure of the valve body drive mechanism part of the gate valve of the Example of this invention. It is a figure which decomposes | disassembles and shows the valve body drive mechanism part of FIG. It is a figure which shows operation | movement of the gate valve of the Example of this invention. It is a figure which shows operation | movement of the gate valve of the Example of this invention. It is a figure which shows operation | movement of the gate valve of the Example of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  A gate valve of an embodiment of the present invention (hereinafter referred to as the present embodiment) will be described below with reference to FIG.

  FIG. 1 is a schematic perspective view showing a configuration of a gate valve according to an embodiment of the present invention. In order to show the internal configuration of FIG. 1, a part thereof is shown as a cross-sectional view. FIG. 1 is a front view of the gate valve.

  In the gate valve 100 of the present embodiment, the valve body 10 is disposed so as to face the valve seat 210 in the valve box 200, the valve body 10 is driven by the driving force from the drive source 50, and the sealing material 12 is The gas passing through the opening 212 of the valve seat 210 is sealed by being pressed by the seat 210 and being in a crushed state. The valve body 10 moves in the direction M shown in FIG. Hereinafter, the direction in which the valve body 10 moves is referred to as an opening / closing direction M of the gate valve.

  The gate valve 100 of the present embodiment includes the above-described valve body 10, a valve rod 20 provided on the valve body 10, and a valve body drive mechanism 1 that drives the valve body via the valve rod 20.

  Further, the valve body drive mechanism 1 includes a valve body drive body 60 including a pair of side plates 61 and 62 arranged in parallel in the opening / closing direction M of the gate valve 100 by the valve body 10, and a pair of side plates 61 and 62. And an L operating body 30 fixed to the valve stem 20, the valve body driving body 60 and the L operating body 30 are formed to be driven in the vertical direction by the drive source 50, and a pair of side plates 61, 62 and an L operating body 30 are each equipped with an operating mechanism 70 that operates the L operating body in the juxtaposed direction by converting the vertical driving force of the valve body driving body 60 into the juxtaposed direction. Is done.

  Then, the valve body driving body 60 and the L operation body 30 are driven in the vertical direction by the drive source 50, and the vertical operation of the L operation body 30 is stopped by the locking body 80 that stops the vertical operation of the L operation body 30. The operating mechanism 70 moves the L operating body 30 in the pair of side plate directions M within the valve body driving body 60.

  With the above configuration, the gate valve 100 of the present embodiment is driven like an inverted L-shape as shown in the driving direction of the valve body in FIG. Hereinafter, the operation of the valve body 10 is referred to as L operation.

  Next, the detailed configuration of the gate valve 100 of this embodiment will be described below.

  A sealing material 212 such as an O-ring is attached to the valve body 10 that is disposed to face the valve seat 210 having the opening 212. The valve body 10 is connected to the valve stem 20 via a valve body support portion 14 that supports the valve body 10.

  As shown in the figure, the valve body 10 is an elongated rectangular flat plate block extending in the longitudinal direction. The valve body 10 may have another shape as long as it is applicable to the gate valve.

  For example, an L-shaped block is used for the valve body support portion 14 as shown in the figure, and a hole 16 for inserting a coupling member such as a screw (not shown) for connection to the valve body 10 is formed. The valve body 10 and the valve body support portion 14 are connected to each other by a coupling member from the back surface 18 side of the valve body 10 through the hole 16.

  The valve rod 20 is a round bar-shaped member, and one end thereof is connected to the valve body support portion 14. It is good also as a structure connected to the valve body 10 directly. Further, the other end side of the valve rod 20 is inserted into a through-hole 53 provided on the lid 90 described later, the groove 32 of the L operating body 30, the valve body driving body 60 and the driving source 50. The valve stem 20 serves as a drive shaft for driving the valve body 10 by the driving force from the drive source 50. The shape of the valve stem 20 may be another shape as long as it can be applied as a drive shaft to the valve body 10.

  The upper ends of the valve body 10, the valve body support portion 14, and the valve stem 20 are accommodated in a housing-like valve box 200 having a hollow inside. The valve box 200 is provided with a valve seat 210 that is a portion to which the sealing material 212 of the valve body 10 is pressed, and each of the valve seats 210 is provided with an opening 212.

  The lid 90 is connected to the bottom of the valve box 200. A hole 94 for inserting a coupling member such as a screw (not shown) for connection to the bottom of the valve box 200 is formed in the lid 90, and the valve box 200 is inserted through the hole 94 by the coupling member. The bottom and the lid 90 are connected. The valve box 200 and the lid 90 form an integral box.

  In addition, a through hole 92 is formed in the lid 90, and the valve rod 20 penetrates the through hole 92 so that the valve rod 20 can be moved up and down in the valve box 200. Here, the size of the hole of the through hole 92 is a shape that extends in the gate valve opening / closing direction M so that the valve body 10 can perform an L operation. For example, an elliptical shape is used, but it may be circular as long as the valve stem 20 can move in the horizontal direction.

  Moreover, the upper part of the housing box 40 mentioned later is connected to the cover body 90. FIG. The lid 90 and the housing box 40 form an integral box. Thus, the lid 90 has two functions of the bottom lid of the valve box 200 and the upper lid of the housing box 40.

  Further, the bellows 22 is connected so as to cover the lower portion of the through-hole 92 of the lid 90 and the valve rod 20 inserted through the through-hole 92, whereby the gas in the housing box 40 is caused to flow into the valve box 200. It is prevented from leaking inside.

  The housing box 40 accommodates the valve body drive mechanism 1 which will be described later in detail. A drive source 50 is connected to the lower part of the housing box 40. A locking portion 80 is provided on the inner side surface of the housing box 40. The locking portion 80 protrudes toward the inside of the housing box 40, and locks the L motion body 30 so as to come into contact with the L motion body 30 when the L motion body 30 is lifted and to prevent the upward movement.

  Further, the locking portion 80 is formed with a roller portion 82 and a shaft portion 84, and the shaft portion 84 is fixed to the inner side surface of the housing box 40. The roller portion 82 is attached to the shaft portion 84 so as to be rotatable about the shaft portion 84 as a central axis.

  As a result, when the L operation body 30 is raised, the roller portion 82 comes into contact with the L operation body 30 so as to seal the upward movement of the L operation body 30, and the roller portion 82 further locks the shaft portion 84. By rotating about the central axis, the L operating body 30 slides and moves with the roller portion 82 in the opening / closing direction of the gate valve. By doing in this way, the movement of the L operation body 30 in the opening / closing direction of the gate valve can be made smooth.

  Further, the housing box 40 is formed with a groove 42 extending in the vertical direction on each side surface. For example, as shown in FIG. 1, it is formed in an elliptical shape extending in the vertical direction. This groove portion 42 is provided with a guide roller portion 5 provided in a valve body driving body 60 to be described later, so that the valve body driving body 60 can slide up and down along the groove portion 42 of the housing via the guide roller portion 5. It is composed. Details will be described later.

  The drive source 50 includes a block body 51, and a pair of cylinders 52 and piston rods 64 are provided in the block body 51. The block body 51 is formed with a hole 53 for inserting the other end of the valve rod 20, a pair of hollow portions 59 for housing the cylinder 52, and a pair of holes 67 for inserting the piston rod 64. ing. The block body 51 is provided with an inflow valve 58 for allowing air to flow into the cylinder 52 on the outer surface. Further, the upper ends of the pair of piston rods 64 support the valve body driving body 60. The space body 2 is formed by the block body 51, the above-described lid body 90, and the housing box 40.

  As a result, the drive source 50 causes the compressed air to flow into the cylinder 52 via the inflow valve 58, generates a driving force that raises the piston rod 64 by the compressed air, and the valve body driver via the piston rod 64. The driving force is transmitted to 60, and the valve body driving body 60 is moved upward. The drive source 50 may use a servo motor and an electric actuator that generates a drive force by converting a rotational force from the servo motor into a linear motion.

  FIG. 2 is a diagram illustrating the configuration of the valve body drive mechanism of the gate valve 100 according to the embodiment of the present invention. FIG. 3 is an exploded view of the valve body drive mechanism of FIG. 2 and 3 are views of the gate valve as viewed from the back with respect to FIG. Hereinafter, the configuration of the valve body drive mechanism 1 will be described in detail.

  The valve body driving body 60 includes a pair of side plates 61 and 62 arranged in parallel in the opening / closing direction M of the gate valve by the valve body. In the present embodiment, a bottom plate 65 is provided between the pair of side plates 61 and 62, and a through hole 69 into which the valve rod 20 is inserted is formed in the bottom plate 65. An elastic body 85 is provided between the upper surface of the bottom plate 65 and the lower surface of the L operation body 30. Further, a groove 68 for accommodating the lower portion of the elastic body 85 is formed on the upper surface of the bottom plate 65.

  Thereby, when the valve body driving body 60 is raised, the L operation body 30 is also raised via the elastic body 85. Since the L operation body 30 supports and fixes the valve rod 20, the valve body 10 is also moved upward as the L operation body 30 moves upward. In this way, the valve body driving body 60 and the L operation body 30 are formed to be driven in the vertical direction by the driving source 50.

  Further, the pair of side plates 61 and 62 are provided with holes 63 at two upper and lower portions, respectively, and pin members 76 are inserted into these holes and connected to a connecting member 72 described later. Further, through holes 66 for inserting a shaft portion 6 of the guide roller portion 5 to be described later are formed on the pair of side plates 61 and 62 at two locations, upper and lower, respectively.

  Further, the valve body driving body 60 includes a guide roller portion 5 on the outer side surface. The guide roller portion 5 is rotatably fixed to the shaft portion 6 and is provided in the groove portion 42 of the housing. The shaft portion 6 is inserted into the through hole 66 and fixed to the valve body driving body 60.

  Thereby, the guide roller portion 5 can move up and down in the groove portion 42 while rotating as the valve body driving body 60 moves upward, but the movement of the gate valve in the opening and closing direction is locked by the groove portion 42. The Accordingly, the movement of the valve body driving body 60 in the opening / closing direction of the gate valve is also restricted by the guide roller portion 5 being locked.

  The L operation body 30 is provided between the pair of side plates 61 and 62. The L operating body 30 is configured to support the valve rod 20 and to form a groove 32 for closely contacting the bellows 22, whereby the valve rod 20 is supported by the L operating body 30.

  Further, in this embodiment, the L operation body 30 is formed with side plates 35 and 36 extending in a direction perpendicular to the plate pressure direction at the ends of the pair of side plates.

  The operation mechanism 70 is provided between the pair of side plates 61 and 62, and thus the operation mechanism 70 is provided between the pair of side plates 61 and 62 and the L operation body 30. In the present embodiment, the operation mechanism 70 is rotatably connected to a pair of pin portions 74 provided on the side surface of the L operation body 30, the pin portion 76 provided on the valve body driving body 60 described above, and each pin portion 76. The connecting mechanism 72 includes a link mechanism.

  As described above, the operation mechanism 70 including the link mechanism is provided in the concave groove S between the pair of side plates 35 and 36 and the convex portion 34. Thus, by providing the operation mechanism 70 in the concave groove S, that is, by using the space portion of the concave groove S, the length of the lateral width of the valve body drive mechanism portion 1 can also be reduced.

  The connecting portion 72 is formed with holes 73 and 75 for connecting the pin portion 74 and the pin portion 76, respectively, and the connecting portion 72 is rotatable with respect to the respective pin portions 74 and 76. . With this configuration, the L operating body can be operated in the juxtaposed direction by converting the vertical driving force of the valve body drive body 60 into the juxtaposed direction. Here, the juxtaposed direction indicates a direction in which a pair of side plates 61 and 62 facing the valve body 10 are provided as shown in the figure.

  In the operating mechanism 70, when the L operating body 30 is locked by the locking body 80, the connecting portion 72 rotates and the L operating body 30 is pushed out in the juxtaposition direction by the rotation of the connecting portion 72. . Thereby, the valve body 10 connected to the L operation body 30 is also pushed out in the juxtaposition direction. In this way, the L operation body 30 is operated in the valve body driving body 60 in the direction of the pair of side plates. In this way, the vertical driving force of the valve body driving body 60 is converted into the side-by-side direction.

  4, 5 and 6 are diagrams showing the operation of the gate valve according to the embodiment of the present invention. FIG. 4 is a view showing a state in which the valve body driving body 60 and the L operation body 30 are raised, and FIG. 5 is a view showing a state in which the L operation body 30 is locked to the locking body 80. FIG. 6 is a diagram illustrating a state in which the L operation body moves in the opening / closing direction of the gate valve. 4 to 6 are partially shown in cross-sectional views for explanation.

  Next, operation | movement of the valve body drive mechanism part 1 is demonstrated.

  As shown in FIG. 4, the valve body driving body 60 and the L operation body 30 are driven in the vertical direction by the driving source. At this time, the elastic body 85 is not compressed and deformed, and the operating mechanism 70 is not changed. Here, the driving force of the valve body driving body 60 that moves upward is transmitted to the L operation body 30 via the elastic body 85. A distance d1 is maintained between the L operation body 30 and the housing box 40. The interior is the space 2 as described above.

  Next, as shown in FIG. 5, the L operation body 30 is locked by the locking body 80. At this time, the distance d1 is still maintained between the L operation body 30 and the housing box 40.

  As shown in FIG. 6, when the L operating body 30 is locked by the locking body 80, the operating mechanism 70 rotates in the direction of the arrow, and the link mechanism of the operating mechanism 70 rotates. The L operation body 30 is pushed out in the juxtaposed direction while sliding on the locking body 80. That is, the L operation body 30 moves in the juxtaposition direction. At this time, the elastic body 85 is compressed and deformed, and the lower portion of the elastic body 85 is accommodated in the groove portion 68 of the bottom plate 65 so that the upper portion of the elastic body 85 does not move in the juxtaposition direction of the L operation bodies 30. Displacement in the juxtaposition direction with movement.

  Thus, when the L operation body 30 is pushed out in the juxtaposed direction, the valve body 10 connected to the L action body 30 is also pushed out in the juxtaposition direction. In this way, the L operation body 30 is operated in the valve body driving body 60 in the direction of the pair of side plates. At this time, the distance between the L operating body 30 and the housing box 40 is a distance d2. Further, a gap d3 is generated between the valve body driving body 60 and the L operation body 30.

  Although not shown, the gate valve 100 of the present embodiment is not shown in the drawing, and when the valve body driving body 60 is lowered by the downward driving force from the piston rod 64, the L operating body 30 is the elastic body 85 that is compressed and deformed. It is moved downward by the spring load and returns to the original position before being pushed out in the juxtaposed direction, and then descends together with the valve body driving body 60. In this way, the valve body 10 is released from the valve seat 210 and the seal of the valve seat 210 is released.

  In the gate valve 100 of the present embodiment, the L operation by the valve body 10 is realized by the above configuration, and the valve seat 210 is sealed. As described above, the L operation of the valve body 10 can prevent the sealing material 12 from being sealed while being rubbed against the valve seat 210 as in the prior art, so that the consumption of the sealing material 12 can be reduced. Can do.

  Further, according to the above configuration, since the width of the valve body driving body 60 and the width of the L operating body 30 overlap, the L operating body 30 can be operated in the direction of the pair of side plates within the valve body driving body 60. As a result, the width of the housing box 40 can be reduced. By doing in this way, the outer surface width of the housing box 40 can be the same as or less than the outer surface width of the valve box in the opening / closing direction of the gate valve 100 by the valve body.

  According to the above configuration, since the L operating body 30 is provided between the side plates 61 and 62 of the valve body driving body 60, the width of the valve body driving body 60 and the width of the L operating body 30 overlap. The width of the housing box 40 for storing them can be reduced. Thereby, the outer surface width of the housing box 40 can be made equal to or less than the outer surface width of the valve box in the opening and closing direction of the gate valve 100 by the valve body, and the entire width of the gate valve 100 can be reduced. The gate valve 100 can be downsized.

  As described above, the gate valve according to the embodiment of the present invention also includes a valve body disposed to face the valve seat having the opening, a valve rod provided on the valve body, and the valve body via the valve rod. In a gate valve configured to include a gate valve driving unit configured to drive a valve body driving mechanism unit, a housing box that accommodates the gate valve driving unit, and a valve box mounted on the housing box, A valve body drive unit having a pair of side plates arranged in parallel in the opening / closing direction of the gate valve by the valve body, and an L operation body provided between the pair of side plates and fixed to the valve rod The valve body drive body and the L operation body are formed so as to be driven in the vertical direction by the drive source, and are formed so as to be operated in the direction of the pair of side plates in the valve body drive body from the L operation body, Between each of the pair of side plates and the L motion body An operating mechanism for operating the L operating body in the juxtaposed direction by converting the vertical driving force of the valve body driving body into the juxtaposed direction is mounted, and the outer surface width of the housing box in the opening / closing direction of the gate valve by the valve body is The gate valve drive unit is housed in the housing box which is the same as or less than the outer surface width of the valve box.

  In the gate valve of the embodiment of the present invention, the gate valve drive unit is housed in the housing box in which the outer surface width of the housing box is the same as or less than the outer surface width of the valve box in the opening and closing direction of the gate valve by the valve body. By doing so, the width | variety of a housing box can be made small and the gate valve which can be reduced in size can be provided.

  DESCRIPTION OF SYMBOLS 1 ... Valve body drive mechanism part, 5 ... Guide roller part, 10 ... Valve body, 20 ... Valve rod, 30 ... L action body, 40 ... Housing box, 50 ... Drive source, 60 ... Valve body drive body, 61, 62 DESCRIPTION OF SYMBOLS ... Side plate, 70 ... Operation | movement mechanism, 80 ... Locking body, 100 ... Gate valve, 200 ... Valve box, 210 ... Valve seat, 212 ... Opening part.

Claims (7)

In a gate valve comprising: a valve body disposed opposite to a valve seat having an opening; a valve rod provided on the valve body; and a valve body drive mechanism that drives the valve body via the valve rod.
The valve body drive mechanism section includes a valve body drive body that is driven in the vertical direction, and an L operation body that is driven in the vertical direction and the opening / closing direction of the gate valve, and the valve body drive bodies are disposed on both sides of the valve rod. The side plates are arranged side by side so as to have an arrangement direction directed toward the opening and closing direction of the gate valve, and the L operating body is provided between the valve stem and the inside of the side plate, Fixed to the rod, a space is formed between the side plate and the L action body,
The valve body drive body and the L operation body are driven in the vertical direction by the driving force from the valve body drive mechanism , the L operation body is stopped in the vertical direction by the locking body,
In the space portion, an operating mechanism is provided for operating the L operating body in the opening and closing direction of the gate valve by the driving force from the valve body driving mechanism.
When the L operating body is stopped from moving up and down, the driving force from the valve body driving mechanism portion causes the L operating body to move in the gate valve opening / closing direction between the valve rod and the inner side of the side plate via the operating mechanism. A gate valve characterized by operating. 2. The gate valve according to claim 1, wherein the valve body driving body includes a bottom plate between side plates disposed on both sides of the valve rod, and an elastic body is provided between the upper surface of the bottom plate and the lower surface of the L operation body. Characteristic gate valve. In the gate valve of claim 1 wherein, a gate valve housing boxes, and houses the operating mechanism and the valve body drive mechanism, the locking member, characterized in that provided on the side surface of the inner housing box.   2. The link mechanism according to claim 1, wherein the operating mechanism includes a pin portion provided in the L operating body, a pin portion provided in the valve body driving body, and a connecting portion rotatably connected to each pin portion. A gate valve characterized by comprising: In the gate valve of claim 1 wherein, a gate valve the locking member is formed by the roller portion, the roller portion, characterized in that it is slidably in contact with the L operation member.   2. The gate valve according to claim 1, wherein the housing box includes a groove portion extending in a vertical direction on a side surface, the valve element driving body includes a guide roller portion on an outer side surface, and the guide roller portion is disposed in the groove portion of the housing box. The gate valve is characterized in that the valve body driving body is slidable in the vertical direction along the groove portion of the housing box via the guide roller portion. A gate valve drive unit comprising a valve body disposed opposite to a valve seat having an opening, a valve rod provided on the valve body, and a valve body drive mechanism unit that drives the valve body via the valve rod And a gate box configured to include a housing box that accommodates the gate valve drive unit and a valve box that is mounted on the housing box,
The gate valve drive unit includes a valve body drive body in which the valve body drive mechanism unit is driven in the vertical direction, and an L operation body that is driven in the vertical direction and in the opening / closing direction of the gate valve. Side plates disposed on both sides of the rod, the side plates are arranged side by side so as to have an arrangement direction toward the opening and closing direction of the gate valve, and the L operating body is disposed between the valve rod and the inside of the side plate. And is fixed to the valve stem, and a space is formed between the side plate and the L operation body,
The valve body drive body and the L operation body are driven in the vertical direction by the driving force from the valve body drive mechanism , the L operation body is stopped in the vertical direction by the locking body,
In the space portion, an operating mechanism is provided for operating the L operating body in the opening / closing direction of the gate valve between the valve rod inside the side plate by the driving force from the valve body driving mechanism section,
Gate valve the gate valve driving unit, characterized in that the outer surface width of the housing box in the closing direction of the gate valve is retract and to the housing box is the same or less relative to the outer surface width of the valve body.

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