Patent Publication Number: US-2020292209-A1

Title: Fluid control device

Description:
TECHNICAL FIELD 
     The present invention relates to a fluid control device. 
     BACKGROUND ART 
     As a conventional fluid control device, for example, as disclosed in Patent Literature 1, there has been one including: a block-shaped body member having inside a flow path through which fluid flows and respective equipment installed on an installation surface of the body member to control the fluid flowing through the flow path. 
     In addition, the conventional fluid control device is structured to screw a heater for heating the body member to a side surface adjacent to the installation surface of the body member. 
     Meanwhile, this sort of fluid control device is generally installed together with other such fluid control devices. However, in this case, adjacent fluid control devices are arranged with side surfaces of body members approximated to each other. For this reason, a heater is positioned between the adjacent body members and consequently becomes difficult to access, and therefore it has been very troublesome to maintain the heater. 
     CITATION LIST 
     Patent Literatures 
     Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2016-119012 
     SUMMARY OF INVENTION 
     Technical Problem 
     Therefore, the main object of the present invention is to obtain a fluid control device that enables a heater arranged on a side surface of a body member to be easily detached and is superior in maintainability. 
     Solution to Problem 
     That is, the fluid control device according to the present invention is one including: a body member that is a block-shaped one having inside a flow path through which fluid flows and has an installation surface on which respective equipment for controlling the fluid flowing through the flow path is installed and a side surface adjacent to the installation surface; a heater that heats the body member; a heater holding member that has a facing surface facing the installation surface of the body member and holds the heater along the side surface with the facing surface made to face the installation surface; and a pressing mechanism that presses the facing surface toward the installation surface. 
     Since such a fluid control device is structured so that the heater holding member that is pressed by the pressing mechanism against the installation surface of the body member and thereby attached to the installation surface holds the heater along the side surface, the heater holding member can be detached from the installation surface side of the body member, which is relatively easily accessible even after integrated arrangement. This improves the maintainability of the heater. In addition, since the pressing mechanism presses the facing surface toward the installation surface, the positional displacement of the heater holding member with respect to the body member can be suppressed. 
     Also, the installation surface may be one including a first contact part that contacts with the facing surface, the facing surface may be one including a second contact part that contacts with the first contact part, and at least one of the first contact part and the second contact part may be one formed in a surface shape that is tilted with respect to a pressing direction of the pressing mechanism. 
     In addition, the first contact part and the second contact part may be ones constituting a slide mechanism that interposes between the installation surface and the facing surface, and the slide mechanism may be one that slides the heater holding member with respect to the body member with use of pressing by the pressing mechanism so that the heater moves toward the side surface. 
     In such a configuration, between the installation surface and the facing surface, the pressing by the pressing mechanism enables the heater holding member to be slid with respect to the body member so that the heater moves toward the side surface, and therefore the heater can be surely brought into close contact with the side surface of the body member. This allows the heat of the heater to be efficiently transferred to the body member. 
     As a specific configuration of the slide mechanism, it is only necessary that the slide mechanism is one including: the first contact part provided on the installation part; and the second contact part provided on the facing surface and brought into contact with the first contact part, and at least one of the first contact part and the second contact part is configured to be formed in a surface shape that is tilted with respect to the pressing direction of the pressing mechanism. Also, in this case, the first contact part and the second contact part may be ones configured to make a surface contact with each other. 
     In such a configuration, the slide mechanism capable of sliding the heater holding member with respect to the body member can be configured without using a complicated structure. 
     Also, specific configurations of the heater holding member include one in which the heater holding member is one including: an attachment part having the facing surface; and a heater holding part that extends from a facing surface side of the attachment part along the side surface, and the heater is provided on at least one of one surface of the heater holding part, which faces the side surface, and the other surface on the side opposite to the one surface. 
     Further, the one surface of the heater holding member may be one tilted from the facing surface toward the side surface. 
     In such a configuration, when the pressing mechanism presses the facing surface toward the installation surface, the close contact can be achieved with at least part of the heater holding part biased toward the side surface. 
     Also, specific configurations of the pressing mechanism include one in which the pressing mechanism is one including: a screw hole provided in the installation surface; a long hole that penetrates through the attachment part and extends in a direction away from the heater holding part; and a screw member that is screwed to the screw hole through the long hole. 
     The fluid control device configured as described enables the heater arranged on the side surface of the body member to be easily detached from the installation surface side even after integrated arrangement, thus improving maintainability. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an exploded perspective view schematically illustrating a fluid control device according to a first embodiment; 
         FIG. 2  is a cross-sectional view schematically illustrating a state where a body member of the fluid control device according to the first embodiment is cut in its longer direction; 
         FIG. 3  is an exploded cross-sectional view schematically illustrating a state where the body member of the fluid control device according to the first embodiment is cut in its width direction; 
         FIGS. 4( a ) and 4( b )  are cross-sectional views schematically illustrating a process of attaching a heater holding member to the body member of the fluid control device according to the first embodiment; 
         FIG. 5  is a cross-sectional view schematically illustrating a state where a body member of a fluid control device according to a second embodiment is cut in its width direction; 
         FIGS. 6( a )-6( c )  are cross-sectional views schematically illustrating a process of attaching a heater holding members to the body member of the fluid control device according to the second embodiment; 
         FIGS. 7( a ) and 7( b )  are cross-sectional views schematically illustrating a fluid control device of another embodiment according to the first embodiment; 
         FIGS. 8( a ) and 8( b )  are cross-sectional views schematically illustrating a fluid control device of another embodiment according to the first embodiment; and 
         FIG. 9  is a cross-sectional view schematically illustrating a fluid control device of another embodiment according to the second embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     In the following, the fluid control device according to the present invention will be described on the basis of the drawings. 
     The fluid control device according to the present invention is one that is used incorporated in, for example, a semiconductor manufacturing line or the like. 
     First Embodiment 
     As illustrated in  FIGS. 1 and 2 , a fluid control device  100  according to the present embodiment includes: a body member  10  having inside a flow path L through which fluid flows; respective equipment  20  that is installed on the body member  10  to control the fluid flowing through the flow path L; heaters  30  that heat the body member  10 ; and heater holding members  40  that are attached to the body member  10  to hold the heaters  30 . 
     The body member  10  is a block-shaped one. Specifically, the body member  10  is a rectangular parallelepiped member. In addition, the body member  10  includes, on one end surface in a longer direction, an introduction port  10   a  for introducing the fluid into the flow path L, as well as includes, on the other end surface in the longer direction, a lead-out port  10   b  for leading the fluid out of the flow path L. 
     In addition, the body member  10  is configured so that, with a predetermined surface extending in the longer direction as an installation surface S 1 , on the installation surface S 1 , the respective equipment  20  is installed and also the heater holding members  40  are attached. Also, the body member  10  includes, on the installation surface S 1 , a purge gas introduction port  10   c  for introducing purge gas into the flow path L. 
     The respective equipment  20  is one that controls the fluid flowing through the flow path L. Specifically, the respective equipment  20  in the present embodiment includes: a first pneumatic valve  20   a;  preheating tank  20   b,  first flow rate regulation valve  20   c,  heating tank  20   d , pressure sensor  20   e,  second pneumatic valve  20   f,  third pneumatic valve  20   g,  second flow rate regulation valve  20   h,  and flow rate sensor  20   i.  In addition, these respective pieces of equipment  20  are installed on the installation surface S 1  of the body member  10  in this order from the upstream side toward the downstream side of the flow path L. 
     Further, the respective equipment  20  in the present embodiment is configured to, while the first flow rate regulating valve  20   c  is regulating the flow rate of liquid material introduced from the introduction port  10   a,  heat the liquid material in the preheating tank  20   b  and in the heating tank  20   d  to produce material gas, and after feedback control of the flow rate of the material gas is performed using the second flow rate regulation valve  20   h  so that a measured value of the flow rate sensor  20   i  comes close to a set value, lead the material gas out of the lead-out port  10   b.    
     The heaters  30  are flat plate-shaped ones. As the heaters  30 , for example, rubber heaters can be used. 
     The heater holding members  40  are ones that are attached on the installation surface S 1  of the body member  10  and hold the heaters  30  along the side surfaces S 2  adjacent to the installation surface S 1  of the body member  10 . Here, the side surfaces S 2  are surfaces adjacent to the installation surface S 1  of the body member  10  along the longer direction, and the side surfaces S 2  in the present embodiment are orthogonal to the installation surface S 1 . In addition, the present embodiment is structured to attach the two heater holding members  40  to the body member  10 , and both the heater holding members  40  are symmetric in structure and their attachment structure with respect to the centerline a extending in the longer direction of the body member  10 , and therefore in the following, the structure will be described with a focus on one of the heater holding members  40 . 
     Specifically, the heater holding member  40  includes: paired attachment parts  40   a  respectively having facing surfaces  40   s  facing the installation surface S 1  of the body member  10 ; and a heater holding part  40   b  laid across the respective attachment parts  40   a.  In addition, as illustrated in  FIG. 3 , the heater holding part  40   b  extends along the side surface S 2  of the body member  10  with the facing surfaces  40   s  of the paired attachment parts  40   a  facing the installation surface S 1 . Also, the heater holding member  40  is configured so that the facing surface  40   s  of each of the attachment parts  40   a  is pressed toward the installation surface S 1  by a pressing mechanism  50 . The heater holding member  40  in the present embodiment includes the two attachment parts  40   a,  but may be one including one or three or more attachment parts  40   a.    
     In addition, the heater  30  is provided on one surface  40   x  of the heater holding part  40   b,  which faces the side surface S 2 , and on the other surface  40   y  on the other side. The heater  30  may be provided on the one surface  40   x  of the heater holding part  40   b  or on both of the one surface  40   x  and the other surface  40   y.    
     The pressing mechanism  50  is one that presses the facing surface  40   s  toward the installation surface S 1 . Specifically, the pressing mechanism  50  includes: a screw hole  50   a  provided in the installation surface S 1  of the body member  10 ; a long hole  50   b  that penetrates through the attachment part  40   a  of the heater holding member  40  and extends in a direction away from the heater holding part  40   b  (in a direction intersecting with the one surface  40   x ); and a bolt-like screw member  50   c  that is screwed to the screw hole  50   a  through the long hole  50   b.  In addition, the screw member  50   c  has a shaft part  50   x  that passes through the long hole  50   b  and a head part  50   y  that does not pass through the long hole  50   b.    
     Further, the pressing mechanism  50  is configured to, by screwing the screw member  50   c  into the screw hole  50   a,  allow the head part  50   y  of the screw member  50   c  caught by the long hole  50   b  to press the facing surface  40   s  of the attachment part  40   a  toward the installation surface S 1 . 
     In addition, a slide mechanism  60  interposes between the facing surface  40   s  and the installation surface S 1 . The slide mechanism  60  is one that slides the heater holding member  40  with respect to the body member  10  with use of the pressing by the pressing mechanism  50  so that the heater  30  held by the heater holding member  40   b  moves toward the side surface S 2  side. 
     Specifically, the slide mechanism  60  is one including: a first contact part  60   a  provided on the installation surface S 1 ; and a second contact part  60   b  provided on the facing surface  40   s.  In addition, the first contact part  60   a  is configured of a part of the installation surface S 1 , which is in contact with the facing surface  40   s,  and for example, a part of a surface shape or a protrusion shape. Also, the second contact part  60   b  is configured of a part of the facing surface  40   s,  which is in contact with the installation surface S 1 , and for example, a part of a surface shape or a protrusion shape. Further, the first contact part  60   a  and the second contact part  60   b  are configured to slidably contact with each other when the facing surface  40   s  is pressed toward the installation surface S 1  by the pressing mechanism  50 . 
     As illustrated in  FIG. 3 , the first contact part  60   a  and the second contact part  60   b  in the present embodiment are formed in a surface shape (specifically a planar surface shape) tilted with respect to the pressing direction X of the pressing mechanism  50 . In addition, the first contact part  60   a  and the second contact part  60   b  are configured to make a surface contact with each other. Further, the surface configuring the first contact part  60   a  is tilted so that an angle θ 1  formed with the side surface S 2  is an acute angle. Also, the surface configuring the second contact part  60   b  is tilted so that an angle θ 2  formed with the one surface surface  40   x  is an acute angle. In addition, the side surface S 2  is a surface faced by the heater  30  held by the heater holding member  40  that is attached on the installation surface S 1  by bringing the first contact part  60   a  and the second contact part  60   b  into contact with each other. Incidentally, the surface configuring the first contact part  60   a  is tilted so as to face in a direction (the right direction in  FIG. 3 ) opposite to a direction (the left direction in  FIG. 3 ) in which the side surface S 2  faces, and the surface configuring the second contact part  60   b  is tilted so as to face in a direction (the left direction in  FIG. 3 ) opposite to a direction (the right direction in  FIG. 3 ) in which the one surface  40   x  faces. In other words, in a state where the first contact part  60   a  and the second contact part  60   b  are in contact with each other, the surface configuring the second contact part  60   b  is tilted so as to face in the same direction as the direction (the left direction in  FIG. 3 ) in which the side surface S 2  faces. That is, it is only necessary that, in the state where the first contact part  60   a  and the second contact part  60   b  are in contact with each other, at least one of them is formed in a surface shape tilted with respect to the pressing direction X of the pressing mechanism  50 , and when the first contact part  60   a  is formed in a surface shape, the surface is tilted so as to face in the direction opposite to the direction in which the side surface S 2  faces, whereas when the second contact part  60   b  is formed in a surface shape, the surface is tilted so as to face in the same direction as the direction in which the side surface S 2  faces (in the direction opposite to the direction in which the one surface  40   x  faces). 
     In addition, at least one of the first contact part  60   a  and the second contact part  60   b  only has to be formed in a surface shape tilted with respect to the pressing direction X of the pressing mechanism  50 , and they may be configured so that the other makes a point contact or line contact with the one surface. In this case, it is preferable that the first contact part  60   a  and the second contact part  60   b  are configured to contact with each other at two or more points. 
     Also, in the state where the first contact part  60   a  and the second contact part  60   b  are in contact with each other, the heater holding part  40   b  is such that the one surface  40   x  is parallel to the side surface S 2  or the one surface  40   x  is tilted from the facing surface  40   s  toward the side surface S 2  side. 
     In addition, the body member  10  in the present embodiment is provided with the first contact part  60   a  in each of spaces on the installation surface S 1  between the pressure sensor  20   e  and the second pneumatic valve  20   f  and between the third pneumatic valve  20   g  and the second flow rate regulation valve  20   h.    
     Next, a method for attaching the heater holding member  40  to the body member  10  in the present embodiment will be described on the basis of  FIGS. 4( a ) and 4( b ) . 
     First, as illustrated in  FIG. 4( a ) , the heater holding member  40  is arranged so that the facing surface  40   s  faces the installation surface S  1 . Then, the first contact part  60   a  and the second contact part  60   b  are brought into contact with each other. 
     Subsequently, the shaft part  50   x  of the screw member  50   c  is screwed to the screw hole  50  through the long hole  50   b.  After that, by screwing the screw member  50   c  into the screw hole  50   a,  the head  50   y  of the screw member  50   c  presses the attachment part  40   a  to press the second contact part  60   b  toward the first contact part  60   a.    
     This causes sliding between the first contact part  60   a  and the second contact part  60   b  as illustrated in  FIG. 4( b ) . As a result, the heater holding member  40  slides with respect to the body member  10 . Then, the heater  30  held by the heater holding part  40   b  indirectly closely contacts with the side surface S 2  via the heater holding member  40   b.    
     Second Embodiment 
     As illustrated in  FIGS. 5 and 6 , a fluid control device  100  according to the present embodiment includes: a body member  10  having inside a flow path L through which fluid flows; respective equipment  20  that is installed on the body member  10  to control the fluid flowing through the flow path L; heaters  30  that heat the body member  10 ; and a holding mechanism M that holds the heater  30  while bringing the heaters  30  into close contact with the body member  10 . 
     The body member  10  is a block-shaped one. Specifically, the body member  10  is a rectangular parallelepiped member. Also, the body member  10  includes an installation surface S 1  extending in a longer direction, and paired side surfaces S 2  extending in the longer direction and adjacent to the installation surface S 1 . In addition, the body member  10  is configured so that the respective equipment  20  is installed on the installation surface S 1 . Accordingly, the paired side surfaces S 1  face in mutually opposite directions. 
     The holding mechanism M includes paired heater holding plates  70 , a locking structure  80 , and a connecting structure  90 . 
     The paired heater holding plates  70  are ones that face corresponding ones of the side surfaces S 2  of the body member  10  to hold the heaters  30  with the side surfaces S 2 . For example, the heater holding plates  70  are ones formed by folding an elastic plate material. 
     Specifically, the heater holding plates  70  respectively include: holding parts  71  that extend along the side surfaces S 2  of the body member  10 ; hooking parts  72  that are formed at one end parts extending from the holding parts  71  in a direction opposite to a direction X (the upper direction in  FIG. 5 ) in which the installation surface S 1  of the body member  10  faces; and facing parts  73  that are formed at the other end parts extending from the holding parts  71  in the direction X in which the installation surface S 1  faces. Also, the heater holding plates  70  are configured to sandwich and hold the heaters  30  between the holding parts  71  and the side surfaces S 2 . In addition, in other words, the direction in which the installation surface S 1  faces can also be said to be the upright direction of the respective equipment  20  installed on the installation surface S 1 . 
     Specifically, the holding parts  71  extend facing the body member  10  and the respective equipment  20  installed on the installation surface S 1  of the body member  10 . Further, the holding parts  71  are attached with the heaters  30  on the inner surfaces thereof facing the side surfaces S 2 . The hooking parts  72  are formed by folding the one end parts of the heater holding plates  70  in a downward L-shape. Also, the facing parts  73  are formed by folding the other end parts of the heater holding plates  70  at a right angle, and configured so as to face the installation surface S 1 . In addition, the facing parts  73  are formed with through-holes  73   h  constituting the connecting structure  90 . 
     The locking structure  80  is one that is provided to the body member  10  to lock the one end parts of the paired heater holding plates  70 . Specifically, the locking structure  80  is formed in an elongated rectangular shape extending along the opposite surface S 3  to the installation surface S 1  of the body member  10 , and includes: a plate  81  formed to have a wider width than the opposite surface S 3 ; and locking pieces  82  that rise from both sides extending in the longer direction of the plate  81  and face the side surfaces S 2  of the body member  10 . 
     The plate  81  is fixed to the opposite surface S 3  of the body member  10 . The locking pieces  82  extend along the side surfaces S 2  of the body member  10 , and also include locking surfaces  82   s  facing the side surfaces S 2 . Also, the distance between the locking surfaces  82   s  and corresponding ones of the side surfaces S 2  is set to a distance that is the same as or shorter than the thickness of the heaters  30 . In addition, the locking structure  80  may be configured of members different from the body member  10  as in the present embodiment, or may be provided integrally with the body member  10 . 
     The connecting structure  90  is one that mutually connects the other end parts of the paired heater holding plates  70 , which extend in the direction in which the installation surface S 1  faces. Specifically, the connecting structure  90  includes: the through-holes  73   h  formed in the facing parts  73 ; a connecting plate  91  laid between the respective facing parts  73 ; and screws  92  screwed to the connecting plate  91  through the through-holes  73   h.  The connecting structure  90  is adapted to mutually connect the facing parts  73  formed at the other end parts of the paired heater holding plates  70  in a position facing the installation surface S 1  and interposing the respective equipment  20  installed on the installation surface S 1 . 
     Further, the paired heater holding plates  70  are configured to bend in mutually facing directions in a state where the hooking parts  72  (the one end parts) are locked by the locking structure  80  and the facing parts  73  (the other end parts) are connected by the connecting structure  90 . This allows the heaters  30  to be brought into a state of being pressed toward the side surfaces S 2  by the elasticity of the bent heater holding plates  70 . 
     Also, the heater holding plates  70 , the plate  81 , and the connecting plate  91  are all such that length in the longer direction is the same as or longer than the length of the body member  10  in the longer direction. In doing so, the holding mechanism M is adapted to, while holding the heaters  30  on the side surfaces S 2  of the body member  10 , configure a housing that houses inside the body member  10  and the respective equipment  20 . 
     Next, an assembly procedure for the fluid control device  100  according to the present embodiment will be described. 
     First, as illustrated in  FIG. 6( a ) , the plate  81  constituting the locking structure  80  is fixed to the opposite surface S 3  to the installation surface S 1  of the body member  10 . In this case, the locking pieces  82  are arranged separated from the side surfaces S 2  of the body member  10 . Then, the hooking parts  72  of the paired heater holding plates  70  are inserted between the locking surfaces  82   s  and the side surfaces S 2  and locked to the locking pieces  82 . Subsequently, as illustrated in  FIG. 6( b ) , with locking positions to the locking pieces  82  as pivot points, the paired heater holding plates  70  are rotated to positions where the holding parts  71  are substantially parallel to the side surfaces S 2 . In doing so, the heaters  30  are pressed against the side surfaces S 2  by the elasticity of the heater holding plates  70  and brought into a state of closely contacting with the side surfaces S 2  of the body member  10 . Finally, as illustrated in  FIG. 6( c ) , the facing parts  73  of the paired heater holding plates  70  are mutually connected by the connecting structure  90 . Specifically, the paired heater holding plates  70  are connected by screwing the screws  92  passed through the through-holes  73   h  of the facing parts  73  to the connecting plate  91 . In doing so, the heaters  30  are sandwiched between the holding parts  71  of the heater holding plates  70  and the side surfaces S 2  of the body member  10 , and held in the state of closely contacting with the side surfaces S 2 . 
     In such a configuration, since the heater holding plates  70  hold the heaters  30  while pressing the heaters  30  against the side surfaces S 2  by their elastic restoring forces, the heaters  30  can be brought into close contact with the body member  10 . This allows the heat of the heaters  30  to be efficiently transferred to the body member  10 . Also, since the holding mechanism M can also serve as the housing that houses the body member  10  and the respective equipment  20 , the need to separately providing the body member  10  with dedicated parts for holding the heaters  30  is eliminated, making it possible to reduce the number of parts. Further, since the facing parts  73  of the paired heater holding plates  70 , which face the installation surface S 1 , are configured to be connected to each other by the connecting structure  90 , the connection between both the heater holding plates  70  by the connecting structure  90  can be released from the installation surface S 1  side of the body member  10 . 
     In addition, the locking structure  80  may also be another structure, and for example, may be a structure fixed to the side surfaces S 2  of the body member  10 . Also, the present embodiment is configured to lock the heater holding plates  70  to the locking pieces  82  provided to the plate  81 , but, for example, may be configured to lock the heater holding plates  70  to locking holes provided in the plate  81 . Further, the connecting structure  90  may be another structure, and for example, may be a structure provided with hooks that mutually engage with the other end parts of the paired heater holding plates  70 . 
     Other Embodiments 
     As illustrated in  FIG. 7( a ) , as another embodiment according to the first embodiment, the heater holding member  40  may be configured so that the one surface  40   x  of the heater holding part  40   b  is tilted from the facing surface  40   s  toward the side surface S 2  side. In such a configuration, when the facing surface  40   s  is pressed toward the installation surface S 1  by the pressing mechanism  50 , at least part of the heater holding part  40   b  is biased toward the side surface S 2 , increasing a force to closely contact with the side surface S 2 . 
     Also, in the above-described first embodiment, the heater holding member  40  includes one member; however, as illustrated in  FIG. 7( b ) , the heater holding member  40  may be configured of multiple members (two members in  FIG. 7( b ) ). In addition, similarly, in the above-described embodiments, the body member  10  is configured of one member, but may be configured of multiple members. 
     Further, in the above-described first embodiment, the first contact part  60   a  and the second contact part  60   b  are respectively configured in parallel planar surface shapes, but as illustrated in  FIG. 8( a ) , may be respectively configured in parallel curved shapes. 
     In addition, as illustrated in  FIG. 8( b ) , at least one of the installation surface S 1  and the facing surface  40   s  may be provided with a contact surface CS 1 , CS 2  orthogonal to the pressing direction X separately from the first contact part  60   a  and the second contact part  60   b . Such a configuration enables the contact between the contact surfaces CS 1  and CS 2  to restrict the pressing by the pressing mechanism  50 , as well as enables the facing surface  40   s  to be positioned with respect to the installation surface S 1 . 
     Also, in the above-described first embodiment, the heater holding member  40  is configured to be attached to the installation surface S 1  of the body member  10 , but may be configured to be attached to the opposite surface to the installation surface S 1  (to the lower surface when defining the installation surface S 1  as the upper surface of the body member  10 ). 
     Further, in the above-described first embodiment, the other surface  40   y  of the heater holding part  40   b  is provided with the heater  30 ; however, the one surface  40   x  of the heater holding part  40   b  may be provided with the heater  30  and the other surface  40   y  may be provided with a heat insulating material. Such a configuration allows the heat of the heater  30  to be more efficiently transferred to the body member  10 . 
     In addition, as another embodiment according to the first embodiment, between the first contact part  60   a  and the second contact part  60   b,  a washer member whose friction resistance is lower than those of the first contact part  60   a  and second contact part  60   b  may be interposed. Further, on the surface of the first contact part  60   a,  a material whose friction resistance is lower than that of the first contact part  60   a  may be stacked, and on the surface of the second contact part  60   b,  a material whose friction resistance is lower than that of the second contact part  60   b  may be stacked. Such a configuration allows the heater holding member  40  to be easily slid with respect to the body member  10 , improving workability. Further, it is also possible to prevent material from being firmly fixed to the first contact part  60   a  and the second contact part  60   b.    
     In addition, the above-described second embodiment is structured to mutually connect the other end parts of the paired heater holding plates  70  by the connecting structure  90 , but may be structured to connect the other end parts (facing parts  73 ) of the heater holding plates  70  to the body member  10  (specifically, to the installation surface S 1  of the body member  10 ) by the connecting structure  90 . In this case, it is only necessary that the connecting structure  90  is configured to include: for example, the through-holes  73   h  formed in the facing parts  73 , screw holes  10   h  provided in the installation surface S 1  of the body member  10 ; and screws  92  screwed to the screw holes  10   h  through the through-holes  73   h.    
     Besides, it goes without saying that the present invention is not limited to each of the above-described embodiments, but can be variously modified without departing from the scope thereof. 
     LIST OF REFERENCE CHARACTERS 
       100 : Fluid control device 
       10 : Body member 
     S 1 : Installation surface 
     S 2 : Side surface 
       20 : Respective equipment 
       30 : Heater 
       40 : Heater holding member 
       40   a:  Attachment part 
       40   s:  Facing surface 
       40   b:  Heater holding part 
       40   x:  One surface 
       40   y:  The other surface 
       50 : Pressing mechanism 
       50   a:  Screw hole 
       50   b:  Long hole 
       50   c:  Screw member 
       60 : Slide mechanism 
       60   a:  First contact part 
       60   b:  Second contact part 
     M: Holding mechanism 
       70 : Heater holding plate 
       80 : Locking structure 
       90 : Connecting structure