TW201835481A - Pipe member - Google Patents

Abstract

To provide a pipe member of which a tubular window member can be removed without involving removal of the pipe member from a fluid piping member. A pipe member 100 is incorporated between fluid piping members so as to constitute a part of the fluid piping. The pipe member 100 is provided with a pipe member body 102, a tubular window member 104, and a holding member 106. The tubular window member 104 is formed from a transparent material such that a flow path 112 and a vane member 108 in the inside thereof can be visually seen from the outside. Further, the tubular window member 104 is held by the holding member 106 at a position incorporated in the pipe member body 102. The holding member 106 is displaced rearward from the holding position to a release position so that the holding member 106 is separated from the tubular window member 104, thereby releasing the tubular window member 104. Consequently, the tubular window member 104 can be removed from the pipe member body 102 through a lateral opening 130.

Description

Pipe member

The present invention relates to a pipe member that is assembled between a fluid pipe member and constitutes a part of a fluid pipe, and more particularly, a pipe member that can confirm a fluid flow in a fluid pipe.

In order to visually confirm the flow of the fluid in the fluid pipe, it is known to visually observe the pipe member inside the flow path from the portion made of the transparent material. For example, the flow rate sensor disclosed in Patent Document 1 includes a transparent pipe member, a joint screwed to both ends thereof, and a turbine unit mounted in the pipe member. When a fluid flows in the pipe member, the turbine unit changes rotation in response to the flow rate. In the direction and the axial direction, the flow of the fluid and its flow rate can be measured by reading the displacement amount of the turbine. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. SHO 58-9025

[Problems to be solved by the invention]

In the above-described flow sensor, when it is continuously used, the inner peripheral surface of the pipe is gradually soiled by the fluid flowing through the transparent pipe or the solid contained therein, and the visibility inside the flow path may be deteriorated. In this case, the transparent tube is taken out to clean the inside or to exchange new tubes. However, in the conventional pipe member of the above-described flow sensor, in order to remove the pipe member which is a transparent member of the tubular window member, it is necessary to remove the pipe member itself from the fluid pipe member and further decompose the pipe member. This kind of work is a very complicated and time-consuming job.

Accordingly, the present invention is directed to providing a pipe member which can remove the tubular window member without removing the pipe member from the fluid pipe member. [Means to solve the problem]

That is, the present invention provides a pipe member which is a pipe member which is assembled between the fluid pipe members and constitutes a part of the fluid pipe, and includes: a pipe member body which is a pipe member body defining the first passage, and has the first member a long side axis of the passage communicates with a side opening of the opening of the first passage from a side; a tubular window member is a tubular window member that is assembled to the tubular member body through the side opening, and is assembled in The pipe member body communicates with the first passage to form a second passage of the flow path of the pipe member, and at least a portion thereof is formed of a transparent material, and the inside of the flow path can be visually observed by the at least one portion; and the holding member is a retaining member mounted to the tubular member body that is displaceable between a retaining position that is engaged with the tubular window member to assemble the tubular window member to the tubular member body, from the tubular Separating the window member to release the retention of the tubular window member such that the tubular window member can be removed from the tubular member body through the lateral opening Liberation position.

In the pipe member, the tubular window member can be removed through the side opening of the pipe member body, so that it is not necessary to remove the pipe member itself from the fluid pipe member when the tubular window member is removed as in the prior art.

Preferably, the holding member is slidably assembled to the pipe member body in the direction of the longitudinal axis between the holding position and the liberating position, and the tubular window member is located at the liberation of the holding member In the positional state, it is displaceable between the assembly position of the pipe member body and the displacement from the assembly position to the longitudinal axis to release the communication between the first passage and the second passage. In the communication release position, the tubular window member can be removed from the pipe member body through the side opening portion at the communication release position.

Preferably, the pipe member body has a cylindrical front portion and a rear portion, and an intermediate portion between the front portion and the rear portion, the side opening portion being formed at the intermediate portion, the tubular portion The window member is integrated with the tubular member body in the direction of the longitudinal axis at the assembly position, and is sealingly engaged with the front portion. The holding member is a tubular member having a third passage. The tubular member and the rear portion are sealed and held at a position, and the third passage constitutes the flow path of the tubular member together with the first passage and the second passage.

Further, the holding member is detachable from the tubular member body through the side opening portion in a state where the tubular window member is removed from the tubular member body.

With the above-described configuration, it is easy to clean or exchange the holding member.

Preferably, the holding member has a protruding portion that protrudes outward in the radial direction from the outer peripheral surface of the holding member, and the tubular member body has a receiving recess that receives the protruding portion, and the holding member is located at the holding position. The tubular member body is rotatable about the longitudinal axis, and the protruding portion can be side-mounted when the protruding portion is integrated with the receiving concave portion in the direction of the long-side axis. The receiving recess is displaced to the liberation position, and when it is not at the integrated rotational position, the protruding portion interferes with the tubular member body and cannot be displaced to the liberation position.

According to the above-described configuration, the holding member is previously shifted from the integrated rotational position, whereby the holding member can be prevented from being erroneously displaced from the holding position to the liberated position.

Preferably, the protruding portion has a locking extension extending along an outer circumferential surface of the tubular member body, and an outer circumferential surface of the tubular member body and the locking projection portion facing the outer circumferential surface One of the side surfaces is provided with a locking projection, and the other is provided with a locking recess, and the holding member rotates to the locking rotation position when the holding position is the locking rotation position, the locking projection and the locking recess The engagement of the holding member is suppressed by the engagement.

Further, in place of the above configuration, the protruding portion has a locking projection on a sliding engagement surface that is slidably engaged with the tubular window member, and the tubular window member has a locking recess for receiving the locking projection, the holding When the holding position is rotated from the integrated rotational position to the locked rotational position, the locking projection engages with the locking recess to suppress the rotation of the holding member.

In this case, the sliding engagement surface of the holding member may be provided with a flexible portion having flexibility in the direction of the longitudinal axis, and the locking projection is provided at the flexible portion.

According to the above-described configuration, it is possible to prevent the holding member from being erroneously rotated from the locking rotation position toward the integrated rotation position, so that it is possible to surely prevent the holding member from being erroneously displaced to the liberation position.

Preferably, the pipe member body has a guide surface formed at a side edge of the side opening portion and extending in a direction of the long axis, the tubular window member having a radial direction from an outer circumferential surface of the tubular window member a guide portion that protrudes outwardly, and when the tubular window member is inserted into the first passage from the side opening and is positioned at the communication release position, the guide portion abuts against the guide surface to open the tubular window The member is fitted to the tubular member body at a position in the direction of the longitudinal axis, and when the tubular window member is displaced from the communication releasing position to the assembled position, the guiding portion is slid on the guiding surface.

With the above-described structure, the alignment of the tubular window member at the time of attaching the tubular member body is facilitated.

Preferably, the flow display member is disposed in the second passage of the tubular window member and displaced by a fluid flowing in the flow passage.

Specifically, the flow display member is a blade member that is mounted in the tubular window member so as to be rotatable in the circumferential direction to the longitudinal axis, and is detachable from the tubular member body together with the tubular window member.

By having the above-described flow display member, it is possible to easily visually observe the presence or absence of the flow of the fluid in the flow path of the pipe member. Moreover, the blade members are also removed together, so that the blade members can be easily washed or exchanged.

Preferably, the tubular window member has a window outer circumferential surface that is exposed to the outside when the tubular member body is assembled, and a window inner circumferential surface that is located on the inner side in the radial direction of the outer circumferential surface of the window. The inside of the second passage is The outer peripheral surface of the window and the inner peripheral surface of the window are visually observed, and the outer peripheral surface of the window is shaped such that the center of curvature of the outer peripheral surface of the window is located between the center of curvature of the inner peripheral surface of the window and the outer peripheral surface of the window. . Specifically, the cross section of the outer peripheral surface of the window and the inner peripheral surface of the window may each have an arc shape.

By making the outer peripheral surface of the window and the inner peripheral surface of the window have the above-described general shape, the blade member disposed in the tubular window member can be more enlarged, and the rotation of the blade member can be more easily confirmed.

Preferably, the side opening portion has first and second side opening portions formed at opposite positions in the radial direction of the first passage, and the tubular window member passes through the first and second sides. Any one of the square opening portions may be attached to the pipe member body.

When there is only one side opening, when the pipe member is attached between the fluid pipe members, it may be difficult to attach or detach the tubular window member due to the side opening toward the wall side. By providing two side opening portions at positions facing each other in the radial direction, it is possible to reduce the possibility of this state.

Hereinafter, an embodiment of the pipe member according to the present invention will be described based on an additional drawing.

As shown in FIGS. 1 to 4, the pipe member 100 according to the first embodiment of the present invention includes a pipe member body 102 to which a fluid pipe member (not shown) is connected at both ends, and is attached to the pipe member. The tubular window member 104 and the retaining member 106 of the body 102 are mounted to the blade member 108 of the tubular window member 104. The pipe member 100 is a part of a fluid pipe that is assembled between the fluid pipe members. The tubular window member 104 is entirely composed of a transparent material, and the tubular window member 104 and the blade member 108 constitute the flow visual member 110. The blade member 108 disposed inside the tubular window member 104 is visually viewable from the outside through the transparent tubular window member 104. The blade member 108 is rotated by the flow of the fluid in the flow path 112 of the pipe member 100, and the rotation of the blade member 108 is visually observed through the transparent tubular window member 104, whereby the presence or absence of fluid flow in the flow path 112 can be confirmed. .

The pipe member body 102 is formed by a cylindrical front portion 114, a cylindrical rear portion 116, and an intermediate portion 118 therebetween. As shown in FIG. 5, the pipe member body 102 defines a first passage 124 that extends from the front opening 120 of the front portion 114 to the rear opening 122 of the rear portion 116. A female screw portion 126 for fixing the fluid piping member is formed in the front portion 114 and the rear portion 116, respectively. Further, as shown in FIG. 2, the intermediate portion 118 has two pillar portions 128 that connect the front portion 114 and the rear portion 116, and the pillar portions 128 are formed to face each other in the radial direction of the first passage 124. The first side opening 130 and the second side opening 132 are provided. The side opening portions 130 and 132 are open to the first passage 124 from the side to the longitudinal axis L of the first passage 124. The rear portion 116 and the intermediate portion 118 are formed as an integral member, and the front portion 114 is a member different from the rear portion 116 and the intermediate portion 118, and is mounted to be rotatable about the longitudinal axis L with respect to the intermediate portion 118. According to the above-described configuration, when the fluid pipe member is fixed to the other female screw portion 126 in the state where the female screw portion 126 of the front portion 114 and the rear portion 116 has the fixed fluid pipe member, the fluid pipe member can be fixed to the other female screw portion 126. The other side rotates the fluid pipe member to be mounted next, so that the other female screw portion 126 can be fixed to the pipe flow path member without rotating the pipe flow path member. Further, when the user visually views the blade member 108 through the tubular window member 104, the position of the intermediate portion 118 in the rotational direction can be changed to position the column portion 128 at a position that does not obstruct the visibility.

The tubular window member 104 has a cylindrical peripheral wall portion 134 which defines a second passage 136 on the inner side thereof as shown in FIG. As shown in FIG. 6, the front end portion 138 of the peripheral wall portion 134 is provided with a shaft support portion 140 that extends in the radial direction across the second passage 136, and is provided on the long side from the vicinity of the center of the shaft support portion 140. The direction of the axis L is a rotating shaft 142 that extends rearward (leftward in the drawing). The tubular window member 104 is assembled to the pipe member body 102 in an assembled state, and the front end portion 138 of the peripheral wall portion 134 is inserted into the inner side of the front portion 114 of the pipe member body 102 and is positioned in the direction of the long axis L The location where the component body 102 is integrated. The front end portion 138 is sealed and engaged with the inner circumferential surface 114a of the front portion 114, and the second passage 136 of the tubular window member 104 is in a state of being in communication with the first passage 124 in the front portion 114 of the pipe member body 102.

The blade member 108 has a main body portion 144 extending in the direction of the longitudinal axis L, and two spiral blades 146 formed in a spiral shape on the outer circumferential surface 144a of the main body portion 144. The body portion 144 of the blade member 108 is a cylindrical shaft holding portion 144 that constitutes a cylindrical shape that holds the rotating shaft 142 of the tubular window member 104. The shaft holding portion (body portion) 144 holds the rotation shaft 142 of the tubular window member 104 so as to be relatively rotatable. Thereby, the blade member 108 can rotate the rotation shaft 142 centering on the rotation center axis C. In the assembled state, as shown in FIGS. 5 and 6, the blade member 108 is in a state in which the entire position is in the position of the second passage 136 of the tubular window member 104.

The holding member 106 has a cylindrical peripheral wall portion 148 which defines a third passage 150 on the inner side thereof as shown in FIG. Further, a blade support portion 152 that extends in the radial direction across the third passage 150 is provided in the front end surface 148a of the peripheral wall portion 148, and the rear end portion 154 of the blade member 108 is supported from the rear by the blade support portion 152. . The retaining member 106, in the assembled state, has its rear end portion 156 inserted into the rear portion 116 of the tubular member body 102 at a position integrated with the tubular member body 102 in the direction of the long side axis L. The rear end portion 156 is sealingly engaged with the inner circumferential surface 116a of the rear portion 116 of the pipe member body 102, and the front end portion 158 is sealingly engaged with the rear end portion 160 of the tubular window member 104. Thereby, the third passage 150 of the holding member 106 communicates with the first passage 124 and the second passage 136, and constitutes the flow passage 112 of the tubular member 100 together with the first passage 124 and the second passage 136. Further, as shown in FIGS. 1 and 2, the holding member 106 has two projecting portions 162 projecting outward in the radial direction from the outer peripheral surface 148b of the peripheral wall portion 148, and the projecting portion 162 has a body along the pipe member body 102. The outer peripheral surface 102a extends to the locking extension portion 164. The locking extension portion 164 is provided with a through hole (locking concave portion) 166 that penetrates the inner side surface thereof, and the through hole 166 is a ball that is pressed into the outer circumferential surface 102a of the pipe member body 102 in the assembled state. A portion of the stop projection 168 is received, and the position of the retaining member 106 against the tubular member body 102 in the rotational direction is maintained. The holding member 106 can slide in the direction of the longitudinal axis L and the rotation direction around the long axis L as will be described later, and as shown in FIGS. 1 , 3 and 4 , the locking extension is performed. When the through hole 166 of the portion 164 locks the rotation position of the ball 168, the rotation of the through hole 166 and the ball 168 is suppressed, and the rotation in the circumferential direction is suppressed, and the tube member body 102 is opposed to the tube member body 102 by the protruding portion 162. The holding position at which the tubular window member 104 is assembled to the tubular member body 102 cannot be displaced in the direction of the longitudinal axis L toward the rear. Further, the through hole 166 as the locking recess and the ball 168 as the locking projection may be arranged to be opposite to each other, or may be a mechanism in which the through hole 166 and the ball 168 are engaged with each other.

In the pipe member 100, the tubular window member 104 can be attached and detached in a state in which the fluid pipe member is coupled and fixed to the pipe member body 102 and assembled to the fluid pipe. The procedure at the time of disassembling the tubular window member 104 is as follows.

First, in the assembled state of FIG. 4, a force in a rotational direction in which the engagement between the through hole 166 of the holding member 106 that is engaged with each other and the ball 168 of the pipe member body 102 is released is applied to the holding member 106. The engagement is released and the holding member 106 is rotated from the locked rotational position of FIG. 4 to the integrated rotational position of FIG. In this integrated rotational position, the projection 162 of the retaining member 106 is integrated with the receiving recess 170 formed in the rear portion 116 of the tubular member body 102 in the direction of the long axis L. Next, the holding member 106 is displaced rearward from the holding position of FIG. 7 in the direction of the long-side axis L to be positioned at the liberation position of FIG. The retaining member 106 is in a position to be separated from the tubular window member 104 when in the liberated position, and the holding of the tubular member 104 by the retaining member 106 is released. Also, in the integrated rotational position, the process of displacing the retaining member 106 from the retaining position to the liberated position is such that the projection 162 of the retaining member 106 is received into the receiving recess 170 of the tubular member body 102, thereby causing the retaining member 106 Can be displaced to the liberation position. On the other hand, in a state where there is no position in the integrated rotational position, even if the holding member 106 is to be displaced rearward from the holding position toward the liberation position, the protruding portion 162 of the holding member 106 and the rear portion of the pipe member body 102 may be caused. The interference of 116 does not allow the retaining member 106 to be displaced to the liberation position. Next, the tubular window member 104 is pulled away from the assembled position of Fig. 8 assembled to the tubular member body 102 from the front portion 114 of the tubular member body 102, and is positioned at the communication release position of Fig. 9. In the communication release position, the sealing engagement between the tubular window member 104 and the front portion 114 of the pipe member body 102 is released, and the communication between the first passage 124 and the second passage 136 is also released. The tubular window member 104 positioned in the communication release position is pulled out through the first side opening portion 130 (FIGS. 1 to 3) of the pipe member body 102, whereby the tubular window member 104 and the blade member 108 installed therein are pulled out. Together removed from the tubular member body 102 (Fig. 10). As described above, the pipe member 100 does not have to remove the pipe member body 102 from the fluid pipe member when the tubular window member 104 is removed.

When the removed tubular window member 104 is attached, the above-described removal is performed in reverse. The tubular window member 104 is assembled by being inserted into the tubular member body 102 through either of the first side opening 130 and the second side opening 132. As can be seen from FIG. 2, the pillar portion 128 which is the side edge of the first and second side opening portions 130 and 132 of the pipe member body 102 is formed with a guide surface 172 extending in the direction of the long axis L. A guide portion 174 protruding from the outer peripheral surface 104b is formed in the tubular window member 104. When the tubular window member 104 is inserted into the pipe member body 102 through any of the first and second side opening portions 130 and 132, the guide portion 174 of the tubular window member 104 abuts against the guide member of the pipe member body 102. The drawing surface 172 makes the tubular window member 104 coaxial with each other at a position where the pipe member body 102 is integrated in the direction of the longitudinal axis L. By the guide surface 172 and the guide portion 174, the tubular window member 104 is not detached from the side opening portions 130, 132 on the opposite side to the side opening portions 130, 132 that pass through the insertion, and is tubular. The alignment of the window member 104 with the tube member body 102 also becomes easy. Further, when the tubular window member 104 is displaced from the communication releasing position of FIG. 9 to the assembled position of FIG. 8, the guiding portion 174 is slid on the guiding surface 172 to guide the tubular window member 104 to an appropriate position. .

In the pipe member 100, in a state in which the tubular window member 104 is removed from the pipe member body 102 (FIG. 10), as shown in FIG. 11, the holding member 106 is forward (to the right in the figure) The displacement is pulled from the rear portion 116 of the tubular member body 102 and further removed from the tubular member body 102 by the lateral opening portions 130, 132 (Fig. 12).

The tubular window member 104 when removed from the pipe member body 102 has a blade member 108 mounted thereto. As shown in FIG. 13, the first locking portion 178 that protrudes outward in the radial direction is formed at the rear end portion 176 of the rotating shaft 142 of the tubular window member 104. Further, the rear end portion 176 of the first locking portion 178 of the rotating shaft 142 is divided into two by the slit 180 to have flexibility in the radial direction. The shaft holding portion 144 of the blade member 108 is formed with a second locking portion 182 that protrudes inward in the radial direction from the inner circumferential surface 144b. As described above, the blade member 108 holds the rotating shaft 142 by the shaft holding portion 144, whereby the tubular window member 104 can be rotated centering on the central axis of rotation C while the rotating shaft 142 can be aligned along the central axis of rotation C to shift. As shown in FIG. 6, the blade member 108 has a front end portion 184 which is freely displaceable from the first position of the shaft support portion 140 of the tubular window member 104 to the first position as shown in FIG. The second position where the locking portion 178 is engaged with the second locking portion 182. In other words, the blade member 108 is displaced to the second position without special force, but it is not displaced by the force of the blade member 108 itself, so that the tubular member 104 can be prevented from falling off naturally and falling. . The blade member 108 is in a state in which the rear end portion 154 protrudes from the rear end surface 104a of the tubular window member 104 at the second position. When the protruding rear end portion 154 of the blade member 108 positioned at the second position is further pulled rearward, the first locking portion 178 of the rotating shaft 142 is radially inclined by the second locking portion 182 of the shaft holding portion 144. By the inner side pressing, the rear end portion 176 of the rotating shaft 142 divided into two is bent inward in the radial direction, and the engagement between the first locking portion 178 and the second locking portion 182 is released. In other words, the first locking portion 178 and the second locking portion 182 are configured to be engaged, and the blade member 108 is pulled by a force of a certain degree or more to thereby disengage the blade member 108 from the second position. Further displaced to the rear. The blade member 108 is displaced to the rear beyond the second position as long as it is pulled, and can be easily removed from the tubular window member 104 as shown in FIG. By removing the blade member 108 in this manner, the inner peripheral surface 104c of the tubular window member 104 can be easily washed. When the blade member 108 is attached to the tubular window member 104, the rotating shaft 142 is inserted into the shaft holding portion 144 to press the blade member 108 into the tubular window member 104, and the second locking of the blade member 108 is performed. The portion 182 deflects the first locking portion 178 of the rotating shaft 142 inward in the radial direction, and causes the second locking portion 182 to straddle the first locking portion 178. As described above, the blade member 108 becomes easy to mount.

When the tubular window member 104 is attached and detached to the tubular member body 102, the retaining member 106 is positioned at the liberation position as shown in FIGS. 9 and 10. At the liberation position, the blade support portion 152 of the holding member 106 is formed in a direction toward the first side opening portion 130 and the second side opening portion 132 as shown in FIG. 15 (left-right direction in the drawing) . As described above, the blade member 108 is held in the first position by the blade support portion 152 in the assembled state, and can be freely displaced to the second position without the support of the blade support portion 152. During the attachment or detachment of the tubular window member 104, if the blade member 108 is displaced from the first position toward the second position, the rear end portion 154 of the blade member 108 is caught by the holding member 106. In the pipe member 100, the blade supporting portion 152 is directed to the first and second side opening portions 130 and 132, that is, the tubular window member 104 is passed through the first and second side opening portions 130 and 132. The mounting and dismounting extend in the direction of the moving direction of the tubular window member 104, so that the blade member 108 is continuously supported by the blade supporting portion 152 during the mounting and dismounting process. Thereby, the blade member 108 is prevented from being displaced to the second position side and caught inside the holding member 106.

As for the pipe member 200 according to the second embodiment of the present invention, as shown in Fig. 16, the blade member 208 and the structure for holding it are different from those of the pipe member 100 according to the first embodiment. The flow visual member 210 of the pipe member 200 is provided with a shaft holding portion 244 fixed to the peripheral wall portion 234 of the tubular window member 204, and the main body portion 242 of the blade member 208 constitutes a rotating shaft 242. The shaft holding portion 244 of the tubular window member 204 has a first locking portion 278 that protrudes inward in the radial direction from the inner circumferential surface 244b thereof. Further, the rotation shaft (body portion) 242 of the blade member 208 has a second locking portion 282 that protrudes outward in the radial direction from the distal end portion 284. In the illustrated assembled state, the segment portion 288 of the front end portion 284 of the rotating shaft 242 abuts or approaches the rear end surface 290 of the shaft holding portion 244, and the rear end surface 292 of the rotating shaft 242 is the blade supporting portion of the holding member 206. Supported by 252. Thereby, the position of the blade member 208 in the direction of the rotation center axis C is maintained. The rear end surface 292 of the rotating shaft 242 has a conical shape, and a conical recess 294 that is engaged with the conical rear end surface 292 of the rotating shaft 242 is formed in the blade supporting portion 252, and the end surface 292 after the rotating shaft 242 is fixed by the recess 294. The radial direction position is such that the rotation center axis C does not shift. In a state where the tubular window member 204 has been removed from the pipe member body 202, the blade member 208 can be freely displaced from the first position of FIG. 16 to the second locking portion 282 abutting against the shaft holding portion 244. 1 second position of the locking portion 278. At the second position, the portion protruding from the rear end surface 204a of the tubular window member 204 of the blade member 208 is grasped and pulled, thereby releasing the engagement between the first locking portion 278 and the second locking portion 282, and The blade member 208 is removed from the tubular window member 204. In this embodiment, since the tubular window member 204 has no rotating shaft, after the blade member 208 is removed, the inside of the tubular window member 204 is in a state of being broadly emptied, so that it is easier to clean the inner peripheral surface of the tubular window member 204. 204c.

As shown in FIG. 17, the pipe member 300 according to the third embodiment of the present invention includes a C-shaped locking member 396 that is detachably attached to the outer circumferential surface 302a of the pipe member body 302. The locking member 396 is attached to the tubular member body 302 with the holding member 306 in the holding position, whereby the protruding portion 362 of the holding member 306 interferes with the locking member 396 to prevent the holding member 306 from being moved from the holding position to the rear. Displacement. That is, in a state in which the lock member 396 is attached, the holding member 306 cannot be displaced to the liberation position, thereby preventing the communication of the flow path from being erroneously released. Further, in the case of using such a locking member 396, the holding member 306 does not have to be rotatable in the circumferential direction.

The pipe member 400 according to the fourth embodiment of the present invention has a structure that is particularly close to the pipe member 200 of the second embodiment, but the shape of each member is different as shown in Figs. 18-24.

As shown in FIGS. 19 and 20, a flat holding surface 404d is formed on the outer peripheral surface 404b of the tubular window member 404. When assembled to the tubular member body 402, the holding surface 404d is a pillar portion 428 for the tubular member body 402. (Fig. 18) Surface contact to maintain. Further, the guide portion 474 that protrudes from the outer peripheral surface 404b of the peripheral wall portion 434 has a plate shape extending in the direction of the long-side axis L on the outer peripheral surface 404b, and becomes wider toward the guide surface 472 of the pipe member body 402. The face comes in contact. With the above-described configuration, the tubular member 404 can be attached to the tubular member body 402 in a more stable state.

The tubular window member 404 can be seen from FIGS. 20 and 21 and has a shaft holding portion 444 extending from the peripheral wall portion 434 to the center of the second passage 436. The shaft holding portion 444 has a structure that is held unilaterally unlike the shaft holding portion 244 of the second embodiment shown in Fig. 16 . By this unilaterally held structure, it is easier to clean the inner circumferential surface 404c of the tubular window member 404, and the resistance of the fluid flowing in the flow path 412 is less changed.

As shown in FIG. 22, the tubular window member 404 has a window outer circumferential surface 405a exposed to the outside when assembled in the pipe member body 402, and a second passage 436 defined on the inner side in the radial direction of the outer circumferential surface 405a of the window. The blade inner circumferential surface 405b and the blade member 408 disposed in the second passage 436 are visually viewable through the window outer circumferential surface 405a and the window inner circumferential surface 405b. Further, as shown in FIG. 22, the inner circumferential surface 405b of the window is a part of the inner circumferential surface 404c which is circular in cross section. In the tubular window member 404 of the present embodiment, the window outer circumferential surface 405a having an arc-shaped cross section is formed such that the center of curvature P1 is located between the curvature center P2 of the window inner circumferential surface 405b and the window outer circumferential surface 405a. Therefore, the thickness of the peripheral wall portion 434 in the radial direction is formed to be the thickest at the center portion of the window outer circumferential surface 405a, and is gradually thinned toward the end portion. Moreover, FIG. 22 shows the virtual circle V which passes the circular arc of the outer peripheral surface 405a of a window by the broken line. The lens outer peripheral surface 405a and the inner circumferential surface 405b of the window constitute the lens, and the blade member 408 in the second passage 436 appears to be larger than that of the above embodiment when viewed from the outside. Thereby, the visibility of the blade member 408 is improved. Further, the outer circumferential surface 405a and the inner circumferential surface 405b of the window are not necessarily required to have a circular or circular cross section, and may be a non-arc surface.

The blade member 408 includes a main body portion 442 that constitutes a rotating shaft that is rotatably held by the shaft holding portion 444 of the tubular window member 404, and the first vane 446a and the second vane 446b are disposed The outer peripheral surface 442a of the main body portion 442, and the first fluid resisting portion 447a and the second fluid resisting portion 447b are disposed on the outer peripheral surface 442a between the first and second vanes 446a and 446b. The rotation shaft (body portion) 442 of the blade member 408 has a segment portion 488 that faces the rear end portion 484. In the assembled state of FIG. 21, the segment portion 488 of the rotating shaft 442 abuts or approaches the locking portion 478 of the shaft holding portion 444, and the rear end surface 492 of the rotating shaft 442 is supported by the blade supporting portion 452 of the holding member 406. Thereby, the position in the direction of the rotation center axis C is maintained. In a state where the tubular window member 404 is removed from the pipe member body 402, the blade member 408 is detachable from the tubular window member 404 by being pulled by grasping the side of the end face 492 after the rotation shaft 442 thereof. Alternatively, the front end portion 484 of the rotating shaft 442 protruding forward from the shaft holding portion 444 of the tubular window member 404 is pressed by a hand or a thin rod member or the like, whereby the blade member 408 is removed from the tubular window member 404.

The first and second fluid resisting portions 447a and 447b of the blade member 408 are opposite to each other from the outer peripheral surface 442a of the main body portion 442 along one plane F including the central axis of rotation C as shown in Fig. 24 ( As shown in Fig. 24, the upper and lower sides are respectively protruded, and as shown in Fig. 23, the flat plate shape extending in the direction of the one plane F toward the central axis of rotation C (the left and right direction in Fig. 23) . The first and second blades 446a and 446b are formed so as to be substantially perpendicular to the one plane F from the outer circumferential surface 442a of the main body portion 442 at a position opposite to the one plane F (see FIG. 24). Look at the left and right direction). The first blade 446a is a flat plate shape that linearly extends obliquely to the rotation center axis line C when viewed from the vertical direction (that is, viewed from the direction of FIG. 23). Thereby, the first blade 446a is formed with a surface inclined to the rotation center axis C, and when the fluid flows in the direction of the long axis L (that is, the direction of the rotation center axis C), the fluid is generated in the blade member 408 by the fluid. The force in the direction of rotation. The second blade 446b also has the same shape as the first blade 446a. In the blade member 408, when the fluid flows in the flow path 412, the first and second blades 446a and 446b are rotated about the rotation center axis C by the force in the rotational direction received by the fluid. On the other hand, the first and second fluid-resistance portions 447a and 447b extend in the direction of the rotation center axis C as described above, and do not constitute a surface inclined to the rotation center axis C, so that the blade member 408 is stationary. The first and second fluid resisting portions 447a and 447b do not act on the force in the direction of rotation caused by the fluid. However, when the blade member 408 rotates, the first and second fluid resisting portions 447a and 447b receive a resistance against the rotation direction of the fluid. Therefore, the first and second fluid-resistance portions 447a and 447b cancel a part of the force in which the first and second blades 446a and 446b are subjected to the fluid in the rotational direction, and the blade member 408 is the entire fluid. The resultant force in the direction of rotation is reduced, and the function of suppressing the increase in the rotational speed of the blade member 408 is exhibited. Further, since the fluid resistance is proportional to the square of the relative velocity between the object and the fluid, the first and second fluid resisting portions 447a and 447b are formed by increasing the flow velocity of the flowing fluid and increasing the rotational speed of the blade member 408. The resistance to the fluid will increase. That is, the effect of suppressing the rotation speed by the first and second fluid resistance portions 447a and 447b is that the rotation speed of the blade member 408 is increased as the speed of the blade member 408 is increased. Further, the shapes of the first and second fluid resisting portions 447a and 447b are not necessarily a planar shape, and may be a cylindrical or prismatic shape extending outward in the radial direction, or may be such a column. The direction of the center axis C of rotation is plural and side by side. Further, it is also possible to have a fluid resistance portion only on one side of the rotating shaft 442.

The blade member 408 is a two-color molded member that is resin-molded by a red first resin material and a yellow second resin material. The mold (not shown) for molding the blade member 408 is composed of two molds divided by one plane F shown in Fig. 24 . That is, the formed blade member 408 is detached from the mold in the vertical direction with respect to the one plane F. Here, the blade member 408, in particular, the first and second blades 446a and 446b and the first and second fluid-resistance portions 447a and 447b are not in the direction in which the mold is detached (the left-right direction as viewed in FIG. 24). The shape that will be stuck is easy to release from the mold. In addition, the blade member 408 is formed by injecting a first resin material from a mold corresponding to the first blade 446a, and injecting a second resin material from a mold corresponding to the second blade 446b. Therefore, the formed blade member 408 is defined by the one plane F, and is formed of a red first resin material on the left side viewed from FIG. 24 and a yellow second resin material on the right side. That is, the blade member 408 is a two-color member that is half red and the other half is yellow. As described above, the blade members 408 have different two colors, whereby the rotation of the blade members 408 can be easily visually observed by the change in color. Further, in the present embodiment, it is two colors of red and yellow, but of course, other colors may be combined. Further, as described above, in order to perform the two-color molding of the mold, the mold can be divided into one flat surface F, and the mold can be easily produced by simplifying the cutting of the mold.

As described above, the first and second fluid-resistance portions 447a and 447b of the blade member 408 are mainly provided to suppress an increase in the rotational speed of the blade member 408. However, the tubular window to which the blade member 408 is attached is also burdened. The task of maintaining the posture of the blade member 408 when the member 404 is assembled to the tubular member body 402. That is, in a state where the tubular window member 404 is removed, the rotation shaft 442 of the blade member 408 is in a state of being unilaterally held by the shaft holding portion 444 of the tubular window member 404, so that the blade member 408 is easy to the tubular window member 404. The first and second fluid resisting portions 447a and 447b are disposed between the first and second blades 446a and 446b, and the portions are engaged with the inner circumferential surface 404c of the tubular window member 404. The inclination of the blade member 408 is suppressed. In particular, the blade member 408 of the embodiment has a shape in which the first and second blades 446a and 446b extend only to the left and right and do not extend above and below when viewed in FIG. 24 in order to form the two-color molding member as described above. Therefore, when the first and second fluid resistance portions 447a and 447b are not provided, the blade member 408 is largely inclined upward and downward. When the blade member 408 is largely inclined, when the tubular window member 404 is assembled to the pipe member body 402, the rear end surface 492 of the rotating shaft 442 cannot be fitted into the concave portion 494 of the blade supporting portion 452 (FIG. 21). On the other hand, as described above, the inclination of the blade member 408 to the tubular window member 404 is converged within a predetermined range by the first and second fluid resisting portions 447a and 447b, whereby the rotation axis 442 of the blade member 408 is caused. The rear end surface 492 is appropriately fitted to the conical recess 494 of the holding member 406 for holding. In other words, the inclination of the blade member 408 is suppressed by the first and second fluid resisting portions 447a and 447b, whereby the tubular window member 404 can be easily attached to the state in which the blade member 408 is attached.

In the holding member 406 of the present embodiment, the surface facing the side of the tubular window member 404 of the protruding portion 462 is a sliding engagement surface 462a that slides with the rear end surface 404a of the tubular window member 404, and the sliding engagement surface is formed on the sliding engagement surface The 462a is provided with a flexible portion 463 which is flexible in the direction of the longitudinal axis L. A locking protrusion 466 is formed in the flexible portion 463. The locking projection 466 is received by the locking recess 498 formed in the end surface 404a of the tubular window member 404 in the assembled state, so that the position of the holding member 406 in the rotational direction of the tubular window member 404 is maintained. As shown in FIG. 18, when the locking projection 466 is locked to the locking recess 498 and is in the locking rotation position, the holding member 406 is engaged by the locking projection 466 and the locking recess 498. Suppresses the rotation in the circumferential direction. When the holding member 406 rotates from the locking rotational position to the tubular member body 402 and the tubular window member 404, the locking projection 466 is detached from the locking recess 498, and is formed around the end surface 404a of the tubular window member 404. The inside of the recess 499 moves. The locking projection 466 does not contact the tubular window member 404 when positioned within the surrounding recess 499. Further, the inclined surface 462b is formed on the surface on the rear side of the protruding portion 462, and the protruding portion 462 is difficult to be caught in the receiving recess of the tubular member body 402 when the holding member 406 is rotated from the integrated rotational position to the locked rotational position. 470's corner.

In the pipe member 500 according to the fifth embodiment of the present invention, as shown in FIG. 25, the pipe member 400 of the fourth embodiment differs in the holding form of the blade member 508. Specifically, the front end surface 591 and the rear end surface 592 of the rotating shaft 542 of the blade member 508 are each tapered, and the shaft holding portion 544 of the tubular window member 504 is in the shape of a cover, and further, formed in the blade supporting portion 552 of the holding member 506. There is a conical recess 594. The tapered angle of the front end face 591 of the blade member 508 is an acute angle to the tapered angle of the shaft retaining portion 544 of the tubular window member 504, and the tapered angle of the rear end face 592 of the blade member 508 is also larger than the conical recess of the retaining member 506. The tapered angle of 594 is also an acute angle. Therefore, the front end surface 591 and the rear end surface 592 of the blade member 508 are substantially in contact with the front end portion of the shaft holding portion 544 and the conical recess portion 594, respectively. Thereby, the contact area between the rotating shaft 542 of the blade member 508 and the shaft holding portion 544 and the blade supporting portion 552 is reduced, and the frictional resistance during rotation is reduced.

The pipe member 600 according to the sixth embodiment of the present invention has a structure similar to that of the pipe members 400 and 500 of the fourth and fifth embodiments, as shown in Figs. 26 to 30, but for the pipe member 400. 500 has the following differences.

In the tubular window member 604 of the pipe member 600, a grip portion 675 is formed between the window outer circumferential surface 605a and the guide portion 674. In the fourth embodiment, when the tubular window member 404 is taken out from the pipe member body 402, the tubular window member 404 is pushed out from the rear side. However, when the pipe member 400 is attached to a narrow place, there is a finger. It does not protrude beyond the rear side of the tubular window member 404. In this regard, the tubular member 604 of the tubular member 600 is formed with the above-described grip portion 675. Therefore, even in this situation, the grip portion 675 can be grasped to pull the tubular window member 604, thereby easily opening the tubular window. Member 604 is removed from tube member body 602.

As shown in Fig. 28, the locking projection 666 of the holding member 606 is triangular. Further, the protruding portion 662 of the holding member 606 extends long in the radial direction outer side, so that the operation of the holding member 606 becomes easy.

As shown in FIG. 29, the first and second fluid-resistance portions 647a and 647b of the blade member 608 are long in the direction of the long-side axis L and have a shape close to a rectangle. Thereby, the area of the first and second fluid resisting portions 647a and 647b is increased. Similarly, the first and second blades 646a and 646b also increase the area. Thereby, the visibility of the blade member 608, particularly during rotation, can be enhanced when viewed from the outside of the tubular window member 604. Moreover, the resistance received by the fluid flowing in the flow path 612 becomes large, and the blade member 608 can be rotated even with a small flow rate. Further, a groove 693 is formed in the vicinity of the end surface 692 of the blade member 608. When the blade member 608 is removed from the tubular window member 604, the finger is hooked to the groove 693, whereby the removal of the blade member 608 can be more easily performed. The structure of the shaft holding portion 644 of the tubular window member 604 for holding the rotating shaft 642 of the blade member 608 is similar to that of the tube member 500 of the fifth embodiment shown in Fig. 25, but at the supporting end face 645 of the shaft holding portion 644 The long side axis L is a plane that is substantially perpendicular, which is different. Thereby, the tapered front end face 691 of the blade member 608 is often in point contact with the support end face 645, and the frictional resistance between the front end face 691 and the support end face 645 does not become large as the blade member 608 rotates.

As shown in Fig. 30, the outer peripheral surface 605a of the tubular window member 604 as viewed from the left side is a linear portion 605a-1 extending from the arcuate portion 605a-1 and extending straight therefrom to the retaining surface 604d. The resulting shape is a shape having no depression from the outer circumferential surface 605a to the holding surface 604d. Thereby, when the tubular window member 604 is attached to the pipe member body 602, the tubular window member 604 is not caught in the column portion 628 of the pipe member body 602, and can be smoothly inserted into the pipe member body 602.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments. For example, it is not necessary for the tubular window member to be entirely made of a transparent material. As long as the blade member in the flow path can be visually observed in the state of being assembled to the tubular member body, only a part of the transparent member may be used. As long as the blade member can be visually observed, it may be a non-transparent person who is colored or foggy. Further, as the flow display member for indicating the flow of the fluid in the flow path, other members such as a fluid resistance body that is displaced by the fluid and displaced in the flow direction may be used instead of the blade member. In addition, when the fluid to be used contains the solid matter or bubbles that are observed, it is possible to confirm the presence or absence of the flow of the fluid by observing the above, and therefore it is not necessary to provide a flow display member like a blade member. Further, in the above embodiment, the presence or absence of the flow of the fluid is confirmed by the rotation of the blade member, but the flow rate sensor for measuring the flow rate of the fluid by the rotational speed of the blade member may be used. Further, as a structure for preventing the holding member from being erroneously displaced from the holding position to the liberation position, the screw may be screwed and fixed to the pipe member body by passing the screw through the locking extension portion of the holding member. At this time, the holding member may be fixed by screws after being set at the locking rotation position, and may be fixed by screws at the integrated rotation position.

The configurations of the respective embodiments can be freely combined with each other. For example, the blades of the blade members of the first to third embodiments may have the same shape as the first and second blades of the blade members of the fourth to sixth embodiments. Further, in the first to third embodiments, the blade member may be a two-color molded member, and the first and second fluid resistant portions may be provided. In the fourth to sixth embodiments, the structure for suppressing the rotation of the holding member according to the first and second embodiments is such that the locking projection of the holding member and the locking recess of the tubular window member are also Alternatively, the structures of the first and second embodiments may be applied to the fourth to sixth embodiments. The other components of the respective embodiments can be freely combined with each other in the same manner.

100‧‧‧ pipe components

102‧‧‧ pipe component body

102a‧‧‧ outer perimeter

104‧‧‧Tubular window members

104a‧‧‧ rear end face

104b‧‧‧ outer perimeter

104c‧‧‧ inner circumference

106‧‧‧Retaining components

108‧‧‧blade components

110‧‧‧ Flow Visual Components

112‧‧‧Flow

114‧‧‧Front part

114a‧‧‧ inner circumference

116‧‧‧ rear part

116a‧‧‧ inner circumference

118‧‧‧ middle part

120‧‧‧ front opening

122‧‧‧ Rear opening

124‧‧‧1st pathway

126‧‧‧ Female thread

128‧‧‧ Pillars

130‧‧‧1st side opening

132‧‧‧2nd side opening

134‧‧‧ (of the tubular window member 104) peripheral wall portion

136‧‧‧2nd pathway

138‧‧‧ front end

140‧‧‧Axis support

142‧‧‧Rotary axis

144‧‧‧ shaft holding part (body part)

144a‧‧‧ outer perimeter

144b‧‧‧ inner circumference

146‧‧‧ leaves

148‧‧‧ (holding portion of retaining member 106)

148a‧‧‧ front face

148b‧‧‧ outer perimeter

150‧‧‧3rd pathway

152‧‧‧ blade support

154‧‧‧ (the end of the blade member 108)

156‧‧‧ (retaining member 106) rear end

Front end of 158‧‧‧ (holding member 106)

160‧‧‧ (the end of the tubular window member 104)

162‧‧‧ burr

164‧‧‧Card extension

166‧‧‧through holes

168‧‧‧ balls

170‧‧‧ receiving recess

172‧‧‧ Guide surface

174‧‧‧Guidance

176‧‧‧ (rear axis 142) rear end

178‧‧‧1st stop

180‧‧‧slit

182‧‧‧2nd carding

184‧‧‧ (front end of blade member 108)

200‧‧‧ pipe components

202‧‧‧ tube component body

204‧‧‧Tubular window members

204a‧‧‧ rear end face

204c‧‧‧ inner circumference

206‧‧‧Retaining components

208‧‧‧blade components

210‧‧‧ Flow Visual Components

234‧‧‧Walls

242‧‧‧Rotary shaft (body part)

244‧‧‧Axis retention department

244b‧‧‧ inner circumference

252‧‧‧ blade support

278‧‧‧1st stop

282‧‧‧2nd carding

284‧‧‧ front end

288‧‧ Section

290‧‧‧ (back end of shaft holding portion 244)

292‧‧‧ (rear axis 242) rear end face

294‧‧‧Conical recess

300‧‧‧ pipe components

302‧‧‧ tube component body

302a‧‧‧ outer perimeter

306‧‧‧Retaining components

362‧‧‧ burr

396‧‧‧Locking members

400‧‧‧ pipe components

402‧‧‧Tubing component body

404‧‧‧Tubular window members

404a‧‧‧ rear end face

404b‧‧‧ outer perimeter

404c‧‧‧ inner circumference

404d‧‧‧ Keep face

405a‧‧ ‧ outside the window

405b‧‧‧The perimeter of the window

406‧‧‧ Keeping components

408‧‧‧blade components

412‧‧‧flow path

428‧‧‧ Pillars

434‧‧‧Walls

436‧‧‧2nd pathway

438‧‧‧ front end

442‧‧‧Rotary shaft (body part)

442a‧‧‧ outer perimeter

444‧‧‧Axis retention department

446a‧‧‧1st blade

446b‧‧‧2nd blade

447a‧‧‧1st Fluid Resistance Department

447b‧‧‧2nd Fluid Resistance Department

452‧‧‧ blade support

460‧‧‧ back end

462‧‧‧ burr

462a‧‧‧Sliding engagement surface

462b‧‧‧ sloped surface

463‧‧‧Flexible

466‧‧‧Snap protrusion

470‧‧‧ receiving recess

472‧‧‧ Guide surface

474‧‧‧Guide

478‧‧‧Card

484‧‧‧ front end

488‧‧‧ Section

492‧‧‧ rear end face

494‧‧‧ recess

498‧‧‧Card recess

499‧‧‧ surrounding recess

500‧‧‧ pipe components

504‧‧‧Tubular window members

506‧‧‧ Keeping components

508‧‧‧blade components

542‧‧‧Rotary axis

544‧‧‧Axis retention department

552‧‧‧ blade support

591‧‧‧ front end

592‧‧‧ rear end face

594‧‧‧Conical recess

600‧‧‧ pipe components

602‧‧‧ pipe component body

604‧‧‧Tubular window members

604d‧‧‧ Keep face

605a‧‧ ‧ outside the window

605a-1‧‧‧ arc-shaped part

605a-2‧‧‧Linear

606‧‧‧ Keeping components

608‧‧‧blade components

612‧‧‧Flow

628‧‧‧ Pillars

642‧‧‧Rotary axis

644‧‧‧Axis retention department

645‧‧‧Support end face

646a‧‧‧1st blade

646b‧‧‧2nd blade

647a‧‧1st Fluid Resistance Department

647b‧‧‧2nd Fluid Resistance Department

662‧‧‧ burr

666‧‧‧locking protrusion

674‧‧‧Guide

675‧‧‧Control Department

691‧‧‧ front face

692‧‧‧ rear end face

693‧‧‧ditch

L‧‧‧ long axis

C‧‧‧Rotation center axis

P1‧‧‧ Curvature Center

P2‧‧‧ Curvature Center

V‧‧‧ virtual circle

F‧‧1 plane

Fig. 1 is a perspective view showing an assembled state of a pipe member according to a first embodiment of the present invention. Figure 2 is an exploded perspective view of the pipe member of Figure 1. Figure 3 is a top plan view of the tubular member of Figure 1. Figure 4 is a side elevational view of the tubular member of Figure 1. Figure 5 is a cross-sectional view taken along line V-V of Figure 3; Figure 6 is a cross-sectional view taken along line VI-VI of Figure 4; Fig. 7 is a first view showing the attachment and detachment operation of the tubular window member of the pipe member of Fig. 1, and is a view showing a state in which the holding member is positioned at the integrated rotational position. Fig. 8 is a second view showing the attachment and detachment operation of the tubular window member of the pipe member of Fig. 1, and is a view showing a state in which the holding member is in a liberated position. Fig. 9 is a third view showing the attachment and detachment operation of the tubular window member of the pipe member of Fig. 1, and is a view showing a state in which the tubular window member is in the communication release position. Fig. 10 is a view showing a mounting and detaching operation of the tubular window member of the pipe member of Fig. 1 and showing a state in which the tubular window member is removed from the pipe member body. Fig. 11 is a view showing a mounting and detaching operation of the tubular window member of the pipe member of Fig. 1 and showing a state in which the holding member is removed from the pipe member body. Fig. 12 is a view showing a mounting and detaching operation of the tubular window member of the pipe member of Fig. 1 and showing a state in which the holding member is removed from the pipe member body. Fig. 13 is a cross-sectional view of the fluid visual member, showing a state in which the blade member is removed from the pipe member and the blade member is positioned at the second position. Fig. 14 is a view showing the flow visual member of Fig. 13 in a state in which the blade member is removed from the tubular window member. Figure 15 is a cross-sectional view taken along line XV-XV of Figure 10. Fig. 16 is a side sectional view showing a pipe member according to a second embodiment of the present invention. Fig. 17 is a perspective view of a pipe member according to a third embodiment of the present invention. Fig. 18 is a perspective view of a pipe member according to a fourth embodiment of the present invention. Figure 19 is an exploded perspective view of the tubular window member and the blade member and the retaining member of the tubular member of Figure 18. Figure 20 is an exploded perspective view of the tubular window member and the blade member and the retaining member of Figure 19 as viewed from different directions. Figure 21 is a side cross-sectional view of the tube member of Figure 18. Figure 22 is a cross-sectional view of the pipe member body of the pipe member of Figure 18. Figure 23 is a side elevational view of the blade member of the tubular member of Figure 18. Figure 24 is a front elevational view of the blade member of Figure 23. Fig. 25 is a side sectional view showing a pipe member according to a fifth embodiment of the present invention. Fig. 26 is a perspective view of a pipe member according to a sixth embodiment of the present invention. Figure 27 is an exploded perspective view of the tubular window member and the blade member and the retaining member of the pipe member of Figure 26 . Figure 28 is an exploded perspective view of the tubular window member and the blade member and the retaining member of Figure 27 as viewed from different directions. Figure 29 is a side cross-sectional view of the tube member of Figure 26. Figure 30 is a cross-sectional view of the pipe member body of the pipe member of Figure 26.

Claims (14)

A pipe member is a pipe member that is assembled between a fluid pipe member and constitutes a part of a fluid pipe, and includes: a pipe member body that is a pipe member body that defines a first passage, and has a long-side axis for the first passage a side opening portion that communicates with the opening of the first passage from the side; the tubular window member is a tubular window member that is assembled to the tubular member body through the side opening portion, and has a tubular window member that is assembled to the tubular member body a second passage that communicates with the first passage to form a flow path of the pipe member, and at least a part of which is made of a transparent material, and the inside of the flow path can be visually observed by at least a part thereof; and the holding member is attached to the pipe member a retaining member of the body that is displaceable between: a retaining position that is engaged with the tubular window member to assemble the tubular window member to the tubular member body, and is separated from the tubular window member to be released The detachment of the tubular window member allows the tubular window member to be removed from the tubular member body through the lateral opening. The pipe member according to claim 1, wherein the holding member is slidably assembled to the pipe member body in a direction of the long-side axis between the holding position and the liberating position, the tubular window member being In a state in which the holding member is located at the liberation position, the first member can be displaced between the assembly position of the tube member body and the direction of the longitudinal axis from the assembly position to release the first passage and The tubular window member can be removed from the pipe member body through the side opening portion at the communication release position at the communication release position where the second passage communicates. The pipe member according to claim 2, wherein the pipe member body has a cylindrical front portion and a rear portion, and an intermediate portion between the front portion and the rear portion, the side opening portion being formed at In the intermediate portion, the tubular window member is integrated with the tubular member body in the direction of the longitudinal axis at the assembly position, and is sealingly engaged with the front portion. The holding member is a tubular shape having a third passage. The member is sealed and engaged with the tubular window member and the rear portion at the holding position, and the third passage forms the flow path of the tubular member together with the first passage and the second passage. The pipe member according to claim 2 or 3, wherein the holding member is detachable from the pipe member body through the side opening portion in a state where the tubular window member is removed from the pipe member body. The pipe member according to claim 2, wherein the holding member has a protruding portion that protrudes outward in the radial direction from an outer peripheral surface of the holding member, and the tubular member body has a receiving recess that receives the protruding portion. The holding member, when in the holding position, is rotatable about the longitudinal axis about the tubular member body, in an integrated rotational position when the protruding portion is integrated with the receiving recess in the direction of the long axis The protruding portion can be displaced to the liberation position while being received by the receiving concave portion, and the protruding portion can interfere with the tubular member body without being displaced to the liberation position when the integrated rotational position is not present. The pipe member according to claim 5, wherein the projecting portion has a locking projection extending along an outer circumferential surface of the pipe member body, and an outer circumferential surface of the pipe member body and a surface facing the outer circumferential surface One of the inner side surfaces of the locking extension portion is provided with a locking projection, and the other is provided with a locking concave portion. When the holding member is rotated from the integrated rotational position to the locking rotational position, the card is inserted. The stopper projection engages with the locking recess to suppress the rotation of the holding member. The tubular member according to claim 5, wherein the protruding portion has a locking projection on a sliding engagement surface that is slidingly engaged with the tubular window member, the tubular window member having a card receiving the locking projection In the recessed portion, when the holding member is rotated from the integrated rotational position to the locked rotational position, the locking projection engages with the locking recess to suppress rotation of the holding member. The pipe member according to claim 7, wherein the sliding engagement surface of the holding member is provided with a flexible portion having flexibility in a direction of the long axis, and the locking protrusion is provided at the Flexible section. The pipe member according to claim 2 or 3, wherein the pipe member body has a guide surface formed at a side edge of the side opening portion and extending in a direction of the long axis, the tubular window member having the same a guide portion that protrudes outward in the radial direction from the outer peripheral surface of the tubular window member, and when the tubular window member is inserted into the first passage from the side opening and is positioned at the communication release position, the guide portion is brought into contact with The guiding surface causes the tubular window member to be integrated with the tubular member body in the direction of the longitudinal axis, and the guiding portion is caused to be displaced when the tubular window member is displaced from the communication releasing position to the assembled position Slide on the guide surface. The pipe member according to any one of claims 1 to 3, further comprising: a flow display member disposed in the second passage of the tubular window member and displaced by a fluid flowing in the flow path . The pipe member according to claim 10, wherein the flow display member is a blade member mounted on the tubular window member to be rotatable in the circumferential direction of the long axis, and the tubular member can be with the tubular member from the tube The component body is removed. The tubular member according to any one of claims 1 to 3, wherein the tubular window member has a window outer peripheral surface exposed to the outside when assembled to the tubular member body, and a radial direction of the outer peripheral surface of the window In the inner peripheral surface of the inner window, the inside of the second passage is visible through the outer peripheral surface of the window and the inner peripheral surface of the window, and the outer peripheral surface of the window is shaped such that the center of curvature of the outer peripheral surface of the window is located in the window The position between the center of curvature of the circumference and the outer circumference of the window. The pipe member according to claim 12, wherein each of the outer circumferential surface of the window and the inner circumferential surface of the window has an arc shape. The pipe member according to any one of claims 1 to 3, wherein the side opening portion has first and second side opening portions formed at opposite positions in a radial direction of the first passage. The tubular window member can be attached to the tubular member body regardless of whether it passes through either of the first and second side opening portions.