JP2018054134A - Ventilation hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation hood which can be fixed firmly without damaging a wall surface.SOLUTION: A ventilation hood includes a locking member so as to be provided in a duct and a cover. The locking member is constituted by a receiving part, a rotation restriction part and a falling restriction part, and it includes a fixing structure which can be fixed to the duct. The ventilation hood includes a cylindrical part which can be inserted into/removed from the duct, and a falling prevention part which restricts movement in a falling direction by protruding from an outer peripheral wall of the cylindrical part and being engaged with the locking member. With this constitution of the ventilation hood, when fixing the ventilation hood to the wall, the falling prevention part is pressed by an inner peripheral wall of the duct and the outer peripheral wall of the cylindrical part of the ventilation hood, and the ventilation hood is suppressed to move easily. As the locking member is engaged with the falling prevention part, the ventilation hood can be prevented from falling from the duct with respect to the force in the falling direction, so that the ventilation hood can be fixed by a firm method without using screws.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ventilation hood installed on an outer wall or an inner wall of a building.

Conventionally, a ventilation port member is known as this kind of ventilation hood (for example, refer to patent documents 1).
Hereinafter, the ventilation port member will be described with reference to FIG.

  As shown in FIG. 16, the conventional ventilation port member includes a main body cylinder 101 to be inserted into a duct provided in an outer wall of a building, a retaining metal fitting 102 provided in the main body cylinder 101, and a main body cylinder 101. In the ventilation hood composed of the hood body 103 to be connected, the hood flange portion 104 in contact with the wall surface is provided with a plurality of half-cut holes 105, and the construction method can be attached to the outer wall with the screws 106 through the half-cut holes 105. .

JP-A-8-303830 (paragraph 0009, FIG. 1)

Such a conventional ventilation port member, that is, a ventilation hood, requires screwing for fixing to a wall. That is, depending on the material of the wall, if the screw is directly struck into the wall, the wall is cracked. Therefore, the screw is fixed to the wall after the pilot hole is made in the wall. Thus, when fixing a ventilation port member, the subject that a wall was damaged occurred.

  Then, this invention solves the said conventional subject, and it aims at providing the ventilation hood which can be fixed without damaging a wall.

  In order to achieve this object, the present invention provides a ventilation hood comprising a locking member provided in a hollow cylindrical duct and a cover engaged with the locking member. The stop member includes a receiving portion having a ring shape, a rotation restricting portion that protrudes in a direction parallel to a center axis of the ring shape from an opening end portion of the receiving portion, and a protruding tip portion of the rotation restricting portion to the ring. A slip-out restricting portion that projects in a key shape in the circumferential direction in the shape, and a fixing structure that can be fixed to the inner peripheral wall of the duct, and the cover is a cylindrical portion that can be inserted and removed on the inner peripheral side of the duct; The ventilating hood is provided with a retaining portion that protrudes from the outer peripheral wall of the cylindrical portion and engages with the locking member to restrict movement of the cylindrical portion in the removal direction. To achieve this goal.

  ADVANTAGE OF THE INVENTION According to this invention, the ventilation hood which can be fixed without damaging a wall can be provided.

The perspective view which shows the structure of the ventilation hood which concerns on Embodiment 1 of this invention. Sectional drawing which shows the structure of the ventilation hood which concerns on Embodiment 1. FIG. The fragmentary sectional view which shows the latching positional relationship of the duct which concerns on Embodiment 1, a latching member, and a retaining part. Sectional drawing which shows the fixed state of the ventilation hood which concerns on Embodiment 1. FIG. The perspective view which shows the insertion state to the duct of the latching member which concerns on Embodiment 1. FIG. The front view which shows the change of the state attitude | position of the ventilation hood which concerns on Embodiment 1. FIG. FIG. 3 is a perspective view illustrating a configuration of a locking member according to the first embodiment. The perspective view which shows the insertion state to the duct of the latching member which concerns on Embodiment 2 of invention. The perspective view which shows the insertion state to the duct of the latching member which concerns on Embodiment 3 of invention. The perspective view which shows the insertion state to the duct of the latching member which concerns on Embodiment 4 of invention. The perspective view which shows the state after insertion to the duct of the latching member which concerns on Embodiment 4 of invention. The figure which shows the shape of the securing part which concerns on Embodiment 5 of invention. Sectional drawing which shows the state of the securing part and locking member which concern on Embodiment 5 of invention. The figure which shows the other shape of the securing part which concerns on Embodiment 5 of invention. The perspective view which shows the correlation of the securing part and latching member which concerns on Embodiment 5 of invention. The figure which shows the structure of the conventional ventilation hood.

  A ventilation hood according to the present invention is a ventilation hood provided with a locking member provided in a hollow cylindrical duct and a cover engaged with the locking member, and the locking member has a ring shape. A receiving portion having an opening, a rotation restricting portion protruding in a direction parallel to the center axis of the ring shape from the opening end of the receiving portion, and a protrusion protruding in a key shape in the circumferential direction in the ring shape from the protruding tip portion of the rotation restricting portion The cover includes a restricting portion and a fixing structure that can be fixed to the inner peripheral wall of the duct. The cover protrudes from the outer peripheral wall of the cylindrical portion and engages with the locking member. Thus, a configuration of a ventilation hood provided with a retaining portion that restricts movement of the cylindrical portion in the removal direction is provided.

  Thereby, when fixing a cover to the wall in which a duct is installed, the retaining part which protruded from the outer peripheral wall of a cylindrical part presses the inner peripheral wall of a duct, and suppresses that a cover moves easily. Further, when the cover is inserted into the duct so that one side of the retaining portion is substantially in contact with the pivoting restricting portion of the locking member by the rotation restricting portion of the locking member, the retaining portion further moves in the rotational direction. Since it can suppress turning, it can suppress that a cover moves to a rotation direction easily.

  Further, since the retaining portion is structured to be latched by the retaining member detachment restricting portion, the cover can be prevented from being detached from the duct. That is, the effect that the cover can be fixed to the wall without damaging the wall can be obtained.

  Further, the cylindrical portion is provided with a rotating structure capable of rotating in the circumferential direction when inserted into the duct, and in the insertion / extraction of the cylindrical portion into the duct, the removal restricting portion and the retaining portion are different on the circumference. The cylindrical portion is fixed to the duct at the same position on the circumference of the retaining portion and the retaining portion by rotating the cylindrical portion in the insertion state of the cylindrical portion in the duct. You may make the structure arrange | positioned and performed in a control position.

  With this configuration, when fixing the cover to the wall on which the duct is installed, the cover is inserted into the duct at a position where the cover retaining portion and the retaining member of the duct locking member are different on the circumference. The retaining portion and the slip-out restricting portion are rotated and installed on the wall so as to be at the same position on the circumference.

  As a result, the retaining portion of the cylindrical portion comes into contact with the locking-out restricting portion of the locking member and is in a locked state, so that the cylindrical portion and the duct are fixed, and the blocking portion is in contact with the locking member. It will be in the state located inside. Even if some external force is applied to the cover in this state, that is, a force in the direction in which the cover is removed (away from the wall) is applied, the retaining portion of the cover is locked by the locking member in the duct. Can be prevented from coming off the wall. Any rotating structure may be used. For example, by inserting a cylindrical portion of the same cylindrical shape into the inner periphery of the cylindrical duct, it is possible to rotate in the circumferential direction, that is, the rotating structure is configured.

  Further, the removal restricting portion restricts the movement of the retaining portion in the removal direction from the restriction position, and the rotation restricting portion restricts the rotation of the retaining portion in the turning direction from the restriction position. May be.

  With this configuration, after the cover is inserted into the duct to which the locking member is fixed, even if some external force is applied to the cover, that is, even if a force in the direction of removing the cover (away from the wall) is applied, the cover retaining portion Since it is in a state of being engaged with the removal restricting portion, the movement of the cover in the removal direction is suppressed.

  In addition, the operation to make the position where the retaining portion and the locking member are locked (the same position on the circumference) is performed by the rotation restricting portion of the locking member during the operation of rotating the cover. Since the retaining portion comes into contact, the operator feels that the retaining portion and the locking member are on the circumference that is the condition that the retaining portion and the locking member are locked. It can be seen that That is, it can be easily recognized that it is located at the restriction position, and the operation can be stabilized.

  Further, the receiving portion may be configured to have a C shape in which a part of the ring shape is cut out.

  As a result, when the locking member is inserted into the duct, the outer diameter of the locking member can be changed by the cutout portion to be small or large due to the elasticity obtained by making it C-shaped. With this configuration, even if the inner diameter of the duct differs by several millimeters, the outer diameter of the locking member can be changed according to the inner diameter of the duct, and the locking member can be fixed to the duct. In this manner, the locking member can be fixed even with different duct inner diameters.

  Further, the fixed structure may be configured such that the outer periphery in the C shape is larger than the inner diameter of the duct, and the outer periphery in the C shape biases the inner peripheral wall of the duct toward the outer peripheral side.

  With this configuration, when the locking member is fixed to the duct, the locking member is inserted with the outer diameter of the locking member slightly smaller than the inner diameter of the duct when the locking member is inserted into the duct. And after insertion, since the force which always spreads by the restoring force of the outer diameter of the locking member, the locking member can be urged and fixed to the inner peripheral wall of the duct by the restoring force.

  Further, the fixing structure has a configuration in which an outer peripheral wall in a ring shape is provided with a protruding portion that protrudes to the outer peripheral side.

  With this configuration, the locking member is fixed to the duct when the locking member is inserted into the duct with the outer diameter of the locking member being slightly smaller than the inner diameter of the duct. Then, a force is applied to the locking member in the direction of the inner peripheral wall side of the duct so that the protrusion after insertion bites into the inner peripheral wall of the duct. In this way, the locking member can be fixed to the duct.

  The fixing structure has a configuration in which an adhesive portion is provided on the outer peripheral wall of the ring shape.

  With this adhesive portion, the locking member can be easily fixed to the duct.

  In addition, the retaining portion is a cylindrical fixing portion that is fixed to the cylindrical portion on the front side in the insertion direction of the cylindrical portion, and a return that rises from the cylindrical portion to the outer peripheral side of the cylindrical fixing portion on the rear side in the insertion direction of the cylindrical portion. The return portion may be configured to engage with the locking portion.

  Thus, when the cylindrical portion is inserted into the duct, the tip of the return portion is inserted while being in contact with the inner peripheral wall of the duct. In the natural state, i.e., when the cylindrical part is not inserted into the duct, the return part extends outside the inner diameter of the duct, so that the return part is pressed by the inner peripheral wall of the duct and the outer periphery of the cylindrical part of the ventilation hood. Suppresses easy movement of the cylindrical part.

  Since the engagement of the locking member and the return portion of the retaining portion can prevent the cover from coming out of the duct, the cover can be fixed to the wall by a strong method similar to the screw without using a screw. Furthermore, even if the inner diameters of the ducts are different, the return portion is pressed by the inner peripheral wall of the duct, so that the same effect can be obtained.

  Further, the retaining portion may include a wedge portion that suppresses the movement of the cylindrical portion in the removal direction as compared with the movement of the cylindrical portion in the insertion direction.

  With this configuration, even if a force is applied to the cylindrical portion of the cover in the removal direction, the wedge portion is caught by the inner peripheral wall of the duct, so that the cover can be prevented from moving in the removal direction. Further, although the wedge portion is caught by the inner peripheral wall of the duct, when the cylindrical portion of the cover is inserted into the duct, the wedge portion can be inserted without requiring a relatively large force because the catching force of the wedge portion on the duct inner peripheral wall is small.

  Further, the retaining portion may be configured such that the return portion includes a wedge portion that suppresses movement of the cylindrical portion in the removal direction as compared to movement of the cylindrical portion in the insertion direction.

  With this configuration, the wedge portion provided on the return portion can be hooked on the inner wall of the duct even if the inner diameter of the duct is several millimeters different, and the same effect can be obtained.

  Further, the wedge portion may further be configured to suppress the rotation of the cylindrical portion in the counter-rotating direction compared to the rotation of the cylindrical portion in the rotating direction.

  With this configuration, even if force is applied to the cylindrical portion of the ventilation hood in the counter-rotating direction, the wedge portion is caught on the circumferential wall of the duct, so that the movement of the ventilation hood in the counter-rotating direction can be suppressed. . In addition, after inserting the cylindrical part of the ventilation hood into the duct in the insertion direction, when the cylindrical part is further rotated in the rotation direction, the wedge part has little catching force on the inner peripheral wall of the duct, and a relatively large force is required. It can be turned without stopping.

  Further, a plurality of retaining portions may be provided in the cylindrical portion.

  As a result, the force that suppresses the movement of the ventilation hood by being pushed by the inner peripheral wall of the duct and the outer periphery of the cylindrical portion of the ventilation hood increases by a factor of the number of the prevention parts. Can be fixed.

  Further, the retaining portion may be configured to be provided at equal intervals in the cylindrical portion.

  Thereby, the force which suppresses that a retaining part is pressed by the inner peripheral wall of a duct and the cylindrical part outer periphery of a ventilation hood, and a ventilation hood moves easily is applied equally from any direction of the circumferential direction of a ventilation hood. For this reason, it is possible to suppress an unstable state of being easy to move with respect to a force from a specific direction, and to always work with a constant force when rotating the ventilation hood.

  Further, the retaining portion may have a configuration in which a plurality of retaining portions are provided corresponding to the plurality of rotation restricting portions and the disengaging restricting portions in the cylindrical portion.

  With this configuration, even if a force is applied in the direction in which the ventilation hood is removed from the duct (the direction in which the cylindrical portion is in the counter-rotating direction, the direction in which the cylindrical portion is in the removal direction), By the resultant force, the ventilation hood can be fixed to the wall more firmly.

  Further, the fixing structure may be a through-hole penetrating from the inner peripheral wall to the outer peripheral wall of the locking member.

  With this configuration of the locking member, the locking member can be fixed to the duct by providing a protrusion that fits into the through hole at a position overlapping the through hole of the locking member on the inner peripheral wall of the duct. When inserted into the duct, the protrusion on the inner peripheral wall and the through hole of the locking member are fitted together, and the locking member and the duct can be fixed.

  In addition, the fixing structure has a configuration in which an engagement groove that engages with a stopper provided at the end of the duct is provided at the end opposite to the receiving portion of the removal restricting portion.

  With this configuration of the locking member, the locking member is fixed to the duct in such a way that when the locking member is inserted into the duct, the stopper at the end of the duct and the engagement groove between the locking member are located at the same position on the circumference. When the insertion is completed and the locking member is inserted into the duct, the stopper and the fitting groove are locked.

  As a result, the locking member is not pulled out even when a force in the pulling direction is applied, and the locking member and the duct can be fixed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. In addition, throughout the drawings, the same portions are denoted by the same reference numerals, and the second and subsequent descriptions are omitted. Furthermore, in each drawing, the description of the details of each part not directly related to the present invention is omitted. In addition, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Only. The following plurality of embodiments can be implemented in combination within a consistent range. (Embodiment 1)
Hereinafter, the ventilation hood according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. 1 is a perspective view showing the configuration of the ventilation hood 4 according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view showing the configuration of the ventilation hood, and FIG. 3 shows the duct, the locking member, and the retaining portion. FIG. 4 is a cross-sectional view showing a fixed state of the ventilation hood.

  As shown in FIGS. 1 and 2, the ventilation hood 4 includes a locking member 6 and a cover 3, and is arranged in the duct 1.

  As shown in FIG. 2, the duct 1 is provided, for example, in a hole 31 penetrating the wall 10 such as a house so that the inside and the outside communicate with each other with the wall 10 interposed therebetween. The duct 1 has a hollow cylindrical shape. When the duct 1 is installed on the wall 10, the outer peripheral wall 32 is tightly held between the holes 31, and the inner peripheral wall 5 constitutes the outer periphery of the air passage space for blowing air. When the duct 1 is installed, for example, the end opening 2 that is an opening at the end of the duct 1 is positioned on the same plane as the wall surface 33 of the wall 10.

  The locking member 6 can be inserted into the duct 1. The locking member 6 has a ring-shaped receiving portion 40 and a rotation restriction that protrudes in a direction parallel to the center axis X of the ring shape from the opening end 41 of the receiving portion 40 on the opening side of the duct 1. The part 12, a drop-out restricting part 11 that projects in a key shape in the circumferential direction M in the ring shape from the projecting tip 42 of the rotation restricting part 12, and a fixing structure that can be fixed to the inner peripheral wall 5 of the duct 1. Here, in the present embodiment, the circumferential direction M is a clockwise direction when viewed from the rear in the insertion direction of the receiving portion 40 into the duct 1.

  Three key-like portions 43 constituted by the rotation restricting portion 12 and the drop restricting portion 11 of the locking member 6 are arranged on the same circumference at equal intervals, that is, every 120 degrees. However, the number of the key-shaped part 43 may be one. The angle α formed between the circumferential ends of the rotation restricting portion 12 and the central axis is, for example, about 5 degrees to 60 degrees (first stage right diagram in FIG. 3). The locking member 6 has a thickness of about 1 mm, for example. The other end of the locking member 6 is located at a certain distance from the end opening 2 of the duct 1 in the inner direction of the duct 1 (the insertion direction described later). Here, the fixed distance is a distance having a specific relationship with a later-described retaining portion, but details will be described later.

  The cover 3 includes a cylindrical portion 7 and a duct cover portion 34.

  The cylindrical portion 7 has a hollow cylindrical shape, and an outer periphery of the cylindrical portion 7 is an inner circumferential circle formed by inner circumferential surfaces of a plurality of key-like portions 43 of the locking member 6 (an inner circumferential circle in FIG. 35), that is, the cylindrical portion 7 can be inserted into and removed from the duct 1 after the locking member 6 is inserted into the duct 1. The cylindrical portion 7 has a flange 37 that extends in the outer peripheral direction at the duct cover side opening 36. The cylindrical portion 7 includes a retaining portion 9 on the outer periphery.

  As shown in FIG. 2 and FIG. 4, the retaining portion 9 protrudes from the outer peripheral wall 8 of the cylindrical portion 7 in the outer peripheral direction, and engages with the locking member 6 at the time of installation to move in the removal direction J of the cylindrical portion 7. Regulate the movement of The retaining portions 9 are provided in the same number as the key-shaped portions 43 and corresponding to the positions of the key-shaped portions 43. The retaining portion 9 includes a cylindrical fixing portion 16 that is fixed to the cylindrical portion 7 on the front side 15 in the direction in which the cover 3 is inserted into the duct 1, that is, the insertion direction R, and the cylindrical portion 7 on the rear side 17 in the insertion direction R. To the cylindrical fixing portion 16 and a return portion 18 that rises to the outer peripheral side.

  The details of the engagement between the retaining portion 9 and the locking member 6 will be described later.

  In the state in which the cylindrical portion 7 is not inserted into the duct 1, the return portion 18 has a larger diameter than the inner diameter of the duct 1, as shown in FIG. It extends beyond the inner diameter of 1. That is, even if the inner diameter of the duct 1 is different by several millimeters, the tip of the return portion 18 always comes into contact with the inner peripheral wall 5.

  The duct cover part 34 is integrated with the cylindrical part 7 by, for example, riveting to the flange 37 of the cylindrical part 7. The duct cover part 34 is a hollow rectangle in a sectional view, and one end communicates with the internal space of the cylindrical part 7 and the other end is open to the outside. Here, the outside means outdoors or indoors. In FIG. 4, the duct cover part 34 has a structure in which the other end is opened downward, and rain can be prevented from entering. That is, the duct cover part 34 functions as a cover that prevents inflow of rain and wind into the duct 1.

  The above is the configuration of the ventilation hood 4.

  Next, a method of inserting the locking member 6 into the duct 1 and then inserting the cover 3 into the duct 1, that is, a procedure for setting the installation state will be described with reference to FIGS. 5 is a perspective view showing a state in which the locking member is inserted into the duct, FIG. 6 is a front view showing a change in the state and orientation of the ventilation hood, and FIG. 7 is a perspective view showing a configuration of the locking member.

  In the above configuration, when fixing the cover 3 to the wall 10 on which the duct 1 is installed, first, the center axis X of the locking member 6 and the center axis of the duct 1 are made to coincide with each other, as shown in FIG. Next, the locking member 6 is inserted into the duct 1 so that the end portion 44 is flush with the wall surface 33, that is, substantially coincides with the end opening 2, and is fixed to the inner peripheral wall 5 of the duct 1. This position is a normal position in the construction of the locking member 6 and the duct 1. In addition, the detail of the fixing method of the locking member 6 and the duct 1 is mentioned later. Next (see FIG. 2), the central axis of the cylindrical portion 7 and the central axis of the duct 1 are matched. At this time, the retaining portion 9 provided in the cylindrical portion 7 and the slip-out restricting portion of the locking member 6 disposed in the duct 1 are set at different positions on the cross section perpendicular to the central axis, that is, on the circumference ( The figure of the 2nd step in FIG. 3). In such a state, the cylindrical portion 7 is inserted in the insertion direction R as shown in FIG. At this time, the retaining portion 9 (return portion 18) is pressed by the inner peripheral wall 5 of the duct 1 and the outer peripheral wall 8 of the cylindrical portion 7 of the cover 3 to suppress the cover 3 from easily moving in the removal direction J side ( (See FIG. 4).

  When the cylindrical portion 7 is inserted into the duct 1, the duct cover portion 34 or the flange 37 comes into contact with the wall surface 33 or the end opening 2, and further insertion is restricted. In this state, the end portion on the rear side 17 in the insertion direction R of the return portion 18 is inserted to a position 38 that does not compete with the other end of the locking member 6 in the circumferential direction. That is, this non-competing position 38 is the above-mentioned “distance having a specific relationship with the retaining portion”.

  The retaining portion 9 (return portion 18) and the locking member 6 do not compete in the circumferential direction, the cylindrical portion 7 and the duct 1 are both circular, and the outer periphery of the cylindrical portion 7 is the locking member. Since the diameter is smaller than the inner circumference (the inner circumference side end portion of the locking member 6), the cylindrical portion 7 is rotatable in the duct 1 (rotation structure: the left side of the third stage in FIG. 3). ).

  In this state, by rotating the cylindrical portion 7 in the circumferential direction M, that is, in the rotational direction K, the drop-out restricting portion 11 and the retaining portion 9 are arranged at the same position on the circumference, that is, the restricting position (see FIG. 3 is a diagram on the right side of the third stage in FIG. 3).

  As described above, the engaging member 6 fixed to the duct 1 and the retaining portion 9 of the cover 3 are engaged, so that even if a force in the removal direction J is applied to the cover 3, the cover 1 can be removed from the duct 1. Can be prevented. For this reason, the cover 3 can be fixed to the wall 10 without using a screw.

  In addition, since fixing does not require a screw, when the cover 3 is fixed, a tool such as a screwdriver is not required, so that construction can be easily performed (see FIG. 4).

  Further, the return portion 18 of the retaining portion 9 is pressed by the inner peripheral wall 5 of the duct 1 and the outer periphery of the cylindrical portion 7, and suppresses easy movement of the cylindrical portion 7. For example, if the retaining portion 9 has an elastic force such as spring steel, a stronger pressing force is applied to the retaining portion 9 and a strong holding force can be obtained. Further, even if the duct has a slightly different inner diameter, the return portion 18 is pressed by the inner peripheral wall 5 of the duct 1, so that the cylindrical portion 7 is fixed to the duct having a different diameter by absorbing the difference in the inner diameter. (See FIG. 4).

  Further, although the retaining portion 9 and the key-shaped portion 43 each function as a pair, even if a force is applied to the removal direction J of the cylindrical portion 7 by providing a plurality, the plurality of retaining portions 9 and the locking member 6 are provided. The cylindrical portion 7 can be more firmly fixed to the wall by the engaging force.

  6 shows a state in which the duct cover portion 34 is inserted into the duct 1 at different positions on the circumference of the locking member 6 and the retaining portion 9. 6 shows a state in which the duct cover portion 34 is rotated so that the locking member 6 and the retaining portion 9 are in the same position on the circumference. Since the duct cover portion 34 can have various shapes, the outer periphery of the duct cover portion 34 indicates the inclination of the duct cover portion 34.

  In this manner, at least one of the removal restricting portions 11 of the locking member 6 is positioned on the upper part on the circumference. And also in the duct cover part 34, the securing part 9 is located in the upper part in the normal position after arrangement | positioning. As a result, whether or not the duct cover portion 34 has been rotated after being inserted can be confirmed by the correct posture of the cover 3 (duct cover portion 34). Easy to confirm.

  The retaining portion 9 may be configured integrally with the cylindrical portion 7. Further, the retaining portion 9 does not necessarily need to be divided into the cylindrical fixing portion 16 and the return portion 18, and may be any member that protrudes from the outer peripheral wall 8 in the outer peripheral direction and engages with the locking member 6.

  Next, a method for fixing the locking member 6 and the duct 1 will be described.

The receiving part 40 has a C-shape 45 in which a part of the ring shape is cut out. (See Figs. 1 and 3)
Further, the outer diameter of the outer periphery of the C-shaped 45 receiving portion is larger than the inner diameter of the duct 1.

  As a result, when the locking member 6 is inserted into the duct 1, the receiving portion 40 has a C shape, so the curvature of the outer diameter of the receiving portion is changed to a smaller or larger curvature diameter than the original curvature diameter. Can be made.

  When inserting the locking member 6 into the duct 1, the C-shaped 45 receiving portion 40 is inserted into the duct 1 with the diameter slightly smaller than the inner diameter of the duct 1 (first stage in FIG. 3).

  After the end 44 of the locking member 6 is inserted to the same plane as the end opening 2 of the duct 1, the force for reducing the diameter is released and disposed at that position. The outer periphery of the locking member 6 is constantly expanded by the restoring force of the outer diameter, and the locking member 6 is urged against the inner peripheral wall 5 of the duct 1 and is fixed to the duct 1 (second stage in FIG. 2).

  Moreover, as shown in FIG. 7, the adhesion part 48 is provided in the outer peripheral wall 47 in ring shape.

  Thereby, the locking member 6 is more firmly fixed to the duct 1 by the adhesive force of the adhesive portion 48.

  Further, since the curvature of the outer diameter of the C shape can be changed to some extent, the locking member 6 can be fixed to the duct even if the inner diameter of the duct differs by several millimeters.

If the inner diameter of the duct is about several millimeters larger, the outer diameter curvature of the receiving part can be plastically deformed slightly and then fixed using the restoring force as described above. The member 6 can be fixed.
(Embodiment 2)
Next, the ventilation hood according to Embodiment 2 will be described with reference to FIG. Note that in the second embodiment, differences from the above embodiment will be described. Here, FIG. 8 is a perspective view showing a state in which the locking member according to Embodiment 2 is inserted into the duct.

  In the present embodiment, the protrusion 49 is provided on the outer peripheral wall 47 of the ring shape of the locking member 6a.

As shown in FIG. 8, the protrusion 49 has a ring-shaped shape with an acute angle directed sharply toward the outside from the outer peripheral wall 47.
After the locking member 6a is inserted into the duct 1, the locking member 6a is positioned at a predetermined position of the duct 1, that is, after the end 44 of the locking member 11 of the locking member 6a is positioned on the same plane as the wall surface 33, A force is applied from the inside of the locking member 6 toward the inner peripheral wall 5 side of the duct 1. As a result, the protrusion 49 bites into the inner peripheral wall 5 of the duct 1, so that the locking member 6 a is firmly fixed to the duct 1. In the figure, the protrusion 49 is provided on the key-shaped portion 43, but it is needless to say that the position of the protrusion may be on the receiving portion 40, and the number of the protrusions 49 is fixed more firmly.
(Embodiment 3)
Next, a ventilation hood according to Embodiment 3 will be described with reference to FIG.

  Note that in the third embodiment, differences from the above embodiment will be described. FIG. 9 is a perspective view showing an insertion state of the locking member according to the third embodiment of the invention into the duct.

In the present embodiment, there is provided a through hole 50 penetrating from the inner periphery of the locking member 6b to the outer peripheral wall 47 in the ring shape. Further, the duct 1 has a convex portion 51 at the same position of the through hole 50 and the inner peripheral wall 5 of the duct 1b when the locking member 6b and the duct are in a normal position in construction. For example, when the duct is made of a metallic thin plate material such as a spiral steel pipe, the convex portion can be processed by a so-called manufacturing method called a dowel. In this configuration, when the locking member 6b is arranged at a normal position in the construction of the duct 1b while reducing the diameter of the locking member 6b, the convex portion 51 of the duct 1b and the through hole 50 of the locking member 6b. I agree. The ring shape of the locking member 6b always acts in the direction of spreading by the restoring force, and the movement of the locking member 6b inside the duct 1b is suppressed by fitting with the through hole 50 and the convex portion 51, It has a fixed structure.
(Embodiment 4)
Next, a ventilation hood according to Embodiment 4 will be described with reference to FIGS. 10 and 11. Note that in this embodiment, differences from the above embodiment will be described. Here, FIG. 10 is a perspective view showing a state in which the locking member according to the present embodiment is inserted into the duct, and FIG. 11 is a perspective view showing a state after the locking member is inserted into the duct.

  In the present embodiment, the disconnection restricting portion 11 has an engaging groove 55 that engages with a stopper 54 provided at the end portion 53 of the duct 1 at the end portion 52 opposite to the receiving portion 40.

  First, in a state where the duct 1 is not yet fixed to the wall surface, the locking member 6c is once inserted into the duct 1 slightly behind the normal position in construction. The shape of the stopper 54 as shown in FIG. 10 is produced at the end 53 of the duct 1 that is located in the same straight line as the engagement groove 55 in the central axis direction. In this way, the duct 1c is created. The shape of the stopper 54 can be easily produced, for example, by hitting the tip of a flathead screwdriver against the end of the duct and hitting it toward the inner periphery with a hammer or the like. That is, the stopper 54 can be a protrusion that protrudes toward the center of the duct 1 at the end of the duct.

  After the production of the stopper 54, the stopper 54 and the engagement groove 55 are locked by returning the locking member 6 to the normal position in construction, and the locking member 6c is moved in the direction of removal J. It is possible to suppress the rotational movement in the counterclockwise direction S and the clockwise direction T (circumferential direction M), and to fix the locking member 6c and the duct 1c.

On the other hand, the locking member 6c can be inserted into the duct 1c in which the stopper 54 has been produced in the duct 1 in the same manner as described above. When the engaging member 6c is inserted into the duct 1c, when the outer periphery of the engaging member 6c is reduced in diameter, the engaging member 6c is inserted while the outer periphery of the engaging member is made smaller than the circle connecting the apexes of the stoppers. And if the locking member 6c is inserted to the regular position on construction, the locking member 6c and the duct 1c can be fixed by releasing the small diameter force. The movement restrained state between the locking member and the duct is the same as described above.
(Embodiment 5)
Next, the ventilation hood according to the present embodiment will be described with reference to FIGS. Note that in the fifth embodiment, differences from the above embodiment will be described. 12 is a diagram showing the shape of the retaining portion according to the present embodiment, FIG. 13 is a cross-sectional view showing the state of the retaining portion and the locking member, and FIG. 14 is a diagram showing another shape of the retaining portion, FIG. 15 is a perspective view showing the correlation between the retaining portion and the locking member.

  In the present embodiment, the retaining portion 9 a includes a wedge portion 20.

  As shown in FIG. 12, the wedge portion 20 has an acute angle with the tip sharply pointed with respect to the removal direction J and does not have an acute angle with respect to the insertion direction R toward the return portion 18a side of the retaining portion 9a. That is, it has a triangular shape. In other words, the wedge portion 20 can suppress the movement of the cylindrical portion 7 in the removal direction J as compared with the movement of the cylindrical portion 7 in the insertion direction R (see FIG. 13).

  In the above configuration, even if a force is applied to the cylindrical portion 7 in the removal direction J, the tip of the wedge portion 20 is caught on the inner peripheral wall 5 of the duct 1 as shown in FIG. It is possible to suppress movement in the removal direction J. On the other hand, when the cylindrical portion 7 is inserted into the duct 1, since there is no acute angle with respect to the insertion direction R, the hooking force of the wedge portion 20 on the inner peripheral wall 5 of the duct 1 is small and a large force is required. Can be inserted without any failure.

  In addition, since the wedge part 20 is provided in the return part 18a, the wedge part 20 is always caught by the inner peripheral wall 5 of the duct 1 even if the duct has a different inner diameter.

  As shown in FIG. 14, the acute angle of the wedge portion 20 may be inclined by about 45 degrees with respect to the direction of the wedge portion of FIG. That is, as shown in FIG. 15, the rotation of the cylindrical portion 7 in the counter-rotation direction P is suppressed as compared with the rotation of the cylindrical portion 7 in the rotation direction K.

  In the above configuration, even if a force in the counter-rotation direction P side is applied to the cylindrical portion 7, the wedge portion 20 is caught by the inner peripheral wall 5 of the duct 1, so that the counter-rotating direction of the cylindrical portion 7 is The movement to P can be suppressed. Of course, the movement in the removal direction J can be suppressed at the same time.

  In other words, the cylindrical portion 7 can be easily moved to the restricting position. However, when the cylindrical portion 7 is separated from the restricting position again, it cannot be easily performed because the rotation and movement are suppressed. As a result, it can be firmly fixed. Of course, it is needless to say that a plurality of locking portions and retaining portions are provided, so that they are more firmly fixed.

The ventilation hood according to the present invention has an effect that the ventilation hood can be fixed in a short time without using a screw or a tool, and is useful as a ventilation hood installed on an outer wall of a building or the like.

1, 1b, 1c Duct 2 End opening 3 Cover 4 Ventilation hood 5 Inner peripheral wall 6, 6a, 6b, 6c Locking member 7 Cylindrical part 8 Outer peripheral wall 9, 9a Detachment part 10 Wall 11 Removal restriction part 12 Rotation restriction part DESCRIPTION OF SYMBOLS 15 Front side 16 Cylindrical fixing | fixed part 17 Rear side 18, 18a Return part 20 Wedge part 31 Hole 32 Outer peripheral wall 33 Wall surface 34 Duct cover part 35 Inner circumference 36 Duct cover side opening 37 Flange 38 Position 40 Receiving part 41 Open end part 42 Protruding tip 43 Key-shaped part 44 End 45 C-shaped 47 Outer peripheral wall in ring shape 48 Adhesive part 49 Projection 50 Through hole 51 Convex part 52 End part 53 End part 54 Stopper 55 Engaging groove J Ejecting direction K Rotating direction P Counter-rotation direction R Insertion direction X Center axis M Circumferential direction S Counterclockwise T Clockwise

Claims (16)

A ventilation hood provided with a locking member provided in a hollow cylindrical duct and a cover engaged with the locking member,
The locking member is
A receiving part having a ring shape;
A rotation restricting portion projecting in a direction parallel to the central axis of the ring shape from the opening end of the receiving portion;
A drop-out restricting portion that protrudes in a key shape in the circumferential direction in the ring shape from the protruding tip portion of the rotation restricting portion,
A fixing structure that can be fixed to the inner peripheral wall of the duct;
The cover is
A cylindrical portion that can be inserted and removed on the inner peripheral side of the duct;
A ventilation hood comprising a retaining portion that protrudes from the outer peripheral wall of the cylindrical portion and engages with the locking member to restrict movement of the cylindrical portion in the removal direction. The cylindrical portion is
A rotation structure capable of rotating in the circumferential direction in the inserted state in the duct,
Insertion and extraction of the cylindrical portion into the duct
The removal restricting portion and the retaining portion are performed at different positions on the circumference,
The cylindrical part is fixed to the duct.
The cylindrical portion is rotated in a state where the cylindrical portion is inserted into the duct so that the removal restricting portion and the retaining portion are arranged at a restriction position which is the same position on the circumference. The ventilation hood as described. The omission control part is
Restricting movement of the retaining portion in the direction of withdrawal from the restriction position;
The rotation restricting portion is
The ventilation hood of Claim 2 which controls the rotation to the rotation direction from the said control position of the said securing part. The receiving part is
The ventilation hood according to any one of claims 1 to 3, which has a C shape in which a part of the ring shape is cut out. The fixing structure is
The outer periphery of the C-shape is larger than the inner diameter of the duct,
The ventilation hood according to claim 4, wherein the outer periphery of the C-shape biases the inner peripheral wall of the duct toward the outer peripheral side. The fixing structure is
The ventilation hood of Claim 5 provided with the protrusion part which protrudes in the outer peripheral side in the outer peripheral wall in the said ring shape. The fixing structure is
The ventilation hood of Claim 5 or 6 provided with the adhesion part in the outer peripheral wall in the said ring shape. The retaining portion is
A cylindrical fixing portion fixed to the cylindrical portion on the front side in the insertion direction of the cylindrical portion;
A return portion that rises from the cylindrical portion to the outer peripheral side of the cylindrical fixing portion on the rear side in the insertion direction of the cylindrical portion;
The return part is
The ventilation hood in any one of Claim 1 to 7 engaged with the said locking member. The retaining portion is
The ventilation hood according to any one of claims 1 to 8, further comprising a wedge portion that suppresses movement of the cylindrical portion in the removal direction as compared to movement of the cylindrical portion in the insertion direction. The retaining portion is
The ventilation hood according to claim 9, wherein the return portion includes a wedge portion that suppresses movement of the cylindrical portion in the removal direction as compared to movement of the cylindrical portion in the insertion direction. The wedge portion is
Furthermore, the ventilation hood of Claim 9 or 10 which suppresses the rotation to the other direction of the said cylindrical part compared with the rotation to the one direction of the said cylindrical part. The ventilation hood according to any one of claims 1 to 11, wherein a plurality of the retaining portions are provided in the cylindrical portion. The ventilation hood according to claim 12, wherein the retaining portion is provided in the cylindrical portion at equal intervals. The retaining portion is
The ventilation hood according to claim 12 or 13, wherein a plurality of the rotation restriction portions and the drop restriction portions are provided in the cylindrical portion in correspondence with the rotation restriction portions. The fixing structure is
The ventilation hood according to any one of claims 1 to 14, which is a through-hole penetrating from an inner peripheral wall to an outer peripheral wall of the locking member. The fixing structure is
The ventilation hood according to any one of claims 1 to 15, further comprising an engaging groove that engages with a stopper provided at an end of the duct at an end opposite to the receiving portion of the removal restricting portion.

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