JP7049089B2 - Coupling mechanism, water seal trap, and attachment / detachment device - Google Patents

Description

The present invention relates to a connecting mechanism for connecting the attached body and the attached body, a water-sealed trap provided with the connecting mechanism, and a detachable device including the attached body, the attached body and the connecting mechanism.

Conventionally, a mechanism for connecting an attached body and an attached body has been used for various purposes.

For example, Patent Document 1 discloses a drain trap in a drainage facility in which a drain port of a water tank is connected to a drain pipe. Hereinafter, in the paragraph, the reference numerals of Patent Document 1 are shown in parentheses. The drain trap (4) is used to treat the water used in the water tank (1) toward the drain pipe (18) between the water tank (1) and the existing drain pipe (18), and to use sewage. It is provided to prevent the invasion of malodorous gas such as hydrogen chloride and sanitary harmful animals such as rats into the room. This drain trap (4) is screwed from below into an inlet pipe (5) inserted from above with respect to the drain port (3) and an inlet pipe (5) inserted from above with respect to the drain port (3). It is mainly composed of a contact nut (6) to be worn and a trap body (7) attached to the contact nut (6) from below. The trap body (7) is formed in a bottomed tubular shape that opens upward and is closed by a removable drain cap (7a) at the bottom. The water that has flowed into the trap body (7) is the trap body (7) until the water level reaches the height of the lower end of the outlet (7c) in the first flow path (16) and the second flow path (17). ) Is stored in the sealed water (19), and an air layer (20) is formed above the sealed water (19). Then, water continues to flow into the trap body (7) and the water level of the sealed water (19) rises, so that the sealed water (19) corresponding to the raised water level moves from the outlet (7c) to the drain pipe (18). It is designed to be drained toward.

Japanese Unexamined Patent Publication No. 2012-1907

In the drain trap of Patent Document 1, a drain cap is attached to the trap body, which is an attached body, as an attached body. Dust and the like tend to collect on the drain cap, and the drain cap is removed from the drain trap for maintenance such as cleaning. Then, after maintenance, the drain cap is reattached to the trap body. Generally, a screwing structure with a screw is adopted for the connecting mechanism between the drain cap and the trap member in order to secure the connection in the water-sealed state and the retaining state. Therefore, at the time of maintenance, the user attaches / detaches the drain cap to / from the trap body by rotating the drain cap with respect to the lower end opening of the trap body many times. The trap body is often placed in a narrow space that is out of the reach of the user. In a narrow space, the user has to fumble to attach / detach the drain cap to / from the trap body, and since the user cannot move his / her hand freely in the limited space, the conventional screw-on connection mechanism Then, the problem is that it becomes difficult to perform screwing and screwing operations in which the drain cap is rotated many times.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a connecting mechanism, which enables the attached body to be attached to and detached from the attached body with a simple operation. It is an object of the present invention to provide a water-sealed trap provided and a detachable device by the connecting mechanism.

The coupling mechanism according to claim 1 has a cylindrical or cylindrical tip shape extending in the axial direction, and has an attached body having the tip side facing downward and a hollow opening at one end in the axial direction facing upward. It is a connecting mechanism for detachably connecting to a tubular attachment body.
An inner peripheral surface having a circular shape in cross-sectional view of the attached body, and an attached portion having a protruding piece that protrudes radially inward from the inner peripheral surface.
An outer peripheral surface having a substantially circular shape with a cross-sectional view in which the attachment portion can be externally inserted at the tip of the attachment body, a concave groove recessed in the outer peripheral surface, and the attachment body rather than the concave groove. It is formed so as to be able to be pressure-contacted in the radial direction with respect to the inner peripheral surface of the attachment portion by a pressure contact force that is located on the axial base end side of the attachment body and can prevent the attachment body from freely falling to the attachment body. With an attached portion having an elastic pressure contact body,
The concave groove has an open end that is open to the axial tip of the attachment portion and allows the protruding piece to be introduced into the concave groove, and a bottom wall surface that extends in the circumferential direction so as to face the open end. Formed between
The concave groove is connected to the first passage extending from the opening end to the bottom wall surface and the first passage on the axial base end side of the attachment portion, and extends in the circumferential direction along the bottom wall surface. It consists of a second passage
The first passage is inclined at a predetermined angle with respect to the axial direction so as to face the opening end, and the inclined wall surface extending from the opening end to the bottom wall surface and the first facing wall surface facing the inclined wall surface. Prolonged between and
The second passage extends between the bottom wall surface and the second facing wall surface facing the bottom wall surface at a distance that can accommodate the projecting piece, and one end in the circumferential direction of the second passage. Is communicated with the first passage side, and the other end in the circumferential direction of the second passage is defined by a locking wall surface.
When the attachment portion moves relative to the axial base end side of the attachment portion in a state where the protrusion piece is introduced into the first passage through the opening end, the protrusion piece moves to the attachment body. After the inner peripheral surface of the surface and the pressure contact body move to a first point where pressure contact starts in the radial direction and the projecting piece passes through the first point, the pressure contact body is free to move to the inner peripheral surface of the attachment portion. The projecting piece is guided to the second point where the projecting piece and the bottom wall surface abut by the inclined wall surface in a state of being crimped in the radial direction by a pressure contact force that can prevent the fall, and the projecting piece is brought to the second point. When the attachment portion rotates in one direction with respect to the attachment portion in the positioned state, the projecting piece enters the second passage, and the projecting piece is locked to the locking wall surface. It is characterized by moving to a point.

The connecting mechanism according to claim 2 is such that in the connecting mechanism according to claim 1, the protruding piece at the third point is prevented from moving toward the first passage side on the second facing wall surface. Is provided with an engaging projection protruding into the second passage.

The coupling mechanism according to claim 3 is the coupling mechanism according to claim 1 or 2, wherein the contact step portion that abuts on the inner peripheral surface of the attachment portion from the tip side in the axial direction with respect to the pressure contact body. Is formed, and when the projecting piece abuts on the bottom wall surface, the contact step portion elastically compresses the pressure contact body in the axial direction.

The coupling mechanism according to claim 4 is the coupling mechanism according to claim 3, wherein a part of the inner peripheral surface of the attachment portion faces the outer peripheral surface of the attachment portion and is attached to the pressure contact body. When the pressure contact region is formed and the contact step portion is provided adjacent to the pressure contact region and the protruding piece is located at the third point, the contact step portion is formed from the pressure contact body. It is characterized by receiving an urging force toward the tip side in the axial direction.

The connecting mechanism according to claim 5 is the connecting mechanism according to any one of claims 1 to 4, wherein the first facing wall surface extends in parallel with the inclined wall surface. ..

The connecting mechanism according to claim 6 is the connecting mechanism according to any one of claims 1 to 5, wherein the bottom wall surface faces the first facing wall surface and the second facing wall surface in the axial direction. It is characterized in that only the inclined wall surface faces the opening end.

The coupling mechanism according to claim 7 is the coupling mechanism according to any one of claims 1 to 6, wherein the attachment body is a cap body having an axial tip closed.

The connecting mechanism according to claim 8 is the connecting mechanism according to any one of claims 1 to 6, wherein the attached body forms the bottom of a water storage space in cooperation with the attached body. It is characterized by being a cap body for receiving water having a constituent bottom wall.

The water-sealed trap according to claim 9 has an outer cylinder that opens at the tip in the axial direction and extends in the axial direction, and an outer cylinder that opens at both ends in the axial direction and is inserted into the outer cylinder to extend in the axial direction and the outer cylinder. An attached body having an inner cylinder extending from the base end,
A hollow tubular attachment body having a cylinder wall that opens at one end in the axial direction and a bottom wall that constitutes the bottom of the water storage space formed in cooperation with the attachment body.
The connecting mechanism according to any one of claims 1 to 8 for detachably connecting the attached body and the attached body is provided, and the base end of the outer cylinder and the outer periphery of the inner cylinder are provided. It is characterized in that a drainage port connecting portion communicating with the outer cylinder is formed at a position retracted from the tip of the inner cylinder.

The attachment / detachment device according to claim 10 includes an attached body having a cylindrical or cylindrical tip shape extending in the axial direction.
A hollow cylindrical attachment body that is extrapolated and fitted to the tip of the attachment body,
It is characterized by comprising the connecting mechanism according to any one of claims 1 to 8 for detachably connecting the attached body and the attached body.

The connecting mechanism according to claim 11 has a cylindrical or cylindrical tip shape extending in the axial direction, and has an attached body having the tip side facing downward and a hollow opening at one end in the axial direction facing upward. It is a connecting mechanism for detachably connecting to a tubular attachment body.
An inner peripheral surface having a circular shape in cross-sectional view of the attached body, and an attached portion having a concave groove recessed in the inner peripheral surface.
An outer peripheral surface having a substantially circular shape with a cross-sectional view in which the attachment portion can be externally inserted at the tip of the attachment body, a protruding piece protruding radially outward from the outer peripheral surface, and the attachment from the protruding piece. It is located on the axial base end side of the body and can be pressure-contacted in the radial direction with respect to the inner peripheral surface of the attachment part by the pressure contact force that can prevent the attachment body from freely falling to the attachment body. With an attachment portion having an elastic pressure contact formed,
The concave groove is open to one end in the axial direction of the attachment portion to allow the protruding piece to be introduced into the concave groove, and a bottom wall surface extending along the circumferential direction so as to face the open end. Formed between and
The concave groove is connected to the first passage extending from the opening end to the bottom wall surface and the first passage on the other end side in the axial direction of the attachment portion, and extends in the circumferential direction along the bottom wall surface. It consists of two passages
The first passage is inclined at a predetermined angle with respect to the axial direction so as to face the opening end, and the inclined wall surface extending from the opening end to the bottom wall surface and the first facing wall surface facing the inclined wall surface. Prolonged between and
The second passage extends between the bottom wall surface and the second facing wall surface facing the bottom wall surface at a distance that can accommodate the projecting piece, and one end in the circumferential direction of the second passage. Is communicated with the first passage, and the other end in the circumferential direction of the second passage is defined by a locking wall surface.
When the attachment portion moves relative to the axial base end side of the attachment portion in a state where the protrusion piece is introduced into the first passage through the opening end, the protrusion piece moves to the attachment body. After the inner peripheral surface of the surface and the pressure contact body move to a first point where pressure contact starts in the radial direction and the projecting piece passes through the first point, the pressure contact body is free to move to the inner peripheral surface of the attachment portion. The projecting piece is guided to the second point where the projecting piece and the bottom wall surface abut by the inclined wall surface in a state of being crimped in the radial direction by a pressure contact force that can prevent the fall, and the projecting piece is brought to the second point. When the attachment portion rotates in one direction with respect to the attachment portion in the positioned state, the projecting piece enters the second passage, and the projecting piece is locked to the locking wall surface. It is characterized by moving to a point.

According to the connecting mechanism according to claim 1, the attachment body and the attachment body are formed by the relationship between the concave groove recessed in the outer peripheral surface of the attachment body and the projecting piece projected on the inner peripheral surface of the attachment body. It can be easily attached to and detached from the attached body. Specifically, when the attachment body is attached to the attachment body, the attachment body is moved to the axial base end side with respect to the attachment portion. When pushed in the axial direction, the protruding piece is introduced into the first passage through the open end of the concave groove. With the projecting piece introduced into the first passage through the open end, when the attachment body is further pushed in the axial direction with respect to the attachment body, the protrusion piece becomes the inner peripheral surface of the attachment body and the pressure contact body. Moves to the first point where the pressure welding starts. After the projecting piece has passed the first point, when the attachment body is further pushed in the axial direction with respect to the attachment body, the projection piece bottoms while the attachment body is held by the attachment body by the pressure contact body. Move to the second point that abuts on the wall. At this time, the inclined wall surface guides the protruding piece to the second position. That is, the inner peripheral surface of the attachment body and the pressure contact of the pressure contact body start after the projecting piece is arranged in the first passage from the open end, and the second position is movable to the second passage. Before reaching. Then, when the projecting piece is located between the first point and the second point, the attachment body is free-moving (for example, free) by the pressure contact force between the peripheral surface of the attachment body and the pressure contact body. Fall) is blocked. Therefore, even if the user releases his / her hand from the attachment body, the attachment body can be maintained in place. Then, when the attachment portion is rotated in one direction with respect to the attachment portion while the protrusion piece is located at the second point, the protrusion piece enters the second passage from the first passage, and the protrusion piece engages. Move to a third point that is locked to the stop wall. When the projecting piece is located at the third point, the projecting piece is arranged between the bottom wall surface of the concave groove and the second facing wall surface, so that the movement of the projecting piece on the axial tip side is restricted. As a result, the attachment body is prevented from coming off along the axial direction with respect to the attachment body. In cooperation with the crimping force of the pressure welded body, the attached body is attached so as not to be abruptly detached from the attached body. That is, after the operation of pushing the attached body into the attached body in the axial direction, the attached body is attached by performing the operation of rotating the attached body with respect to the attached body in less than one round. Can be easily attached to the body. On the other hand, when the attached body is separated from the attached body, after the operation of rotating the attached body with respect to the attached body in less than one round, the attached body is axial with respect to the attached body. The attachment body can be easily removed from the attachment body by performing the operation of pulling out in the direction. Therefore, the connecting mechanism of the present invention easily connects the attached body and the attached body to each other.

According to the coupling mechanism according to claim 2, in addition to the effect of the invention of claim 1, the engaging projection is provided by the engaging projection protruding from the second facing wall surface into the second passage. The unintended movement of the projecting piece is hindered, and the attached body in the attached state is prevented from suddenly rotating in the detaching direction with respect to the attached body.

According to the coupling mechanism according to claim 3, in addition to the effect of the invention of claim 1 or 2, when the projecting piece abuts on the bottom wall surface, the contact step portion elastically compresses the pressure contact body in the axial direction. As a result, the protruding pieces at the second and third positions are urged toward the tip end side in the axial direction and pressed against the second facing wall surface side, and the attached body in the attached state suddenly with respect to the attached body. Rotation in the detachment direction is suppressed.

According to the coupling mechanism according to claim 4, in addition to the effect of the invention of claim 3, the pressure contact force between the pressure contact body and the pressure contact region and the axial tip side from the pressure contact body to the contact step portion. In cooperation with the urging force of the above, it is possible to prevent the attached body in the attached state from suddenly rotating in the detaching direction with respect to the attached body.

According to the coupling mechanism according to claim 5, in addition to the effect of the invention according to any one of claims 1 to 4, the first facing wall surface extends in parallel with the inclined wall surface, so that the first facing wall surface is attached. When the body is removed from the attached body, the first facing wall surface functions to guide the projecting piece in the same manner as the inclined wall surface. Alternatively, after the projecting piece is introduced into the first passage, the first facing wall surface extends parallel to the inclined wall surface even when a rotational force is applied to the attachment body instead of the axial pressing force. By doing so, the projecting piece moving in the circumferential direction comes into contact with the first facing wall surface, and the projecting piece can be guided to the second point by the first facing wall surface.

According to the coupling mechanism according to claim 6, in addition to the effect of the invention according to any one of claims 1 to 5, since the bottom wall surface does not face the outside through the open end, the protrusion in the vicinity of the second point It is possible to prevent the piece from easily coming out from the end of the opening.

According to the coupling mechanism according to claim 7, in addition to the effect of the invention according to any one of claims 1 to 6, the attachment body can function as a cap body.

According to the coupling mechanism according to claim 8, in addition to the effect of the invention according to any one of claims 1 to 6, the attachment body can function as a cap body for receiving water.

According to the coupling mechanism according to claim 9, the effect of any one of claims 1 to 8 can be exerted as a water-sealed trap.

According to the attachment body according to claim 10, the effect of any one of claims 1 to 8 can be exhibited as a detachable device.

According to the coupling mechanism according to claim 11, the relationship between the concave groove recessed in the outer peripheral surface of the attached body and the protruding piece projected on the inner peripheral surface of the attached body causes the attachment body. It can be easily attached to and detached from the attached body. Specifically, when the attachment body is attached to the attachment body, the attachment body is moved to the axial base end side with respect to the attachment portion. When pushed in the axial direction, the protruding piece is introduced into the first passage through the open end of the concave groove. With the projecting piece introduced into the first passage through the open end, when the attachment body is further pushed in the axial direction with respect to the attachment body, the inner peripheral surface of the attachment body and the pressure contact body come into pressure contact. The protrusion moves to the first point where it starts. After the projecting piece has passed the first point, when the attachment body is further pushed in the axial direction with respect to the attachment body, the projection piece bottoms while the attachment body is held by the attachment body by the pressure contact body. Move to the second point that abuts on the wall. At this time, the inclined wall surface guides the protruding piece to the second position. That is, the inner peripheral surface of the attachment body and the pressure contact of the pressure contact body start after the projecting piece is arranged in the first passage from the open end, and the second position is movable to the second passage. Before reaching. Then, when the projecting piece is located between the first point and the second point, the attachment body is free-moving (for example, free) by the pressure contact force between the peripheral surface of the attachment body and the pressure contact body. Fall) is blocked. Therefore, even if the user releases his / her hand from the attachment body, the attachment body can be maintained in place. Then, when the attachment portion is rotated in one direction with respect to the attachment portion while the protrusion piece is located at the second point, the protrusion piece enters the second passage from the first passage, and the protrusion piece engages. Move to a third point that is locked to the stop wall. When the projecting piece is located at the third point, the projecting piece is arranged between the bottom wall surface of the concave groove and the second facing wall surface, so that the movement of the projecting piece on the axial tip side is restricted. As a result, the attachment body is prevented from coming off along the axial direction with respect to the attachment body. In cooperation with the crimping force of the pressure welded body, the attached body is attached so as not to be abruptly detached from the attached body. That is, after the operation of pushing the attached body into the attached body in the axial direction, the attached body is attached by performing the operation of rotating the attached body with respect to the attached body in less than one round. Can be easily attached to the body. On the other hand, when the attached body is separated from the attached body, after the operation of rotating the attached body with respect to the attached body in less than one round, the attached body is axial with respect to the attached body. The attachment body can be easily removed from the attachment body by performing the operation of pulling out in the direction. Therefore, the connecting mechanism of the present invention easily connects the attached body and the attached body to each other.

(A) A perspective view from above and (b) a perspective view from below of the water-sealed trap according to the embodiment of the present invention. 1 (a) plan view, (b) front view, (c) bottom view and (d) side view of the water-sealed trap of FIG. (A) AA cross-sectional view and (b) BB cross-sectional view of the water-sealed trap of FIG. An exploded perspective view of the water-sealed trap of FIG. (A) A perspective view from above and (b) a perspective view from below of the trap body of the water-sealed trap of FIG. 1. 5 (a) plan view, (b) front view, (c) bottom view and (d) side view of the trap body of FIG. FIG. 6A is a cross-sectional view taken along the line CC and FIG. 6B is a cross-sectional view taken along the line DD. A partially enlarged front view showing a concave groove of the trap body of FIG. 1. FIG. 1 is a perspective view of the cap body of the water-sealed trap from above (a) and a perspective view from below (b). 9 is a plan view, a front view, a bottom view, and a side view of the cap body of FIG. (A) EE sectional view and (b) FF sectional view of the trap body of FIG. 10. The schematic diagram which shows each process at the time of attaching the attachment body to the attached body in the connection mechanism of one Embodiment which concerns on this invention. The schematic diagram which shows each step at the time of removing the attachment body from the attachment body in the connection mechanism of one Embodiment which concerns on this invention. The schematic diagram which shows the form of packing in each process of FIGS. 12, 13. The schematic diagram which shows the arrangement structure provided with the water seal trap of one Embodiment of this invention. The figure which shows the modification of one Embodiment which concerns on the connection mechanism of this invention. The figure which shows the modification of one Embodiment which concerns on the attachment / detachment apparatus of this invention. The schematic diagram which shows the connection mechanism and attachment / detachment apparatus of another embodiment of this invention. FIG. 6 is a schematic view showing a form in which an attached body is attached to an attached body in the connecting mechanism and the attachment / detachment device of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that the shape of each figure referred to in the following description is a conceptual diagram or a schematic diagram for explaining suitable shape dimensions, and the dimensional ratio and the like do not always match the actual dimensional ratio. That is, the present invention is not limited to the dimensional ratio in the drawings. Further, it goes without saying that the vertical and horizontal directions in the present invention are merely concepts indicating relative positions, and these can be interchanged and applied.

The water-sealed trap 100 will be described as an embodiment of the "attachment / detachment device" provided with the "connecting mechanism" of the present invention. The water-sealed trap 100 is generally connected to the drain port of equipment such as a kitchen sink, a bathtub, a toilet, and a water heater installed in a building, and drains the drainage from the equipment to the drainage system. It is connected to a drainage pipe that opens upstream of the drainage system. The water-sealed trap 100 is configured to collect drainage inside, and the stored residual drainage blocks the drainage pipe to prevent the malodor drifting from the downstream of the drainage pipe from leaking into the room. Needless to say, the present embodiment is merely an example of the present invention and does not limit its use and configuration. Hereinafter, the configuration of the water-sealed trap 100 will be described as an embodiment of the present invention with reference to the drawings.

1 (a) and 1 (b) are perspective views of the water-sealed trap 100 according to the embodiment of the present invention. 2 (a) to 2 (d) are a plan view, a front view, a bottom view, and a side view of the water-sealed trap 100. 3A and 3B are a vertical sectional view taken along the line AA and a cross-sectional view taken along the line BB of the water-sealed trap 100. FIG. 4 is an exploded perspective view of the water-sealed trap 100.

As shown in FIGS. 1 to 4, the water-sealed trap 100 includes a trap body 101 as an attachment body and a cap body 120 for receiving water as an attachment body detachably attached to the trap body 101. And prepare. In the present embodiment, for convenience of explanation, the end portion of the water-sealed trap 100 on the device side (upper side of FIG. 2A) is used as the base end, and the end portion on the opposite side (lower side of FIG. 2B) is used as the base end. Defined as the tip. As shown in FIG. 3, the cap body 120 is extrapolated and fitted to the tip portion of the trap body 101 to block the tip portion of the trap body 101. Then, by the connecting mechanism of the present invention, the cap body 120 is held by the trap body 101 so as not to easily fall off, and the cap body 120 can be easily separated from the trap body 101. Hereinafter, each component of the water-sealed trap 100 will be described.

The trap main body 101, which is an attached body, will be described with reference to FIGS. 5 to 8. 5 (a) and 5 (b) are perspective views of the trap body 101. 6 (a) to 6 (d) are a plan view, a front view, a bottom view, and a side view of the trap body 101. 7 (a) and 7 (b) are a CC vertical sectional view and a DD horizontal sectional view of the trap main body 101. FIG. 8 is an enlarged view of the concave groove 113 of the trap main body 101.

The trap body 101 has a hollow cylindrical outer cylinder 102 that opens at the tip (lower end) in the axial direction and extends along the axial direction, and an outer cylinder 102 that opens at both ends in the axial direction and is inserted into the outer cylinder 102 along the axial direction. As an inner cylinder 103 (smaller diameter than the outer cylinder 102) extending from the base end (upper end) of the outer cylinder 102 and a cylindrical or cylindrical tip shape extending along the axial direction from the tip of the outer cylinder 102. It is provided with a formed attachment portion 111. The outer diameters of the outer cylinder 102 and the attached portion 111 are substantially the same. A flange 106 having an enlarged diameter is formed between the outer cylinder 102 and the attached portion 111. The lower surface of the flange 106 is configured to receive the end face of the cap body 102 externally inserted into the attachment portion 111.

The inner cylinder 103 is connected to the drain port of the device located upstream of the water-sealed trap 100 at the base end, and is configured to introduce the drainage from the device into the trap body 101. Further, the tip of the inner cylinder 103 extends to the vicinity of the tip of the outer cylinder 102 and is located retracted or separated from the tip of the trap main body 101. Then, the space between the base end of the outer cylinder 102 and the outer peripheral surface of the inner cylinder 103 is closed by the connecting wall 105. As shown in FIG. 7A, a water storage space 108 is formed inside the trap body 101 in cooperation with the cap body 120. A drainage side connection portion 104 that communicates with the outer cylinder 102 is formed at a position retracted from the tip of the inner cylinder 102. The drainage side connection portion 104 is formed in the vicinity of the base end of the outer cylinder 102 and communicates with the water storage space 108. By filling the water storage space 108 with the residual drainage, it is possible to prevent the odor from flowing back from the drainage side connection portion 104.

The attachment portion 111 is more than an outer peripheral surface 112 having a substantially uniform cross-sectional view in the axial direction, a concave groove 113 recessed radially inward from the outer peripheral surface 112, and the concave groove 113. An elastic packing (pressure contact body) 118 arranged on the proximal end side in the axial direction is provided.

The concave groove 113 is formed in a predetermined region of the outer peripheral surface 112 so as to receive the protruding piece 125 of the cap body 120. That is, the concave groove 113 has a depth capable of accommodating the projecting piece 125. In the present embodiment, four concave grooves 113 are formed at equal intervals in the circumferential direction on the axial tip side of the attachment portion 111.

As shown in FIG. 8, the concave groove 113 is opened to the axial tip of the attachment portion 111 so that the protruding piece 125 faces the open end 1131 in which the protruding piece 125 can be introduced into the concave groove 113 and the open end 1131. It is formed on the axial base end side of the attachment portion 111, and is formed between the attachment portion 111 and the bottom wall surface 1132 extending along the circumferential direction. The concave groove 113 is connected to the first passage 114 that linearly extends from the opening end 1131 to the bottom wall surface 1132 with a predetermined width and the first passage 114 on the axial base end side of the attachment portion 111, and is connected to the bottom wall surface. It consists of a narrow second passage 115 extending linearly along 1132. The first passage 114 and the second passage 115 are connected to each other by refracting each other. That is, the concave groove 113 is a region bent in a “dogleg” shape on the outer peripheral surface 112 of the attachment portion 111.

The first passage 114 is inclined at a predetermined angle with respect to the axial direction so as to face the opening end 1131, and the inclined wall surface 1133 extending from the opening end 1131 to the bottom wall surface 1132 and the first facing wall surface 1133 facing the inclined wall surface 1133. It is an area extending from the wall surface 1134. The inclined wall surface 1133 and the first facing wall surface 1134 extend linearly and parallel to each other. The width of the first passage 114 (distance between the inclined wall surface 1133 and the first facing wall surface 1134) is set to be at least larger than the width of the protruding piece 125. In the present embodiment, the inclined wall surface 1133 extends at an inclination angle of about 50 degrees with respect to the cylinder axis. The tilt angle is preferably in the range of 30 to 70 degrees so that the tilted wall surface 1133 effectively guides the protruding piece 125 to the entrance (one end) of the second passage 115 in the circumferential direction. However, the inclination angle of the inclined wall surface of the present invention is not limited to the above range.

The second passage 115 is a region adjacent to the first passage 114 and extending between the bottom wall surface 1132 and the second facing wall surface 1135 facing the bottom wall surface 1132. In FIG. 8, the boundary between the first passage 114 and the second passage 115 is shown by a dotted line. The second facing wall surface 1135 is adjacent to the first facing wall surface 1134 in the circumferential direction and extends along the circumferential direction. That is, the bottom wall surface 1132 and the second facing wall surface 1135 extend linearly and parallel to each other. The width of the second passage 115 (distance between the bottom wall surface 1132 and the second facing wall surface 1135) is set to be smaller than the width of the first passage 114 and slightly larger than the width of the protruding piece 125. .. Further, one end (open end side) of the second passage 115 in the circumferential direction is open to the first passage 114 side. On the other hand, the other (deep side) end of the second passage 115 in the circumferential direction is closed by the locking wall surface 1136. That is, the second passage 115 is a narrow region extending in the circumferential direction defined by the bottom wall surface 1132, the second facing wall surface 1135, the locking wall surface 1136, and the boundary between the first passage 114 and the second passage 115. be.

The bottom wall surface 1132 faces the first facing wall surface 1134 and the second facing wall surface 1135 in the axial direction, and does not face the opening end 1131. On the other hand, the inclined wall surface 1133 faces the first facing wall surface 1134 and the opening end 1131 in the axial direction, and does not face the second facing wall surface 1132. That is, only the inclined wall surface 1131 faces the opening end 1131. With this configuration, even if the projecting piece 125 is introduced into the first passage 114 from an arbitrary position in the circumferential direction of the opening end 1131, the projecting piece 125 traveling along the axial direction abuts on the bottom wall surface 1132. It becomes possible to abut on the inclined wall surface 1133.

An engaging projection 116 projecting into the second passage 115 is formed in the vicinity of the other end portion in the circumferential direction of the second facing wall surface 1135. The distance between the tip of the engaging protrusion 116 and the bottom wall surface 1132 is approximately equal to the axial width of the protruding piece 125. Further, the distance between the outer surface of the engaging protrusion 116 and the locking wall surface 1136 is substantially equal to the width of the protruding piece 125 in the circumferential direction. The engaging protrusion 116 continuously rises from the bottom wall surface 1132 in a convex curved surface shape. As will be described later, the engaging protrusion 116 allows the protruding piece 125 to move toward the locking wall surface 1136 along the circumferential direction, while locking the protruding piece 125 in the attached state to cause the protruding piece 125. Works to prevent the movement toward the first passage 114 side along the circumferential direction.

The total length of the first passage 114 and the second passage 115 of the concave groove 113 in the circumferential direction is substantially equal to the arc length at a central angle of about 90 degrees on the outer peripheral surface 112. Further, the length of the bottom wall surface 1132 in the circumferential direction is substantially equal to the arc length of the outer peripheral surface 112 having a central angle of about 45 degrees. The length of the concave groove 113 and the bottom wall surface 1132 in the circumferential direction influences the amount of rotation required for attachment / detachment of the cap body 120 (attachment portion 123) to the trap main body 101 (attachment portion 111).

The packing 118 is an annular body made of an elastic material such as rubber, and is housed in an annular fine groove formed on the outer peripheral surface 112. The outer peripheral surface of the packing 118 projects radially outward from the outer peripheral surface 112 at a predetermined height. The packing 118 is formed so as to be pressure-contactable with the inner peripheral surface 124 of the cylinder wall 121 of the cap body 120. In the present embodiment, the packing 118 is mounted on the outer peripheral surface 112 near the base end of the drainage side connection portion 104.

Next, the cap body 120, which is an attachment body, will be described with reference to FIGS. 9 to 11. 9 (a) and 9 (b) are perspective views of the cap body 120. 10 (a) to 10 (d) are a plan view, a front view, a bottom view, and a side view of the cap body 120. 11 (a) and 11 (b) are a vertical sectional view of EE and a horizontal sectional view of FF of the cap body 120.

The cap body 120 is a hollow cylindrical body including a tubular wall 121 having one end open in the axial direction and a bottom wall 122 closing the other end in the axial direction of the tubular wall 121. On the inner surface of the cylinder wall 121 of the cap body 120, the attachment portion 123 corresponding to the attachment portion 111 described above is provided. The attachment portion 123 has an inner peripheral surface 124 having a circular cross-sectional view of the attachment body 120, and a protruding piece 125 projecting radially inward from the inner peripheral surface 124. Further, the diameter of the inner peripheral surface 124 of the cap body 101 is determined so as to correspond to the diameter of the outer peripheral surface 112 of the attached portion 111. Specifically, the inner diameter of the inner peripheral surface 124 of the cap body 101 is set to be slightly larger than the outer diameter of the outer peripheral surface 112 of the attachment portion 111 and smaller than the outer diameter of the packing 118. ing. As a result, the inner peripheral surface 124 of the cap body 101 can move or slide in the axial direction with respect to the outer peripheral surface 112 of the attached portion 111.

In this embodiment, two projecting pieces 125 are formed at positions facing each other in the radial direction. The protruding piece 125 is a small columnar protrusion, and has a height and a width (diameter) that can enter the recessed groove 113 described above. The axial position of the projecting piece 125 on the inner peripheral surface 124 is set so that the projecting piece 125 is accommodated in the second passage 115 of the concave groove 113 when the cap body 120 is attached to the trap body 101. There is. In the present embodiment, the projecting piece 125 is formed in the vicinity of substantially the center of the cap body 120 in the axial direction. Further, the circumferential position of each protruding piece 125 is defined so that each protruding piece 125 simultaneously enters each corresponding concave groove 113 and is arranged at the same relative position in each concave groove 113.

Further, the inner diameter of the region near one end (opening side end portion) of the inner peripheral surface 124 is relatively larger than the inner diameter of the other end side (bottom wall 122 side), and the pressure contact region 126 is formed at the expanded portion. Is formed. The contact step portion 127 is formed adjacent to the pressure contact region 126. In other words, the contact step portion 127 is an annular step formed at the boundary between a portion having a relatively enlarged diameter in the inner diameter and another portion. The inner diameter of the pressure contact region 126 is set to be slightly larger than the outer diameter of the outer peripheral surface 112 of the attachment portion 111 and smaller than the outer diameter of the packing 118. As a result, the pressure contact region 126 can be moved axially with respect to the outer peripheral surface 112 of the attachment portion 111, and the pressure contact region 126 can be pressure-contacted with respect to the packing 118 in the radial direction. The cap body 120 may be temporarily held against the trap body 101 by the pressure contact force of the packing 118 with respect to the pressure contact region 126. Further, the contact step portion 127 projects from the pressure contact region 126 so as to abut against the packing 118 from the axial tip side (from the lower side to the upper side) of the attachment portion 111. As will be described later, when the cap body 120 is attached to the trap body 101, the contact step portion 127 elastically compresses the packing 118 in the axial direction, and the elastic return force of the packing 118 causes the cap body 120 to be at the tip in the axial direction. It is urged to the side (downward). In other words, the axial positions of the pressure contact region 126 and the contact step portion 127 are determined according to the position of the packing 118.

Subsequently, a connection mechanism for detachably connecting the cap body 120, which is an attachment body, to the trap body 101, which is an attachment body, will be described. FIG. 12 is a schematic diagram illustrating a mechanism for attaching the cap body 120 to the trap body 101 by the connecting mechanism of the present embodiment. FIG. 13 is a schematic view illustrating a mechanism for removing the cap body 120 from the trap body 101 by the connecting mechanism of the present embodiment. FIG. 14 is a schematic view showing the relationship between the packing 118 and the contact step portion 127 in one step of FIGS. 12 and 13.

The connecting mechanism is a device or concept composed of an attached portion 111 of the trap main body 101 and an attached portion of the cap main body 120. As shown in FIGS. 3A and 3B, when the attached portion 111 is completely attached to the cap body 120, the packing 118 is in pressure contact with the pressure contact region 126 of the inner peripheral surface 124 of the cap body 120. At the same time, the protruding piece 125 of the cap body 120 is arranged in the concave groove 113. In this attached state, the protruding piece 125 is arranged at a deep portion separated from the opening end 1131 of the concave groove 113, so that the cap body 120 is locked so as not to be separated from the trap body 101 in the axial direction. There is. Hereinafter, with reference to FIGS. 12 and 13, the attachment / detachment form of the connecting mechanism configured by the relationship with the concave groove 113 and the projecting piece 125 will be described in detail.

To attach the cap body 120 to the trap body 101, move the cap body 120 close to the trap body 101 along the axial direction so as to cover the trap body 101, and then move the cap body 120 in one direction with respect to the trap body 101. It may be rotated at the rotation angle of.

Specifically, as shown in FIG. 12A, the attachment portion 123 of the cap body 120 moves along the axial direction so as to be close to the attachment portion 111 of the trap body 101. Then, the projecting piece 125 is introduced into the first passage 114 of the concave groove 113 through the open end 1131 of the concave groove 113 (see FIG. 12B). When the attachment portion 123 moves toward the attachment portion 111 toward the axial base end side of the attachment portion 111 in a state where the projecting piece 125 is introduced into the first passage 114 through the opening end 1131, the attachment portion 123 is moved toward the axial base end side of the attachment portion 111. The projecting piece 125 abuts on the inclined wall surface 1133, and the projecting piece 125 moves along the inclined wall surface 1133 to the deep portion of the concave groove 113. Then, the projecting piece 125 moves in the concave groove 113 to the inner peripheral surface 124 (pressing region 126) of the attachment body 123 and the first point where the packing 118 starts the pressing contact (FIGS. 12 (c) and 14 (FIG. 14). a) See). In other words, the projecting piece 125 abuts on the inclined wall surface 1133, the projecting piece 125 is guided along the inclined wall surface 1133, the pressing force in the axial direction is converted in the rotational direction by the inclined wall surface 1133, and the cap body 120 rotates. While moving to the first point in the deep part of the concave groove 113. That is, since the pressing force in the axial direction is converted into a rotational force, the user can effectively move the projecting piece 125 to the deeper first position without applying the rotational force to the cap body 120. Can be done. Even if the cap body 120 is released from the cap body 120 while the packing 118 and the pressure contact region 126 are in pressure contact with each other, the cap body 120 is temporarily held by the trap body 101 to prevent free fall. Further, depending on the position in the circumferential direction of the opening end 1131 through which the projecting piece 125 passes, the projecting piece 125 may be configured to reach the first point before abutting on the inclined wall surface 1133.

Then, after the projecting piece 125 has passed the first point, the projecting piece 125 slides on the inclined wall surface 1133 and hits the bottom wall surface 1132 in a state where the packing 118 is crimped to the inner peripheral surface 124 of the mounting portion 123. Contact (see FIG. 12 (d)). The point where the projecting piece 125 and the bottom wall surface 1132 come into contact with each other is defined as the second point. At this time, the tip surface of the attachment portion 111 is in contact with or very close to the bottom wall 122 of the cap body 120, and the open end surface of the tubular wall 121 of the cap body 120 is in contact with or very close to the flange 106 of the trap body 101. are doing. At the same time, the contact step portion 127 of the cap body 120 is in pressure contact with the packing 118 toward the tip end side in the axial direction, and the packing 118 is elastically deformed toward the proximal end side in the axial direction (see FIG. 14B). That is, the pressure contact between the inner peripheral surface 124 of the cap body 120 and the packing 118 starts after the projecting piece 125 is arranged from the opening end 1131 to the first passage 114, and is movable to the second passage 115. Before reaching the second position. During this time, the cap body 120 is prevented from falling freely. Further, at the second point, since the projecting piece 125 does not face the opening end 1131 in the axial direction, the temporary holding of the cap body 120 and the trap body 101 is effectively maintained.

That is, the inclined wall surface 1133 can guide the projecting piece 125 to the inner peripheral surface 124 (pressure contact region 126) of the attachment portion 123 and the first point where the packing 118 starts pressure welding, and then the packing 118 can guide the protrusion piece 125 to the pressure contact region 126. The projecting piece 125 is configured to be able to be guided to a second point where the projecting piece 125 and the bottom wall surface 1132 come into contact with each other in a state of being crimped to. That is, when the pressing force in the axial direction is applied to the cap body 120, the pressing force in the axial direction is guided by the inclined wall surface 1133 inclined from the axial direction, and the pressing force in the axial direction is converted into a propulsive force in the axial direction and a rotational force in the circumferential direction. Therefore, the cap body 120 advances in the axial direction while rotating. In this way, the user simply presses the cap body 120 along the axial direction, and the inclined wall surface 1133 guides the projecting piece 125 to the entrance of the second passage 115 located on the deeper side. The amount of wasteful rotation operation of 120 is reduced, and as a result, a better usability is provided to the user. According to the present embodiment, the user can move to the first position or the second position without passing through the guide of the inclined wall surface 1133, depending on the working environment. For example, if there is a space around the cap body 120 and it is easy to rotate the cap body 120, the user can apply a rotational force to the cap body 120 instead of an axial pressing force after the protruding piece 125 is introduced into the concave groove 113. By giving it, the projecting piece 125 can be moved to the second point. In this case, the projecting piece 125 abuts on the first facing wall surface 1135 extending parallel to the inclined wall surface 1133, and the rotational force in the circumferential direction is converted into the propulsive force in the axial direction. That is, the first facing wall surface 1135 can function to guide the projecting piece 125 to the first point or the second point in the same manner as the inclined wall surface 1133.

When the projecting piece 125 is located at the second point in FIG. 12 (d), a rotational force is applied to the attachment portion 123 and the attachment portion 123 rotates in one direction with respect to the attachment portion 111, the projection piece 125 protrudes. The piece 125 enters the second passage 115 from the first passage 114. Along with the rotation, the projecting piece 125 moves in the second passage 115 in the circumferential direction along the bottom wall surface 1132 (see FIG. 12 (e)). Then, the protruding piece 125 moves beyond the engaging protrusion 116 until it is locked to the locking wall surface 1136. The point where the projecting piece 125 shown in FIG. 12F abuts on the locking wall surface 1136 is defined as the third point. That is, the third point is located at the deepest part of the concave groove 113. Then, when the pressing force applied to the axial base end side of the cap body 120 is eliminated, the cap body 120 is moved to the tip end side of the attachment portion 111 by the elastic return force to the axial end end side of the packing 118. It moves slightly (see FIG. 14 (c)). Along with this, the protruding piece 125 moves from the bottom wall surface 1132 side to the second facing wall surface 1135 side in the second passage 115 (see FIG. 12 (f)). At this time, the packing 118 urges the protruding piece 125 toward the second facing wall surface 1135, and the engaging protrusion 116 is arranged so as to be adjacent to the protruding piece 125 in the circumferential direction. As a result, the circumferential (unintended) movement of the protruding piece 125 is suppressed by the engaging projection 116. That is, by holding the projecting piece 125 at the third position, the state in which the cap body 120 is attached to the trap body 101 is maintained.

Subsequently, in order to remove the cap body 120 from the trap body 101, the cap body 120 is rotated in the other direction with respect to the trap body 101 at a rotation angle of less than one round, and then the cap body 120 is rotated with respect to the trap body 101. It may be moved so as to be separated along the axial direction.

Specifically, as shown in FIG. 13A, with the start of rotation of the cap body 120 in the other direction, the protruding piece 125 moves toward the opening end 1131 (first passage 114) in the second passage 115. And start moving. Then, the protruding piece 125 moves so as to get over the engaging protrusion 116 (see FIG. 13 (b)). That is, the protruding piece 125 is guided so as to get over the engaging protrusion 116 by the shape continuously raised from the second facing wall surface 1135 of the engaging protrusion 116. That is, the rotational force applied to the cap body 120 is partially converted into a force toward the proximal end side in the axial direction that opposes the urging force of the packing 118. As a result, the protruding piece 125 moves to the bottom wall surface 1132 side, and the packing 118 is elastically deformed to the axial base end side by the contact step portion 127 (see FIG. 14 (b)).

When the cap body 120 further rotates in the other direction, the projecting piece 125 moves from the second passage 115 into the first passage 114 until it abuts on the inclined wall surface 1133 (see FIG. 13 (c)). When the cap body 120 further rotates in the other direction, the cap body 120 moves toward the tip end side of the attachment portion 111 while the projecting piece 125 slides on the inclined wall surface 1133, and the packing 118 and the pressure contact region 126 (See FIGS. 13 (d) and 14 (a)). Since the pressure contact is eliminated, the cap body 120 can move freely with respect to the attachment portion 111, and as shown in FIGS. 13 (e) and 13 (f), the projecting piece 125 shafts to the open end 1131. Move in the direction. As a result, the cap body 120 moves toward the tip end side in the axial direction and separates from the trap body 101. Even if the cap body 120 rotates in the other direction until the projecting piece 125 moves to a position facing the first facing wall surface 1134 in the axial direction, and immediately after that, an axial force is applied to the cap body 120. good. In that case, the projecting piece 125 slides on the inclined first facing wall surface 1134 and is guided to the open end 1131.

Subsequently, an example of using the water-sealed trap 100 of the present embodiment will be described with reference to FIG. FIG. 15 is a schematic view of the arrangement structure 10 in which the water-sealed trap 100 of the present embodiment is piped. The arrangement structure 10 includes a device 11 such as a water heater, a drainage system 12 for treating wastewater, and a water seal trap 100 arranged between the device 11 and the drainage system 12. A connection pipe 13a is connected to the drain port of the device 11. The water-sealed trap 100 is connected to the device 11 by externally inserting the inner cylinder 103 of the trap main body 101 into the connecting pipe 13a. On the other hand, a connecting pipe 13b is connected to the inflow port of the drainage system 12. The water-sealed trap 100 is connected to the drainage system 12 by connecting the drainage-side connection portion 104 of the trap body 101 to the connection pipe 13b. Then, the water-sealed trap 100 functions to trap the drainage from the device 11 in the water storage space 108 and prevent the odor or the like from the drainage system 12 from flowing back. Further, even if the drainage pipe of the arrangement structure 10 is arranged in a narrow and inaccessible space, the cap body 120 of the water seal trap 100 can be easily attached and detached in the above-mentioned manner. This makes it possible to effectively clean and maintain the inside of the water-sealed trap 100 in the arrangement structure 10.

Hereinafter, the action and effect of the water-sealed trap (attaching / detaching device) 100 or the connecting mechanism according to the embodiment of the present invention will be described.

According to the water-sealed trap 100 of the present embodiment, the concave 113 groove recessed in the outer peripheral surface 112 of the trap body 101 which is the attachment body and the inner peripheral surface 124 of the cap body 120 which is the attachment body are convex. The relationship with the provided protruding piece 125 facilitates attachment / detachment of the cap body 120 to / from the trap body 101. Specifically, when the cap body 120 is attached to the trap body 101, the cap body 120 is moved to the trap body 101 so as to move the attachment portion 123 toward the proximal end side in the axial direction with respect to the attachment portion 111. When pushed in the axial direction, the protruding piece 125 is introduced into the first passage 114 through the open end 1131 of the concave groove 113. When the projecting piece 125 is introduced into the first passage 114 through the opening end 1131 and the cap body 120 is further pushed in the axial direction with respect to the trap body 101, the projecting piece 125 abuts on the inclined wall surface 1133. The projecting piece 125 is guided by the inclined wall surface 1133, and moves to the first point where the pressure welding region 126 and the packing 118 of the inner peripheral surface 124 of the cap body 120 start pressure welding. After the projecting piece 125 has passed the first point, when the cap body 120 is further pushed in the axial direction with respect to the trap body 101, the projecting piece 125 bottoms out while the cap body 120 is held by the trap body 101 by the packing 118. Move to the second point that abuts on the wall surface 1132. When the projecting piece 125 is located between the first point and the second point, the pressure contact force between the pressure contact region 126 and the packing 118 prevents the cap body 120 from freely moving (free fall) with respect to the trap body 101. .. Therefore, even if the user releases the cap body 120, the cap body 120 can be maintained in place. Then, when the attachment portion 121 is rotated in one direction with respect to the attachment portion 111 while the protrusion piece 125 is located at the second point, the protrusion piece 125 enters the second passage 115 from the first passage 114. Then, the projecting piece 125 moves to a third point where it is locked to the locking wall surface 1136. In the state where the projecting piece 125 is located at the third point, since the projecting piece 125 is arranged between the bottom wall surface 1132 of the concave groove 113 and the second facing wall surface 1135, the projecting piece 125 is located on the axial tip side of the projecting piece 125. Movement is restricted, and as a result, axial detachment of the cap body 120 with respect to the trap body 101 is prevented. Therefore, in cooperation with the crimping force of the packing 118, the cap body 120 is attached to the trap body 101 so as not to be abruptly detached. That is, after the operation of pushing the cap body 120 into the trap body 101 in the axial direction, the cap body 120 is easily rotated into the trap body 101 by rotating the cap body 120 with respect to the trap body 101 in less than one revolution. Can be attached. On the other hand, when the cap body 120 is detached from the trap body 101, the operation of rotating the cap body 120 with respect to the trap body 101 in less than one round and then the operation of pulling out the cap body 120 with respect to the trap body 101 in the axial direction. The cap body 120 can be easily removed from the trap body 101. Therefore, the water-sealed trap 100 and its connecting mechanism of the present invention easily connect the trap body 101 and the cap body 120 to each other.

[Modification example]
The present invention is not limited to the above embodiment, and various modifications can be taken. Hereinafter, modifications of the present invention will be described. In each modification, the components having the same last two digits among the components shown by the three digits have the same or similar characteristics, and the description thereof will be partially omitted.

(1) The shape of the concave groove of the connecting mechanism of the present embodiment is not limited to the above embodiment. For example, as in the attachment / detachment device 200 (connecting mechanism) of FIG. 16A, the first facing wall surface 2135 facing the inclined wall surface 2133 does not have to be parallel to the inclined wall surface 2133. The attachment body 220 and the attachment body 201 can be easily attached and detached by the connection mechanism of the modified example.

(2) The shape of the concave groove of the connecting mechanism of the present embodiment is not limited to the above embodiment. For example, in the attachment / detachment device 300 (connecting mechanism) of FIG. 16B, the engagement projection 316 is formed not on the second facing wall surface 3135 but on the bottom wall surface 3132. Further, the inner peripheral surface 324 of the attachment body 320 is not provided with a contact step portion. The attachment body 320 and the attachment body 301 can be easily attached and detached by the connection mechanism of the modification.

(3) The shape of the concave groove of the connecting mechanism of the present embodiment is not limited to the above embodiment. For example, in the attachment / detachment device 400 (connecting mechanism) of FIG. 16C, the deep side of the second passage 415 is tapered. Then, in the connecting mechanism, the protruding piece 425 is locked to this tapered portion. That is, the other (deep side) end of the second passage 415 in the circumferential direction is defined by the locking wall surface 4131 formed in a tapered shape. Then, as shown in FIG. 16C, the projecting piece 425 is effectively maintained at the third point by being sandwiched from both axial directions in a state where the projecting piece 425 is locked to the locking wall surface 4131. obtain. The attachment body 420 and the attachment body 401 can be easily attached and detached by the connection mechanism of the modification.

(4) The attachment / detachment device and the connecting mechanism of the present invention are not limited to the configuration of the water-sealed trap of the above embodiment. For example, FIG. 17 shows a container with a lid 500 as a detachable device provided with the connecting mechanism of the present invention. The container 500 with a lid may be, for example, a water bottle or the like. The container 500 with a lid is composed of a container body 501, which is an attached body having a cylindrical or cylindrical tip shape extending in the axial direction, and a lid 520, which is a hollow tubular attached body that opens at one end in the axial direction. Become. The container body 501 and the lid 520 can be easily attached to and detached from each other by the connecting mechanism of the above embodiment.

[Second Embodiment]
(5) In the connecting mechanism of the present embodiment, the protruding piece is formed in the attachment portion of the attachment body (cap body), and the concave groove is formed in the attachment portion of the attachment body (trap body). The present invention is not limited to this, and the relationship is opposite to that of the above embodiment, that is, a protruding piece is formed in the attached portion of the attached body, and a concave groove is formed in the attached portion of the attached body. May be good. 18 and 19 show the attachment / detachment device 600 according to another embodiment of the present invention.

As shown in FIGS. 18 and 19, the attachment / detachment device 600 includes an attachment body 601 having a cylindrical or cylindrical tip shape extending in the axial direction, and a hollow tubular attachment body 620 opening at one end in the axial direction. The attachment body 601 and the attachment body 620 are detachably connected to each other. The connecting mechanism is attached by an inner peripheral surface 624 having a circular cross-sectional view of the attachment body 620, an attachment portion 623 having a concave groove 613 recessed in the inner peripheral surface 624, and the tip of the attachment body 601. An outer peripheral surface 612 having a substantially circular cross-sectional view to which the attachment portion 623 can be extrapolated, a protruding piece 625 protruding radially outward from the outer peripheral surface 612, and an axial base end of the adherend 601 from the protruding piece 625. The attachment portion 611 is located on the side and has an elastic pressure contact body 618 formed so as to be press-contactable with the inner peripheral surface 624 of the attachment portion 623.

The concave groove 613 has an opening end 6131 that is open to one end in the axial direction of the attachment portion 623 and can introduce the protruding piece 625 into the concave groove 613, and the other end in the axial direction of the attachment portion 623 so as to face the opening end 6131. It is formed on the side and is formed between the bottom wall surface 6132 extending along the circumferential direction. The concave groove 613 is connected to the first passage 614 extending from the opening end 6131 to the bottom wall surface 6132 with a predetermined width and the first passage 614 on the other end side in the axial direction of the attachment portion 623, and is connected along the bottom wall surface 6132. It consists of a second passage 615 extending in the circumferential direction. The first passage 614 is inclined at a predetermined angle with respect to the axial direction so as to face the opening end 6131, and the inclined wall surface 6133 extending from the opening end 6131 to the bottom wall surface 6132 and the first facing wall surface 6133 facing the inclined wall surface 6133. It extends from the wall surface 6134. The second passage 615 extends between the bottom wall surface 6132 and the second facing wall surface 6135 facing the bottom wall surface 6132 at a distance that can accommodate the projecting piece 625. One end of the second passage 615 in the circumferential direction communicates with the first passage 614, and the other end of the second passage 615 in the circumferential direction is defined by a locking wall surface 6136. The engaging projection 616 is formed on the second facing wall surface 6135.

When the attachment body 620 is attached to the attachment body 601, the attachment portion 623 is the axial base end of the attachment portion 611 with the projecting piece 625 introduced into the first passage 614 via the opening end 6131. Upon relative movement to the side, the inclined wall surface 6133 guides the protruding piece 625 to the first point where the inner peripheral surface 624 of the attachment body 623 and the pressure welding body 618 start the pressure welding, and the protruding piece 625 passes through the first point. After that, in a state where the pressure welding body 618 is crimped to the inner peripheral surface 624 of the attachment portion 623, the projecting piece 625 is guided to the second point where the projecting piece 625 and the bottom wall surface 6132 abut. Then, when the attachment portion 623 rotates in one direction with respect to the attachment portion 611 while the protrusion piece 625 is located at the second point, the protrusion piece 625 enters the second passage 615 and the protrusion piece 625 is engaged. Move to a third point locked to the stop wall 6136. That is, the connecting mechanism of another embodiment can function in the same manner as the connecting mechanism of one embodiment. Therefore, the attachment / detachment device 600 and the connection mechanism of another embodiment easily connect the attachment body 601 and the attachment body 620 to each other.

The present invention is not limited to the above-described embodiments and modifications, and can be carried out in various embodiments as long as it belongs to the technical scope of the present invention. That is, within the technical scope of the present invention, some configurations of the present embodiment may be omitted or modified, or other configurations may be added.

10 Arrangement structure 11 Equipment 12 Drainage system 13a, b Connection pipe 100 Water seal trap (detachable device)
101 Trap body (attached body)
102 Outer cylinder 103 Inner cylinder 104 Drain side connection part 105 Connecting wall 106 Flange 108 Water storage space 111 Attached part 112 Outer peripheral surface 113 Concave groove 1131 Opening end 1132 Bottom wall surface 1133 Inclined wall surface 1134 First facing wall surface 1135 Second facing wall surface 1136 Locking wall surface 114 1st passage 115 2nd passage 116 Engagement protrusion 118 Packing (pressure welding body)
120 Cap body (attachment body)
121 Cylinder wall 122 Bottom wall 123 Mounting part 124 Inner peripheral surface 125 Protruding piece 126 Pressure contact area 127 Contact step part

Claims (11)

A detachable attachment body having a cylindrical or cylindrical tip shape extending in the axial direction and having the tip side facing downward and a hollow tubular attachment body having an opening at one end in the axial direction facing upward. It is a connection mechanism for connecting to
An inner peripheral surface having a circular shape in cross-sectional view of the attached body, and an attached portion having a protruding piece that protrudes radially inward from the inner peripheral surface.
An outer peripheral surface having a substantially circular shape with a cross-sectional view in which the attachment portion can be externally inserted at the tip of the attachment body, a concave groove recessed in the outer peripheral surface, and the attachment body rather than the concave groove. It is formed so as to be able to be pressure-contacted in the radial direction with respect to the inner peripheral surface of the attachment portion by a pressure contact force that is located on the axial base end side of the attachment body and can prevent the attachment body from freely falling to the attachment body. With an attached portion having an elastic pressure contact body,
The concave groove has an open end that is open to the axial tip of the attachment portion and allows the protruding piece to be introduced into the concave groove, and a bottom wall surface that extends in the circumferential direction so as to face the open end. Formed between
The concave groove is connected to the first passage extending from the opening end to the bottom wall surface and the first passage on the axial base end side of the attachment portion, and extends in the circumferential direction along the bottom wall surface. It consists of a second passage
The first passage is inclined at a predetermined angle with respect to the axial direction so as to face the opening end, and the inclined wall surface extending from the opening end to the bottom wall surface and the first facing wall surface facing the inclined wall surface. Prolonged between and
The second passage extends between the bottom wall surface and the second facing wall surface facing the bottom wall surface at a distance that can accommodate the projecting piece, and one end in the circumferential direction of the second passage. Is communicated with the first passage side, and the other end in the circumferential direction of the second passage is defined by a locking wall surface.
When the attachment portion moves relative to the axial base end side of the attachment portion in a state where the protrusion piece is introduced into the first passage through the opening end, the protrusion piece moves to the attachment body. After the inner peripheral surface of the surface and the pressure contact body move to a first point where pressure contact starts in the radial direction and the projecting piece passes through the first point, the pressure contact body is free to move to the inner peripheral surface of the attachment portion. The projecting piece is guided to the second point where the projecting piece and the bottom wall surface abut by the inclined wall surface in a state of being crimped in the radial direction by a pressure contact force that can prevent the fall, and the projecting piece is brought to the second point. When the attachment portion rotates in one direction with respect to the attachment portion in the positioned state, the projecting piece enters the second passage, and the projecting piece is locked to the locking wall surface. A connecting mechanism characterized by moving to a point. The second facing wall surface is characterized by being provided with an engaging protrusion protruding into the second passage so as to prevent the protruding piece at the third point from moving toward the first passage side. The connection mechanism according to claim 1. On the inner peripheral surface of the attachment portion, a contact step portion that abuts on the pressure contact body from the tip side in the axial direction is formed, and when the projecting piece abuts on the bottom wall surface, the contact step portion is formed. The connecting mechanism according to claim 1 or 2, wherein the pressure-welded body is elastically compressed in the axial direction. A pressure contact region is formed on a part of the inner peripheral surface of the attachment portion so as to face the outer peripheral surface of the attachment portion and to be in pressure contact with the pressure contact body, and the contact step portion is adjacent to the pressure contact region. Is provided,
The connecting mechanism according to claim 3, wherein when the projecting piece is located at the third point, the contact step portion receives an urging force from the pressure contact body toward the tip end side in the axial direction. The connecting mechanism according to any one of claims 1 to 4, wherein the first facing wall surface extends in parallel with the inclined wall surface. One of claims 1 to 5, wherein the bottom wall surface faces the first facing wall surface and the second facing wall surface in the axial direction, and only the inclined wall surface faces the opening end. The connecting mechanism described in. The connecting mechanism according to any one of claims 1 to 6, wherein the attachment body is a cap body having an axial tip closed. The connecting mechanism according to any one of claims 1 to 6, wherein the attachment body is a cap body for receiving water having a water storage space and a bottom wall constituting the bottom of the water storage space. .. A cover having an outer cylinder that opens at the tip in the axial direction and extends in the axial direction, and an inner cylinder that opens at both ends in the axial direction and is inserted into the outer cylinder to extend in the axial direction and extends from the base end of the outer cylinder. With the attachment body,
A hollow tubular attachment body having a cylinder wall that opens at one end in the axial direction and a bottom wall that constitutes the bottom of the water storage space formed in cooperation with the attachment body.
The connecting mechanism according to any one of claims 1 to 8 for detachably connecting the attached body and the attached body is provided.
The base end of the outer cylinder and the outer periphery of the inner cylinder are closed by a connecting wall, and a drainage port connection portion communicating with the outer cylinder is formed at a position retracted from the tip of the inner cylinder. Water seal trap. An attached body having a cylindrical or cylindrical tip shape extending in the axial direction,
A hollow cylindrical attachment body that is extrapolated and fitted to the tip of the attachment body,
The attachment / detachment device comprising the connection mechanism according to any one of claims 1 to 8 for detachably connecting the attachment / detachment body to the attachment / detachment body. A detachable attachment body having a cylindrical or cylindrical tip shape extending in the axial direction and having the tip side facing downward and a hollow tubular attachment body having an opening at one end in the axial direction facing upward. It is a connection mechanism for connecting to
An inner peripheral surface having a circular shape in cross-sectional view of the attached body, and an attached portion having a concave groove recessed in the inner peripheral surface.
An outer peripheral surface having a substantially circular shape with a cross-sectional view in which the attachment portion can be externally inserted at the tip of the attachment body, a protruding piece protruding radially outward from the outer peripheral surface, and the attachment from the protruding piece. It is located on the axial base end side of the body and can be pressure-contacted in the radial direction with respect to the inner peripheral surface of the attachment part by the pressure contact force that can prevent the attachment body from freely falling to the attachment body. With an attachment portion having an elastic pressure contact formed,
The concave groove is open to one end in the axial direction of the attachment portion to allow the protruding piece to be introduced into the concave groove, and a bottom wall surface extending along the circumferential direction so as to face the open end. Formed between and
The concave groove is connected to the first passage extending from the opening end to the bottom wall surface and the first passage on the other end side in the axial direction of the attachment portion, and extends in the circumferential direction along the bottom wall surface. It consists of two passages
The first passage is inclined at a predetermined angle with respect to the axial direction so as to face the opening end, and the inclined wall surface extending from the opening end to the bottom wall surface and the first facing wall surface facing the inclined wall surface. Prolonged between and
The second passage extends between the bottom wall surface and the second facing wall surface facing the bottom wall surface at a distance that can accommodate the projecting piece, and one end in the circumferential direction of the second passage. Is communicated with the first passage, and the other end in the circumferential direction of the second passage is defined by a locking wall surface.
When the attachment portion moves relative to the axial base end side of the attachment portion in a state where the protrusion piece is introduced into the first passage through the opening end, the protrusion piece moves to the attachment body. After the inner peripheral surface of the surface and the pressure contact body move to a first point where pressure contact starts in the radial direction and the projecting piece passes through the first point, the pressure contact body is free to move to the inner peripheral surface of the attachment portion. The projecting piece is guided to the second point where the projecting piece and the bottom wall surface abut by the inclined wall surface in a state of being crimped in the radial direction by a pressure contact force that can prevent the fall, and the projecting piece is brought to the second point. When the attachment portion rotates in one direction with respect to the attachment portion in the positioned state, the projecting piece enters the second passage, and the projecting piece is locked to the locking wall surface. A connecting mechanism characterized by moving to a point.

Images