JP2010090690A - Draining trap structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure a large cleaning work space when required, mainly in a draining port or in the periphery thereof. <P>SOLUTION: This draining trap structure includes a bottomed cylindrical draining trap body 4 having an opening 2 on an upper face and the draining port 3 on a side face, and a water sealing structure part 5 provided in an inside of the draining trap body 4. The water sealing structure part 5 is provided with a water sealing outer cylinder part 7 extended upwards from a bottom face 6 side of the draining trap body 4, and a drain introducing inner cylinder 8 insertion-arranged from an upper side into an inside of the water sealing outer cylinder part 7. A draining space 11 is formed between a side face of the draining trap body 4 and the water seal outer cylinder part 7, and a water sealing space 12 is formed on the inside of the water sealing outer cylinder part 7. In the draining trap structure, at least the water sealing outer cylinder part 7 is constituted of another member different from that of the draining trap body 4, and the water sealing outer cylinder part 7 is constituted to be evacuated to an opposite side opposite to the draining port 3, in inside the draining trap body 4, at maintenance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drain trap structure.

  In recent years, all-electric facilities have spread in apartment buildings, and CO2 refrigerant heat pump water heaters and latent heat recovery type water heaters have spread as hot water supply methods. These water heaters are provided with a hot water tank for storing hot water. Then, a drainage facility is installed so that hot water in the hot water tank can be drained during maintenance. Such a drainage facility has a drainage trap on its entry side. This drain trap is preferably provided below the hot water tank.

  Generally, a drain trap includes a bottomed cylindrical container-shaped drain trap body having an opening on an upper surface and a drain port on a side surface, and a sealed structure provided inside the drain trap body. .

  The sealing structure includes an outer cylinder portion for sealing that extends upward from the bottom surface of the drain trap main body, and an inner cylinder for drainage introduction that is inserted from above into the outer cylinder portion for sealing water. There is something with a part. In this case, a drainage space is formed between the side surface of the drain trap body and the outer cylinder portion for sealing, and a sealing space is formed inside the outer cylinder portion for sealing.

  For example, Patent Document 1 discloses such a drain trap. In the drain trap of patent document 1, the outer cylinder part for sealing is integrally extended from the bottom face of the drain trap main body. Moreover, the outer cylinder part for sealing has the cylindrical shape with a notch surface which has a partial cylindrical surrounding wall part and a notch-like surface wall part. This outer cylinder part for sealing is installed in a state in which the notched surface wall part faces the drain port. On the other hand, the inner cylinder part for drainage introduction has a cylindrical shape having a cylindrical peripheral wall part.

According to such a configuration, the notched surface wall portion is provided in the portion facing the drain port of the outer cylinder portion for sealing, and the space between the drain port and the notched surface wall portion is provided by the notched surface wall portion. By enlarging, cleaning around the drain outlet can be facilitated.
Japanese Utility Model Publication No. 3-52858

  However, in the drain trap structure described in Patent Document 1, the outer cylinder portion for sealing is integrated (fixed) on the bottom surface of the drain trap body, so that the notched surface wall portion is formed in the outer cylinder portion for sealing water. However, it is difficult to secure a sufficient space (cleaning work space) between the drain port and the notched surface wall because there is a limit to the amount of possible notch in the notched surface wall. .

  In addition, since the cylindrical inner cylinder part for introducing drainage is installed inside the cylindrical part for sealing with a cylindrical shape with a notch, the gap between the two parts must be constant in the circumferential direction. Will not be able to. For this reason, there is a possibility that the flow of the drainage is deteriorated in the portion where the gap is narrow (the portion between the notched surface wall portion of the outer cylinder portion for sealing water and the inner cylinder portion for drainage introduction).

  On the other hand, when trying to eliminate the partial deterioration of the flow of drainage by expanding the part where the gap is narrow, for example, the outer cylinder part for sealing water and the drain trap body are increased in diameter or In addition, it is necessary to take measures such as reducing the diameter of the inner cylinder portion for introducing drainage. However, if this is done, the gaps in other parts will become too wide than the optimum value, and the outer diameter of the outer cylinder for sealing and the drain trap body will increase, leading to an increase in the size of the entire drain trap. As a result of reducing the diameter of the inner cylinder part for introducing the drainage, the amount of drainage inflow (or the amount of wastewater treatment) to the drain trap is reduced. Therefore, the drain trap may be inefficient because the overall balance is lost.

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a bottomed cylindrical container-shaped drain trap body having an opening on the top surface and a drain port on the side surface, and a drain trap body inside the drain trap body. A sealing water structure portion provided, and the sealing water structure portion extends upward from the bottom surface side of the drain trap body, and inside the sealing water outer cylinder portion. A drainage introduction inner cylinder portion inserted from above, and a drainage space is formed between the side surface of the drain trap body and the sealing outer cylinder portion, and the sealing outer cylinder portion In the drain trap structure in which a sealing water space is formed inside, at least the sealing outer cylinder part is configured by a member different from the drain trap body, and the sealing outer cylinder part is used during maintenance. The drain trap body is configured to be retractable to the opposite side of the drain port. It is characterized in that.

  The invention described in claim 2 is characterized in that, in the above, the outer cylinder portion for sealing has a cylindrical shape with a notched surface having a partial cylindrical peripheral wall portion and a notched surface wall portion, and the drainage introduction inner portion. The cylindrical portion has a cylindrical shape with a notched surface having a partial cylindrical peripheral wall portion and a notched surface wall portion, and the outer cylindrical portion for sealing and the inner cylindrical portion for drainage introduction are each notched surface wall portion. Is arranged in a double manner in a state in which the positions in the circumferential direction are aligned toward the drain outlet.

  According to a third aspect of the present invention, in the above, the bottom surface of the drain trap main body is provided with a convexly-shaped stabilization seat portion on the upper side, and the bottom wall portion is provided on the sealing outer cylinder portion. The bottom wall portion is provided with an upwardly convex stabilizing seat portion corresponding to the stabilizing seat portion, and sealing the bottom surface of the drain trap body by matching the both stabilizing seat portions. The bottom wall of the water outer cylinder is configured to be stably installed.

  According to a fourth aspect of the present invention, in the above, a lid member is detachably provided to the opening on the upper surface of the drain trap body, and the lid member has a drain passage portion through which drainage can be introduced, The drainage passage portion is provided with a wire mesh installation portion capable of installing a wire mesh.

  According to invention of Claim 1, the following effects can be acquired by the said structure. That is, the outer cylinder portion for water sealing constituted by a member different from the drain trap body is retracted to the opposite side of the drain port inside the drain trap body during maintenance. It is possible to secure a sufficiently large cleaning work space between the outer cylinder portion for sealing and the sealing water, thereby facilitating cleaning of the drain outlet and its surroundings. At this time, it is possible to clean the drain outlet and its surroundings without removing the sealing outer cylinder from the drain trap body or the drain introduction inner cylinder inside the sealing outer cylinder.

  According to invention of Claim 2, the following effects can be acquired by the said structure. That is, the outer cylinder portion for sealing water is arranged as a cylindrical shape with a notched surface having a partial cylindrical peripheral wall portion and a notched surface wall portion, with the notched surface wall portion facing the drain port, so that the drain port It is possible to secure a cleaning work space for the cut-out surface wall portion between the cut-out surface wall portion and to facilitate cleaning around the drain outlet. In addition, the outer cylinder part for sealing and the inner cylinder part for drainage introduction, both of which have a cylindrical shape with a notch surface, are doubled in a state where each notch-like surface wall part faces the drainage port and the circumferential position is aligned. By disposing, when the outer cylinder part for sealing water is retracted for maintenance, it becomes difficult for the outer cylinder part for sealing to interfere with the inner cylinder part for drainage introduction and cause mutual restraint. Therefore, since the movable range of the inner cylinder part for introducing drainage inside the outer cylinder part for sealing water is expanded, the handling of the outer cylinder part for sealing water and the inner cylinder part for drainage introduction at the time of retraction is facilitated. Cleaning of the mouth and its surroundings can be made easier. And by arranging the outer cylinder part for sealing and the inner cylinder part for drainage introduction in a state where each notch-shaped surface wall part is directed to the drainage port and the position in the circumferential direction is aligned, a gap between the two is provided. In order to prevent partial deterioration of the drainage flow and make the gap between the two substantially constant in the circumferential direction. Since there is no need to increase the diameter of the outer cylinder part or drain trap body or to reduce the diameter of the drain introduction inner cylinder part, the drain trap can be made efficient and well-balanced.

  According to invention of Claim 3, the following effects can be acquired by the said structure. That is, the drain trap body can be stably installed by the stabilization seat provided on the bottom surface of the drain trap body. In addition, the stability seat provided on the bottom surface of the drain trap body is matched with the stabilization seat provided on the bottom wall of the sealing outer cylinder, thereby sealing the water on the bottom surface of the drain trap body. The outer cylinder portion can be stably installed.

  According to invention of Claim 4, the following effects can be acquired by the said structure. That is, the drain trap body can be detachably attached to the opening on the upper surface. This lid member functions to introduce waste water into the drain trap body through the drain passage portion. Furthermore, when necessary, by installing a wire mesh in a wire mesh installation portion provided in the drainage passage portion, it becomes possible to positively prevent entry of dust and the like from the drainage passage portion.

  An object of the present invention is to make it possible to ensure a large cleaning work space at the drain outlet and its periphery when necessary.

  1 to 14 show a first embodiment of the present invention.

  <Configuration> First, the configuration will be described.

  The drain trap of the present invention is preferably provided below (directly below) the hot water tank drain. Thus, since it is provided below the drain outlet of the hot water tank, the drain trap is placed in a situation where it is difficult to disassemble it for maintenance or for the operator to perform visual work.

  The drain trap described above has the following configuration.

  That is, as shown in FIG. 1, the drain trap 1 has a bottomed cylindrical container-shaped drain trap body 4 having an opening 2 on the top surface and a drain port 3 on the side surface, and a drain trap body 4 inside the drain trap body 4. And a provided sealing structure 5.

  The sealing structure 5 includes a sealing water outer cylinder portion 7 extending upward from the bottom surface 6 side of the drain trap body 4, and a drainage water inserted from above into the sealing water outer cylinder portion 7. And an inner cylinder portion 8 for introduction. And by these structures, in the inside of the drain trap main body 4, the space 11 for drainage is formed between the side surface of the drain trap main body 4 and the outer cylinder part 7 for sealing water, The sealing water space 12 is formed inside.

  The basic configuration other than the above is as shown in the figure, but will be described briefly below.

  First, the drain trap body 4 is as shown in FIGS. 2 to 5 (refer mainly to FIG. 2). The drain trap body 4 has a cylindrical wall portion 15 on the side surface described above. Most of the lower part of the cylindrical wall portion 15 is constituted by the container portion 16 that forms the drainage space 11 and the sealing space 12 described above. Therefore, hereinafter, the container part 16 may be simply referred to as a cylindrical wall part 15.

  An intermediate attachment portion 17 (inner cylinder attachment portion) and an upper attachment portion 18 (lid attachment portion) are formed on the upper portion of the container portion 16 in order from the lower side. These are preferably provided concentrically as described below. The intermediate mounting portion 17 and the upper mounting portion 18 are configured such that the diameter dimension (mainly the inner diameter dimension) is sequentially increased with respect to the container portion 16 described above. In addition, the container part 16, the intermediate | middle attachment part 17, and the upper attachment part 18 are comprised by the (fixed) height dimension required in order to fulfill | perform each function.

  The drain port 3 described above is formed at one (at least) opening in the container portion 16 of the cylindrical wall portion 15. The drain port 3 is provided at a position slightly above the central portion in the height direction of the container portion 16. A drain pipe connection port 19 is provided around the drain port 3 to which a drain pipe (not shown) can be fitted and connected. The drain pipe connection port 19 is integrally projected from the outer peripheral surface of the cylindrical wall portion 15 outward in the radial direction. The drain port 3 has a diameter equal to the inner diameter of the drain pipe, and the drain pipe connection port 19 is configured to have an inner diameter equal to the outer diameter of the drain pipe.

  The drain trap 1 has a height of about 20 cm between the lower surface of the hot water tank and the installation floor in a state in which the axis 21 of the drain trap body 4 is substantially vertically directed, or more than that. It is installed in a very small space. At this time, the drain trap 1 is installed so that the drain pipe connection port 19 of the drain trap body 4 faces the outside of the hot water tank. The drainage pipe is installed with a required drainage gradient that allows the drainage to flow down.

  In addition, as shown in FIG. 1, the above-described sealed structure portion 5 is accommodated inside the drain trap body 4, and thus has a smaller diameter than the drain trap body 4. The drainage space 11 formed inside the drainage trap body 4 and outside the sealing structure 5 stores the drainage until it reaches the lower edge of the drainage port 3 and the lower edge of the drainage port 3. It is configured to function so as to let the waste water that exceeds the section flow down through the drain pipe (not shown).

  On the other hand, the water-sealing space 12 formed inside the water-sealing structure portion 5 stores drainage until reaching the upper end of the water-sealing outer cylinder portion 7 constituting the water-sealing structure portion 5. It is configured to function so as to overflow the drainage water beyond the upper end of the outside for sealing water into the drainage space 11. And it is comprised so that the water seal stored between the drain port 3 and the inlet_port | entrance part of the inner cylinder part 8 for waste_water | drain introduction | transduction may be performed with the water stored by this water-sealing structure part 5. FIG.

  Here, the outer cylinder part 7 for sealing which constitutes the sealing structure 5 is as shown in FIGS. 6 and 7 (refer mainly to FIG. 6). And in order to obtain the function as the sealing structure part 5 as described above, as shown in FIG. 1, the upper end part of the sealing outer cylinder part 7 is from the lower edge part of the drainage port 3. Is set to be lower than the opening 2 on the upper surface of the drain trap body 4. In this case, the upper end portion of the outer cylinder portion 7 for sealing water is set to be lower than the upper edge portion of the drain port 3.

  Moreover, the inner cylinder part 8 for the waste_water | drain introduction which comprises the water-sealing structure part 5 is made into what is shown by FIG. 8, FIG. 9 (refer mainly FIG. 8). The drainage introduction inner cylinder portion 8 needs to be fixed to the drain trap body 4. For this purpose, an inverted conical cylindrical water collecting portion 25 and a substantially horizontal flange-shaped main body attaching portion 26 are provided in order from the bottom on the upper portion of the drainage introducing inner cylindrical portion 8. Accordingly, the drainage-introducing inner cylinder portion 8 is configured as a part of a funnel-shaped integral inner cylinder member 27. As shown in FIG. 1, the inner cylinder portion 8 for introducing the drainage has a main body mounting portion 26 on the upper end side mainly formed on an intermediate step portion 28 formed inside the intermediate mounting portion 17 of the drain trap body 4. On the other hand, by being fitted from above, it is locked to the bottom.

  An annular seal member 29 is interposed between the lower surface side of the main body attachment portion 26 and the step lower surface of the intermediate step portion 28. Therefore, the main body attachment portion 26 has a stepped shape having a portion (small diameter portion) that can be fitted to the container portion 16 below a portion (large diameter portion) that can be fitted to the intermediate step portion 28. The seal installation step portion 31 extending in the circumferential direction is formed using a step portion between the large diameter portion and the small diameter portion. A seal member 29 is interposed in a compressed state with respect to the step portion 31 for seal installation. Therefore, the intermediate step portion 28 is formed so that the height dimension is slightly smaller than the sum of the height dimension of the large-diameter portion of the main body attachment portion 26 and the thickness of the seal member 29. For the seal member 29, a well-known member such as an O-ring or rubber packing can be used. In this case, in order to form the seal installation step portion 31, the main body attachment portion 26 is thicker than the other portion of the drainage introduction inner cylinder portion 8 by the amount of provision of the large diameter portion and the small diameter portion. Is formed.

  Then, the relationship between the sealing water outer cylinder part 7 and the drainage introduction inner cylinder part 8 will be described. The drainage introduction inner cylinder part 8 can be inserted and arranged inside the sealing water outer cylinder part 7. Therefore, the outer cylinder part 7 for sealing water is configured to have a larger diameter than the inner cylinder part 8 for introducing drainage, and the inner peripheral surface of the outer cylinder part 7 for sealing water and the inner cylinder part 8 for introducing drainage. A required gap 32 is formed between the outer peripheral surface and the outer peripheral surface of the outer peripheral surface in the radial direction.

  On the other hand, the lower end of the drainage-introducing inner cylinder 8 is not in contact with the bottom surface 6 of the drain trap body 4 or the bottom wall 33 of the outer cylinder 7 for sealing, which will be described later. In the axial direction (axis line 21), a required communication gap 34 is provided and spaced apart. The communication gap 34 is substantially the same as or smaller than the gap 32 between the outer cylinder portion 7 for sealing water and the inner cylinder portion 8 for drainage introduction.

  With such a configuration, the sealing water space 12 includes the outlet sealing portion 35 at the gap 32 between the sealing outer cylinder portion 7 and the drainage introduction inner cylinder portion 8, and the drainage introduction inner cylinder. The inlet side sealing portion 36 is provided inside the portion 8, and the outlet side sealing portion 35 and the inlet side sealing portion 36 are communicated with each other at the lower communication gap 34.

  Moreover, the upper end part (boundary part with the lower end part of the water collection part 25) of the inner cylinder part 8 for waste_water | drain introduction is substantially the same as the upper end part of the outer cylinder part 7 for sealing so that the above-mentioned gap | interval 32 may not become narrow. It is set at a position slightly higher than that, and the water collecting portion 25 and the main body attaching portion 26 at the upper part of the inner cylinder portion 8 for introducing the drainage are located in the outer cylinder portion 7 for sealing water inside the drainage trap main body 4. It is set so as to be accommodated in the space above the upper end in a state of expanding above the drainage space 11.

  In addition, each component (the drain trap main body 4, the outer cylinder part 7 for sealing, the inner cylinder part 8 for drainage introduction, the lid member 38 mentioned later, etc.) which comprises the drain trap 1 is each comprised by the resin molded product. .

  In addition to the basic configuration as described above, the present embodiment has the following configuration.

  (1) At least the sealing outer cylinder portion 7 is constituted by a member different from the drain trap body 4. And the outer cylinder part 7 for sealing is comprised so that it can evacuate to the opposite side to the drain outlet 3 inside the drain trap main body 4 at the time of a maintenance.

  That is, the drain trap body 4 and the sealing water outer cylinder part 7 are divided into parts, and the drain trap body 4 is used as a sealing water outer cylinder non-installation type drain trap body, and the sealing outer cylinder part 7 is The body-separated outer cylinder for water sealing. Then, the main body-separated type water-sealing outer cylinder portion is referred to as a retractable type water-sealing outer cylinder portion. As a result, the drainage trap 1 and the drainage trap 3 and the sealing outer cylinder part 7 are removed from the drain trap body 4 without removing the sealing outer cylinder part 7 and the draining inner cylinder part 8. In addition, it is assumed that it has a non-decomposable cleanable structure (or a non-decomposable easy-to-clean structure) that can secure a large cleaning work space (of course, it can be disassembled and cleaned) .

  For this purpose, first, an outer cylinder holding portion 41 capable of positioning and holding the sealing outer cylinder portion 7 at a predetermined set position inside the drain trap body 4 is provided. The outer cylinder holding part 41 is provided between the drain trap body 4 and the sealing outer cylinder part 7.

  In this case, the outer cylinder holding part 41 is formed in a protruding manner at the corner portion between the bottom surface 6 (the upper surface thereof) and the cylindrical wall part 15 (the inner peripheral surface thereof) inside the drain trap body 4. The rib 42 is used. The holding ribs 42 are extended toward the center of the drain trap body 4 (in the radial direction). The holding rib 42 has a length equal to the clearance 43 between the inner peripheral surface of the drain trap body 4 and the outer peripheral surface of the outer cylinder holding portion 41 in the radial direction.

  The holding rib 42 extends substantially vertically along the axis 21 of the drain trap body 4. The holding rib 42 includes a side surface holding portion 44 that can be held in contact with the side surface of the water sealing outer cylinder portion 7. The side surface holding portion 44 is in contact with the outer peripheral surface of the water sealing outer cylinder portion 7 and can be locked and held in the radial direction. The side surface holding portion 44 is a parallel portion 45 extending in a direction parallel to the axis 21 of the drain trap body 4. In addition, when this side surface holding part 44 is too high, when the outer cylinder part 7 for sealing water is retracted, the lifting amount of the outer cylinder part 7 for sealing water increases, so that it does not become too high in the vertical direction. It is preferable to do so. In this case, the minimum height that can hold the outer cylinder portion 7 for sealing water is set. More specifically, the side surface holding portion 44 has a height substantially equal to the thickness of a general portion (for example, a bottom wall portion 33 described later) of the water sealing outer cylinder portion 7.

  In addition, at least a part of the outer cylinder holding portion 41 described above is configured to be the retractable holding portion 46 that can retract the water-sealing outer cylinder portion 7 from the predetermined set position during maintenance.

  Therefore, above the side surface holding portion 44 of the holding rib 42 described above, the sealing outer cylinder portion 7 is guided to the above-described predetermined set position at the time of attachment, and at the time of retraction, the sealing outer cylinder portion. A guide portion 47 capable of guiding 7 toward the retracting direction is provided.

  The guide portion 47 is an inclined portion 48 that goes outward from the drain trap body 4 as it goes upward. In particular, at least for the guide portion 47 of the holding rib 42 located in the retracting direction of the sealing water outer cylinder portion 7, in order to ensure a larger initial retracting amount of the sealing water outer cylinder portion 7, The inclined portion 48 of the guide portion 47 is an inclined curved portion 49 having a gentle inclination angle inward and a steep inclination angle as it goes outward.

  More specifically, the above-described holding rib 42 is 90 degrees in the circumferential direction of the drain trap body 4 with respect to the position of the center 51 of the drain port 3 as shown in FIG. The three phases are provided in the circumferential direction. In this case, the retracting direction of the sealing outer cylinder portion 7 is set to a direction toward the position 180 degrees opposite to the drain port 3 of the drain trap body 4. Further, the side surface holding portion 44 of the holding rib 42 located at 90 degrees and 270 degrees in the circumferential direction of the drain trap body 4 from the center 51 of the drain port 3 is used for sealing against the radial direction perpendicular to the retreat direction. The outer cylinder part 7 is held. Further, the side surface holding portion 44 of the holding rib 42 located at a position of 180 degrees in the circumferential direction of the drain trap body 4 from the center 51 of the drain port 3 holds the sealing outer cylinder portion 7 in the retracting direction. It is said.

  In addition, about the part of the drain port 3, the outer cylinder holding part 41 for positioning and holding the outer cylinder part 7 for sealing with respect to the radial direction opposite to a retracting direction is required. For this reason, it is structurally possible to provide the same holding rib 42 as described above, but there is a risk that the rib size will increase or the cleaning operation will be hindered. Therefore, in order to prevent such a problem from occurring, in this case, as the outer cylinder holding part 41 different from the above, the bottom part of the sealing outer cylinder part 7 is provided along the bottom surface 6 of the drain trap body 4. An outward extension 53 directed toward the drainage port 3 is provided so that the radial positioning opposite to the above-described retraction direction can be performed between the outward extension 53 and the drain trap body 4. It is configured. As shown in FIG. 7, the outward extension 53 has a width dimension equal to the outer diameter of the sealing water outer cylinder portion 7, and has an arc shape that matches the inner peripheral surface of the drain trap body 4 at the tip. It is supposed to have an edge.

  (2) In the above, the outer cylinder portion 7 for water sealing has a cylindrical shape with a notched surface having a partial cylindrical peripheral wall portion 55 and a (at least one) notched surface wall portion 56 (notched surface). With cylinder). Similarly, the drainage-introducing inner cylinder portion 8 has a cylindrical shape with a notched surface having a partial cylindrical peripheral wall portion 57 and (at least one) notched surface wall portion 58 (cylindrical body with a notched surface). ). And the outer cylinder part 7 for water sealing and the inner cylinder part 8 for waste_water | drain introduction | transduction are arrange | positioned doubly in the state which match | combined the position of the circumferential direction with each notch-shaped surface wall part 56 and 58 toward the drain port 3 Yes.

  Here, as for the outer cylinder part 7 for sealing water and the inner cylinder part 8 for drainage introduction, the partial cylindrical peripheral wall parts 55, 57 and the notch-shaped surface wall parts 56, 58 are continuously connected in the circumferential direction. Yes. Since the outer cylinder part 7 for sealing water and the inner cylinder part 8 for drainage introduction are arranged concentrically with respect to the drain trap body 4, the most compact and rational structure is provided. It is configured as follows. Therefore, the predetermined set position of the sealing water outer cylinder portion 7 is determined by this concentric arrangement. The clearance 43 described above is formed between the inner peripheral surface of the drain trap body 4 and the outer peripheral surface of the partial cylindrical peripheral wall portion 55 of the outer cylinder holding portion 41.

  The both notched surface wall portions 56 and 58 are formed so as to extend in the extending direction (axial direction) of the axis 21 of the sealing outer cylinder portion 7 and the drainage introduction inner cylinder portion 8. Further, the both notched surface wall portions 56 and 58 are formed as surfaces which face in a substantially perpendicular direction with respect to the center 51 (center line) of the drain port 3 and are parallel to each other.

  Further, the notch of the notched surface wall portion 56 described above is such that the gap 32 between the outer cylinder portion 7 for sealing water and the inner cylinder portion 8 for drainage introduction is substantially uniform and optimal in the circumferential direction as a whole. The amount 60 and the notch amount of the notched surface wall portion 58 are set. That is, the two notched surface wall portions 56 and 58 are set so that the gap 32 between the two notched surface wall portions 56 and 58 is substantially equal to the gap 32 between the two partially cylindrical peripheral wall portions 55 and 57.

  In addition, the notch amount 60 of the notch-shaped surface wall portion 56 is indicated by the maximum value in the radial direction. In addition, since the notch-shaped surface wall portion 58 is provided in the drainage introduction inner cylinder portion 8, the shape of the upper portion corresponding to the notch-shaped surface wall portion 58 is formed in the water collecting portion 25 of the drainage introduction inner cylinder portion 8. A flat cut-out surface portion 59 for adjusting the angle is formed.

  In addition, by adopting a cylindrical shape with a notch surface, the drainage-introducing inner cylinder portion 8 has a non-uniform shape in the circumferential direction, and therefore, between the drain trap body 4 and the drainage-introduction inner cylinder portion 8. Is provided with a circumferential positioning portion 61 for positioning in the circumferential direction. As shown in FIGS. 8 and 9, the circumferential positioning portion 61 has a positioning projection 62 that protrudes at least in the radial direction from the main body attachment portion 26 of the drainage introducing inner cylinder portion 8. On the other hand, as shown in FIG. 2 and FIG. 3, positioning protrusions 62 are provided on the intermediate mounting portion 17 (inner intermediate step portion 28) and the upper step portion 81 of the drain trap body 4 as a circumferential positioning portion 61. The protrusion receiving part 63 which can be positioned in the circumferential direction by receiving the is provided. In this case, at least one positioning projection 62 and projection receiving portion 63 constituting the circumferential positioning portion 61 are provided at a position (position in the retreat direction) opposite to the drainage port 3 described above. In addition, since the projection receiving portion 63 is formed in the inner intermediate stepped portion 28 or the like, the outer side of the portion where the projection receiving portion 63 is provided in the intermediate mounting portion 17 can have a required strength. It is configured in a shape that partially protrudes outward (reinforcing outward protruding shape portion).

  (3) In the above, as shown in FIG. 1, an upwardly convex stabilizing seat 65 is provided on the bottom surface 6 of the drain trap body 4. On the other hand, the bottom wall part 33 is provided in the outer cylinder part 7 for water sealing. The bottom wall 33 is provided with an upwardly convex stabilizing seat 66 corresponding to the stabilizing seat 65. Then, the bottom wall portion 33 of the water sealing outer cylinder portion 7 can be stably installed on the bottom surface 6 of the drain trap body 4 by matching both the stability seat portions 65 and 66.

  That is, the stable installation structure portion is provided between the bottom surface 6 of the drain trap body 4 and the bottom wall portion 33 of the water sealing outer cylinder portion 7.

  Here, the bottom wall portion 33 of the outer cylinder portion 7 for sealing water can be placed in direct contact with the bottom surface 6 of the drain trap body 4. The bottom wall portion 33 of the sealing water outer cylinder portion 7 has a cylinder end closing portion 67 that can close the bottom surface 6 of the sealing water outer cylinder portion 7 to constitute a drainage receiver. Further, the above-described outward extending portion 53 is also a part of the bottom wall portion 33 of the water sealing outer cylinder portion 7. As shown in FIG. 7, the bottom wall portion 33 of the sealing outer cylinder portion 7 as a whole has a curved edge portion with a different radius of curvature in the retracted direction and the opposite direction in plan view. For example, a deformed oval type having edges parallel to both sides in a direction orthogonal to the retreat direction. The bottom wall portion 33 and the sealing outer cylinder portion 7 constitute an integral outer cylinder member 68.

  And as shown in FIG. 1, the stabilization seat part 65 of the bottom face 6 of the drain trap body 4 and the stabilization seat part 66 of the bottom wall part 33 of the outer cylinder part 7 for water sealing are aligned with each other. In such a state, they are configured so as to fit with each other without a gap and to have an overlapping position, shape and size. The both stabilizing seats 65 and 66 themselves can function as a positioning portion between the drain trap body 4 and the sealing outer cylinder 7, and the outer cylinder holding part 41 is further downsized. Therefore, the outer cylinder holding part 41 can be assisted (auxiliary outer cylinder holding part).

  Further, these both stabilizing seats 65 and 66 may have any shape, but preferably, in order to prevent the basic function of the drain trap 1 from being affected, the outer cylinder portion for sealing water is used. 7 is formed in such a size that it can be accommodated in the inner portion. In this case, the both stabilizing seats 65 and 66 have the shortest distance from the center of the drain trap body 4 (the position of the axis 21) to the notched surface wall portion 56 of the sealing outer cylinder portion 7 or It is provided as a partial spherical surface within a circular range having a radius less than that. The partial spherical seats 65 and 66 have a size that protrudes upward by the thickness of the bottom surface 6 of the drain trap body 4 and the bottom wall 33 of the outer cylinder portion 7 for sealing. It is supposed to be something. The heights of the two stabilizing seat portions 65 and 66 are substantially the same as the height of the parallel portion 45 of the side surface holding portion 44.

  Further, the partially spherical both stabilizing seats 65 and 66 are formed to have substantially the same thickness as the bottom wall portion 6 of the drain trap body 4 and the bottom wall portion 33 of the sealing outer cylinder portion 7. As a result, the lower surface sides of the both stabilizing seats 65 and 66 are recessed. Preferably, an injection gate at the time of injection molding of the drain trap body 4 and the sealing outer cylinder portion 7 is provided at the position of these concave portions so that the injection gate is not conspicuous from the outside.

  (4) In the above, the lid member 38 that can be attached to and detached from the opening 2 on the upper surface of the drain trap body 4 is provided. The lid member 38 has a drain passage portion 71 into which drainage can be introduced from the outside. The drainage passage portion 71 is provided with a wire mesh installation portion 73 capable of installing the wire mesh 72.

  Here, the lid member 38 is configured as shown in FIGS. The lid member 38 has a disk shape as a whole. More specifically, the lid member 38 includes an annular outer frame portion 74 and a cross-shaped portion 75 provided inside the outer frame portion 74. In this case, the cross-shaped portion 75 includes at least one annular cross-piece 76 and a space between the annular cross-piece 76 and the outer frame 74 or when there are a plurality of annular cross-pieces 76. A plurality of radial crosspieces 77 that connect the annular crosspieces 76 are provided. The drainage passage portion 71 is formed as a through hole formed between the cross-shaped portions 75.

  More specifically, in this case, the cross-shaped portion 75 includes a large and small double annular crosspiece 76, and six bridges that are installed between the double annular crosspieces 76 with an equal interval in the circumferential direction. And a radial crosspiece 77. Further, the drainage passage portion 71 has one circular shape inside the small-diameter annular crosspiece 76 and six arcs partitioned by the radial crosspiece 77 between the large and small double annular crosspieces 76. (Or fan-shaped). The small-diameter annular crosspiece 76 has substantially the same size as the drainage-introducing inner cylinder portion 8, and the large-diameter annular crosspiece 76 is integrated with the outer frame portion 74. The outer frame portion 74 and the plurality of annular crosspieces 76 are formed concentrically. The numbers of the annular crosspieces 76 and the radial crosspieces 77 are not limited to this. Further, the cross-shaped portion 75 is not limited to this, and may be a lattice shape.

  Further, the wire net installation unit 73 is provided on the lid member 38, for example. In the case of this embodiment, the wire mesh installation portion 73 is provided on the upper surface side of the lid member 38. More specifically, the wire mesh installation part 73 is formed in the upper part of the cross-shaped part 75. The wire mesh installation portion 73 is formed on the upper surface portion of the cross-shaped portion 75 and is configured as a wire mesh installation step portion 78 that is one step lower than the upper surface of the outer frame portion 74. The wire mesh installation stepped portion 78 is formed on the upper surface of the outer frame portion 74 so as to have a level difference that is as low as the thickness of the wire mesh 72. Corresponding to this (wire mesh installation step portion 78), the wire mesh 72 has a surface shape that is substantially equal to or slightly larger than the entire cross-shaped portion 75. Thus, the wire mesh 72 may be installed (mounted / fitted) from above on the wire mesh installation step 78 when necessary.

  The disc-shaped lid member 38 is engaged with the upper stepped portion 81 formed on the inner side of the upper mounting portion 18 of the drain trap body 4 from above so as to be locked downward. It has come to be. In addition, by attaching to the upper level | step-difference part 81, the cover member 38 will be installed concentrically with the drain trap main body 4 grade | etc.,.

  Further, the lid member 38 can be caused to function as a pressing member for the drainage-introducing inner cylinder portion 8 and the seal member 29. For this purpose, a lock mechanism portion 82 for fixing the lid member 38 is provided between the lid member 38 and the upper stepped portion 81. The lock mechanism portion 82 may be a screw mechanism having a male screw portion and a female screw portion. In this case, the lock mechanism portion 82 can be easily locked by rotating the lid member 38 by a required angle. It is a locking mechanism.

  This simple locking mechanism (locking mechanism portion 82) includes a locking claw portion 84 (see FIGS. 2 and 3) integrally projecting from the step side surface of the upper step portion 81 inward. A claw guide portion 85 is formed on the outer peripheral portion of the lid member 38 (the outer frame portion 74 thereof) so as to correspond to the locking claw portion 84.

  In this case, the locking claw portion 84 is a protrusion extending in the circumferential direction. The claw guide portion 85 has a groove shape that can accommodate the locking claw portion 84. The groove-shaped claw guide portion 85 includes, for example, a longitudinal guide portion 86 that can reach the lower surface side of the lid member 38 and can accommodate the locking claw portion 84 from above, and a lid member from the upper end portion of the longitudinal guide portion 86. A lateral guide portion 87 extending along the outer peripheral portion of the base plate 38 by a required angle in the circumferential direction is provided. In this case, the vertical direction guide part 86 is a vertical groove part, and the horizontal direction guide part 87 is a horizontal groove part. The upper end portion of the vertical guide portion 86 is set so as not to reach the upper surface side of the lid member 38. The groove width and the groove depth of the vertical guide portion 86 and the horizontal guide portion 87 are configured to match the shape of the locking claw portion 84, respectively. The lateral guide portion 87 has a gentle upward slope (gradient lateral groove) so that the above-described seal member 29 can be tightened into a compressed state (seal compression mechanism).

  More specifically, the lock mechanism portion 82 is provided at four locations having a phase of 90 degrees or less in the circumferential direction. In particular, the locking claw portion 84 is provided with a phase shift in the circumferential direction (in this case, a 45-degree shift) so as not to overlap the holding rib 42 in the vertical direction. Yes. The horizontal direction guide part 87 is formed in the part of the range of 90 degrees or less in the circumferential direction. However, the installation location and the number of installation of the lock mechanism portion 82 are not limited to this.

  The lid member 38 has a wall thickness required to form the claw guide portion 85 on the outer peripheral surface of the outer frame portion 74 or to provide the wire mesh installation step portion 78 above the cross-shaped portion 75. It has a thick wall as a whole. On the other hand, the upper step portion 81 formed inside the upper mounting portion 18 of the drain trap body 4 is configured such that the dimension in the extending direction of the axis 21 is slightly higher than the thickness of the lid member 38. Yes. Thereby, the upper surface of the lid member 38 is attached so as to be slightly lower than the opening 2 on the upper surface of the drain trap body 4.

  <Operation> Next, the operation of this embodiment will be described.

  (Assembly of drain trap 1) First, as shown in FIG. 1, the drain trap 1 is assembled. That is, the outer cylinder part 7 for sealing (outer cylinder member 68) and the inner cylinder part 8 for introduction of drainage (inner cylinder member 27) are inserted into the drain trap body 4 from above, and the drain trap body 4 The lid member 38 is attached to the opening 2 on the upper surface.

  When inserting and arranging the sealing water outer cylinder part 7 inside the drain trap body 4, first, the bottom wall part 33 of the sealing water outer cylinder part 7 is placed on the bottom surface 6 of the drain trap body 4. Try to place them tangentially. Then, when the stabilization seat portion 66 provided on the bottom wall portion 33 of the outer cylinder member 68 is fitted and matched with the stabilization seat portion 65 provided on the bottom surface 6 of the drain trap body 4, the drain trap body 4. The sealing water outer cylinder part 7 is stably installed on the bottom surface 6 and the sealing water outer cylinder part 7 is set at a predetermined set position.

  At this time, the outer cylinder holding part 41 provided between the drain trap body 4 and the sealing outer cylinder part 7 brings the sealing outer cylinder part 7 into a predetermined set position inside the drain trap body 4. Positioned and held. The positioning and holding of the sealing water outer cylinder part 7 is performed by the side surface holding part 44 of the holding rib 42 contacting the side surface (lower part) of the sealing water outer cylinder part 7 and locking in the radial direction. Is called.

  At this time, the guide portion 47 provided above the side surface holding portion 44 of the holding rib 42 guides the sealing outer cylinder portion 7 downward along the inclined portion 48 or the inclined curved portion 49, thereby sealing. The water outer cylinder portion 7 can be easily positioned at the predetermined set position described above.

  In addition, about the part of the drain port 3, positioning holding | maintenance is performed between the outward extension part 53 provided in the lower part of the outer cylinder part 7 for sealing, and the internal peripheral surface to which the drain trap main body 4 respond | corresponds.

  Next, when the drainage-introducing inner cylinder part 8 is inserted and arranged inside the sealing outer cylinder part 7, the main body mounting part 26 at the upper end of the drainage-introducing inner cylinder part 8 is placed in the middle of the drainage trap body 4. The intermediate stepped portion 28 formed on the inner side of the mounting portion 17 is fitted from above and locked to the lower side. At this time, an annular seal member 29 (not shown) is interposed between the seal installation step portion 31 formed on the lower surface of the main body attachment portion 26 and the step lower surface of the intermediate step portion 28.

  Further, the positioning projection 62 provided on the drainage introduction inner cylinder portion 8 is fitted into the projection receiving portion 63 provided on the intermediate step portion 28 of the drainage trap body 4, so that the drainage trap body 4 can be drained. The inner cylinder portion 8 is positioned in the circumferential direction.

  Finally, when attaching the lid member 38 to the opening 2 on the upper surface of the drain trap body 4, the disc-shaped lid member 38 is formed on the upper step portion formed inside the upper mounting portion 18 of the drain trap body 4. It is made to fit with respect to 81 from the upper part, and to be locked with respect to the lower part.

  At this time, the claw guide portion formed on the outer peripheral portion of the lid member 38 (the outer frame portion 74 thereof) with respect to the locking claw portion 84 integrally projecting inward from the step side surface of the upper step portion 81. The 85 vertical guide portions 86 are aligned from above, and the locking claw portion 84 is accommodated inside the vertical guide portion 86 until reaching the upper end portion. Thereafter, the lid member 38 is rotated along the lateral guide portion 87 by a required angle, so that the locking claw portion 84 is moved to the distal end side of the lateral guide portion 87 and is locked.

  Then, since the lateral direction guide portion 87 has a gentle upward slope, the lid member 38 is slightly displaced downward, whereby the drainage introducing inner cylinder portion 8 is pressed from above. At the same time, the sealing member 29 described above is indirectly tightened into a compressed state via the main body attaching portion 26 of the inner cylinder portion 8 for introducing drainage. As described above, since the seal member 29 is indirectly tightened, relative circumferential displacement does not occur between the seal member 29 and the main body attachment portion 26 of the drainage introduction inner cylinder portion 8. Since the sealing member 29 can be tightened in the state, it is possible to prevent the sealing member 29 from being damaged or deteriorated, to maintain the sealing performance for a long period of time, and to extend the component life of the sealing member 29. It becomes possible.

  (Installation of drain trap 1) The drain trap 1 assembled in this way is preferably located directly below (below the drain port 3 of the hot water tank of a hot water heater (for example, a CO2 refrigerant heat pump water heater or a latent heat recovery water heater). ) And so on. The drain trap 1 is installed in a space between the lower surface of the hot water tank and the installation floor with the axis 21 of the drain trap body 4 directed substantially vertically. At this time, the drain trap 1 is installed such that the drain pipe connection port 19 of the drain trap body 4 faces the outside of the hot water tank. Then, the drainage pipe is connected to the drainage pipe connection port 19 with a required drainage gradient that allows the drainage to flow down, so that drainage equipment is constructed.

  As described above, when the drain trap 1 is installed directly below the hot water tank, there is almost no need to worry about the entry of dust from the outside. The trap 1 is provided at the upper part of the lid member 38 in the case where there is a concern about the invasion of dust from the outside where at least a part of the trap 1 is exposed outside without being installed directly under the hot water tank. The wire mesh 72 is attached to the wire mesh installation portion 73.

  In addition, after the drain trap 1 is installed, water is put into the drain trap 1 so that the sealed structure 5 is sealed with water.

  (Draining hot water from the hot water tank) When the hot water tank is drained for maintenance of the water heater, the hot water drained from the hot water tank passes through the drainage passage portion 71 of the lid member 38 (when the wire mesh 72 is installed). , Which first passes through the wire mesh 72), and is collected by the water collecting portion 25 having the inverted conical cylindrical shape of the inner cylinder portion 8 for drainage introduction, and inside the inner cylinder portion 8 for drainage introduction (inlet sealing portion 36). And enters and distributes between the inner cylinder 8 for drainage introduction and the outer cylinder 7 for sealing water (outside sealing part 35) from the communication gap 34 on the lower side of the inner cylinder part 8 for introducing drainage. It overflows from the upper end of the outer cylinder part 7 for sealing water to the space between the outer cylinder part 7 for sealing water and the drain trap body 4 (drain space 11), and finally from the drain port 3 to the drain pipe. Will be drained.

  (Maintenance and cleaning of drainage facility and drain trap 1) Maintenance and cleaning of drainage facility and drain trap 1 are performed as follows. When the drain trap 1 is installed directly under the hot water tank, the worker inserts his arm into the narrow space between the hot water tank and the installation floor from the side where the drain port 3 is provided. Therefore, the work is performed in a state where it cannot be visually observed.

  First, the worker rotates the lid member 38 in the direction opposite to the above, and removes the lid member 38 from the opening 2 of the drain trap body 4 in the procedure opposite to the above. The lid member 38 can be easily removed if there is a space in which the arm can be inserted between the drain trap 1 and the hot water tank above it.

  Next, the inner cylinder part 8 for drainage introduction is lifted. The inner cylinder part 8 for drainage introduction is substantially free even if it is not pulled out from the drain trap body 4 by removing (disengaging) the upper body attachment part 26 from the intermediate step part 28 of the drain trap body 4. Therefore, it can be easily moved in the retreat direction or the like.

  When the drainage-introducing inner cylinder portion 8 is in the above-described free state, it can be directly touched from the outside through the gap formed between the intermediate step portion 28 and the main body attachment portion 26. Therefore, in this state, the sealing outer cylinder part 7 is slightly lifted and moved in the above-described retracting direction. At this time, the lifting amount of the sealing outer cylinder portion 7 may be a slight amount exceeding the height of the side surface holding portion 44 of the holding rib 42. Thus, the bottom wall portion 33 of the outer cylinder portion 7 for sealing water is guided along the guide portion 47 provided above the side surface holding portion 44 of the holding rib 42, and the outer cylinder portion 7 for sealing water is moved in the retracting direction. And can be moved.

  Then, since the outer cylinder part 7 for sealing water can be moved in the retracting direction until it contacts the drain trap body 4, the largest possible cleaning operation between the outer cylinder part 7 for sealing water and the drain port 3. Space can be secured. In this case, the maximum cleaning work space that can be secured is doubled the clearance 43 during assembly between the inner peripheral surface of the drain trap body 4 and the partial cylindrical peripheral wall portion 55 of the outer cylinder portion 7 for water sealing. The size is obtained by adding the notch amount 60 of the notched surface wall portion 56. By using the cleaning work space thus formed, the maintenance of the drain trap 1 and the cleaning work of drainage facilities such as the vicinity of the drain port 3 and the drain pipe can be performed. The drainage-introducing inner cylinder portion 8 that has become free is allowed to escape to a position within the movable range where it does not interfere with the sealing water outer cylinder portion 7 and cause mutual restraint. It ’s fine.

  By doing in this way, even if the drain trap 1 is installed in a situation where it is difficult to disassemble completely for cleaning work or maintenance, or for workers to perform visual work. Without draining or removing the drain introduction inner cylinder part 8 or the sealing water outer cylinder part 7 from the drain trap body 4, the drain introduction inner cylinder part 8 or the sealing water inside the drain trap body 4 can be removed. By simply putting the outer cylinder part 7 in the retracted state, cleaning work and maintenance for the drain trap 1 and the drainage facility can be easily performed.

  When there is a sufficient space above the drain trap 1, the drain introduction inner cylinder portion 8 and the sealing outer cylinder portion 7 can be pulled out or removed from the drain trap body 4. Of course, it is only necessary to remove the drain-introducing inner cylinder portion 8 and the sealing-water outer cylinder portion 7 from the drain trap body 4 to perform cleaning work and maintenance.

  In addition, after the maintenance is completed, the drain trap 1 is assembled as it is. At this time, as described above, the drainage-introducing inner cylinder part 8 and the sealing water outer cylinder part 7 are in a semi-assembled state in which they are not completely pulled out from the drain trap body 4, and Between the tube portion 7 and the drain trap body 4, there are provided structures that serve as guides such as the stabilizing seat portions 65, 66 and the outer tube holding portion 41, so that they can be assembled relatively easily. Can do.

  According to this embodiment, the following operational effects can be obtained.

  (1) A bottomed cylindrical container-shaped drain trap body 4 having an opening 2 on the upper surface and a drain port 3 on a side surface, and a sealing structure 5 provided inside the drain trap body 4, The sealing water structure portion 5 extends upward from the bottom surface 6 side of the drain trap body 4 and the sealing water outer cylinder portion 7 and the drainage water inserted into the sealing water outer cylinder portion 7 from above. A drainage space 11 is formed between the side surface of the drain trap body 4 and the sealing outer cylinder part 7, and is sealed inside the sealing outer cylinder part 7. In the drain trap structure in which the water space 12 is formed, at least the outer cylinder portion 7 for sealing water is constituted by a member different from the drain trap body 4, and the outer cylinder portion 7 for sealing water is used as a drain trap during maintenance. Since the inside of the main body 4 can be retracted to the opposite side to the drain port 3, the following operation is possible. Effect can be obtained.

  That is, the outer cylinder portion 7 for water sealing constituted by a member different from the drain trap body 4 is retracted to the side opposite to the drain port 3 inside the drain trap body 4 during maintenance. Thus, a sufficiently large cleaning work space can be secured between the drain port 3 and the outer cylinder portion 7 for sealing, and thus the drain port 3 and its surroundings can be easily cleaned. At this time, the drain port 3 and its surroundings are cleaned without removing the sealing outer cylinder part 7 and the drain introduction inner cylinder part 8 inside the sealing outer cylinder part 7 from the drain trap body 4. Is possible. Needless to say, the above-described cleaning work space does not need to appear during normal use of the drain trap 1.

  (2) In the above, the outer cylinder portion 7 for sealing water has a cylindrical shape with a notched surface having a partial cylindrical peripheral wall portion 55 and a notched surface wall portion 56, and the inner cylinder portion 8 for drainage introduction is a partial It has a cylindrical shape with a notched surface having a cylindrical peripheral wall portion 57 and a notched surface wall portion 58, and the outer cylinder portion 7 for sealing water and the inner cylinder portion 8 for drainage introduction each have the notched surface wall portions 56, 58. Due to the double arrangement with the circumferential position aligned toward the drain port 3, the following operational effects can be obtained.

  That is, the outer cylinder portion 7 for water sealing is arranged in a state in which the notched surface wall portion 56 faces the drain port 3 as a cylindrical shape with a notched surface having a partial cylindrical peripheral wall portion 55 and a notched surface wall portion 56. Accordingly, a cleaning work space corresponding to the notched surface wall portion 56 can be ensured (always) between the drain port 3 and the notched surface wall portion 56, and cleaning around the drain port 3 can be facilitated. .

  In addition, the outer cylinder portion 7 for sealing and the inner cylinder portion 8 for drainage introduction, both of which have a cylindrical shape with a notch surface, are aligned in the circumferential direction while the notch-like surface wall portions 56 and 58 face the drain port 3. When the outer cylinder part 7 for sealing is retracted for maintenance, the outer cylinder part 7 for sealing interferes with the inner cylinder part 8 for drainage introduction and is mutually restrained. Since it is difficult to occur, the movable range (relative to the radial direction) of the drainage-introducing inner cylinder portion 8 on the inner side of the sealing water outer cylinder portion 7 is expanded, so The handling of the cylinder part 7 and the inner cylinder part 8 for introducing drainage can be facilitated, and the drainage port 3 and its surroundings can be further easily cleaned.

  And the outer cylinder part 7 for sealing water and the inner cylinder part 8 for waste_water | drain introduction | transduction are arrange | positioned doubly in the state where each notch-shaped surface wall part 56 and 58 faces the drain outlet 3, and the position of the circumferential direction was suitable. This makes it possible to make the gap 32 between the two substantially constant and optimal in the circumferential direction, thereby preventing a partial deterioration of the drainage flow and making the gap 32 between the two substantially in the circumferential direction. Since it is not necessary to increase the diameter of the outer cylinder part 7 for sealing water or the drain trap body 4 or to reduce the diameter of the inner cylinder part 8 for drainage introduction in order to make it constant, the drain trap 1 is efficiently used. And well-balanced.

  (3) In the above, the bottom surface 6 of the drain trap body 4 is provided with an upwardly convex stabilizing seat portion 65, and the water sealing outer cylinder portion 7 is provided with a bottom wall portion 33. The portion 33 is provided with an upwardly convex stabilizing seat 66 corresponding to the stabilizing seat 65, and by sealing both the stabilizing seats 65, 66, the bottom 33 of the drain trap body 4 is sealed. Since the bottom wall portion 33 of the water outer cylinder portion 7 is configured to be stably installed, the following operational effects can be obtained.

  That is, the drain trap body 4 can be stably installed by the stabilizing seat 65 provided on the bottom surface 6 of the drain trap body 4. Further, the stabilization seat portion 65 provided on the bottom wall portion 33 of the sealing outer cylinder portion 7 is matched with the stabilization seat portion 65 provided on the bottom surface 6 of the drain trap body 4, whereby the drain trap body 4. The sealing water outer cylinder portion 7 can be stably installed on the bottom surface 6.

  It should be noted that the drainage trap body 4 and the sealing portion 65 and 66 are placed against the bottom surface 6 of the drainage trap body 4 and the recess formed on the lower surface side of the bottom wall part 33 of the sealing outer cylinder part 7. By setting the injection gate when the outer cylinder part 7 for water injection is formed, the bottom surface 6 of the drain trap body 4 and the flat part of the bottom wall part 33 of the outer cylinder part 7 for water sealing are formed after molding. It is possible to prevent gate traces from being generated, thereby reducing product quality and preventing installation stability.

  (4) In the above, the lid member 38 is detachably provided to the opening 2 on the upper surface of the drain trap body 4, and the lid member 38 has the drain passage portion 71 into which drainage can be introduced, and the drain passage portion 71. In addition, since the wire mesh installation portion 73 capable of installing the wire mesh 72 is provided, the following effects can be obtained.

  That is, the drain trap body 4 can detachably attach the lid member 38 to the opening 2 on the upper surface. The lid member 38 functions to introduce drainage into the drain trap body 4 through the drain passage part 71. Furthermore, when necessary, by installing the wire mesh 72 in the wire mesh installation portion 73 provided in the drainage passage portion 71, it becomes possible to actively prevent intrusion of dust and the like from the drainage passage portion 71. . In particular, when the wire mesh 72 is provided on the upper surface side of the lid member 38, the wire mesh 72 can be easily attached to the lid member 38 from above. Further, it is possible to adopt a configuration in which installation or non-installation of the wire mesh 72 can be selected.

  15 to 27 show a second embodiment of the present invention.

<Configuration> First, the configuration will be described.
This embodiment is a modification obtained by partially modifying the first embodiment, and has the following features.

  (A) First, as shown in FIGS. 15 and 16, the wire mesh 72 is installed on the lower surface side of the lid member 38.

  With this configuration, the wire mesh 72 is interposed (or sandwiched) between the lid member 38 and the main body attachment portion 26 of the drainage introduction inner cylinder portion 8. For this purpose, for example, a wire mesh installation portion 73 (wire mesh installation step portion 78) is provided on the lower surface side of the lid member 38 as shown in FIG. Alternatively, as shown in FIG. 15, the wire net installation portion 73 is provided on the upper surface of the main body attachment portion 26 of the drainage introduction inner cylinder portion 8 that is in contact with the lower surface of the lid member 38 (FIGS. 20 to 23). See also). Alternatively, the wire mesh installation portion 73 is provided separately on both the lower surface side of the lid member 38 and the upper surface of the main body attachment portion 26 described above.

  Here, when the wire mesh installation part 73 is provided in the main body attachment part 26 of the inner cylinder part 8 for introducing drainage, the wire mesh installation part 73 can be provided by using the step part 31 for seal installation. That is, by making the thickness of the main body mounting portion 26 substantially constant (thickness substantially equal to that of the other portions) and providing the seal installation step portion 31, It is possible to simultaneously form a wire mesh installation stepped portion 78 that becomes the wire mesh installation portion 73 on the upper surface side. Thereby, the step part 31 for seal installation and the wire mesh installation part 73 can be formed collectively, and the shape of the main body attachment part 26 is rationalized. Along with this, the position of the step portion 31 for installing the seal is slightly changed (moved) to the inner peripheral side as compared with the case of the first embodiment. By using the sealing member 29 having a shape adapted to the change in position, it is possible to cope with the change in design.

  In this case, as shown in FIGS. 17 to 19, the lid member 38 is formed in a ring shape only with the outer frame portion 74 and without the cross-shaped portion 75 (however, the cross-shaped portion 75 does not exist). May be). In addition, on the upper surface side of the lid member 38, at least one operation projection 91 that serves as a clue to a rotation operation when the lid member 38 is attached and detached is provided. In this case, the operation protrusion 91 is integrally formed so as to protrude toward the upper surface and inner peripheral surface side of the outer frame portion 74. The operation protrusions 91 are preferably provided so as to form a pair with the diameter direction of the lid member 38 so that a couple can be applied to the lid member 38. Here, a plurality of pairs (two in total, four in total) are provided with an interval of 90 degrees in the circumferential direction with respect to the outer frame portion 74.

  (B) Next, as shown in FIG. 23, a lid loosening prevention structure portion 93 that can suppress / prevent loosening of the lid member 38 due to an external force such as vibration is provided.

  In other words, the lid member 38 is locked by the lock mechanism 82 by an external force such as vibration against the lid member 38 on which an upward elastic force is exerted by the compressed seal member 29 in a state of being attached to the drain trap body 4. A lid loosening prevention structure portion 93 that can suppress / prevent loosening of the state is provided.

  More specifically, as the first lid loosening prevention structure portion 93, the lower surface of the lid member 38, and the upper surface of the main body attachment portion 26 of the drainage introduction inner cylinder portion 8 that is in contact with the lower surface of the lid member 38 The frictional force generation / increase portion 94 is provided between the contact surfaces (between the contact surfaces).

  The frictional force generating / increasing portion 94 includes a lower surface of the lid member 38 (the outer frame portion 74), and an upper surface of the main body attachment portion 26 of the drainage introducing inner cylinder portion 8 that is in contact with the lower surface of the lid member 38. The non-smooth surface portion 95 for generating / increasing the frictional force formed on at least one of them. The non-smooth surface portion 95 is configured by an uneven surface shape portion having an eye roughness enough to secure a frictional force necessary to suppress / prevent loosening of the lock mechanism portion 82 due to external force such as vibration. It is assumed that the uneven surface shape portion has a degree of eye roughness that does not require excessive force when the lid member 38 is removed from the drain trap body 4. The optimal eye roughness of the uneven surface shape portion can be obtained, for example, by performing computer analysis or trial and error using a prototype.

  Further, as shown in FIGS. 24 to 26, as the second lid loosening prevention structure portion 93, between the locking claw portion 84 constituting the locking mechanism portion 82 for the lid member 38 and the claw guide portion 85, A lock fixing portion 96 capable of holding the lock mechanism portion 82 in a fixed state is provided.

  The lock fixing portion 96 is a projection receiving portion 97 provided on one of the locking claw portion 84 and the claw guide portion 85, and a projection receiving portion provided on the other of the locking claw portion 84 and the claw guide portion 85. It is constituted by a recess 98 or the like. The fixing projection 97 and the projection receiving recess 98 are fitted and locked to each other so as to generate a locking force necessary to suppress / prevent loosening of the lock mechanism portion 82 due to an external force such as vibration. Be of the correct shape and size. In addition, it is preferable that the fixing protrusion 97 and the protrusion receiving recess 98 are configured such that a lock can be confirmed by generating a required moderation feeling when fitting and separating. The fixing protrusion 97 and the protrusion receiving recess 98 have such a size that excessive force is not required when the lid member 38 is removed from the drain trap body 4. The optimum sizes of the fixing protrusion 97 and the protrusion receiving recess 98 can be obtained by, for example, computer analysis or trial and error using a prototype.

  In this case, the claw guide portion 85 of the lock mechanism portion 82 has a protruding shape. The protrusion-shaped claw guide portion 85 has a substantially L shape in side view extending along the outer peripheral portion of the lid member 38 by a required angle in the circumferential direction. A vertical guide portion 86 is formed on the outer end portion of the L-shaped vertical arm portion, and a horizontal guide portion 87 is formed on the upper surface of the L-shaped horizontal arm portion. . The vertical guide 86 is a vertical guide (vertical guide), and the horizontal guide 87 is a horizontal guide (horizontal guide). The lateral guide 87 is loosely raised toward the L-shaped vertical arm so that the sealing member 29 can be tightened into a compressed state (seal compression mechanism) when the lid member 38 is attached. It has a slope (a lateral guide surface with a slope).

  In this case, the fixing protrusion 97 described above is provided (on the upper surface side) of the lateral guide portion 87 (is integrally formed), and the protrusion receiving recess 98 is on the lower surface side of the locking claw portion 84. (Provided integrally with each other). However, contrary to the above, the fixing projection 97 may be provided on the lower surface side of the locking claw portion 84 and the projection receiving recess 98 may be provided on the lateral guide portion 87 (the upper surface side thereof). Further, the fixing projection 97 and the projection receiving recess 98 are provided at least one at a position where they are fitted and locked with each other when the lid member 38 is locked by the lock mechanism 82. Alternatively, a plurality of fixing projections 97 and projection receiving recesses 98 (the same number or different numbers) may be provided.

  It should be noted that at least one of the first lid loosening prevention structure portion 93 and the second lid loosening prevention structure portion 93 may be provided. Further, when both the first lid loosening prevention structural portion 93 and the second lid loosening prevention structural portion 93 are provided, the locking mechanism portion 82 due to external force such as vibration is suppressed / prevented together. What is necessary is just to comprise so that it can do.

  Other configurations are the same as those in the above embodiment.

<Operation> Next, the operation of this embodiment will be described.
(Assembly of drain trap 1) (Installation of drain trap 1) (Draining hot water from the hot water tank) For each of these items, the point that the metal mesh 72 was installed on the lower surface side of the lid member 38 (the metal mesh in front of the lid member 38) 72), and the function of the lid loosening prevention structure 93 is substantially the same as the operation of the first embodiment, so that the description of the first embodiment is read as such. The description here is omitted. The changes will be described later.
(Maintenance and Cleaning of Drainage Facility and Drainage Trap 1) Hereinafter, the procedure of this item will be briefly described with reference to FIGS. 27A to 27H. Since other contents are substantially the same as those in the first embodiment, description thereof is omitted here.

  First, from the state shown in FIG. 27A, the worker rotates the cover member 38 in the direction of detaching to release the lock mechanism 82, and, as shown in FIG. 27B, removes the cover member 38 from the opening 2 of the drain trap body 4. The metal net 72 of FIG. 27C is exposed to be removed. At this time, the operator operates the lid member 38 using the operation projection 91.

  Next, the wire mesh 72 is removed from the opening 2 of the drain trap body 4 in the state of FIG. 27C, and the drain introduction inner cylinder portion 8 of FIG. 27D is exposed. Then, from the state of FIG. 27D, as shown in FIG. 27E, the drainage-introducing inner cylinder portion 8 is lifted.

  When the drainage-introducing inner cylinder portion 8 is lifted into a free state, it can be directly touched from the outside through the gap formed between the intermediate step portion 28 and the main body attachment portion 26. Therefore, as shown in FIG. 27F, the sealing outer cylinder portion 7 is slightly lifted and moved in the retracting direction.

  Then, since the outer cylinder part 7 for sealing water can be moved in the retracting direction until it contacts the drain trap body 4, the largest possible cleaning operation between the outer cylinder part 7 for sealing water and the drain port 3. Space can be secured. As shown in FIG. 27G, maintenance work of the drain trap 1 and cleaning of drainage facilities such as the drain outlet 3 and the drain pipe, etc. as shown in FIG. I do.

  According to this embodiment, the following operational effects can be obtained.

  (A) By holding the wire mesh 72 on the lower surface side of the lid member 38, the wire mesh 72 is held by the lid member 38 (between the outer frame portion 74 thereof and the body attachment portion 26 of the drainage introducing inner cylinder portion 8). Can be held securely. Thereby, it is possible to fix the wire mesh 72 and to prevent the wire mesh 72 from coming off. Even in this structure, installation / non-installation of the wire mesh 72 can be selected.

  (B) By providing the lid loosening prevention structure portion 93, it is possible to suppress and prevent the lid member 38 from being loosened by an external force such as vibration. That is, by providing the lid loosening prevention structure portion 93 to the lid member 38 on which the upward elastic force by the compressed seal member 29 is applied in the state of being attached to the drain trap body 4, an external force such as vibration is used. It can be suppressed / prevented that the locking state of the lid member 38 by the locking mechanism 82 is loosened (gradually loosened).

  More specifically, the first lid loosening prevention structure is provided between the lower surface of the lid member 38 and the upper surface of the main body mounting portion 26 of the drainage-introducing inner cylinder portion 8 that is in contact with the lower surface of the lid member 38. By providing the frictional force generating / increasing part 94 as the part 93, the frictional force generated / increased by the frictional force generating / increasing part 94 is used to suppress / prevent loosening of the locked state of the lid member 38. be able to. The frictional force generating / increasing portion 94 (non-smooth surface portion 95) is provided on the lower surface of the lid member 38 and the upper surface of the body attachment portion 26 of the drainage introduction inner cylinder portion 8 when the lid member 38 is attached to the drain trap body 4. Will function by abutting.

  Further, as the second lid loosening prevention structure portion 93, a lock fixing capable of fixing the lock mechanism portion 82 between the lock claw portion 84 constituting the lock mechanism portion 82 of the lid member 38 and the claw guide portion 85. By providing the portion 96, it is possible to suppress / prevent loosening of the locked state of the lid member 38 using the fixing force of the lock fixing portion 96. The lock fixing portion 96 is configured such that when the lid member 38 is attached to the drain trap body 4, the fixing protrusion 97 and the protrusion receiving recess 98 are engaged (or the engagement is not released). Will function.

  As mentioned above, although the Example of this invention has been explained in full detail with drawing, when there exists a term of "etc." in a sentence, it is used by the meaning containing the equivalent thing. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

It is a longitudinal section of the drain trap structure concerning the 1st example of the present invention. It is a longitudinal cross-sectional view of the drain trap main body of FIG. FIG. 3 is a plan view of FIG. 2. FIG. 3 is a side view of FIG. 2. FIG. 3 is a partially enlarged longitudinal sectional view showing a locking claw portion of FIG. 2. It is a longitudinal cross-sectional view of the outer cylinder part for sealing of FIG. FIG. 7 is a plan view of FIG. 6. It is a longitudinal cross-sectional view of the inner cylinder part for waste_water | drain introduction | transduction of FIG. It is a top view of FIG. It is a longitudinal cross-sectional view of the lid member of FIG. It is a top view of FIG. It is a side view of FIG. It is the elements on larger scale of the vertical groove part of FIG. It is the elements on larger scale of the edge part of a horizontal groove part of FIG. It is a disassembled perspective view of the drain trap structure concerning Example 2 of this invention. It is the disassembled perspective view which looked at FIG. 15 from diagonally lower side. It is a top view of the lid member of FIG. FIG. 18 is a side sectional view of FIG. 17. It is a side view of FIG. It is a longitudinal cross-sectional view of the inner cylinder part for waste_water | drain introduction | transduction of FIG. It is a top view of FIG. It is a bottom view of FIG. It is the elements on larger scale of the 1st lid loosening prevention structure part. It is an exploded view which shows the 2nd lid loosening prevention structure part. It is the elements on larger scale of the cover member of FIG. It is the elements on larger scale of the drain trap main body of FIG. It is a perspective view which shows the decomposition | disassembly process of a drain trap. It is a decomposition | disassembly process figure following FIG. 27A. FIG. 28B is an exploded process diagram following FIG. 27B. FIG. 27B is an exploded process diagram following FIG. 27C. It is a decomposition | disassembly process figure following FIG. 27D. It is a decomposition | disassembly process figure following FIG. 27E. It is a decomposition | disassembly process figure following FIG. 27F. It is a decomposition | disassembly process figure following FIG. 27G.

DESCRIPTION OF SYMBOLS 1 Drain trap 2 Opening part 3 Drain outlet 4 Drain trap body 5 Sealing structure part 6 Bottom face 7 Outer cylinder part for sealing 8 Inner cylinder part for drainage introduction 11 Drainage space 12 Sealing space 33 Bottom wall part 38 Lid member 55 Partial cylindrical peripheral wall 56 Notched surface wall 57 Partial cylindrical peripheral wall 58 Notched surface wall 65 Stabilization seat 66 Stabilization seat 71 Drain passage portion 72 Wire mesh 73 Wire mesh installation portion

Claims (4)

A bottomed cylindrical container-shaped drain trap body having an opening on the top surface and a drain outlet on the side surface;
A sealing structure provided inside the drain trap body,
The water sealing structure part extends upward from the bottom side of the drain trap body, and the water sealing outer cylinder part is inserted into the water sealing outer cylinder part from above and disposed therein. With
A drainage space is formed between the side surface of the drain trap body and the outer cylinder portion for sealing,
In the drain trap structure in which a sealing water space is formed inside the sealing outer cylinder,
At least the outer cylinder portion for sealing is constituted by a member different from the drain trap body,
A drain trap structure, wherein the sealing outer cylinder portion is configured to be retractable to a side opposite to the drain port inside a drain trap body during maintenance. The outer cylinder portion for sealing water has a cylindrical shape with a notched surface having a partial cylindrical peripheral wall portion and a notched surface wall portion,
The drainage-introducing inner cylinder part has a cylindrical shape with a notch surface having a partial cylindrical peripheral wall part and a notch-like surface wall part,
The outer cylinder part for sealing water and the inner cylinder part for drainage introduction are arranged in a double manner in a state in which the respective notched surface wall parts are aligned in the circumferential direction toward the drainage port. The drain trap structure according to claim 1. On the bottom surface of the drain trap body, a convexly shaped stabilizing seat is provided above,
The outer cylinder portion for sealing is provided with a bottom wall portion, and the bottom wall portion is provided with an upwardly convex stabilizing seat portion corresponding to the stabilizing seat portion,
The bottom wall portion of the outer cylinder portion for sealing is configured to be stably installed on the bottom surface of the drain trap body by matching the both stabilizing seat portions. The drain trap structure according to claim 2. A lid member is detachably provided to the opening on the drain trap body upper surface,
The lid member has a drain passage portion through which drainage can be introduced,
The drainage trap structure according to any one of claims 1 to 3, wherein the drainage passage part is provided with a metal mesh installation part capable of installing a metal mesh.

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