JP5909966B2 - Pump and cleaning device - Google Patents

Description

  The present invention relates to a pump configured to pump a fluid by rotation of a pair of gears meshed with each other, and more particularly, from a suction port for sucking fluid into a pump chamber containing the gear and from the pump chamber Each of the discharge ports for discharging a fluid relates to a pump having a larger diameter toward the pump chamber side. Moreover, this invention relates to the washing | cleaning apparatus provided with this pump for injecting washing water from a washing nozzle to the toilet user's buttocks.

  2. Description of the Related Art A cleaning device that is installed in a toilet and for cleaning by spraying cleaning water from a cleaning nozzle onto the buttocks of a toilet user is well known. As a pump for supplying cleaning water to the cleaning nozzle, a so-called gear pump configured to pump cleaning water by rotation of a pair of gears engaged with each other is widely used.

  The gear pump has a pump chamber inside, a casing having a suction port for sucking cleaning water into the pump chamber, a discharge port for discharging cleaning water from the pump chamber, and a pump chamber. A pair of gears arranged in parallel and meshing with each other, and when the gears rotate in the pump chamber, washing water is sucked into the pump chamber from the suction port, and The cleaning water is configured to be discharged from the discharge port.

  Japanese Patent Laid-Open No. 2004-151561 describes that an enlarged diameter portion having a larger diameter toward the pump chamber side of the suction port and the discharge port is provided on the pump chamber side. If the suction port has a larger diameter toward the pump chamber side, the cleaning water flows so as to spread along the inner peripheral surface of the suction port when the cleaning water flows into the pump chamber from the suction port. The washing water is smoothly transferred to the discharge port side in the pump chamber. In addition, since the discharge port has a larger diameter toward the pump chamber side, the cleaning water transferred to the discharge port side through the pump chamber by each gear can smoothly flow into the discharge port. Thereby, the flow resistance of the washing water in the pump is reduced, and the washing water can be efficiently pumped to the washing nozzle.

Shokai 58-142387

  In the pump of Patent Document 1, when the casing is molded using a mold, the diameter-expanded portions of the suction port and the discharge port are undercut, so in order to form these diameter-expanded portions, It is necessary to install a core part separate from the mold part for forming the other part in the mold. For this reason, the mold cost for molding the casing increases, and the molding process of the casing becomes complicated.

  An object of this invention is to provide the pump which can aim at reduction of the metal mold | die cost for shape | molding a casing, and the simplification of the molding process of a casing, and the washing | cleaning apparatus provided with this pump.

The pump of the present invention (Claim 1) has a pump chamber therein, a casing having a suction port for sucking fluid into the pump chamber, and a discharge port for discharging fluid from the pump chamber; A pair of gears arranged in parallel in the pump chamber and meshing with each other, and the gear rotates in the pump chamber, whereby fluid is sucked into the pump chamber from the suction port, The pump chamber is configured such that fluid in the pump chamber is discharged from the discharge port, and at least a portion of the suction port and the discharge port on the pump chamber side from a middle portion in the axial center direction thereof. In each of the pumps having an enlarged diameter portion that increases in diameter toward the pump chamber side, the casing includes at least a first casing body that constitutes a part of a circumferential direction of the enlarged diameter portion, and the enlarged diameter portion. The other part in the circumferential direction of the diameter part And a second casing body formed, and the first casing member and the second casing member is bonded, forms a part of the circumferential direction of the enlarged diameter portion of the first casing member The portion protrudes toward the second casing body, and a packing is disposed on the entire periphery of the overlapping surface of the first casing body and the second casing body. The said enlarged diameter part is arrange | positioned at the side.

  A pump according to a second aspect is the pump according to the first aspect, wherein the inner peripheral surfaces of the enlarged diameter portions of the suction port and the discharge port are respectively in the cross section along the axis of the suction port and the discharge port. In addition, the discharge port has a shape that is convexly curved inward.

This onset Ming cleaning apparatus is installed in the toilet bowl, a wash apparatus for cleaning the buttocks of the toilet user, a cleaning nozzle for injecting wash water to the buttocks of the toilet user, to the cleaning nozzle In a cleaning apparatus including a pump for supplying cleaning water, the pump is the pump of the present invention .

  In the pump according to the present invention (Claim 1), at least a portion of the suction port and the discharge port on the side of the pump chamber from the middle portion in the axial center direction has a larger diameter toward the pump chamber. However, the casing has at least a first casing body constituting a part in the circumferential direction of each enlarged diameter part and a second part constituting the other circumferential part of each enlarged diameter part. The casing body is joined. Therefore, when these casing bodies are molded using a mold, each enlarged diameter portion does not have an undercut shape in the mold. Thereby, in order to form each enlarged diameter part, it is not necessary to install a mold part for forming a part other than the enlarged diameter part and a separate core in the mold. It is possible to reduce the mold cost for molding and facilitate the molding process of the casing.

  In addition, “the casing includes at least a first casing body that constitutes a part in the circumferential direction of the enlarged diameter portion, and a second casing that constitutes the other portion in the circumferential direction of the enlarged diameter portion. The description “joined to the body” indicates that the diameter-expanded portion is not only composed of two casing bodies, but may be composed of three or more casing bodies. Specifically, for example, when the enlarged diameter portion is configured by three casing bodies, the casing includes at least a first casing body that constitutes a part in the circumferential direction of the enlarged diameter portion, and a circumference of the enlarged diameter portion. A second casing body that constitutes another part of the direction and a third casing body that constitutes the remaining portion in the circumferential direction of the enlarged diameter portion, and by joining these casing bodies The portions of the expanded diameter portion that has been divided into three are combined to complete the expanded diameter portion. Of course, the enlarged diameter portion may be constituted by four or more casing bodies. The enlarged diameter portions may be divided at equal intervals in the circumferential direction, or may be divided at unequal intervals. The casing may include a casing body that does not constitute the enlarged diameter portion.

  In the pump of the present invention, since the suction port has a larger diameter toward the pump chamber side, the fluid spreads along the inner peripheral surface of the suction port when the fluid flows into the pump chamber from the suction port. Therefore, the washing water is smoothly transferred to the discharge port side through the pump chamber by the gears. Further, since the discharge port has a larger diameter toward the pump chamber side, the fluid transferred to the discharge port side through the pump chamber by each gear can smoothly flow into the discharge port. Thereby, the flow resistance of the fluid in the pump is reduced, and the fluid can be efficiently pumped.

  According to a second aspect of the present invention, in the cross section along the axial center line of the suction port and the discharge port, the inner peripheral surfaces of the enlarged diameter portions of the suction port and the discharge port are respectively protruded inward of the suction port and the discharge port. By adopting a curved shape, the flow resistance of the fluid in the pump can be reduced more effectively.

  Since the cleaning apparatus of the present invention (Claim 3) includes the pump of the present invention, it is possible to provide a cleaning apparatus that can efficiently supply cleaning water to the cleaning nozzle at low cost. Become.

It is a longitudinal cross-sectional view of the pump which concerns on embodiment. It is sectional drawing which follows the II-II line of FIG. It is sectional drawing which follows the III-III line of FIG. It is a disassembled sectional view of the pump of FIG. It is a disassembled sectional view of the pump of FIG. It is a perspective view of the 1st casing body of the pump of FIG. It is a perspective view of the 2nd casing body of the pump of FIG.

  Hereinafter, embodiments will be described with reference to the drawings. In the following description, for the sake of convenience, the vertical direction and the horizontal direction refer to the vertical direction and the horizontal direction in FIG. 1, respectively, and the front refers to the front side (front side) of FIG. Means the back side (back side) of FIG. Of course, the direction of the pump when the pump is actually used is not limited to the vertical direction, the horizontal direction, and the front-back direction in FIG.

  FIG. 1 is a longitudinal sectional view of the pump according to the embodiment (a sectional view taken along line II in FIG. 2), and FIGS. 2 and 3 are II-II and III- lines in FIG. 1, respectively. It is sectional drawing which follows an III line. 4 and 5 are exploded cross-sectional views of the pump, showing the same cross-section as in FIGS. 2 and 3, respectively. FIG. 6 is a perspective view of the first casing body constituting the casing of the pump as viewed from the rear, and FIG. 7 is a perspective view of the second casing body constituting the casing of the pump from the front. is there. In FIGS. 2 to 5, the gear and the rotation shaft of the gear are omitted from the components of the pump.

  In this embodiment, the pump 1 is installed in a toilet bowl (not shown), and a cleaning nozzle (not shown) of a cleaning device for cleaning the buttocks of a toilet user uses a washing water tank (not shown) from a washing water tank (not shown). This is for supplying cleaning water (corresponding to the fluid in claim 1). In addition, the use of the pump 1 is not limited to this.

  The pump 1 has a pump chamber 2 inside, and has a suction port 3 for sucking cleaning water into the pump chamber 2 and a discharge port 4 for discharging cleaning water from the pump chamber 2. A casing 20 and a pair of gears 5, 6 and the like arranged in parallel in the pump chamber 2 and meshing with each other are provided. In this embodiment, as shown in FIG. 1, the suction port 3 is provided near the center in the left-right direction on the upper surface of the casing 20, and the discharge port 4 is provided near the center in the left-right direction on the lower surface of the casing 20. In this embodiment, each of the suction port 3 and the discharge port 4 has a substantially cylindrical shape, the suction port 3 projects upward from the upper surface of the casing 20, and the discharge port 4 projects downward from the lower surface of the casing 20. Yes. The suction port 3 and the discharge port 4 are arranged coaxially with each other. In addition, the shape and arrangement | positioning of the suction inlet 3 and the discharge outlet 4 are not limited to this. A washing water tank is connected to the suction port 3 via a pipe (not shown) or the like, and a washing nozzle is connected to the discharge port 4 via a pipe (not shown) or the like.

  The gears 5 and 6 are rotatably supported by the rotation shafts 7 and 8 in the pump chamber 2, respectively. The rotary shafts 7 and 8 are disposed such that the axial direction is the front-rear direction and the left-right direction is spaced from each other. The distance between the shaft centers of the left and right rotating shafts 7 and 8 is substantially the sum of the reference circle radii of the gears 5 and 6. The front end side and the rear end side of each of the rotary shafts 7 and 8 are respectively connected to the rotary shaft holding holes 9a and 9b and 10a and 10b (FIG. 2) provided in the front and rear wall surfaces in the pump chamber 2, respectively. It is held rotatably. As shown in FIG. 1, the gears 5 and 6 are supported by the rotary shafts 7 and 8 in the pump chamber 2 and arranged in parallel in the left-right direction. Meshed.

  As shown in FIG. 1, the inner peripheral surface of the peripheral wall (the peripheral wall constituting portion 22 b of the second casing body 22, which will be described later) that surrounds the upper, lower, left, and right sides of the pump chamber 2. And the inner peripheral surface of the part surrounding the substantially right half circumference of the right gear 5 is a substantially semi-cylindrical curved surface substantially along the tooth tip circle of each gear 5, 6.

  In this embodiment, as shown in FIG. 2, one rotary shaft holding hole 9b on the front wall of the pump chamber 2 penetrates the casing 20 (a front side wall constituting portion 21a of the first casing body 21 described later). It is a through hole, and the front end side of one rotating shaft 8 held in the rotating shaft holding hole 9b extends to the outside of the casing 20 through the rotating shaft holding hole 9b. Driving means (not shown) such as a motor is connected to the front end side of the rotating shaft 8.

When the pump 1 is operated, the gear 6 is rotationally driven in the direction of the arrow R1 in FIG. ₁ (clockwise in FIG. 1) by the driving force from the driving means via the rotary shaft 8, and is driven by this. gear 5 Te is rotated in the arrow R ₂ direction of Figure 1 (counterclockwise direction in FIG. 1). As the gears 5 and 6 rotate, the cleaning water in the space 2a (FIG. 1) in the pump chamber 2 on the suction port 3 side with respect to the meshing part between the gears 5 and 6 is transferred to the gears 5 and 6 respectively. The teeth are scraped left and right from inside the space 2a and along the inner peripheral surface of the peripheral wall of the pump chamber 2 to the space 2b (FIG. 1) closer to the discharge port 4 than the meshing portion between the gears 5 and 6. Be transported. By repeating this, the cleaning water is sequentially sucked into the pump chamber 2 (space 2a) from the suction port 3, and the cleaning water is discharged from the discharge port 4 to the outside of the pump chamber 2 (space 2b).

  In this embodiment, as shown in FIGS. 1 and 3, the portion of the suction port 3 and the discharge port 4 on the side of the pump chamber 2 from the middle portion in the axial direction is larger toward the pump chamber 2 side. The diameter-expanded portions 3a and 4a become diameters. Of the suction port 3 and the discharge port 4, the inner diameters of the portions on the pump outer side (the side opposite to the pump chamber 2) from the enlarged diameter portions 3 a and 4 a are substantially constant. In addition, each of the suction port 3 and the discharge port 4 may have a shape having a larger diameter toward the pump chamber 2 as a whole.

Since the suction port 3 has a larger diameter toward the pump chamber 2 in this way, when the cleaning water flows from the suction port 3 into the space 2 a in the pump chamber 2, the cleaning water flows into the inner periphery of the suction port 3. Since the water flows so as to spread left and right along the surface, the washing water is smoothly scraped out of the space 2a and transferred to the space 2b by the left and right gears 5 and 6 rotating in the R ₁ and R ₂ directions. Further, since the discharge port 4 has a larger diameter toward the pump chamber 2, the cleaning water transferred to the space 2 b by the gears 5 and 6 can smoothly flow into the discharge port 4. Thereby, the flow resistance of the washing water in the pump 1 is reduced, and the washing water can be efficiently supplied from the washing water tank to the washing nozzle.

  In this embodiment, as shown in FIG. 3, in the cross section along the axial center line of the suction port 3 and the discharge port 4, the inner peripheral surfaces of the enlarged diameter portions 3a and 4a are respectively the suction port 3 and the discharge port. 4 is curved inwardly. By setting the inner peripheral surfaces of the enlarged diameter portions 3a and 4a to such a shape, the flow resistance of the cleaning water in the pump 1 can be more effectively reduced. In addition, the shape of the inner peripheral surface of the diameter expansion parts 3a and 4a is not limited to this, For example, it may be the shape expanded at a fixed angle toward the pump chamber 2, and the diameter gradually increases. It may be a stepped shape that increases.

  In this embodiment, the casing 20 is formed by joining a first casing body 21 constituting the front half side thereof and a second casing body 22 constituting the rear half side thereof.

  In this embodiment, the first casing body 21 includes a front side wall constituting portion 21a constituting a front wall of the pump chamber 2 and a front half side in the circumferential direction of the enlarged diameter portion 3a of the suction port 3 (hereinafter simply referred to as the first half). A first half side component 21b for the suction port enlarged diameter portion, and a first half side component portion for the discharge port enlarged diameter portion constituting the first half side in the circumferential direction of the enlarged diameter portion 4a of the discharge port 4. 21c. A boss portion 21d through which a bolt 23 for connecting the first casing body 21 and the second casing body 22 is inserted is provided on the outer peripheral side of the front side wall constituting portion 21a. Moreover, when the 1st casing body 21 and the 2nd casing body 22 are joined to the outer peripheral side of the front side wall structure part 21a, the positioning protrusion 22h of the below-mentioned 2nd casing body 22 engages. A recess 21e is provided.

  In this embodiment, as shown in FIGS. 4 and 5, the suction port enlarged-diameter first half side component 21 b is located on the upper half of the pump chamber 2 on the first half side of the enlarged-diameter portion 3 a of the suction port 3. A portion from the peripheral edge to the front edge of the upper wall surface is formed. The discharge port enlarged-diameter first half side configuration portion 21c is a front edge of the lower wall surface from the peripheral portion on the first half side of the enlarged-diameter portion 4a of the discharge port 4 in the lower wall surface in the pump chamber 2. It constitutes the part up to. The front end sides of the suction port enlarged-diameter first half side component 21b and the discharge port enlarged-diameter first half side component 21c are connected to the rear surface of the front side wall component 21a, respectively.

  The first half side of the suction port 3 and the discharge port 4 is formed so that a part of the rear end surface of the suction port enlarged diameter portion first half side configuration portion 21b and the discharge outlet enlarged diameter portion first half side configuration portion 21c is cut out into a semicircular shape. In order to surround these, on the lower surface of the inlet-port enlarged-diameter first half side component 21b and on the upper surface of the discharge-port enlarged-diameter first half component 21c, the first half side of the enlarged-diameter portions 3a, 4a, respectively. A half circle is formed. Both ends in the circumferential direction on the front half side of the enlarged diameter portions 3a, 4a respectively face the rear end surfaces of the suction port enlarged portion front half side constituting portion 21b and the discharge port enlarged diameter portion first half constituting portion 21c.

  As shown in FIGS. 2 to 5, in this embodiment, the thickness in the vertical direction of the suction port enlarged-diameter first half side component 21b and the discharge port enlarged-diameter first half side component 21c is the diameter of each of the enlarged diameters. Although it is substantially equal to the length of the parts 3a and 4a in the vertical direction (= the axial center direction of the suction port 3 and the discharge port 4), it is not limited to this. For example, the thickness in the vertical direction of the suction port enlarged-diameter first half side component 21b and the discharge port enlarged-diameter first half side component 21c is made larger than the vertical length of each of the enlarged-diameter portions 3a, 4a. Of the port 3 and the discharge port 4, the portion on the outer side of the pump with respect to the diameter-enlarged portions 3 a and 4 a is also at least partially, the suction-portion enlarged-diameter first half side component 21 b and the discharge-port enlarged-diameter first half. You may make it comprise by the side structure part 21c.

  The second casing body 22 includes a rear side wall constituting part 22 a constituting the rear wall of the pump chamber 2 and a peripheral wall constituting part 22 b constituting a peripheral wall surrounding the top, bottom, left and right of the pump chamber 2. The base ends of the substantially cylindrical suction port 3 and the discharge port 4 are connected to the upper surface and the lower surface of the outer peripheral side of the peripheral wall component 22b, respectively. The suction port 3 and the discharge port 4 are connected to the peripheral wall component 22b. It penetrates and communicates with the pump chamber 2.

  When the first casing body 21 and the second casing body 22 are joined, the front end surface of the peripheral wall constituting portion 22b overlaps with the peripheral edge portion of the rear surface of the front side wall constituting portion 21a over the entire circumference. A packing accommodating groove 22c is provided around the entire front end surface of the peripheral wall constituting portion 22b, and a joint surface between the peripheral wall constituting portion 22b and the front side wall constituting portion 21a is sealed along the packing accommodating groove 22c. A packing 22d is disposed. On the outer peripheral side of the peripheral wall constituting portion 22b, a boss portion 22e through which the bolt 23 is inserted is provided so as to overlap the boss portion 21d of the front side wall constituting portion 21a. A positioning projection 22h that engages with the recess 21e of the first casing body 21 is provided on the outer peripheral side of the peripheral wall constituting portion 22b.

  The upper surface and the lower surface on the inner peripheral side of the peripheral wall constituting portion 22b have recesses 22f and 22g with which the suction port enlarged portion first half side constituting portion 21b and the discharge port enlarged diameter portion first half constituting portion 21c are engaged, respectively. Is provided. The depths of the recesses 22f and 22g in the vertical direction are substantially equal to the thicknesses in the vertical direction of the suction port enlarged-diameter first half side component 21b and the discharge port enlarged-diameter first half side component 21c, respectively. .

  The front end sides of the recesses 22f and 22g respectively face the front end face of the peripheral wall constituting portion 22b. As shown in FIGS. 4 and 5, the rear ends of the recesses 22f and 22g are respectively located at substantially equal distances from the axial center lines of the suction port 3 and the discharge port 4 from the front end surface of the peripheral wall constituting portion 22b. Thereby, as for the suction port 3 and the discharge port 4, the front half side of the circumferential direction is exposed to the bottom face of the recesses 22f and 22g, respectively, and the second half side in the circumferential direction (hereinafter, simply referred to as the second half side) is concave. Of the upper and lower surfaces on the inner peripheral side of the peripheral wall constituting portion 22b, the rear edge side of the upper and lower surfaces of the upper and lower surfaces of the peripheral wall constituting portion 22b is cut out in a semicircular shape so that the step surfaces on the rear end sides of the locations 22f and 22g are cut out. The part is exposed.

  Exposed on the bottom surfaces of the recesses 22f and 22g are portions of the suction port 3 and the discharge port 4 that are on the outer side of the pump with respect to the enlarged diameter portions 3a and 4a. That is, the front half side of the enlarged diameter portions 3a and 4a does not exist on the inner peripheral surface of the peripheral wall constituting portion 22b.

  Of the upper surface and the lower surface on the inner peripheral side of the peripheral wall constituting portion 22b, the rear edge side portions of the upper surface and the lower surface with respect to the recesses 22f and 22g are respectively surrounded by the latter half side of the suction port 3 and the discharge port 4 respectively. The substantially half circumference of the latter half side of the enlarged diameter parts 3a and 4a is formed. Both ends in the circumferential direction on the rear half side of the enlarged diameter portions 3a and 4a respectively face the step surfaces on the rear end side of the recesses 22f and 22g.

  The first casing body 21 and the second casing body 22 are each formed by supplying a molding material such as molten synthetic resin or metal into a molding die (not shown).

  When the pump 1 is assembled, the gears 5 and 6 and the rotary shafts 7 and 8 are arranged inside the peripheral wall constituting portion 22b of the second casing body 22, and the front side wall constituting portion 21a of the first casing body 21 is disposed on the front side thereof. Put on. At this time, the suction port enlarged-diameter first half side component 21b and the discharge port enlarged-diameter first half side component 21c are respectively inserted into the peripheral wall component 22b and engaged with the recesses 22f and 22g. Thereby, as shown in FIGS. 2 and 3, the first-half side portions of the enlarged-diameter portions 3a and 4a formed in the inlet-port enlarged-diameter first-half configuration portion 21b and the discharge-port enlarged-diameter first-half configuration portion 21c, The rear-side portions of the enlarged diameter portions 3a and 4a formed on the upper surface and the lower surface of the inner peripheral side of the peripheral wall constituting portion 22b are combined, and the enlarged diameter portions 3a and 4a respectively connect the suction port 3 and the discharge port 4 respectively. It goes around.

  In the pump 1, of the suction port 3 and the discharge port 4, the portions on the pump chamber 2 side from the middle portion in the axial center direction thereof are enlarged in diameter so that the pump chamber 2 side becomes larger in diameter. The casing 20 includes a first casing body 21 that constitutes the first half of the enlarged diameter portions 3a and 4a and a second casing that constitutes the latter half of the enlarged diameter portions 3a and 4a. The body 22 is joined. Therefore, when each casing body 21, 22 is molded using a mold, the enlarged diameter portions 3 a, 4 a do not have an undercut shape in the mold. Thereby, in order to form the enlarged diameter portions 3a and 4a, it is unnecessary to install a mold portion and a separate core in the die for forming portions other than the enlarged diameter portions 3a and 4a. Therefore, it is possible to reduce the mold cost for molding the casing 20 and facilitate the molding process of the casing 20.

  The above embodiment is an example of the present invention, and the present invention may have a configuration other than that illustrated.

  For example, in the above embodiment, the casing 20 is formed by joining the first casing body 21 constituting the front half side thereof and the second casing body 22 constituting the rear half side thereof. The configuration of the casing 20 is not limited to this. For example, the casing 20 may be formed by joining a first casing body constituting the left half side thereof and a second casing body constituting the right half side thereof. In that case, each of the enlarged diameter portions 3a and 4a of the suction port 3 and the discharge port 4 is provided in the first casing body on the left half side in the circumferential direction, and is provided in the second casing body on the right half side.

  The casing 20 may be formed by joining three or more casing bodies. In that case, the diameter-expanded portions 3a and 4a may be divided into three or more pieces, and each of the divided portions may be constituted by separate casing bodies joined to each other. Note that the combination of casing bodies constituting the enlarged diameter portion 3a of the suction port 3 and the combination of casing bodies constituting the enlarged diameter portion 4a of the discharge port 4 may be different.

DESCRIPTION OF SYMBOLS 1 Pump 2 Pump chamber 3 Suction port 3a Expanded diameter part 4 Discharge port 4a Expanded diameter part 5, 6 Gear 7, 8 Rotating shaft 20 Casing 21 First casing body 21a Front side wall component 21b Suction port expanded diameter part first half side Component 21c Discharge port enlarged-diameter first half-side component 22 Second casing body 22a Rear wall component 22b Perimeter wall component

Claims (4)

A casing having a pump chamber inside, a suction port for sucking fluid into the pump chamber, and a discharge port for discharging fluid from the pump chamber;
A pair of gears arranged in parallel in the pump chamber and meshing with each other;
A pump configured such that when the gear rotates in the pump chamber, fluid is sucked into the pump chamber from the suction port, and fluid in the pump chamber is discharged from the discharge port;
Among the suction port and the discharge port, at least a portion on the pump chamber side from a middle portion in the axial center direction thereof, respectively, in a pump having an enlarged diameter portion that becomes larger in diameter toward the pump chamber side,
The casing includes at least a first casing body that constitutes a part in the circumferential direction of the enlarged diameter portion, and a second casing body that constitutes the other portion in the circumferential direction of the enlarged diameter portion , 1 of the casing body and the second casing member is joined,
A portion constituting a part in the circumferential direction of the enlarged diameter portion of the first casing body protrudes to the second casing body side,
Packing is disposed over the entire periphery at the periphery of the overlapping surface of the first casing body and the second casing body,
A pump characterized in that the enlarged-diameter portion is disposed on the inner peripheral side of the packing. In claim 1,
In the cross section along the axial center line of the suction port and the discharge port, the inner peripheral surfaces of the enlarged diameter portions of the suction port and the discharge port are respectively curved so as to protrude inward of the suction port and the discharge port. The pump characterized by becoming. In claim 1 or 2,
The first casing body (21) includes a front side wall constituting part (21a) constituting a front wall of the pump chamber (2) and a circumferential direction of the enlarged diameter part (3a) of the suction port (3). The suction port enlarged-diameter first half side configuration part (21b) and the discharge port enlarged-diameter first half side configuration constituting a part in the circumferential direction of the enlarged-diameter part (4a) of the discharge port (4) Part (21c),
The suction port enlarged-diameter first half side component (21b) and the discharge outlet enlarged-diameter first half component (21c) are erected from the front side wall component (21a) to the pump chamber (2) side. ,
The second casing body (22) includes a rear side wall constituting part (22a) constituting a rear wall of the pump chamber (2) and a peripheral wall constituting part (22b) constituting a peripheral wall surrounding the pump chamber (2). And
The suction port (3) and the discharge port (4) pass through the peripheral wall constituting part (22b),
Peripheral wall component front face and the first casing member (21) of the front wall components first casing member in the state and has Tsu heavy Do periphery of (21a) of (22b) (21) and the second Of the casing body (22),
The suction port enlarged-diameter first half side component (21b) is engaged with a recess (22f) provided on the inner peripheral side of the peripheral wall component (22b),
The discharge port enlarged-diameter first half side component (21c) is engaged with a recess (22g) provided on the inner peripheral side of the peripheral wall component (22b). A cleaning device installed in a toilet bowl for cleaning the buttocks of a toilet user,
A cleaning nozzle for injecting cleaning water into the buttocks of the toilet user;
In a cleaning apparatus comprising a pump for supplying cleaning water to the cleaning nozzle,
The cleaning apparatus according to any one of claims 1 to 3, wherein the pump is the pump according to any one of claims 1 to 3.

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