Washing method, washing brush, and washing device

Abstract

To provide a washing method capable of suppressing liquid leakage from a connection part of an operation rod and an implantation part.SOLUTION: This washing method is for washing an object by using a washing brush 11 which includes a hair bundle 15 brought into contact with the object, an implantation part 16 in which the hair bundle 15 is implanted, a liquid injection hole 18 which is provided in the implantation part 16 and through which a liquid passes, and an operation rod 20 connected to the implantation part 16 and gripped by an operator. The washing brush 11 includes a boss 19 provided in the implantation part 16, a connection part 29 which connects the operation rod 20 to the boss 19 so as to be operable, a liquid supply pipe 22 fixed to the implantation part 16 and connected to the liquid injection hole 18, and a water supply pipe 38 which is provided in the liquid supply pipe 22 and through which the liquid supplied to the liquid supply pipe 22 flows or a pipe joint 37 to / from which a washing liquid supply pipe 47 is attached / detached.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a cleaning method, a cleaning brush, and a cleaning device for cleaning an object by spraying a liquid onto the object. [Background technology]

[0002] An example of a cleaning brush capable of spraying liquid onto an object is described in Non-Patent Document 1. The cleaning brush described in Non-Patent Document 1 has a bristle section with multiple bristle bundles, a water injection hole provided in the bristle section, a boss section fixed to the bristle section, and an operating rod attached to the boss section via a connection section. The operating rod is operable around the connection section relative to the bristle section. A passage is provided inside the operating rod and in the boss section, and when water is supplied from the rear end of the operating rod, the water passes through the passage and is injected from the water injection hole. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] amazon(registered trademark).co.jp / Takagi (takagi) Extendable Patitto Car Wash Brush G271 [Searched on September 19, 2023], Internet, <https: / / www.amazon.co.jp / %E3%82%BF%E3%82%AB%E3%82%AE-takagi-G271-%E4%BC%B8%E7%B8%AE%E5%9E%8B%E3%83%91%E3%83%81%E3%83%83%E3%83%88%E6%B4%97%E8%BB%8A%E3%83%96%E3%83%A9%E3%82%B7-G271%E3%80%902%E5%B9%B4%E9%96%93%E3%81%AE%E5%AE%89%E5%BF%83%E4%BF%9D%E8%A8%BC%E3%80%91 / dp / B000EVPHFI / ref=psdc_2045111051_t1_B09WKFMMTF?th=1> Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors of the present application recognized a problem in that, because the cleaning brush described in Non-Patent Document 1 has a passageway that extends from the operating rod to the connection part, when using the cleaning brush described in Non-Patent Document 1 to clean an object, there is a possibility that liquid flowing through the passageway will leak when the operating rod is operated.

[0005] An object of the present disclosure is to provide a cleaning method, a cleaning brush, and a cleaning device that can prevent liquid leakage from the connection between the operating rod and the bristles. [Means for solving the problem]

[0006] The present disclosure relates to a cleaning method for cleaning an object using a cleaning brush having a bristle bundle that is brought into contact with the object, a bristle implantation section to which the bristle bundle is attached, a liquid injection hole provided on the bristle implantation section and through which liquid to be injected onto the object passes, and an operating rod connected to the bristle implantation section and held by an operator's hand, wherein the cleaning brush has a boss section provided on the bristle implantation section, a connection section that operably connects the operating rod to the boss section, a liquid supply pipe fixed to the bristle implantation section and connected to the liquid injection hole, and a connection tube provided on the liquid supply pipe and through which an auxiliary supply pipe through which liquid supplied to the liquid supply pipe flows is attached and detached. Effect of the Invention

[0007] The cleaning method of the present embodiment can prevent liquid from leaking from the connection between the operating rod and the bristles. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic diagram showing an entire cleaning device used in a cleaning method. [Diagram 2] FIG. 2A is a front view of the cleaning brush, and FIG. 2B is a diagram showing the surface of the bristles of the cleaning brush. [Diagram 3] FIG. 11 is a side view showing an example of use of the cleaning brush. [Figure 4]FIG. [Diagram 5] FIG. 2 is a process diagram showing an example of a cleaning method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (overview) Some embodiments included in the cleaning method, cleaning brush, and cleaning device are described based on the drawings. In the drawings for explaining the embodiments of the cleaning device, the same parts are generally given the same reference numerals, and the repeated description is omitted. FIG. 1 shows a cleaning device 10 used in a process of a cleaning method for cleaning an object. The cleaning device 10 has a cleaning brush 11, a cleaning liquid tank 12, a pump 13, and a water supply source 14. The cleaning brush 11 has a bristle part 16, liquid supply pipes 21 and 22 provided on the bristle part 16, a boss part 19 provided on the bristle part 16, and an operating rod 20 connected to the boss part 19. The bristle part 16 may be defined as a base or a head. The material of the bristle part 16 is, for example, a synthetic resin or a metal, and the bristle part 16 has a plate shape. The planar shape of the bristle part 16 is a quadrangle, for example, a rectangle. The bristle portion 16 has two long edges 23, 24 and two short edges 25, 26. The long edges 23, 24 are parallel to each other, and the short edges 25, 26 are parallel to each other.

[0010] The bristle implantation portion 16 has a front surface 27 and a back surface 28, and the front surface 27 and the back surface 28 are provided at opposite positions in the thickness direction of the bristle implantation portion 16. The front surface 27 and the back surface 28 are parallel to each other. Liquid injection holes 17, 18 are provided penetrating the bristle implantation portion 16 in the thickness direction. A plurality of liquid injection holes 17, 18, for example, two liquid injection holes, are provided at intervals in the direction along the long edges 23, 24. The two liquid injection holes 17, 18 are arranged at a central position separated in the direction along the long edges 23, 24. A plurality of bristle bundles 15 are provided on the front surface 27.

[0011] The bristle bundle 15 is a bundle of synthetic resin, e.g., nylon bristles, fixed to the surface 27. The bristle bundles 15 protrude from the surface 27 by a predetermined amount, e.g., 35 mm. On the surface 27, the arrangement density of the bristle bundles 15 in a single first region A1 in which the liquid injection hole 17 or liquid injection hole 18 is provided is lower than the arrangement density of the bristle bundles 15 in a second region A2 in which the liquid injection holes 17, 18 are not provided. In a plan view of the surface 27, the area of ​​the first region A1 is the same as the area of ​​the second region A2. Note that the first region A1 and the second region A2 shown in FIG. 2(B) are both circular.

[0012] The two liquid supply pipes 21, 22 are fixed to the back surface 28 of the bristle unit 16 as shown in FIG. 2(A). The two liquid supply pipes 21, 22 are made of, for example, synthetic resin or metal. The liquid supply pipe 21 is connected to the liquid jet hole 17, and the liquid supply pipe 22 is connected to the liquid jet hole 18. The liquid supply pipes 21, 22 are connected to a pipe joint 37. When the bristle unit 16 is viewed from the front as shown in FIG. 2(A), the liquid supply pipes 21, 22 are provided with the pipe joint 37 in between. The pipe joint 37 has a passage branched to be connected to the liquid supply pipes 21, 22. The pipe joint 37 is made of, for example, synthetic resin or metal.

[0013] The liquid supply pipe 21 has a first component part 21A and a second component part 21B. The first component part 21A is arranged parallel to the rear surface 28, and the second component part 21B is arranged perpendicular to the rear surface 28. The first component part 21A is connected to the pipe joint 37, and the second component part 21B is connected to the first component part 21A and fixed to the rear surface 28. As shown in FIG. 2(A), when the bristle-implanted part 16 is viewed from the front, the second component part 21B and the second component part 22B are fixed to the rear surface 28 at an interval in the direction along the long edges 23 and 24. As shown in FIG. 2(A), when the bristle-implanted part 16 is viewed from the front, the boss part 19 is arranged between the second component part 21B and the second component part 22B in the direction along the long edges 23 and 24. The first component portion 21A and the first component portion 22A protrude in opposite directions from the pipe joint 37 along the long edges 23, 24.

[0014] The liquid supply pipe 22 has a first component part 22A and a second component part 22B. The first component part 22A is arranged parallel to the rear surface 28, and the second component part 22B is arranged perpendicular to the rear surface 28. The first component part 22A is connected to a pipe joint 37, and the second component part 22B is connected to the first component part 22A and fixed to the rear surface 28. The first component part 21A and the first component part 22A are arranged coaxially.

[0015] The boss portion 19 is fixed to the rear surface 28 by a fixing element, for example, a screw member. When the bristle unit 16 is viewed in plan as in FIG. 4, the boss portion 19 is disposed approximately in the center in the direction along the long edges 23, 24. The material of the boss portion 19 is, for example, a synthetic resin or a metal. The operating rod 20 is attached to the boss portion 19 via a connection portion 29. A center line B2 passing through the center of the operating rod 20 is shown, and the boss portion 19 and a pipe joint 37 are provided on an extension of the center line B2. The connection portion 29 has a support shaft 30 and a knob 31, and the operating rod 20 is connected to the connection portion 29.

[0016] As shown in FIG. 3, the connection portion 29 has a support shaft 30. The operating rod 20 can be operated within a range of a predetermined angle θ1 around the support shaft 30 in a plane perpendicular to the support shaft 30. The predetermined angle θ1 is an angle formed by a center line B1 passing through the center of the boss portion 19 and a center line B2 passing through the center of the operating rod 20. The support shaft 30 is disposed parallel to the back surface 28, and extends along the longitudinal direction of the long edges 23, 24. An operator can operate the knob 31 to switch between a state in which the operating rod 20 can be operated around the support shaft 30 and a state in which the operating rod 20 is fixed.

[0017] The operating rod 20 is an element that an operator holds by hand. As shown in FIG. 4, the operating rod 20 has a first shaft 32, a second shaft 33, and a third shaft 34. The first shaft 32, the second shaft 33, and the third shaft 34 are made of, for example, metal or synthetic resin. The first shaft 32, the second shaft 33, and the third shaft 34 are all hollow pipe structures. A first end of the first shaft 32 is connected to the connecting portion 29, and a second end of the first shaft 32 is connected to a first end of the second shaft 33 via a connecting element 35. A second end of the second shaft 33 is connected to the third shaft 34 via a connecting element 36. The first shaft 32, the second shaft 33, and the third shaft 34 are provided with the center line B2 as the center. By operating the connecting elements 35 and 36, an operator can extend and retract the operating rod 20 in a direction along the center line B2 and fix the length of the operating rod 20.

[0018] The water supply source 14 is, for example, a water faucet or a water tank. Water supply pipes 38, 39 and a hub 40 are provided to supply water from the water supply source 14 to the cleaning brush 11. The water supply pipe 39 is connected to the water supply source 14 and the hub 40. The hub 40 has multiple connection ports. The water supply pipe 38 is connected to either the pipe joint 37 or the connection port 41. The water supply pipes 38, 39 are made of, for example, synthetic resin. The hub has levers that open and close each of the multiple connection ports 41. The water supply pipe 38 and the pipe joint 37 can be connected and disconnected by a known connection mechanism. In addition, the water supply pipe 39 and the pipe joint 37 can be connected and disconnected by a known connection mechanism. The connection mechanism includes a coupler, a socket, etc.

[0019] The cleaning liquid tank 12 stores a cleaning liquid therein. The cleaning liquid includes a chemical liquid. The cleaning liquid may be water-based, semi-water-based, hydrocarbon-based, alcohol-based, or the like, depending on the conditions. The conditions include the material of the object C1 to be cleaned, the degree of dirt on the object C1, the surrounding environment of the object C1, and the like. A supply port 45 is provided at the bottom of the cleaning liquid tank 12. The pump 13 is driven by an electric motor, and has a suction port 43 and a discharge port 42. The suction port 43 is connected to the supply port 45 via a cleaning liquid supply pipe 44. The discharge port 42 is connected to a cleaning liquid supply pipe 47. The cleaning liquid supply pipes 44 and 47 are made of, for example, synthetic resin. The cleaning liquid supply pipe 47 can be connected to and detached from the pipe joint 37. The cleaning liquid tank 12 and the pump 13 may be integrated to form a unit 46.

[0020] The liquid supply pipes 21, 22, the water supply pipe 38, the cleaning liquid supply pipe 47, and the pipe joint 37 are provided independently from the boss portion 19 and the operating rod 20. The liquid supply pipes 21, 22, the water supply pipe 38, the cleaning liquid supply pipe 47, and the pipe joint 37 are physically separate members from the boss portion 19 and the operating rod 20. The liquid supply pipes 21, 22, the water supply pipe 38, the cleaning liquid supply pipe 47, and the pipe joint 37 are provided outside the boss portion 19 and the operating rod 20.

[0021] (Cleaning process) An example of a process for cleaning the object C1 by the cleaning device 10 is as follows. In the cleaning method for cleaning the object C1, a first process S1 and a second process S2 shown in FIG. 5 are performed. The second process S2 is performed following the first process S1. In the first process S1, the cleaning liquid in the cleaning liquid tank 12 is sprayed onto the surface of the object C1. Before performing the first process S1, an operator connects the cleaning liquid supply pipe 47 to the pipe joint 37. In addition, the water supply pipe 38 is removed from the pipe joint 37. When the pump 13 is driven, the pump 13 sucks the cleaning liquid in the cleaning liquid tank 12 from the suction port 43. In addition, the pump 13 discharges the cleaning liquid from the discharge port 42 to the cleaning liquid supply pipe 47. The cleaning liquid flowing through the cleaning liquid supply pipe 47 is sprayed from the liquid injection holes 17, 18.

[0022] The operator holds the operating rod 20 by hand, and as shown in FIG. 3, brings the tip of the bristle bundle 15 into contact with the surface of the object C1, and moves the cleaning brush 11 along the object C1, for example, reciprocating. Then, the cleaning liquid ejected from the liquid ejection holes 17 and 18 is sprayed onto the surface of the object C1, and the bristle bundle 15 rubs the surface of the object C1, so that the cleaning liquid is evenly applied to the surface of the object C1. When the operator completes the work of applying the cleaning liquid to the object C1, he stops the pump 13. After the operator completes the work of applying the cleaning liquid to the object C1, the operator performs the second step S2 after a predetermined time, for example, about 10 minutes, has elapsed. After the work of applying the cleaning liquid to the object C1 has been completed, dirt on the surface of the object C1 floats up during the predetermined time that has elapsed.

[0023] Before performing the second step S2, the operator removes the cleaning liquid supply pipe 47 from the pipe joint 37 and connects the water supply pipe 38 to the pipe joint 37. Furthermore, the pump 13 discharges the cleaning liquid from the discharge port 42 to the cleaning liquid supply pipe 47. In the second step S2, water from the water supply source 14 is supplied to the liquid supply pipes 21 and 22 through the water supply pipe 39, the hub 40, and the water supply pipe 38. Furthermore, the water is sprayed from the liquid spray holes 17 and 18.

[0024] The operator holds the operating rod 20 by hand, brings the tip of the bristle bundle 15 into contact with the surface of the object C1 as shown in Fig. 3, and moves the cleaning brush 11 along the object C1, for example, reciprocating. Then, water is sprayed from the liquid injection holes 17, 18 onto the surface of the object C1, and the bristle bundle 15 rubs the surface of the object C1, thereby scraping off dirt on the surface of the object C1, for example, deposits and foreign matter. In this way, the operator uses the cleaning brush 11 to perform the first step S1 and the second step S2, thereby cleaning the surface of the object C1.

[0025] If the object C1 is, for example, an outer wall of a building and the surface of the object C1 extends in a substantially vertical direction, the cleaning brush 11 is moved stepwise vertically from top to bottom. When the first step S1 and the second step S2 are performed on the object C1 in a sunny condition, the first step S1 is completed during a time when the sun is not shining, and the second step S2 is performed before the cleaning liquid evaporates, thereby ensuring the dirt removal function.

[0026] (Effects of the embodiment) The liquid supply pipes 21, 22, the water supply pipe 38, the cleaning liquid supply pipe 47, and the pipe joint 37 are provided independently from the boss portion 19 and the operating rod 20. The liquid supply pipes 21, 22, the water supply pipe 38, the cleaning liquid supply pipe 47, and the pipe joint 37 are physically separate members from the boss portion 19 and the operating rod 20. The liquid supply pipes 21, 22, the water supply pipe 38, the cleaning liquid supply pipe 47, and the pipe joint 37 are provided outside the boss portion 19 and the operating rod 20.

[0027] Therefore, when the operating rod 20 is operated with the support shaft 30 as a fulcrum, it is possible to prevent the cleaning liquid or water from leaking from the boss portion 19 or the connection portion 29. Furthermore, even if the predetermined angle θ1 becomes relatively small, the angle θ2 shown in FIG. 3 does not become relatively narrow. The angle θ2 is an angle formed between the center line B3 and the center line B4 in a plane perpendicular to the support shaft 30. The center line B3 means the center of the liquid supply pipes 21 and 22. The center line B4 means the center of the water supply pipe 38 or the cleaning liquid supply pipe 47. Therefore, it is possible to prevent the effective cross-sectional area of ​​the supply path of the cleaning liquid from becoming relatively narrow, or the effective cross-sectional area of ​​the supply path of the water from becoming relatively narrow. Therefore, it is possible to prevent the flow resistance of the cleaning liquid from increasing, or the flow resistance of the water from increasing.

[0028] Furthermore, when the water supply source 14 is a water line, the water pressure supplied to the cleaning brush 11 is about 4.0 MPa. In contrast, the water pressure of a comparative high-pressure cleaner is about 6.0 MPa to 12.0 MPa. Therefore, when the cleaning brush 11 of this embodiment is used, deformation, scratches, etc. of the surface of the object C1 can be suppressed even if the object C1 is made of a soft material.

[0029] Furthermore, as shown in FIG. 2(B), the arrangement density of the bristle bundles 15 in the first region A1 is lower than that in the second region A2. Therefore, the water or cleaning liquid sprayed from the liquid spray holes 17, 18 can easily reach the surface of the target object C1. Also, as shown in FIG. 4, the first component part 21A and the first component part 22A are arranged across the center line B2 of the operating rod 20. And, as shown in FIG. 2(A), the first component part 21A and the first component part 22A protrude in opposite directions from the pipe joint 37. Therefore, the reaction force when the water or cleaning liquid passes through the first component part 21A and the first component part 22A is offset. Therefore, the burden on the operator who holds the operating rod 20 by hand can be reduced, and the operating rod 20 and the bristle part 16 can be suppressed from vibrating in the left-right direction in FIG. 4. Also, the spray position of the cleaning liquid and the spray position of the water can be suppressed from fluctuating.

[0030] (Other explanations) An example of the technical meaning of the matters described in this embodiment is as follows. The cleaning device 10 is an example of a cleaning device. The cleaning brush 11 is an example of a cleaning brush. The bristle bundle 15 is an example of a bristle bundle. The bristle implantation section 16 is an example of a bristle implantation section. The liquid injection holes 17, 18 are examples of liquid injection holes. The operating rod 20 is an example of an operating rod. The boss section 19 is an example of a boss section. The connection section 29 is an example of a connection section. The liquid supply pipes 21, 22 are examples of liquid supply pipes. The water supply pipe 38 and the cleaning liquid supply pipe 47 are examples of auxiliary supply pipes. The water supply pipe 38 is an example of a water supply pipe. The cleaning liquid supply pipe 47 is an example of a cleaning liquid supply pipe. The pipe joint 37 is an example of a connection pipe. The support shaft 30 is an example of a support shaft. The first region A1 is an example of a first region. The second region A2 is an example of a second region. The water supply source 14 is an example of a water supply source. The cleaning liquid tank 12 is an example of a cleaning liquid tank. The cleaning liquid tank 12 and the water supply source 14 are an example of a liquid supply source. The liquid supply pipe 21 is an example of a first supply pipe. The liquid supply pipe 22 is an example of a second supply pipe. Water and the cleaning liquid are examples of liquids.

[0031] This embodiment is not limited to those disclosed using the drawings, and various modifications are possible within the scope of the present invention. For example, the shapes of the first and second regions shown in FIG. 2(B) may be any of a circle, a triangle, a rectangle, an ellipse, and the like. The object to be cleaned by the cleaning brush may be any of the exterior wall of a building, the roof of a building, roof tiles, window glass of a building, and the like. The liquid sprayed in the second step may be hot water instead of water. This embodiment describes a cleaning method that includes a first step of spraying a cleaning liquid from the cleaning brush toward the object, and a second step that is performed after the first step and sprays water from the cleaning brush toward the object. [Industrial Applicability]

[0032] INDUSTRIAL APPLICABILITY The present disclosure can be used as a cleaning method, cleaning brush, and cleaning device that can simultaneously perform the step of spraying a cleaning liquid onto an object and the step of scrubbing the object with a brush. [Explanation of symbols]

[0033] 10...cleaning device, 11...cleaning brush, 12...cleaning liquid tank, 14...water supply source, 15...hair bundle, 16...hair implantation section, 17, 18...liquid injection hole, 19...boss section, 20...operating rod, 21, 22...liquid supply pipe, 29...connection section, 30...support shaft, 37...pipe joint, 38...water supply pipe, 47...cleaning liquid supply pipe, A1...first region, A2...second region

Claims

1. A cleaning method for cleaning an object using a cleaning brush having a bristle bundle that is brought into contact with the object, a bristle implantation part to which the bristle bundle is attached, a liquid injection hole provided on the bristle implantation part and through which a liquid to be injected onto the object passes, and an operating rod connected to the bristle implantation part and held by a hand of an operator, comprising: A cleaning method in which the cleaning brush has a boss portion provided on the bristle portion, a connection portion that operably connects the operating rod to the boss portion, a liquid supply pipe fixed to the bristle portion and connected to the liquid injection hole, and a connection pipe provided on the liquid supply pipe and through which an auxiliary supply pipe through which liquid supplied to the liquid supply pipe flows is attached and detached.

2. 2. The cleaning method according to claim 1, A cleaning method, wherein the liquid supply pipe and the connection pipe are provided independently of the boss portion, the connection portion, and the operating rod.

3. The cleaning method according to claim 1 or 2, The operating rod has a hollow pipe structure, A cleaning method, wherein the liquid supply pipe and the connecting pipe are provided outside the operating rod.

4. The cleaning method according to claim 1 or 2, The connection portion has a support shaft extending in a direction along the hair implantation portion, The cleaning method, wherein the operating rod is operable about the support shaft within a plane perpendicular to the support shaft.

5. The cleaning method according to claim 1 or 2, A cleaning method, wherein, in a planar view of the bristle implantation portion, the arrangement density of the bristle bundles in a first region in which the liquid injection holes are provided is lower than the arrangement density of the bristle bundles in a second region in which the liquid injection holes are not provided.

6. The cleaning method according to claim 1 or 2, the liquid supply pipe includes a first supply pipe and a second supply pipe; The cleaning method, wherein the first supply pipe and the second supply pipe protrude in opposite directions from the connecting pipe.

7. A hair bundle that is brought into contact with an object; a hair implantation section to which the hair bundle is attached; a liquid injection hole provided in the bristle portion and through which a liquid to be injected onto the target passes; an operating rod connected to the hair implantation section and held by an operator; A cleaning brush having A boss portion provided on the hair implantation portion; a connection portion for operably connecting the operating rod to the boss portion; a liquid supply pipe fixed to the bristle portion and connected to the liquid injection hole; a connecting pipe provided on the liquid supply pipe and through which an auxiliary supply pipe through which the liquid supplied to the liquid supply pipe flows is attached and detached; A cleaning brush.

8. A cleaning device having a cleaning brush capable of spraying liquid onto an object and a liquid supply source that supplies liquid to the cleaning brush, The cleaning brush is A hair bundle that is brought into contact with the object; a hair implantation section to which the hair bundle is attached; a liquid injection hole provided in the bristle portion and through which a liquid to be injected onto the target passes; an operating rod connected to the hair implantation section and held by an operator; A boss portion provided on the hair implantation portion; a connection portion for operably connecting the operating rod to the boss portion; a liquid supply pipe fixed to the bristle portion and connected to the liquid injection hole; a connecting pipe provided on the liquid supply pipe and through which an auxiliary supply pipe through which the liquid supplied to the liquid supply pipe flows is attached and detached; having the liquid supply includes a water supply and a cleaning liquid tank; The auxiliary supply pipe is a water supply pipe connected to the water supply source; a cleaning liquid supply pipe connected to the cleaning liquid tank; A cleaning device comprising:

9. 9. The cleaning device according to claim 8, The operating rod has a hollow pipe structure, A cleaning device, wherein the liquid supply pipe, the connection pipe, the water supply pipe, and the cleaning liquid supply pipe are provided outside the operating rod.

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