Discharge attachment

Abstract

To provide a discharge attachment that can reduce discomfort felt by a user and is easy to use.SOLUTION: A discharge attachment includes: a peripheral wall part having a base end part to be attached to a nozzle cylinder and extending in an axial direction, which runs along a center axis of the nozzle cylinder; and a blocking part for blocking a tip-side opening of the peripheral wall part. In a portion from the peripheral wall part to the blocked part, a plurality of slit-shaped discharge ports that provide communication between the inside and the outside of the nozzle cylinder are formed at intervals around the center axis. Each discharge port has a first opening penetrating the peripheral wall part in a radial direction crossing with the center axis, and a second opening being continuous with the first opening and penetrating the blocked part in the axial direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a dispensing attachment. [Background technology]

[0002] In order to improve the appearance of the foam dispensed from the dispenser, a configuration is known in which a dispense attachment is attached to a nozzle cylinder having a discharge hole (see, for example, Patent Document 1 below). The attachment has a cylindrical portion arranged coaxially with the nozzle cylinder. The cylindrical portion has a plurality of openings extending in the axial direction of the cylindrical portion and spaced apart in the circumferential direction of the cylindrical portion. With this configuration, it is said that it is possible to dispense foam in a shape in which a plurality of vertically extending grooves are provided at intervals in the circumferential direction on the outer peripheral surface of a cone, such as that formed using whipped cream. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 110331 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned conventional technology, since the openings are opened at the tip edge of the tubular part, the part of the tubular part located between the adjacent openings remains as a cantilevered tongue part. In this case, when a user brings his / her hand close to the tubular part to receive the foam, the hand may come into contact with the tongue part, which may cause the user to feel uncomfortable.

[0005] The present invention provides a discharge attachment that can reduce the sense of discomfort felt by the user and is easy to use. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention employs the following aspects. One embodiment of the present invention relates to an ejection head, which is an ejection attachment that is attached to a nozzle tube from which foam is ejected, and has a base end that is attached to the nozzle tube, and is equipped with a peripheral wall portion that extends in an axial direction along the central axis of the nozzle tube, and a blocking portion that blocks the tip-side opening of the peripheral wall portion, and in the portion extending from the peripheral wall portion to the blocking portion, a plurality of slit-shaped ejection ports that connect the inside and outside of the nozzle tube are formed at intervals around the central axis, and the ejection ports are equipped with a first opening that penetrates the peripheral wall portion in a radial direction that intersects the central axis, and a second opening that is connected to the first opening and penetrates the blocking portion in the axial direction.

[0007] According to this aspect, when foam is discharged with the discharge attachment attached to the nozzle cylinder, the foam is discharged to the side of the discharge port through the first opening of the discharge port, and the foam is discharged in front of the discharge port through the second opening. The foam discharged from each discharge port is joined outside the discharge attachment, so that the foam can be shaped into a shape similar to that formed by whipped cream, with vertically extending concave portions spaced apart on the outer circumferential surface of a cone shape. Furthermore, in this embodiment, when a user brings his / her hand close to the discharge attachment to receive the foam discharged from the discharge port, even if the hand comes into contact with the tip (closing part) of the discharge attachment, the discomfort felt by the user can be reduced. Therefore, a user-friendly discharge container can be provided. Furthermore, compared to conventional cases where the tongue portion is formed as a cantilever, the rigidity of the tip of the discharge attachment can be ensured, so that the portion of the discharge attachment around the discharge port can be prevented from being deformed by the user's hand, thereby improving the durability of the discharge attachment.

[0008] In the ejection head according to the above aspect, it is preferable that the ejection ports are formed in a spiral shape extending from one side to the other side around the central axis as they move from the first side to the second side in their respective extension directions.

[0009] According to this aspect, since the foam is discharged in a spiral shape, it becomes easier to form the groove portion in a spiral shape. Effect of the Invention

[0010] According to the present invention, it is possible to provide a discharge attachment that is easy to use and reduces the sense of discomfort felt by the user. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a cross-sectional view of a discharge container according to the embodiment. [Diagram 2] FIG. 2 is a plan view of the dispenser according to the embodiment. [Diagram 3] FIG. 2 is a bottom view of the discharge attachment according to the embodiment, as viewed in a direction along the central axis. [Figure 4] FIG. 11 is a bottom view of the discharge attachment according to the modified example of the embodiment, as viewed in a direction along the central axis. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a discharge head according to the present invention will be described by taking a discharge container equipped with a discharge attachment as an example. The discharge container 1 shown in FIG. 1 includes a cylindrical container body 2 with a bottom, and a discharger 3 detachably attached to an opening 2a of the container body 2.

[0013] The dispenser 3 dispenses the liquid contained in the container body 2 in the form of foam. The dispenser 3 includes an attachment cap 11, a dispenser body 12, a dispenser head 13, and a dispenser attachment 14. The attachment cap 11 and the dispenser head 13 are formed in a topped cylindrical shape and are arranged coaxially with a common axis O1. Hereinafter, the direction along the common axis O1 is referred to as the up-down direction, the top wall 61 side of the dispenser head 13 is referred to as the upper side, and the open end side of the peripheral wall 23 of the attachment cap 11 along the common axis O1 is referred to as the lower side. The direction intersecting the common axis O1 as viewed from the up-down direction is referred to as the radial direction, and the direction going around the common axis O1 as viewed from the up-down direction is referred to as the circumferential direction.

[0014] The mounting cap 11 is detachably attached to the mouth portion 2a. The mounting cap 11 includes an annular top wall portion 21 disposed on the mouth portion 2a, a guide tube portion 22 extending upward from the inner peripheral edge of the top wall portion 21, and a peripheral wall portion 23 extending downward from the outer peripheral edge of the top wall portion 21 and attached to the mouth portion 2a. The peripheral wall portion 23 is attached to the mouth portion 2a by, for example, screwing or undercut fitting.

[0015] The dispenser body 12 is of a pump type equipped with a stem 31, a liquid discharge valve 32, a liquid piston 33, an air piston 34, a liquid cylinder 35, an air cylinder 36, an air-liquid mixing chamber 37, and a foaming member 38.

[0016] The stem 31 is inserted into the mounting cap 11 in an upwardly biased state so as to be movable downward. An annular valve seat 41 is provided on the inner circumferential surface of the upper end of the stem 31. The valve seat 41 protrudes radially inward from the stem 31 and then extends upward. The upper end opening edge of the valve seat 41 extends upward as it moves radially outward. The liquid discharge valve 32 is seated on the upper opening edge of the valve seat 41 so as to be able to move upward. The liquid discharge valve 32 switches between communication and blocking between the inside of the liquid cylinder 35 and the gas-liquid mixing chamber 37. The liquid discharge valve 32 is formed in a spherical shape.

[0017] The liquid piston 33 and the air piston 34 are linked to the up and down movement of the stem 31. The liquid piston 33 is housed in a liquid cylinder 35 so as to be able to slide up and down. The air piston 34 is housed in an air cylinder 36 so as to be able to slide up and down.

[0018] The air cylinder 36 is formed in a cylindrical shape with a bottom, and the liquid cylinder 35 is formed in a cylindrical shape. The air cylinder 36 and the liquid cylinder 35 are arranged coaxially with a common axis O1. The upper end opening of the air cylinder 36 is sealed on the lower surface of the top wall portion 21. In this embodiment, the air cylinder 36 and the liquid cylinder 35 are formed integrally. Specifically, the liquid cylinder 35 is formed with a smaller diameter than the air cylinder 36 and extends downward from the bottom of the air cylinder 36. The lower end of the stem 31 is located at the connection between the bottom of the air cylinder 36 and the upper end of the liquid cylinder 35. The stem 31 enters the liquid cylinder 35 when descending relative to the air cylinder 36 and the liquid cylinder 35.

[0019] The air piston 34 includes an outer sliding cylinder 45 fitted in the air cylinder 36 in an airtight state so as to be able to slide up and down, an inner sliding cylinder 46 arranged inside the outer sliding cylinder 45, a connecting plate 47 connecting the inner peripheral surface of the outer sliding cylinder 45 and the outer peripheral surface of the inner sliding cylinder 46, an air hole 48 passing through the connecting plate 47 in the vertical direction, and an air valve 49 opening and closing the air hole 48. The stem 31 is inserted into the inner sliding cylinder 46 so as to be vertically slidable. A plurality of stem grooves 31a extending in the vertical direction are formed at intervals in the circumferential direction on the outer circumferential surface of the stem 31 at a portion inserted into the inner sliding cylinder 46. The stem grooves 31a communicate with a communication gap S described later.

[0020] The gas-liquid mixing chamber 37 mixes the liquid from the liquid cylinder 35 and the air from the air cylinder 36. The gas-liquid mixing chamber 37 is provided in a portion of the stem 31 that is located above the valve seat 41. The gas-liquid mixing chamber 37 is provided in the upper end portion of the stem 31. The gas-liquid mixing chamber 37 can communicate with the inside of the air cylinder 36 through an air passage 55 that is constituted by the communication gap S, the stem groove 31a, and a vertical groove 62a described below.

[0021] The foaming member 38 is provided in a portion located above the stem 31 in the discharge head 13. The foaming member 38 is a mesh body, and two foaming members 38 are provided at a distance in the vertical direction. The foaming member 38 foams the liquid mixed with air in the gas-liquid mixing chamber 37. The foaming member 38 may be provided in the stem 31, and the discharger body 12 may not have the foaming member 38.

[0022] A ring-shaped protrusion 52 that protrudes radially outward is provided on the portion of the stem 31 that is located inside the air cylinder 36. The protrusion 52 is located below the stem groove 31a. The upper surface of the protrusion 52 abuts against the lower end of the inner sliding tube 46. This blocks communication between the lower end of the stem groove 31a and the inside of the air cylinder 36. In other words, the upper surface of the protrusion 52 abuts against the lower end of the inner sliding tube 46, blocking the opening of the air passage 55 in the air cylinder 36 and blocking communication between the inside of the air cylinder 36 and the gas-liquid mixing chamber 37.

[0023] The liquid piston 33 has a large diameter portion that fits into the liquid cylinder 35 so as to be vertically slidable, and a small diameter portion that is smaller in diameter than the large diameter portion and extends upward from the inner periphery of the large diameter portion. The small diameter portion of the liquid piston 33 fits into the lower portion of the stem 31. The large diameter portion of the liquid piston 33 protrudes downward from the lower end opening of the stem 31. The liquid piston 33 is urged upward by a urging member 57. The upper end of the urging member 57 supports the connection portion between the large diameter portion and the small diameter portion of the liquid piston 33. The lower end of the urging member 57 is supported on the inner surface of the lower portion of the liquid cylinder 35. The urging member 57 is, for example, a coil spring or a resin spring.

[0024] A valve member 59 is inserted radially inside the liquid piston 33, the liquid cylinder 35, and the biasing member 57. The valve member 59 is formed in a solid rod shape extending in the vertical direction. The upper end of the valve member 59 forms an upper valve body 59a that is releasably abutted within the upper end of the small diameter part of the liquid piston 33. The upper end of the upper valve body 59a is formed in a hollow inverted cone shape. The lower end of the valve member 59 serves as a lower valve body 59b that comes into contact with the inner surface of the lower end of the liquid cylinder 35 when the discharge head 13 is pressed down, blocking communication between the inside of the container body 2 and the inside of the liquid cylinder 35. When the discharge head 13 is in the standby state at its raised end position, the lower valve body 59b is spaced upward from the inner surface of the lower end of the liquid cylinder 35.

[0025] The discharge head 13 includes a top wall portion 61 provided above the stem 31 , and a mounting tube portion 62 extending downward from the top wall portion 61 and mounted on the stem 31 . The upper end of the inner sliding cylinder 46 is fitted into the lower end of the mounting cylinder 62 so as to be vertically slidable. A communication gap S, which is a vertical gap, is provided between the inner surface of the mounting cylinder 62 and the upper end edge of the inner sliding cylinder 46. A plurality of vertically extending vertical grooves 62a are formed at intervals in the circumferential direction on the inner circumferential surface of the mounting cylinder 62 in a portion located above the communication gap S. The upper ends of the vertical grooves 62a straddle the upper end opening edge of the stem 31 in the radial direction and open radially inward, and the lower ends open to the communication gap S.

[0026] As shown in FIG. 1 and FIG. 2, the mounting tube 62 is provided with a nozzle tube 63 extending in a front-rear direction intersecting the up-down direction. Specifically, the nozzle tube 63 extends downward as it moves forward (in a direction away from the mounting tube 62). The nozzle tube 63 is formed in a cylindrical shape with both ends in the front-rear direction open. The rear end opening of the nozzle tube 63 communicates with the upper end of the stem 31 through the upper end of the mounting tube 62. Therefore, the inside of the nozzle tube 63 can communicate with the inside of the container body 2 through the mounting tube 62. On the other hand, the front end opening of the nozzle tube 63 opens obliquely downward toward the front. Note that the dimension of the nozzle tube 63 along the up-down direction gradually increases as it moves forward, and the dimension along the left-right direction (the direction intersecting the front-rear direction when viewed from the up-down direction) gradually decreases toward the front. However, the cross-sectional area of ​​the nozzle tube 63 may be uniform.

[0027] As shown in FIG. 1 to FIG. 3, the discharge attachment 14 is detachably attached to the front end opening of the nozzle cylinder 63. The discharge attachment 14 is formed in a bottomed cylindrical shape arranged coaxially with the central axis O2 of the front end opening of the nozzle cylinder 63. That is, the discharge attachment 14 closes the front end opening of the nozzle cylinder 63. Specifically, the discharge attachment 14 includes a peripheral wall portion 71 and a closing portion 73. In the following description, the direction along the central axis O2 (axial direction) is referred to as the front-rear direction for convenience. Also, the direction intersecting the central axis O2 as viewed from the direction along the central axis O2 (front-rear direction) is referred to as the discharge radial direction (radial direction), and the direction circling around the central axis O2 may be referred to as the discharge circumferential direction.

[0028] The peripheral wall portion 71 is configured such that a mounting tube 81, a protruding tube 82, an enlarged diameter portion 83, and a tapered portion 84 are coaxial with the central axis O2 and are connected in order from the rear to the front. The mounting cylinder 81 is fitted into the nozzle cylinder 63 through the front end opening of the nozzle cylinder 63 . The protruding tube 82 is connected to the front of the mounting tube 81 forward of the nozzle tube 63. The outer diameter of the protruding tube 82 is equal to that of the mounting tube 81. The expanded diameter portion 83 is connected to the front of the protruding tube 82. The outer diameter of the expanded diameter portion 83 is larger than the outer diameter of the protruding tube 82. On the other hand, the inner diameter of the expanded diameter portion 83 is equal to the inner diameters of the mounting tube 81 and the protruding tube 82.

[0029] A flexible piece 85 is formed on the rear end surface of the expanded diameter portion 83 at a portion located outside the protruding tube 82 in the discharge radial direction. The flexible piece 85 extends rearward from the rear end surface of the expanded diameter portion 83. The outer peripheral surface of the flexible piece 85 is smoothly connected to the outer peripheral surface of the expanded diameter portion 83. The flexible piece 85 surrounds the entire circumference of the protruding tube 82 while being spaced apart from the outer peripheral surface of the protruding tube 82 in the discharge radial direction. That is, the flexible piece 85 is configured to be elastically deformable in a direction approaching or moving away from the protruding tube 82 in the discharge radial direction. In the illustrated example, the thickness of the flexible piece 85 in the discharge radial direction gradually becomes thinner from the front to the rear. The rear end surface of the flexible piece 85 is close to or in contact with the front end surface of the nozzle tube 63.

[0030] The tapered portion 84 is connected to the front of the expanded diameter portion 83. The outer diameter of the tapered portion 84 gradually decreases toward the front. On the other hand, the inner diameter of the tapered portion 84 is equal to the inner diameter of the expanded diameter portion 83. Therefore, the thickness of the tapered portion 84 in the discharge radial direction gradually decreases toward the front. Note that the tapered portion 84 is not an essential component.

[0031] The blocking portion 73 blocks the front end opening of the peripheral wall portion 71. Specifically, the blocking portion 73 is continuous with the front end edge of the tapered portion 84. The blocking portion 73 is formed in a disk shape with a uniform thickness over its entirety, with the thickness direction being the front-to-rear direction.

[0032] Here, the discharge attachment 14 is formed with a plurality of (for example, six) discharge ports 90 that communicate the inside and outside of the discharge attachment 14. The discharge ports 90 are formed in a slit shape extending from the peripheral wall portion 71 to the blocking portion 73. In the illustrated example, the discharge ports 90 are arranged at equal intervals in the discharge circumferential direction. Each discharge port 90 is formed radially with respect to the central axis line O2 when viewed from the front-rear direction. Meanwhile, each discharge port 90 is formed in an L-shape when viewed in a cross-sectional view. Specifically, each discharge port 90 has a side opening (first opening) 90a and a front opening (second opening) 90b. Note that each discharge port 90 is formed to have the same shape and the same size. Therefore, hereinafter, the details of the discharge port 90 will be described by taking one discharge port 90 as an example. However, each discharge port 90 may have a different shape from each other.

[0033] The side opening 90a penetrates the enlarged diameter portion 83 and the tapered portion 84 in the discharge radial direction and extends in the front-rear direction. That is, the side opening 90a is formed in a portion of the peripheral wall portion 71 that is located forward of the protruding tube 82. The width of the side opening 90a in the discharge circumferential direction is uniform over the entire length in the front-rear direction.

[0034] The front opening 90b is formed at a position of the blocking portion 73 corresponding to the side opening 90a in the discharge circumferential direction. The front opening 90b penetrates the blocking portion 73 in the front-rear direction and extends in the discharge radial direction. Specifically, the outer end of the front opening 90b in the discharge radial direction is connected to the front edge of the side opening 90a. In this case, the dimension of the front opening 90b in the discharge circumferential direction at the outer end of the front opening 90b in the discharge radial direction is equal to the dimension of the side opening 90a in the discharge circumferential direction. Therefore, the front opening 90b communicates with the side opening 90a in the entire discharge circumferential direction. The inner end of the front opening 90b in the discharge radial direction is formed in a triangular shape whose dimension in the discharge circumferential direction gradually decreases as it moves inward in the discharge radial direction when viewed from the front-rear direction. The front opening 90b is formed so as to overlap at least a part of the inside of the nozzle cylinder 63 when viewed from the front-rear direction, but not to overlap with the central axis O2. The front opening 90b may be in communication with the side opening 90a in a portion in the discharge circumferential direction (within the range of the side opening 90a in the discharge circumferential direction).

[0035] Next, a method of using the dispensing container 1 will be described. When the discharge head 13 is pressed down, the stem 31 and the liquid piston 33 move downward relative to the air piston 34 while compressing and deforming the biasing member 57 in the vertical direction. At this time, the communication gap S is reduced in the vertical direction. As a result, a gap is generated between the lower end of the inner sliding tube 46 and the upper surface of the protruding portion 52, and the inside of the air cylinder 36 and the inside of the gas-liquid mixing chamber 37 communicate with each other through the air passage 55.

[0036] At this time, as the liquid piston 33 moves downward, the upper end opening of the liquid piston 33 moves downward away from the upper valve body 59a, thereby connecting the inside of the liquid cylinder 35 to the inside of the stem 31. In addition, as the biasing member 57 is pressed down, the valve member 59 also moves downward. As a result, the lower valve body 59b closes the lower end opening in the liquid cylinder 35.

[0037] In this state, when the discharge head 13 is pressed further down, the air piston 34 moves downward with the air hole 48 closed by the air valve 49. This causes the air in the lower chamber located below the air piston 34 in the air cylinder 36 to be compressed. As a result, the air in the lower chamber is transferred from the gap between the lower end of the inner sliding tube 46 and the protruding portion 52 through the air passage 55 to the gas-liquid mixing chamber 37.

[0038] On the other hand, when the liquid piston 33 moves downward with the lower end opening of the liquid cylinder 35 closed by the lower valve body 59b, the liquid in the liquid cylinder 35 rises and reaches the inside of the stem 31. Then, the liquid pressure in the liquid cylinder 35 acts on the liquid discharge valve 32, causing the liquid discharge valve 32 to move upward away from the valve seat 41, and the liquid in the liquid cylinder 35 flows into the gas-liquid mixing chamber 37.

[0039] As described above, the liquid and air that flow into the gas-liquid mixing chamber 37 join together in the gas-liquid mixing chamber 37 and then foam when passing through the foaming member 38. The liquid (foam) foamed by the foaming member 38 passes through the mounting tube 62 and the nozzle tube 63 and then flows into the discharge attachment 14. The foam that flows into the discharge attachment 14 is discharged to the outside through each discharge port 90. At this time, the foam is discharged radially outward from the side opening 90a and forward through the front opening 90b. Then, the foam discharged from each discharge port 90 joins together outside the discharge attachment 14, so that the foam can be shaped into a shape in which vertically extending concave portions are provided at intervals on the outer circumferential surface of a cone shape, as is formed using whipped cream.

[0040] Thereafter, when the ejection head 13 is released from being pressed down, the liquid piston 33 is pushed upward by the elastic restoring force of the biasing member 57. As a result, the upper end opening of the liquid piston 33 comes into contact with the upper valve body 59a, and communication between the inside of the liquid cylinder 35 and the inside of the stem 31 is blocked. In addition, the lower valve body 59b moves upward away from the lower end opening of the liquid cylinder 35, and the inside of the container body 2 and the inside of the liquid cylinder 35 are connected, and the liquid in the container body 2 flows into the liquid cylinder 35. As the liquid in the container body 2 flows into the liquid cylinder 35, the inside of the container body 2 becomes negative pressure. Then, air in the upper chamber located above the air piston 34 in the air cylinder 36 is introduced into the container body 2 through an introduction hole provided in a part of the air cylinder 36 located above the outer sliding tube 45.

[0041] Furthermore, the stem 31 and the discharge head 13 rise together with the liquid piston 33, causing the protrusion 52 to come into contact with the lower end of the inner sliding tube 46. This blocks communication between the lower chamber of the air cylinder 36 and the gas-liquid mixing chamber 37 through the air passage 55. In this state, the stem 31 and the air piston 34 rise together, causing the internal pressure of the lower chamber to decrease, opening the air valve 49. As a result, outside air is drawn into the lower chamber through the inside of the top wall portion 21 and the air hole 48.

[0042] Thus, the discharge attachment 14 of this embodiment has a mounting cylinder (base end) 81 that is attached to the nozzle cylinder 63, and is provided with a peripheral wall portion 71 that extends along the central axis O2 of the nozzle cylinder 63, and a closing portion 73 that closes a front end opening (tip side opening) of the peripheral wall portion 71. In the portion extending from the peripheral wall portion 71 to the closing portion 73, a plurality of slit-shaped discharge ports 90 that communicate between the inside and outside of the nozzle cylinder 63 are formed at intervals around the central axis O2. According to this configuration, when the hand approaches the discharge attachment 14 to receive the foam discharged from the discharge port 90, even if the hand comes into contact with the front end portion (the closing portion 73) of the discharge attachment 14, the discomfort felt by the user can be reduced. Therefore, a user-friendly discharge container 1 can be provided. Furthermore, compared to the conventional case where the tongue portion is formed as a cantilever, the rigidity of the front end portion of the discharge attachment 14 can be ensured, so that the portion of the discharge attachment 14 around the discharge port 90 can be prevented from being deformed by the user's hand. As a result, the durability of the discharge container 1 can be improved.

[0043] Moreover, in the discharge attachment 14 of this embodiment, the tapered portion 84 is formed at the front end of the peripheral wall portion 71, so that the boundary portion between the peripheral wall portion 71 and the blocking portion 73 can be smoothly connected. This can further reduce the sense of discomfort felt by the user.

[0044] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Addition, omission, substitution, and other modifications of the configuration are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the scope of the attached claims. In the above embodiment, the dispenser main body 12 is of a pump type, but the present invention is not limited to this configuration. The dispenser main body 12 may be configured to dispense foam by squeezing the container body 2 to deform. In the above-described embodiment, the discharge attachment 14 is attached to the nozzle cylinder 63 facing forward, but the present invention is not limited to this configuration. The discharge attachment 14 may be attached to the nozzle cylinder 63 facing in the up-down direction. In the above embodiment, the blocking portion 73 is formed in a flat plate shape (disk shape), but the blocking portion 73 is not limited to this configuration. The blocking portion 73 may be a curved surface that protrudes forward, or the like.

[0045] In the above-described embodiment, a configuration in which six discharge ports 90 are provided has been described, but the present invention is not limited to this configuration. The number of discharge ports 90 can be changed as appropriate as long as it is two or more, for example, four or eight. In the above-described embodiment, a configuration in which the mounting cylinder 81 is fitted into the nozzle cylinder 63 has been described, but the present invention is not limited to this configuration. A configuration in which the nozzle cylinder 63 is fitted into the mounting cylinder 81 may also be used, or a configuration in which the mounting cylinder 81 and the nozzle cylinder 63 are attached by screwing or the like may also be used.

[0046] In the above embodiment, the configuration in which each outlet 90 is linearly formed at the same position in the circumferential direction over the entire length has been described, but the present invention is not limited to this configuration. For example, each outlet 90 may extend in a serpentine manner in the circumferential direction. Also, as shown in FIG. 4, each outlet 90 may extend in a spiral shape from one side to the other side in the circumferential direction as it moves from the front to the rear. With this configuration, the foam is discharged in a spiral shape, making it easier to form the grooves in a spiral shape.

[0047] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described modified examples may be combined as appropriate. [Explanation of symbols]

[0048] 13: Discharge head 14: Discharge attachment 63: Nozzle tube 71: Peripheral wall part 73: Occlusion 81: Mounting tube (base end) 90:Discharge port 90a: Lateral rear opening (first opening) 90b: Front opening (second opening) O2: Central axis

Claims

1. A discharge attachment that is attached to a nozzle tube from which foam is discharged, a peripheral wall portion having a base end portion attached to the nozzle barrel and extending in an axial direction along a central axis of the nozzle barrel; a closing portion that closes a tip side opening of the peripheral wall portion, a plurality of slit-shaped discharge ports that communicate between the inside and the outside of the nozzle cylinder are formed at intervals around the central axis in a portion extending from the peripheral wall portion to the closing portion, The discharge port is a first opening penetrating the peripheral wall in a radial direction intersecting the central axis; A discharge attachment comprising: a second opening communicating with the first opening and penetrating the closure portion in the axial direction.

2. 2. The discharge attachment according to claim 1, wherein the plurality of discharge ports are formed in a spiral shape extending from one side to the other side around the central axis as they move from the base end side toward the closing portion side.

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