JP2006297306A - Nozzle cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nozzle cap producible at a lower cost than before. <P>SOLUTION: In the nozzle cap 30, a seal member 40 is engaged with a ceiling wall 34 only by pushing the seal member 40 to a ceiling hole 35 formed in the ceiling wall 34 of a cap main body 30H. Accordingly, the assembly work of the seal member 40 is made easy and the installation cost for the work can be saved and the nozzle cap 30 can be thus produced at a low cost. When the nozzle cap 30 is attached to the tip end part of the nozzle 10 by screwing, a nozzle close adhesion part 43 disposed in the seal member 40 is closely attached to the tip end 10C of the nozzle 10 to close the aperture of the tip end of the nozzle 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a nozzle cap that is screwed to a tip portion of a nozzle.

As shown in FIG. 4, this type of conventional nozzle cap is provided with an annular seal member 1 at the back, and this seal member 1 is in close contact with the tip of the nozzle. In addition, a cylindrical locking wall 2 penetrating the central hole 1A of the seal member 1 is provided at the center of the inner portion, and the locking portion 3 projecting laterally from the tip of the cylindrical locking wall 2 is provided on the seal member 1. (For example, refer to Patent Document 1)
US200301759A1 (Figs. 4, 7, 11)

  By the way, when manufacturing the above-described conventional nozzle cap, the cylindrical locking wall 2 is inserted into the center hole 1A of the seal member 1 before the locking portion 3 is formed, and in this state, the cylindrical locking wall 2 is inserted. For example, it is necessary to heat the front end of the substrate by ultrasonic vibration or the like and push it outward. For this reason, the assembling work is time-consuming and the equipment costs for the ultrasonic vibration device and the like are increased, which increases the manufacturing cost.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a nozzle cap that can be manufactured at a lower cost than in the past.

  A nozzle cap (30) according to the invention of claim 1 made to achieve the above object is a nozzle cap (30) screwed and attached to the tip of the nozzle (10). A ceiling wall (34) with which the tip (10C) is abutted, a ceiling hole (35) formed through the center of the ceiling wall (34), and a seal member (40) fitted and mounted in the ceiling hole (35) A head portion (41) provided at one end of the sealing member (40) and locked to the outer end surface (34A) of the ceiling wall (34), and a ceiling portion provided at the other end of the sealing member (40). It is characterized in that it is provided with a nozzle contact portion (43) that is laid on the inner end surface (34B) of the wall (34) and can be in close contact with the tip of the nozzle (10).

  According to a second aspect of the present invention, in the nozzle cap (30) according to the first aspect, the nozzle contact portion (43) is sandwiched between the tip surface (10A) of the nozzle (10) and the ceiling wall (34). Provided with a first contact portion (44) and a second contact portion (45) that enters the inside of the nozzle (10) and contacts the inner edge portion (10B) of the tip opening of the nozzle (10). Has characteristics.

  According to a third aspect of the present invention, in the nozzle cap (30) according to the second aspect, the inner central concave portion (46) is recessed from the second contact portion (45) of the seal member (40). Has characteristics.

  According to a fourth aspect of the present invention, in the nozzle cap (30) according to any one of the first to third aspects, the head portion (41) is tapered, and the guide surface (41B) is provided on the outer periphery of the head portion (41). It is characterized by the formation.

  The invention according to claim 5 is characterized in that, in the nozzle cap (30) according to claim 4, the outer center concave portion (47) is formed in the center of the head portion (41).

  According to a sixth aspect of the present invention, in the nozzle cap (30) according to any one of the first to fifth aspects, the outer diameter (D2) of the nozzle cap (30) is screwed to the outer side of the base end portion of the nozzle (10). The nut (20) is characterized by being smaller than the inner diameter (D1).

  The invention of claim 7 is characterized in that in the nozzle cap (30) according to claims 1 to 6, the color of the seal member (40) and the color of the ceiling wall (34) are made different from each other.

[Inventions of Claims 1 and 2]
According to the configuration of claim 1, the head portion (41) is located outside the ceiling wall (34) simply by pushing the sealing member (40) into the ceiling hole (35) of the ceiling wall (34) in the nozzle cap (30). While being locked to the end surface (34A), the nozzle contact portion (43) is locked to the inner end surface (34B) of the ceiling wall (34), and the seal member (40) is fixed to the nozzle cap (30). Thus, according to the nozzle cap (30) of this invention, the assembly | attachment operation | work of a sealing member (40) becomes easy and does not require installation cost. That is, according to the present invention, it is possible to manufacture the nozzle cap (30) at a lower cost than in the past. When the nozzle cap (30) of the present invention is screwed and attached to the tip of the nozzle (10), the nozzle contact portion (43) provided in the seal member (40) becomes the tip (10C) of the nozzle (10). The tip opening of the nozzle (10) is sealed. Here, according to the configuration of the second aspect, the first contact portion (44) of the nozzle contact portion (43) is in close contact with the tip surface (10A) of the nozzle (10), and the first contact portion (43) of the nozzle contact portion (43). Two close contact portions (45) are in close contact with the inner edge portion (10B) of the nozzle (10). That is, the nozzle contact portion (43) is in close contact with the two locations of the tip surface (10A) and the inner edge portion (10B) of the tip portion of the nozzle (10), and the sealing performance is improved.

[Invention of claim 3]
According to the configuration of the third aspect, when the compressed gas is discharged from the nozzle (10), the gas pressure is received on the inner surface of the inner central recess (46) of the seal member (40), and the second contact portion (45). ) Is pushed outward, and the degree of adhesion with the inner edge (10B) of the nozzle (10) increases.

[Inventions of Claims 4 and 5]
According to the configuration of the fourth aspect, when the tapered tip end portion of the sealing member (40) is inserted into the ceiling hole (35) and pushed in, the guide surface (41B) and the inner surface of the ceiling hole (35) The head part (41) is reduced in diameter by sliding contact and passes through the ceiling hole (35). Here, according to the structure of Claim 5, since the outer center recessed part (47) is recessedly formed in the center of the head part (41), the head part (41) can be easily reduced in diameter.

[Invention of claim 6]
According to the configuration of claim 6, since the outer diameter (D2) of the nozzle cap (30) is smaller than the inner diameter (D1) of the nut (20), the nozzle cap (30) is screwed onto the nozzle (10). In this state, the nut (20) can be attached to and detached from the nozzle (10), and the working efficiency is improved.

[Invention of Claim 7]
According to the structure of Claim 7, since the color of the sealing member (40) and the color of the ceiling wall (34) were made different from each other, whether or not the sealing member (40) was assembled to the ceiling wall (34). Can be easily confirmed. In addition, you may make it the structure which can distinguish a nozzle cap (30) by mounting | wearing the nozzle cap (30) with the sealing member (40) from which a color differs.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, reference numeral 10 denotes a nozzle, which has a cylindrical shape with a flow path 11 passing through the center. A female screw portion 12 is formed on the inner peripheral surface near the tip of the nozzle 10, and the valve core 50 is screwed there. The valve core 50 is formed by assembling a movable shaft 52 in a penetrating state inside a cylindrical core body 51. The movable shaft 52 is biased to one side by a coil spring (not shown) provided in the core body 51, and the valve body 53 provided at one end of the movable shaft 52 is pressed against one end surface of the core body 51 by the biasing force. It has been. Thereby, the valve core 50 is always closed, and the flow path 11 of the nozzle 10 is blocked. When the movable shaft 52 is pushed or when the compressed gas is charged, the valve body 53 is separated from one end surface of the core body 51, the valve core 50 is opened, and the flow path 11 is opened.

  The outer shape of the nozzle 10 is tapered from the proximal end portion toward the distal end portion. Further, a flange 15 projecting sideways is provided at the base end portion of the nozzle 10, a first male screw portion 14 is formed at the intermediate portion, and a second male screw portion 13 is formed at the distal end portion. ing.

  A nut 20 is screwed into the first male screw portion 14. The nut 20 is formed with a female screw portion 20A on the inner surface of a cylindrical body, and its outer surface is polygonal when viewed from the axial direction. The female screw portion 20A of the nut 20 and the first male screw portion 14 of the nozzle 10 are 10V2 or 10V1 screws defined by ISO (International Organization for Standardization).

  A nozzle cap 30 according to the present invention is screwed to the second male screw portion 13. The nozzle cap 30 is formed by assembling the seal member 40 to the cap body 30H, and as shown in FIG. 2, the nozzle cap 30 has a cylindrical structure with one end and a ceiling wall 34 at one end of the cylindrical wall 31 as a whole. A screw portion 32 is formed on the inner peripheral surface of the cylindrical wall 31, and the screw portion 32 is screwed into the second male screw portion 13. A cylindrical curved surface 31 </ b> A having a size corresponding to approximately one pitch of the screw thread is provided between the screw portion 32 and the ceiling wall 34 on the inner peripheral surface of the cylindrical wall 31. The inner diameter of the cylindrical curved surface 31 </ b> A is substantially the same as the screw thread diameter of the screw portion 32. An anti-slip vertical rod 33 is formed on the outer peripheral surface of the cylindrical wall 31 over the entire circumference.

  The ceiling wall 34 is thicker than the cylindrical wall 31, and a ceiling hole 35 is formed through the center of the ceiling wall 34. Specifically, an annular projecting wall 34T is formed on the outer end surface 34A of the ceiling wall 34 along the outer peripheral edge. The cross section of the annular projecting wall 34T is substantially semi-elliptical, and the curved surface of the annular projecting wall 34T is continuous with the outer peripheral surface of the cylindrical wall 31. Further, the outer end surface 34 </ b> A left between the annular projecting wall 34 </ b> T and the ceiling hole 35 is a flat surface orthogonal to the axial direction of the nozzle cap 30. Further, the inner end surface 34 </ b> B of the ceiling wall 34 is a flat surface that is generally orthogonal to the axial direction of the nozzle cap 30, and an outer edge portion thereof is orthogonal to the cylindrical curved surface 31 </ b> A of the cylindrical wall 31.

  The ceiling hole 35 is a circular hole smaller than the inner diameter of the nozzle 10. Further, an opening edge inside the ceiling hole 35, that is, a corner portion formed by the inner peripheral surface of the ceiling hole 35 and the inner end surface 34B is chamfered to form a guide curved surface 34G. On the other hand, the opening edge outside the ceiling hole 35, that is, the corner formed by the inner peripheral surface of the ceiling hole 35 and the inner end surface 34B is not chamfered, and has a so-called pin-angle shape. .

  A sealing member 40 is fitted and attached to the ceiling hole 35. The seal member 40 includes, in the axial direction, a head portion 41 positioned outside the ceiling wall 34, a column portion 42 press-fitted into the ceiling hole 35, and a nozzle contact portion 43 positioned inside the ceiling wall 34. Lined up.

  The head portion 41 has a substantially truncated cone shape as a whole, and has a tip diameter smaller than the ceiling hole 35 and a proximal diameter larger than the ceiling hole 35. Specifically, the cylindrical surface 41A provided on the base end side of the head portion 41 is orthogonal to the outer end surface 34A of the ceiling wall 34 and has substantially the same height as the annular projecting wall 34T. The guide surface 41B on the upper side from the cylindrical surface 41A is rounded so that the diameter decreases toward the tip of the head portion 41 and slightly expands outward. Further, the base end surface 41 </ b> C of the head portion 41 is a flat surface orthogonal to the axial direction of the seal member 40. The right angle formed by the base end surface 41 </ b> C and the outer peripheral surface 42 </ b> A of the cylindrical portion 42 has a pin angle shape corresponding to the outer opening edge of the ceiling hole 35. Further, an outer center concave portion 47 that is depressed in a mortar shape is formed at the center of the tip surface of the head portion 41. In the injection mold of the seal member 40, an injection gate port is disposed at a portion of the seal member 40 where the bottom surface of the outer central recess 47 is molded.

  The nozzle contact portion 43 has a disk shape as a whole and is laid on the inner end surface 34 </ b> B of the ceiling wall 34. A corner portion formed by the laying surface 43 </ b> A on the inner end surface 34 </ b> B and the outer peripheral surface 42 </ b> A of the cylindrical portion 42 in the nozzle contact portion 43 has a curved shape corresponding to the inner opening edge of the ceiling hole 35. Further, the outer peripheral surface of the nozzle contact portion 43 is fitted to the cylindrical curved surface 31 </ b> A of the cylindrical wall 31.

  A frustoconical second contact portion 45 protruding toward the nozzle 10 is formed on the center side of the nozzle contact portion 43 from the position near the outer edge. A portion of the nozzle contact portion 43 outside the second contact portion 45 is a disk-shaped first contact portion 44. 44 A of nozzle opposing surfaces which face the female screw part 12 side among the 1st close_contact | adherence parts 44 are orthogonal to the axial direction of the sealing member 40. As shown in FIG. Further, the side surface 45A of the second contact portion 45 is rounded so as to decrease in diameter toward the tip of the second contact portion 45 and slightly expand outward. In addition, an inner central recess 46 is formed in a recessed manner at the center of the tip surface of the second contact portion 45. The inner central recess 46 reaches the boundary between the nozzle contact portion 43 and the cylindrical portion 42.

  As described above, the nozzle cap 30 of the present embodiment does not have a locking structure for locking the seal member 40 to the cylindrical wall 31, and is a lock for locking the seal member 40 to the ceiling wall 34. It has a stop structure (specifically, a ceiling hole 35 and an opening edge of the ceiling hole 35). Thereby, the thickness of the cylindrical wall 31 can be reduced, and the outer diameter D2 of the cylindrical wall 31 is made smaller than the inner diameter D1 of the nut 20.

  The configuration of the present embodiment is as described above. Next, the effect of this embodiment is demonstrated. In order to manufacture the nozzle cap 30, the seal member 40 and the other cap main body 30H are separately molded, and the seal member 40 is assembled to the cap main body 30H. For this purpose, the seal member 40 is inserted from the head portion 41 side into the opening on the opposite side of the ceiling wall 34 in the cylindrical wall 31 of the cap body 30H. Then, for example, the bar member is abutted into the inner central recess 46 of the seal member 40, and the seal member 40 is pushed into the ceiling hole 35 of the ceiling wall 34. Then, the tapered tip portion of the seal member 40 enters the ceiling hole 35, and when further pushed, the head portion is caused by sliding contact between the guide surface 41B and the inner surface of the ceiling hole 35 (specifically, the guide curved surface 34G). 41 is reduced in diameter and passes through the ceiling hole 35. Here, since the outer center concave portion 47 is formed in the seal member 40 at the center of the head portion 41, the head portion 41 is easily reduced in diameter and the head portion 41 passes through the ceiling hole 35.

  When the head portion 41 passes through the ceiling hole 35 and is restored to the original shape, the base end surface 41C of the head portion 41 is locked to the outer end surface 34A of the ceiling wall 34 as shown in FIG. The laying surface 43 </ b> A of the portion 43 is locked to the inner end surface 34 </ b> B of the ceiling wall 34 and the seal member 40 is fixed to the ceiling wall 34. As described above, according to the nozzle cap 30 of the present embodiment, the seal member 40 is fixed to the nozzle cap 30 only by pushing the seal member 40 into the ceiling hole 35, and the assembly work is easier and the equipment cost is higher than before. It does not take. Therefore, the nozzle cap 30 can be manufactured at a low cost.

  When the nozzle cap 30 is screwed onto the tip end portion of the nozzle 10, the tip end face 10 </ b> A of the nozzle 10 is in close contact with the first contact portion 44 of the nozzle contact portion 43 provided in the seal member 40, and the nozzle contact portion 43. The inner edge portion 10 </ b> B at the tip opening of the nozzle 10 is in close contact with the second contact portion 45. That is, the nozzle contact portion 43 is in close contact with the two positions of the tip surface 10A and the inner edge portion 10B of the nozzle 10. Thereby, the sealing performance is improved as compared with the conventional nozzle cap. Further, when the compressed gas leaks from the valve core 50 provided in the nozzle 10 and the pressure in the nozzle cap 30 increases, the gas pressure is received on the inner surface of the inner central recess 46 in the seal member 40, and the second contact portion 45 is pushed outward, the degree of adhesion with the inner edge portion 10B of the nozzle 10 is increased, and the sealing performance is further enhanced.

  When the nozzle cap 30 is attached to the nozzle 10, the distal end portion of the movable shaft 52 in the valve core 50 is in a state of protruding into the inner central concave portion 46 of the seal member 40.

  Now, in order to fix the nozzle 10 to, for example, a sheet metal member 16 provided in a vehicle or the like with the nozzle cap 30 attached to the nozzle 10, a packing 17 is laid on the flange 15 of the nozzle 10 as shown in FIG. The nozzle 10 is inserted from the nozzle cap 30 side into the nozzle mounting hole 16 </ b> A formed through the sheet metal member 16. Then, another packing 18 and a washer 19 are inserted into the nozzle 10 penetrating the sheet metal member 16 from the tip side, and the nut 20 is screwed into the first male screw portion 14 of the nozzle 10. At this time, since the outer diameter D2 of the nozzle cap 30 of this embodiment is smaller than the inner diameter D1 of the nut 20 screwed into the first male screw portion 14 of the nozzle 10, the nozzle cap 30 is attached to the nozzle 10. The nut 20 can be inserted through the nozzle 10 while being screwed. The same applies when the nut 20 is removed from the nozzle 10. Thereby, the efficiency of the operation | work which attaches / detaches the nozzle 10 to the sheet metal member 16 improves.

  Further, according to the configuration of the nozzle cap 30 of the present embodiment, since the seal member 40 is exposed on the outer surface of the ceiling wall 34, it is easily confirmed whether or not the seal member 40 is attached to the ceiling wall 34. be able to. Here, if the color of the seal member 40 and the color of the ceiling wall 34 are different from each other, it is easier to confirm whether or not the seal member 40 is assembled to the ceiling wall 34. Furthermore, the nozzle cap 30 can be configured to be distinguishable by attaching seal members 40 of different colors to the nozzle cap 30.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

(1) In the above embodiment, the nozzle cap 30 is attached to the nozzle 10 provided with the valve core 50 inside, but it may be attached to the nozzle 10 not provided with the valve core 50 inside.

(2) In the above-described embodiment, the first and second contact portions 44 and 45 are configured to be in close contact with the two locations of the nozzle 10, but either the first or second contact portion 44 or 45 is disposed. It is good also as a structure which is equipped and closely_contact | adheres to one place of the nozzle 10. FIG.

(3) The seal member 40 may not have the outer center recess 47 or the inner center recess 46.

Sectional drawing of the nozzle and nozzle cap which concern on one Embodiment of this invention. Enlarged sectional view of the nozzle cap Cross section of nozzle and nozzle cap before attaching nut Cross section of conventional nozzle cap

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Nozzle 10A Front end surface 10B Inner edge 20 Nut 30 Nozzle cap 34 Ceiling wall 34A Outer end surface 34B Inner end surface 35 Ceiling hole 40 Seal member 41 Head part 41A Cylindrical surface 41B Guide surface 43 Nozzle contact part 43A Laying surface 44 First contact part 45 Second contact portion 46 Inner center recess 47 Outer center recess

Claims (7)

A nozzle cap (30) screwed onto the tip of the nozzle (10),
A ceiling wall (34) against which the tip (10C) of the nozzle (10) is abutted;
A ceiling hole (35) formed through the center of the ceiling wall (34);
A seal member (40) fitted and mounted in the ceiling hole (35);
A head portion (41) provided at one end of the seal member (40) and engaged with an outer end surface (34A) of the ceiling wall (34);
Provided at the other end of the seal member (40), is laid on the inner end surface (34B) of the ceiling wall (34), and has a nozzle contact portion (43) that can be in close contact with the tip of the nozzle (10). A nozzle cap (30), characterized in that.   The nozzle contact portion (43) includes a first contact portion (44) sandwiched between a tip surface (10A) of the nozzle (10) and the ceiling wall (34), and an inner side of the nozzle (10). The nozzle cap (30) according to claim 1, further comprising a second contact portion (45) that enters the nozzle and contacts the inner edge portion (10B) of the tip opening of the nozzle (10).   3. The nozzle cap (30) according to claim 2, wherein an inner center recess (46) is formed in the seal member (40) on the center side of the second contact portion (45).   The nozzle cap (30) according to any one of claims 1 to 3, wherein the head portion (41) is tapered and a guide surface (41B) is formed on an outer periphery of the head portion (41). .   The nozzle cap (30) according to claim 4, characterized in that an outer central recess (47) is formed in the center of the head portion (41).   The outer diameter (D2) of the nozzle cap (30) is smaller than the inner diameter (D1) of a nut (20) screwed into the outer base end of the nozzle (10). The nozzle cap (30) according to any one of 5 above. The nozzle cap (30) according to claim 1, wherein the color of the sealing member (40) and the color of the ceiling wall (34) are different from each other.

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