JP3064938U - Seal packing at water hose joint - Google Patents

Abstract

(57) [Summary] [PROBLEMS] When rubber of a seal packing material is deteriorated, unequally deformed or worn, the sealing performance deteriorates in a relatively short time. An inner press contact portion of a seal packing has an upward gradient with respect to a front end surface of a joint cylinder from an intersection M with a contact front end surface of an outer press contact portion to a sharp end. The outer press contact portion 8d is formed in a horizontal plane parallel to the front end surface of the joint cylinder 2 from the intersection M with the contact front end surface of the inner press contact portion 8c to the sharp tip. By doing, seal packing 8,8
At the time of press-fitting, first, the inner press-contact portions 8c, 8c are gradually press-pressed with an appropriate elastic pressure from the distal end to the proximal end thereof, and thereafter, the outer press-contact portions 8d, 8d are press-pressed together. Due to this, the mutual contact end surfaces are in close contact with each other in a vacuum without embracing air therebetween, thereby maintaining the suction force, and connecting the inner press contact portion 8c and the outer press contact portion 8d to the inner peripheral corner D of the packing mounting groove 7. It is characterized in that a strong elastic crimping force is applied to the entire seal packing 8 by supporting the outer peripheral corners E in a well-balanced manner.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to a seal packing for pressure-sealing a joint surface of water supply hose joints when they are joined.

[0002]

[Prior art]

 Conventionally, the seal end of the joint tube of the water supply hose joint has an inverted trapezoidal shape with a tip protruding from the end surface, and an annular seal packing whose contact end surface is formed as a flat surface parallel to the joint end surface of the joint tube. It is attached (Jitsuho 1-7907).

[0003]

[Problems to be solved by the invention]

 The problem to be solved is that, with the conventional seal packing, the flat contact end faces are evenly pressed against each other to seal, so that when the rubber of the material deteriorates, deforms irregularly, or wears, it takes a relatively short time. The point is that the sealing performance is deteriorated.

[0004]

[Means for Solving the Problems]

 In this invention, the inner pressure contact part of the seal packing is formed as an inclined surface that forms an ascending slope with respect to the tip surface of the joint cylinder from the point of intersection of the contact tip surface with the contact tip surface of the outer pressure contact part to the sharp tip. In addition, the outer pressure contact part is formed in a horizontal plane parallel to the tip end face of the joint cylinder from the point of intersection of the contact tip face with the contact tip face of the inner pressure contact part to the sharp tip, so that the seal packings are When crimping is performed, first, the inner press-contact portions are gradually press-bonded from the distal end to the proximal end, and thereafter, the outer press-contact portions are press-fitted to each other. A vacuum seal is provided without holding air between them, and the suction force is maintained, and the inner and outer press-contact parts are well-balanced and supported by the inner and outer corners of the packing mounting groove, respectively. all It is intended to mainly characterized in that so as to impart a strong elastic compression force.

[0005]

[Embodiment of the invention]

 When the seal packings are crimped together, first, the inner press-contact portions are gradually press-fitted from the distal end to the proximal end, and then the outer press-contact portions are press-fitted together. The packing mounting groove is configured to be supported by the inner peripheral corner and the outer peripheral corner, respectively.

[0006]

【Example】

 The water supply hose joint 1 according to the present invention is formed by fitting a joint operating ring 3 that is similarly annularly formed around the outer circumference of a joint tube 2 that is cylindrically molded by precision casting or the like. I have.

A pair of hook claws 4, 4 each formed in a hook shape are formed on the outer periphery of the fastening operation ring 3 so that the hook-shaped inner concave portions 5 face each other in the radial direction, and the tip end of the joint tube 2. And projecting toward the front of the joint end face, and extending in a wedge shape along the tightening rotation direction (clockwise rotation) of the fastening operation ring 3 on the outer periphery of both half circumferential portions between the roots of the hook claws 4, 4. Protruding wedge ridges 6, 6 are formed.

An annular packing mounting groove 7 having an L-shaped cross section is formed on the distal end surface of the joint tube 2 by an upright portion and a horizontal fitting portion bent horizontally inward from the lower end thereof. An annular seal packing 8 made of a soft elastic material such as synthetic rubber is mounted inside.

The seal packing 8 has a root portion fitted into the packing mounting groove 7 and has an L-shaped cross section formed by an upright portion 8a and a horizontal protrusion 8b bent horizontally from the lower end to the inner peripheral side. The outer circumference of the upright portion 8a is formed substantially equal to the outer circumference of the packing mounting groove 7, and the inner circumference of the upright portion 8a is formed to have a larger diameter than the inner circumference of the packing mounting groove 7, and together with the lateral projection 8b. When the upright portion 8a is fitted into the packing mounting groove 7, a slight gap is formed between the upright portion 8a and the inner peripheral surface thereof.

The protruding distal end of the seal packing 8 is provided with an inner press-contact portion 8c which protrudes in a laterally sharp shape in a wedge-shaped cross section on the inner peripheral side, and an outer press-contact portion 8d which protrudes in the same manner on the outer peripheral side. The inner press contact portion 8c is about 10 degrees (about 7 to 13 degrees) with respect to the front end surface of the joint cylinder 2 from the point of intersection M with the contact front end surface of the outer press contact portion 8d to the sharp tip A. , Of which 10 degrees are preferred). The outer press-contact portion 8d has a contact tip surface extending from an intersection M with the contact tip surface of the inner press-contact portion 8c to a sharp tip B. It is formed in a horizontal plane parallel to the tip end surface of the joint cylinder 2 to the extent that it extends.

The intersection M is set at substantially the center (center point) of the width (thickness) of the upright portion 8a.

The rear surface of the inner press contact portion 8c is formed as an upwardly inclined surface from a position C lower than the front end surface of the joint tube 2 to the front end A on the inner peripheral surface of the upright portion 8a, and water is supplied as shown in FIG. In the non-joined state of the hose joint 1, the water supply hose is in a non-contact state with the inner peripheral side corner D between the distal end surface of the joint tube 2 and the inner peripheral surface of the packing mounting groove 7 as shown in FIG. 2. When the joints 1 and 1 are joined together and the seal packings 8 and 8 are pressed against each other, the inner side just before tilting so that the contact end surfaces of the inner press-contact portions 8 c are parallel to the end surface of the joint tube 2. The inner pressure contact portion 8c is brought into contact with the peripheral corner portion D, and is supported from the rear side against the fall of the inner press contact portion 8c toward the distal end surface side of the joint tube 2, so that the inner press contact portions 8c, 8c are completely pressed against each other. .

The rear surface of the outer press-contact portion 8b is formed as an upwardly sloped surface from the outer peripheral corner E between the distal end surface of the joint cylinder 2 and the outer inner peripheral surface of the packing mounting groove 7 to the sharpened distal end. When the inner press-contact portions 8c and 8c are press-bonded to each other, the outer press-contact portions 8d and 8d are also configured to be press-pressed with the rear-end bases thereof supported by the outer-side corner portions E slightly later than this. .

Therefore, when the seal packings 8 and 8 are pressure-bonded to each other, first, the inner press-contact portions 8c and 8c gradually start press-fitting with an appropriate resilient pressure from the distal end to the proximal end thereof, and then the outer press-contact portions 8d and 8c. 8d are pressure-bonded to each other, so that the contact end surfaces are in close contact with each other in a vacuum without embracing air between them so as to maintain a suction force, and the inner pressure contact portion 8c and the outer pressure contact portion 8d are formed in a packing mounting groove. The inner peripheral corner D and the outer peripheral corner E of 7 are supported in a well-balanced manner, and a strong elastic crimping force is applied.

In particular, since the base end of the inner press-contact portion 8c can secure a sufficient thickness between the point M and the point C, the bending strength of the inner press-contact portion 8c is maintained, and the elastic repulsive force at the time of press bonding is maintained. Thus, the pressure on the inner peripheral side of the packing where the water pressure acts directly can be sufficiently ensured.

The wedge ridges 6, 6 are provided inside the hook claws 4, 4 projecting from the counterpart joint cylinder 2 when the pair of joint cylinders 2, 2 are brought into contact with each other via the packings 8, 8. A gap 9 is provided between the tip and the hook 4 adjacent to the tip of the recess 5 so that the hook 4 can come and go freely.

Although not shown, ring grooves having semicircular cross-sections facing each other are formed on both rotating and sliding surfaces to enable the turning ring 3 to smoothly rotate with respect to the joint cylinder 2. A large number of bearing balls are loaded between the ring grooves.

A water supply hose 10 is connected to the inside of the joint tube 2.

When the connecting cylinders 2, 2 configured as described above are abutted and fastened to each other, the hooking claw 4 and the tip of the wedge ridge 6 in the fastening operating ring 3 of one of the connecting cylinders 2 are connected. When the hook claws 4 projecting from the fastening operation ring 3 of the other joint cylinder 2 are aligned with the position of the gap 9 of the other, the joint cylinders 2 are brought into contact with each other and the hook claws 4 Are located on the outer periphery of the engagement operating ring 3 of the other party, respectively.

In this state, when the opposing fastening operation rings 3, 3 are relatively rotated in the direction of the tips of the wedge ridges 6, 6, the respective wedge ridges 6, 6 are engaged with the other hooks 4, 4. And the sliding surfaces of the hook claws 4 slidably move along the circumferentially inclined surfaces of the rear surfaces of the wedge ridges 6, 6, so that they come into pressure contact with the rear surface. The cylinders 2 and 2 are tightened in a relative direction, and are tightly joined to each other through packings 8 and 8.

[0021]

[Effect of the invention]

 As described above, according to the present invention, when the seal packings are press-fitted, the inner press-contact portions first gradually start press-fitting from the distal end to the base end, and then the outer press-contact portions press-fit each other. The contact end surfaces of the two are in close contact with each other in a vacuum without embracing air between them so that the suction force is maintained and the inner and outer press contact parts are in contact with the inner and outer corners of the packing mounting groove. Each is supported in a well-balanced manner, and a strong elastic crimping force is applied.

In particular, since the inner press-contact portion is inclined upward and the base end thereof can secure a sufficient thickness, the bending strength of the inner press-contact portion is maintained, and the water pressure is directly applied by the elastic repulsion force during crimping. A sufficient crimping force on the inner peripheral side of the packing that acts can be secured.

As a result, even if the material of the seal packing is slightly deteriorated, deformed unequally, or abraded, the sealing property can be ensured durably.

[Brief description of the drawings]

FIG. 1 is a partial vertical sectional front view showing a state before press-contact of a seal packing of the present invention.

FIG. 2 is a partial vertical sectional front view showing a state of the seal packing of the present invention when pressed.

FIG. 3 is a front view of a water supply hose fitting according to the present invention.

FIG. 3 is a partially cutaway front view showing a joint state of a water supply hose joint according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water supply hose joint 2 Connection tube 3 Fastening operation ring 4 Hook claw 5 Hook-shaped inner concave part 6 Wedge protrusion 7 Packing mounting groove 8 Seal packing 8a Upright portion 8b Lateral protrusion 8c Inner press contact portion 8d Outer press contact portion 9 Gap 10 Water supply hose M Intersection point of the contact tip surface of the inner press-contact portion and outer press-contact portion A Tip of the inner press-contact portion B Tip of the outer press-contact portion C Intersection point of the base end of the inner press-contact portion and the upright portion D Inner-side corner portion E Outer-side corner portion

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[Procedure amendment]

[Submission date] August 11, 1999 (1999.8.1)
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a partial vertical sectional front view showing a state before press-contact of a seal packing of the present invention.

FIG. 2 is a partial vertical sectional front view showing a state of the seal packing of the present invention when pressed.

FIG. 3 is a front view of a water supply hose fitting according to the present invention.

FIG. 4 is a partially cutaway front view showing a joint state of a water supply hose joint according to the present invention.

[Description of Signs] 1 Water supply hose joint 2 Connection tube 3 Fastening operating ring 4 Hook claw 5 Hook-shaped inner concave portion 6 Wedge protrusion 7 Packing mounting groove 8 Seal packing 8a Upright portion 8b Lateral protrusion 8c Inner press contact portion 8d Outer press contact portion 9 Gap 10 Water supply hose M Intersection point of contact front end surface of inner press-contact part and outer press-contact part A Tip of inner press-contact part B Tip of outer press-contact part C Intersection point of base end of inner press-contact part and upright part D Inner-side corner E Outer corner 9 Gap 10 Water supply hose

Claims (1)

[Utility model registration claims] 1. A wedge-shaped cross section is formed on a tip end portion of a joint tube, which is mounted in an annular packing mounting groove provided on a front end surface of the joint tube, and which protrudes from the groove into an inner peripheral side and an outer peripheral side. An annular seal packing made of a soft elastic material provided with an inner press-contact portion and an outer press-contact portion, wherein the inner press-contact portion has a contact tip surface extending from an intersection with a contact tip surface of the outer press-contact portion to a sharp tip. The outer press-contact portion is formed on an inclined surface that forms an ascending slope with respect to the front end surface of the joint tube, and the outer press-contact portion has a tip end of the joint tube from the intersection with the contact front surface of the inner press-contact portion to the sharp tip. The rear surface of the inner press-contact portion is formed on a horizontal plane parallel to the surface, and the rear surface of the inner press-contact portion has an inclined surface having an upward slope from a position lower than the distal end surface of the joint cylinder on the inner peripheral surface of the upright portion below the protruding distal end portion. Formed in the water hose connection In the mating state, the inner peripheral corner between the end surface of the joint cylinder and the inner peripheral surface of the packing mounting groove is in a non-contact state, and the water supply hose joints are joined to press the seal packings together. When the inner press-contact portion contacts the inner peripheral corner just before tilting so that the contact front end surfaces of the inner press-contact portions are parallel to the front end surface of the joint tube, the inner press-contact portion falls down to the front end surface side of the joint tube. A seal packing in a water supply hose joint, which is configured to be supported from the rear side with respect to the water supply hose.