JP4387179B2 - Hose fixing bracket - Google Patents

Description

  The present invention relates to a hose fixing metal fitting.

  A gas appliance or the like is provided with a hose attachment port called a nipple. The nipple is covered with a hose such as a rubber tube, and gas can be supplied to the gas appliance from the other through the hose. The structure for attaching a hose using such a nipple is not limited to a gas appliance, and is also used for connecting a hose used as a passage for liquid or the like, for example.

As described above, when connecting a hose serving as a gas or liquid passage to a device that handles the fluid having a nipple or connecting hoses to each other using a connector having a nipple, Various hose fixtures have been proposed to prevent loose connections and hose falling off the nipple.
As such a hose fixing metal fitting, there is one that uses a metal ball (steel ball) that is slippery and presses the hose against the nipple. For example, this kind of hose fixing metal fitting is described in Patent Document 1. Joints have been proposed. The joint includes a sleeve that receives (sits) the ball together with the ball. The sleeve with the ball disposed on the outer peripheral surface is disposed on the outside of the hose attached to the nipple, and further on the outer surface of the tubular portion extending from the outer peripheral portion (flange portion) of the nipple. The ball is pressed against the hose surface side.

Specifically, this hose fixing metal fitting has a tube shaft (nipple) for attaching rubber or a similar tube (hose) to the inner end of the joint member so as to extend the through hole, and an outer end of this tube shaft. Appropriate extensions are provided on the outer periphery with an internal tapered surface across the gap cylinder chamber, and the gap cylinder chamber has sleeves each having an outer end collar and an inner end claw that bites into a pipe attached to the pipe shaft. The sleeve is provided with a notch groove and a hole for seating the locking ball on the inner end claw side of the sleeve, and the sleeve or tube is retracted to bring the ball into contact with the tapered surface. It is a joint of rubber or a similar pipe that is designed to bite and hold the claw into the pipe.
By adopting such a configuration, the ball pressed by the tapered surface bends the sleeve, and the end claw bites into the rubber tube, so that the rubber tube is securely fixed.

Japanese Utility Model Publication No. 48-108215

First, however, such a fixing method is also effective for a soft rubber tube or the like. However, a hose made of a hard material with small elasticity does not stand up, and a sufficient hose cannot be fixed. . In other words, it is suitable for rubber pipes but is not suitable for other hoses. In addition, in a soft rubber tube or the like, the end claws provided on the sleeve may bite into the hose, which may damage the hose.
Secondly, in this joint, there is a concern that the outer shell of the sleeve protruding outside may enter the nipple side due to force majeure, and in this case, the pressed state of the sleeve by the ball is released. Therefore, the fear that the hose may be displaced from the nipple during long-term use cannot be wiped out.
Thirdly, in the above-mentioned metal fitting, the sleeve has both a claw that bites into the hose and a ball receiving portion. That is, the sleeve is provided with a configuration for receiving the ball so that the ball does not shift from a predetermined position and a configuration for receiving the pressure from the ball and pressing the hose. On the other hand, in consideration of ease of attachment during use, it would be desirable to employ a thin-walled sleeve that is easy to bend when trying to bite the nail into the hose easily with a relatively small force. However, if the thickness of the sleeve is reduced, it becomes difficult to secure the depth of the receiving portion necessary for reliably receiving the ball with a simple configuration, and the momentary receiving portion is increased in thickness. Accordingly, it becomes shallow, and there is a risk of the ball falling off from a predetermined position.
Fourth, at the time of manufacturing, in the above-described metal fitting, the ball is accommodated in the cylinder chamber from the hole formed in the extension portion after the sleeve is inserted into the extension portion. Then, after the ball is accommodated, the hole is closed with a separate ring. As described above, it is necessary to perform an intricate work of seating the ball on the sleeve receiving portion (sleeve hole) in the cylinder chamber through the hole in the extension, and it is necessary to prepare a ring for closing the hole in the extension. It was.

The first to sixth inventions of the present application eliminate the structure in which the claw bites into the hose when in use, and the sleeve can securely fix such a hose to the nipple regardless of the hardness of the hose. In addition, the first problem is solved by extending the life of the hose without damaging a relatively flexible hose such as a rubber tube.
In particular, the third to fifth inventions of the present application avoid the situation in which the position of the sleeve is displaced by force majeure and the hose is loosened or detached from the nipple during use, thereby solving the second problem.
In the second to fifth inventions of the present application, the sleeve has a dedicated configuration for holding the hose so that it can be easily bent to reduce the diameter smoothly. Can be achieved without affecting the holding of the ball to solve the third problem.
Furthermore, the fourth invention of the present application can accommodate the ball in the outer cylinder together with the inner cylinder and the middle cylinder at the time of manufacture, and requires a complicated operation to arrange the ball at a predetermined position. It is assumed that this can be easily performed without any problem, and the fourth problem is solved.

The hose fixing metal fitting according to the first invention of the present application is attached to the outer periphery of the hose h end portion with respect to the end portion of the hose h fitted on the outer periphery of the hose attachment port n provided in the device or connection tool for handling fluid. The hose h end is prevented from loosening from the hose attachment port n, and the following configuration is adopted.
That is, the hose fixing bracket includes at least one inner cylinder 1 disposed on the outer periphery of the hose, an outer cylinder 3 disposed on the outer side of the inner cylinder 1, and at least one disposed between the inner cylinder 1 and the outer cylinder 3. Two balls 4 and a middle cylinder 2 disposed outside the inner cylinder and inside the outer cylinder 3 are provided. The inner cylinder 1 is provided with a notch portion extending from the front end to the rear end, so that the diameter of the inner cylinder 1 is reduced in the entire axial direction when receiving a force from the outside, and the outer peripheral surface of the hose h end portion over the entire inner peripheral surface. Can be pressed. The fixture has a tapered surface that comes into contact with the ball 4 . The middle cylinder 2 includes a penetrating portion that accommodates the ball 4. The penetrating portion penetrates from the outer peripheral surface of the middle cylinder 2 to the inner peripheral surface. The ball 4 received in the penetrating portion can contact the outer peripheral surface of the inner cylinder 1 through the penetrating portion. By moving the outer cylinder 3 in the axial direction with respect to the middle cylinder 2 , the inner peripheral surface of the outer cylinder pushes the ball in contact with the tapered surface, and the outer peripheral surface of the inner cylinder 1 is pressed by the ball 4.

The hose fixing bracket according to the second invention of the present application is the hose fixing bracket according to the first invention of the present application, wherein the tapered surface is provided on the inner peripheral surface of the outer cylinder 3 and the axial direction of the outer cylinder 3 The inner diameter of the penetrating portion is gradually reduced toward either the front or rear of the ball 4, and the inner diameter of the penetrating portion is larger than the outer diameter of the ball 4.

  In the hose fixing metal fitting according to the third invention of the present application, in the hose fixing metal fitting according to the second invention of the present application, the inner cylinder 2 includes an engaging portion, and the outer cylinder 3 includes an engaged portion. Prepare. By moving the outer cylinder 3 in the axial direction with respect to the middle cylinder 2, the ball 4 is pressed by the taper surface and pushed into the penetration portion, and the outer surface of the inner cylinder 1 is pressed by the ball 4. At this time, by locking the locked portion to the locking portion of the middle cylinder 2, the outer cylinder 3 cannot be returned to the middle cylinder 2, and the pressed state of the ball 4 by the tapered surface is maintained.

  The hose fixing bracket according to the fourth invention of the present application is the hose fixing bracket according to the third invention of the present application, wherein the middle cylinder 2 is inserted into the outer cylinder 3 from one end of the outer cylinder 3. And the outer peripheral surface is equipped with the subtaper surface which makes an outer diameter gradually small about an axial direction corresponding to the taper surface of the outer cylinder 3. As shown in FIG. Said penetration part penetrates toward the inside of the middle cylinder 2 from a sub taper surface. The penetrating portion has an inner diameter larger than the outer diameter of the ball 4, and the ball 4 does not fall out of the penetrating portion by coming into contact with the outer peripheral surface of the inner cylinder 1. It can rotate freely. The locked portion is a small inner diameter portion adjacent to the maximum inner diameter portion of the tapered surface and having an inner diameter smaller than the maximum inner diameter portion of the tapered surface. The locking portion is a small outer diameter portion that is adjacent to the maximum outer diameter portion of the sub-tapered surface and has a smaller outer diameter than the maximum outer diameter portion of the sub-tapered surface. By moving the outer cylinder in the direction in which the taper surface approaches the sub-taper surface with respect to the middle cylinder 2, the above-mentioned locked portion gets over the maximum outer diameter portion of the sub-taper surface and enters the lock portion, The locked portion is locked by the locking portion.

  In the hose fixing metal fitting according to the fifth invention of the present application, in the hose fixing metal fitting according to the fourth invention of the present application, the engaging portion of the middle tube 2 is exposed to the outside from one end of the outer tube 3 in the locked state. And at least the exposed portion is provided with a cutout portion along the axial direction of the middle cylinder 2 to reduce the diameter of at least the exposed portion by receiving force on the outer peripheral surface, and from the locking portion. It is possible to retract the locked portion.

  A hose fixing bracket according to a sixth aspect of the present invention is the hose fixing bracket according to any one of the first to fourth aspects of the present invention, wherein the ball 4 is more than the first sphere 4a and the first sphere 4a. At least two kinds of balls 4 of the second sphere 4b having a small diameter are provided. The middle cylinder 2 includes at least two penetrating portions of the first penetrating portion and the second penetrating portion at different positions in the axial direction as the penetrating portion. The first penetrating portion receives the first sphere 4a, and the second penetrating portion is positioned on the side where the diameter of the tapered surface of the outer cylinder 3 is small with respect to the first penetrating portion and the second sphere 4b. It is something to accept.

By implementing the first to sixth inventions of the present application, the inner cylinder provided with the notch from the front end to the rear end is pressed from the outer cylinder via the ball, The hose can be pressed against the nipple. In other words, the force is not concentrated by concentrating the force locally on the hose and fixed by biting at one point, but it is pressed on the entire inner cylinder inner surface, so it is limited to a hose made of a soft material. Even if it is a hard hose (a nail | claw does not stand), it can fix to a nipple reliably.
Thus, the present invention provides a hose fixture having versatility that can be used for various hoses regardless of the hardness of the hose. In addition, even in a hose formed of a soft material such as a rubber tube, damage due to local biting can be prevented and the life can be extended.
In particular, in the sixth invention of the present application, by pressing the inner cylinder through the balls (first sphere and second sphere) at two or more different positions in the axial direction of the inner cylinder, the inner cylinder is not biased. By reducing the diameter of the hose, it is possible to hold the hose more securely over the entire inner peripheral surface of the inner cylinder.

In addition to the above-described effects, the first to sixth inventions of the present application, in addition to the above-described effects, a portion for receiving the ball (middle cylinder) so that the ball does not deviate from a predetermined position, and a hose that receives pressure from the ball. The part to be pressed (inner cylinder) could be made independent.
Thereby, the thickness of the part for receiving the ball (middle cylinder) and the part for holding the hose (inner cylinder) can be set separately.
Accordingly, it is possible to adopt a thin sleeve (inner cylinder) that can be smoothly reduced in diameter and can be easily bent during manufacturing, and selection of such a sleeve is necessary for receiving the ball (for the through portion). ) The thickness for securing the depth is not sacrificed. That is, by making the configuration for pressing the hose and the configuration for receiving the ball independent, it was possible to achieve both ease of bending of the portion that presses the hose and securing the wall thickness for holding the ball.
Further, by adopting such a structure, by providing a space between the outer peripheral surface of the inner cylinder and the inner peripheral surface of the middle cylinder so that the ball does not enter the inner side of the inner cylinder, It is also possible to reduce the thickness.

Furthermore, in addition to the above-described effects, by implementing the third to sixth inventions of the present application, a locking portion and a locked portion are formed separately from the structure for pressing the hose, and the locked portion is By locking to the locking portion, the hose can be pressed reliably without fear of release due to force majeure, and the hose can be reliably prevented from loosening or falling off the nipple.
In particular, by implementing the fourth invention of the present application, at the time of manufacturing the metal fitting, the ball can be disposed in the penetrating portion of the middle cylinder, and the ball can be accommodated in the outer cylinder together with the inner cylinder and the middle cylinder. Therefore, the assembly of the other members to the outer cylinder can be temporarily completed. Further, since the inner cylinder and the middle cylinder are inserted into the outer cylinder using one end of the outer cylinder, it is not necessary to form a separate entrance for inserting the ball into the outer cylinder.
At the time of the above insertion, the inner cylinder and the inner cylinder that receives the ball are pushed into the outer cylinder against the small inner diameter portion called the locked portion of the outer cylinder. It can rotate freely in the circumferential direction of the inner cylinder, and when inserting, the operator not only pushes the inner cylinder and ball in the axial direction but also twists it by rotating it in the circumferential direction Therefore, even a weak person can smoothly perform this insertion work. In addition, as described above, the inner cylinder and the middle cylinder are made independent of the degree of freedom of the ball, and the inner cylinder needs to be moved in a direction other than the axial direction with respect to the hose, particularly when fixing to the hose. In addition, only the middle cylinder can be twisted in the circumferential direction with respect to the inner cylinder and the outer cylinder (with the above rotation of the ball), and the operation can be performed more smoothly.

  In the hose fixing bracket according to the fifth invention of the present application, in a state where the locked portion is locked to the locking portion, the diameter of the middle cylinder is reduced by clamping the exposed portion with a tool such as a pliers, The locked portion can be retracted from the locking portion, and the hose can be released by retracting the outer tube from the middle tube.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a hose fixing metal fitting according to an embodiment of the present invention. 1A is a partially cutaway side view of a hose fixing metal fitting according to an embodiment of the present invention, and FIG. 1B is a side view of the partially cutout essential part of FIG. 1C. Fig. 1 (D) is a schematic end view taken along line XX of Fig. 1 (C). 2 (A) is a partially cutaway side view showing the state during the assembly of the hose fixing metal fitting, and FIG. 2 (B) is a partially cutaway side view after the assembly is completed. ) Is a schematic cross-sectional view showing a method suitable for the assembling work of FIG. 3 (A) and 3 (B) are overall side views showing a mounting method when the hose fixing bracket is used. FIG. 4 is a longitudinal sectional view showing a state in which the attaching operation shown in FIG. 3 is completed.
For convenience of explanation, in each figure, F indicates the front of the hose fixing bracket 100, and B indicates the rear.

The hose fixing metal fitting 100 according to the present invention has a hose h loosened from the hose attachment port n with respect to the hose h fitted on the outer periphery of a hose attachment port n (generally referred to as a nipple) provided in a device or connector for handling fluid. (Figs. 3 and 4). This hose fixing metal fitting 100 is generally fitted with a hose attached to the nipple during use, unlike what is generally called a socket, that is, provided at the end of the hose and used as a connection to the nipple. It reinforces the connection of the hose to the nipple. Therefore, the user selects and uses one that matches the diameter of the hose.
Hereinafter, the configuration of the hose fixing metal fitting 100 will be described in detail.

  As shown in FIGS. 1 (A) and 1 (C), the hose fixing metal fitting 100 is arranged on the outer side of the inner cylinder 1 and the metal inner cylinder 1 arranged on the outer periphery of the hose h, which are separately formed. The metal inner cylinder 2, the metal outer cylinder 3 disposed on the outer side of the inner cylinder 2, and a plurality of balls 4... 4 that are steel balls. The inner cylinder 1, the middle cylinder 2 and the outer cylinder 3 are arranged concentrically (the centers Y of the cylinders 1 to 3 are the same).

  The inner cylinder 1 is formed of an elastic metal material that is deformed by receiving a force from another and recovers the original shape by removing the force. The inner cylinder 1 is a C-shaped cylindrical body having a cut-out portion 11 provided from the front end to the rear end. The inner cylinder 1 having such a configuration can be reduced in diameter in the entire axial direction (front and rear F and B directions) of the inner cylinder 1 when the outer peripheral surface receives a force from the outside. In a state where no force is applied from others, the inner diameter of the inner cylinder 1 is larger than the outer diameter of the hose h.

As shown in FIG. 1A, the outer cylinder 3 is a cylindrical body whose inner peripheral surface is formed as a tapered surface 30 that gradually extends from the rear B to the front F in the axial direction and gradually decreases the inner diameter.
A front end portion 33 that extends toward the center Y of the outer tube 3 and has a smaller inner diameter than the minimum inner diameter portion of the tapered surface 30 is formed in the front opening 31 of the outer tube 3. That is, the inner peripheral surface of the front end portion 33 provided in front of the tapered surface 30 adjacent to the minimum inner diameter portion of the tapered surface 30 constitutes the edge of the front opening 31 of the outer cylinder 3.
A rear end portion 34 that extends toward the center Y of the outer tube 3 and has a smaller inner diameter than the maximum inner diameter portion of the tapered surface 30 is formed in the rear opening 32 of the outer tube 3. That is, the inner peripheral surface of the rear end portion 34 provided at the rear of the tapered surface 30 adjacent to the maximum inner diameter portion of the tapered surface 30 constitutes the edge of the rear opening 32 of the outer cylinder 3.
In the outer cylinder 3, the inner peripheral surface (tapered surface 30) and the front end portion 33 and the rear end portion 34 constitute a receiving portion for the middle tube 2.
Further, the rear end portion 34 of the outer cylinder 3 constitutes a locked portion (hereinafter, the rear end portion 34 is referred to as a locked portion 34 as necessary).

The middle cylinder 2 is a cylindrical body formed of an elastic metal material that is deformed by receiving a force from another and is restored to its original shape by removing the force.
The outer peripheral surface of the middle cylinder 2 corresponds to the tapered surface 30 of the outer cylinder 3 and is a tapered surface 20 that gradually decreases in outer diameter from the rear to the front in the axial direction (hereinafter referred to as the sub-taper surface 20). However, the inner peripheral surface of the intermediate cylinder 2 is not a tapered surface, and the inner diameter is constant at each position in the axial direction. The outer diameter of the tip of the middle cylinder 2 is smaller than the inner diameter of the rear opening 32 of the outer cylinder 3 and larger than the inner diameter of the front opening 31 of the outer cylinder 3. The outer diameter of the rear end of the middle cylinder 2 is larger than the inner diameter of the rear opening 32 of the outer cylinder 3.
A front end portion 23 that extends toward the center Y of the middle cylinder 2 and has a smaller inner diameter than the inner peripheral surface of the middle cylinder 2 is formed in the front opening 21 of the middle cylinder 2. That is, the inner peripheral surface of the front end portion 23 constitutes the edge of the front opening 21 of the middle cylinder 2.
A rear end portion 25 that extends toward the center Y of the middle cylinder 2 and has a smaller inner diameter than the inner peripheral surface of the middle cylinder 2 is formed in the rear opening 22 of the middle cylinder 2. That is, the inner peripheral surface of the rear end portion 25 constitutes the edge of the rear opening 22 of the middle cylinder 2. The inner diameter of the front end part 23 and the rear end part 25 of the middle cylinder 2 is smaller than the outer diameter of the inner cylinder 1, and the inner peripheral surface of the middle cylinder 2 and the front end part 23 and the rear end part inside the middle cylinder 2. 25, the receiving part of the inner cylinder 1 is comprised.
Further, at the rear end of the middle cylinder 2, cuts 27 to 27 extending toward the front of the middle cylinder 2 are formed. However, the cuts 27 ... 27 do not reach the tip of the middle cylinder 2. As shown in FIG. 1 (D), a plurality of the cuts 27... 27 are formed at different positions in the circumferential direction r of the middle cylinder 2. In this embodiment, the cuts 27 ... 27 are formed at four locations. However, the cuts 27... 27 can be carried out even if there are three or less or five or more.
By forming the cuts 27 as described above, the inner cylinder 2 can reduce the diameter of the rear part by pressing the outer periphery of the rear part.

The middle cylinder 2 includes through portions 26... 26 that accommodate the balls 4. The penetrating portion 26 penetrates from the outer peripheral surface (tapered surface 30) of the middle cylinder 2 to the inner peripheral surface. The inner diameter of the penetrating portion 26 is larger than the outer diameter of the ball 4 to be accommodated. For this reason, each ball | bowl 4 ... 4 can freely rotate toward each direction within the penetration part 26 ... 26 accommodated.
As shown in FIG. 1D, the middle cylinder 2 is provided at different positions in the circumferential direction r. In this embodiment, the penetrating portions 26 are provided at four locations in the circumferential direction r of the middle cylinder 2. Further, in this embodiment, as shown in FIG. 1A, the middle cylinder 2 includes two through portions 26, ie, a first through portion 26a and a second through portion 26b, at two different positions in the axial direction. (Thus, a total of eight penetrating portions 26 are provided together with the first and second portions).
This metal fitting includes at least two kinds of balls 4 as the above-described balls 4, that is, a first sphere 4 a and a second sphere 4 b having a diameter smaller than that of the first sphere 4 a. The first through portions 26a ... 26a receive the first spheres 4a ... 4a, and the second through portions 26b ... 26b are tapered surfaces of the outer cylinder 3 with respect to the first through portions 26a ... 26a. 30 is located on the side where the inner diameter is small, and receives the second spheres 4b... 4b.
A locking part 24 is provided on the outer periphery of the rear end of the middle cylinder 2. The locking portion 24 is formed at the rear of the sub-tapered surface 20 adjacent to the maximum outer-diameter portion of the sub-tapered surface 20, and has a smaller outer diameter than the maximum outer-diameter portion of the sub-tapered surface 20. It is a diameter part.

Next, a procedure for assembling the above components and completing the hose fixture 100 will be described.
As shown in FIG. 1B, a force is applied to the outer peripheral surface of the inner cylinder 1 to reduce the diameter of the inner cylinder 1, and from the front end opening 21 or the rear opening 22 of the middle cylinder 2 to the inside of the middle cylinder 2. The inner cylinder 1 is inserted. The inner cylinder 1 released from the above force returns to its original diameter in the middle cylinder 2.
And as shown to FIG.1 (C) (D), the corresponding ball | bowl 4 (4a, 4b) is inserted in each penetration part 26 (26a, 26b).
The ball 4 inserted into the through portion 26 of the middle cylinder 2 contacts the outer peripheral surface of the inner cylinder 1 and is stopped by the through portion 26 and does not enter the inside of the middle cylinder 2.

2A, the operator applies a force f1 along the axial direction (of the middle cylinder 2 and the outer cylinder 3) to the middle cylinder 2, and the rear opening 32 of the outer cylinder 1 is applied. Then, the middle cylinder 2 is pushed into the outer cylinder 1 (from its tip). At this time, the maximum outer diameter portion of the ball 4 (first sphere 4a) and the sub-tapered surface 20 comes into contact with the locked portion 34 of the outer cylinder 3. Then, the diameter of the rear part is reduced, and the above-mentioned respective parts are caused to be hidden in the locked part 34 of the outer cylinder 3. At this time, in particular, the middle cylinder 2 is rotated with respect to the outer cylinder 3 by applying the force f2 along the circumferential direction of the middle cylinder 2 together with the force f1 along the axial direction. That is, the middle cylinder 2 is pushed into the outer cylinder 3 while twisting. As a result, as in the case where a person climbs the slope obliquely, the above insertion operation can be performed more easily than in the case where the person pushes linearly only in the axial direction.
The smooth rotation in the circumferential direction of the inner cylinder 2 during such insertion can be freely rotated in each direction within each ball 4 through portion 26 as described above. This is because even when it comes into contact with the locked portion 34, it can rotate in a direction that follows the rotation of the middle cylinder 2 in the circumferential direction.
About the ball | bowl 4, the axial direction front side of the outer cylinder 3 is employ | adopted for the 2nd ball | bowl 4b located in the axial direction front with respect to the 1st ball | bowl 4a as mentioned above with a smaller diameter than the 1st ball | bowl 4a. The taper surface 30 is made to have a smaller inner diameter than the rear inner diameter. With such a correspondence, the balls 4... 4 can be evenly brought into contact with the tapered surface 30 and the inner cylinder 1 can be pressed without any deviation in the axial direction.
As shown in FIG. 2 (B), after diving the locked portion 34, the ball 4 (first sphere 4 a) hits the locked portion 34 and prevents the middle cylinder 2 from moving back. This prevents the outer cylinder 3 from falling off.
When the assembly of the respective members is completed as described above, the hose fixing bracket 100 is completed as shown in FIG.

  In addition, when the middle cylinder 2 is inserted into the outer cylinder 3, it is difficult to rotate the middle cylinder 2 in the circumferential direction, but as shown in FIG. 2C, a bag body m such as a plastic bag is covered. As a result, the balls 4... 4 can be prevented from spilling out from the through portions 26. After the middle cylinder 2 is inserted, the bag body m may be pulled out from the front opening 31 of the outer cylinder 3.

A method of using the hose fixing metal fitting 100 will be described by taking as an example a case where a hose h is attached to a hose attachment opening n (hereinafter referred to as a nipple n) provided in a gas appliance or the like.
As shown in FIG. 3A, first, the hose fixing metal fitting 100 is attached to the hose h before being attached to the nipple n. This attachment is achieved by inserting the tip h1 (connection end) of the hose h from the tip of the hose fixing bracket 100 (the front opening 31 of the outer cylinder 3) into the hose fixing bracket 100, thereby inserting the hose h into the inside of the inner cylinder 1. As shown in FIG. 3B, the tip h1 of the hose h is exposed from the rear end of the hose fixing bracket 100 (the rear opening 32 of the outer cylinder 3).
The tip h1 side of the hose h exposed from the hose fixing metal fitting 100 is put on the outer peripheral surface n1 of the nipple n. And the hose fixing metal fitting 100 is arrange | positioned in the position covered with the nipple n of the hose h. After the arrangement, the middle cylinder 2 is further moved away from the outer cylinder 3 (front opening portion) from the state shown in FIG. 2B (the state where the locked portion 34 and the locking portion 24 are separated). 31 side). This operation can be performed smoothly by pressing the outer cylinder 3 against the middle cylinder 2.

Thus, by moving the outer cylinder 3 in the axial direction with respect to the middle cylinder 2, the tapered surface 30 of the outer cylinder 3 presses the balls 4. The inner cylinder 1 is pushed by the pushed balls 4... 4 to reduce its diameter and press the outer peripheral surface of the hose h to press the hose h against the outer peripheral surface n1 of the nipple n. At this time, the diameter of the entire inner cylinder 1 is reduced, and the outer peripheral surface of the hose h is pressed by the entire inner peripheral surface of the inner cylinder 1.
As shown in FIG. 2 (B), a plurality of step portions (unevenness) are formed along the circumferential direction of the inner peripheral surface of the inner cylinder 2 over the entire inner peripheral surface of the inner cylinder 2 to the hose h. The frictional resistance may be improved. However, if unnecessary, it is possible to carry out without forming such a stepped portion.

Further, as shown in FIG. 4, by pushing the middle cylinder 2 into the back (front opening 31 side) of the outer cylinder 3 (by moving the outer cylinder 3 further rearward with respect to the middle cylinder 2). The locked portion 34 gets over the maximum outer diameter portion of the outer peripheral surface (sub-tapered surface 20) of the middle cylinder 2 and enters the locking portion 24 adjacent to the maximum outer diameter portion. In this way, by locking the locked portion in the locking portion 24 of the middle cylinder 2, the outer cylinder 3 can no longer be returned to the middle cylinder 2, and the pushing state of the ball 4 by the tapered surface 30 is prevented. Can be maintained. Thus, the mounting of the hose fixing metal fitting 100 is completed.
In the movement of the outer cylinder 3 during the pressing of the inner cylinder 1 and the locking part 24 of the locked part 34, the outer cylinder 3 is rotated in the circumferential direction of the middle cylinder 2 (that is, by screwing). ), Similarly to the insertion of the middle cylinder 2 at the time of manufacture (the load is eased so as to rise obliquely on the slope), the pushing operation of the middle cylinder 2 can be performed smoothly. This point will be described in detail.
Since the balls 4... 4 can rotate in each direction while being pressed against the tapered surface 30 of the outer cylinder 3 at the time of the above-described screwing, following the rotation of the outer cylinder 3 in the circumferential direction. It can roll and can smoothly follow the surface of the tapered surface 30 in the circumferential direction. Furthermore, since the middle cylinder 2 can be rotated in the circumferential direction with respect to the inner cylinder 1 (by being formed separately), the above-described screwing can be performed more smoothly. Further, the balls 4... 4 can roll following the rotation of the inner cylinder 2 relative to the inner cylinder 1 depending on the degree of freedom of rotation, and can smoothly follow the outer peripheral surface of the inner cylinder 1 in the circumferential direction.
By such operations of the ball 4 and the middle cylinder 2, even a powerless person can smoothly fix the hose fixing metal fitting 100 to the surface of the hose h.

In the present embodiment, the diameter of the rear part of the middle cylinder 2 can also be reduced, but the ball 4 can be passed when inserted into the outer cylinder 3 or the locked part 34 is engaged with the locking part 24. When stopping, it is sufficient that the outer cylinder 3 can be slightly reduced in diameter to the extent that the outer cylinder 3 can get over the maximum outer diameter portion of the intermediate cylinder 2, and the purpose is to reduce the entire diameter in order to hold the hose h. The diameter is not reduced at a ratio as large as that of the inner cylinder 1. Therefore, such a reduction in the local diameter of the middle cylinder 2 does not force the middle cylinder 2 to change the thickness so as to affect the depth of the through-hole 26 that receives the ball 4.
However, as shown in FIG. 1 (D), by providing an interval between the outer peripheral surface of the inner cylinder 1 and the inner peripheral surface of the middle cylinder 2 so that the ball 4 does not enter the inner side of the middle cylinder 2, It is also possible to reduce the thickness of the minute tube 2 and to increase the reduction rate so that the above insertion and locking can be performed more smoothly.

In the embodiment shown in FIG. 1 to FIG. 4, the hose fixing metal fitting 100 once fixed to the hose h is in a fitted and killed state and cannot be easily removed.
The hose fixing metal fitting 100 shown in FIG. 5 enables such removal and facilitates reuse of the hose fixing metal fitting 100.
Hereinafter, the hose fixing metal fitting 100 shown in FIG. 5 will be described.
The locking part 24 of the middle cylinder 2 includes an exposed part 5 exposed to the outside from one end of the outer cylinder 3 in a state where the locked part 34 is locked. The exposed portion 5 is an extended portion formed behind the locking portion 24 at the rear portion of the middle cylinder 2. In this embodiment, the aforementioned notches 27... 27 are formed in front of the exposed portion 5 in the axial direction of the middle cylinder 2. By sandwiching the exposed portion 5 with pliers or a similar tool and applying a force f <b> 3, the outer diameter of the locking portion 24 can be reduced and the locked portion 35 can be pulled out of the locking portion 24. In this way, the fixing to the hose h can be released.
In the embodiment shown in FIG. 6, items not particularly mentioned are the same as those in the embodiment shown in FIGS.

  In each of the above-described embodiments, the through portions 26 are provided at four locations in the circumferential direction r of the middle cylinder 2, but there are five or more penetration portions 26 in the circumferential direction r of the middle tube 2 (the ball 4 also 5 or more) or 3 or less (3 or less balls 4). In the above-described embodiment, the middle cylinder 2 is provided with the penetrating portion 26 at two different positions in the axial direction, but the penetrating portion 26 is located at one location in the axial direction of the middle cylinder 2 (the ball 4 is 1 Even if it is provided in three or more places (three or more kinds of balls 4), it can be implemented. However, the arrangement of the balls 41 at two or more locations in the axial direction of the middle cylinder 2 is advantageous in that the outer circumference of the inner cylinder 1 can be pressed without deviation.

Further, in the above-described embodiment, the assembly direction of the middle cylinder 2 and the outer cylinder 3 at the time of manufacture is the same as the direction of the locking operation at the time of use. Is possible. For example, the inclination of the taper surface 30 and the subtaper 20 may be formed opposite to the above, and the outer cylinder 3 may be moved forward F with respect to the middle cylinder 2 when fixed to the hose h. (Not shown).
In each of the above-described embodiments, the tapered surface 30 is the entire inner peripheral surface of the outer cylinder 3, but the taper surface 30 may be formed only on a part of the inner peripheral surface. The same applies to the sub-tapered surface 20.

(A) is a partially cutaway exploded side view of a hose fixing bracket according to an embodiment of the present invention, (B) is a partially cutaway side view of the cutout, and (C) is a side view of the relevant portion. (D) is an XX schematic end view of (C). (A) is a partially cutaway side view showing the state during the assembly of the hose fixing bracket, (B) is a partially cutaway side view after completion of assembly, and (C) is a view of (A). It is a schematic sectional drawing which shows the method suitable for an assembly operation. (A) And (B) is a whole side view which shows the attachment method at the time of use of the said hose fixing metal fitting, respectively. It is a longitudinal cross-sectional view which shows the state which the installation operation | work shown in FIG. 3 was completed. It is a longitudinal cross-sectional view which shows other embodiment.

Explanation of symbols

1 Inner cylinder 2 Middle cylinder 3 Outer cylinder 4 Ball h Hose n Nipple

Claims (6)

A hose that is attached to the outer periphery of the hose end fitted to the outer periphery of the hose attachment port of equipment and connectors that handle fluid, and prevents the hose end from loosening from the hose attachment port In the fixing bracket,
An inner cylinder arranged on the outer periphery of the hose, an outer cylinder arranged on the outer side of the inner cylinder, at least one ball arranged between the inner cylinder and the outer cylinder, and an outer side of the inner cylinder A middle cylinder disposed inside the cylinder ,
The inner cylinder is provided with a notch that extends from the front to the rear, reducing the diameter of the entire area in the axial direction when a force is applied from the outside, and pressing the outer peripheral surface of the hose end with the entire inner peripheral surface. Is something that can be
The fixture has a tapered surface that comes into contact with the ball ,
The middle cylinder includes a penetrating portion that accommodates the ball, and the penetrating portion penetrates from the outer circumferential surface of the middle cylinder to the inner circumferential surface,
The ball received in the through portion can contact the outer peripheral surface of the inner cylinder through the through portion,
Characterized by moving the against-axis direction middle cylinder and outer cylinder, an inner circumferential surface of the outer cylinder, pushing the ball contacts the tapered surface, that is intended to press the outer peripheral surface of the inner cylinder at the ball Hose fixing bracket. The tapered surface is provided on the inner peripheral surface of the outer cylinder and gradually decreases the inner diameter toward either the front or rear in the axial direction of the outer cylinder.
2. The hose fixing bracket according to claim 1, wherein the inner diameter of the penetrating portion is larger than the outer diameter of the ball. The middle cylinder includes a locking part, and the outer cylinder includes a locked part,
When the outer cylinder is moved in the axial direction with respect to the middle cylinder, the ball is pressed by the taper surface and pushed into the penetration portion, and the outer cylinder is pressed with the ball. The outer cylinder cannot be moved backward with respect to the middle cylinder by locking the locked section with the locking section, and the pressed state of the ball by the tapered surface is maintained. The hose fixing bracket as described. The middle cylinder is inserted into the outer cylinder from one end of the outer cylinder, and the outer tapered surface has a secondary tapered surface that gradually reduces the outer diameter in the axial direction corresponding to the tapered surface of the outer cylinder. With
The penetrating part penetrates from the sub-tapered surface toward the inside of the middle cylinder,
The penetrating part has an inner diameter larger than the outer diameter of the ball, and the ball does not fall off from the penetrating part by contacting the outer peripheral surface of the inner cylinder, and can rotate in each direction within the penetrating part. And
The above-described locked portion is a small inner diameter portion that is adjacent to the maximum inner diameter portion of the tapered surface and has an inner diameter smaller than the maximum inner diameter portion of the tapered surface, and the above-described locking portion is located at the maximum outer diameter portion of the sub-taper surface. A small outer diameter portion that is smaller than the maximum outer diameter portion of the adjacent and sub-tapered surface,
By moving the outer cylinder in a direction in which the tapered surface approaches the secondary tapered surface with respect to the middle cylinder, the above-mentioned locked portion gets over the maximum outer diameter portion of the secondary tapered surface and enters the locking portion. The hose fixing bracket according to claim 3, wherein the locked portion is locked to the stop portion. The locking portion of the middle cylinder includes an exposed portion exposed to the outside from one end of the outer cylinder in the locked state, and at least the exposed portion is provided with a notch portion along the axial direction of the middle cylinder, and the outer peripheral surface. 5. The hose fixing bracket according to claim 4, wherein at least the diameter of the exposed portion is reduced by receiving the force to enable the retracted portion to be retracted from the locking portion. The ball includes at least two kinds of balls, a first sphere and a second sphere having a smaller diameter than the first sphere.
The middle cylinder is provided with at least two penetration parts of the first penetration part and the second penetration part at different positions in the axial direction as the penetration part.
The first penetrating portion receives the first sphere, and the second penetrating portion is located on the side where the diameter of the tapered surface of the outer cylinder is smaller than the first penetrating portion and receives the second sphere. The hose fixing bracket according to any one of claims 1 to 5, wherein

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