JP6972893B2 - How to manufacture hose nipple and socket assembly - Google Patents

Description

The present invention relates to a method for producing a hose nipple and socket assembly products, more particularly, hose nipple and socket assembly that can be subjected to evenly plating on the outer surface and an inner surface of the socket of the assembly have been hose nipple it relates to the method of manufacturing the goods.

Rubber hoses and the like are used with hose fittings connected to the ends. The hose fitting is generally composed of a cylindrical nipple and a tubular socket. The engaging claw of the socket is engaged with the engaging portion formed on the outer peripheral surface of the nipple, and the tip of the nipple having a relatively small diameter is covered with the socket having a relatively large diameter. (See, for example, Patent Document 1). When connecting the end of the hose to the hose bracket, insert the tip of the nipple into the hose and crimp the socket from the outer peripheral side so that the end of the hose is sandwiched between the nipple and the socket. Is fixed.

The nipples and sockets are plated to prevent rust. By the way, when the assembly product in which the engaging claw of the socket is engaged with the engaging portion of the nipple is dipped in the plating solution, air is accumulated in the gap between the outer peripheral surface of the nipple and the inner peripheral surface of the socket, and the plating solution is discharged. Some parts may not adhere. If the assembly product is set to a predetermined posture in which air accumulation does not occur and the dipping work is performed, the problem of air accumulation can be improved, but it cannot be a fundamental solution. It is also difficult to maintain this assembled product in a predetermined posture. Therefore, there is room for improvement in evenly plating the outer surface of the nipple of the assembled product and the inner surface of the socket.

Japanese Unexamined Patent Publication No. 7-190270

An object of the present invention is to provide a method for manufacturing an assembled product of a hose nipple and a socket, which can be plated evenly on the outer surface of the assembled hose nipple and the inner surface of the socket.

In order to achieve the above object, in the method of manufacturing the assembly product of the hose nipple and the socket of the present invention, the engaging claw of the tubular socket is engaged with the engaging portion formed on the outer peripheral surface of the tubular hose nipple. Then, after dipping the assembly product in which the tip of the hose nipple having a relatively small diameter is covered with the socket having a relatively large diameter into the plating solution, the plating solution is dried to complete the plating process. In the method of manufacturing the assembly product of the hose nipple and the socket to be used, a through portion consisting of a through hole or a slit for communicating the outer peripheral side and the inner peripheral side of the socket is formed around the engaging claw of the socket. It is characterized by.

According to the present invention, a through portion formed of a through hole or a slit is formed around the engaging claw of the socket of the assembled product to communicate the outer peripheral side and the inner peripheral side of the socket. Therefore, when the assembly product is dipped in the plating solution, the air existing in the gap between the outer peripheral surface of the hose nipple and the inner peripheral surface of the socket can be discharged from the inner peripheral side of the socket to the outer peripheral side through the penetrating portion. can. As a result, it becomes difficult to generate a portion where the plating solution does not adhere to the outer surface of the hose nipple of the assembled product and the inner surface of the socket. In addition, when the assembly product is pulled up from the plating solution, excess plating solution existing in the gap between the outer peripheral surface of the hose nipple and the inner peripheral surface of the socket is removed from the inner peripheral side of the socket to the outer peripheral side through the penetrating portion. Can be discharged to. Therefore, it is advantageous to evenly plate the outer surface of the hose nipple of the assembled product and the inner surface of the socket.

It is explanatory drawing which illustrates the assembly product manufactured by this invention in the vertical sectional view. It is explanatory drawing which illustrates the assembly product of FIG. 1 from the side view. It is explanatory drawing which illustrates the assembly product of FIG. 1 in the cross-sectional view of AA. It is explanatory drawing which illustrates the assembly product of FIG. 1 in the state of being dipped in the plating liquid in the vertical cross-sectional view. It is explanatory drawing which illustrates the assembly product of FIG. 4 in the state of being pulled up from the plating liquid in the vertical sectional view. It is explanatory drawing which illustrates the state which the end part of the hose is inserted into the plated assembly product in the vertical cross-sectional view. It is explanatory drawing which shows the deformation example of the penetration part in the vertical cross-sectional view of an assembly product. It is explanatory drawing which illustrates the assembly product of FIG. 7 from the side view. It is explanatory drawing which illustrates the assembly product of FIG. 7 in the cross-sectional view of BB.

Hereinafter, a method for manufacturing an assembled product of a hose nipple and a socket of the present invention will be described based on an embodiment shown in the figure.

As illustrated in FIGS. 1 to 3, the hose nipple and socket assembly product 1 (hereinafter referred to as assembly product 1) manufactured by the present invention includes a cylindrical hose nipple 2 and a cylindrical socket 3. ing. On the outer peripheral surface of the hose nipple 2, a plurality of uneven portions are formed at the tip end portion in the tubular axis direction, and an engagement portion 2b is formed on the rear end portion side of the tip end portion 2a.

In this embodiment, the hose nipple 2 is a pipe bent at a position in the middle of the tubular axis direction, but it may be a straight pipe. Further, the length of the hose nipple 2 varies.

The socket 3 has an engaging claw 3a at one end in the tubular axis direction. The engaging claw 3a is engaged by being fitted into the concave engaging portion 2b, and the hose nipple 2 and the socket 3 are integrated. The engagement between the engaging portion 2b and the engaging claw 3a does not have to be strong, as long as the hose nipple 2 and the socket 3 do not separate from each other. Although the hose nipple 2 and the socket 3 are made of metal, the socket 3 is deformed along the outer peripheral surface of the hose 8 at the time of crimping, so that the specifications are such that the hose nipple 2 and the socket 3 are more easily plastically deformed than the hose nipple 2.

The tip portion 2a having a relatively small diameter of the hose nipple 2 is covered with a socket 3 having a relatively large diameter. That is, the tip of the assembly product 1 has a double pipe structure of the hose nipple 2 and the socket 3, and a gap S is formed between the outer peripheral surface of the hose nipple 2 and the inner peripheral surface of the socket 3. There is. The end of the hose 8 is sandwiched and fixed in this gap S.

A penetrating portion 4 for communicating the outer peripheral side and the inner peripheral side of the socket 3 is formed around the engaging claw 3a of the socket 3. In this embodiment, the through hole 4a is adopted as the through portion 4, but a slit 4b can also be adopted as described later. The range R in which the penetration portion 4 is formed is a range of a predetermined length from the position closest to the engaging claw 3a in the tubular axis direction of the socket 3 within the range in which the gap S is formed toward the open end of the socket 3. Is. This predetermined length (length of the range R) is set to, for example, 10% or more and 20% or less of the total length L of the socket 3. The total length L of the socket 3 varies depending on the specifications of the hose 8 to be connected, but for example, the total length L of the socket 3 used for connecting a hose having an inner diameter of 7 mm is 14 mm or more and 16 mm or less.

It is preferable to form 2 to 5 through portions 4 at equal intervals in the circumferential direction of the socket 2, and in this embodiment, four through holes 4a are formed at equal intervals in the circumferential direction. .. The outer diameter of the through hole 4a is, for example, 0.5 mm or more and 3 mm or less.

The penetration portion 4 can be formed by a drill or the like after the hose nipple 2 and the socket 3 are integrated or after the socket 3 is formed, but the penetration portion 4 is formed at the same time when the socket 3 is formed. It is good to do. When the socket 3 is formed by press working, if the penetrating portion 4 is formed during the pressing process, the manufacturing process does not increase because the penetrating portion 4 is formed.

Next, the procedure of the manufacturing method of the assembly product 1 according to the present invention will be described.

The engaging claw 3a of the socket 3 is engaged with the engaging portion 2b formed on the outer peripheral surface of the hose nipple 2 to form the assembly product 1 illustrated in FIG. Next, as illustrated in FIG. 4, the assembly product 1 is suspended by using a hanging tool 7 with the tip portion 2a facing downward, and is dipped in the plating solution 6 contained in the dip tank 5.

Since the through hole 4a is formed in the socket 3, when the assembly product 1 is dipped in the plating solution 6, the air a existing in the gap S between the outer peripheral surface of the hose nipple 2 and the inner peripheral surface of the socket 3 a. Is discharged from the inner peripheral side to the outer peripheral side of the socket 3 through the through hole 4a. Along with this, it becomes difficult to generate a portion where the plating solution 6 does not adhere to the outer surface of the hose nipple 2 and the inner surface of the socket 3. That is, it is advantageous to eliminate the uneven adhesion of the plating solution 6.

After dipping the assembly product 1 in the plating solution 6 for a predetermined time, the assembly product 1 is moved upward as illustrated in FIG. 5 and pulled up from the plating solution 6. Next, the plating solution 6 adhering to the assembly product 1 is dried by the drying step to complete the plating process.

When the assembly product 1 is pulled up from the plating solution 6, the excess plating solution 6 existing in the gap S between the outer peripheral surface of the hose nipple 2 and the inner peripheral surface of the socket 3 also passes through the through hole 4a to the inner circumference of the socket 3. It is discharged from the side to the outer peripheral side. Therefore, the outer surface of the hose nipple 2 of the assembly product 1 and the inner surface of the socket 3 can be plated evenly.

Further, since the gap S communicates with the outside air through the through hole 4a, the plating solution 6 adhering to the outer peripheral surface of the hose nipple 2 and the inner peripheral surface of the socket 3 tends to dry in the gap S. Along with this, the time of the drying process can be shortened, so that the productivity of the assembled product 1 can be improved.

By forming 2 to 5 through holes 4a at equal intervals in the circumferential direction of the socket 3, the plating solution 6 adheres regardless of the posture of the assembly product 1 when dipping into the plating solution 6. It becomes more and more advantageous to eliminate unevenness. Further, it is further advantageous to discharge the excess plating liquid 6 existing in the gap S from the inner peripheral side to the outer peripheral side of the socket 3 through the through hole 4a. Although it depends on the size of the through hole 4a, if six or more through holes 4a are formed, it becomes difficult to secure the strength required for the socket 3.

When the outer diameter of the through hole 4a is 0.5 mm or more and 3 mm or less, it is easy to discharge the air a existing in the gap S and the excess plating liquid 6 to the outer peripheral side of the socket 3 while ensuring the strength required for the socket 3. ..

After that, as illustrated in FIG. 6, the tip portion 2a of the hose nipple 2 is inserted into the end portion of the hose 8, and the end portion of the hose 8 is arranged in the gap S. According to the present invention, since the through hole 4a is formed around the engaging claw 3a (that is, the above-mentioned range R), the through hole 4a is normally inserted into the assembly product 1 at the end of the hose 8. It can function as a confirmation window to confirm whether or not it is installed. After arranging the hose 8 in the gap S, visually inspect the inner peripheral side of the socket 3 through the through hole 4a, and if the existence of the end portion of the hose 8 can be confirmed, the hose 8 is normally arranged in the gap S, and if not confirmed. It can be determined that the hose 8 is not normally arranged. This is advantageous in preventing poor connection between the assembly product 1 and the hose 8.

Next, the end of the hose 8 is sandwiched and fixed between the hose nipple 2 and the socket 3 by crimping the socket 3 from the outer peripheral side to plastically deform it. According to the present invention, the outer surface of the hose nipple 2 of the assembly product 1 and the inner surface of the socket 3 are evenly plated to prevent rusting of the assembly product 1 over a long period of time. can.

As illustrated in FIGS. 7 to 9, the slit 4b can also be adopted as the penetrating portion 4. The slit 4b extends in the tubular axis direction from the engaging claw 3a of the socket 3. In this embodiment, the slit 4b extends parallel to the cylinder axis direction, but it can also extend at an angle with respect to the cylinder axis direction.

The width of the slit 4b is preferably 0.5 mm or more and 3 mm or less. The extended length of the slit 4b is set so that the slit 4b falls within the above-mentioned range R. Even when the slit 4b is adopted, the same effect as when the through hole 4a is adopted can be obtained.

1 Assembly product 2 Hose nipple 2a Tip part 2b Engagement part 3 Socket 3a Engagement claw 4 Penetration part 4a Through hole 4b Slit 5 Dip tank 6 Plating liquid 7 Hanger 8 Hose

Claims (4)

By engaging the engaging claws of the tubular socket with the engaging portion formed on the outer peripheral surface of the tubular hose nipple, the tip of the hose nipple having a relatively small diameter has a relatively large diameter. In the method for manufacturing a hose nipple and a socket assembly product, which completes the plating process by dipping the assembly product covered with the socket into a plating solution and then drying the plating solution.
Manufacture of an assembly of a hose nipple and a socket, characterized in that a through hole or a slit is formed around the engaging claw of the socket to communicate the outer peripheral side and the inner peripheral side of the socket. Method. The method for manufacturing an assembly of a hose nipple and a socket according to claim 1, wherein the penetrating portions are spaced apart at equal intervals in the circumferential direction of the socket to form two to five. The method for manufacturing an assembly of a hose nipple and a socket according to claim 1 or 2, wherein the outer diameter of the through hole or the width of the slit is 0.5 mm or more and 3 mm or less. The method for manufacturing an assembly of a hose nipple and a socket according to any one of claims 1 to 3, wherein the penetrating portion is simultaneously formed when the socket is molded.

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