JPH09292077A - Intermediate molded hose fittings - Google Patents

Abstract

(57) [PROBLEMS] To provide an intermediate molded product for solving problems such as high cost, nipple collapse, and liquid leakage in the conventional manufacturing method. SOLUTION: At least a tubular portion 41 and a protruding portion 42 provided inside the tubular portion 41 are integrally formed by forging with the same material. Further, the screw protrusion 40 and the flange 35
And are integrally molded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate molded product for manufacturing a hose fitting.

[0002]

2. Description of the Related Art At the mounting end of an industrial hose, a hose fitting is used in consideration of detachability, leakage prevention and reliability. As shown in FIG. 30 (c), what is called a male fitting is a head portion 4 on which the male screw portion 2 and the collar portion 3 are formed, and a socket portion 5 connected from the head portion 4. , And a nipple portion 6 provided coaxially inside the socket portion 5. When the male fitting 1 is manufactured, as shown in FIG. 30 (a), the head portion 4 and the nipple portion 6 are integrally formed with the main body portion 7, and FIG.
The tube body 8 corresponding to the nipple portion 6 as shown in (1) is formed separately, and the tube body 8 is fitted into the hole 9 of the main body portion 7 to assemble them, and are integrated by brazing. As shown in FIG. 31C, the so-called eyeglass fitting includes an eyeglass portion 10 having an eyeglass hole 29, a neck portion 11 having a communication hole 30 communicating with the eyeglass hole 29, and a neck portion 11. And a nipple portion 13 inside thereof. Also when manufacturing the eyeglass fitting 14, the eyeglass portion 10, the neck portion 11, and the socket portion 1
2 and the main body portion 15 (FIG. 31 (a)) and the nipple portion 1
The tubular body 16 (FIG. 31 (a)) corresponding to 3 is separately molded, the tubular body 16 is fitted in the communication hole 30, and these are integrated by brazing. Further, what is called a flat metal fitting is, as shown in FIG. 32 (d), a connector portion 17 having a rectangular cross section and a socket portion 1 extending from a side surface thereof.
8 and a nipple portion 19, and the connector portion 17 has a female screw portion 20, a communication hole 22 for communicating the nipple hole 21 of the nipple portion 19 with the female screw portion 20, and an opening of the communication hole 22 to the screw portion 20. The formed seal part 23 is formed. When manufacturing the flat metal fitting 24, as shown in FIG. 32A, the female screw portion 20 and the communication hole 2 are provided.
2. A separate connector part 17 having a seal part 23 is molded, and a tube body 25 corresponding to the socket part 18 is molded as shown in FIG. 32 (b), and as shown in FIG. 32 (c). The tubular body 26 corresponding to the nipple portion 19 is molded, the tubular bodies 25 and 26 are fitted and assembled in the groove 27 and the fitting hole 28 of the connector portion 17, and they are integrated by brazing. .

[0003]

However, the above conventional manufacturing method has the following problems. That is, due to the high heat of brazing at the time of integration, the nipple portions 6, 1
When 3 and 19 are annealed, the material softens and the nipple is crushed at the time of caulking the hose. Forgetting the brazing material or dropping the brazing material prevents proper brazing, so liquid (oil) leaks from the fitting part. However, there is a problem in that the work process such as the fitting work and the brazing work becomes long, resulting in high cost. In particular, the above was remarkable in the flat metal fitting 24 having many parts.

In order to solve these problems, the main body side including the socket portions 5, 12, 18 and the nipple portions 6, 13, 19 are integrally formed by plastic working, and the steps of fitting and brazing are performed. However, there has been no optimum intermediate molded product that can be used in such a novel manufacturing method.

[0005]

In order to solve the above-mentioned problems, the present invention comprises at least a tubular portion and a protrusion provided inside the tubular portion which are integrally formed by forging with the same material. Further, the present invention is provided with a screw convex portion, a flange portion, a tubular portion integrally formed of the same material, and a protrusion portion provided inside the tubular portion. The screw protrusion may have a recess. Further, the present invention includes an eyeglass-equivalent portion integrally formed of the same material, a neck portion, a tubular portion, and a projection portion provided inside the tubular portion. The eyeglass-equivalent portion may be a spherical or circular unprocessed eyeglass portion having no eyeglass hole. Alternatively, it may be a processed and completed eyeglass portion having eyeglass holes. The spectacles equivalent part may have a pin. Further, the present invention comprises a connector portion integrally formed of the same material, a tubular portion, and a protrusion portion provided inside the tubular portion. The connector part may have a screw equivalent part. The screw-corresponding portion may have a female thread formed therein. The connector part may have a seal-corresponding part corresponding to the seal part.
The seal-corresponding portion may have a seal hole. The seal equivalent portion may correspond to a male seal portion. Alternatively, it may correspond to a female seal portion. The protrusion may have a non-through hole of a predetermined length. Alternatively, it may have a through hole. The protrusion may be as long as the tubular portion. Alternatively, it may be formed shorter than the tubular portion. Alternatively, it may be formed longer than the tubular portion.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, referring to FIG. 2, the structure of the male fitting 31 for a hose manufactured by the intermediate molded product of the present invention will be described. This hose male fitting 31 has a socket portion 32 and a nipple portion 33 located radially inward of the socket portion 32 on one end side, and a male screw portion 34 and a brim portion 3 on the other end side.
5 is a one-piece molded part. The socket portion 32 is
It is formed in a tubular shape having an outer diameter and a length that can be appropriately fitted to the outer periphery of the hose end. The nipple portion 33 is formed as a small-diameter pipe coaxial with the socket portion 32 and having the same length, and is integrally connected to a shaft wall portion 36 formed radially inward of the brim portion 35. A shaft hole (nipple hole) 37 of the nipple portion 33 penetrates the shaft wall portion 36, extends inside the male screw portion 34, and opens at a shaft end surface 38 thereof.

Next, the first embodiment of the present invention will be described with reference to the intermediate molded product 3 for manufacturing the mouth metal fitting 31 for a hose having the above-mentioned structure.
9 will be described. This intermediate molded product 39 has a male thread 3
4, and a screw protrusion 40 having a length and outer shape corresponding to 4,
It comprises a brim portion 35, a tubular portion 41 to be the socket portion 32, and a protrusion portion 42 provided inside the tubular portion 41. The protrusion 42 is a solid columnar body having a predetermined outer diameter d ₁ and a predetermined length l _{1 so as} to have a volume corresponding to the nipple portion 33. It is preferable that the outer diameter d ₁ is the same as the outer diameter of the nipple portion 33 because the burden of the subsequent process is small. The base end of the protrusion 42 is connected to and integrated with the partition wall portion 43 corresponding to the shaft wall portion 36. The intermediate molded product 39 is integrally formed by plastic working with the same material. For example, in the case of forming by cold forging, a carbon steel wire for cold heading (SWCH) or its equivalent is selected as a material, and usually annealed and lubricated so as to be easily processed. . Besides steel, aluminum, copper or alloys thereof can be used. Further, at the time of plastic working, a coil-shaped material is supplied and molded by a multi-stage part former, or a rod-shaped single piece is press-molded.

When manufacturing the hose fitting 31 using this intermediate molded product 39, first, annealing is performed. This is for facilitating the plastic working in the subsequent step, and the annealing conditions are adjusted to make the projection 42 as soft as possible. After the annealing step, the protrusion 42 is further plastically worked to form the nipple portion 33. In order to perform this plastic working, for example, the intermediate molded product 39 is fixed to a die, a guide holder equipped with a punch is inserted inside the tubular portion 41, and the punch is press-fitted into the protruding portion 42 to move backward. A small-diameter pipe can be extruded, that is, the nipple portion 3
3 shall be molded. The punch press-fitting may be performed in several steps such as two steps. Then, following the molding of the nipple portion 33, the shaft hole 37 is penetrated to the shaft end surface 38 of the screw convex portion 40 by punching. Note that the punching of the penetrating portion may be performed by machining. Next, a male screw is engraved on the threaded convex portion 40 by thread rolling with a rolling tap or the like. Furthermore, by machining, for example, using NC machine tools and automatic lathes,
This male screw portion 34 is finished. As a result, a male hose fitting 31 for a hose having a predetermined shape as shown in FIG. 2 is obtained.

Thus, the intermediate molded product 39 of the present invention is
Since it does not require fitting and brazing, and is most suitable for a manufacturing method of integral molding, the hardness of the nipple portion 33 does not decrease, and thus it is possible to prevent the nipple from collapsing at the time of crimping. Since there is no joint, there is no risk of liquid leakage. That is, quality and reliability are improved. And part of the manufacturing process can be omitted,
Cost reduction is achieved. Further, by manufacturing the shaft hole 37 by forging, the cutting process can be almost eliminated, and the generation of chips can be suppressed to the minimum. Further, in this case, the nipple portion 33 becomes hard by undergoing the plastic working of the backward extrusion, so that the collapse of the nipple can be further prevented. Further, since the socket portion 32 is not plastically worked after the annealing process for plastic working, the socket portion 32 is
Remains soft and can be easily attached to the hose. That is, the present invention exhibits good properties in all performance items, eliminates the drawbacks of the conventional production methods, and achieves an excellent production method with high versatility.

Next, another embodiment of the present invention will be described.
FIG. 3 shows a second embodiment of the present invention, and this intermediate molded product 44 has a recess 45 in which the screw projection 40 is formed from the shaft end surface 38 thereof. This recess 45 is
It has an inner diameter corresponding to the shaft hole 37, and its tip is stopped at a position in front of the partition wall portion 43. Other configurations are similar to those of the first embodiment. With this configuration,
Drilling is facilitated by plastic working in the subsequent process, and the working load is reduced. FIG. 4 shows a third embodiment of the present invention. This intermediate molded product 46 has a non-through hole 47 in which the projection 42 is formed from its end. The non-through hole 47 also has an inner diameter corresponding to the shaft hole 37, and the tip end thereof has a length that stops at a position in front of the partition wall portion 43, so that the processing load of the subsequent process can be reduced. FIG. 5 shows a fourth embodiment of the present invention. In this intermediate molded product 48, a concave portion 45 and a non-penetrating hole 47 are formed in a screw convex portion 40 and a projecting portion 42, respectively. Is. With this configuration, it is possible to easily perform the drilling by the plastic working in the subsequent process.

Next, FIG. 6 shows a fifth embodiment of the present invention. In this intermediate molded product 49, the outer diameter and length of the protrusion 50 are the outer diameter of the nipple portion 33 (hose holding portion). ) And the total length. This intermediate molded product 50
When the male fitting 31 is manufactured by the method, the shaft hole 37 is formed by making a hole in the protrusion 50 and the screw protrusion 40 with a blade tool such as a drill. Therefore, although the cutting process is necessary, the nipple portion 33 is
6 (partitioning wall portion 43) is integrally molded, so that a reliable male hose fitting 31 for a hose without liquid leakage can be obtained. FIG. 7 shows a sixth embodiment of the present invention. The intermediate molded product 51 has a shaft hole 37 in the screw convex portion 40 of the intermediate molded product 49 shown in the fifth embodiment.
By providing the concave portion 45 corresponding to, it is possible to reduce the burden of the drilling process by mechanical cutting. FIG.
Shows the seventh embodiment of the present invention. This intermediate molded product 52 is the intermediate molded product 5 of the sixth embodiment.
In addition to the above, the through hole 53 is formed in the protrusion 50. With this configuration, it is possible to more easily perform the punching in the post process.

Next, FIG. 9 shows an eighth embodiment of the present invention. This intermediate molded product 54 has a screw protrusion 40.
And the tubular portion 5 shorter than the brim portion 35 and the socket portion 32.
5 and a protrusion 56 having a length that protrudes inward from the tubular portion 55 are formed, and the partition wall portion 57 at the position of the brim portion 35 has a predetermined thickness t ₁ greater than that of the shaft wall portion 36. It is made thick. That is, when the nipple hole (shaft hole 37) is formed by rearward extrusion, the partition wall portion 57 is used as an extension margin, and the socket portion 32 is also formed by plastic working at the same time. Length of tubular portion 55 and protruding portion 56
The relationship with the length is selected depending on the degree of forming by plastic working. For example, if it is desired to process the socket portion 32 more in the later step, the tubular portion 55 may have a shorter length.

FIG. 10 and FIG. 11 show a ninth embodiment of the present invention. The intermediate molded product 61 is for manufacturing the integrally molded eyeglass fitting 70,
Eyeglass-equivalent portion 62 integrally formed of the same material, and neck portion 6
3, a tubular portion 65 corresponding to the socket portion 64, and a protruding portion 66 provided inside the tubular portion 65. The spectacles-corresponding portion 62 is in an unfinished state in which the spectacles holes 67 are not formed, and has a spherical or circular shape. Further, the communication hole 60 communicating with the eyeglass hole 67 is not formed in the neck portion 63. The protruding portion 66 has a predetermined outer diameter d ₁ that is a volume corresponding to the nipple portion 68.
And have a length l ₁ .

With this intermediate molded product 61, eyeglass fittings 70
At the time of manufacturing, as in the previous embodiment, the projection 66 is perforated by cold forging (backward extrusion) to form the nipple portion 68 and the nipple hole 69. Further, the communication hole 60 and the eyeglass hole 67 are formed by punching (pressing) or mechanical processing such as drilling. With this, the spectacle metal fitting 70 integrally formed as shown in FIG.
Is obtained. That is, it is possible to manufacture the spectacles fitting 70 that is low in cost and highly reliable.

FIG. 12 shows a tenth embodiment of the present invention. This intermediate molded product 71 has a protrusion 66 and a nipple hole 69 in the intermediate molded product 61 of the ninth embodiment. A corresponding short unpenetrated hole 72 is formed. In addition, a spectacle hole 67 is formed in the spectacles equivalent portion 62 by pressing or machining. With this configuration, the nipple hole 69 can be easily molded. FIG. 13 shows an eleventh embodiment of the present invention. This intermediate molded product 73 has an eyeglass hole 67 in the eyeglass equivalent part 62,
Through holes 59 corresponding to the communication holes 60 are formed in the neck portion 63, respectively. The through hole 59 extends to the end surface of the protrusion 74 and substantially forms a part of the nipple hole 69. The partition wall portion 75 is the shaft wall portion 7.
6 has a predetermined thickness t ₂ larger than 6, the length l ₂ of the tubular portion 77 is shorter than the length of the socket portion 64, and the length of the protrusion 74 is shorter than the length of the nipple portion l ₃ . Has become. That is, the socket portion 64 and the nipple portion 68 are completed by forging with the partition wall portion 75 as an extension margin. In the eleventh embodiment, the protrusion 7
Although 4 is shorter than the tubular portion 77, it may be reversed (l ₂ <l ₃ ), and these hardnesses differ depending on the degree of processing in the subsequent step. FIG. 14 shows a twelfth embodiment of the present invention. In this intermediate molded product 78, the tubular portion 65 has a length equal to that of the socket portion 64, but the inner portion The length of the protrusion 79 with the through hole 59 is shorter than the length of the nipple portion 68. That is, only the nipple portion 64 is finished by plastic working.

Next, FIG. 15 shows a thirteenth embodiment of the present invention. This intermediate molded product 80 has a spectacle hole 67.
An eyeglasses equivalent portion 62 which is an unfinished eyeglasses portion, a neck portion 63 which does not have the communication hole 60, a tubular portion 65 which corresponds to the socket portion 64, and a length and outer diameter equal to the length and outer diameter of the nipple portion 68. It has a diameter projection 81. That is, the nipple hole 69 and the communication hole 60 are formed by machining such as a drill. With this configuration, the cutting process is left, but since the nipple portion 68 is an integral body that does not require fitting and brazing, a highly reliable eyeglass fitting 70 can be obtained. FIG. 16 shows a fourteenth embodiment of the present invention. In this intermediate molded product 82, a pin 83 is integrally molded in a completed glasses-equivalent portion 62 having an eyeglass hole 67. is there. FIG. 17 shows a fifteenth embodiment of the present invention. This intermediate molded product 84 includes an eyeglass equivalent portion 62 having eyeglass holes 67 in a completed state and a communication hole 6
It has a neck portion 63 in which 0 is not shown, a tubular portion 65 corresponding to the socket portion 64, and a protrusion 81 having a length equal to that of the nipple portion 68. The protrusion 81 has a length equal to that of the nipple hole 69. Of the unpenetrated holes 85 are formed. That is, the communication hole 60 can be easily formed by punching or drilling.

18 and 19 show a sixteenth embodiment of the present invention. This intermediate molded product 91 is for manufacturing an integrally molded flat metal fitting 92 for a hose, and includes a connector portion 93 integrally molded by forging with the same material, and a tubular portion 95 corresponding to a socket portion 94. , And a protruding portion 96 provided inside thereof. The connector portion 93 has a rectangular cross section, and has a concave screw-corresponding portion 98 corresponding to the female screw portion 97 and a screw-corresponding portion 9 on one side.
A column-shaped seal-corresponding portion 100 corresponding to the seal portion 99 is formed on the bottom surface side of the roller 8. The tubular portion 95 and the protruding portion 96 are the screw-corresponding portion 9 of the connector portion 93.
8 is integrally formed on the other side surface adjacent to the surface 8. The protruding portion 96 is formed with a predetermined outer diameter and length so as to have a volume corresponding to the nipple portion 101.

A flat metal fitting 92 is formed by the intermediate molded product 91.
When molding, use the rear extrusion to
101 and its nipple hole 102 are formed, and a female thread portion 97 is formed on the thread-equivalent portion 98 by rolling or the like, and the seal-equivalent portion 100 is formed into a tapered shape by cutting or forging to form a male seal portion. 99. Then, inside the connector 93, a communication hole 10 is formed by machining at a right angle.
3 to form the nipple hole 102 and the seal hole of the seal portion 99.
Communicate with 104. As a result, the integrally molded flat metal fitting 92 as shown in FIG. 19 can be obtained, and cost reduction and reliability improvement are achieved.

FIG. 20 shows a seventeenth embodiment of the present invention. This intermediate molded product 105 has a seal-corresponding portion 106.
As a result, the completed shape of the male seal portion 99 formed in a truncated cone shape is provided. The other structure is similar to that of the sixteenth embodiment, and therefore the illustration is omitted. With this configuration, it is possible to reduce the processing load on the seal portion 99 in the subsequent process. FIG. 21 shows an eighteenth embodiment of the present invention. This intermediate molded product 107
Is a female-shaped seal portion 108 having a truncated cone shape on the bottom surface of the screw-corresponding portion 98.
Further, the intermediate molded product 10 of the nineteenth embodiment shown in FIG.
9 is a female type seal part in the subsequent process, which does not have a seal equivalent part
It is for molding 108. In the intermediate molded product 110 according to the twentieth embodiment shown in FIG. 23, an unpenetrated hole 111 to be the seal hole 104 is formed in a frustoconical seal-corresponding portion 106 corresponding to the male seal portion 99. That is
It is possible to reduce the processing load of the communication hole 103 in the subsequent process. FIG. 24 shows that in the intermediate molded product 110 according to the twentieth embodiment, a female screw portion 97 is further provided in the screw corresponding portion 98.
The intermediate molded product 11 according to the twenty-first embodiment in which
2 is shown. With this configuration, the molding of the female screw portion 97 and the seal portion 99 in the subsequent process can be omitted, and the processing load on the communication hole 103 can be reduced.

Next, FIG. 25 shows a twenty-second embodiment of the present invention. This intermediate molded product 113 has a protrusion 9
6, a short non-through hole 114 corresponding to the nipple hole 102 is formed. That is, it is possible to easily perform the punching by the backward extrusion in the post process. Although detailed illustration of the connector portion 93 is omitted, it is not shown in FIG.
Any of the connector parts 93 shown in FIGS. 24 to 24 can be combined with this. FIG. 26 shows a twenty-third embodiment of the present invention, which is an intermediate molded product 115.
Is a protrusion 116 having an unpenetrated hole 117 having the same length as the nipple hole 102. With this configuration, only the communication hole 103 will be drilled in the subsequent process. FIG. 2
7 shows a twenty-fourth embodiment of the present invention,
The intermediate molded product 118 includes a tubular portion 119 shorter than the socket portion 94 and a nipple portion 101 longer than the tubular portion 119.
Corresponding to the projection 120 of the volume and the connector 93
The thick portion 121 bulged from the other side surface by a predetermined thickness t _3.
The thick portion 121 serves as an extension margin when the socket portion 94 is completed by forging.

Next, referring to FIGS. 28 and 29, an intermediate molded product 132 for manufacturing the female mouthpiece fitting 131 for a hose according to the twenty-fifth embodiment of the present invention will be described. In the integrally formed female fitting 131, the head 133 has a female screw part inward.
The nipple hole 140 of the inner nipple portion 139 of the socket portion 138 penetrates into the female screw portion 134, and the seal portion 135 and the seal portion 135 are provided with the brim portion 136 and the groove portion 137. It has a seal hole 141.

As shown in FIG. 28, the female fitting 13
The intermediate molded product 132 for manufacturing 1 has a concave portion 143 corresponding to the female screw portion 134 formed in the main body portion 142 having the brim portion 136, and a frustoconical seal-corresponding portion 144 formed on the bottom surface side thereof. There is. And a tubular part corresponding to the socket part 138.
145 and a protrusion 146 of a volume corresponding to the nipple portion 139 inside thereof are provided. Therefore, the protrusion 14
6 is forged (backward extruded) to form the nipple portion 139 and its nipple hole 140, and punched with a punch or cut with a drill to form a seal hole 141.
Then, the concave portion 143 is further rolled to form the female screw portion 134, and the groove portion 137 is formed by machining or the like. With this, the cost is low and the highly reliable female fitting 131 for hose can be manufactured.

The female mouthpiece 131 as shown in FIG.
As an intermediate molded product for manufacturing the same, various shapes can be combined like the intermediate molded products for the male opening fitting 31, the eyeglass fitting 70, and the flat fitting 92, which is taken into consideration in the subsequent process. Can be selected as appropriate.

[0025]

In summary, according to the present invention, it is possible to realize a manufacturing method which does not require fitting and brazing, can prevent the nipple from being crushed at the time of crimping, and at the same time, there is no risk of liquid leakage and the quality can be improved. It has an excellent effect that improvement and reliability are achieved. Further, since the manufacturing process can be partially omitted, cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a first embodiment of the present invention.

FIG. 2 is a side sectional view showing a male fitting for a hose manufactured by the intermediate molded product of FIG.

FIG. 3 is a side sectional view showing a second embodiment of the present invention.

FIG. 4 is a side sectional view showing a third embodiment of the present invention.

FIG. 5 is a side sectional view showing a fourth embodiment of the present invention.

FIG. 6 is a side sectional view showing a fifth embodiment of the present invention.

FIG. 7 is a side sectional view showing a sixth embodiment of the present invention.

FIG. 8 is a side sectional view showing a seventh embodiment of the present invention.

FIG. 9 is a side sectional view showing an eighth embodiment of the present invention.

FIG. 10 is a side sectional view showing a ninth embodiment of the present invention.

11 is a side sectional view showing an eyeglass fitting for a hose manufactured by the intermediate molded product of FIG.

FIG. 12 is a side sectional view showing a tenth embodiment of the present invention.

FIG. 13 is a side sectional view showing an eleventh embodiment of the present invention.

FIG. 14 is a side sectional view showing a twelfth embodiment of the present invention.

FIG. 15 is a side sectional view showing a thirteenth embodiment of the present invention.

FIG. 16 is a side sectional view showing a fourteenth embodiment of the present invention.

FIG. 17 is a side sectional view showing a fifteenth embodiment of the present invention.

FIG. 18 is a side sectional view showing a sixteenth embodiment of the present invention.

19 is a side sectional view showing a flat metal fitting for a hose manufactured by the intermediate molded product of FIG.

FIG. 20 is a side sectional view showing a main part of a seventeenth embodiment of the invention.

FIG. 21 is a side sectional view showing a main part of an eighteenth embodiment of the invention.

FIG. 22 is a side sectional view showing a main part of a nineteenth embodiment of the present invention.

FIG. 23 is a side sectional view showing a main part of a twentieth embodiment of the present invention.

FIG. 24 is a side sectional view showing a main part of a twenty-first embodiment of the present invention.

FIG. 25 is a side sectional view showing a main part of a twenty second embodiment of the present invention.

FIG. 26 is a side sectional view showing a main part of a twenty third embodiment of the present invention.

FIG. 27 is a side sectional view showing a main part of a twenty-fourth embodiment of the present invention.

FIG. 28 is a side sectional view showing a twenty-fifth embodiment of the present invention.

29 is a side sectional view showing a female mouth fitting for a hose manufactured by the intermediate molded product of FIG. 28. FIG.

FIG. 30 is a side sectional view showing a conventional male fitting for a hose and an intermediate molded product thereof.

FIG. 31 is a side sectional view showing a conventional hose eyeglass fitting and an intermediate molded product thereof.

FIG. 32 is a side sectional view showing a conventional flat metal fitting for hose and an intermediate molded product thereof.

[Explanation of symbols]

 31 Male fitting for hose (metal fitting for hose) 32, 64, 94, 138 Socket part 33, 68, 101, 139 Nipple part 34 Male screw part 35, 136 Flange part 37 Shaft hole 39, 61, 91, 132 Intermediate molded product 40 Screw projections 41, 65, 95, 145 Tubular parts 42, 66, 96, 146 Protrusions 45 Recesses 47, 72 Non-through holes 59 Through holes 60 Communication holes 62 Glasses equivalent parts (glasses part) 63 Neck 67 Glasses holes 69,102,140 Nipple hole (shaft hole) 70 Hose eyeglass fittings (hose fittings) 83 pins 92 Hose flat fittings (hose fittings) 93 Connector part 97,134 Female thread part 98 Screw equivalent part 99,135 Seal Part (male type) 100 Seal equivalent part 103 Communication hole 104, 141 Seal hole 108 Seal part (female type) 131 Female fitting for hose (metal fitting for hose)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideki Hagiwara Hideki Hagiwara 3-1-1 Sukegawa-cho, Hitachi City, Ibaraki Hitachi Cable Company, Ltd. (72) Inventor Katsuhiro Aoyagi 3-1-1 Sukegawa-cho, Hitachi, Ibaraki No. 1 in the electric wire factory of Hitachi Cable, Ltd.

Claims (19)

[Claims] 1. An intermediate molded product of a hose fitting, characterized in that at least a tubular portion and a projection provided inside the tubular portion are integrally formed by forging with the same material. 2. An intermediate molding of a metal fitting for a hose, comprising: a screw convex portion integrally formed of the same material, a brim portion, a tubular portion, and a projection portion provided inside the tubular portion. Goods. 3. The intermediate molded product of the hose fitting according to claim 2, wherein the screw projection has a recess. 4. An intermediate molded product of a metal fitting for a hose, comprising an eyeglass-equivalent portion integrally formed from the same material, a neck portion, a tubular portion, and a protrusion provided inside the tubular portion. 5. The intermediate molded product of the hose fitting according to claim 4, wherein the eyeglass-equivalent portion is a spherical or circular unprocessed eyeglass portion having no eyeglass hole. 6. The intermediate molded product of a hose fitting according to claim 4, wherein the eyeglass-equivalent portion is a processed eyeglass portion having eyeglass holes. 7. The intermediate molded product of the hose fitting according to claim 4, wherein the eyeglass-equivalent portion has a pin. 8. An intermediate molded product of a metal fitting for a hose, comprising a connector part integrally formed of the same material, a tubular part, and a protrusion provided inside the tubular part. 9. The intermediate molded product of the hose fitting according to claim 8, wherein the connector portion has a portion corresponding to a screw. 10. The intermediate molded product of the metal fitting for a hose according to claim 9, wherein the screw-corresponding portion is formed with a female screw. 11. The intermediate molded product of the metal fitting for a hose according to claim 8, wherein the connector portion has a seal-corresponding portion corresponding to the seal portion. 12. The intermediate molded product of the hose fitting according to claim 11, wherein the seal-corresponding portion has a seal hole. 13. The intermediate molded product of the metal fitting for a hose according to claim 11, wherein the seal-corresponding part corresponds to a male seal part. 14. The intermediate molded article of the hose fitting according to claim 11, wherein the seal-corresponding portion corresponds to a female-type seal portion. 15. The intermediate molded product of the hose fitting according to claim 1, wherein the protrusion has a non-through hole having a predetermined length. 16. The intermediate molded product of the metal fitting for a hose according to claim 1, wherein the protrusion has a through hole. 17. The intermediate molded product of the hose fitting according to claim 1, wherein the protrusion has the same length as the tubular portion. 18. The intermediate molded product of the hose fitting according to claim 1, wherein the protrusion is formed shorter than the tubular portion. 19. The intermediate molded article of the hose fitting according to claim 1, wherein the protrusion is formed longer than the tubular portion.