JPS6026880A - Ferrule for coupling hose and fitting method thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to bowse attachment couplings, and more particularly to deformable ferrules for use in hose connections.

Couplings that mate with flexible hoses typically include a male diaphragm section that is inserted into the end of the hose, and a ferrule that is coaxial with the stem. The ferrule can be mated to the male stem or later joined to the fiber stem during the mating process, requiring deformation of the ferrule. The hose end is received within an annular space formed between the male stem and the ferrule. The hose is compressed between the ferrule and the stem to hold the coupling to the hose end.

Attach the ferrule to the stem in advance (if the ferrule is attached, attach the end of the ferrule to the stem collar (= J) to form an annular hose connection space. It can also be configured to be attached to the collar of the C-sdem due to deformation.

Some known ferrules have a smooth hole that is deformed, for example by a ripple drawing operation, to form a plurality of annular ridges and grooves in the ferrule sidewall. A plurality of serrations or grooves are provided in the annular shape of the hose to improve grip of the end of the hose, which is sometimes deformed during assembly.

Some ferrules have circumferential, helical or longitudinal ribs on the inner surface of the ferrule to better cover the grip of the hose end. The ribs contact reinforcements in the hose to improve retention of the coupling. The ferrule transforms the known process C outline, such as recess, into a substantially cylindrical shape.

An example of a pre-cut type ferrule having a truncated conical shape with a constant wall thickness to facilitate insertion of the hose end before deformation is shown in US Pat. No. 3,530,900@.

During the joining process, the frusto-conical ferrule is approximately cylindrical and retains the hose end with a plurality of circumferential ribs and grooves.

An example of a later-attached ferrule is U.S. Patent No. 4305.
No. 608. The ferrule is provided with a plurality of longitudinal ribs so that when the ferrule is deformed into a substantially cylindrical shape, the ferrule penetrates the bow cover and bites into the hose reinforcing part. A portion of the rib deforms between the apertures and is pressed against the stem collar, securing the ferrule to the male stem.

Another example of a pre-attached (Puda type) ferrule is shown in U.S. Pat. Based on the difference between the pitch interval of the ripples of the aperture and the pitch interval of #1. The compression experienced by the hose gradually decreases.Providing a pressure reducing section reduces the local stress at the joined hose ends and improves the joint, but it also reduces the pitch of the ripples on the male stem. It is necessary to form the pressure reduction in the correct predetermined position relative to the pitch spacing.

While U.S. Pat. No. 3,530,900 depicts a preformed frusto-conical space containing the hose end, this patent and U.S. Pat. is circular. US 11 Special 7F 43 (LFI608 can be used for high pressure hoses because the ribs of the ferrule directly contact the reinforcement part of the bow.

The rod according to the present invention (a deformable rod used together with a stem for connecting hoses) has a sleeve-like body with a side end, a bow side end, and a sleeve-like body that bends over the side wall. The section decreases in thickness in the longitudinal direction of the sleeve toward the bosu end. In some cases, a plurality of ribs protrude from the inner surface of the sleeve to improve grip on the bow end. The ferrule deformed by squeezing or swaging has a hose end gripping surface in the shape of a truncated cone. The frusto-conical surface has the effect of progressively reducing the local tension response at the end of the hose.

Truncated circle 11
When deformed into an almost cylindrical shape, a truncated circle it is formed during the deformation process.
A shaped inner surface is formed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ferrule for a hose in which there is a controlled decrease in the compression value of the bowse between the restrictors in the direction from the inward end of the ferrule to the hose end.

Reference will now be made to illustrative embodiments and drawings for the purpose of clarifying objects and advantages of the invention.

The sleeve-like body 12 of the ferrule 10 of the present invention, shown in FIGS. 1-6, has a truncated end 14, a hose end 16, a generally cylindrical inner surface 18, and an outer surface bordering a frusto-conical surface 20.

A cylindrical surface 22 can also be provided on the outer surface. The side wall 24 formed by the inner surface 18 and the outer surface 20 decreases in thickness in the longitudinal direction of the body 12 toward the hose end 16. A plurality of circumferentially spaced inner surface ribs 26 are arranged longitudinally of the body and project from the inner surface. Rib 26 extends about the man portion of the body. Taper 28 ff on both ends of the rib
It may be 14J.

The male stem 30, which is assembled to the ferrule 10 in use, has a prong 31 at one end and a serrated stem 32 at the other end. The hose 34 for covering the ferrule includes a tube 3G, a reinforcing portion 38, and a cover 40 in the example shown in FIG. As shown in U.S. Pat. No. 4,305,608, ferrule 1
A locking collar 42 may be provided on the stem 32 to secure the ferrule to the stem 32. Insert the stem 32 into the bore of the bore and crimp or swage the ferrule. The hose is deformed as shown in FIG. 5.6 to reduce its diameter and fix the hose. As a result of this deformation, the outer surface i becomes a substantially cylindrical surface 44, and the inner surface becomes a substantially truncated inner It surface 46. Ribs. 2G is transformed from the shape of the cylindrical longitudinal element of FIG. 3 to the conical frusto-conical element of FIG.

The collar 42 forms a recess 48 in the rib, and a portion of the hose reinforcement 38 is forced into a portion of the rib by deformation of the ferrule. This is shown as section 50. The ribs grip the reinforcing portion, and the inner surface grips the small end of the ferrule, and the compression of the hose, that is, the drawing size, is gradually reduced, so that no localized high stress area is created at the end of the ferrule on the hose side. The amount of throttling required to create a usable coupling will vary depending on each hose and its application. It has been found that sufficient coupling is obtained when the semiconical angle A of the outer frustoconical surface is approximately 46. The outer cylindrical surface is provided with a retaining member that contacts and holds the first radially moving cylindrical surface of the known drawing machine to prevent slippage during the drawing operation.

Other embodiments of the ferrule of the present invention are shown in Figures 7 to 10. In this ferrule, the thickness of the side wall portion 24 decreases in the longitudinal direction of the ferrule toward the hose side end 1G. In other words, the outer surface is almost cylindrical with a narrowed ferrule.
The inner surface is almost truncated conical. The ferrule 52 shown in FIG.
It has a truncated conical inner surface 5G. Angles B and C are not equal angles.

A longitudinal rib 58 projects from the inner surface as an element of the frustoconical surface 5G. In use, the outer surface 54 is deformed into a roughly cylindrical shape, as shown in FIGS. This transformation makes angle C human.

Referring to FIG. 8, ferrule 60 has a generally cylindrical outer surface 62 and a frusto-conical inner surface 64, with a semicircular ft1t angle. During deformation, the ferrule becomes smaller in diameter, the outer surface remains approximately cylindrical, the inner surface retains its truncated shape, and the amount of compression that the hose end undergoes is progressively reduced. A longitudinal rib 66 extends along the inner surface of the frustoconical surface 64 .

FIG. 9 does not show the ferrule 68 without ribs. This ferrule is similar to the first embodiment shown in FIG. 3, but the outer surface 10 is truncated conical over its entire length, and the semi-conical angle to the conical surface is E. The inner surface 72 has a cylindrical shape.

This ferrule is deformed in the same manner as shown in FIGS. 5 and 6, and the outer surface 70
is generally cylindrical, and the inner surface 72 is generally frustoconical.

The ferrule 14 shown in FIG. 10 has a truncated conical outer surface 7G having a semiconical angle F and extends over the entire length of the ferrule, as in FIG. 9. The inner surface 78 is generally cylindrical and has a plurality of longitudinally spaced circumferential ribs 80.

The collar 82 extends behind the stem collar 42 when the ferrule 74 is deformed and removed. Similar to the ferrule described above, the ferrule was squeezed to avoid deformation.

At times, the outer surface 76 is generally cylindrical and the inner surface 78 is truncated. The circumferential rib 80 forms a holding portion in which the amount of compression decreases sequentially from the attachment end toward the hose side end. This holding part applies a large stress locally to the bow, but the stress in the hose gradually decreases, so that excessive stress is not generated at the end of the ferrule on the hose side.

The embodiments and drawings described above are illustrative and do not limit the invention.

4.Drawings (D fi!I!li l;r rJl
Figure 1 is a partially removed perspective view of a ferrule according to an embodiment of the present invention, Figure 2 is an end view taken along line 2-2 in Figure 1, and Figure 3 is a view taken along line 3-3 in Figure 2. 54 is a cross-sectional view showing the hose connection state before compression of the ferrule, Figure 5 is the same as Figure 4 - C.] Figure 6 is a modified version of Figure 5. Showing only the ferrule? j
tJi plane views, FIGS. 7, 8, 9, and 10 are sectional views showing other embodiments of the present invention.

(Explanation of symbols) 10.52, 60, 68, 74: Ferrule 12: Main body 14: Equivalent and q end 16: Hose side end 18.56, 64, 72.78:
Inner surface 20.54, 62.70.7G: External surface 22: Cylindrical outer surface 24: Side wall 26.5g, GG, 80: Rib 2
8: Taber section 30: j, It stem 34: Small space 38: Reinforcement section Patent applicant The Boots Shoulder Company (4 others) FIG, l FIG, 20 FIG, 7 FIG, 8 Hi FIG , 9FIG, 10

Claims (1)

[Scope of Claims] 1. A deformable ferrule for connecting a hose, which has a sleeve-shaped body having an outer surface, an inner surface, an axle side end, and a bow side end, and the thickness of the side wall portion of the sleeve-like body is reduced in the longitudinal direction of the main body toward the hose side end, and due to the deformation of the main body when the hose is connected, the outer surface becomes almost cylindrical, and the inner surface of the side wall becomes almost truncated. A plurality of substantially parallel, circumferentially spaced ribs extend from the inner surface of the main body and extend in the substantially longitudinal direction of the main body. A hose coupling ferrule characterized in that the distance in the circumferential direction between the ribs near the end on the mounting side decreases and becomes smaller than the space between the ribs near the end on the boss side, where f+[element direction and A≧]. 2. The ferrule according to claim 1, characterized in that a truncated conical number φ is provided on one surface of the main body. 3. A half of the truncated circular ♀ 11 shaped part. The ferrule according to claim 2, characterized in that the circular tit angle is about 4° or less. 4. A substantially truncated 111-shaped portion is provided on the outer surface of the main body.
The fan according to claim 1, characterized in that
rule. 5. A substantially truncated 111-shaped portion is provided on the inner surface of the main body ()
The ferrule according to claim 1, characterized in that: 6. An installation method in which a truncated circular IF surface portion is formed on the inner surface of the ferrule to gradually reduce the amount of compression during Bose coupling; a plurality of generally parallel circumferentially spaced ribs extending inwardly from the inner surface of the sleeve-like body and extending generally longitudinally of the body; Prepare a ferrule in which the thickness of the side wall between it and the inner surface decreases in the longitudinal direction toward the hose end of the main body: avoid deforming the ferrule, make the outer shape almost cylindrical, and adjust the thickness along the inner surface of the ferrule. It forms a truncated conical surface, and at the same time, the ribs are shaped like a truncated circular button!
Method.