JPS5916625Y2 - Connection head structure of hose end - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in the connection head structure at the end of a relatively small diameter rubber or resin hose with a diameter of about 30 mm or less, which is installed in vehicles, mechanical equipment, and other various devices. .

As shown in FIG. 5, the conventional connection head structure of these hose ends is such that the end of the hose 11 is bent and bulged outward with the same wall thickness, and the end of the hose 11 is bent and bulged outward between the opposing circumferential wall surfaces 12° and 12 inside the bend. Gap 15
It was constructed with a bulging head 14 holding a holder, and its front surface was used as a pressing sheet surface 13 at the time of connection.

However, in such a structure, when tightening the connection,
As the bulging head is squeezed, it causes outward collapse and deformation, and the bulging head becomes extremely thin, making it impossible to tighten it sufficiently, which leads to leakage.

This tendency is particularly noticeable in soft, thin-walled hoses, and there has been a strong desire for improvement.

In addition, the conventional hose end connection head is tightened directly on the back of the bulging head by pressing the nut, which causes twisting in the lower part of the head neck, which causes the neck to tighten. The problem was that the lower part could crack and break.

The present invention effectively solves these problems with a simple structure.

The connecting head structure of the hose end according to the present invention is a state in which the inner peripheral wall surfaces of the hose wall body, which is bent outward in a bulging manner near the end of a rubber or resin hose, are brought into pressure contact with each other. A connecting bulging head is formed with the front surface as a pressing sheet surface, and a sleeve washer having a step-like enclosing wall portion with an enlarged diameter on the front side is fitted from the top of the bulging head to the rear head surface and near the bottom of the neck. It is characterized by the fact that it can be worn.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 is a relatively thin rubber or resin hose with an outer diameter of about 30 nm or less, and the vicinity of the connecting end of the hose 1 is located on the outside. The hose wall is bent into a bulging shape, and the opposing inner circumferential wall surfaces 2, 2 are in pressure contact with each other, and the front surface is the pressing sheet surface 3. A sleeve washer 8 having a stepped enclosing wall 8' with an enlarged diameter on the front side is fitted from the top 5 of the bulging head to the back head 6 and the area below the neck 7.

Incidentally, reference numeral 9 denotes a nut for tightening the connection head of the hose to the mating connection base (not shown).

In the example of FIG. 1, the pressing seat surface 3 of the connection head. is tapered toward the front end, and the back surface 6 of the bulging head is formed at right angles to the hose surface; however, the present invention is not limited to this; for example, as shown in FIGS. 2 and 3. One in which the head pressing sheet surface 3 is formed perpendicular to the axis of the hose, as shown in FIG. including, and furthermore,
The pressing sheet surface 3 of the connection head is not limited to the case where it is provided at the most distal end of the hose, but also includes those where it is located slightly behind the most distal end as shown in FIGS. 2 and 4.

In short, the bent inner peripheral walls 2, 2 of the bulging head 4, which is formed by bending the hose wall body outward, are in contact with each other, and the bulging head 4
Any other shape may be used as long as a sleeve washer 5 with an enlarged diameter step is fitted from the top 5 to the back surface 6 and near the bottom of the neck 7.

As described above, in the present invention, there is no gap between the curved opposing walls of the bulging head, and the sleeve washer is fitted into the sleeve washer which has a step-like enclosing wall with an enlarged diameter from the top of the hose connection head to the vicinity of the neck. This prevents the head from collapsing outward or deforming due to tightening, and enables sufficient tightening to reliably prevent leakage over a long period of time. As a result of the significant reduction in twisting of the lower part of the head and neck, the effect of eliminating cracks and damage in the lower part of the neck can be obtained.

[Brief explanation of the drawing]

1 to 4 are partial sectional views of a connecting head structure for a hose end according to an embodiment of the present invention, and FIG. 5 is a partial sectional view of a connecting head structure showing a conventional embodiment. 1...Hose, 3...Press sheet surface,
4...Bulging head, 8...Sleeve washer.

Claims (1)

[Scope of utility model registration request] A connection in which the front surface of a rubber or resin hose 1 is formed into a pressing sheet surface 3 by pressing the inner circumferential wall surfaces 2, 2 of the hose wall body which is bent toward the outside into a bulging shape and pressing against each other. A sleeve washer 8 is formed on the bulging head 4 and has a step-like enclosing wall 8 with an enlarged diameter on the front side from the top 5 of the bulging head 4 to the dorsal head surface 6 and the vicinity 7 below the neck. The connection head structure of the hose end is characterized by a