JPH08216048A - Manufacture of protector-covered hose and covering device therefor - Google Patents

Abstract

PURPOSE: To enable the operation of putting a protector over the outer periphery of a hose without causing bending failure and wounds of the hose by erecting a guide pin inside an inner cylinder used to determine the inserted position of the hose, the guide pin having an outside diameter almost equal to the bore of the hose and having a tapered upper end. CONSTITUTION: To manufacture a protector-covered hose, first a protector 2 is inserted into an upper cylinder 3. Next, the lower end of a hose 1 pointed in the vertical direction is placed on the upper end of the protector 2 and held in that state. Then compressed air is supplied toward the inner peripheral surface of the protector 2 via a compressed air supply opening 10 in a lower cylinder 5 and via an internal-wall opening 11 and the protector 2 is enlarged from inside, in which state the hose 1 is pushed into the protector 2. In this case, the hose 1 is pushed in while being fitted around a guide pin 6 having a tapered upper end and having an outside diameter almost equal to the bore of the hose, so as to prevent the hose 1 from being curved by pushing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a protector covering hose and a covering device thereof. More specifically, the present invention relates to a method for manufacturing a hose covered with a protector, for example, a protector such as a heat insulating sponge tube, and a covering device for the hose.

[0002]

2. Description of the Related Art High-pressure hoses such as brake hoses and power steering hoses, and low-pressure hoses such as water hoses and heater hoses are used in automobiles.

In these high-pressure hoses such as brake hoses and power steering hoses, hose joint fittings are fastened to both ends of the hose at the stage of hose manufacture.

These hoses essentially consist of flexible rubber hoses made of a rubber material, and are used in places such as a high-temperature engine room and around the feet which are subjected to severe vibration.

For this reason, these hoses are often covered with a protector, for example, a heat-insulating sponge tube, on the outer periphery of a portion which becomes a high temperature portion on the pipe or a portion which may be damaged by contact with other parts.

Here, the work of covering a high pressure hose such as a brake hose and a power steering hose with a protector, for example, a heat insulating sponge tube, is performed before fastening the hose joint fittings to both ends of the hose.

Now, the work of covering the outer periphery of a predetermined portion of these hoses with a protector, for example, a heat-insulating sponge tube is a troublesome work except that both are flexible tubes that are easily bent.

3 and 4 are cross-sectional explanatory views showing a conventional method of manufacturing a protector-covered hose.

In FIGS. 3 and 4, 1 is a hose, 2 is a protector, 3 is an upper cylinder, 4 is an inner cylinder, 5 is a lower cylinder, 10 is a compressed air supply port, and 11 is an inner wall opening.

The conventional protector covering device shown in FIGS. 3 and 4 comprises an upper cylinder 3 for accommodating the protector 2, an inner cylinder 4 for determining the insertion position of the hose 1, and a lower cylinder 5 for supplying compressed air. ing.

To cover the high pressure hose with the protector, first insert the protector 2 to be covered in the upper cylinder 3.

Next, the lower end of the hose 1 is aligned with the upper end of the protector 2 placed in the upper cylinder 3 and held in that state.

Next, when compressed air is supplied through the compressed air supply port 10 and the inner wall opening 11 of the lower cylinder 5, the protector 2 pushes and spreads from the inside, whereby the hose 1 placed on the upper end of the protector 2 is pushed. Push it in until it hits the inner bottom surface of the inner cylinder 4.

By performing such a series of operations, the protector 2 can be put on the outer periphery of the hose 1 at a predetermined position.

However, since the hose is inherently flexible and has a bending tendency, when the hose 1 is pushed in until its lower end hits the inner bottom surface of the inner cylinder 4, as shown in FIG. The lower end of the hose 1 comes into contact with the edge of the prepared hole and bends, and as a result, there are many problems in that the lower end of the hose 1 cannot be pushed until it hits the inner bottom surface of the inner cylinder 4. Such frequent occurrence of pushing trouble has been a major obstacle in improving the productivity of the protector covering hose, particularly in automating the protector covering work.

As prior arts for manufacturing other protector-covered hoses, JP-A-1-169197, JP-A-1-95008, and JP-A-1-2750 are known.
JP-A-5-196194, JP-B-5-5
No. 7087 is available.

However, even in these prior arts, the workability of the work of covering the outer periphery of the predetermined position of the hose with the heat insulating sponge tube cannot be remarkably solved.

[0018]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to solve the above-mentioned drawbacks of the prior art and to prevent the hose from being bent or being damaged. It is an object of the present invention to provide a method of manufacturing a protector covering hose and a covering device that can cover the outer circumference of the hose quickly and easily without covering the hose.

[0019]

The gist of the present invention lies in the following two points.

(1) A protector consisting of an upper cylinder into which a protector for covering the outer periphery of a predetermined position of the hose is inserted, an inner cylinder into which the hose can be inserted and positioned, and a lower cylinder capable of supplying compressed air into the inner cylinder. In the cover device,
A protector covering device, characterized in that a guide pin having an outer diameter substantially equal to the inner diameter of the hose and a tapered upper end is provided in the inner cylinder.

(2) A method for manufacturing a protector-covered hose, characterized in that, when the hose is pushed into the protector, the hose is pushed while fitting the guide pin.

[0022]

The protector cover hose manufacturing method and cover device according to the present invention include a guide pin having an inner cylinder having an outer diameter substantially equal to the inner diameter of the hose and a tapered upper end. As the hose is erected, the hose can be pushed while fitting the guide pin when pushing it into the protector. As a result, the hose that bends easily can be pushed in without bending the hose or contacting the inner cylinder wall. be able to. As a result, the quality and productivity of the protector-covered hose can be significantly improved.

[0023]

Next, an embodiment of a method of manufacturing a protector covering hose and a covering device thereof according to the present invention will be described.

FIG. 1 is a sectional explanatory view showing an embodiment of a method of manufacturing a protector cover hose and a cover device thereof according to the present invention.

In FIG. 1, 1 is a hose, 2 is a protector, 3 is an upper cylinder, 4 is an inner cylinder, 5 is a lower cylinder, 6 is a guide pin, 7
Is a locking nut, 10 is a compressed air supply port, and 11 is an inner wall opening.

That is, the protector covering device of one embodiment of the present invention supplies an upper cylinder 3 into which a protector 2 to be fitted around the outer periphery of a predetermined position of a hose 1 is inserted, an inner cylinder 4 which determines the insertion position of the hose 1, and compressed air Lower cylinder 5 and inner cylinder 4 for
The guide pin 6 is fixed to the center of the guide pin 6, and the lock nut 7 is screwed to prevent the guide pin 6 from loosening.

Here, the upper end of the guide pin 6 is tapered so that the hose 1 can be pushed in quickly and easily.

In this case, the guide pin 6 may be burned with a lubricating polymer substance having a good sliding property, such as a silicone resin paint, a fluororesin paint or a polyamide resin paint, or
Alternatively, a lubricating oil such as silicone oil, mineral oil, petrolatum or the like can be applied.

Next, a method of manufacturing the protector-covering hose according to one embodiment of the present invention will be described.

First, the protector 2 which covers the outer periphery of the hose 1 at a predetermined position is inserted into the upper cylinder 3.

Next, the vertical lower end of the hose 1 is placed on the upper end of the protector 2 inserted in the upper cylinder 3 and held as it is.

Next, when the lower end of the hose 1 is placed on the upper end of the protector 2 inserted in the upper cylinder 3,
Compressed air is supplied to the inner peripheral surface side of the protector 2 from a compressed air generator (not shown) through the compressed air supply port 10 and the inner wall opening 11 of the lower cylinder 5. The protector 2 is spread from the inside by this compressed air.

Next, the hose 1 is inserted while being pushed into the protector 2 which has been expanded from the inside in this way.

When the hose 1 is pushed in, the hose 1 is pushed in while being fitted into the guide pin 6 fixed to the center of the inner cylinder 4. As described above, if the hose 1 is pushed while being fitted into the guide pin 6 fixed to the center of the inner cylinder 4, the hose 1 is not pushed and bent, and the inner cylinder 4 is swiftly and surely.
Can be inserted up to the inner bottom surface of.

Here, since the upper end portion of the guide pin 6 is tapered, the hose 1 can be pushed in quickly and easily.

By repeating such a series of operations, the protector covering hose can be efficiently produced without bending or scratching, and as a result, the quality and productivity of the protector covering hose can be significantly improved. it can.

FIG. 2 is a sectional explanatory view showing another embodiment of the method of manufacturing the protector cover hose and the cover device of the present invention.

In FIG. 2, 1 is a hose, 2 is a protector, 3 is an upper cylinder, 4 is an inner cylinder, 5 a lower cylinder, 6 is a guide pin, 7
Is a locking nut, 8 is a spring, 9 is a photoelectric switch, 10 is a compressed air supply port, and 11 is an inner wall opening.

That is, in the apparatus of another embodiment, the inner cylinder 4 is supported by the spring 8 and the lower end of the hose 1 is fixed to the inner cylinder 4.
The inner cylinder 4 can also be lowered by further pushing it after pushing it to the inner bottom surface.

The photoelectric switch 9 is capable of detecting the lowered position of the inner cylinder 4 thus lowered, and the operator judges from the detection signal that the protector 2 has been put on the outer periphery of the hose 1 at a predetermined position. can do. Further, by utilizing the photoelectric switch 9 as described above, the work of covering the protector can be automated.

[0041]

EFFECTS OF THE INVENTION According to the method and apparatus for manufacturing a protector-covered hose of the present invention, the quality and productivity of the protector-covered hose can be significantly improved, and it is industrially useful.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing an embodiment of a method of manufacturing a protector cover hose and a cover device thereof according to the present invention.

FIG. 2 is a cross-sectional explanatory view showing another embodiment of the method for manufacturing the protector cover hose and the cover device according to the present invention.

FIG. 3 is an explanatory cross-sectional view illustrating a conventional method of manufacturing a protector-covered hose.

FIG. 4 is a cross-sectional explanatory view showing the occurrence of bending of the hose in the conventional method of manufacturing a protector-covered hose.

[Explanation of symbols]

 1 Hose 2 Protector 3 Upper cylinder 4 Inner cylinder 5 Lower cylinder 6 Guide pin 7 Locking nut 8 Spring 9 Photoelectric switch 10 Compressed air supply port 11 Inner wall opening

Claims (7)

[Claims] 1. A protector comprising an upper cylinder into which a protector for covering the outer periphery of a predetermined position of a hose is inserted, an inner cylinder into which the hose can be inserted and positioned, and a lower cylinder into which compressed air can be supplied into the inner cylinder. In the covering device, a protector covering device is characterized in that a guide pin having an outer diameter substantially equal to the inner diameter of the hose and a tapered upper end is provided upright in the inner cylinder. . 2. A lubricating polymer substance selected from silicone resin paints, fluororesin paints, and polyamide resin paints is baked on the outer periphery of the guide pin. Protector cover device. 3. The protector covering device according to claim 1, wherein a lubricating oil selected from silicon oil, mineral oil and vaseline is applied to the outer periphery of the guide pin. 4. A photoelectric switch is provided, which is supported by a spring and is capable of detecting the lowered position of the inner cylinder so that the lower end of the hose can be pushed further into the inner bottom surface of the inner cylinder. Item 7. The protector covering device according to item 1. 5. The protector is inserted into the upper cylinder, the lower end of the hose is placed on the upper end of the inserted protector, and then compressed air is supplied through the compressed air supply port of the lower cylinder to the inner peripheral surface side of the protector. In the method of manufacturing the protector cover hose, the protector cover hose is manufactured by pushing the protector cover hose into the protector expanded from the inner side by pushing the hose into the protector cover. A method of manufacturing a protector-covered hose, characterized in that when the hose is pushed in, the hose is pushed in while being fitted on the guide pin. 6. The guide pin is erected in the inner cylinder, has an outer diameter substantially equal to the inner diameter of the hose, and has a tapered upper end. Manufacturing method of protector cover hose. 7. The lubricating oil is dipped on the guide pin when the hose is fitted on the guide pin.
A method for manufacturing the described cover hose.