JPH0749196Y2 - Fitting for preventing deformation of hose fixing cylinder - Google Patents

Description

[Detailed Description of the Invention] "Industrial field of application" The present invention is designed to prevent deformation of press-fitting cylinders due to pressure when the snap-fastening cylinders such as bases and joints are attached to the ends of various high pressure hoses by caulking. The present invention relates to a fitting tool for preventing deformation of a hose fastening cylinder, which is used by being fitted into the fastening cylinder.

"Prior Art" Conventionally, this type of fitting tool is disclosed in, for example, Kaikaihei 1-97873.
It is disclosed in the publication.

In the above-mentioned publication, therefore, there are a medium type insertable into the fastening cylinder of the joint whose outer diameter can be scaled up and down, and a split die which presses the caulking cylinder fitted on the outer side of the fastening cylinder from above and below. Although a hose fastening cylinder die characterized by being provided is described, the middle die as a fitting tool is basically
A tapered barrel having a female thread in the center, an adjusting screw rod having an external thread to be screwed with the tapered barrel at the inner end and one knob at the outer end, and a loose fit with the adjusting screw rod, and
It is composed of a tubular body having several split grooves on the outer circumference and one tapered hole on the outer circumference.

In the above structure, when the adjusting screw rod is rotated, the tapered cylinder is moved back and forth, and as a result, each divided piece of the cylindrical body is expanded or contracted.

However, the above structure has the following drawbacks.

Since each base of each divided piece of the tubular body is continuously connected to the stopper portion of the tubular body, each divided piece does not expand or contract to a perfect circle even when the tapered tube moves back and forth. .

Therefore, if you pressurize the caulking cylinder that fits over the hose,
The influence of pressurization may occur on a part of the fastening tube fitted into the end of the hose.

Due to the above, the medium size can be used only for a hose having a predetermined diameter.

The taper tube is moved back and forth by turning the adjusting screw rod, but this turning operation is not easy.

"Problems to be solved by the invention" In view of the above-mentioned conventional drawbacks, the present invention does not substantially deform the fastening cylinder at the time of crimping, and even if the diameter of the fastening cylinder is different. A fitting for preventing deformation of a hose retaining cylinder that can be used, is easy to assemble and disassemble, and additionally allows a plurality of arcuate expansion / contraction pieces to be joined to a rod-shaped body to be easily stretched or contracted. To get the ingredients.

[Means for Solving the Problems] A deformation preventing fitting of a hose fastening cylinder of the present invention is a rod-shaped body having a male threaded portion and an outer diameter-enlarged portion continuous with the male threaded portion, and the rod-shaped body. A flange member that is loosely fitted and has a plurality of engaging portions in the cylindrical portion, and a plurality of arc-shaped expansion / contraction pieces that have engaged portions that engage with the engaging portions and that are joined to the outer peripheral surface of the rod-shaped body. ,
A ring-shaped elastic member mounted in the circumferential groove of each arc-shaped expansion / contraction piece so that these arc-shaped expansion / contraction pieces can be attached to the bar-shaped body, and the male-threaded portion of the bar-shaped body is screwed to move the bar-shaped body back and forth. It is characterized in that it comprises an operation knob for expanding or contracting each arc-shaped expansion / contraction piece in a perfect circular state by a motion.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In the embodiment shown in FIGS. 1 to 7, 1 is a bat-shaped rod-shaped body. A male thread portion 2 having a required length is formed on the small diameter portion side of the rod-shaped body 1 which is continuous with the outer diameter enlarged portion 1a. The rod-shaped body 1 serves as a core body of the fitting tool X.

Reference numeral 3 is a flange member that is loosely fitted to the small diameter portion side of the rod-shaped body 1. A fitting hole 4 is formed at the center of the collar member 3,
Is a collar portion 5 and a cylindrical portion 6 formed on one side surface of the collar portion 5.
In this embodiment, four engaging pins 7 are formed on the outer peripheral surface of the cylindrical portion 6 so as to project in a cross shape.

Reference numeral 8 denotes a plurality of arc-shaped expansion / contraction pieces attached to the outer peripheral portion of the rod-shaped body 1. This arc-shaped expansion / contraction piece 8 is divided into four in this embodiment, and when attached to the outer peripheral portion of the rod-shaped body 1, each forms a tubular body as a whole. Then, in the divided cylindrical body 8, the rod-shaped body 1 whose large-diameter portion side expands outwardly moves back and forth in the axial direction, and as a result, a perfect circle is always maintained even if the outer diameter expands or contracts. Has been formed. The arc-shaped expansion / contraction piece 8 will be described in more detail. Reference numeral 9 is a sliding contact surface that is in sliding contact with the outer expanded diameter portion 1a of the rod-shaped body 1, and 10 is a hose 11 for high pressure or the like as shown in FIG.
Of the fitting fitted to the end of the abutting surface that comes into contact with the inner peripheral surface 12a of the fastening cylinder 12 such as a joint, 13 is formed with a required interval on the abutting surface 10, in the present embodiment. The three peripheral grooves 14 are notched at the end of the arc-shaped expansion / contraction piece 8 on the thickness side, and the flange member 3 is formed.
The fitting surface that fits the outer peripheral surface of the cylindrical portion 6 of
It is an engagement hole as an engaged portion which is formed at one end of the arc-shaped expansion / contraction piece 8 having 14 and engages with the engagement pin 7 of the collar member 3.

Reference numeral 16 is an operation knob having an X screw portion 17 that is screwed with the male screw portion 2 of the rod-shaped body 1. In the present embodiment, the operation knob 16 is formed in a size that can be grasped with one hand, and the entire outer peripheral portion is knurled.

Reference numeral 18 denotes a ring-shaped elastic member which is mounted in each of the circumferential grooves 13 of the rod-shaped body 1 in order to attach the arc-shaped expansion / contraction pieces 8 to the rod-shaped body 1.

[Operation] The operation of the present invention will be described with reference to FIGS. 6 and 7.

First, when the fitting tool X is fitted into the fastening tube 12 fitted to the end of the hose 11, the outer diameter of each arcuate expansion / contraction piece 8 is reduced as shown in FIG. At this time, operate operation knob 16 with arrow A
When pushed in the same direction, the rod-shaped body 1 moves in the same direction as the operation knob 16 at the same time. As a result, each arcuate expansion / contraction piece 8 contracts in the radial direction while sliding on the outer peripheral surface of the rod-shaped body 1 by the spring force of each elastic member 18.

Next, when the respective arcuate expansion / contraction pieces 8 are to be brought into close contact with or closely contact with the inner peripheral surface 12a of the fastening cylinder 12, first, as shown in FIG. 7, the operation knob is pulled in the direction of arrow B. Then, the outer diameter of each arcuate expansion / contraction piece 8 expands against the spring force of each elastic member 18.

When the caulking cylinder 20 that is an outer cylinder is pressed against the end of the hose 11, the operation knob 16 is rotated in one direction so that the end surface of the operation knob 16 is brought into contact with the outer wall surface of the flange portion 5 of the flange member 3 to form a rod shape. Prevent body 1 from sliding due to pressure.

"Effects of the Invention" As is clear from the above description, the invention has the following effects.

(1) Since the collar member 3 and the plurality of divided arc-shaped expansion / contraction pieces are separate bodies, when the rod-shaped body is moved back and forth, each arc-shaped expansion / contraction piece expands or contracts in a perfect circle.

Therefore, when the outer diameter of each arcuate expansion / contraction piece is expanded, the contact surfaces thereof are in close contact with the inner peripheral surface of the fastening cylinder as a whole,
When the outer diameter is reduced, a sufficient space is created between each arcuate expansion / contraction piece and the fastening tube, so that the caulking post-fitting tool can be easily pulled out from the fastening tube.

(2) The rod-like body moves back and forth simply by pushing or pulling the operation knob back and forth. Therefore, each arcuate expansion / contraction piece can be easily expanded or contracted.

(3) Since each arc-shaped expansion / contraction piece expands or contracts in a perfect circle, it can be used even if the diameter of the fastening tube is different.

(4) Since the flange member is formed with a plurality of engaging portions, while each arcuate expansion / contraction piece is provided with the engaged portion that engages with the engaging portion, assembly and disassembly are easy. .

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 7 are explanatory views showing an embodiment of the present invention. 1 is a perspective view, FIG. 2 is an exploded perspective view,
FIG. 3 is a partially cutaway explanatory view, FIG. 4 is a sectional view taken along line 4-4 of FIG. 3, FIG. 5 is an explanatory view from the left side surface, FIG. 6 and FIG.
The figure is each explanatory view showing a usage state. 1 ... Rod-shaped body, 3 ... Collar member, 7 ... Engagement part, 8 ... Arc-shaped expansion / contraction piece, 11 ... Hose, 12 ... Fixing cylinder, 15 ... Engagement part, 16 ... Operation Picking, 18 ... Elastic material, 20 ... Crimping tube.

Claims (1)

[Scope of utility model registration request] 1. A rod-shaped body having a male thread portion and an outer diameter-expanded portion connected to the male thread portion, and a flange member loosely fitted to the rod-shaped body and having a plurality of engaging portions in a cylindrical portion, A plurality of arc-shaped expansion / contraction pieces having an engaged portion that engages with the engagement portion and joined to the outer peripheral surface of the rod-shaped body, and each arc-shaped expansion / contraction so that these arc-shaped expansion / contraction pieces can be attached to the rod-shaped body. A ring-shaped elastic member mounted in the circumferential groove of the piece, and an operation knob for expanding or contracting each arc-shaped expansion / contraction piece in a perfect circle by screwing with the male screw portion of the rod-shaped body to advance and retract the rod-shaped body. Fitting for preventing deformation of the hose retaining cylinder consisting of.