JPS6210171B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves cutting a long soft tube made of vinyl, nylon, etc. to a certain length, and fitting it onto a columnar part of an industrial product, etc., or inserting it into a hole. This invention relates to a device for cutting and fitting a soft tube that fits inside the tube.

[Conventional technology]

Generally, in order to fit a soft tube such as a vinyl tube externally or internally into a workpiece made of an industrial product, etc., the long soft tube is crushed into two and then wound around a reel. The soft tube is let out from this reel, cut into a predetermined length, and fitted into a workpiece.

In order to fit a soft tube into a workpiece in this way, there are three methods: (1) a function to let out the soft tube from a reel, (2) a function to expand the folded soft tube into a cylindrical shape, and (3) a function to expand the soft tube into a cylindrical shape. A device is required that has four functions: (4) cutting the cut soft tube into a certain size, and (4) fitting the cut soft tube externally or internally into the workpiece.

As mentioned above, as a device for expanding and cutting a soft tube into a cylindrical shape and fitting it to a workpiece, for example, the device shown in Japanese Patent Application Laid-Open No. 53-80479 has been known. There is. This prior art device expands the soft tube into a cylindrical shape using an opening tool while feeding it from a reel, fits it into a workpiece, and cuts the soft tube to a predetermined length with a cutter. It is designed to be cut. Here, the above-mentioned opening tool is located inside the soft tube, and in order to support it in a stable state, a guide piece is connected to the opening tool, and an external support roller is attached to the opening tool. The opening tool is held stationary by supporting the guide piece from the outside of the soft tube with the external support roller. For this purpose, the external support roller is constructed by arranging two pairs of cylindrical rollers parallel to each other and spaced apart from each other in the axial direction. Each set of external support rollers is provided at an angle of 90° with respect to the other sets of rollers, and the external support roller located at the rear in the feeding direction of the soft tube is located at the circumferential body of the guide piece. An external support roller, which is in rolling contact with and further disposed on the front side, is adapted to engage with an internal support roller attached to the guide piece. Further, the cutter is composed of a fixed blade provided on one side between the opening tool and the workpiece, and a movable blade provided on the other side and moved toward and away from the fixed blade.

[Problem that the invention seeks to solve]

By the way, when expanding the soft tube into a cylindrical shape or cutting it after that, it is necessary to support the opening tool in a stable state within the soft tube, but it is necessary to support the opening tool in a stable state within the soft tube. If the guide piece is supported only at two points by external support rollers, there is a risk that the guide piece may swing in a direction perpendicular to the axis of the rollers using one pair of external support rollers as a fulcrum. The disadvantage is that it cannot be supported by the state. Also, one of the external support rollers supporting the guide piece
Since the set has a structure in which the soft tube is directly pressed against the guide piece, the sliding resistance during this period increases the resistance to the feeding of the soft tube, and there is a risk that the soft tube will wear out. Furthermore, cutting of a soft tube with a cutter is performed with one side of the soft tube supported by an opening tool and the other side supported by a workpiece. If this is not the case, there is a possibility that cutting with the cutter cannot be performed smoothly. Particularly, when the workpiece is short and the length of the tube fitted into the workpiece is short, cutting the workpiece becomes particularly difficult.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and its purpose is to:
The object of the present invention is to provide a device that has a simple structure, has the four functions described above, can operate at high speed, and can cut a soft tube into short pieces and fit it into a workpiece.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention has a spindle-like part on the leading side and a cylindrical part-like part on the tail side, and the soft tube that is sent in a flat state is expanded into a cylindrical shape in the longitudinal direction of the float. At the same time, first and second through holes are opened above and below the float, respectively, and at least three rollers are arranged in the vertical direction in the first through hole, and each roller is vertically arranged. At least one of the rollers is provided with a one-side holding roller facing one side of the float, which engages from an obliquely downward direction via the soft tube;
At least two other side holding rollers that engage with each of a plurality of rollers other than the at least one roller are disposed facing each other on the other side of the float, and a soft tube is disposed in the second through hole. A pair of feed rollers are brought into opposing contact with each other through the float, and the soft tube is rotated while being pressed from both sides, and the cylindrical portion of the float is surrounded by a gap that allows the soft tube to pass through. A first outer circumferential guide is disposed, a second outer circumferential guide is disposed on an extension line of the first outer circumferential guide, and a cutter for cutting the soft tube is provided between the first and second outer circumferential guides. The feature is that a gap is formed for insertion, and the second outer peripheral guide is in sliding contact with the outer surface of the cut tube, and the cut tube is held by the frictional force therebetween. It is something.

〔Example〕

Next, one embodiment of the present invention will be described based on FIGS. 1 to 4.

FIG. 1 is a front view of the entire mechanical device, with a portion shown in cross section. Moreover, FIG. 2 is a diagram showing the side appearance of the main part.

Reference numeral 1 indicates a reel, and 2 indicates a long soft tube of vinyl, nylon, or the like that is unwound from the reel.

The float 3, which is an important component of the present invention, is
It is arranged vertically and inserted into the soft tube 2, and while the soft tube 2 passes through the float 3, it is expanded and corrected into a cylindrical shape. There is. For this,
The float 3 has a tip portion 3a formed into a spindle shape, a central portion 3b formed flat, and a tail portion 3.
c is formed into a cylindrical shape, and the boundaries between these three parts are continuous with a smooth curved surface.

A first through hole 1 is provided on the side surface on the spindle-shaped portion 3a side.
1 (FIG. 3) is opened, and a plurality of rollers are pivotally supported within this through hole. In this embodiment, three ball bearings 4a, 4b, 4c are provided as the plurality of rollers, and their outer races are used as rollers (hereinafter referred to as rollers). On both sides of these rollers,
Holding rollers 5a, 5b, and 5c are provided facing each other with the soft tube 2 in between, and these holding rollers 5a to 5c are rotatably supported by a fixed portion of the device.

A first through hole 1 is provided in the flat part 3b of the float 3.
A second through hole 12 is opened in an extension of the first opening position, and a pair of feed rollers 6a, 6b are inserted so as to face into this second through hole 12 from both sides of the flat portion 3b.
are provided, and the feed rollers 6a, 6b are urged by the presser spring 7 in the direction of pressing against each other, thereby causing the pair of rollers 6a,
6b is designed to hold the soft tube 2 from both sides.

Further, the tail portion 3c of the float 3 has a cylindrical shape having a slightly smaller diameter than the soft tube 2 in order to expand the soft tube 2 into a cylindrical shape. A first outer circumferential guide 8a fixed to a fixed part of this device is provided so as to surround the tail portion 3c of the float 3 (see FIG. 4), and the inner surface of this first outer circumferential guide 8a A gap slightly larger than the thickness of the soft tube 2 is formed between the soft tube 2 and the outer peripheral surface of the tail portion 3c. The lower end of the first outer guide 8a extends to a position that coincides with the distal end 3d of the float 3. Further, a second outer circumferential guide 8b is provided on the same axis as the first outer circumferential guide 8a with a slight gap between the first outer circumferential guide 8a and the second outer circumferential guide 8b. It is permanently installed. A thin-blade cutter 10 can be inserted between the first and second outer guides 8a and 8b. Note that 9 in the figure is a columnar work into which the soft tube 2 is fitted.

Next, the support mechanism for the float 3 and the feeding mechanism for the soft tube 2 will be explained in detail based on FIGS. 3 and 4.

First, the three rollers 4a to 4c provided in the first through hole 11 opened in the spindle-shaped portion 3a of the float 3
are arranged in a row in the vertical direction, and the holding rollers 5a to 5c, which roll into contact with the respective rollers 4a to 4c via the soft tube 2, are as clear from FIG.
Left-hand holding rollers 5a and 5c are installed on the left side of the figure, which come into rolling contact with rollers 4a and 4c, respectively, and right-hand holding rollers 5b, which come into rolling contact with a roller 4b provided between rollers 4a and 4c, are installed on the right side of the figure.
is installed. In this way, by supporting the float 3 at two points on the left side and supporting it at one point on the right side, the float 3
is fixedly supported in the horizontal direction of the page. A holding roller 5b, which rolls into contact with the roller 4b, is disposed at the lower right in the figure, so that the float 3 is held so that it does not move downward. Furthermore, the second through hole 1
The abutting portions of the feed rollers 6a and 6b facing into the soft tube 2 for feeding the soft tube 2 are an extension of the abutting portions of the rollers 4a to 4c and holding rollers 5a to 5c described above. As a result, there is no risk that the float 3 will move unnecessarily in the front and back directions of the paper in FIG. 3, that is, in the front and rear directions. Therefore, the float 3 is stably held in the floating suspended state within the soft tube 2.

This embodiment is constructed as described above, and its operation will be explained next.

The soft tube 2, which is in a flat state and is unwound from the reel 1, is inserted from the spindle-shaped part 3a side of the float 3, which is in a floating suspended state by the rollers 4a to 4c and the holding rollers 5a to 5c, and the flat part Feed rollers 6a, 6 provided on 3b
Insert it between b. Therefore, when this feeding roller is rotationally driven, the soft tube 2 is fed downward, and the rotating rollers 4a to 4c, holding rollers 5a to 5c, and feeding rollers 6a and 6b are in rolling contact with the soft tube 2, respectively. Therefore, the resistance during feeding is significantly reduced, and it can be fed with a light load, and the soft tube 2 will not be damaged.

Here, the float 3 is in a floating suspended state by the rollers 4a to 4c and the holding rollers 5a to 5c, so even if the soft tube 2 is fed at high speed, it is held in an extremely stable state and does not swing unnecessarily. The flexible tube 2 can be smoothly fed in predetermined pitches without any inconveniences such as bending or misalignment.

The soft tube 2 folded in half as described above descends (see Fig. 4), and the float 3 passes through the gap between the provided cylindrical portion 3c and the first outer circumference guide 8a, and It will be sent into the second outer peripheral guide 8b from the surface 3d. The end portion 3 of this soft tube 2 on the float 3
When extended by a predetermined length from d, the cutter 10
is activated and moves in the direction of arrow A, and the soft tube 2 is cut. Here, float 3
The distal end surface 3d of the cutter 10 is aligned with the lower surface of the first outer guide 8a, and the soft tube 2 is held between the first and second outer guides 8a and 8b. The flexible tube 2 can be cut easily and accurately by the cutting method.

Soft tube 13 cut in this way
is temporarily held in the second outer peripheral guide 8b by frictional force. When the workpiece 9 reaches below the second outer guide 8b, the soft tube 2 is moved by the feed rollers 6a and 6b.
When feeding is performed, the soft tube 13 cut as described above is pushed out from the second outer peripheral guide 8b, descends, and is placed on the workpiece 9 as shown in the imaginary line in FIG. It is fitted externally. In this case, the workpiece 9 does not necessarily need to be supported fixedly. Further, although not shown, the same applies to the case of inserting and fitting into a hole drilled in a workpiece.

Therefore, for example, if the soft tubes are cut one after another while the workpieces are being conveyed on the conveyor and dropped onto the workpieces being conveyed on the conveyor,
Soft tubes can be fitted continuously without moving the workpiece up and down.

〔Effect of the invention〕

As described in detail above, the present invention has a structure in which the float provided for expanding the soft tube into a cylindrical shape is supported by various rollers, so that the resistance to feeding of the soft tube is significantly reduced, and the friction In addition, the posture of the float can be stabilized, so the soft tube can be fed smoothly and at high speed, and the soft tube can be held between the first and second outer guides. Since the flexible tube is configured to be cut in this state, the flexible tube can be cut easily and accurately, and the tube can be fitted without moving the workpiece up and down. Therefore, it becomes possible to automatically feed a soft tube from a reel, expand it into a cylindrical shape, cut it, and fit it externally or internally into a workpiece, and moreover, extremely smoothly and at high speed. be effective.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional front view of the entire device according to an embodiment of the present invention, Fig. 2 is an external side view, Fig. 3 is an enlarged front view of the main parts, and Fig. 4 is the same main parts. It is an enlarged partial cross-sectional side view. 2... Soft tube, 3... Float, 3a... Fusiform part, 3b... Flat part, 3c... Tail part, 4a to 4c
...Rollers, 5a-5c...Holding rollers, 6a, 6b
...Feed roller, 8a...First outer circumferential guide, 8b...
second outer circumferential guide, 9... workpiece, 10... cutter,
11...first through hole, 12...second through hole.

Claims (1)

[Claims] 1. A float having a spindle-like part on the leading side and a cylindrical part-like part on the tail side, which spreads a soft tube fed in a flat state into a cylindrical shape, is arranged in a vertical position, and a float is provided above and below the float, respectively. 1st, 2nd
at least three rollers are vertically arranged in the first through hole, and at least one of the rollers is engaged from diagonally below through the soft tube. one side holding roller is provided opposite to one side of the float, and the other side of the float is provided with at least two other side holding rollers that engage with each of a plurality of rollers other than the at least one roller. holding rollers are disposed facing each other, a pair of feed rollers are brought into opposing contact with each other through a soft tube in the second through hole, and the soft tube is rotated while being pressed from both sides; A first outer circumferential guide surrounding the cylindrical portion of the float with a gap for allowing the soft tube to pass therethrough is disposed, and a second outer circumferential guide is disposed on an extension line of the first outer circumferential guide. A space is formed between the first and second outer circumferential guides in which a cutter for cutting the soft tube is inserted, and when the second outer circumferential guide is in sliding contact with the outer surface of the cut tube, the frictional force therebetween is applied. A device for cutting and fitting a soft tube, characterized in that it is configured to hold the cut tube.