JPS6325149Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an endless packing manufacturing device, and more specifically, an object of the present invention is to provide a manufacturing device that is convenient for manufacturing endless packing exhibiting different planar shapes or endless packing having different overall lengths. do.

Japanese Patent Publication No. 56-39272 discloses a means for manufacturing an elastic ring made of a rubber-like elastic material and having a rectangular cross-sectional shape, as shown in FIG. 1. The elastic ring manufacturing means shown in the figure is such that a tubular material 2 is extrapolated onto a roughly rod-shaped chuck shaft 1, and while the chuck shaft 1 is rotated, a cutter 3 placed near the chuck shaft 1 is aligned with the axis of the chuck shaft 1. The width of the elastic ring is set by feeding in the orthogonal direction and the cutting tool 3 is fed in the axial direction to cut the elastic ring, but this manufacturing method still has the following problems.

Since the structure is designed to cope with cutting resistance by the fitting force between the material and the chuck shaft, a considerable fitting force is required between the material and the chuck shaft, and a large force is required to attach the material and remove the product. It may be necessary to install special means for this purpose.

Since the structure is such that the material is extrapolated onto the chuck shaft, a chuck shaft that matches the dimensions of the product must be prepared.

When manufacturing different products, it takes time and effort to replace and center the chuck shaft.

In particular, for long products, the diameter of the chuck shaft becomes large, making it difficult to maintain the shaft center during processing.
This makes stability difficult, resulting in a decrease in product accuracy.

The production of an endless packing having a planar shape other than a circle, such as the rectangular packing shown in FIG. 3, from a material having a cylindrical shape other than a cylinder, such as the rectangular cylindrical material 2 shown in FIG. 2, is shown in FIG. 4. As shown in the figure, a rectangular cylindrical material 1 is fitted into a chuck shaft 1 having a circumference that matches the length of the endless packing.However, in addition to the above-mentioned problems, the chuck shaft 1 Since the curvature of the circumferential surface is small, as shown in the figure, the contact of the short side of the material 2 with the circumferential surface of the chuck shaft 1 is not necessarily stable, and a decrease in precision at the short side cannot be avoided.

In view of the problems with the manufacturing means of the prior art described above, the present invention has been developed by arranging two shafts with an appropriate distance between their center axes, wrapping an endless belt-like material around the two shafts, and at least one of the two shafts. The belt-shaped material is driven to give motion to the belt-like material, and the endless packing is cut by cutting blades placed near one of the two axes. This is intended to ensure adaptability to differences and maintain machining accuracy.

The stretched belt-like material is stretched by adjusting means that changes the distance between the two axes, and appropriate material guiding means is provided to regulate the axial deviation of the belt-like material during movement. To guide the belt-like material during movement, the movement course of the belt-like material can be set by arranging a roller or a sliding member that contacts the end surface of the material near the shaft, or by guiding the belt-like material around the circumference of at least one of the two axes. Either the surface is formed into a single taper that tapers gently from the flange part attached to the middle of the shaft toward the end, and the belt-like material is drawn toward the flange side by the rotation of the taper peripheral surface, or the belt-like material is Near at least one of the axes,
Either the holding rollers are arranged so that their central axes are not parallel to each other, and the rotation of the holding rollers pulls the belt-like material toward the flange of the shaft, or the central axes of the two shafts are arranged so that they are not parallel to each other. This is achieved by, for example, moving the belt-like material toward the side where the central axis is separated from the center axis as the shaft rotates, so as to come into contact with the flange.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an endless packing manufacturing apparatus according to the present invention will be described based on the drawings. In the embodiment of FIG. 5, the drive shaft 5 is provided with a flange 6.
and a driven shaft 7 are arranged substantially parallel to each other, a belt-shaped material 2 is wound around the two shafts 5 and 7, and an adjustment means (not shown) is arranged to extend and contract the distance between the central axes of both shafts 5 and 7. A guide roller 9 is arranged near both shafts 6 and 7 and on the side where the material 2 is rolled up, and a cutting tool 3 is provided with moving means in the axial and radial directions (not shown) near the drive shaft 5. It is located.

In the embodiment shown in FIG. 5, by forming the circumferential surface of the driven shaft 7 into a tapered shape with both middle and high sides, it is possible to eliminate lateral vibration of the belt-like material and to perform stable movement.

In the embodiment of FIG. 5, the driving shaft 5 and the driven shaft 7
By attaching a flange 6 to the shaft and arranging both shafts 5 and 7 in a non-parallel manner so that the center axes gradually approach each other from the flange side to the end side, the belt-like material is attached to the flange side as the shaft rotates. They move toward each other and make stable movements.

In the embodiment shown in FIG. 6, a holding roller 11 whose center axis is slightly inclined with respect to the center axis of the drive shaft 5 is arranged near the drive shaft 5 and on the winding side of the belt-like material 2, and the belt-like material 2 is As the drive shaft 5 rotates, the holding roller 11 causes the belt-like material 2 to shift toward the flange 6 of the drive shaft 5, thereby stabilizing the movement of the belt-like material 2.

Since the endless packing manufacturing apparatus according to the present invention has the above-mentioned structural requirements, the following effects are brought about.

The belt-shaped material is wound around the circumferential surfaces of two shafts whose distance between the center axes can be adjusted to impart motion, and the belt-shaped material is configured to produce an endless packing by axially feeding the cutting tool and making radial cuts. If it is an endless belt-like material,
Regardless of the shape of the annular body (for example, the shape shown in FIG. 2), the packing can be obtained by cutting the annular body to the required dimensions with high precision.

Since the distance between the axes of the two shafts is adjustable, there is no need to make multiple types of chuck shafts according to the product's inner diameter even if the product's inner diameter varies, as in the conventional example, reducing shaft manufacturing costs. I can do it. In addition, since the belt-shaped material is wound around two shafts, by devising the shape of the two shafts and the distance between the axes as in the embodiment, even if the cutting resistance of the cutting tool is large, the belt-shaped material can be rotated at a constant speed without idling. The cutting surface, which is the sealing surface, can be processed with high precision.

When cutting the material by fitting it onto the chuck shaft as in the conventional case, fitting force is a necessary condition, so when cutting the axially middle part of the material, there is no escape as the blade cuts into the material, so it should be sealed. The processed surface becomes an inclined surface or a step is formed on the processed surface, resulting in a reduction in the sealing ability of the packing. On the other hand, in this invention, since the belt-shaped material is rotated by two axes, the shaft on the cutting tool side is formed with an optimal outer diameter that reduces the relative joint area and makes it easy for the cutting tool to cut, regardless of the inner diameter of the belt-shaped material. can. the result,
Since the belt-like material can be cut while being driven by the other shaft, it is possible to cut into the middle part of the belt-like material with a cutter to form a surface with precision.

Even in the production of a product with a corner portion rather than a circular planar shape, such as the rectangular endless packing illustrated in FIG. 3, since the rotating shaft has a small diameter, the corner portion can maintain sufficient contact with the rotating shaft. Therefore, cutting accuracy is also maintained at a high level.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a manufacturing means according to the prior art, and FIG. 2 is a perspective view showing an example of a material to be processed by the endless packing manufacturing apparatus according to the present invention.
FIG. 3 is a perspective view showing the product shape of the endless packing, FIG. 4 is a front view showing the manufacturing situation, FIG. 5 is a perspective view showing an outline of an embodiment of the endless packing manufacturing apparatus according to the present invention, and FIG. The figure is a perspective view showing an outline of another embodiment. 1...chuck shaft, 2...material, 3...cutting tool,
5... Drive shaft, 6... Flange, 7... Driven shaft,
9... Guide roller, 11... Holding roller.

Claims (1)

[Claims for Utility Model Registration] 1. A system comprising two shafts on which a belt material is wound, with at least one shaft serving as a drive shaft, comprising an adjustment means capable of adjusting the distance between opposing axes and bearing means rotatable respectively. , a cutting tool having a blade that is movable relative to one of the two shafts substantially in an axial direction and a radial direction, and a belt-shaped material wound around the two shafts is rotated by the drive shaft. An endless packing manufacturing device that cuts the packing into a predetermined width in the axial direction using the cutter while cutting. 2. The endless packing manufacturing apparatus according to claim 1, which is a registered utility model and includes two shafts arranged substantially in parallel and a guiding means that abuts against the side surface of the helt-like material. 3. The endless packing manufacturing apparatus according to claim 2, wherein one of the two shafts has a large diameter at the center in the axial direction and a tapered shape toward both ends with a small diameter at both ends. 4. A utility model according to claim 1, wherein the peripheral surface of at least one of the two shafts is formed into a single taper tapered toward the end, and the two shafts are arranged in parallel. Endless packing manufacturing equipment. 5. The endless packing manufacturing apparatus according to claim 1, which is a registered utility model and comprises two shafts arranged in a non-parallel state with their central axes being close to each other with their distal ends close to each other. 6. The endless packing manufacturing apparatus according to claim 1, which is a registered utility model and comprises a holding roller arranged near at least one of the two shafts, the center axis of which is inclined with respect to said one shaft.