JPS58113619A - Functional shaft - Google Patents

Abstract

PURPOSE:To produce a functional shaft easily by connecting synthetic resin sections located inside and outside a cylinder through a cylinder through hole and by constituting the outside section into a functional member in a power transmission shaft, etc. made by providing a cam on a shaft bar. CONSTITUTION:A functional shaft 1 is composed of a cylinder 2, a functional member A3 and a synthetic resin section 4, which is composed of synthetic resin sections 4a, 4b inside and outside the cylinder, and both of them are connected to each other through a through hole 6 of the cylinder 2 and the synthetic resin section 4b constitutes a functional member B5. The functional member A3 is constituted in a pulley shape and is formed with a metallic or hard synthetic resin so as not to generate strains. In addition, the functional member B5 is constituted into a roller shape to convey plates, etc. and is formed with a somewhat soft and elastic synthetic resin to improve the adhesion. This shaft can be easily produced in one body by fitting the cylinder 2 and the functional member A3 in one unit in a fixed mold and by continuously injecting the synthetic resin section 4 through the cylinder through hole 6 for molding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a functional shaft body made of synthetic resin which has a strong structure and is easily manufactured. Consisting of member A and a synthetic resin part located inside and outside the cylinder and provided integrally with the cylinder. 95 The synthetic resin part located inside and outside the cylinder The synthetic resin part that passes through and continues through the hole and is located outside is related to the 11I functional shaft body that constitutes the functional member B at a position near the through hole.

Synthetic resins, which are lightweight and have excellent moldability, are widely used as materials for forming power transmission shaft bodies in which cams and gears are provided on the shaft rod, and various types of fans in which the fan rotor is installed in the rod. In other words, the shaft rod is made of synthetic resin 15#II, the synthetic resin IIO functional member is separately attached to the metal shaft rod, and the shaft rod and the functional member are made of synthetic resin and integrated continuously. It is also insert molded. Separately attached functional components are the best for long-term use! The 4-shaft part may come loose, especially if the functional part is a power transmission part such as a cam or gear, and as it is always under force, it will come loose quickly, so it takes a lot of effort to firmly attach it to the structure so that it will not come loose. It took a while. On the other hand, the shaft rod and the functional member are integrally made of synthetic resin and are insert-molded, which may cause slight distortion due to the shrinkage difference between the resin and the solid rod, the detent, and the positioning shape. In some cases, the reinforcing solid rod may deviate from the center position due to injection pressure during molding, etc., and when such a rod is used, it is difficult for it to run out during rotation.

In view of this, none of the three conventional products mentioned above are satisfactory in terms of use, and improvements are awaited.

The present invention has been made to provide a functional shaft made of synthetic resin that eliminates all of the drawbacks of the conventional products mentioned above:
There is 'c.

The functional members A and 41 function member B referred to in this invention refer to the functional shaft when the cylinder is not limited to a mere rod but also functions as a power transmission shaft, etc. means a member provided to perform a desired function.

This invention will be described in detail below with reference to embodiment drawings, but this invention is limited to the following embodiments.
It consists of I and a synthetic resin part (4). Synthetic resin part (4)
consists of a synthetic resin part (4a) located inside the cylinder and a synthetic resin part (4b) located outside.The synthetic resin part (4b) located outside constitutes the functional member B (5). .
Functional member A (3) is configured in a single shape, and functional member B
(5) is configured in a roller shape), and functional member B (5) is made of metal or hard synthetic resin.
) is 1 compared to synthetic resin with slightly softer elasticity. The roller-shaped functional member (B) is made of a synthetic resin with a slightly soft elasticity and has a high adhesion as it feeds a plate, etc. (The roller-shaped functional member (B) is made of a synthetic resin with a slightly soft elasticity and is rotated by a belt.)
)-shaped functional member A■ must not be distorted, so it is made of a metal-hard synthetic resin VcL.

Hereinafter, the manufacturing process of the functional shaft (1) will be explained with reference to the t-aS diagram, and the advantages of this manufacturing process will be described.

During injection molding, there is a tit fixed mold and a moving wave, and the cylinder body (2) and the cylinder body (2) are integrally attached to the fixed mtx + P3 with the functional member A■. ) to match Iji(X)K.

aO is a through hole of the cylindrical body (2) that exits the cavity for forming the functional member B (5), and (a) is an injection port for the molten synthetic resin.

Therefore, when molten synthetic resin is injected from the injection port (a),
Synthetic resin parts (4a) located inside and outside the cylinder (2)
), (4b) are provided continuously through the through hole (6),
The internal synthetic resin part (4a) is a functional member A (3) at one end.
and join in a fixed state. According to such a manufacturing method, the cylindrical body (2), the functional member A (3), and the synthetic resin part (4) are integrally obtained during injection molding, so that manufacturing workability is extremely good.

When injecting molten synthetic resin, high pressure is applied to the cylinder from the inside, but since most of it is in contact with the inner surface of the mold, it does not deform.This means that the cylinder must have a very strong structure to withstand the resin pressure. Since there are no cracks, relatively inexpensive thin-walled pipes can be used.

Furthermore, although the synthetic resin part has a large thermal shrinkage, the internal synthetic resin part is continuously fixed to the external synthetic resin part through the through hole, so the longitudinal part of the cylinder is the biggest concern. The shrinkage in the direction is suppressed, and since the synthetic resin part outside the frame is small, the shrinkage is small, so the overall dimensional accuracy is reduced.
It has excellent properties and is also very easy to mold.

For the cylinder (2), other than aluminum materials, metal materials such as steel and mild steel, and thermosetting or heat-resistant resin pipes can also be used, but they are said to have excellent rigidity and excellent heat resistance during molding. It is desirable to use a metal material at this point. The materials of the functional member A (31) and the synthetic resin part (4) are selected as appropriate for the desired function of the functional shaft (1), and the material of the functional member A (3) may be metal or A blue-green heat-resistant resin is used, and as the synthetic resin II(4)0 material, general-purpose resins such as BoI nopropylene resin and positive ethylene resin, and all thermoplastic resins such as polyacetal resin and noryl resin are used. Figure 4 shows another example, in which the functional member G) is a gear with teeth all around the circumference, and the functional member B (5) is a gear with teeth in two directions [12]. At this time, the functional member a1 is placed in a disc-shaped cavity with no tooth notches in the mold, so that it can be removed from the mold in any direction.

In addition, the gear of functional member B (5) has 11 teeth in the extraction direction (indicated by the arrow) so that there is no undercut in 1 to 6 during die extraction.
Only two opposing directions are provided.

The structure of this embodiment is used when it is desired to obtain various functional components from the same synthetic resin material, and some of the functional components may be undercuts and cannot be easily cut out. This can be done if necessary. (Ha, (7'
>Fi is 65 for each sliding part, one is functional member A (3)
The other is provided integrally with the synthetic resin part (4).

Functional member A (3) and functional member B (5) are made of the same material.

It is also possible to use different materials, and materials with different physical properties. The physical properties are hardness, wear resistance, etc. As mentioned above, as shown in fi1 diagram, Fi, functional member A(3) has a high hardness, and functional member B
In (5), a material having low hardness and elasticity is used, and if the materials are selected so that Im functional material At31 and functional member B (5) can perform their functions satisfactorily. Functional member A(3) and functional member B(5) may both be 1 even if there are a plurality of them or a plurality of types.

Figure m6 and Figure 6 show other examples of the mounting state of functional member A (31) on the cylinder body (2). (81K
A ring-shaped groove +91 is provided, and the synthetic resin part (4) bites into this groove 191, so that the functional member A (3) is firmly fixed to the cylinder (21).I
I! Attachment insertion part (8°) of functional member A (3) shown in 6IIK
) is configured to be flat 9, and both sides of the mounting insertion portion (8゛) are fitted into the notch QGK provided oppositely to the end of the cylinder (2). Therefore, the force in the rotational direction of functional member A■O is received by the cylinder (21), so it is effective if the shaft (in our power method operating shaft #M function member A■ performs a rotational function). be.

Note that the functional member A (3) can be fixed to the cylinder (21) by using screws, etc. if a large degree of constant strength and length is desired, but when molding the synthetic resin part (4), It can be done by utilizing the adhesive properties of the molten resin.

FIG. 7 shows another embodiment of the structure near the through hole (6) of the cylinder (21), and shows a joint *sr resin part (4b) located outside the cylinder (p).
) When the edge I of the through hole ( ) rises up inside the hole and sinks in, this configuration is better than the configuration shown in the cross-sectional view of Figure 2 ↓ Functional member B (5), which is the synthetic resin part (4b) on the outside The cylinder body (21) is firmly fixed to the cylinder body (21).
) (General [1 to 51010) In other words, in the latter case, during molding, the molten resin is subjected to high pressure (
The pressure of molten synthetic resin during injection molding is usually 250~sook.
When the liquid flows completely through the through hole (6) to the outside, the pressure causes the edge l of the through hole (6) to rise.

Figures 10 and 11 show other embodiments of the through hole (6) in which the cut edge I is configured to stand up; Being elongated in the circumferential direction is not preferable because it lowers the glk of the cylindrical body (2). The through hole (6) shown in FIG. 12 is opened during resin injection. Although the raised shape of the edge I in the above-mentioned process is formed during molding, it can also be formed at the same time in the stamping hole (61tn) punched out.

In the above-mentioned embodiment, the functional shaft (1) is a shaft for power transmission, and the other functional members of the above-mentioned embodiment (2) and the functional member B (5) are suitably equipped with gears, pulleys, rollers, etc.
All you have to do is add the middle cam. FIG. 18 shows another embodiment,
Functional member A (31 is in the shape of a pulley, whereas functional member B (5) is a brush body made of a slightly soft material 9, which is used as a car wash brush, etc. Other possible embodiments include: Examples include cross-flow fans of cooling and loosening machines, and shafts of noodle press machines.

This invention has a functional axis constructed as described above.
This can be easily manufactured, and since the cylindrical body is used as the framework, there is no need to worry about distortion and vibration during rotation.

Furthermore, since the functional member B is continuous with the synthetic resin part inside the cylindrical body, it is firmly installed.Furthermore, it also has a functional member A that is manufactured separately from this locking member B, so it can perform a variety of functions. It is something that can be demonstrated.

111 is a perspective view of an embodiment of this invention, FIG. 2 is a vertical sectional view of the same, FIG. 8 is a side view of this invention with detailed explanation omitted, and FIG. 4 is a side view of another embodiment. , Fig. 6, Fig. 6 is a perspective view of another embodiment showing the installation of the functional member A, Fig. m7 is a vertical sectional view of another embodiment near the through hole of the cylinder, and Fig. 8 is a through hole of the one shown in Fig. 2. Fig. 9 is a plan view showing the through hole of the structure shown in Fig. 7;
810, FIG. 11, and FIG. 12 are plan views of other embodiments of the through hole, and FIG. 18 is a perspective view of another embodiment of the present invention.

(1)...Functional shaft body, (2 pieces...Cylinder body, (3)...
Functional member A, (41...Synthetic resin part, (5)...Functional member B, t61...Through hole.

Y6 3
Name machine basket shaft 3, relationship with the case of the person making the amendment Tatami permit applicant address: Osaka City, Yodoyo-ku, Juhe Hata, 8-chome, 1ii, 14, IT-1!
4. Agent 〒5SO 6. Number of inventions increased by amendment 7. Contents of the amendment subject to amendment (11 Specification No. 11 car, line 8 to iris line 7 "Figure 18 is loose... . . . will be used." is deleted.

(2 Ibid., page 12, lines 7-8 “Figure 11, @1
Figure 2 is a perspective view of another embodiment.

" is fixed as "Figures 11 and 12 are plan views of other embodiments of the through hole."

(Delete Figure 18 of the drawings.

Claims (1)

[Scope of Claims] L A system consisting of a cylinder, a functional member A provided integrally with the cylinder, and a synthetic resin part located inside and outside the cylinder and integrated with the cylinder, The synthetic resin parts located inside and outside the cylinder are continuous with each other through the through hole designed in the cylinder, and the synthetic resin part located outside has a function that constitutes the function IINB at a position near the through hole. Axial body. 1. An OII functional unit as described in claim smi, in which the functional part is made of a synthetic resin and a material that constitutes the functional member Bt-11. 2. The functional shaft according to claim 1, wherein the functional member B is made of the same material as the synthetic resin constituting the functional member B. 112. The functional shaft according to claim 111, wherein the functional member A is made of a material having different physical properties from the synthetic resin constituting the functional member B. b. The functional shaft according to claim III, wherein the cylindrical body is made of metal. & The functional shaft according to claim 1111, which is a shaft for power transmission.