JPS6256647A - Chain - Google Patents

Abstract

PURPOSE:To prevent a bushing from running high temperature by allowing the heat generated at the slide part of bushing with a joint shaft to be released through the shaft. CONSTITUTION:No.1 ring plates 3A, 3B are coupled using a bushing 2 made of synthetic resin so as to form No.1 link 4. No.2 links 7 are connected alternately with said No.1 links 4 by using a joint shaft 9 which is formed cylindrically and passes through said bushing 2. This joint shaft 9 is equipped with radiating holes 44 throughout its length. This prevents the bushing from running high temperature to enable lightweight construction of a chain.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides joints 1 to 1 through a bush made of synthetic resin.
By increasing the heat dissipation of the shaft, bushing and joint 1
-Regarding a chain that can reduce wear on the sliding parts with the shaft and improve the durability of the chain.

[Conventional technology]

In chains used in the food, textile, and chemical industries, as well as chains for sewage treatment, bushings are made of synthetic resin to prevent the chain from becoming dirty due to rust or to improve the corrosion resistance of the chain itself. , transportation 1
It is also sometimes used for power transmission.

However, in conventional chains like this, the joint shaft, which passes through the bushing and successively connects the link plates, is made of a net material such as stainless steel, and the joint shaft is made of a solid pin-shaped body made of synthetic resin. Ta.

On the other hand, in the chain, the bush and the joint 1 rotate and slide relative to each other due to bending due to vibrations caused by turning the chain under tension, and when the chain wheel is in contact with the chain wheel. Moreover, the sliding portion generates heat due to the sliding movement.

[Problem that the invention seeks to solve]

However, in the conventional chains described above that use bushings made of synthetic resin, the joint shaft that passes through the bushings is a solid body, so even when formed using ■ material, the dissipation of heat generated in the sliding parts is poor. It is inferior, and the sliding parts tend to become hot.

Therefore, bushings made of synthetic resins are affected by heat, causing softening and other effects that reduce their mechanical properties.1. There is also the problem of accelerated wear. There is also the problem that the durability of the chain itself is reduced due to deterioration of mechanical properties.

The present invention improves the heat dissipation of the joint shaft passing through a synthetic resin bushing, thereby reducing the temperature of the sliding part, preventing deterioration of mechanical properties, improving wear life, and increasing the durability of the chain. The aim is to provide a chain that can solve the above problems, such as by increasing the

[Means for solving problems]

Hereinafter, one embodiment of the means of the present invention capable of achieving the above-mentioned objects and solving the problems will be described with reference to the drawings.

In the figure, a chain 1 has a bush 2 made of synthetic resin.
A first link 4 formed by combining first link plates 3A and 3B, and a second link 7 having second link plates 5A and 5B and arranged alternately with the first link 4. are connected using a joint 1-M9- which has a cylindrical shape and passes through the bush 2.

Note that in this embodiment, the first and second link plates 3A,
3B, 5A, and 5B are offset link plates that are bent into a substantially Z-shape, and each of the first links 4 and second links 7 is connected to the first link plate 3A.
, 3B, second link plates 5A, 5B and bush 2-
By integrally molding them into the same shape, and connecting them, a so-called bottle I-le chain is formed.

The first link plates 3A, 3B are formed by forming outer piece portions 23 parallel to the inner piece portions 21 on both sides of the bushing 2 through inclined portions 22 that are bent obliquely outward. Z
The inner piece 21 has a through hole 25 passing through the bush 2, and the outer piece 23 also has a through hole 26 that separates the through hole 25 from the chain pitch. It is bored facing each link plate 3A, 3B.

The outer piece 23 has a surrounding wall 27 along its outer surface and outer edge.
．． 29 is provided around the periphery, and stays 30.30 extending along the outer edge of the inclined portion 22 are connected to the surrounding wall 27.29.

Further, the surrounding wall 27 of the link play 1-3A has a recess 31 with a larger diameter than the through hole 25 formed therein, and the surrounding wall 229 of the link play 3B has four parts having a locking part 33 in the shape of a missing circle. 34 is formed. Literature 1 link plate 3A,
3B, by integrally molding the bushing 2 using synthetic resin, the bushing 2 can connect the first link plates 3A and 3B on both sides, and the bushing 2 is formed using synthetic resin. becomes. Examples of synthetic resins include polyamide resins such as nylon, polyacetal resins such as Duracon (trade name), Delrin (trade name), and even P.
Various engineering plastics such as EEK (polyetheretherketone) resin can be used, and in addition to the above-mentioned thermoplastic resins, thermosetting resins can also be used for molding. In addition to metal pieces, the tensile strength can also be improved by inserting inorganic fibers such as metal fibers and glass fibers, organic fibers such as carbon fibers and synthetic resin fibers, etc. during molding.

Note that the first link 7 has the same shape as the first link 4 as described above, and the length L between the outer surfaces of the inner piece portions 21 and 21.
1 is the distance between the inner surfaces of the outer piece part z3.23, and is formed slightly more in the middle than 2. Therefore, the inner pieces 21.21 of the first and second links 4.7 arranged alternately at both ends of the bushing 2
is loosely inserted between the outer piece parts 23 and 23 of the adjacent rib links 4 and 7, and the outer piece part 23 is inserted outwardly from each inner piece part 21, and the degenerate 2
5.26 is aligned and arranged. Also, by inserting the join 1-shaft 9 into the aligned through holes 25, 26, the first and second 11 links 4, 7 are connected to form a series of chains 1.

The joint shaft 9 has a flange having a notch-shaped rotation stopping portion 37 at one end of the body portion 36 that fits loosely into the through hole 25, 26 and which fits loosely into the recess 34 and engages with the locking portion 33. 39
has been established. Further, at the other end, a tapered guide portion 40 is provided.
A circumferential groove 42 for fitting a retaining ring 41 is formed in the base thereof.

Further, the joint shaft 9 has a cylindrical shape with a heat radiation hole 44 provided therethrough over its entire length.1. The joint l-shaft 9 can be molded using steel materials such as stainless steel and carbon steel, metals such as aluminum, copper, nickel, and brass, or various synthetic resins such as thermoplastic and thermosetting resins. Sometimes inorganic materials such as ceramics can also be used. Note that when using materials such as carbon steel and stainless steel, which have relatively low thermal conductivity but low strength, the joint shaft 9 can be formed into a thin-walled pipe shape. In addition, when using materials such as synthetic resin that are inferior in strength to steel, reinforcing fins 4 are used as shown in Figure 4.
The racks are placed so as to divide the heat dissipation holes 44 into sections. The shape and number of the fins 45 can be freely set, and the fins 45 can be freely set.
can be used to enhance the heat radiation effect of the heat radiation holes 44. Further, such fins 45 can be employed in the joint shaft 9 formed by drawing or the like, as well as those formed by molding of synthetic resin or the like. The fins 45 can also be formed in the form of protrusions that protrude inward, as shown in FIG. The joint shaft 9 is preferably made of a non-corrosive material, and if a rust-prone material is used, the joint shaft 9 is surface-treated to prevent corrosion.

As shown in FIG. 1.2, the joint shaft 9 is assembled by engaging the rotation preventing part 37 and the engaging part 33, fitting the flange 39 into the recess 34, and inserting the body part 36 into the J3 hole 25.26.
Insert into. Further, in the recess 31, a collar 46 is interposed, and a stopper 41 is attached to the circumferential groove +42. Therefore, the zico in 1-axis; (is the second link play 1-5A, 5
B and connects the adjacent eleventh and second links 4.7.

Also, the rotation stopper part 37 and the first part 33 are sealed in! - Stops the shaft 9 from rotating to prevent wear caused by free movement.

[Effect]

Therefore, in this embodiment, the chain 1 has the first and second links 41 and 7 made of synthetic resin 7, and the joint shaft 9 is made of a corrosion-resistant material, thereby improving the corrosion resistance of the chain. Therefore, it can be used as a corrosion-resistant chain in sewage treatment plants, food processing plants, chemical industries, etc. It can be used. Also, since the joint shaft 9 is provided with a heat radiation hole 44.

Even when the sliding part generates heat due to the bending of the bush 2 and joint shaft 9, it will not work properly! The heat can be absorbed into the bush 2 9, and the heat can be radiated from the heat radiation hole 44.
can prevent high temperatures. As a result, the S mechanical performance of the bushing 2 can be maintained, its deterioration can be prevented, and wear can be reduced.
Improves chain life and durability.

〔Example〕

6-7 show other embodiments of the invention.

In this embodiment, the joint shaft 9 connecting the first and second links 7 is made of a metal material that is thin and has a higher thermal conductivity than the m material.

The thermal conductivity (Kcal/mh''C) is 37.18 for 0.5% carbon steel and 14 for Cr-8Ni stainless steel, while it is 196 for aluminum and 332.9 for copper.
9.9% nickel is 77, zinc is 96, and Jade brass is 95.
A metal material having a thermal conductivity (K ca 1/m, h'C) higher than that of carbon steel, that is, more than 40, is used.

Further, the joint shaft 9 is provided with a flange 39 having a rotation preventing portion 37 at one end of the body portion 36 that is the length between the outer surfaces of the outer piece portions 23 and 23. A core shaft 11 is inserted through it to reinforce the joint shaft 9.

The core shaft 11 also has a cylindrical shape in this example, and has a flange 53 having a rotation stopper 52 at one end of the body 51, and a circumferential groove 54 at the other end, and a stopper that fits into the circumferential groove 54. 1. By the collar 56 inside the import 41. By preventing the joint shaft 9 from being removed, the joint shaft 9 is held by the second link plate 5.

The core shaft 11 is a reinforcing material made of a material with excellent strength, such as carbon steel or stainless steel, so that the heat generated in the bush 2 can be radiated to the outside through the joint shaft 9.

The core shaft 11 can also be formed into a solid shape, as shown in FIG.

9 and 10 show still another embodiment of the present invention, in which the first and second link plates 3.5 are not integrally formed but are formed as an assembly. Note that bushing 2
is made of synthetic resin, and the first and second link plates 1-3.5 can be molded using metal, synthetic resin, or the like. Further, in this example, the joint shaft 9 is prevented from being removed using a T-bin 56.

11 and 12 show another embodiment of the present invention in which the chain 1 has a roller chain shape, and the bushing 2 made of synthetic resin
The first link plates 3A, 3 made of metal etc.
A second link 7 having second link plates 5A and 5B arranged on the outside of each of the first link plays 1-3A and 3B at both ends of the bushing 2. are connected using a cylindrical joint shaft 9, and a roller 59 is loosely fitted into the bush 2.

The joint shaft 9 is provided with a flange 39 at one end thereof, and the other end is bulged outward after insertion to prevent the second link plates 5A, 5B from being removed. The other end may be bulged outward by caulking when metal is used, or by welding when synthetic resin is used to form the joint shaft 9.

〔Effect of the invention〕

In this way, the chain of the present invention connects the first link, which is connected to the first link plate using a bush made of synthetic resin, and the second link, which is arranged alternately with the first link, in a cylinder. Since they are connected using a joint shaft which has a shape 7 and passes through the bush, heat generated at the sliding portion between the bush and the joint shaft can be easily radiated to the outside via the joint shaft. As a result, the bushing is prevented from getting too hot,
It prevents deterioration of the mechanical properties and sliding properties of the bushing, prevents wear, and improves chain life and durability. Furthermore, since the bushing is made of synthetic resin, it is useful for reducing the weight and cost of the chain, as well as increasing corrosion resistance, making it versatile for uses such as sewage treatment. Further, as shown in the above embodiments, the chain can be formed as various transmission or conveyor chains such as bottle chain, roller chain, bushed chain, etc., and various attachments can be attached to the chain.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional plan view showing an embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is an exploded perspective view showing one link, and Figs. 4 and 5 show the joint shaft. 6 is a sectional view schematically showing another embodiment, FIG. 7 is a perspective view schematically showing a joint shaft, FIG. 8 is a sectional view showing still another embodiment, and FIG. 9 is a sectional view showing another embodiment. Another embodiment of the present invention is shown in a front view,
FIG. 10 is a partially sectional plan view, FIG. 11 is a front view showing still another embodiment, and FIG. 12 is a partially sectional plan view. 2.-bush, 3A, 3B-first link plate, 4.-first link, 5A, 5B-second link plate, 7.-second link, 9.-joint shaft, 11.-
Core axis. Patent applicant: Tsubakimoto Co., Ltd. Chain agent: Patent attorney: Tadashi Naemura 1!6 Review No. 8

Claims (1)

[Claims] (1) A first link formed by connecting first link plates on both sides by a bush made of synthetic resin, and a second link plate arranged on each outside of the first link plate at both ends of the bush. The first link and second links arranged alternately are connected using a joint shaft that is held by the second link plate, has a cylindrical shape, and passes through the bush. chain.