JPH0564559U - Cushioned chain - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the impact when it contacts other members. [Structure] A channel-shaped cushioning member 20 is attached to the outer plates 11, 11 of the chain body 10. Cushioning material 20
Both ends of the connecting pins 14, 14 are pin holes 22a, 2
It is detachably attached to the chain body 10 by fitting with 2a. The cushioning material 20 is integrally formed of a resin material, a hard rubber material, or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a chain used for a lift machine such as a forklift in particular, and does not damage other members or generate unpleasant metallic noise even if they come into contact with other members nearby. Regarding a chain with a cushioning material.

[0002]

[Prior Art]

 For lift machines such as forklifts, a lift drive chain (hereinafter referred to as a lift chain) is used together with a hydraulic cylinder.

Since the lifting chain is extended in a vertical direction in parallel with an upright hydraulic cylinder, it often vibrates during operation and comes into contact with other members including the hydraulic cylinder. , Damage the hydraulic cylinder, etc. or generate unpleasant metal noise. Therefore, in order to prevent this, a lift chain incorporating a protective plate made of a resin material has been proposed (Japanese Patent Laid-Open No. 60-159442).

This is one in which a plate-shaped protection plate is incorporated into a chain body formed by connecting an eyebrow-shaped outer plate and an inner plate so as to be sandwiched by the outer plate. The protective plate is basically formed in a trapezoidal shape or a hexagonal shape larger than the outer plate and the inner plate, and is integrated with the outer plate and the inner plate into the chain body by a connecting pin. A part of the protective plate projects to the outside of the chain body, so that it is possible to mitigate the impact when coming into contact with other members and prevent noise.

[0005]

[Problems to be solved by the device]

 According to such a conventional technique, the protection plate, like the outer plate and the inner plate, is incorporated into the chain body through the connecting pin, and therefore, replacement at the time of breakage is impossible, and the cost is low. There was a problem that it was disadvantageous. That is, in general, it is sufficient to consider contact with other members only for a specific part of the entire length of the lifting chain, but this protective plate is used when the chain is assembled. It is extremely uneconomical because it is assumed that it will be installed along with the inner plate along its entire length.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to attach a cushioning material to the assembled chain body afterwards, so that the cushioning material can be replaced very easily when it is damaged. Another object of the present invention is to provide a chain with a cushioning material that is easy and can be attached only to an arbitrary required portion of the entire length.

[0007]

[Means for Solving the Problems]

 The structure of the present invention for achieving such an object comprises a chain main body and a groove-shaped cushioning material that commonly covers a pair of opposing outer pads of the chain main body, and the cushioning material comprises both end portions of the outer plate. Its main point is to attach it removably via a connecting pin that protrudes inward.

The cushioning material may have a length corresponding to twice the pitch of the chain body.

[0009]

[Action]

 With such a structure, the cushioning material is formed in a groove shape as a whole, covers the pair of outer plates facing each other in common, and is detachably mounted via the connecting pin, so that the assembly of the chain main body is completed. Later, it can be retrofitted only to the necessary parts of the total length. In addition, it is easy to replace when damaged.

If the length of the cushioning material is equivalent to twice the pitch of the chain main body, the bending of the chain is restricted so that the bending direction of the main body of the cushioning material is allowed only in one direction and not in the other. Since it can act as a member, it is possible to further reduce the chance of the chain inadvertently contacting other members arranged in parallel.

[0011]

【Example】

 Hereinafter, embodiments will be described with reference to the drawings.

The chain with cushioning material is formed by detachably mounting the groove-shaped cushioning materials 20, 20, ... To the chain body 10 which is a leaf chain (FIGS. 1 and 2).

The chain body 10 is illustrated as a so-called 3 × 4 leaf chain, and has a pair of outer plates 11, 11, one inner plate 12, and four inner plates 13, 13, ... And are alternately connected via the connecting pins 14, 14.

The cushioning material 20 is integrally molded from an elastic material such as a resin material or a hard rubber material, and is formed in a groove shape as a whole. That is, in the cushioning material 20, hanging parts 22, 22 are vertically provided on the long side of the rectangular top plate portion 21, and the hanging parts 22, 22 are provided with a pair of pin holes 22a, respectively, so as to correspond to each other. 22a is formed. The lower end of each hanging portion 22 is formed in a saddle shape similar to the outer plate 11, and an inclined surface 22b is formed on the inner surface side thereof.

The pitch p of the pin holes 22a, 22a of the cushioning member 20 is the same as the pitch po of the chain body 10. Further, the length L of the cushioning material 20 is set to L = 2 po, and the distance d between the inner surfaces of the hanging parts 22 and 22 is d with respect to the width w between the outer surfaces of the outer plates 11 and 11 of the chain body 10. ≤w (Fig. 3). The height h1 of each hanging portion 22 above the pin holes 22a and 22a is h1 ≥h / 2 with respect to the height h of the chain body 10 and below the pin holes 22a and 22a. The height h2 of each is slightly shorter than the corresponding dimension of the outer plate 11 (Fig. 4).

The cushioning material 20 can be attached to the chain body 10 in one movement by pushing in the direction of arrow A in FIG. That is, when the cushioning member 20 is made to correspond to the pair of outer plates 11 and 11 facing each other, and a force is applied in the direction of arrow A, the slopes 22b and 22b of the hanging parts 22 and 22 become the outer plates 11 and 11, respectively. When the connecting pins 14, 14 projecting to the outer surface of the vehicle are mounted on the tips of the connecting pins 14, they are expanded outward (two-dot chain line in FIG. 3). Therefore, if the cushioning material 20 is pushed forward as it is, the cushioning material 20 can be firmly attached to the chain body 10 by fitting both end portions of the connecting pins 14 and 14 into the pin holes 22a, 22a. Yes (Figure 4). At this time, the cushioning member 20 is configured to commonly cover the pair of outer plates 11, 11 facing each other from above, and the connecting pin 14 projects to the outer surface side of the hanging parts 22, 22. In order not to do so, the protruding length shall be specified.

Similarly, if the other cushioning materials 20, 20, ... Are attached to one side of the chain body 10 (FIG. 2), the length L of each cushioning material 20 is L = 2 po. The cushioning materials 20, 20, ... Are closely attached to each other in the longitudinal direction of the chain body 10 and are mounted in a line, so that a chain with cushioning material can be completed.

[0018] For example, when the chain with the cushioning material is hung on the cylindrical sheave S (Fig. 5), the chain without the cushioning materials 20, 20 ... Can be freely bent, but in the opposite direction. Since the cushioning materials 20, 20, ... Are in close contact with each other, they cannot be bent. Therefore, even if the hydraulic cylinder C is arranged in parallel with the rod C1, it is possible to minimize the possibility that the rod will come into contact with the rod C1 due to vibration, and even if other members are contacted with each other. Since there is the cushioning material 20, 20, ..., The impact at that time can be significantly reduced.

The cushioning material 20 can be easily removed from the chain body 10 by applying a force to open the hanging parts 22, 22 outward, and the unit thereof is the pitch of the chain body 10. It is compatible with po and can be attached to any position in the longitudinal direction of the chain body 10.

In the above description, the chain body 10 can arbitrarily change the number and the arrangement of the inner plates 12, 13, 13, ... Further, the chain body 10 may be a roller chain in which the bushes 15 are combined with the pair of inner plates 12, 12 (FIG. 6), and the bushes 15 are fitted with the rollers 16.

Further, the length L of the cushioning material 20 may be set to L <2 po, and at this time, the chain with cushioning material may be somewhat bent also on the side on which the cushioning materials 20, 20 ... Are mounted. It will be possible.

[0022]

[Effect of the device]

 As described above, according to the present invention, the shock absorbing material is attached to the chain body by mounting the groove-shaped shock absorbing material that commonly covers the pair of outer plates facing each other via the connecting pin. Since it can be attached to the main body of the chain after assembly, rather than being incorporated into the chain body, it can be attached at any position in the longitudinal direction of the chain, and replacement after damage is extremely easy. It has the excellent effect of being

[Brief description of drawings]

FIG. 1 is a perspective view of the overall configuration

2 is an explanatory side view corresponding to the X-ray arrow in FIG.

FIG. 3 is an explanatory view corresponding to a cross section taken along line YY of FIG.

FIG. 4 is a sectional view taken along the line ZZ of FIG.

[Figure 5] Usage status explanatory diagram

FIG. 6 is a view corresponding to FIG. 4 showing another embodiment.

[Explanation of symbols]

 po ... Pitch L ... Length 10 ... Chain body 11 ... Outer plate 14 ... Connection pin 20 ... Cushioning material

Claims (2)

[Scope of utility model registration request] 1. A chain main body and a groove-shaped cushioning material that commonly covers a pair of outer pads of the chain main body, the cushioning material including connecting pins protruding from both ends of the outer plate. A chain with cushioning material, which is detachably attached via the chain. 2. The chain with cushioning material according to claim 1, wherein the cushioning material has a length corresponding to twice the pitch of the chain body.