JP2002128253A - Offset type low noise conveyance chain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an offset type low noise conveyance chain capable of greatly reducing conveyance noise and conveyance vibration and realizing stable article conveyance and having excellent durability. SOLUTION: In this offset type low noise conveyance chain in which a pair of right and left pin holes 21, 21 are formed at a front end of a link body 20 integrated on a rear surface of a slat 10 for loading article, a bush 22 is formed at its rear end, and a connection pin 30 fitted in the pin holes 21, 21 and passing through the bush 22 connects adjacent link bodies 20, 20 mutually in an endless manner, the bush 22 is provided with a cylindrical central part 22a and a pair of right and left collarlike side end parts 22b, 22b branched from an offset position X1 of the link body 20, respectively, to reduce conveyance noise and conveyance vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offset-type low-noise transport chain in which a link body integrated on the back surface of an article loading slat is connected endlessly by a connecting pin. This is to reduce noise generated when ring bodies adjacent in the direction contact with each other.

[0002]

2. Description of the Related Art A conventional offset type transport chain is disclosed in Japanese Utility Model Laid-Open No. 5-040652.
A large number of link portions integrated on the back surface of the top plate portion are connected endlessly by connection pins. In such an offset-type transport chain, the link portion is offset from the front end to the rear end so that the link portion can be cut at one pitch, and a pair of left and right pin holes is formed at the front end of the link portion. And a bush is formed at the rear end of the link portion. Then, the connecting pins are fitted into the pin holes of the adjacent link portions and penetrate the bush, thereby connecting these adjacent link portions endlessly.

[0003]

However, in such an offset-type transfer chain, in order to smoothly bend the adjacent link portions during the transfer travel, the offset bushing and the pin hole between the adjacent link portions are required. A certain gap is provided between them. Therefore, during transport traveling, adjacent link portions relatively move in the axial direction of the connecting pin due to the gap, and the link portions repeatedly generate contact noise and collision noise while contacting and non-contacting each other. There was a problem.

[0004] In particular, in an offset-type transport chain configured for curved transport, the gap is positively increased to allow the horizontal bending of the link portions. Stroke width increases,
In addition to increasing the transfer noise, there is a problem that the link parts are worn or damaged early due to the contact and collision between the link parts, and furthermore, the contact and collision between the link parts cause a slight vibration in the top plate part. As a result, there is a problem that the conveyed article is in an unstable loading state, and the conveyed article is dropped from the article loading surface of the top plate portion, which significantly impairs the commercial value of the conveyed article.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, to greatly reduce the transport noise and the transport vibration, realize a stable article transport, and provide an offset with excellent durability. It is an object of the present invention to provide a low noise transport chain.

[0006]

Therefore, in the offset type low noise transport chain according to the first aspect of the present invention, a pair of left and right pin holes are formed at the front end of a link body integrated with the back surface of the article loading slat. And a bush is formed at a rear end of the link body, and a connecting pin that fits in the pin hole and connects the adjacent link bodies endlessly through the bush is an offset type low noise transport chain. In the above, the bush is provided with a cylindrical central portion branched from an offset position of the link main body and a pair of left and right flange-shaped side ends, thereby solving the above problem.

According to a second aspect of the present invention, there is provided an offset-type low-noise transport chain, wherein a pair of left and right pin holes are formed at a front end of a link body integrated with a back surface of an article loading slat. A bush is formed at a rear end of the offset type low noise transport chain, wherein a link pin that fits into the pin hole and penetrates the bush connects the adjacent link bodies endlessly. The problem has been solved by interposing a vibration-damping / sound-absorbing pad between a pin hole and a bush of the main bodies facing each other.

According to a third aspect of the present invention, there is provided an offset-type low-noise transport chain, wherein a pair of left and right pin holes are formed at a front end of a link body integrated with a back surface of an article loading slat. A bush is formed at a rear end of the offset type low noise transport chain, wherein a link pin that fits into the pin hole and penetrates the bush connects the adjacent link bodies endlessly. The above-mentioned problem has been solved by interposing a buffering projection piece protruding in a cantilever form from the link main body between the pin hole and the bush opposed to each other.

Here, when plastic is used as the material of the link body in the offset type low noise transport chain of the present invention, engineering plastic having higher physical and mechanical properties than general plastic is used. Specifically, polyamide resin with excellent wear resistance, self-lubricating property, impact resistance, and chemical resistance, and polyatasel resin with excellent fatigue and wear resistance, and wear resistance, chemical resistance, heat resistance, and dimensions For example, a polybutylene terephthalate resin having excellent stability is used.

[0010]

First, according to the offset type low noise transport chain of the present invention according to the first aspect, the bush is provided with a cylindrical central portion and a pair of left and right flange-like side ends branched from the offset position of the link body. With this, a slit-like space is formed between the cylindrical central portion and the flange-shaped side end, and the flange-shaped side end is in the form of a cantilevered thin plate. When the pin hole of the link body and the bush contact or collide with each other in the axial direction of the connecting pin, a bending moment acts on the flange-shaped side end to bend elastically toward the slit-shaped space, and the contact or collision is caused by the contact or collision. It provides a so-called impact force alleviating action that significantly reduces the impact energy.

According to the offset-type low-noise transport chain of the second aspect of the present invention, the vibration damping / sound absorbing pad is interposed between the opposing pin holes of the adjacent link bodies and the bush. This prevents direct contact or collision between the pin holes of adjacent link bodies and the bush during transporting, and the impact force associated with the relative movement of the pin holes between adjacent link bodies and the bush in the connecting pin axial direction. Actively suppresses noise and vibration during transport,
It has a so-called vibration damping and sound absorbing effect.

Further, according to the offset-type low-noise transport chain according to the third aspect of the present invention, a cushion protruding from the link main body in a cantilever manner between the opposing pin holes of the adjacent link main bodies and the bush. Interposed between the pin holes of the adjacent link bodies and the bushings during directing and transport, thereby avoiding direct contact and collision between the pin holes of the adjacent link bodies and the bushings. The so-called shock-absorbing effect is achieved, and the connecting position between adjacent link bodies is always set at the center of the connecting pin shaft. In other words, it has a so-called offset correction action.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an offset type low noise transport chain according to the present invention will be described below with reference to the drawings. First, FIGS. 1 and 2 show an embodiment of the offset type low noise transport chain according to the first aspect of the present invention, and FIG. 1 (a) is an external view as viewed from the front side of the chain. 1 (b) is an external view of the chain as viewed from the back side, and FIG. 2 is an enlarged view of one chain pitch in FIG. 1 (b). The offset-type low-noise transport chain of the present embodiment is configured by endlessly connecting a large number of resin link bodies 20 integrally formed on the back surface of the article loading slats 10 with connection pins 30.

The link body 20 made of resin is
A pair of left and right pin holes 21, 21 formed at the front end thereof
And a bush 2 having a bush hole formed at the rear end thereof.
The specific shape from the front end to the rear end is from the front end to the rear end so that the chain can be cut in units of one pitch in the same manner as in the conventional offset transport chain. A shape having a step, that is, an offset shape is employed.

The bush 22 is connected to the link body 20.
Is constituted by a cylindrical central portion 22a and a pair of left and right flange-shaped side ends 22b and 22b branched from the vicinity of an offset position X1 for offsetting the cylindrical central portion 22a and the flange-shaped side end 22b. A slit-shaped space S is formed therebetween, and a flange-shaped side end 22b is formed.
Has a cantilevered thin plate shape.

Further, the connecting pin 30 is fitted and fixed in the pin holes 21, 21 of the adjacent link bodies 20, 20, and has a cylindrical central part 22a and a pair of left and right flange-like side ends 22b. , 22b, the adjacent link bodies 20, 2
0s are connected.

Therefore, in the offset-type low-noise transport chain of the present embodiment, the pin holes 21 and the bushing 22 of the adjacent link bodies 20, 20 contact with each other in the axial direction of the connecting pin during the transport traveling such as the horizontal curved transport, or When a collision occurs, a bending moment acts on the flange-side end 22b to elastically bend toward the slit-shaped space S, and the impact energy accompanying the contact or collision is greatly reduced, so that the transport noise is significantly reduced. In addition to this, it is possible to realize stable article conveyance by elastically absorbing conveyance vibrations, and to achieve excellent durability for a long time.

FIG. 3 shows an embodiment of the offset type low-noise transport chain according to the second aspect of the present invention, and is an external view as viewed from the back side of the chain. The offset-type low-noise transport chain of the present embodiment is configured by endlessly connecting a large number of resin link bodies 20 integrally formed on the back surface of the article loading slats 10 with connection pins 30.

The link body 20 made of resin is
It has a pair of left and right pin holes 21 and 21 formed at its front end and a bush 22 having a bush hole formed at its rear end. For a specific shape from its front end to its rear end, A shape in which a step is provided from the front end to the rear end of the chain so that the chain can be cut off in units of one pitch in the same manner as a conventional offset conveyance chain, so-called,
The offset shape is adopted.

The connecting pins 30 are fitted and fixed in the pin holes 21, 21 of the adjacent link bodies 20, 20, respectively. , 20 are connected to each other.

In this embodiment, a donut-shaped vibration-damping / sound-absorbing pad 40 is interposed between the opposed pin holes 21 and the bushing 22 of the adjacent link bodies 20, 20. The vibration / sound absorbing pad 40 actively absorbs the impact force. In this embodiment, the specific shape of the vibration-damping / sound-absorbing pad 40 is a donut shape. Any other shape may be used as long as it can positively absorb the impact force that may occur therebetween. Regarding the surface configuration of the pad surface arranged on the bush 22 side of the vibration damping / sound absorbing pad 40, the connection pin 3
It is more preferable to adopt a surface configuration in which the bushings 22 of the adjacent link body 20 can smoothly rotate around the connection pin 30, that is, a surface configuration having a small contact area and a small frictional resistance. Further, as a specific material of the vibration damping / sound absorbing pad 40, any material may be used as long as it can positively absorb an impact force, such as a nonwoven fabric or felt.

Therefore, in the offset type low-noise transport chain of this embodiment, the donut-shaped vibration damping / sound absorbing pad 4
By using 0, the vibration-damping / sound absorbing pad 40 avoids direct contact or collision between the pin holes 21 of the adjacent link bodies 20 and 20 and the bushing 22 during transport traveling such as horizontal curved transport. , Adjacent link bodies 20,
Since the pin holes 21 of the bushing 20 and the bushing 22 actively exert vibration damping and sound absorbing effects against impact energy due to relative movement in the axial direction of the connecting pin 30, it is possible to realize quiet article conveyance, and for a long time. Excellent durability can be achieved.

Next, FIG. 4 shows an embodiment of the offset type low noise transport chain according to the third aspect of the present invention, and is an external view as viewed from the back side of the chain. The offset-type low-noise transport chain of the present embodiment is configured by endlessly connecting a large number of resin link bodies 20 integrally formed on the back surface of the article loading slats 10 with connection pins 30.

The link body 20 made of resin is
Like the link body 20 of FIG. 3 described above, the link body 20 includes a pair of left and right pin holes 21 and 21 formed at the front end thereof and a bush 22 having a bush hole formed at the rear end thereof. As for the specific shape from the rear to the rear end, the chain 1
A so-called offset shape is used in which a step is provided from the front end to the rear end so as to be able to cut and connect in pitch units.

The connecting pin 30 is connected to the above-described FIG.
Of the adjacent link bodies 20, 2
The adjacent link main bodies 20 are connected to each other by fitting them into the pin holes 21, 21 and fixing them, and penetrating the bush 22.

In this embodiment, a pair of cushioning projections projecting from the link body 20 in a cantilever manner between the opposing pin holes 21 and the bushings 22 of the adjacent link bodies 20, 20. 50, 50 are interposed. The shock-absorbing projections 50, 50 avoid direct contact or collision between the pin holes 21 of adjacent link bodies 20, 20 and the bushing 22 during transport and traveling.
The impact force caused by the relative movement of the pin holes 21 and the bushing 22 between the adjacent link bodies 20 and 20 in the connecting pin axial direction is elastically buffered to suppress conveyance noise and conveyance vibration. The connection position between the two is always corrected to the center in the connection pin axial direction. As for the specific external shape of the buffering projection 50, in the present embodiment, a barbed projection protruding in a cantilever shape toward the rear of the link main body 20 is employed. Any other shape may be used as long as it can elastically buffer an impact force that can be generated between the pin holes 21 and the bushing 22 between the pins 20, 20. The tip of the buffering projection 50 has a tip form in which the bush 22 of the adjacent link body 20 can smoothly rotate around the connection pin 30 by the connection pin 30, that is, the contact resistance is low. It is more preferable to adopt a tip form having less roundness. Also,
A specific material for forming the buffering projection 50 may be any resin of the same quality as the link body 20 or a softer resin. In short, it is possible to elastically buffer the impact force. Any material that can be used may be used.

Therefore, in the offset-type low-noise transport chain of this embodiment, the use of the buffering projections 50 allows the buffering projections 50 to be adjacent to each other when the transporting travel such as a horizontal bending transport is performed. By avoiding direct contact or collision between the pin holes 21 and the bush 22, the impact force caused by the relative movement in the connection pin axial direction is elastically buffered, and the connection between the adjacent link bodies 20, 20 is performed. Since the position is always corrected to the center in the axial direction of the connecting pin, it is possible to realize low-noise, non-uniform article conveyance, and to achieve excellent durability over a long period of time.

[0028]

The offset-type low-noise transport chain of the present invention can provide the following effects unique to the present invention. First, according to the offset-type low-noise transport chain of the present invention according to claim 1, the bush is provided with a cylindrical central portion and a pair of left and right flange-shaped side end portions branched from the offset position of the link body. When the pin holes and bushings of adjacent link bodies contact or collide with each other in the axial direction of the connecting pin during transport travel, the flange-shaped side end exerts an impact force reducing action. The generated transport noise can be significantly reduced, and the transport vibration can be reduced to realize a stable transport of the articles. In addition, excellent durability can be achieved for a long period of time.

Further, according to the offset type low-noise transport chain of the invention according to the second aspect, the vibration damping / sound absorbing pad is interposed between the bush and the pin hole of the adjacent link bodies facing each other. This prevents direct contact or collision between the pin holes of adjacent link bodies and the bush during transport traveling, and the impact energy associated with the relative movement of the pin holes between adjacent link bodies and the bush in the connecting pin axial direction. Therefore, it is possible to achieve quiet article conveyance and to achieve excellent durability over a long period of time.

Further, according to the offset-type low-noise transport chain of the invention according to the third aspect, a cushion protruding from the link main body in a cantilever manner between the opposing pin holes of the adjacent link main bodies and the bush. Intermediate protrusions prevent direct contact and collision between the pin holes of adjacent link bodies and bushings during transport, and reduce the impact force associated with relative movement in the connection pin axial direction. In addition, the link position between adjacent link bodies is always corrected to the center in the axial direction of the connecting pin, so that it is possible to realize low noise, unbalanced article transfer, and excellent long-term durability. Sex can be achieved.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of an offset type transport chain according to the present invention, wherein (a) is an external view as viewed from the front side of the chain, and (b) is an external view as viewed from the back side of the chain.

FIG. 2 is an enlarged view of one chain pitch in FIG. 1 (b).

FIG. 3 is a diagram showing another embodiment of the offset type transport chain according to the present invention.

FIG. 4 is a view showing still another embodiment of the offset type transport chain according to the present invention.

[Explanation of symbols]

 10 Slats for loading articles 20 Link body 21 Pin hole 22 Bush 22a Cylindrical central part 22b Flange side End 30 ····· Connection pin 40 ···· Vibration suppression / sound absorbing pad 50 ···· Buffering projection X1, X2 ··· Offset position S ···· Slit-like space

Claims (3)

[Claims] 1. A pair of left and right pin holes are formed at a front end of a link main body integrated with a back surface of an article loading slat, and a bush is formed at a rear end of the link main body to fit into the pin hole. In an offset-type low-noise transport chain in which connecting pins penetrating through the bush are connected endlessly to adjacent link bodies, the bushing has a cylindrical central portion branched from an offset position of the link body and left and right sides. An offset-type low-noise transport chain comprising a pair of flange-shaped side ends. 2. A pair of left and right pin holes are formed at a front end of a link body integrated with a back surface of an article loading slat, and a bush is formed at a rear end of the link body to fit into the pin hole. In the offset-type low-noise transport chain in which the connecting pins that penetrate the bush are connected endlessly to each other, the vibration damping is provided between the opposing pin holes of the adjacent link bodies and the bush. -An offset type low-noise transport chain characterized by interposition of a sound-absorbing pad. 3. A pair of left and right pin holes are formed at the front end of the link body integrated with the back surface of the article loading slat, and a bush is formed at the rear end of the link body to fit into the pin hole. In an offset-type low-noise transport chain in which connecting pins penetrating through the bush are connected endlessly to adjacent link bodies, a link body is provided between the opposing pin holes of the adjacent link bodies and a bush. An offset-type low-noise transport chain, characterized by interposing a buffering protruding piece protruding in a cantilever form from above.