JP5046968B2 - Vibration polishing machine for link chains - Google Patents

Description

The present invention relates to a vibration type polishing machine for a link chain that imparts mechanical vibration to a link chain, polishes link inner protrusions and irregularities, and obtains a high fatigue strength of 230 N / mm ² or more.

As a performance required for a chain block, particularly a link chain used for an electric chain block, there is a high fatigue strength characteristic. This characteristic has a wide range of properties such as long life of the equipment and use in a cold region, and a high fatigue strength of, for example, 230 N / mm ² or more is required. This is because when a load is lifted or hung at a high speed, load fluctuations occur in the link chain, and this repeated action causes fatigue cracks from the site where the maximum principal stress of the link chain occurs, which eventually leads to breakage. Are known. Conventionally, in the stress concentration part that causes fatigue failure in the manufacturing process of the link chain, a slight misalignment of the mating surface of the upper and lower molds used when forming the link shape, gaps, etc. are generated As a result, streaks and burrs with a maximum height of 200 μm are generated inside the link. These protrusions dig into the inside of the link due to contact / impact between the links during use, and become a shaved ridge, which becomes the starting point of destruction. This protrusion position coincides with the position where the maximum principal stress generated in the link chain is generated, i.e., the position corresponding to the boundary between the parallel part and the curved part inside each link of the link chain. To remove by processing such as cutting and polishing, a great work is required. Therefore, there is a demand for a link chain having the above-described high fatigue strength, having no protrusions, or reducing protrusions to a minimum. Various proposals have been made to meet this demand.

  For example, Patent Document 1 discloses that as a method of obtaining high fatigue strength, a corrosion resistant / abrasion resistant coating treatment is applied to the inner portion of the shoulder portion of the element ring of the quenched and tempered / tempered link chain. . On the other hand, barrel polishing is conventionally employed as a method for mechanically removing the protrusions and burrs. In this barrel polishing, a polishing grindstone, a workpiece, and other necessary chemicals are charged and sealed in a polishing tank, and the entire polishing tank is rotated at a constant speed by driving a separate motor. By stirring, the protrusions and burrs of the workpiece are removed (rotary barrel polishing machine). Further, as proposed in Patent Document 2, the polishing tank is vibrated at a specific frequency, and a polishing grindstone, a workpiece, and other necessary chemicals are charged into the polishing tank, and a motor provided separately. There is a method in which the entire polishing tank is vibrated by vibration and the polishing tank is stirred to remove protrusions and burrs from the workpiece (vibrating barrel polishing machine). As this vibration source, a commercially available vibration motor, or a method of generating vibration by rotating the counterweight via a motor driving coupling is employed.

  Further, Patent Document 3 discloses that a wire is continuously supplied by supplying a fluid as a polishing medium into a sealed polishing tank in order to remove irregularities or spine distortion on the surface on the wire side that has occurred during molding in the wire finishing process. A vibratory barrel polishing machine is disclosed for polishing.

  The present inventors tried to apply to the link chain by using the above-described conventional manufacturing method. However, the chain length (chain-like shape) has little polishing effect on the inner side of the link that needs to be deburred and withstands the productivity. ) Was stirred in the polishing tank of the vibration barrel polishing machine, and it was found that the chain became humped and the improvement of the polishing effect could not be expected. This is because the polishing tank is normally rotated in one direction, so that the chain can also rotate only in one direction, and the link chain is twisted, so that the degree of freedom of each link chain is impaired. . Therefore, the conventional method has almost no polishing effect inside the link.

  In view of this, the inventors of the present invention, in order to solve the above problems, in Japanese Patent Application No. 2006-237327 (Patent Document 4), in a link chain vibration type polishing machine, a polishing tank is placed on a base via a spring spring. The polishing tank has a structure in which the link chain is carried from one end and pulled by the driving force of the motor at the other end, and a partition wall having a plurality of foldable parts arranged in parallel in the longitudinal direction on the upper surface of the polishing tank is provided. In addition, a vibration type polishing machine for link chains that removes protrusions and burrs on the inside of the link by applying vibration while conveying the link chain between the partition walls and hitting the links to polish them has been proposed.

  However, even in the above-mentioned patent application, it is difficult to set the interval between the partition walls, and the tension due to the frictional resistance is applied at the folded portion. As a result, the degree of freedom is reduced in the link chain, and further, the specific part of the polishing tank As a result, it was found that the link chains were overlapped with each other due to the traffic jam and the polishing effect as expected was not obtained.

JP 2003-221621 A Japanese Patent Application No. 2005-366305 JP 7-136924 A Japanese Patent Application No. 2006-237327

The present invention significantly reduces or eliminates the inner protrusion of the link chain that is generated during link manufacturing only by applying mechanical vibration without using any conventional polishing media, and at least 230 N / mm ² or more. The present invention provides a link chain vibration barrel polishing machine for obtaining a link chain having high fatigue strength.

The present invention has been made to solve the above problems, and the gist thereof is as follows.
(1) In a link chain vibration type polishing machine, a polishing table is placed on a base via a spring spring, and a polishing tank is provided on the upper surface of the polishing table to vibrate and polish the link chain. Conveying sheave device for winding up and sending out the link chain to change the conveying direction of the link chain at both ends in the direction is alternately provided, and a counterweight unit is provided integrally with the polishing tank at the lower part of the polishing tank, The counterweight unit is configured to convert the vibration to a link chain on the polishing tank through a rotating shaft that transmits the rotation of a vibration motor directly attached to the lower part of the polishing tank. Vibration type polishing machine for link chains.
(2) In a vibration type polishing machine for link chains, a polishing table is placed on a base via a spring spring, and a polishing tank for vibrating and polishing the link chain is provided on the upper surface of the polishing table. Provided with a plurality of tapered partition walls in a part or all of the longitudinal direction, and a conveying sheave device for winding up and sending out the link chain at both ends in the longitudinal direction of the polishing tank in order to change the conveying direction of the link chain Provided alternately, a counterweight unit is provided integrally with the polishing tank at the lower part of the polishing tank, and this counterweight unit is connected to the lower part of the polishing tank via a rotating shaft that transmits the rotation of a vibration motor. A vibration type polishing machine for a link chain, wherein the vibration is applied to a link chain on a polishing tank by converting into vibration.
(3) In a link chain vibration type polishing machine, a polishing table is placed on a base via a spring spring, and a polishing tank for vibration polishing the link chain is provided on the upper surface of the polishing table. A plurality of tapered partition walls are provided in the entire longitudinal direction, the wide and narrow mouth portions of the link chain conveyance path partitioned by each tapered partition wall are alternately arranged, and the wide mouth portions are dropped from the link chain. The side and narrow mouth part is the tension side of the link chain, and the conveyor sheave is used to wind up and send out the link chain to change the transport direction of the link chain at both ends in the longitudinal direction of the polishing tank near the wide mouth part and the narrow mouth part. The counter weight unit is provided integrally with the polishing table at the lower part of the polishing table, and the counter weight unit is directly attached to the lower part of the polishing table. Oscillating sander link chain which is characterized by being configured so as to convert the vibrations through the rotary shaft to impart vibration to the link chain on the polishing vessel for transmitting the rotation of the attached vibration motor.
(4) The wide opening portion of the link chain conveyance path defined by the plurality of tapered partition walls provided on the upper surface of the polishing table is 5 to 20 times the link outer width, and the narrow opening portion is 1. The vibration type polishing machine for link chains according to (3), characterized in that the number is 0 times or more.
(5) Continuous polishing by disposing a link chain transport sprocket at the link chain carry-in port provided at one end of the polishing table and a link chain take-up sprocket at the link chain carry-out port provided at the other end of the polishing table. The link chain vibration polishing machine according to any one of (1) to (4), characterized in that:
(6) The vibration applied to the polishing table has a vibration frequency of 20 to 30 Hz and an amplitude of 2 to 6 mm, and the link chain vibration type according to any one of (1) to (5) Polishing machine.
(7) The link chain vibration according to any one of (1) to (6), wherein a conveyance speed of the link chain conveyed on the polishing table is 0.8 to 3 m / min. Type barrel polishing machine.
(8) The link chain polished by the polishing table is any one of a raw link chain before heat treatment, a link chain after heat treatment, or a link chain subjected to plating treatment. The vibration type barrel polishing machine for link chains according to any one of items 1).

  The vibration type polishing machine for a link chain according to the present invention polishes the fine protrusions, irregularities, etc. inside the link generated during link chain manufacture by applying mechanical vibration without being limited by the length of the link chain. The above-mentioned protrusions, irregularities, etc. are remarkably reduced, for example, a high-strength link chain having an excellent surface state of 50 μm or less, preferably 10 μm or less can be removed efficiently at low cost, and a high-quality link chain is provided In addition, it is possible to improve the vibration processing efficiency without overlapping the link chain on the polishing table, and to greatly reduce the equipment cost.

In the production of a link chain, when a low carbon alloy steel wire is formed into a raw link shape of a link chain, a mandrel composed of an upper mold and a lower mold is overlapped and formed into a link, and then the end faces are welded to form. During this molding process, a slight misalignment of the mating surface of the mandrel, a gap, and the like cause a protrusion or burr having a maximum height of 200 μm at the boundary between the parallel portion and the curved portion inside the link. These protrusions and burrs are still slightly deformed even after heat treatment. If left as they are, they become a stress concentration source during use and become the starting point of destruction. If breakage occurs during use, a serious accident may result. It might be. Therefore, in order to obtain a link chain with high fatigue strength (230 N / mm ² or more) that has recently been highly demanded, it is urgent to remove and reduce such protrusions, irregularities, burrs, and the like.

  FIG. 4 shows the structure of a conventional commercially available vibration barrel polishing machine. In this polishing machine, a polishing table 1 is mounted on a support column of a spring spring 3 on a base, and a counterweight unit 2 attached integrally with the polishing table 1 is provided below the polishing table 1. . The counterweight unit 2 is configured to convert the rotational force of a separately provided motor 4 into vibration energy via a coupling 5 to apply vibration to the polishing table 1. In addition to the workpiece (link chain C), the polishing media K such as a grindstone and a polishing agent is put into the polishing table 1, and the polishing tank is stirred by rotating the whole in one direction. Is a batch unit process. However, in this polishing apparatus, since the polishing tank is rotated in one direction, the chain can only be rotated in one direction, and the link chain is twisted, so that the degree of freedom of each link chain is impaired. There is a problem that there is substantially no polishing effect.

  In order to reduce the above-mentioned protrusions or burrs easily or quickly without using a complicated and expensive polishing medium and fluid as in the past, the present inventors have used a commercially available vibration polishing machine. By applying a specific frequency to the link chain placed on the polishing table with a motor, the link is freely rubbed, collided, and struck so that protrusions and burrs on the inside of the link are marked. A patent application was filed in Japanese Patent Application No. 2003-237327 (Patent Document 4) to reduce this.

  The specific contents are as shown in FIGS. 1 and 2. FIG. 1 is a cross-sectional view of a vibration type polishing machine for link chains according to the present invention, and FIG. 2 is a plan view of a polishing table. In FIG. 1A, a polishing table 1 is placed on a base via a spring spring 3 or a hydraulic actuator, and a counterweight unit 2 is provided integrally with the polishing table at the bottom of the polishing table. The counterweight unit 2 is configured to apply vibration to the polishing table 1 by converting it into vibration via a rotating shaft 5 that transmits the rotation of the vibration motor 4. Further, in the present invention, as shown in FIG. 1B, the vibration motor 4 as a vibration source is directly attached to the lower part of the polishing table 1 to effectively transmit the vibration from the vibration motor 4 to the polishing table 1. It is more preferable from the viewpoint of the structure of the polishing machine. Furthermore, in the present invention, as another embodiment shown in FIG. 1, it is conceivable that production efficiency can be doubled by stacking a plurality of polishing stands in a vertical direction with one vibration motor.

  Further, as shown in FIGS. 2 (a) and 2 (b), the polishing table in Patent Document 4 simply puts the link chain on the polishing tank almost linearly in the case of a short link chain of several meters or less. However, when polishing a long link chain, for example, several tens of meters (in the present invention, a link chain of more than 100 m can be continuously polished), the link chains C conveyed on the polishing table 1 are arranged in a plurality of rows. The plurality of linear partition walls 6 that are arranged in parallel in the longitudinal direction (conveying direction) of the polishing table are partitioned so that the adjacent conveying passages can be secured with a certain width, and the links of the link chain are connected to each other. Are continuously conveyed and polished while being rubbed against each other and polished. On the polishing table, the surface of the metal plate is left as it is or a thin elastic body is laid. A feed roller 7 or a conveying sheave 10 is attached to the link chain folding point of the partition wall 6 so that the conveyance is smooth and the link chain is not wrinkled. Further, a link chain carrying sprocket 8 is provided at the link chain carry-in port at the end of the polishing table 1 in order to continuously supply the link chain C to the polishing table, and a link chain carry-out port at the other end of the polishing table 1. In order to continuously wind or take in the link chain C, a link chain carrying sprocket 9 is attached.

However, the proposal of Patent Document 4 still has some problems. For example, 1) In a plurality of parallel partition walls provided on the polishing table, the link chain to be processed is turned back by a roller provided at the developing part at the front end of each partition wall, and is conveyed by a transport motor on one side or a transport sheave. Because of the pulling structure, tension is applied by the frictional resistance of the folded portion other than the link chain dropping portion from the conveying sheave, and the link chain has no freedom and the polishing effect is reduced.
2) The width of the conveyance path between the partition walls is narrow, and the link chain overlaps and stays at the drop point of the sprocket or conveyance sheave, so that the polishing effect is not improved.

Therefore, as a result of intensive studies to improve the polishing effect, the present inventors can improve the polishing effect without providing any partition wall on the polishing tank 1 as shown in FIG. It was. The specific configuration is shown in FIGS. FIG. 3 is a plan view of a polishing tank according to the present invention, and FIGS. 4A and 4B are perspective views of the polishing tank during a polishing operation. As shown in FIGS. 3, 4 (a) and 4 (b), feed rollers 7 and transport sheaves 10 arranged in a staggered manner are attached to the respective longitudinal ends of the polishing tank 1, and the feed rollers 7 or transport When the sheave 10 has the function of winding and winding the link chain, and one of the feeding rollers 7 or the conveying sheave 10 performs the winding function, the link chain is wound with a slight tension, and the other of the opposite chains is wound. A link chain is overlapped and dropped immediately below the feed roller 7 or the conveying sheave 10 to provide a link chain reservoir T, and a plurality of these are continuously provided in a direction perpendicular to the longitudinal direction of the polishing tank. By oscillating the whole, each link hits each other at the overlapping part on the link chain drop side, and the inside of each link manufactured by a mandrel with upper and lower molds Caused, it was found that may reduce burrs.
Furthermore, in order to further improve the polishing effect in the polishing tank, the inventors set the plurality of partition walls provided on the polishing tank as tapered partition walls instead of in parallel, and each tapered partition wall is The wide mouth and narrow mouth of the transport path partitioned by the are arranged alternately, the wide mouth is the drop side of the link chain, and the narrow mouth is the pull side of the link chain, greatly improving the polishing time and polishing effect. I found out. The specific configuration is shown in FIGS. 5, 6A, and 6B. FIG. 5 is a plan view of a polishing table having a tapered partition wall according to the present invention, FIG. 6 (a) is a perspective view thereof, and FIG. 5 (b) is an enlarged perspective view of a polishing tank at a link chain dropping portion. Next, the reason why the tapered partition wall is provided on the polishing table according to the present invention will be described.

  As described above, since the diameter of the conveying sheave is determined in a plurality of parallel partition walls on the polishing tank, the interval between the partition walls (conveyance passage width) cannot be increased, and therefore the falling side of the conveying sheave Then, the link chain accumulation part more than expected is formed and the degree of freedom of the link chain is lost, that is, the load of the link chain falling one after another increases at the lower part of the link chain accumulation part. On the other hand, the winding side of the conveying sheave is at the same speed as the dropping side, so from the situation at the dropping part, it is always pulled, including the folded part at the tip of the partition wall, and tension is applied to the link chain. Is in a state. Under such circumstances, the link chain on the transport path is in a substantially straight state, the processing amount per unit area is reduced, and the phenomenon that the polishing effect is not improved occurs.

  In view of the above situation, the present inventors have expanded the processing area of the conveyance path, and in order to eliminate the unnecessary overlap of the link chain at the falling part, the link chain dropped by expanding the area of the dropping part The fall area on the transport path is increased, and as a result, the degree of freedom at the drop part of the link chain is expanded, and the polishing effect is improved. On the other hand, on the link chain winding side, the conveying sheave is wound up at a constant rotational speed (a constant tension is applied), so that a large amount of conveying passage area is not necessary. Largely, the conveyance path area may be narrowed on the winding side, which means that the conveyance path only needs to be tapered from the winding side to the falling part. The amount of the link chain to be processed on the polishing tank can be remarkably increased as compared with the conventional method.In addition, the link chain conveyance path defined by the plurality of tapered partition walls has a size of the link chain to be polished. In the case of 6.0 mm, it is preferable that the tapered wide mouth portion is 13 times the link outer width and the narrow mouth portion is 1.1 times the link outer width.

  In addition, in the vicinity of the wide-mouthed and narrow-mouthed ends of the tapered partition wall, a conveyor sheave for winding up and sending out the link chain at both ends in the longitudinal direction of the polishing tank in order to change the conveying direction of the link chain (by a motor) The number of link chains that accumulate in the transport passages in each partition wall can be controlled at any transport speed with each transport sheave. Therefore, there is an advantage that the conveyance efficiency is doubled.

  As described above, in the present invention, the link chain is transported while receiving vibration on the transport path. The transport speed exceeds the conventional upper limit speed of 1 m / min and is a maximum of 3 m / min. It is conveyed at 2 mm / min to 2.5 m / min, preferably 2 m / min at 6.0 mm.

  The vibration conditions given to the link chain on the polishing table 1 are such that the vibration frequency and the collision energy between the link chains increase as the vibration frequency increases and the amplitude of the polishing table increases. Therefore, it is preferable that the vibration frequency is 20 to 30 Hz, preferably 20 to 25 Hz, and the amplitude is 2 to 6 mm. The polishing time depends on the length of the link chain, the size of the polishing table, the amount of link chains arranged, and the transport speed of the link chain, but the polishing time is about 1 hour compared to the conventional 1.5 to 4 hours. Processing can be performed. Further, the link chain polished in the present invention can be polished either before quenching / tempering heat treatment, after heat treatment, or after surface treatment (electroless plating).

  Next, an actual polishing operation will be described.

  First, as shown in FIGS. 3 to 7, a long link chain C (initially a dummy link chain) has a link chain inlet at one end of a polishing tank, A link chain carry-out port 9 is provided at the other end of the polishing table, and a long link chain is continuously subjected to vibration polishing processing on the polishing table. First, the end of the dummy chain is connected to the end of the link chain to be polished as a product at the link chain carry-in port 8, and then the motor is driven to drive the polishing table 1 through the counterweight unit 2 with a vibration frequency of 20 to 30 Hz. Oscillate with an amplitude of 2 to 6 mm. Further, the link chain is transported at a transport speed [2 m / min] so that the polishing processing time becomes the target one hour. 3 or 4, or on the polishing table 1 as shown in FIGS. 5 to 7, it is divided by a plurality of short or long tapered partition walls 6... 6 n. Since the tapered conveying passages 6 ′... 6′n are provided, the link chain is conveyed through the tapered conveying passages 6 ′. It is preferable to provide the taper-shaped partition wall, in other words, the taper-shaped transport passage in 10 to 20 strips, for example, in the case of a link chain diameter of 6 mm, 12 to 14 strips. The link chain on the taper-shaped conveyance path is struck between the link chains by the applied vibration, and the protrusions and burrs on the inside of the link disappear due to the mutual struck, and a maximum of 200 μm protrusions and irregularities before polishing What was burr is reduced to 60 μm after polishing, and to 30 μm or less on average, so that a smooth surface can be obtained.

  Conveyance for winding up and sending out the link chain to change the conveyance direction of the link chain at both ends in the longitudinal direction of the polishing table in the vicinity of the wide mouth 6-1 and narrow mouth 6-2 ends of each tapered partition wall Sheaves 10... 10 'are provided respectively (the number of revolutions can be controlled independently by rotational drive by a motor). A link chain is deposited on the tapered wide mouth portion 6-1 as a drop portion of the link chain sent by the conveying sheave, and a link chain polished by the conveying sheave is attached to the tapered narrow mouth portion 6-2. The part to be rolled up. This is because the polishing amount increases as the polishing area is increased as described above. On the other hand, the link chain is directed toward the winding side in order to wind up the polished link chain at a constant speed at the winding part. Therefore, since the space is not necessary as much as it is in a straight line state, the taper-shaped transport path may be a taper-shaped transport path from the dropping portion toward the winding portion. Further, in the present invention, as shown in FIG. 7, a short partition wall 6 ″ to a part of the end portion in the longitudinal direction and only the weight portion of the link chain is provided without providing a partition in the entire longitudinal direction on the polishing tank. The same effect can be obtained even if 6n ″ is inclined or linearly provided.

  A link chain having a diameter of 6 mm (no plating) was placed on a polishing table having 14 tapered partition walls (tapered conveyance path) in an amount of 100 kg in the 14 taper conveyance path and polished under the conditions shown in Table 1. The results are also shown in Table 1.

  As can be seen from the results in Table 1, with the polishing machine according to the present invention, there is no overlap of the link chain on the polishing table even at the same frequency, and the degree of freedom of the link chain is increased by taking a large processing area for vibration polishing. The hitting of the link chains is promoted, and as a result, the amplitude is large, the feeding speed can be increased, and the processing time can be halved. Also, the greatest advantage is that the polishing effect [fatigue strength] is further improved and the fatigue strength is improved by about 50% for the conventional non-polishing and about 3-5% for the parallel partition wall polishing machine. We were able to plan.

(A) is a schematic front view of the vibration polishing machine for link chains of this invention, (b) is a schematic front view of the vibration polishing machine for link chains of another aspect of this invention. (A), (b) is a top view of the grinding | polishing stand of the vibration type polishing machine for link chains which has the grinding | polishing stand in which the conventional partition wall paralleled. The schematic plan view of the polishing stand of the vibration type polishing machine for link chains of the present invention. (A) is a perspective view of FIG. 3, (b) is an enlarged perspective view of a link chain dropping part. The schematic top view of the vibration type polishing stand for link chains of another mode of the present invention. (A) is a perspective view of FIG. 5, (b) is an enlarged perspective view of a link chain dropping part. The schematic plan view of the vibration polishing stand for link chains of another another aspect of this invention. It is a schematic front view of the conventional vibration type grinder for commercially available link chains.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Polishing stand 2 Counterweight unit 3 Spring spring or hydraulic actuator 4 Vibration motor 5 Coupling 6 Linear parallel partition wall 6 '... 6'n Tapered partition wall 6''...6'' n Tapered conveying path 6-1 Tapered wide opening 6-2 Tapered narrow opening 7 Rotating roller 8 Link chain carrying sheave 9 Link chain carrying sheave 10 Conveying sheave c Link chain T Weight part

Claims (8)

  In a vibration polishing machine for a link chain, a polishing table is placed on a base via a spring spring, and a polishing tank is provided on the upper surface of the polishing table to vibrate and polish the link chain. In order to change the transport direction of the link chain, a conveyor sheave device for alternately winding and sending the link chain is provided, and a counterweight unit is provided integrally with the polishing tank at the lower part of the polishing tank. A link chain characterized in that the unit is configured to convert vibration into a link chain on the polishing tank through a rotating shaft that transmits the rotation of a vibration motor directly attached to the lower part of the polishing tank. Vibratory polishing machine.   In the vibration polishing machine for link chains, a polishing table is placed on a base via a spring spring, and a polishing tank is provided on the upper surface of the polishing table to vibrate and polish the link chain in the longitudinal direction of the polishing table. A plurality of tapered partition walls are provided in part or in whole, and conveyor sheave devices are alternately provided at both ends in the longitudinal direction of the polishing tank to wind up and send out the link chain in order to change the conveyance direction of the link chain. A counterweight unit is provided integrally with the polishing tank at the lower part of the polishing tank, and this counterweight unit converts the vibration into a vibration via a rotating shaft that transmits the rotation of a vibration motor directly attached to the lower part of the polishing tank. Then, a vibration type polishing machine for a link chain, which is configured to apply vibration to the link chain on the polishing tank.   In the vibration polishing machine for link chains, a polishing table is placed on a base via a spring spring, and a polishing tank for vibrating and polishing the link chain is provided on the upper surface of the polishing table. A plurality of tapered partition walls are provided in all, and the wide and narrow mouth portions of the link chain conveyance path partitioned by each tapered partition wall are alternately arranged, and the wide mouth portion is arranged on the drop side of the link chain, narrowly. The mouth is the tension side of the link chain, and the conveyor sheave device for winding up and feeding the link chain to change the transport direction of the link chain at both ends in the longitudinal direction of the polishing tank in the vicinity of the wide mouth and narrow mouth A counterweight unit is provided integrally with the polishing table at the lower part of the polishing table, and this counterweight unit is directly attached to the lower part of the polishing table. Oscillating sander link chain which is characterized by being configured to impart vibration to the link chain on the polishing bath by converting the vibration via a rotary shaft for transmitting the rotation of the vibration motor. The wide mouth part of the link chain conveyance path defined by a plurality of tapered partition walls provided on the upper surface of the polishing table is 5 to 20 times the outer link width, and the narrow part is 1.0 or more times the outer link width. The vibration type polishing machine for a link chain according to claim 3, wherein:   Enables continuous polishing by installing a link chain carrying sprocket at the link chain carry-in port provided at one end of the polishing tank and a link chain take-up sprocket at the link chain carry-out port provided at the other end of the polishing table. The vibration type polishing machine for a link chain according to any one of claims 1 to 4, wherein the vibration polishing machine is for a link chain.   The vibration applied to the polishing tank has a vibration frequency of 20 to 30 Hz and an amplitude of 2 to 6 mm, and the link chain vibration type polishing machine according to any one of claims 1 to 5.   The link barrel vibrating barrel polishing machine according to any one of claims 1 to 6, wherein a conveying speed of the link chain conveyed on the polishing table is 0.8 to 3 m / min.   The link chain polished by the polishing table is any one of a raw link chain before heat treatment, a link chain after heat treatment, or a link chain subjected to plating. Vibrating barrel polisher for link chains as described in the paragraph.

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