JP2021075345A - Transport device - Google Patents

Abstract

To provide a transport device that can improve the durability of a linear member and suppress the disengagement of the linear member.SOLUTION: In a transport device 1, a part of a linear member 12 fixed to a transport portion 11 is wound around a drive rotor 13, and the transport portion 11 moves in a reciprocating manner by the forward or reverse rotation of the drive rotor 13. Tension adjustment portions are installed between the drive rotor 13 and the transport portion 11, both on the side where the linear member 12 is wound and on the side where it is unrolled, respectively. A tension adjustment portion 20 has, for example, a self-weighting action member 21 that contacts the linear member 12 from above and applies a force in a pushing down direction to the linear member 12 due to its own weight and a self-weight support member 22 that supports the self-weighting action member 21 so that it can be displaced at least in the vertical direction according to the tension of the linear member 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a transport device that moves a transport unit using a linear member.

Conventionally, a transfer device that uses a linear member such as a wire or a string as a transmission medium for a driving force to move a transfer unit has been widely used. In this transport device, since a linear member such as a wire or a string is used as a transmission medium of the driving force, it can be driven with a lower thrust than when a chain is used, and the operator's finger should be able to drive it. It has high safety without getting caught even if it is touched. On the other hand, in this transport device, it is necessary to maintain the tension of the linear member in order to transmit the driving force. For example, the linear member is pulled in one direction by an urging member such as a spring to follow a temporary slack. (See, for example, Patent Document 1).

Japanese Patent Application No. 2018-24520

However, for example, when the linear member 112 is pulled in one direction by using the spring 120 on both sides of the drive rotating body 113 as shown in FIG. 3, for example, as shown in FIG. 4, the linear member 112 is conveyed. On the side where the linear member 112 is stretched at the start, that is, on the side where the linear member 112 is wound by the rotation of the drive rotating body 113, the spring 120 is stretched and the tension is increased as compared with the time when the linear member 112 is stopped. There was a problem that a large load was applied and the durability was poor. On the contrary, on the side where the linear member 112 loosens at the start of transportation, that is, on the side where the linear member 112 is fed out by the rotation of the drive rotating body 113, the spring 120 contracts and the tension decreases as compared with the stop, so that the slack occurs. There is also a problem that the absorption is delayed and the linear member 112 may come off. In addition, in FIG. 3 and FIG. 4, the component corresponding to the transport device 1 of the embodiment of the present invention is represented by adding a code obtained by adding 100 to the code used in the embodiment of the present invention. ..

The present invention has been made based on such a problem, and an object of the present invention is to provide a transport device capable of improving the durability of a linear member and suppressing the detachment of the linear member. To do.

In the transport device of the present invention, a part of the linear member fixed to the movable transport portion is wound around the drive rotating body, and the linear member is wound or wound by rotating the drive rotating body in the forward or reverse direction. The transport unit is reciprocated by being fed out, and is arranged between the drive rotating body and the transport unit on both the winding side and the feeding side, respectively, and is linear due to its own weight. It is provided with a tension adjusting unit that applies a force in the direction of pushing down the member.

According to the present invention, since a force in the pushing direction is applied to the linear member by its own weight, the tension of the linear member is adjusted with a constant force regardless of the tension and slack state of the linear member. be able to. Therefore, even if the linear member is stretched on the side where the linear member is wound at the start of transportation, the magnitude of the force applied to the linear member does not increase as in the case of using a spring. Therefore, it is possible to suppress a large load from being applied to the linear member, and it is possible to improve the durability of the linear member. Further, even if the linear member is loosened on the side where the linear member is fed out at the start of transportation, the magnitude of the force applied to the linear member does not become smaller than when the spring is used. , The slack can be absorbed quickly, and the detachment of the linear member can be suppressed.

It is a figure which shows the structure of the transport device which concerns on one Embodiment of this invention. It is a figure for demonstrating the operation of the transfer apparatus shown in FIG. It is a figure which shows the structure of the conventional transport device. It is a figure for demonstrating the operation of the conventional transfer apparatus shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the configuration of the transport device 1 according to the embodiment of the present invention. FIG. 2 illustrates the operation of the transport device 1. In this transport device 1, a part of the linear member 12 fixed to the movable transport portion 11 is wound around the drive rotating body 13, and the linear member 12 rotates in the forward or reverse direction. The transport unit 11 reciprocates when it is wound or unwound.

The transport unit 11 is, for example, for mounting and transporting a work. The transport unit 11 may have any configuration as long as it can be moved, and in the present embodiment, it is configured by, for example, a carriage. The linear member 12 transmits the driving force of the driving rotating body 13, and is composed of, for example, a wire or a string. For example, both ends of the linear member 12 are fixed to the transport portion 11, and a part between both ends is wound around the drive rotating body 13. The drive rotating body 13 is composed of, for example, a drive pulley connected to a drive source 14 such as a motor, and is configured to rotate forward or reverse by the drive source 14.

The transport device 1 also includes, for example, a pair of transport path guide members 15 for guiding the linear member 12 and forming a transport path in which the transport unit 11 reciprocates. The pair of transport path guide members 15 are each composed of, for example, rotatably arranged driven pulleys, and are arranged at intervals. For example, the linear member 12 is hung on the pair of transport path guide members 15 so as to form an annular shape. A transport unit 11 is arranged on one side (one side between the pair of transport path guide members 15) of the linear member 11 spanned by the pair of transport path guide members 15, and the other side (pair of transport path guides 15). The drive rotating body 13 is arranged on the other side between the members 15. As a result, in the transport device 1, when the drive rotating body 13 rotates, the linear member 12 is wound up on one side and unwound on the other side to move between the pair of transport path guide members 15, and the transport unit 11 is accompanied by this. Is guided to move between the pair of transport path guide members 15.

The transport device 1 further includes a tension adjusting unit 20 that adjusts the tension of the linear member 12 spanned between the pair of transport path guide members 15. The tension adjusting unit 20 is arranged between the drive rotating body 13 and the transport unit 11 on both the winding side and the feeding side of the linear member 12, and is displaced according to the tension of the linear member 12. However, it is configured to apply a force in the downward direction with respect to the linear member 12 by its own weight. As a result, a force is applied to the linear member 12 in the direction of pushing down by using its own weight, and the tension of the linear member 12 can be adjusted with a constant force regardless of the tension and slack state of the linear member 12. It has become. Therefore, on the side where the linear member 12 is wound at the start of transportation, even if the linear member 12 is stretched more than when it is stopped, the magnitude of the force applied to the linear member 12 is different from that when a spring is used. Is not large, so that it is possible to prevent a large load from being applied to the linear member 12. Further, on the side where the linear member 12 is fed out at the start of transportation, even if the linear member 12 is in a looser state than when it is stopped, the magnitude of the force applied to the linear member 12 is different from that in the case of using a spring. Since it is small, it can absorb slack quickly.

The tension adjusting member 20 may be arranged anywhere as long as it is between the drive rotating body 13 and the transport portion 11, but it is preferable to dispose of the tension adjusting member 20 between the drive rotating body 13 and the transport path guide member 15. .. That is, it is preferable to dispose of the linear members 12 on both sides of the drive rotating body 13 on the side where the drive rotating bodies 13 spanned by the pair of transport path guide members 15 are arranged. This is because it is possible to quickly respond to fluctuations in the tension of the linear member 12 due to the rotation of the drive rotating body 13.

Specifically, for example, the tension adjusting unit 20 has a self-weight acting member 21 that comes into contact with the linear member 12 from above and applies a force in a direction of pushing down the linear member 12 by its own weight, and the self-weight acting member 21. It is preferable to have a self-weight supporting member 22 that supports the linear member 12 so as to be displaceable at least in the vertical direction according to the tension of the linear member 12.

The self-weight acting member 21 is preferably composed of, for example, a driven pulley rotatably arranged with respect to the self-weight supporting member 22. The weight of the self-weight acting member 21 varies depending on the length and tension of the linear member 12, but is preferably about 1 kg to 2 kg, for example. The self-weight supporting member 22 may have, for example, a linear motion structure that supports the self-weight acting member 21 so as to be displaceable in the vertical direction by a slide or the like, or the self-weight acting member 21 is rotatably arranged at one end and the other end. A rotary structure may be formed in which the portions are rotatably arranged at a fixed position to rotatably support the self-weight acting member 21 around the fixed position. Note that FIGS. 1 and 2 show the case of a rotating structure.

The tension adjusting unit 20 also preferably has lower support members 23 that support the linear member 12 from below on both sides of the self-weight acting member 21. This is because the self-weight acting member 21 can act stably. The lower support member 23 is composed of, for example, a driven pulley rotatably arranged, and is arranged so as to come into contact with the linear member 12 from below.

Although not shown, the transport device 1 may include an auxiliary member including a driven pulley for guiding the linear member 12 and stably supporting the linear member 12.

This transport device 1 is used, for example, as follows. First, a pair of transport path guide members 15 are arranged so as to form a transport path at a target position, and a linear member 12 is hung on the pair of transport path guide members 15 to form a pair of transport path guide members. The transport portion 11 is arranged on one side between the 15s, the drive rotating body 13 is arranged on the other side, and a part of the linear member 12 is wound around the drive rotating body 13. When the drive source 14 is connected to the drive rotating body 13 and the drive rotating body 13 is rotated forward or reverse, the linear member 12 is wound up on one side and unwound on the other side to form a pair of transport path guide members 15. The transport unit 11 is guided to move between the pair of transport path guide members 15. As a result, the work can be placed on the transport unit 11 and the work can be transported from one of the transport paths to the other.

At that time, since the transport device 1 includes the tension adjusting unit 20, for example, when the linear member 12 is wound on the side where the linear member 12 is wound at the start of transport, the linear member 12 is stretched more than when it is stopped. The self-weight acting member 21 moves upward according to the tension of the linear member 12, and the self-weight acting member 21 is applied to the linear member 12. Further, on the side where the linear member 12 is fed out at the start of transportation, when the linear member 12 is in a looser state than when it is stopped, the self-weight acting member 21 moves downward according to the tension of the linear member 12, and the wire The weight of the self-weight acting member 21 is applied to the shape member 12. As a result, the force applied to the linear member 12 becomes constant regardless of the tension and slack state of the linear member 12, and it is possible to suppress a large load from being applied to the linear member 12 and to absorb the slack quickly. ..

As described above, according to the present embodiment, since the force in the pushing direction is applied to the linear member 12 by its own weight, the wire is applied with a constant force regardless of the tension and slack state of the linear member 12. The tension of the shape member 12 can be adjusted. Therefore, on the side where the linear member 12 is wound at the start of transportation, even if the linear member 12 is stretched more than when it is stopped, the magnitude of the force applied to the linear member 12 is different from that when a spring is used. Is not large, so that it is possible to prevent a large load from being applied to the linear member 12, and it is possible to improve the durability of the linear member 12. Further, on the side where the linear member 12 is fed out at the start of transportation, even if the linear member 12 is in a looser state than when it is stopped, the magnitude of the force applied to the linear member 12 is different from that in the case of using a spring. Since it does not become smaller, the slack can be absorbed quickly, and the detachment of the linear member 12 can be suppressed.

The transport device 1 according to the present embodiment and the conventional transport device 100 (see FIG. 3) for adjusting the tension by using a spring are reciprocated with the transport portions 11 and 111, respectively, and the linear member 12 is moved. , 112 was examined for deterioration. The transport device 1 of the present embodiment and the conventional transport device 100 have the same configuration except that the configuration of the portion for adjusting the tension is different. As a result, in the conventional transfer device 100, the linear member 112 has deteriorated and the number of reciprocating movements requiring replacement is about 90,000, whereas in the transfer device 1 of the present embodiment, the number of reciprocating movements is about 90,000. The linear member 12 deteriorated, and the reciprocating movement that required replacement was about 450,000 times. That is, according to the transport device 1 of the present embodiment, the durability can be significantly improved.

Although the present invention has been described above with reference to embodiments, the present invention is not limited to the above embodiments and can be variously modified. For example, in the above-described embodiment, each component of the transport device 1 has been specifically described, but the specific configuration of each component may be different. Further, it is not necessary to include all of the above-mentioned components, and other components may be provided.

For example, in the above embodiment, in FIGS. 1 and 2, a pair of transport path guide members 15 are arranged upright (with the rotation axis horizontal) and linearly hung on the pair of transport path guide members 15. Although the case where the other side is located on one side of the member 12, the pair of transport path guide members 15 are arranged sideways (with the rotation axis vertical) and hung on the pair of transport path guide members 15. One side and the other side of the linear member 12 may be arranged side by side in the horizontal direction. Further, there may be a height difference between the positions of the pair of transport path guide members 15, and even if there is a height difference between one side and the other side of the linear member 12 spanned by the pair of transport path guide members 15. Good. According to the present invention, since an appropriate tension can be applied to the linear member 12, it can be smoothly operated even if there is a height difference.

Further, in the above embodiment, in FIGS. 1 and 2, a case where one side and the other side of the linear member 12 spanned by the pair of transport path guide members 15 are arranged substantially in parallel is shown. Depending on the installation location and the like, an auxiliary member including a driven pulley that guides the linear member 12 may be arranged between the pair of transport path guiding members 15 to guide the linear member 12 to an arbitrary shape. ..

In addition, in the above-described embodiment, the case where the transport unit 11 is configured by a trolley has been described, but it has a mounting table on which the work is mounted and a moving support section that supports the mounting table so as to be reciprocally movable. It may be configured.

1 ... Conveying device, 11 ... Conveying part, 12 ... Linear member, 13 ... Drive rotating body, 14 ... Drive source, 15 ... Conveying path guide member, 20 ... Tension adjusting part, 21 ... Self-weight acting member, 22 ... Self-weight support Member, 23 ... Lower support member

Claims (2)

A part of the linear member fixed to the movable transport portion is wound around the drive rotating body, and the linear member is wound or unwound by the forward rotation or the reverse rotation of the drive rotating body to carry the transport. It is a transport device that moves the unit back and forth.
Between the drive rotating body and the transport portion, the linear member is disposed on both the winding side and the unwinding side, respectively, and a force in a pushing direction is applied to the linear member by its own weight. A transport device characterized by having a tension adjusting unit. The tension adjusting unit is
A self-weight acting member that comes into contact with the linear member from above and applies a force in a direction of pushing down the linear member by its own weight.
A self-weight supporting member that supports the self-weight acting member so as to be displaceable at least in the vertical direction according to the tension of the linear member.
The transport device according to claim 1, further comprising lower support members that support the linear member from below on both sides of the self-weight acting member.

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