JPH07214199A - Elevating device of loader - Google Patents

Abstract

PURPOSE:To enable lowering of the height of a device, to freely adjust an elevating position with a simple constitution, to reduce the cost and to stably carry a work even in the case of holding the work at the leaned position. CONSTITUTION:In a loader 1 hanging down an elevating frame 5 having absorbing pads 4A, 4B to a loader body 3 travelled along a setting rail 2 so as to be freely elevated through an elevating guide 6, a motor 7 for rotation-driving a take-up roller 8 is arranged to a loader body 3. Further, two pieces of wound members 9, 9 of belt, etc., which are wound around the take-up roller 8 to elevate the elevating frame 5, are arranged. The elevating guide 6 is constituted with one pair of guide rods 14, 14 stood at both side parts of the elevating frame 5 and guide cylinders 15, 15 for guiding this rod. The two wound members 9, 9 are connected with each of both side parts of the lifting frame 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for a loader that travels along an erection rail to convey a plate material such as a sheet metal or other work to a processing machine.

[0002]

2. Description of the Related Art Conventionally, as a loader for adsorbing a stacked plate material with a suction pad and conveying it to a punch press or other plate material processing machines, a cylinder 42 is mounted on a traveling loader body 45 as shown in FIG. 6 (A). The center portion of the elevating frame 40 that stands upright and supports a plurality of suction pads 41 is attached to the cylinder 42.
There are things that can be raised and lowered with.

[0003]

However, in the structure in which the lifting frame 40 is lifted and lowered by the cylinder 42 as described above,
There are the following problems. Since the upper part of the cylinder 42 projects into the upper space of the device, the installation space for this device becomes large. It may be necessary to freely change the lifting stroke of the cylinder 42 according to the height of the uppermost surface of the stacking plate material. However, a cylinder that can perform such control is expensive, which increases the cost of the loader. When the plate material W is sucked only by the suction pads 41 at the biased positions as shown by the chain line in FIG. 6 (A), an unbalanced load acts on the elevating frame 40. The supporting configuration does not keep the loader horizontal. Further, under such an eccentric load, the cylinder 42
There is a possibility that the connecting portion A of the elevating rod 42a with the elevating frame 40 may be damaged.

As a measure for preventing the connection portion A from being damaged by the above-mentioned unbalanced load, as shown in FIG.
A play 44 is provided in the connecting member 43 that connects the lower end of the elevating frame 40 to the elevating frame 40, so that the elevating frame 40 can be finely moved laterally with respect to the elevating rod 42a.
In addition to the complicated connecting structure, the tilt of the elevating frame 40 due to an eccentric load is further increased.

The object of the present invention is to reduce the height of the device,
Further, it is an object of the present invention to provide an elevating device for a loader that can adjust the elevating position freely with a simple structure and reduce costs.
Another object of the present invention is to reduce the influence of an eccentric load even when gripping a work at an eccentric position, and enable stable conveyance.

[0006]

SUMMARY OF THE INVENTION A loader lifting device according to the present invention is a loader in which a lifting frame having a work gripping member is hanged up and down via a lifting guide on a loader main body running along an erection rail. A motor for rotating the winding roller is installed in the loader body, and a flexible winding member for winding the winding roller to raise and lower the elevating frame is provided.

The elevating guide is composed of a plurality of guide rods standing upright on both sides sandwiching the central portion of the elevating frame, and a guide tube provided on the loader body for guiding the guide rods up and down. Is also good. In this case, a plurality of winding members wound around the winding roller are respectively coupled to both side portions sandwiching the central portion of the elevating frame. The plurality of winding members may be wound by a winding roller driven by the same motor.

[0008]

According to the structure of the present invention, the winding roller is rotated by the motor installed in the loader main body to wind or rewind the winding member, so that the lifting frame moves up and down while being guided by the lifting guide. . Since the motor is driven up and down in this way, the up and down position of the lift frame can be adjusted by simple control. Further, since the motor is used as the lifting drive source, the height of the device does not increase.

When the elevating guide is composed of guide rods on both sides sandwiching the central portion of the elevating frame, and a plurality of winding members are connected to the both side portions, the elevating guide and the pulling force are applied to the center of the frame. Since the work is carried out on both sides of the lifting frame, even if the work is gripped at an eccentric position on the lifting frame, the influence of the eccentric load is small, and the work can be stably transported. In the case where one winding roller driven by the same motor is used to wind a plurality of winding members, the structure becomes simpler.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. FIG. 2 shows a plan view of the loader. Loader 1
Is provided with a lifting frame 5 extending in a direction orthogonal to the traveling direction and a fixed frame 25 extending in the traveling direction on a loader main body 3 traveling along the erection rail 2, and these frames 5, 25 serve as work gripping members. The suction pads 4A and 4B for transportation and the suction pad 4C for positioning are attached respectively. The loader body 3 is a traveling wheel 1
2 and a guide roller 13 are installed on the rail 2 so as to travel freely, and are driven to travel by a travel drive device 11 that rotationally drives a part of the travel rollers 12. The traveling drive device 11 comprises a motor mounted on the loader body 3, and the traveling roller 12 for driving is attached to the output shaft thereof. Guide roller 1
3 is provided with a guide 2a (FIG. 1) of the rail 2 which is vertically sandwiched and a rolling contact with both side surfaces of the rail 2 to stabilize traveling.

The elevating frame 5 has a pair of guide rods 14, 14 provided upright on both sides of the center thereof, and a guide tube 1 into which the guide rods 14, 14 are fitted so as to be vertically movable.
An elevating guide 6 composed of 5 and 15 guides the loader body 3 so that it can be moved up and down. The guide tubes 15 and 15 are erected downward at both widthwise ends of the loader body 3.

The lifting drive device 7 for the lifting frame 5 includes two flexible winding members 9, 9 and a guide roller 10,
10, a take-up roller 8, and a motor 7a for driving the take-up roller 8.
Composed of and. The motor 7 is installed on the loader body 3, and the take-up roller 8 is attached to its output shaft. The two winding members 9, 9 are made of belts, chains, ropes, or the like. One end of each of the winding members 9, 9 is coupled to the same winding roller 8, and the winding member 9 is wound around the winding roller 8 by the rotation thereof. The other end of each winding member 9, 9 is connected to the elevating frame 5 near the guide rods 14, 14 on both sides. Guide roller 1
Numerals 0 and 10 are for hanging and guiding the intermediate portions of the winding members 9 and 9, and in the vicinity of the guide rods 14 and 14,
It is rotatably installed on the upper surface of the loader body 3.

The suction pads 4A and 4B provided on the elevating frame 5 are biased downward by springs 16 respectively. Among them, the three suction pads 4A ₁ , 4A ₂ and 4A _{3 on the} left side in FIG. 1 can be selectively raised and retracted by the upward movement selecting device 17. The upward movement selecting device 17 includes a link mechanism 18 and a motor 19 that drives the link mechanism 18. The link mechanism 18 engages with a cam plate 20 provided on the elevating frame 5 so as to be laterally movable in the longitudinal direction thereof, and rotationally driven in forward and reverse directions by a motor 19 to engage with an engagement pin 21 of the cam plate 20. Swivel arm 2
2, and the cam plate 20 by the rotation of the rotation arm 22.
Of the suction pads 4A ₁ , 4A ₂ , 4A ₃
The cam follower 23 provided at the upper end of the is pushed up by the cam plate 20. That, along with the movement of the cam plate 20, in order of suction pads 4A _2, 4A ₃ from suction pads 4A _1, each suction pad 4A ₁ to 4A ₃ is lifted against the spring 16. As a result, the suction pads 4A ₁ , 4A ₂ , 4A are moved upward depending on the size of the plate material W to be conveyed.
₃ is selected. The remaining suction pad 4B is moved upward by the motor 24 and the link mechanism 24a.

The fixed frame 25 is fixedly installed below the loader body 3 via a support member 25a. The two suction pads 4C, 4C provided on the fixed frame 25 are for positioning the loading plate material W on the work table of the plate material processing machine, and each of which can be horizontally moved by the advancing / retreating cylinder 26 in an oblique direction with respect to the transport direction. is there. The vertical movement of the positioning suction pads 4C, 4C is caused by the fixed frame 2
5 is performed by the vertical movement device 27. The vertical movement device 27 includes a link mechanism 28 and the link mechanism 28.
The suction pad 4C on both sides is moved up and down integrally with the advancing / retreating cylinder 26 by driving the link mechanism 28.

The operation of the above configuration will be described. When adsorbing the plate material W loaded on a pallet or the like, the winding roller 8 is rotated in the rewinding direction by driving the motor 7 on the loader body 3, and the two winding members 9, 9 are rewound. As a result, the elevating frame 5 suspended from the wrapping members 9, 9 descends along the elevating guide 6. At this time, some of the suction pads 4A and 4B are raised and retracted in advance according to the size of the plate material W. Adsorption pads 4A, 4
When the elevating frame 5 is lowered until B reaches the highest height of the stacked plate material W, the plate material W is sucked by the suction pads 4A and 4B, and the winding roller 8 is rotated in the reverse direction. By this rotation, the two winding members 9 are wound around the winding roller 8, and the elevating frame 5 rises to the original height.

At this time, the suction pads 4A and 4B for transportation
Becomes almost the same level as the suction pad 4C for positioning.
In this state, the paddle-shaped roller table 30 (FIG. 3) enters below the plate material W whose one end is lifted by the suction pads 4A and 4B from the side of the elevating frame 5 as shown by the arrow, and the plate material W Is lifted on the table 30. The plate material W on the table 30 is sucked by the positioning suction pads 4C, and is sucked by the transfer suction pads 4A, 4B and the positioning suction pad 4C, and the loader body 3 is moved to carry the plate material W. .

According to the elevating device of the loader having this structure, since the elevating frame 5 to which the suction pads 4A and 4B are attached is moved up and down by the motor 7a as described above, the elevating drive system does not project higher from the loader main body 3, and the device The overall height can be kept low. In addition, the lifting frame 5 is driven by the motor 7a.
Therefore, it is possible to easily control the raising / lowering position of the raising / lowering frame 5 to an arbitrary height according to the loading height of the plate material W and the like. Further, since the motor 7a and the winding members 9 and 9 are used to move up and down, the structure is simple and the cost can be reduced.
Since the two winding members 9 and 9 are wound and driven by one motor 7a, the structure is further simplified.

The lifting frame 5 is guided by the two guide rods 14 and 14 located on both sides of the center of the lifting frame 5, and the two winding members 9 and 9 are similarly connected to both sides of the lifting frame 5. In order to apply the lifting force or the suspending force, even if the plate material W is attracted at a position deviated from the longitudinal direction of the elevating frame 5 as shown in FIG. 1, the influence of the eccentric load is exerted. The number of the plate materials W can be reduced and the plate material W can be stably transported.

In the above embodiment, the take-up roller 8
Although the case where two winding members 9 are wound while being overlapped is shown in FIG. 4, the winding roller 8 is configured by two rows of coaxial individual winding rollers 8a and 8b as shown in FIG. The hanging member 9 may be separately wound by the individual winding rollers 8a and 8b. In the case of such a configuration, since the respective winding members 9 can be wound by the same amount at the same timing, stable winding can be performed, and the lifting of the lifting frame 5 can be further stabilized.

Further, in each of the above embodiments, the elevating guide 6 of the elevating frame 5 is constituted by the guide rod 14, but it is also possible to elevate the elevating frame 32 by a pantograph type elevating guide 31 as shown in FIG. In this example,
A suction pad 4 for transportation and positioning is attached to the lifting frame 32, and is connected to the center of the lifting frame 32.
The book winding member 9 is wound by the winding roller 8 of the motor 7a on the loader body 3. Also in the case of this configuration, the height of the device can be reduced, and the ascending / descending position can be freely adjusted with a simple configuration, thus reducing the cost. Further, in each of the above-mentioned embodiments, the suction pad by negative pressure is used as the work holding member, but a magnet or a gripper type work holding member may be used. Further, the present invention can be applied not only to the plate loader but also to various work loaders.

[0021]

The loader lifting device according to the present invention is a flexible winding member that is wound by a winding roller in a loader in which a lifting frame having a work gripping member is installed in a loader body via a lifting guide. Since the lifting frame is configured to be lifted, the motor can be used as a lifting drive source, the height of the device can be reduced, and the lifting position can be freely adjusted with a simple structure, and the cost can be reduced.

According to the second aspect of the present invention, the elevating guide is composed of a plurality of guide rods standing upright on both sides of the center of the elevating frame and a guide tube for guiding the elevating frame. Since the wrapping member is also connected to both side portions sandwiching the central portion of the elevating frame, even if the work is gripped at an eccentric position of the elevating frame, the influence of the eccentric load is small and stable conveyance is possible. According to the third aspect of the invention, since the plurality of winding members are wound by one winding roller driven by the same motor, the structure is further simplified.

[Brief description of drawings]

FIG. 1 is a side view of a loader using an embodiment of a lifting device of the present invention.

FIG. 2 is a plan view of the same loader.

FIG. 3 is a front view of the loader.

FIG. 4 is a plan view showing a main part of another embodiment.

FIG. 5 is a side view of a loader equipped with a lifting device according to still another embodiment.

FIG. 6A is a side view of a conventional example, and FIG. 6B is a vertical cross-sectional view showing a modified example of the main part thereof.

[Explanation of symbols]

1 ... loader, 2 ... installation rail, 3 ... loader body, 4A,
4B ... Suction pad (work holding member), 5 ... Lifting frame, 6 ... Lifting guide, 7 ... Motor, 8 ... Winding roller, 9 ... Winding member, 14 ... Guide rod, 15 ... Guide tube

Claims (3)

[Claims] 1. In a loader main body running along an erection rail, an elevating frame having a work holding member is hung up and down via an elevating guide, and in the loader main body, a motor for rotationally driving a winding roller is provided. And an elevating device for a loader provided with a flexible winding member that is wound up by the winding roller to elevate the elevating frame. 2. An elevating guide includes a plurality of guide rods, which are respectively provided upright on both sides of the elevating frame with a central portion interposed therebetween, and a guide tube which is provided in the loader body and guides the guide rods so that the elevating guide is movable. 2. The elevating device for a loader according to claim 1, wherein a plurality of wrapping members, each of which is composed of ??? and ???, which are wound around the winding roller, are respectively coupled to both side portions sandwiching the central portion of the elevating frame. 3. The lifting device for a loader according to claim 2, wherein the plurality of winding members are wound by a winding member driven by the same motor.