JPS6351911B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a conveyance device for conveying a conveyed object between assembly processes, etc.

[Prior Art] As conventional devices of this type, two different types of conveying devices are known, for example, as shown in FIG. 1 and FIG. 2.

First, in the conveying device shown in FIG. 1, a lifter 3 disposed above a rectangular base 1 is set to be movable up and down by a lift cylinder 2, and a large number of rubber rollers 4 are mounted in two rows parallel to each other on this lifter 3. It is set in. During the work in this process, the lifter 3 is lowered from the state where the conveyed object (for example, the car body panel 5) is placed on the rubber roller 4 as shown in the figure, and the car body panel 5 is lifted off the lifter 3 by the plurality of support posts 6. Let me receive it. In this state, work such as spot welding is performed on the vehicle body panels 5 and the like. Thereafter, the lifter 3 is raised, and during the lift, the car body panel 5 is separated from the support post 6, placed on the rubber roller 4, and lifted to the highest position.Then, the car body panel 5 is moved on the rubber roller 4 by human power. It was being transported to the next process.

On the other hand, in a different conveying device shown in FIG. It is placed on the roller 13 of the conveyance hydraulic motor 12. The vehicle body panel 5 is placed on this rail 9, and the transportation hydraulic motor 12 is driven to rotate the roller 13 to move the rail 9.
was transported to the next process. Incidentally, work such as spot welding is performed by setting the vehicle body panel 5 on a support post (not shown) in the same manner as in the above-mentioned conveyance device.

[Problems to be Solved by the Invention] However, in the conveyance device shown in FIG. 1, since the vehicle body panel 5 moves on the rubber rollers 4 during conveyance, the body panel 5
There is a risk of damage to the body panel 5, and since there is nothing to guide it when moving the body panel 5, the posture of the body panel 5 is unstable, and the body panel 5 may shift outward and cause damage to other objects. There is a risk of interference with other objects.

In addition, in the case of the conveyance device shown in Fig. 2, since the rail 9 is continuous between multiple work processes, it is not possible for people to pass between the work processes, and when going to the opposite side of the conveyance device. It was very inconvenient. Moreover,
The pitch between each work process (the distance between each work process) had to be the same, and the installation position of each work process was regulated, which caused problems such as setting the installation position was troublesome. .

SUMMARY OF THE INVENTION Therefore, the purpose of this invention is to prevent the occurrence of scratches during the transportation of conveyed objects, to convey the conveyed objects in a stable posture, and to enable passage between each work process, as well as to prevent pitches between each work process. The aim is to provide a transport device that can be changed.

[Means for Solving the Problems] The present invention has been made by focusing on the above-mentioned conventional problems, and includes a base, and a base, which is arranged above the base and extends along the conveyance direction of the conveyed object. , a lifter that is movable up and down by a drive device, a guide disposed on the lifter in the conveyance direction, and guided so as to be freely movable along the conveyance direction by the guide,
a ski formed so that the overall length is approximately equal to the lifter and provided with a receiving piece for positioning and holding the conveyed object in a predetermined position; and a ski that is attached to the base and placed on the ski. A conveying unit is constituted by a support post that receives the conveyed object from the ski during the descent of the lifter, and two or more sets of the conveying units are arranged in tandem along the conveying direction, and there is a gap between each adjacent conveying unit. The highest and lowest positions of the lifters are made equal so that the skis can be transferred at the same time, and the intervals between the ends of the lifters of the adjacent transport units are set to within half the length of the skis. , at the lifter's highest position, the conveyed object placed on the ski of the upstream conveying unit is conveyed to the lifter of the downstream conveying unit by sliding the ski, and the conveyed object is lowered by lowering the lifter. While receiving skis from the skis to the support post, at the lowest position of the lifter, only the empty skis are slid back to the lifter of the upstream transport unit;
The conveying device is characterized in that by raising the lifter, the ski is configured to receive the conveyed object placed on the support post of the upstream conveying unit.

[Example] The present invention will be described below based on each example.

3 to 5 are diagrams showing a first embodiment of the present invention.

First, the structure will be described. As shown in FIG. 3, the conveyance apparatus of the present invention is constructed by two or more sets of conveyance units X and Y arranged in tandem along the conveyance direction.

Roughly speaking, these transport units X and Y are provided with a lifter 21 disposed above a base 22 so as to be movable up and down, and a ski 20 that transports a vehicle body panel 5 as a transport object on this lifter 21, which can be freely runnable. It is arranged and roughly structured. In addition, in FIG. 3, the skis 20 and the vehicle body panel 5 are not shown on the left side (downstream side) of the conveyance unit Y in order to clearly show the structure of the guide 26, etc., which will be described later.
Of course, skis 20 are provided to support the vehicle body panel 5, similar to the right (upstream side) transport unit X.

In the ski 20, the ski main body 20a has a rectangular prism shape with a predetermined length, and two receiving pieces 23 are provided at predetermined positions of the ski main body 20a for positioning and supporting the vehicle body panel 5, which is an object to be transported. .
This receiving piece 23 is provided with an elastic rubber plate 24 at a stepped portion on which the vehicle body panel 5 is placed.
Two skis 20 are provided in pairs, and a total of four receiving pieces 23 hold the vehicle body panel 5 in a predetermined position.

Further, the lifter 21 has a rectangular frame-shaped support 25 extending in the conveyance direction, and is vertically movable by a lifter cylinder 27 that is a driving device. The lifter 21 and the ski 20 are set to have substantially equal overall lengths. On both sides of the lifter 21, four guides 26 are disposed on each side, for a total of eight guides 26, which allow the skis 20 to move freely in the transport direction. This guide 26 includes a horizontal plate 26a that projects horizontally from the support 25, and two shafts 26 that project upward from the horizontal plate 26a.
b are provided at predetermined intervals, and rollers 26c that come into contact with both sides of the ski 20 to regulate the position are rotatably mounted on the shaft 26b. Further, two parallel plates 26d extending in the vertical direction are fixed to this horizontal plate 26a, and a horizontal shaft 26e is constructed between these two plates 26d.
A roller 26f that contacts the bottom surface of the ski 20 and supports the ski 20 in a slidable manner is rotatably provided on the roller 6e.

On the other hand, the base 22 has a rectangular shape of a predetermined size, and is provided with a total of four support posts 28, two ski feeding devices 29, and four ski positioning devices 30. There is.

This support post 28 is used to transfer the vehicle body panel 5 to and from the ski 20 when the lifter 21 moves up and down, and is positioned at a predetermined position on the periphery of the base 22 so as not to interfere with the lifter 21 when the lifter 21 is lowered. It is provided. This support post 28 has a receiving surface 28 for receiving the vehicle body panel 5.
a is provided, and this receiving surface 28a holds the vehicle body panel 5 on the lifter 2 when the lifter 21 is lowered to its lowest position.
It is set at a height that supports it in a raised state from 1.

On the other hand, as explained in FIG. 3, the ski rotation device 29 converts the skis 20 sent from the conveyance unit X on the right side (upstream side) to the conveyance unit Y on the left side (downstream side) in the figure to the original state. These are devices for sending back to the transport unit X on the upstream side, and are arranged in pairs on the base 22 along the transport direction, and have the following configuration. That is, in this ski feeding device 29, a motor 29b is fixed to a mounting plate 29a, and this motor 29b is connected to a rotating shaft 29d rotatably supported by a pair of bearings 29c via pulleys 29e, 29f and a belt 29g. are connected. Rubber rollers 29h are provided at both ends of the rotating shaft 29d, which come into contact with the bottom surface of the ski 20 held by the lifter 21 when the lifter 21 is in its lowest position.

The ski positioning device 30 also includes a base 22
Two pairs of skis 20 are provided at predetermined positions on both longitudinal ends of the ski 20 to position the ski 20 at a predetermined position. Specifically, this ski positioning device 30
As mainly shown in FIGS. 3 and 5, a support member 30e is provided protruding from the end surface of the base 22, and a rotary arm 30b is rotatably attached to this support member 30e. The rotating arm 30b is set to stop at a predetermined position by a pair of springs 30c and 30d, and is urged to return to that position no matter which direction the rotating arm 30b is rotated. . A positioning shaft 30a is provided at the tip of the rotating arm 30b to protrude upward. Now, when the ski 21 is moved by a small external force when the lifter 22 is in its lowest position, the longitudinal end surface of the ski 21 will come into contact with the positioning shaft 30a and be positioned at a predetermined position. ing.

Note that the reference numeral 31 in the figure is a lifter guide extending downward from the lifter 21, and the lifter guide 31 is inserted into a guide member 31a fixed to the side of the base 22 so as to be slidable in the vertical direction.
The lifter guide 31 allows the lifter 21 to be moved up and down in a constant posture.

Each of the transport units X and Y configured as above is
The highest and lowest positions of each lifter 21 are set equally so that the skis 20 can be transferred between adjacent transport units X and Y. In addition, both lifters 2 of adjacent transport units X and Y
The distance between the first ends is set to within half the length of the skis 21 so that the skis 21 can be transported.

Next, the operation of the conveying device having such a configuration will be explained.

Each of the transport units X and Y of this transport device sequentially transports the vehicle body panels 5 by performing similar operations, but in the following explanation, for convenience,
The case where the vehicle body panel 5 is transported from the upstream transport unit X to the downstream transport unit Y in FIG. 3 will be described.

First, from the state shown in FIG. 3, the pair of skis 20 on which the vehicle body panel 5 is mounted are manually operated to travel downstream. In this case, the ski 20 has two rollers 26c in contact with the sides.
With the position regulated by , the roller 26f slides in the downstream direction due to the rolling motion of the roller 26f. In this case, the pair of skis 20 are separated from each other, but since the vehicle body panel 5 is positioned and supported by the receiving piece 23 on both skis 20, both skis are 20 will be indirectly connected. So, one ski 2
By applying an external force to the ski 0 and causing it to slide, the other ski 20 also slides together. The ski 20 on which the vehicle body panel 5 is placed is guided by the guide 26 of the transport unit Y on the downstream side in the figure. During this transportation, the vehicle body panel 5 is positioned and held by the receiving piece 23 and does not move relative to the skis 20, so that the vehicle body panel 5 is not damaged and can be carried out in the next process. It is transported to the downstream transport unit Y side. Furthermore, since the vehicle body panel 5 can also be transported in a constant posture, there is no risk of it shifting outward and interfering with other objects, unlike in the conventional case.

Thereafter, in the transport unit Y on the intermediate and downstream side in FIG.
2 is lowered by the lifter cylinder 27. When the vehicle body panel 5 reaches a predetermined position on the way down, it comes into contact with and is supported by the receiving surfaces 28a of the plurality of support posts 28, and when the lifter 22 is further lowered, the vehicle body panel 5 is supported by the support posts 28. , it is detached from the ski 20 and becomes floating. Work such as spot welding will be performed on the vehicle body panel 5 supported by the support post 28.

Then, move the lifter 22 to the lowest position,
When lowered, the bottom surface of the empty ski 20 comes into contact with the two rubber rollers 29h of the ski transport device 29.

In this lowest position, even if a slight external force acts on the ski 20 and the ski 20 tries to move, the end surface of the ski 20 will come into contact with the positioning shaft 30a, so the ski 20 will be positioned at a predetermined position. It will be done. Then,
During spot welding work, the ski 20 does not accidentally jump out from the conveyance unit Y and does not interfere with the work.

From this state, when the motor 29b is driven and the rubber roller 29h is rotated clockwise,
The skis 20 are sent to the original transport unit X on the upstream side in FIG. In this case, the ski 20 has
Since an external force of a predetermined magnitude is applied, the end surface of the ski 20 first comes into contact with the positioning shaft 30a on the left side in FIG.
This ski 20 is moved to the upstream conveyance unit Y by rotating the ski 20 in the direction shown in FIG.
The guide 26 of the lifter 21 is at its lowest position.

In this forwarding completion state, since the drive of the ski forwarding device 29 is stopped, no large external force acts on the ski 20, and as a result, both end surfaces of the ski 20 are moved by the pair of positioning shafts 30a.
It will be positioned at a predetermined position.

In this state, although not shown, the support post 28 of the transport unit X on the upstream side in FIG. 3 supports the vehicle body panel 5 that has been transported from further upstream. From this state, lifter 2
1, the vehicle body panel 5 is positioned and supported by the receiving pieces 23 of the pair of skis 20 during the ascent, and the vehicle body panel 5 is received from the support post 28, as shown in FIG. Then, it will be raised to the highest position.

In this way, one cycle ends.

In such a conveying device, skis 20 are not present between adjacent conveying units X and Y, except when skis 20 are sent to adjacent conveying units X and Y. This will make it possible to pass between the two, improving work efficiency.

Further, FIGS. 6 and 7 show a second embodiment of the present invention.

The transport unit X of this embodiment differs from the first embodiment in that it includes only one ski 40. This ski 40 is supported by a lifter 41 so as to be freely movable. This ski 40 has a ski main body 40a.
is in the shape of a square prism, and a T-shaped member 43a is erected at both ends, and L-shaped receiving pieces 43b are disposed at both ends of the T-shaped member 43a.

On the other hand, as shown in FIG. 7, the lifter 41 that slidably supports the ski 40 is composed of two U-shaped members 45a each having a U-shaped vertical cross section and facing each other at a constant interval. A support 45 is provided, and a guide 46 is provided on the support 45 to guide the ski 40 in a freely traveling manner. This guide 46 includes a U-shaped member 45 as shown in FIG.
Two rollers 46b are attached to a shaft 46a disposed vertically inside a.
b and rolls against both sides of the ski body 40a to prevent the ski body 40a from falling. Further, support panels 46 each having an L-shaped cross section are provided at several locations on the lower surface of both U-shaped members 45a.
c is fixed, a shaft 46d is provided along the horizontal direction on both support panels 46c, and a roller 46e for supporting the ski 40 is rotatably provided on this shaft 46d.

On the other hand, the base 42 has, as shown in FIG.
A ski feeding device 4 consisting of a motor 49b, a rubber roller 49h connected to the motor 49b, etc.
9. A ski positioning device 50 having a positioning shaft 50a and a support post 28 for supporting the vehicle body panel 5 are provided. These are set to exhibit the same functions as those of the first embodiment.

In addition, the reference numeral 52 in the figure is a lifter guide that keeps the posture of the lifter 41 constant when the lifter 41 moves up and down.

Although such conveyance units X are not shown, a plurality of such conveyance units X are arranged along the conveyance direction to constitute a conveyance apparatus, as in the first embodiment. The interval between adjacent conveyance units X is set to be shorter than half the overall length of the skis 40.

The operation of such a transport device is based on the transport unit
The vehicle body panel 5 is supported on a total of four receiving pieces 43 of the skis 40, and the vehicle body panel 5 is conveyed by sliding the skis 40 on a guide 46. At this time, the ski 40 is moved between two upper and lower rollers 46b.
Since the position is regulated by , it is transported without tilting.

If the number of skis 40 is one as in this embodiment, the mechanisms of the ski forwarding device 49 and the ski positioning device 50 are not required for two skis, unlike the first embodiment. The configuration can be simplified.

Note that the operations of the ski forwarding device 49 and the ski positioning device 50 are similar to those of the first embodiment, so a description thereof will be omitted.

In the first and second embodiments as described above,
As shown in FIG. 2 of the conventional system, the rail 9 does not straddle multiple work processes, and each transport unit X,
Since these transport units are separated into Y, when multiple transport units This increases the degree of freedom when setting the installation location.

Further, in the first and second embodiments, the vehicle body panel 5 was conveyed manually, but automation can be achieved as shown in FIGS. 8 to 10.

That is, in the case of two skis 20 as in the first embodiment, as shown in FIG. It is attached to the lower surface of the body 25.

Specifically, in this ski transport/transfer device 60, a mounting plate 60a is fixed to the lower surface side of the lifter support 25, a motor 60b is fixed to the mounting plate 60a, and the motor 60b is connected to a pulley 60c,
60e is connected to a rotating shaft 60f via a belt 60d, and rubber rollers 60g are disposed at both ends of the rotating shaft 60f. This rubber roller 60g is attached to the guide 26 of the lifter 21.
The ski 20 is configured to abut against the bottom surface of the ski 20 which is slidably supported by the ski 20. With this ski transporting device 60, at the highest position of the lifter 21, the skis 20 can be transported downstream, and
At the lowest position of the lifter 21, the ski 20 can be sent upstream.

Therefore, by using the ski transporting device 60, it is possible to automatically transport and transport the skis 20 with one device without using the ski transporting device 29 as in the first embodiment.

Further, in the case of one ski 40 as in the second embodiment, a ski transportation device 65 as shown in FIG. 9, for example, can also be used. That is, in this ski transportation device 65, an air motor 65a is fixed to the base 42, a mounting plate 65b is fixed to the lifter 41, and a rubber roller 65c is rotatably disposed on the mounting plate 65b. . A pulley 65h is disposed on the rotation shaft of the rubber roller 65c, and a pulley 65f is disposed on the drive shaft of the air motor 65a. These pulleys 65f, 65h have a pair of support shafts 65d,
65e is rotatably connected, and both support shafts 65d, 65e are rotatably connected to each other via a pulley 65g. Two belts 65 are attached to these pulleys 65f, 65g, and 65h.
i, 65j is multiplied.

In this way, when the lifter 41 moves up and down, the two support shafts 65d and 65e bend and extend.
Even when the lifter 41 is in the highest position or the lowest position, the driving force from the air motor 65a is applied to the pulleys 65f, 65g, 65h and the belt 65i.
It will be transmitted to the rubber roller 65c via 65j. By rotating this rubber roller 56c forward and backward, the ski 40 is moved to the lifter 4.
It is conveyed at the highest position of No. 1, and is transported at the lowest position.

Therefore, in this case as well, this ski transportation device 6
5, the skis 40 can be automatically transported and forwarded.

Furthermore, FIG. 10 shows a ski transport device 65 in the case of one ski 40. This ski feeding device 65 has a locked member 70a on the upper surface of the ski 40.
is fixed in a direction perpendicular to the ski 40, while
A locking member 70c having a convex portion 70b that engages with the locked member 70a is provided. This locking member 70c is set to be movable along the lifter 41 by a pair of rollers 70f on a rail 70e whose tip portion 70d is curved downward, and is movable along the lifter 41 by an air cylinder 70g. It is becoming driven.

The transport unit X provided with this ski transport device 65 is provided with a ski transport device 49 as shown in FIG.

This ski conveyance device 65 operates the air cylinder 70g from the state shown in the figure, and operates the locking member 70c.
When the rail 70e is moved in the direction of arrow B in the figure, the rail 70e
When the locking member 70c moves the tip 70d of the protrusion 70b, the position of the protrusion 70b rises.
b and the locked member 70a of the ski 40 come into contact with each other, so that the ski 40 is slid and sent to the conveying unit Y on the downstream side.

[Effect of the invention] As explained above, according to this invention,
Skis are transferred between multiple adjacent transport units, and the transported object is positioned and held on the ski by a receiving piece and transported to the next process, so the transported object is transported together with the ski. Therefore, it is possible to prevent damage to the transported object during transportation, and also to transport the transported object in a stable posture. In addition, a certain distance is provided between adjacent transport units, and it is possible to pass through them except when transporting skis, which improves work efficiency and makes it possible to change the distance between adjacent transport units. This has the practical advantage of being easy to install and install.

[Brief explanation of the drawing]

FIGS. 1 and 2 are perspective views showing different conventional conveying devices, and FIGS. 3 to 5 are views showing a first embodiment of the conveying device of the present invention.
The figure is a perspective view showing the state in which two conveyance units of this conveyance device are installed, FIG. 4 is a perspective view showing skis and guides of the same conveyance unit, FIG. 7 and 7 are diagrams showing a second embodiment of the present invention, FIG. 6 is a perspective view showing the conveyance unit, and FIG. 7 is a -
The enlarged cross-sectional views taken along the line and FIGS. 8 to 10 are perspective views showing different ski transport and forwarding devices, respectively. 5...Vehicle body panel (carried object), 20, 40...
Ski, 21,41...Lifter, 22,42...
...Base, 23,43...Receive piece, 26,46...
...Guide, 28...Support post, X, Y...Transportation unit.

Claims (1)

[Scope of Claims] 1: a base; a lifter disposed above the base so as to extend along the conveying direction of the conveyed object; and a lifter that is movable up and down by a drive device; a guide disposed on the lifter; and a receiver configured to be movably guided along the conveyance direction by the guide, whose overall length is approximately equal to that of the lifter, and to position and hold the conveyed object at a predetermined position. A conveying unit is constituted by a ski provided with a bridge, and a support post mounted on the base and receiving a conveyed object placed on the ski from the ski during the descent of the lifter, and the conveying unit is Two or more sets are arranged in tandem along the conveying direction, and the highest and lowest positions of the lifters are made equal so that the skis can be delivered between each adjacent conveying unit, and each of the adjacent conveying units The distance between each lifter end of the conveyance unit is set to within half the length of the ski, and at the highest position of the lifter, the ski is slid to remove the conveyed object placed on the ski of the upstream conveyance unit. The skis are then transported to the lifter of the downstream transport unit, and when the lifter is lowered, the skis are received from the skis to the support post, while at the lowest position of the lifter, only the empty skis are slid and The ski is set to receive the conveyed object placed on the support post of the upstream conveying unit by returning the ski to the lifter of the upstream conveying unit and further raising the lifter. Conveyance device for