JP5151663B2 - Carriage conveyor with lifting function - Google Patents

Description

  The present invention relates to a cart conveyor equipped with an elevating function, which can make the height of an object to be conveyed suitable for work.

For example, in a car assembly line at a garment factory, a cart conveyor equipped with a lifting function that can raise and lower the vehicle body to a height suitable for component assembly work in a trim process for assembling interior parts, etc., or a final process for assembling exterior parts, etc. Is used to raise and lower a transport base on which a transported object is placed by mounting a lift drive motor on the base of the carriage, to lift and lower the transport base by a lift drive device installed in the transport path, There is one that drives a transport table lifting / lowering support means that supports a transport table so that it can be moved up and down in a vertical direction by a guide rail installed on the transport rail.
Here, the structure in which the conveying platform lifting / lowering support means is driven by the guide rail installed on the ground has the feature that the lifting / lowering driving device such as a geared motor is not required and the control device is not required.

  As a cart conveyor equipped with a lifting / lowering function configured to drive the transporting platform lifting / lowering support means by such guide rails installed on the ground, the transporting base (conveyed object support base) is based on a cross link as a transporting platform lifting / lowering supporting means. A first operated part of a projecting link that is supported by a table (transportation traveling body) so as to be movable up and down, and is provided alongside the cross link and projects below the base, and fixing of the cross link and base A second operated portion is provided at or near the intermediate bending fulcrum of the toggle link interposed between the positions, and the toggle link is located at both ends on the upper side with respect to the intermediate bending fulcrum when the carriage is at the lower limit. When the fulcrum is folded to one of the front and rear sides in the running direction, and when the carriage rises to an intermediate height, the upper end fulcrum is divided into the front and rear sides of the running direction. And the second operated part in the expanded state is positioned below the first operated part at this time, and acts on the first operated part to convey the carriage Has a first cam rail that raises the carriage to the intermediate height, and a second cam rail that acts on the second operated portion and raises the transport platform from the intermediate height to the highest height (Patent Document 1). reference.).

Japanese Patent Laying-Open No. 2006-62805 (FIGS. 1-4)

According to the cart conveyor provided with the lifting / lowering function of Patent Document 1, the first operated part is operated by the first cam rail to change from the lower limit height to the intermediate height, and the second operated part is operated by the second cam rail. With the two-stage configuration from the height to the uppermost height, the elevation stroke can be made relatively large while maintaining the height of the lower space of the base to a low floor structure.
However, even in such a configuration, there is a restriction on the link configuration of the protruding link attached to the cross link and the toggle link interposed between the cross link link and the fixed position on the base side. It is difficult to further increase the lifting stroke while maintaining the structure.

  Therefore, in view of the above-described situation, the present invention intends to provide a cart conveyor having a lifting function capable of easily ensuring a large lifting stroke while maintaining a low floor structure.

  In order to solve the above problems, the cart conveyor having the lifting function according to the present invention is a transport in which an object to be transported is placed on the base of the cart traveling on a track laid along the transport path. A carriage conveyor provided with a carriage raising / lowering support means for supporting a table so that it can be moved up and down in a vertical direction, and having a raising / lowering function capable of changing the height of the carrier from a low position to a high position. , A rotating body supported rotatably around a rotation axis in the left-right direction, a plurality of cam rollers attached to the rotating body with a phase shifted in the circumferential direction and spaced apart in the left-right direction, and the conveyance table raised and lowered A plurality of cam levers spaced apart in the left-right direction are driven so that the plurality of cam rollers are respectively driven so that the rotating body rotates forward or backward in response to traveling of the carriage at a predetermined location on the conveyance path. And a pulley fixed to the rotating body concentrically with the rotating shaft of the rotating body, and a flexible elongate member having one end fixed to the pulley and wound. Alternatively, the transport table lifting / lowering support means is driven to move the transport table up and down by winding or unwinding the flexible long member by reverse rotation.

  According to the cart conveyor equipped with the lifting function according to the present invention, the transport platform on which the object to be transported is placed in the vertical direction with respect to the base of the cart traveling on the track laid along the transport path. A carriage conveyor provided with a carriage raising / lowering support means for supporting a linearly movable raising / lowering and having a raising / lowering function capable of changing the height of the carriage from a low position to a high position, and rotating in the left-right direction by the base A rotating body supported rotatably around an axis, a plurality of cam rollers attached to the rotating body with a phase shifted in the circumferential direction and spaced apart in the left-right direction, and a predetermined portion of a conveying path for moving the conveying table up and down A plurality of cam rails spaced apart in the left-right direction, each driven by the plurality of cam rollers so that the rotating body rotates forward or backward in response to travel of the carriage, and the rotation A pulley fixed to the rotating body concentrically with the rotating shaft, and a flexible long member having one end fixed to and wound around the pulley, and the movable body is configured to rotate the forward or backward rotation of the rotating body. Since the conveying table raising / lowering support means is driven by winding or feeding the flexible long member to raise and lower the conveying table, the phase of the rotating body supported by the base is shifted in the circumferential direction and separated in the left-right direction. A plurality of cam rollers are attached, the cam roller is driven on a cam rail installed on the ground, the rotating body is rotated, and a flexible long member wound around a pulley concentric with the rotating body is wound or fed out. In order to drive the transport table raising / lowering support means, the raising / lowering driving device and its control device are not required.

Further, by operating a to-be-operated portion (cam driven roller) of a link such as a projecting link and a toggle link provided on a cross link which is a transport table lifting support means as in Patent Document 1, the transport table lifting support means is operated by a cam rail. Compared to the configuration to drive, because it is a configuration to drive the transport table lifting and lowering support means by winding or feeding the flexible long member wound around the pulley concentric with the rotating body supported by the base, There is no need to provide a link for operation on the transport table lifting support means.
Therefore, since there is no restriction on the link configuration, it is possible to easily ensure a large lifting stroke while maintaining a low floor structure.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste. In addition, in this specification, the conveyance direction (refer arrow A in a figure) side of the trolley | bogie 1 is made into the front, the left and right shall be referred to as the front, and the figure seen from the right shall be a front view.
Further, the carriage 1 is driven by a travel drive device such as a friction roller drive device, a power chain drive device or a self-propelled drive device (not shown) and is transported along a transport path. Since this is a general configuration, a detailed description thereof will be omitted below.

1 to 3 are schematic views showing a configuration of a carriage conveyor having a lifting function according to an embodiment of the present invention, and FIG. 1 is a longitudinal section showing a case where the height of the carriage 3 is a high position H. FIG. 2 is a plan view, and FIG. 3 is a longitudinal front view showing a case where the height of the transport table 3 is at a low position L. FIG.
4 is a perspective view showing an example of the rotating body 5 and the cam rollers 11,... And the cam rails CR1,... FIG. 5 shows a case where the rotating body 5 is rotated backward to feed the flexible long member 7 out of the pulley 6. FIG. 6 is an enlarged front view of the main part showing an example, and FIG. 6 is an enlarged front view of the main part showing an example in the case where the flexible member 7 is wound around the pulley 6 by rotating the rotating body 5 forward. 6 shows a state in which the rotating body 5 sequentially moves in the transport direction A together with the carriage 1 from the state (a) on the upstream side to the state (d) on the downstream side.

  As shown in FIG. 1 to FIG. 3, the cart conveyor provided with the lifting function according to the embodiment of the present invention is a front / rear / left / right roll on the left and right traveling rails R, R laid along the transport path. The base 2 of the carriage 1 to which the horizontal guide rollers 9,... Rolling along the left and right side surfaces of the traveling wheels 8,. A transport table lifting / lowering support means 4 is provided to support the transport table 3 on which the object to be transported is placed so that the transport table 3 can move up and down in the vertical direction. The position is variable up to the high position H (see FIG. 1).

  The phase is shifted in the circumferential direction between the rotating body 5 and the rotating body 5 that are positioned, for example, on the front side of the transport table lifting support means 4 and are supported by the base 2 so as to be rotatable around the rotation axis C in the left-right direction. , And a plurality of cam rollers 11, 12,... That are mounted apart from each other in the left-right direction, and the rotating body 5 rotates forward or backward in accordance with the traveling of the carriage 1 at a predetermined position on the conveying path for raising and lowering the conveying table 3. The plurality of cam rollers 11, 12,... Are respectively driven in such a manner that the cam rails CR 1, CR 2,. Pulleys 6 and 6 fixed on both sides, and belts 7 and 7 which are flexible long members having one end fixed and wound around the pulleys 6 and 6 are provided.

Next, the structural example of the conveyance stand raising / lowering support means 4 is demonstrated.
The links 21 and 22 constituting the X-shaped symmetric links (cross links) 10 and 10 located on the left and right of the carriage 3 have the same length, and the upper end of the link 22 can be rotated around the left and right axis 22A. The lower end of the link 21 directly below the left and right axis 22A is connected to the base 2 so as to be rotatable about the left and right axis 21B.
Further, the upper end portion of the link 21 is connected to the transport table 3 so as to be rotatable around the left-right axis 21A, and the left-right axis 21A is supported to be slidable in the front-rear direction. The lower end is connected to the base 3 so as to be rotatable about the left-right axis 22B, and the left-right axis 22B is supported to be slidable in the front-rear direction.

Furthermore, since the midpoints between the upper and lower support shafts 21A, 21B and 22A, 22B of the links 21 and 22 are connected by the support shaft 20, the links 21 and 22 can be rotated around the support shaft 20 relatively. The X-shaped symmetric link 10 is configured.
The X-shaped symmetrical link 10 expands and contracts vertically when the distance between the upper end portions (left and right direction shafts 21A and 22A) or the distance between the lower end portions (left and right direction shafts 22B and 21B) is changed. It moves up and down linearly with respect to the table 2.
In addition, the conveyance stand raising / lowering support means 4 is not limited to the X-shaped symmetric links 10, 10, and a combination of a plurality of X-shaped symmetric links 10 can be used, and a plurality of parallel link mechanisms can be used. A combined configuration or the like may be used.

Pulleys 27, 27 are attached to the left and right sides of the support shaft 25 located on the rear side of the intersection of the left and right X-shaped symmetrical links 10, 10, and concentrically attached to the outer sides of the pulleys 27, 27 in the left-right direction. The rollers 23 contact the upper rear surface 21C of the link 21 and the lower rear surface 22D of the link 22.
In addition, pulleys 28 and 28 are attached to the left and right sides of the support shaft 26 located on the front side of the intersection of the left and right X-shaped symmetrical links 10 and 10, and concentrically attached to the left and right outer sides of the pulleys 28 and 28. The rollers 24 contact the upper front surface 22C of the link 22 and the lower front surface 21D of the link 21.
The belts 7 and 7 wound around the pulleys 6 and 6 on both the left and right sides of the rotating body 5 are the pulleys 27 and 27 on the rear side of the intersecting portion of the X-shaped symmetrical links 10 and 10 and the pulley 28 on the front side of the intersecting portion. , 28, and then hooked on a bracket 29A attached to the support shaft 25 by a hooking member 29B.

Next, a configuration example of the rotating body 5 and the plurality of cam rollers 11, 12,.
As shown in FIGS. 1 to 4, the rotating body 5 supported by the base 2 so as to be rotatable around the rotation axis C shifts the phase at a 45 ° pitch in the circumferential direction around the rotation axis C and is separated in the left-right direction. .., 18 are rotatably mounted around the support shafts 11A, 12A,..., 18A, respectively, and these cam rollers 11, 12,. , CR8 is driven by the cam rails CR1, CR2,.

Next, a configuration example in which work is performed while the height of the transfer table 3 is maintained will be described.
As shown in FIGS. 1 and 2, the rotating body 5 rotates in a state where the carriage 1 is traveling while the cam roller 11 rolls on the height holding cam rail CRH having a horizontal upper surface and extending in the front-rear direction. Therefore, the height (high position H) of the transport table 3 is maintained, and in this state, it is possible to perform a part assembling work or the like on the object to be transported on the transport table 3.
It should be noted that one of the cam rollers 11, 12,..., 18 is rolled on the height holding cam rail CRH, so that the height of the carriage 3 is held at an arbitrary height between the high position H and the low position L. can do.

Next, with reference to FIG. 1, FIG. 2, and FIG. 5, the operation of lowering the transport table 3 at the high position H will be described.
Lowering cam rails CR 1, CR 2,... Having lower front inclined surfaces are installed at locations where the conveying table 3 is lowered. As the carriage 1 travels, cam rollers 11, along the front lower inclined surface of the cam rails. When the rollers 12,... Roll, the rotating body 5 rotates backward (see arrow B in FIG. 5).
For example, when the rotating body 5 moves forward together with the carriage 1 from the state of FIG. 5A to the states of FIG. 5B and FIG. 5C, the cam roller 11 rolls along the front downward inclined surface of the cam rail CR1. Thus, the rotating body 5 rotates backward by the cam roller 11 driven by the cam rail CR1 (see arrow B in FIG. 5).

Then, as shown in FIG. 5 (d), the cam roller 12 rolls along the front downward inclined surface of the cam rail CR2 before the cam roller 11 leaves the front downward inclined surface of the cam rail CR1, and the cam roller is driven by the cam rail CR2. 12, the rotating body 5 rotates backward (see arrow B in FIG. 5D).
Similarly, the rotating body 5 rotates backward while being successively taken over by the cam roller 13 driven by the cam roller CR3, the cam roller 14 driven by the cam roller CR4, and so on.

  Therefore, the belts 7 and 7 are fed (see arrow D in FIG. 5), and the rollers 23,... While moving against the X-shaped symmetrical link 10 while abutting 22D, the rollers 24,... Are symmetrical with the X-shape while abutting against the upper front surface 22C of the link 22 and the lower front surface 21D of the link 21. Since the object to be transferred and the transfer table 3 move downward relative to the link 10 (see arrow DN in FIG. 1), the low position L shown in FIG.

Next, with reference to FIGS. 3, 4, and 6, an operation for raising the transport table 3 at the low position L will be described.
Ascending cam rails CR1, CR2,... Having a front rising inclined surface are installed at locations where the conveying table 3 is raised, and as the carriage 1 travels, cam rollers 11, 12,... Rolls forward (see arrow F in FIG. 6).
For example, when the rotating body 5 moves forward together with the carriage 1 from the state of FIG. 6A to the states of FIG. 6B and FIG. 6C, the cam roller 18 rolls along the front rising inclined surface of the cam rail CR1. Thus, the rotating body 5 is rotated forward by the cam roller 18 driven by the cam rail CR1 (see arrow F in FIG. 6).

Then, before the cam roller 18 moves away from the front rising inclined surface of the cam rail CR1, as shown in FIG. 6D, the cam roller 17 rolls along the front rising inclined surface of the cam rail CR2 and is driven by the cam rail CR2. The rotating body 5 rotates forward by 17 (see arrow F in FIG. 6D).
Similarly, the rotating body 5 rotates forward while being successively taken over by the cam roller 16 driven by the cam roller CR3, the cam roller 15 driven by the cam roller CR4, and so on.

  Therefore, the belts 7 and 7 are wound up (see arrow E in FIG. 6), and the tension of the belts 7 and 7 causes the rollers 23 to move to the upper rear surface 21C of the link 21 and the lower rear surface 22D of the link 22. While moving in contact with the X-shaped symmetrical link 10 while being in contact, the rollers 24,... Are in contact with the upper front surface 22C of the link 22 and the lower front surface 21D of the link 21 while being in contact with the X-shaped symmetrical link 10. To the rear, and the object to be transported and the transport table 3 rise (see arrow UP in FIG. 3), so that the two-dot chain line in FIG. 3 and the high position H shown in FIG. Can do.

  For example, as shown in FIG. 1, the upper rear surface 21C of the link 21 and the lower rear surface 22D of the link 22 on which the rollers 23,... And the upper front surface 22C and the link 21 of the link 22 on which the rollers 24,. The shape of the lower front surface 21D is a curved shape when viewed from the left-right direction, and this curved shape is determined so that the ascending / descending speed of the transport table 3 is constant.

Next, another configuration example of the cart conveyor having the lifting function will be described.
FIG. 7 is a longitudinal front view showing the case where the height of the transfer table 3 is at the high position H, and FIG. 8 is a vertical front view showing the case where the height of the transfer table 3 is at the low position L. 3 differs only in the structure which drives the conveyance stand raising / lowering support means 4 by winding or feeding out the belts 7 and 7.
That is, the pulleys 19A and 19A are attached to the left and right shafts 22B and 22B supported so as to be slidable in the front-rear direction of the lower rear part of the left and right X-shaped symmetrical links 10 and 10, respectively. The belts 7 and 7 wound around the belts 6 and 6 are wound around the pulleys 19A and 19A, and are then hooked on the base 2 by the hooking member 19B.

Even with such a configuration, it is possible to drive the transporting platform lifting / lowering support means 4 by winding or unwinding the belts 7 and 7, and the cam rollers are provided on the lowering cam rails CR1, CR2,. 11, 12,... Are driven to reversely rotate the rotating body 5, so that the belts 7 and 7 are fed out, so that the object to be transported and the transport base 3 are lowered by their own weight (see arrow DN in FIG. 7). ), And the low position L shown in FIG.
Further, the belts 7 and 7 are wound up by rotating the rotating body 5 forwardly by driving the cam rollers 18, 17,... To the ascending cam rails CR 1, CR 2,. Then, the object to be conveyed and the conveying table 3 are raised by the tension of the belts 7 and 7 (see the arrow UP in FIG. 8), so that the high position H shown in FIG.

According to the above configuration, a plurality of cam rollers 11, 12,... Are attached to the rotating body 5 supported by the base 2 with the phase shifted in the circumferential direction and spaced apart in the left-right direction, and the cam rail installed on the ground. The rotating body 5 is rotated by following the cam rollers 11, 12,... To CR1, CR2,..., And the belts 7 and 7 wound around the pulleys 6 and 6 concentric with the rotating body 5 are wound or fed out. Since the table elevating support means 4 is driven, the elevating drive device and its control device are not required.
Further, since the conveyor base lifting / lowering support means 4 is driven by winding or feeding of the belts 7 and 7 wound around the pulleys 6 and 6 concentric with the rotating body 5 supported by the base 2, Since it is not necessary to provide a link for operation on the table elevating support means 4 and there is no restriction on the link configuration, a large elevating stroke can be easily secured while maintaining a low floor structure.

  In the above description, the case where the flexible long member is the belt 7 or 7 has been described. However, the flexible long member is not limited to the belt, and depending on the specifications such as the weight of the object to be conveyed, the flexible long member is used. For example, a wire or the like may be used as the member.

It is a vertical front view which shows the case where the height of a conveyance stand is a high position. It is also a plan view. It is a vertical front view which shows the case where the height of a conveyance stand is a low position. It is a perspective view which shows the example of a rotary body, a cam roller, and a cam rail. It is a principal part enlarged front view which shows the example in the case of rotating a rotary body backward and drawing out a flexible elongate member from a pulley, from the state of (a) which is an upstream side to the state of (d) which is a downstream side. The state which the rotary body is moving to the conveyance direction sequentially with the trolley | bogie is shown. It is a principal part enlarged front view which shows the example in the case of rotating a rotary body forward and winding a flexible elongate member around a pulley, and is the state of (d) which is a downstream from the state of (a) which is upstream. The state where the rotating body is sequentially moving in the transport direction together with the carriage is shown. It is a vertical front view which shows the case where the height of a conveyance stand is a high position in another structural example of a trolley | bogie conveyor. It is a vertical front view which similarly shows the case where the height of a conveyance stand is a low position.

Explanation of symbols

A Transport direction B Reverse rotation direction C Rotating shaft CR1, CR2, CR3, CR4, CR5, CR6, CR7, CR8 Cam rail D Feeding direction DN Lowering direction E Winding direction F Forward rotation direction H High position L Low position UP Up direction 1 Carriage 2 Base 3 Transport base 4 Transport base lifting support means 5 Rotating body 6 Pulley 7 Belt (flexible long member)
11, 12, 13, 14, 15, 16, 17, 18 Cam roller

Claims (1)

With respect to the base of the carriage that runs on the track laid along the transport path, the transport base lifting support means for supporting the transport base on which the object to be transported is vertically movable up and down is provided. A carriage conveyor having a lifting function that makes the height of the transfer table variable from a low position to a high position,
A rotating body supported by the base so as to be rotatable around a rotation axis in the left-right direction;
A plurality of cam rollers attached to the rotating body with a phase shifted in the circumferential direction and spaced apart in the left-right direction;
At predetermined locations on the conveyance path for raising and lowering the conveyance table, the plurality of cam rollers are respectively driven so that the rotating body rotates forward or backward in accordance with the traveling of the carriage, and is installed separately in the left-right direction. A plurality of cam rails,
A pulley fixed to the rotating body concentrically with the rotating shaft of the rotating body;
A flexible elongated member having one end fixed and wound around the pulley;
A carriage equipped with an elevating function, wherein the conveying table raising / lowering support means is driven to raise and lower the conveying table by winding or unwinding the flexible long member by forward rotation or backward rotation of the rotating body. Conveyor.

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