JP3903658B2 - Carriage with transfer means - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a carriage with transfer means that can be employed in a self-propelled carriage (unmanned carriage) that includes transfer means and can travel on a fixed route.
[0002]
[Prior art]
Conventionally, as a fall prevention device of this type, for example, a fall prevention device such as a hydraulic excavator found in JP-A-9-137468 has been provided. In other words, the fall prevention device swings out the outriggers from the left and right traveling body frames of the hydraulic excavator to temporarily widen the stance of the traveling body, and the bracket is fixed to the outside of the traveling body frame. A hydraulic cylinder is pivotally supported at the upper part, and an outrigger is pivotally supported at the lower part. The piston rod end of the hydraulic cylinder and the end of the outrigger are connected and pivotally supported, and the outrigger is opened and closed based on the expansion and contraction of the hydraulic cylinder.
[0003]
[Problems to be solved by the invention]
However, according to the above-described conventional configuration, the outrigger is opened and grounded by the extension operation of the hydraulic cylinder, and the grounded state is maintained by this hydraulic cylinder. Therefore, a strong hydraulic cylinder must be used. Thus, the entire fall prevention device is increased in size. Therefore, it can be employed without much trouble for a vehicle such as a hydraulic excavator that freely travels outdoors, but cannot be easily employed for a cart that can travel on a certain route in a factory, for example.
[0004]
In addition, since the fall prevention device is located outside the width of the traveling body frame even when the outrigger is closed, for example, when it is used for a cart that can travel on a certain route in a factory, the path width is widened. This is disadvantageous in terms of occupied area.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a carriage with transfer means that can make the whole fall prevention means compact.
[0005]
The third aspect of the present invention is to provide a cart with transfer means that can accommodate the means for preventing overturning during non-operation within the width of the cart body.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, the carriage with transfer means according to claim 1 of the present invention includes a carriage body that can travel on a fixed path, A fall prevention means is provided on the side of the carriage body in the protruding direction of the transfer means, and this fall prevention means is provided on the side frame side so as to be movable up and down via a four-link mechanism. a movable body locking concave freely in and top movement between the outer positions lowered ground rose Hanarechi inside position are formed, a moving device for moving the movable body, lowered grounded outside position The locking device has a vertical hydraulic cylinder attached to the side frame side, and this locking device is provided for the locking recess in the movable body at the outer position that is descended and grounded. Hydraulic series By applying the downward force by fitting contact a downward piston rod of the loaders from above, in which characterized in that it is configured to lock the movable member.
[0007]
Therefore, according to the invention of claim 1, the carriage with transfer means is in a state in which the transfer means is retracted (paid) on the carriage body, and the movable bodies of all the fall prevention means are raised and separated. It can travel on a certain route. At this time, if the transfer means supports the object to be transported, the transport travels. If not, the transport means travels idle. In order to lift and move the movable body at that time , first, the piston rod is lifted by the contraction of the hydraulic cylinder to release the lock by the locking device, and then the movable body is moved via the four-link mechanism by the operation of the moving device. and raised Hanarechi Te performed by moving inward.
[0008]
Then, after the carriage with transfer means is stopped at the transfer location, prior to the projecting movement of the transfer means, first, at least the movable body of the fall prevention means on the projecting side of the transfer means is moved down to ground. That is, the movable body can be lowered and moved outward through the four-link mechanism by the reverse operation of the moving device. Next, the movable body is locked by the lock device by lowering the piston rod by the extension movement of the hydraulic cylinder and fitting and contacting the piston rod with the locking recess to apply the downward force . By operating the transfer means in this state, the object to be conveyed supported on the cart body side can be lowered, or the object to be conveyed can be loaded on the cart body side.
[0009]
Further, the carriage with transfer means according to claim 2 of the present invention is the structure according to claim 1, wherein the transfer means can be protruded laterally with respect to the carriage body, and the fall prevention means is the carriage. It is provided on both sides of the main body.
Therefore, according to the invention of claim 2, by moving the transfer means on both sides, it is possible to load and unload the objects to be transported with the stations provided on both sides of the fixed path.
[0010]
And the cart with transfer means according to claim 3 of the present invention is the configuration according to claim 1 or 2, wherein the movable body is positioned within the width of the cart body at the inside position where it has been lifted and separated, The lower end grounding portion is positioned outside the width of the carriage main body when the outer position is descending grounding.
Therefore, according to the third aspect of the present invention, the movable body can be lifted and separated by positioning all of the fall prevention means including the lower end grounding portion within the width of the carriage body. This can be done by placing the bottom-end grounding part outside the width of the cart body.
[0011]
Furthermore, the carriage with transfer means according to claim 4 of the present invention is the structure according to any one of claims 1 to 3, wherein the tipping prevention means is at least transferred prior to the protruding movement of the transfer means. The movable body is lowered and grounded on the projecting side of the means.
Therefore, according to the invention of claim 4, after the movable body of the fall prevention means is lowered and grounded, the transfer means can project.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings as a state adopted in a self-propelled cart (unmanned cart).
1 to 4, a self-propelled cart (an example of a cart with transfer means) 10 is provided with a pair of left and right wheels 12 at the front and rear at the lower part of the cart body 11, and at least some of these wheels 12 are The vehicle is configured to be rotated forward and backward by a travel drive device (not shown). The self-propelled carriage 10 is configured to automatically run on the fixed route 1 by detecting, for example, a derivative provided on the floor 2 side with a pickup coil (both not shown). .
[0013]
The bogie main body 11 has a pair of left and right side frames 13 positioned inside the vehicle body width W. The side frames 13 have a rectangular tube shape, and dovetail groove portions 14 are formed on the four surfaces of the outer periphery thereof. Is formed.
A transfer means 20 is provided in the upper and lower intermediate positions of the cart body 11 so as to be able to project on both sides in the lateral direction with respect to the cart body 11. The transfer means 20 is, for example, a multi-stage fork type, and includes a base frame 21 that is movable up and down with respect to the carriage main body 11 by operation of an elevating device (not shown), and the base frame. An intermediate stage fork body 22 provided so as to be freely retractable in the lateral direction with respect to the body 21; an action stage fork body 23 provided so as to be freely retractable in the lateral direction relative to the intermediate stage fork body 22; The retraction device 24 is used. On the working stage fork body 23, a receiving portion 25 capable of supporting the object to be conveyed is provided.
[0014]
A fall prevention means 30 is provided on the side of the carriage body 11 in the protruding direction of the transfer means 20. That is, the fall prevention means 30 is provided in a total of four places at the positions distributed on both sides of the carriage main body 11 and back and forth via the side frame 13.
These fall prevention means 30 have the same configuration, and as shown in FIGS. 1, 5, and 6, a movable body 31 that is movable between an inner position that is raised and separated and an outer position that is lowered and grounded, The moving device 41 is configured to move the movable body 31 and the locking device 51 that locks the movable body 31 at the outer position that is lowered and grounded.
[0015]
Here, the movable body 31 includes a long vertical plate portion 31a, an upper plate portion 31b extending inward from the upper end of the vertical plate portion 31a, a lower plate portion 31c extending outward from the lower end of the vertical plate portion 31a, The plate portion 31c is formed in a link plate shape with a lower end grounding portion 31d extending downward from the outer end of the plate portion 31c.
An L-shaped bracket 32 is provided so that its position can be changed in the front-rear direction via a connector (bolt nut) 15 using a dovetail groove portion 14 between the outer surface and the lower surface of the side frame 13. A pair of upper and lower links 35 and 36 are provided on the outer surface of the L-shaped bracket 32 so as to be swingable in the vertical direction via front and rear direction pins 33 and 34, respectively.
[0016]
These links 35 and 36 are provided in the front and rear pairs, and the vertical plate portion 31a of the movable body 31 is positioned between the free ends of the front and rear pairs and is relatively swung through the front and rear direction pins 37 and 38, respectively. It is connected freely. A lock recess 39 is formed on the inner upper surface of the upper plate 31b of the movable body 31.
Thereby, the movable body 31 is provided on the side frame 13 side through a four-link mechanism composed of both links 35, 36, etc., so that it can move up and down. 11 is positioned within the vehicle body width W (see FIG. 2), and the lower end grounding portion 31d is positioned outside the vehicle body width W of the carriage main body 11 (see FIG. 1) when it is in the outer position where the ground is lowered. ing.
[0017]
A moving device 41 for moving the movable body 31 includes a forward / reverse drive motor 42 fixed to the L-shaped bracket 32 side and a cam body 44 attached to an output shaft 43 in the front-rear direction of the forward / reverse drive motor 42. And this cam body 44 is comprised from the rod body 45 etc. which act from the downward direction. The rod body 45 is fixed to the upper end of the vertical plate portion 31a in the movable body 31.
[0018]
The locking device 51 includes an L-shaped bracket 52 provided so that its position can be changed in the front-rear direction via a connector 16 using the dovetail portion 14 on the upper surface of the side frame 13, and the L-shaped bracket 52. It is composed of a vertical hydraulic cylinder 53 attached to the outer surface. Therefore, the locking device 51 locks the movable body 31 by fitting and contacting the downward piston rod 54 of the hydraulic cylinder 53 with the locking recess 39 in the movable body 31 at the outer position where the ground is lowered. It is configured to be able to.
[0019]
The self-propelled carriage 10 having the above-described configuration conveys a roll-shaped object (an example of an object to be transported) 5, and a core body 6 protrudes from both sides of the center of the roll-shaped object 5 and passes therethrough. Yes. The self-propelled carriage 10 is configured to be able to support the outer peripheral surface of the roll-like object 5 via a receiving portion 25 provided on the action stage fork body 23.
A locking support base 60 and a mounting support base 65 are provided at predetermined positions on the side of the fixed path 1. Here, the locking type support base 60 includes a base base 61, a pair of locking bodies 62 erected from the base base 61, a locking recess 63 formed at the upper end of the locking bodies 62, and the like. It is comprised and the core 6 is latched by both the recessed parts 63 for latching from upper direction, and it is comprised so that the roll-shaped thing 5 may be supported.
[0020]
Further, the mounting type support base 65 includes a pair of standing mounting bodies 66 and a mounting receiving portion 67 provided at the upper end of the mounting bodies 66. The roll-like object 5 is configured to be supported by placing the roll-like object 5 from above.
As shown by the solid lines in FIGS. 3 and 4, the working stage fork body 23 of the transfer means 20 can enter between the mounting bodies 66, and as shown by the phantom lines in FIGS. In addition, the working stage fork body 23 is configured to be able to enter between the two locking bodies 62. As shown by an imaginary line in FIG. 4, for example, the fire shutter 3 can be lowered between the fixed path 1 and the locking support 60.
[0021]
The operation in the above embodiment will be described below.
The self-propelled carriage 10 has the transfer means 20 retracted (paid) on the carriage main body 11 and the movable bodies 31 of all the fall prevention means 30 are lifted and separated as shown in FIG. Thus, by rotating the wheel 12 forward and backward, it is possible to automatically run forward and reverse on the fixed route 1 while detecting the derivative by the pickup coil. At this time, the self-propelled carriage 10 travels to transport the roll-shaped object 5 if the receiving part 25 supports the roll-shaped object 5, and receives the roll-shaped object 5 if the receiving part 25 is empty. It ’s going to go.
[0022]
As described above, to move the movable body 31 up and away, first, the piston rod 54 is lifted by the contraction movement of the hydraulic cylinder 53 to release the lock by the lock device 51, and then the cam is driven by the forward drive of the forward / reverse drive motor 42. The body 44 is rotated from the state of FIG. 6 as shown in FIG. Accordingly, the cam body 44 is caused to act on the rod body 45 from below, and the rod body 45 is moved in a lifting shape.
[0023]
Then, the movable body 31 integral with the rod body 45 is provided on the side frame 13 side through a four-link mechanism including both links 35, 36, etc., so that the movable body 31 can be lifted by the above-described lifting. As shown in FIG. 2, 31 is lifted and moved inward while raising both links 35 and 36. As a result, in a state where the movable body 31 is lifted and grounded to the inner position, all of the fall prevention means 30 including the lower end grounding portion 31d can be positioned within the vehicle body width W of the carriage main body 11.
[0024]
Therefore, traveling on the fixed route 1 can be performed in a state where the overturn prevention means 30 in the non-operation state is accommodated within the width of the cart body 11, that is, without causing the overturn prevention means 30 to protrude from the vehicle body width W. It is advantageous in the occupied area and the like without widening the route width of the fixed route 1, and for example, the fall prevention means 30 can be easily adopted in the self-propelled carriage 10 that can run on the fixed route 1 in the factory.
[0025]
Then, in a state where the self-propelled carriage 10 is stopped to the side of the locking type support base 60 and the mounting type support base 65, first, at least the protruding side of the transfer means 20 prior to the protruding movement of the transfer means 20. The movable body 31 of the fall prevention means 30 is moved down and grounded. That is, the cam body 44 is rotated from the state of FIG. 7 as shown in FIG. 6 by the reverse drive of the forward / reverse drive motor 42. As a result, the cam body 44 is allowed to escape downward with respect to the rod body 45.
[0026]
Then, the movable body 31 integral with the rod body 45 is lifted by the above-described relief action, and thus, by its own weight, it is passed through a four-link mechanism composed of both the links 35 and 36, that is, both the links 35 and 36. As shown in FIG. 1, it is moved downward and moved outwardly while moving sideways. Thereby, in the state where the movable body 31 is lowered and grounded, the lower end grounding portion 31 d can be positioned outside the vehicle body width W of the carriage body 11. At this time, the locking recess 39 faces the piston rod 54 from below.
[0027]
Next, the piston rod 54 is lowered by the extension movement of the hydraulic cylinder 53 and is engaged with the locking recess 39 to apply a lowering force to the movable body 31. Therefore, as shown in FIGS. Locking is performed by the lock device 51.
In this state, a fork operation for moving the working stage fork body 23 in the lateral direction by operating the fork retracting / retracting device 24 and a lift operation for moving the base frame 21 up / down by operating the lifting / lowering device, By appropriately carrying out the process in succession, the roll-like object 5 supported by the self-propelled carriage 10 is transferred to the locking type support base 60 or the mounting type support base 65, or the locking type support base 60 or the mounting type. The roll-like object 5 supported by the support base 65 can be moved to the self-propelled carriage 10.
[0028]
Such a transfer operation of the roll-like object 5 by the transfer means 20 is performed by projecting the action stage fork body 23 outside the vehicle body width W as shown by the solid line or the virtual line in FIG. 3 or FIG. At this time, as described above, the fall prevention means 30 lowers the movable body 31 to bring it to the outer position, and places the lower end grounding portion 31d outside the vehicle body width W of the carriage main body 11 and the position and posture of the movable body 31. Even if the operation amount (fork reach) of the transfer means 20 is long due to being locked by the lock device 51, and even if the load of the roll-like object 5 is heavy, it is self-propelled due to the uneven load. It is possible to reliably prevent the cart 10 from falling.
[0029]
In addition, it is not necessary to employ a very strong fall prevention means 30 including the movable body 31, the moving device 41 that moves the movable body 31, and the lock device 51 that locks the movable body 31, The whole can be configured compactly, and thus can be easily adopted in the self-propelled cart 10 that can travel on the fixed route 1 in the factory.
In addition, there is no hard engagement with the ground side, and the adjustment is easy. Particularly when the number of ground side stations such as the locking type support base 60 and the placement type support base 65 is large, the effect of cost reduction becomes remarkable.
[0030]
According to the configuration in which the transfer means 20 including the movable body 31, the moving device 41, the lock device 51, and the like is provided in the self-propelled carriage 10 as in the above-described embodiment, the floor side (floor 2 side) is prevented from falling. It is possible to reliably prevent overturning without providing a dedicated receptacle or the like, and can sufficiently cope with slight variations in floor level.
As in the above-described embodiment, when the movable body 31 is connected by the four-link mechanism and the hydraulic cylinder 53 that acts on the movable body 31 from above is employed as the locking device 51, the reaction force from the floor side is increased. Then, it is transmitted to the hydraulic cylinder 53 as it is, and can be locked efficiently.
[0031]
In the above-described embodiment, the transfer means 20 is configured to be able to protrude on both sides in the lateral direction with respect to the cart body 11, but this may be of a type that can protrude only on one side. In this case, the fall prevention means 30 may be provided only on one side of the carriage body 11.
In the above-described embodiment, the forward / reverse drive motor 42 or the like is employed as the moving device 41 that moves the movable body 31, but this may be a solenoid type, a rack and pinion type, or the like.
[0032]
In the above-described embodiment, the movable bodies 31 in all the fall prevention means 30 are moved down to ground prior to the projecting movement of the transfer means 20, but this is a fall on the projecting side of the transfer means 20. Only the movable body 31 of the prevention means 30 may be moved down and grounded.
[0033]
【The invention's effect】
According to the first aspect of the present invention described above, the loading and unloading work of the object to be transferred by the transfer means is performed by projecting the acting body of the transfer means to the outside of the width. At this time, the fall prevention means lowers the movable body. it is possible to the outer position by the ground, the position of the movable body, Ru can be locked by a locking device attitude. That is, the movable body is moved downward and moved outward by the four-link mechanism by the moving device, and then the piston rod is lowered by the extension movement of the hydraulic cylinder and fitted into and brought into contact with the locking concave portion to generate the downward force. By providing, it can be locked by the locking device, and the reaction force from the floor side is transmitted to the hydraulic cylinder as it is, so that it can be locked efficiently. Therefore, even if the operation amount of the transfer means is long, and even if the load on the transported object is heavy, it is possible to reliably prevent the cart with transfer means from falling due to the offset load.
[0034]
Moreover, the fall prevention means comprising the movable body, the moving device that moves the movable body, and the lock device that locks the movable body does not need to be so strong, and can be configured compactly as a whole. Therefore, it can be easily adopted for a carriage with transfer means that can travel on a certain route in the factory. Further, there is no hardware connection with the ground side, adjustment is easy, and the effect of cost reduction becomes remarkable especially when the number of ground side stations is large.
[0035]
Further, according to the second aspect of the present invention described above, by moving the transfer means on both sides, it is possible to load and unload the objects to be transferred to and from the stations provided on both sides of the fixed path.
According to the third aspect of the present invention described above, the traveling on the fixed route is performed in a state where the overturn prevention means when not in operation is accommodated within the width of the carriage main body, that is, the overturn prevention means protrudes from the vehicle body width. Therefore, it is advantageous in terms of occupied area, etc., because it does not take a wide route width of a certain route, for example, a self-propelled cart that can run on a certain route in a factory can easily adopt a fall prevention means it can.
[0036]
Further, according to the fourth aspect of the present invention, after the movable body of the fall prevention means is moved down and grounded, the transfer means can be protruded and a stable operation can always be expected.
[Brief description of the drawings]
FIG. 1 shows an example of an embodiment of the present invention, and is a longitudinal front view of a cart with transfer means when the overturn prevention means part protrudes outward.
FIG. 2 is a longitudinal front view of the cart with transfer means when the tipping prevention means part is retracted inward.
FIG. 3 is a plan view of the carriage with transfer means.
FIG. 4 is a front view of the carriage with transfer means.
FIG. 5 is a side view of the cart with transfer means when the overturn prevention means part protrudes outward.
FIG. 6 is a longitudinal front view of the carriage with the transfer means when the moving device part protrudes outward.
FIG. 7 is a longitudinal front view of the carriage with the transfer means when the moving device part is retracted inward.
[Explanation of symbols]
1 Fixed path 5 Rolled object (conveyed object)
10 Self-propelled cart (cart with transfer means)
11 Carriage body 13 Side frame 20 Transfer means 23 Action stage fork body 25 Receiving part 30 Fall prevention means 31 Movable body 31d Lower end grounding part 32 L-shaped bracket 35 Link 36 Link 39 Locking recess 41 Moving device 42 Forward / reverse drive Motor 44 Cam body 45 Rod body 51 Locking device 53 Hydraulic cylinder 54 Piston rod 60 Locking type support base 65 Mounting type support base W Body width

Claims (4)

The carriage main body that can travel on a fixed route is provided with transfer means that can protrude in the lateral direction, and a fall prevention means that is positioned on the side of the carriage main body in the protruding direction of the transfer means. The prevention means is provided on the side frame side through the four-link mechanism so as to be movable up and down, so that it can move between the rising and separating inner position and the outer position where it is lowered and grounded , and the locking recess on the upper surface. The movable body is formed, a moving device for moving the movable body, and a lock device for locking the movable body at an outer position that is lowered and grounded . The lock device is attached to the side frame side. By having a hydraulic cylinder in the vertical direction and fitting and abutting a downward piston rod of the hydraulic cylinder from above to the locking recess in the movable body at the outer position that is lowered and grounded, Transfer means carriages, characterized in that the is configured to lock the movable member.   2. The carriage with transfer means according to claim 1, wherein the transfer means can freely protrude on both sides in the lateral direction with respect to the carriage main body, and the fall prevention means is provided on both sides of the carriage main body.   The movable body is positioned within the width of the cart body at an inner position where the movable body is lifted and separated, and a lower end grounding portion is positioned outside the width of the cart body at an outer position where the movable body is lowered and grounded. A cart with transfer means according to 1 or 2.   The transfer means according to any one of claims 1 to 3, wherein the fall prevention means is configured such that the movable body is moved down and grounded at least on the protruding side of the transfer means prior to the protrusion movement of the transfer means. With trolley.

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