JP5496483B2 - Work carriage and transfer device using the same - Google Patents

Description

  The present invention relates to a work cart that includes a caster that rolls on a floor surface and performs work by placing a workpiece, and a conveyor having a conveyor using the work cart.

Conventionally, when assembling a plurality of parts to a work such as a heat exchanger, for example, a work transfer assembly apparatus as shown in Patent Document 1 is used. In this case, a slit is formed in the floor, a conveyor is laid in the slit, an engagement member is provided on a conveyor dog attached to the conveyor at a predetermined interval, and the bottom plate member of the carriage that can be moved by a caster on the floor surface. A push rod member extending downward through the slit is provided, and the carriage is transported on the floor surface by pushing the push rod member with the engaging member as the conveyor moves, and the parts mounted on the workpiece mounted on the carriage I was assembling.
JP 2003-285231 A

  On the other hand, in the process of assembling the parts to the workpiece, the work is performed in a predetermined unit time at the place where the conveyor is laid, and when the work is waiting at the place other than the place where the conveyor is laid, etc. In some cases, assembly work of parts is performed separately. However, in the conventional configuration as described above, since the push rod member provided on the carriage extends downward through the slit formed on the floor, there is a problem that the carriage cannot move to a place where no slit is formed. is there.

  Therefore, to realize the case where the work is carried out while being conveyed by the conveyor while the work is mounted on one carriage, and the case where the work is carried out separately by a manual push operation or the like while leaving the conveyor. There is a problem that can not be.

  The present invention has been made to solve the conventional technical problems, and includes a state in which conveyance by hand pressing or the like can be freely performed while leaving the conveyor, and a conveyor conveyance state in which conveyance is performed by the conveyor. Provided are a work carriage that can be realized smoothly and a transfer device using the work carriage.

The work carriage of the present invention is provided with a caster that rolls on the floor surface, and is for performing work by placing a work,
An engagement member for detachably engaging with a conveyor for conveyance is provided. The engagement member includes a base portion formed on the work carriage and an engagement portion extending in the extending direction of the base portion. The upper end of the engaging part is provided on the side opposite to the conveying direction of the conveyor of the base, and is rotatable to the base by its own weight around a horizontal rotation axis in a direction orthogonal to the conveying direction of the conveyor. The engagement member is inclined in a direction in which the lower end of the engagement member is lowered toward the opposite side of the conveyance direction by the conveyor with respect to the upper end, and when the lower end of the engagement member is in contact with the floor surface, When the lower end is in a retracted state where the lower end is retracted to a position higher than the lower end of the caster, and the lower end of the engaging member is lower than the floor surface, the lower end of the engaging member is rotated about the rotation axis. Move to the advanced state where you have advanced below the lower end of the caster. Characterized in that it is prohibited from rotating in the conveying direction of the conveyor in a state.

  According to a work cart of a second aspect of the present invention, in the above invention, in the advanced state, the lower end surface of the base and the upper end surface of the engaging member are in contact with each other, and the engaging member is prohibited from rotating forward. It is characterized by being.

  According to a third aspect of the present invention, there is provided a work carriage according to any one of the above-described aspects, wherein a plurality of engaging members are provided in a conveying direction by a conveyor.

  According to a fourth aspect of the present invention, there is provided the work carriage according to any one of the above inventions, wherein an engagement member side roller is provided at a lower end of the engagement member.

  According to a fifth aspect of the present invention, there is provided a transport device according to any one of the above-described inventions, a conveyor laid at a position lower than the floor, and an engagement member of the work cart that is attached to the conveyor at predetermined intervals. It is characterized by being comprised from the conveyance member which engages detachably.

According to the present invention, the working cart for carrying the work by placing the work on the floor surface is provided with the engaging member for detachably engaging with the conveyor for transportation. The engaging member includes a base portion formed on the work carriage and an engaging portion extending in the extending direction of the base portion, and an upper end of the engaging portion is provided on a side opposite to the conveying direction of the base conveyor. The engagement member is connected to the base so as to be rotatable by its own weight around a horizontal rotation axis in a direction orthogonal to the conveyance direction of the conveyor, and the engagement member has a lower end that is a conveyance direction by the conveyor. When the lower end of the engaging member is in contact with the floor surface, the lower end of the engaging member is retracted to a position higher than the lower end of the caster, and the lower end of the engaging member is inclined. When the position is lower than the floor, The lower end of the coupling member, the rotation shaft center is shifted to the advanced state that advances downward from the lower end of the caster is rotated in the, because it is prohibited from rotating in the conveying direction of the conveyor in such a state, the engaging member By using the retracted state in which the lower end of the caster is in contact with the floor surface and is retracted to a position higher than the lower end of the caster, it is possible to realize the use of manual push that can roll the caster in an arbitrary direction. Moreover, the conveyance state by the conveyor using the said engagement member is realizable by making the lower end of an engagement member into the advance state which advanced below the lower end of the caster.

  In particular, it is possible to easily realize a state corresponding to the use state by selecting the engaging member in the retracted state and the advanced state.

In this case, since the engaging member is pivotally connected by its own weight about the rotating shaft , the engagement member changes between a state where the lower end of the engaging member is in contact with the floor surface and a state where the lower end is lower than the floor surface. In this case, the engaging member can be automatically rotated to smoothly switch between the standby state and the advanced state.

  As a result, it is possible to smoothly realize a state in which conveyance by hand pressing or the like can be freely performed while leaving the conveyor and a conveyor conveyance state in which conveyance is performed by the conveyor.

  According to the invention of claim 2, in the above invention, in the advanced state, the lower end surface of the base and the upper end surface of the engaging member abut, and the engaging member is prohibited from rotating further forward. Therefore, when the conveyor is at a position lower than the floor surface, it automatically moves from the retracted state to the advanced state, and stable conveyance by the conveyor can be realized.

  According to the invention of claim 3, in each of the above inventions, the plurality of engaging members are provided in the conveying direction by the conveyor. Therefore, the conveying by the conveyor in a state where the plurality of engaging members are locked to the conveyor. Therefore, it is possible to eliminate the inconvenience that the work carriage is displaced laterally with respect to the transport direction.

  According to a fourth aspect of the present invention, there is provided a work carriage according to the above invention, wherein the engaging member side roller is provided at the lower end of the engaging member, so that the engaging member is retracted at a position above the lower end of the caster. Can move smoothly on the floor surface, reduce friction with the floor surface, and eliminate the load of conveyance.

  According to the transfer device of the invention of claim 5, the work cart according to any one of the above inventions, a conveyor laid at a position lower than the floor surface, and attached to the conveyor at predetermined intervals, Since the joint member is composed of a transfer member that is detachably engaged, the retracted engagement member that has been retracted to a position higher than the lower end of the caster is set to the advanced state in which the lower end of the caster is advanced downward, and the floor By engaging with a conveying member provided on a conveyor located at a position lower than the surface, the work carriage can be smoothly conveyed by the conveyor.

  Hereinafter, the conveyance apparatus S which employ | adopted the work trolley | bogie 1 of this invention is demonstrated with reference to drawings. FIG. 1 is a front view of the transport device S, FIG. 2 is a right vertical side view when the traveling direction of the work cart 1 is front, and FIG. 3 is a transport device when the traveling direction of the work cart 1 of FIG. 4 is a schematic side view of FIG. 3, FIG. 5 is a partially enlarged view of FIG. 1, and FIG. 6 is a partially enlarged view of FIG.

  The work carriage 1 in this embodiment is for carrying out work on a work assembly line by placing a work (not shown) such as a heat exchanger on a work mounting portion 3 provided on the upper part. The work carriage 1 includes column pipes 4 erected at four corners, a plurality of horizontal beam pipes 5 coupled between the column pipes 4, a work mounting portion 3 provided at the upper portion, and each column. The caster 6 is provided at the lower end portion of the pipe 4 and rolls on the floor surface F. In the present embodiment, a caster 6 that is movable on the floor surface F by rolling in the direction of 360 ° is employed.

  A plurality of work mounting portions 3 are connected to the upper part of the support pipes 4. In this case, two rows are provided, and the workpiece mounting portion 3 is configured by a plurality of workpiece mounting rollers 3 </ b> A provided rotatably in the front-rear direction. In the figure, 7 and 7 provided in the approximate center of the front and rear cross beam pipes 5 and 5 provided with the work mounting portion 3 are for arbitrarily operating the work carriage 1 by a manual push operation. It is a handle part.

  In the present embodiment, the lower horizontal beam pipe 10 connected to the lower portion of the support pipe 4 is provided only before and after being connected to the left and right, and a predetermined central portion of the lower horizontal beam pipe 10 on the front side is provided in a predetermined direction. In the present embodiment, a plurality of support pipes 8, 8 are connected across the rear lower cross beam pipe 10 at intervals. In this embodiment, it is assumed that the lower cross beam pipe and the support pipes 8 connected to the lower part of the support pipe 4 are provided vertically with a predetermined interval.

  The lower cross beam pipe 10 (in the present embodiment, the upper lower cross beam pipe 10 in the present embodiment) located on the front side in the traveling direction is located at the center between the support pipes 8, that is, at the center of the work carriage 1. The base 11 of the engaging member 20 is connected. Further, a connecting pipe 12 (shown only in FIG. 4) for connecting the supporting pipes 8 and 8 is provided at the rear of the supporting pipes 8 and 8 (upper supporting pipes 8 and 8 in this embodiment) in the traveling direction. The base portion 13 of the engaging member 21 is connected to the substantially central portion of the connecting pipe 12, that is, the rear side of the mounting member 11, similarly to the front side.

  Here, the detailed structure of the engaging member 20 (21) will be described. Since the engaging member 20 and the engaging member 21 have substantially the same configuration, the engaging member 20 will be described as an example. The engaging member 20 is a member for engaging the work carriage 1 detachably with a conveyor 30 for transportation, which will be described later in detail, and is opposite to the conveying direction by the conveyor 30 (advancing direction of the working carriage 1). The base portion 11 (base portion 13 in the case of the engagement member 21) formed to be inclined downward toward the head and the engagement portion 14 (engagement portion 15 in the case of the engagement member 21) extending in the extending direction of the base portion 11. It consists of.

  The upper end of the engaging portion 14 is provided on the side opposite to the conveying direction of the conveyor 30 (the traveling direction of the work carriage 1), and is a horizontal rotation shaft 16 (engaged in a direction perpendicular to the conveying direction of the conveyor 30). The joint member 21 is connected to the base 11 so as to be rotatable about a rotation shaft 17). As a result, the engaging portion 14 is rotatable from the advancing state in which the engaging portion 14 and the base portion 11 are substantially in a straight line with respect to the base portion 11 around the rotation shaft 16, and backward. In the advanced state of the engaging member 20, the upper end surface of the engaging portion 14 abuts on the lower end surface of the base portion 11, so that it does not rotate forward.

  Further, the lower end of the engaging portion 14 is rotatable about a horizontal rotation shaft 18A (in the engagement member 21, the rotation shaft 19A) in a direction orthogonal to the conveying direction of the conveyor 30. The engaging member side roller 18 (in the engaging member 21, the engaging member side roller 19) is provided. When the engaging member 20 is in the advanced state, the lower end of the engaging member 20 (that is, the lower end of the engaging member side roller 18) is a predetermined dimension from the lower end of the caster 6, and in fact, is placed on the conveyor 30. It is set as the structure extended below rather than the conveyance member 31 provided.

  The engaging portion 14 is rotatable about the rotation shaft 18 </ b> A by the weight of the engaging portion 14. For this reason, the engaging portions 14 and 15 provided in the engaging members 20 and 21 are arranged so that the work cart 1 is placed on the same floor surface (that is, when a groove 32 as will be described later is not formed). In the mounted state, as shown in FIG. 2, the engaging portion 14 and the base portion 11 rotate backward with respect to the base portion 11 as shown in FIG. Then, the lower ends (engagement member side rollers 18 and 19) of the engaging portions 14 and 15 are raised to the side opposite to the moving direction (the rear portion of the work cart 1 when the moving direction is the front side of the work cart 1). It will be in the standby state which contacted on the floor surface.

  From this standby state, the floor surface corresponding to the engaging members 20 and 21 disappears, that is, the floor surface corresponding to the lower ends of the engaging members 20 and 21 is lower than the floor surface F with which the lower ends of the casters 6 abut. Then, the engaging portions 14 and 15 are rotated downward about the rotating shafts 16 and 17 by the weight of the engaging portions 14 and 15. At this time, unless the lower ends of the engaging portions 14 and 15 are affected by the height of the floor surface or the like, the upper end surfaces of the engaging portions 14 and 15 abut against the lower end surfaces of the base portions 11 and 12, so that the front side thereof. The advancing state is prohibited from rotating.

  Next, the structure of the conveying apparatus S used in order to convey the work trolley | bogie 1 with which the workpiece | work was mounted is demonstrated. In the present embodiment, the transfer device S is provided in a facility where work assembling work or the like is performed, and a groove 32 is formed on the floor along a transfer path for transferring the work carriage 1. A conveyor 30 is laid in the groove 32 at a position lower than the floor surface F.

  The conveyor 30 in the present embodiment is conventionally disposed in the facility, and has a rail 37 having a substantially U-shaped cross section that opens to the upper surface below the floor F and a chain positioned on the upper surface of the rail 37. The belt 33, the roller 40 attached to the chain belt 33 at a predetermined interval, and a drive motor (not shown) that drives the chain belt 33 are configured. The chain belt 33 has a carriage conveying portion 33A having an upper surface formed from the work carriage 1 entry side end portion to the withdrawal side end portion of the conveyor 30, and the exit side end portion is a drive shaft (not shown). Evacuating further downward from the center, and circulates and moves through a return portion (not shown) that returns to the end portion on the entry side.

  And the conveyance member 31 for conveying the work trolley | bogie 1 with a predetermined space | interval is provided in the surface at the side which comprises the trolley | bogie conveyance part 33A of this chain belt 33. As shown in FIG. In the present embodiment, it is assumed that at least the conveying member 31 is provided at a position corresponding to the position between the engaging members 20 and 21 in the advanced state provided in the work carriage 1.

  In this embodiment, the conveying member 31 has a substantially L-shaped cross section comprising a front wall 31A facing the direction of travel of the conveyor 30 and a lower wall 31B extending rearward from the lower end of the front wall as shown in FIG. The rear end of the engagement member side roller 18 such as the engagement member 20 of the work carriage 1 that has entered the conveyor 30 abuts on the front surface of the front wall 31A of the transport member 31 and moves in the traveling direction. The engaging member 20 and the like of the work cart 1 are engaged with the conveyor 30 so as to be freely disengaged. Therefore, the upper end of the front wall 31A of the conveying member 31 is set to a height at which at least the engaging member 20 or the like to be engaged cannot easily get over, and is desirably a position lower than the floor surface F. .

  In FIG. 2, reference numeral 34 denotes a roller provided with an upper end positioned above the upper end (front wall 31 </ b> A) of the conveying member 31 by the mounting member 35. In this embodiment, every other conveying member 31 is provided. Is provided. This roller 34 is for preventing the conveyance member 31 from directly sliding on the anti-sag rail provided in the floor when the chain belt 33 is positioned at the return portion.

  With the above configuration, when the work cart 1 is transported by the transport device S, first, the work cart 1 is moved to the entry side end of the transport device S, and the front engaging member 20 provided on the work cart 1 is moved. Enter into the groove 32. In this case, the engagement portion 14 of the engagement member 20 of the work carriage 1 is provided at the lower end portion of the base portion 11 so as to be rotatable by the rotation shaft 16. Therefore, by entering the groove 32 from the height of the floor surface F, the floor surface F that has been in contact with the lower end of the engaging member 20 that has been in the retracted state that has been retracted to the position of the lower end of the caster 6 until then is Since the weight of the caster 6 is eliminated, it is rotated to the traveling direction side about the rotation shaft 16 by its own weight, and the advancing state is advanced downward from the lower end of the caster 6 whose lower end is in contact with the floor surface F.

  In the present embodiment, in the advanced state, the upper end surface of the engaging portion 14 abuts on the lower end surface of the base portion 11 and forward rotation is prohibited. Thus, in the present embodiment, when moving from the floor surface F to the conveyor 30 located at a lower position, the engaging member 20 automatically moves from the retracted state to the advanced state.

  In this state, with respect to the engaging member 20 that has entered the groove 32, the conveying member 31 of the conveyor 30 that moves in the conveying direction comes into contact with the rear surface of the engaging member 20 from the opposite side to the conveying direction, and the conveying of the conveyor 30 is performed. It is engaged by the driving force in the direction. Thereby, the work cart 1 as a whole is moved in the transport direction by the transport member 31 of the conveyor 30 moving in the transport direction, and is positioned on the opposite side of the transport direction of the work cart 1 that has been in contact with the floor surface F until then ( That is, when the transport direction is the front, the engaging member 21 (located at the rear portion of the work carriage 1) enters the groove 32.

  Similarly to the engagement member 20 as described above, the engagement member 21 moves from the floor surface F into the groove 32, thereby shifting from the retracted state to the advanced state, and between the engagement members 20, 21. The rear surface of the engaging member 21 is brought into an engaged state in which the rear surface of the engaging member 21 is supported and conveyed by the conveying member 31 formed on the conveyor 30 corresponding to the interval dimension.

  As a result, the work cart 1 has the engagement members 20, 21 provided at the front and back engaged with the transport member 31 of the conveyor 30 and moved in the transport direction, and the casters 6 provided at the four corners of the work cart 1 are floored. By rolling on the surface F in the transport direction, stable and smooth transport by the conveyor 30 can be realized.

  In particular, since there are a plurality of engaging members engaged with the conveying member 31 in the conveying direction by the conveyor 30, two in this embodiment, the engaging members 20, 21 are provided on the conveyor 30, respectively. Since the conveyance by the conveyor 30 is performed in the locked state, it is possible to eliminate the inconvenience that the work carriage 1 is laterally moved with respect to the conveyance direction.

  Further, even if the chain belt 33 extends horizontally, a step may occur at the joint portion, but the engaging members 20 and 21 are not perpendicular to the conveyor 30 but are provided obliquely. It is possible to effectively eliminate the inconvenience that the entire work carriage 1 is lifted by the step.

  When the work cart 1 is transported to the exit side end of the conveyor 30, the transport members 31, 31 that have been pressing the engaging members 20, 21 of the work cart 1 in the transport direction until then are in the floor. In order to move to the feedback section provided, the engaging members 20 and 21 are pushed in the transport direction by the inertial force so far, and move in the transport direction by a predetermined distance from the position where the conveyor 30 ends.

  At this time, the lower end of the engagement member 20 abuts the floor surface F with which the lower end of the caster 6 contacts by passing through the withdrawal side end of the conveyor 30, and the engagement portion 14 is centered on the rotation shaft 16. Is turned to the opposite side to the advancing direction to enter a retracted state in which the lower end contacts the floor F where the lower end of the caster 6 contacts. Similarly, the engaging member 21 provided at the rear portion of the work carriage 1 is also sequentially shifted from the advanced state to the retracted state.

  The work carriage 1 in which the engaging members 20 and 21 are in the retracted state can realize the use of manual push that can roll the caster 6 in an arbitrary direction without any trouble. At this time, since the engaging members 20 and 21 are provided with the engaging member-side rollers 18 and 19 at the lower ends, the retracted engaging members 20 and 21 retracted to the lower end position of the caster 6 are the floor surface F. Can be smoothly moved, friction with the floor surface F can be reduced, and the load of conveyance can be eliminated.

  In addition, since the engaging members 20 and 21 are inclined downward toward the opposite side to the transport direction in the retracted state, the engaging members 20 and 21 are located on the floor surface F even when used in a hand-held state. It can be set as the structure which is hard to catch on a protrusion etc., and it becomes possible to implement | achieve stable manual conveyance.

  As described above, in the work cart 1 of the present invention, the engaging members 20 and 21 that are detachably engaged with the transporting conveyor 30 have the lower ends of the lower ends of the casters 6 that roll on the floor surface F. The retracted state retracted to the position and the advanced state advanced downward from the lower end of the caster 6 can be changed according to the height of the floor surface F or the like with which the lower ends of the engaging members 20 and 21 abut. Therefore, it is possible to realize a state in which the conveyance by the conveyor 30 is appropriately performed smoothly and a state suitable for the hand-pressed state without any special operation to change the state of the engaging members 20, 21. Become.

  In addition, this invention is not limited to the said Example, For example, provided with the spring member always urged | biased so that it may extend to the perpendicular direction to the engaging members 20 and 21 provided in the working trolley 1, By enabling the engaging members 20 and 21 to move along the floor surface F and the inclined surface with a small step to the groove 32 of the conveyor 30, the height of the floor surface F or the like with which the lower end of the engaging member abuts is set. Depending on the situation, the engagement members 20 and 21 may be configured to be realized in a transport state by the conveyor 30 and a hand-pressed state.

  In addition, the engaging members 20 and 21 are provided with an operation member for performing a change operation so that the retracted state retracted to a position higher than the lower end of the caster 6 and the advanced state advanced below the lower end of the caster 6 can be selected. When the operator manually operates the member to manually convey the work carriage 1, the engaging member 20 or the like is set in the retracted state, and in the case of the conveying state by the conveyor 30, the engaging member 20 or the like. You may adopt what makes the advance state.

  In this case, when the lower end of the engaging member 20 is in the retracted state, the engaging member 20 can be further retracted to a position higher than the lower end of the caster 6 rolling on the floor F. It becomes possible to reduce the conveyance load due to contact with the surface F.

  By adopting the construction having the engaging member as described above in the work cart 1, not only when transporting by the conveyor 30 in the work assembly process, it is possible to easily realize manual transport. Improvement of convenience in the work process can be realized.

It is a front view of a conveying apparatus. It is a right vertical side view when the traveling direction of the work carriage is the front. It is a right vertical side view of the conveying apparatus when the traveling direction of the work carriage in FIG. 1 is the front. FIG. 4 is a schematic plan view of FIG. 3. It is the elements on larger scale of FIG. It is the elements on larger scale of FIG.

DESCRIPTION OF SYMBOLS S Transfer apparatus 1 Work carriage 4 Support pipe 5 Cross beam pipe 6 Caster 8 Support pipe 10 Lower cross beam pipe 11, 13 Base part 12 Connection pipe 14, 15 Engagement part 16, 17 Rotating shaft 18, 19 Engagement member side roller 20, 21 Engaging member 30 Conveyor 31 Conveying member 32 Groove 33 Chain belt 34 Roller 35 Mounting member 37 Rail

Claims (5)

A work cart equipped with a caster that rolls on the floor, and works with a work placed thereon,
An engagement member for releasably engaging with a conveyor for conveyance;
The engaging member includes a base portion formed on the work carriage and an engaging portion extending in an extending direction of the base portion, and an upper end of the engaging portion is a conveyance direction of the conveyor of the base portion. It is provided on the opposite side and is connected to the base so as to be rotatable by its own weight around a horizontal rotation axis in a direction orthogonal to the conveying direction of the conveyor ,
The engaging member is inclined in a direction in which a lower end thereof is lowered toward an opposite side to a conveying direction by the conveyor with respect to an upper end.
When the lower end of the engaging member is in contact with the floor surface, the lower end is in a retracted state where it is retracted to a position higher than the lower end of the caster,
When the lower end of the engaging member is in a position lower than the floor surface, the lower end of the engaging member is rotated around the rotating shaft and advanced to the lower side of the caster. A work cart characterized in that it is shifted, and in that state, rotation in the transport direction by the conveyor is prohibited.   The lower end surface of the base and the upper end surface of the engagement member are in contact with each other in the advanced state, and the engagement member is prohibited from rotating forward. Work cart as described.   The work cart according to claim 1, wherein a plurality of the engaging members are provided in a conveying direction by the conveyor.   The work cart according to any one of claims 1 to 3, wherein an engagement member side roller is provided at a lower end of the engagement member. A work cart according to any one of claims 1 to 4,
The conveyor laid at a position lower than the floor;
A transport apparatus, comprising: a transport member that is attached to the conveyor at a predetermined interval, and that engages and disengages an engagement member of the work carriage.

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