JP2003251575A - Method and equipment for cell production, and working truck for cell production - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the productivity in a cell production system, and to lighten the fatigue of a worker. <P>SOLUTION: When producing a product by moving a working truck 10 along a production line 1 to circulate through steps A to E, and performing the works in the steps A to E on one working truck 10, the height of a working table is adjusted, and the work is performed in each step while operating an elevating/ lowering means by the worker as necessary by using the working truck 10 comprising a base part having a plurality of traveling wheels, the working table to perform the work thereon, and an expandable elevating/lowering stay part having the elevating/lowering means which is interposed between the base part and the working table. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cell production method for moving a work trolley along a production line to assemble and inspect products on the work trolley, the cell production equipment, and a work trolley for cell production.

[0002]

2. Description of the Related Art Conventionally, a conveyor line is arranged along a plurality of processes to feed a main frame of a product, and an operator in charge of each process attaches parts to the main frame, assembles, inspects, packs, etc. The line production system has a problem that it takes a lot of time to change the types of products, and it is not possible to cope with the recent demand for small-lot production of various types.
Therefore, instead of this line production system, a cell production system in which one worker takes charge of a plurality of processes or all processes including assembly, inspection and packing is being adopted.

In this cell production system, a plurality of process parts are provided along the production line, and while the work carriage is moved along the production line, products are sequentially assembled, inspected and packed on the work carriage. is there.

[0004]

A conventional hand-held wagon trolley is conceivable as a work trolley to be used in the cell production system. However, although this wagon trolley does not have a problem with maneuverability, it has a structure that the height adjustment of the table can not be operated in a short time, so the height of the table and the table height suitable for the work content can be adjusted in advance before the work. It has only stopped setting. For this reason, depending on the work, work from all directions, such as attaching parts from above or inserting hands from the bottom into the product body placed on the table, is performed on the table that is maintained at a constant height. I have to do it in. For this reason, there is a problem that the worker is fatigued and the productivity is lowered. In addition, a normal wagon trolley has a table supported on the base portion having casters via columns at four corner positions, and depending on the work posture, a part of the body such as a worker's knee touches the column, There is also a problem in that an unnatural posture may be forced, and the work posture is limited, which causes fatigue.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a cell production method, a cell production facility and a cell production work cart capable of improving productivity in a cell production system and reducing fatigue of workers. And

[0006]

In order to achieve the above-mentioned object, a cell production method according to a first aspect of the present invention is such that a work carriage is moved along a production line that goes around each process section, and one work carriage is mounted on the work carriage. When a product is produced by performing work over a plurality of process parts, a base part having a plurality of traveling wheels, a work member for performing work, and an elevating operation means interposed between the base part and the work member. A work trolley provided with a retractable elevating column part is used, and an operator operates the elevating operation means to adjust the height of the work member as necessary, and performs work in each process section. .

According to the above construction, since the height of the working member can be easily adjusted at each work position by the elevating operation means, the work can be carried out at the height position most suitable for the work in each process section. It is possible to improve productivity and reduce worker fatigue.

The invention according to claim 2 is provided with a production line formed along a plurality of process parts and a work carriage movable along the production line, and a plurality of work carriages can be mounted on one work carriage. A cell production facility for performing work over a process section to produce a product, wherein the work carriage is a lifting operation means interposed between a base portion, a work member for performing the work, and the base portion and the work member. And an elevating and lowering support column portion having.

According to the above construction, since the work carriage can easily adjust the height of the work member at each work position by the elevating operation means, the work carriage can be adjusted at the height position most suitable for the work in each process section. Work can be performed, productivity can be improved, and worker fatigue can be reduced. In addition, there are no obstacles around the elevating column, a free working posture can be secured, and fatigue does not occur.

The cell production work carriage according to claim 3 comprises a production line formed along a plurality of process parts, and a work carriage movable along the production line. A work carriage for cell production for performing a work on a plurality of process parts above to produce a product, wherein the work carriage has a base portion having a plurality of traveling wheels and a lifting column having a retractable lifting operation means. And a work table, and the height of the work table can be adjusted by operating a lifting operation means by a worker for each work of each process section.

According to the above construction, since the worker can easily adjust the height of the work table at each work position by the elevating operation means, the work can be performed at the height position most suitable for the work in each process section. Therefore, it is possible to improve productivity and reduce worker fatigue. Further, since the work cart composed of the base portion, the lifting support portion and the work table is used, the space between the base portion and the work table reduces the range of contact with the obstacle during traveling, and smooth traveling can be expected. Further, this space portion can be used as an installation space for auxiliary shelves and trays, and there are no obstacles around the elevating pillar portion, so that a free working posture can be secured and fatigue does not occur.

[0012] According to a fourth aspect of the present invention, in the work cart for cell production according to the third aspect, the elevating and lowering strut is fixed to the base and a fixed strut is fixed to the work table and slid on the fixed strut. The movable supporting column is freely fitted, and a linear drive mechanism with a restraining mechanism that is built into both the supporting columns to bias the work table in the upward direction and restrain the biasing force. The fixing release member is capable of releasing the restraint mechanism, and the stepping lowering mechanism is capable of lowering the work table via the movable support.

According to the above construction, the elevating column part can have a simple structure even though the elevating column part is provided with the linear drive mechanism for urging only upward. Further, by releasing the restraint mechanism with the fixing release member, the linear drive mechanism is advanced to raise the work table, and the restraint mechanism is operated at an arbitrary position to fix the work table. Further, while releasing the restraint mechanism by the fixing release member, the foot-operated lowering mechanism is operated to lower the work table. Thereby, the height of the work table can be adjusted to an arbitrary position with a simple operation.

The work vehicle for cell production according to a fifth aspect of the present invention is the vehicle trolley according to the fourth aspect, wherein the elevating column portion has a ridge provided along one of the fixed column and the movable column along the vertical direction.
A detent mechanism, which is provided on the other side and is formed of an engaging concave portion that engages with the ridge, is provided, and a predetermined vertical interval is provided between the fixed strut and the movable strut, or between the fixed strut and the elevating member of the linear drive mechanism. An up-down guide member for guiding the up-and-down movement is provided, and at least one of the up-and-down guide members is formed by an up-and-down guide roller that abuts from at least three sides with an elevation axis at a predetermined angle.

According to the above construction, the rotation stopping mechanism allows
The work table can be firmly held to support the rotation moment generated by external force from the surroundings, and by configuring one of the upper and lower guide members with lifting guide rollers that abut from three sides, you can step on the foot even when a horizontal load is applied. The work table can be smoothly lowered by the formula lowering mechanism, and stable work can be performed on the work table.

According to a sixth aspect of the present invention, there is provided a work cart for cell production according to the fourth aspect, wherein the foot-operated lowering mechanism has a fulcrum supported by the base portion to be rotatable in the vertical direction and has a predetermined free end side. A lowering operation lever that pushes down the movable column by an operating portion that is provided at a position, an upper pedal that is provided at a free end portion of the lowering lever, and a lower pedal that is provided at the lowering lever below the upper pedal. It is composed of.

According to the above construction, since a so-called boosting mechanism is constructed in which the lowering operation lever is depressed by the pedal at the free end portion and the movable strut is pushed down by the operating portion with a large force, the work table is lowered with a small stepping force. You can At the free end of the lowering lever, which doubles the stroke, the upper pedal and the lower pedal are provided so that the upper pedal can be depressed next to the lower pedal to push down the lowering lever in two steps. It is possible to remarkably improve the operability of the descending operation lever that is configured.

In the cell production work carriage according to claim 7, in the structure according to any one of claims 3 to 6, at least one lock member is pressed against the traveling surface by a foot-operated carriage lock lever on the base portion. It is provided with a carriage lock means capable of fixing the work carriage.

According to the above-mentioned structure, the work carriage can be stably stopped at the predetermined position by the carriage lock means, and the work on the work table can be accurately performed. The work vehicle for cell production according to claim 8 is the structure according to claim 7, wherein the traveling wheels of the base portion are a fixed wheel whose traveling direction is fixed and a free wheel whose traveling direction can be changed. It is configured such that the fixed wheel and the lock member form a polygonal vertex of a triangle or more on the running surface.

According to the above construction, the lock member and the fixed wheel effectively support the external force applied to the work carriage from all directions, the reaction force generated at the time of assembly, and the rotation moment.
The work carriage can be stably held at the stop position, and workability can be further improved.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Here, embodiments of a cell production method, cell production equipment, and a cell production work carriage according to the present invention will be described with reference to FIGS.

As shown in FIG. 12, this cell production facility has, for example, first to third parts for assembling in the production area.
Process parts A, B, C and fourth and fifth process parts D, E for inspecting products are arranged. Then, each worker pushes the work carriage 10 to move it along the production line 1 that goes through the first to fifth process parts A to E, and in the first to third process parts A, B, and C,
Work cart 2 that takes out the necessary parts from the necessary parts shelf 2
The product is assembled above, and the product is inspected on the work carriage 2 by the inspection device 3 in the fourth and fifth process parts D and E. Finally, the packing work is performed in the product packing area Fa.

That is, the first to fifth process parts A to E are, for example, substantially circular assembly areas Aa to Ca adjacent to each other in the process order.
In the product evaluation areas Da and Ea, a plurality of component shelves 2 are installed at a predetermined pitch along the circumferential direction, components, assembly jigs, and the like are placed, and each area Aa to Ea has a substantially arc shape. A production line 1 is provided.

As shown in FIG. 1, the work carriage 10 is provided with a work table 14 on a base portion 12 via a telescopic lift column 13, and the work column 14 is moved up and down by the lift column 13. Elevating operation means 15 is provided.

In this cell production facility, each worker manually pushes the work carriage 2 to move on the production line 1 along each process section A to E. The worker who enters the main assembly area Aa of the first process unit A sequentially takes out the parts from the parts shelf 3 and assembles them on the work carriage 2. At this time, the lifting / lowering operation means 15 is operated according to the work content, and the work table 14
Adjust the height of to the optimum height. Then, the main assembly area Ba of the process section B and the main assembly area Ca of the third process section C are moved to complete the assembly.

Further, the product evaluation area D of the fourth process section D
The work cart 2 is moved to a, the products are sequentially inspected by the inspection device 4, and the product evaluation area D of the fifth process unit D is further added.
The product is also inspected in a. Also at this time, the work table 14 is adjusted to the optimum height. First to fifth process section A
Assembling work and inspection work in E to E are completed, and then products are packed in the packing area Fa. Here, the assembly inspection of the first to fifth process parts A to E is performed by one worker, but the work of the first to fifth process parts A to E shared by a plurality of workers can be shared. .

In the embodiment of FIG. 12, the production line 1 that moves in a circle is shown, but as shown in FIG.
Each area Aa to Ea of the first to fifth process parts A to E is formed in a rectangular shape, or as shown in FIG. 14, each area Aa to Ea of the first to fifth process parts A to E is linearly formed. The production lines 1A and 1B can be formed and connected to each other, and these circular, rectangular, and linear areas can be combined. In addition, in FIGS. 12 to 14, the packaging process unit is arranged at the end outside the production line 1, but it may be provided continuously on the production line 1 to the fifth process unit E.

Next, an embodiment of a work carriage used in the cell production facility will be described with reference to FIGS.
As shown in FIGS. 1 to 4, the work carriage 10 includes a base portion 12 having a plurality of traveling wheels 11 </ b> A and 11 </ b> B, a work table (working member) 14, and the base portion 12 and the work table 14. It is composed of a single elevating column part 13 that is interposed between the elevating column and the elevating column, and elevating operation means 15 that can adjust the height of the work table 14 by expanding and contracting the elevating column part 13.

At the lower part of the work carriage 10, for example, two lock members 1 are provided by a foot-operated carriage lock lever 17.
Cart lock means 1 that can be fixed by pressing 8 onto the traveling surface F
6 is provided. The traveling wheels 11A and 11B provided on the base portion 12 are mounted on a pair of left and right fixed wheels 11A arranged at the front part and fixed in a constant traveling direction, and are mounted rotatably around a vertical axis to travel. It is composed of a free wheel (so-called caster) 11B whose direction can be changed.

The trolley lock means 16 is a work trolley 10.
To stop the vehicle on the traveling surface F, it is sufficient to press one locking member 18 on the traveling surface F. However, it is desirable to stop more stably in consideration of the load applied to the traveling carriage during work. Therefore, the trolley locking means 16 forms a vertices of a quadrangle having the fixed wheel 11A and the lock member 18 as vertices on the traveling surface F, and the quadrangle of the base portion 12 is centered on the lifting column portion 14 in plan view. It is formed so as to draw a large area close to the occupied floor area, and these fixing points are configured to stably fix the work carriage 10 against a load in the rotation direction or any horizontal direction. In addition, it is desirable that such a fixing point should be formed in a polygonal shape that is as wide as possible or larger around the elevating column portion 14 and is as large as possible.

The elevating column 13 has a cylindrical fixed column 31 which is erected and fixed to the base 12, and a cylindrical movable column which is hung from the work table 14 and externally fitted on the fixed column 31 so as to be vertically movable. A support column 32, a gas spring 21 that is a linear drive mechanism that is disposed in the support columns 31 and 32 and biases the work table 14 in the upward direction, a restraint mechanism 22 that restrains the gas spring 21 shown in FIG. An anti-rotation mechanism 23 that restricts the rotation of the work table 14 around the axis and a steady rest mechanism 24 that prevents the work table 14 from shaking with respect to the base portion 12 are provided.
In the lifting column 13 of the book, the stability and smooth lifting of the work table 14 are ensured.

Further, the elevating operation means 15 is a fixing releasing lever 2 which is a fixing releasing member for releasing the restraint mechanism 22.
5 and a foot-operated lowering operation mechanism 26 capable of lowering the work table. Before each work, the worker operates the fixing release lever 25 to raise the work table 14 by the gas spring 21 and fix it. During operation of the release lever 25, the foot-operated lowering operation mechanism 26 can be operated to lower the work table 14 and stop the work table 14 at an arbitrary position.

In the foot-operated lowering operation mechanism 26, a fulcrum is supported by the base portion 12 so as to be rotatable in the vertical direction, and an operating portion 30 is provided at a position of about 1/2 of the length direction.
And a lowering operation lever 27 that presses down the work table 14 with a force of about 1/2, and an upper pedal 28 provided at the free end of the lowering operation lever 27.
And a lower pedal 29 provided on the lowering operation lever 27 below the upper pedal 28.

The details of the work carriage 10 will be described below. The base portion 12 has a predetermined angle (for example, 120
3), and three supporting beam members 34A, 34B, 34
B is extended, and a frame member 35 also serving as a bumper is attached to the front end portions of the support beam members 34A and 34B with the U-shape having rounded corners in plan view and the rear portion being opened. Fixed wheels 11A are attached to the left and right sides of the frame member 35 on the front side, and free wheels 11B are attached to the rear part of the frame member 35. The frame member 35 is set lower than the height of the shoes of the worker. Therefore, safety is taken into consideration so as not to hit the feet directly.

As shown in FIGS. 4 and 6, the trolley lock means 16 is configured to push the lock member 18 against the traveling surface F by the trolley lock lever 17 via the locking interlocking mechanism 19. That is, the trolley lock lever 17 having the foot-operated pedal portion 17a provided at the free end is connected and fixed to the horizontal support shaft 43 rotatably supported by the lower end plate 41 of the fixed support column 31 via the bracket 42. It is supported so as to be vertically rotatable. And interlocking mechanism for lock 1
9, a pair of left and right actuating arms 45 having cam rollers 44 on both ends of the fixed support column 31 has a carriage lock lever 1.
It is fixed to the support shaft 43 at a predetermined angle with respect to 7.
The locking interlocking mechanism 19 includes a support beam member 32B at the rear portion,
A mountain-shaped link arm 47, 47 is vertically rotatably supported at an intermediate portion of 32B via a horizontal pin 46, and a passive plate 48 with which the cam roller 44 abuts is attached to a passive end of the link arm 47 to operate. A cylindrical lock member 18 is attached to the end via a height-adjustable screw shaft 49. An urging spring 50 is attached to the horizontal pin 46 so as to urge the link arm 47 to rotate so that the passive end is in a lower position, and to bring the passive plate 48 into contact with the cam roller 42.

Therefore, the foot pedal 17a at the ascending limit
When the carriage lock lever 17 is rotated downward by pushing, the cam roller 44 pushes up the passive plate 48 via the support shaft 43, the link lever 46 is rotated, and the operating end is lowered, whereby the lock member 18 is moved. After being pressed against the traveling surface F, the rear portion of the base portion 12 is slightly lifted. Then, the rotation of the carriage lock lever 17 is restricted by the stopper 41a of the lower end plate 41, and the cam roller 42 is stopped at the operation limit position b where the cam roller 42 has rotated a predetermined angle beyond the top a of the rotation locus, and becomes the overlocked state. Here, when the cart lock means 16 is released, when the worker slightly kicks up the foot pedal 17a with his toes and the cam roller 42 crosses the top a, the biasing spring 50 causes the lock member 1 to move.
9 rises and the lock is released.

By the way, in this embodiment, the two lock members 18 are pressed against the traveling surface F, the rear portion of the base portion 12 is slightly floated, and cooperates with the fixed ring 11A arranged at the front portion of the base portion 12. And the work carriage 10 is fixed. The two fixed wheels 11A and the two lock members 18 are arranged near the four corners of the base portion 12, respectively, and form a wide quadrangle surrounding the elevating pillar portion 13 with each of them as an apex in plan view. Even if a load such as a clockwise or counterclockwise rotational force centering on 13 and a biasing force from the front, rear, left, and right directions is applied, the work carriage 10 is prevented from moving or rotating and is stably stopped on the traveling surface F. Can be made. Further, the unevenness of the traveling surface F can be absorbed by slightly floating the rear portion of the base portion 12.

Of course, here, one fixed ring 11A and 2
By one locking member 18 or two fixed wheels 11A
Even if a triangle is drawn in a plan view with and one lock member 19, substantially the same effect as described above can be obtained.

If only the movement of the work carriage 10 is restricted, one lock member may be pressed against the traveling surface F. As shown in FIG. 3, in the up-and-down support column 13, an auxiliary support column 51 is vertically erected and fixed to the axial center position in the fixed support column 31 via a support member at the lower end portion, and also in the movable support column 32. The gas spring 21 arranged in
The main body 21a is firmly fixed near the upper end of the movable support column 32 via a mounting member, and the output rod 21b is connected and fixed to the upper end of the auxiliary support column 51.

In the elevating column part 13 in which the fixed column 31 and the movable column 32 are fitted so as to be vertically movable, it is necessary to arrange the guide member at least in the vertical position as the steady rest mechanism 24. A ring-shaped guide shoe made of a material with low frictional resistance is used for these guide members, but this guide shoe is required to have a high machining accuracy for the guide surface. Then, when a transverse load is applied, there is a problem that the frictional resistance rapidly increases and it becomes difficult to move up and down. As another guide member,
There is one in which a plurality of guide rollers are brought into contact with a guide surface at a predetermined angle. In this type, although it is strong against the processing accuracy of the guide surface and the load in the lateral direction, the presence or absence of mounting space, component cost,
There is a problem that the processing cost increases.

Therefore, in the steady rest mechanism 24 of the assembly carriage 10, the guide shoe 51 is adopted in the upper part and the guide roller device 52 is adopted in the lower part. Of course, a guide roller device may be provided on the upper part and a guide shoe may be provided on the lower part, or the guide roller device may be adopted on the upper part and the lower part. Here, the upper guide shoe 51 is
Due to the processing accuracy, it is interposed between the fixed column 31 and the gas spring body 21a that is firmly fixed to the movable column.

Further, the rotation stopping mechanism 23 of the lifting support 13
Is an elevating rail (convex portion) 53 provided on the front surface of the fixed support column 31 along the elevating direction, and a groove portion (engaging portion) 54 provided on the movable support column 32 and slidably engaged with the elevating rail 53. The groove 54 is provided in the guide roller device 52.

The guide roller device 52 is shown in FIGS.
As shown in FIG. 5, guide rollers 57A and 57B are rotated through horizontal axes on brackets 56A and 56B attached to the left and right sides of the opening, respectively, with openings formed in the front and rear surfaces of the lower part of the movable support column 32. It is supported freely. These guide rollers 57A and 57B are hourglass-shaped along the outer peripheral surface of the fixed support column 31 and have a groove 57b at the center.
Are formed, and rolling surfaces 57a are formed on the left and right respectively. Further, the groove portion 57b of the front guide roller 57A is configured as a groove portion 54 slidably engaged with the elevating rail 53. Further, the rear guide roller 57B is provided with adjusting tools 58R and 58L on both sides of the horizontal shaft, which can be adjusted toward and away from the fixed support column 31 by a screw shaft.

Therefore, the rolling surfaces 57a of the rear guide roller 57B are brought into contact with the outer peripheral surface of the fixed column 31 by the adjusting tools 58R and 58L, and the front guide roller 57 is formed.
One or both of the rolling surfaces 57a of A contact the outer peripheral surface of the fixed support column 31 to move the movable support column 3 to the axial position of the fixed support column 31.
The two axes can be retained. Further, the guide roller device 52 and the guide shoe 51 enable stable vertical movement, and the work table 14 can be prevented from swinging in the horizontal direction or the circumferential direction. Furthermore, the guide roller 5
The work table 14 can be prevented from rotating by the groove 54 formed in 7A.

In the lifting operation means 15, a fixing release lever 25 for releasing the restraint mechanism 22 of the gas spring 21.
Is a main body 21 of the gas spring 21 as shown in FIG.
It is vertically rotatably attached to the upper end of
An operating portion 25a extending to the lower right side of the work table 14 through an opening formed in 2 and bent at the tip end in parallel with the side of the work table 14 is formed. Then, one hand is hung on the work table 14 and the operating portion 25a, and the operating portion 25a of the fixing release lever 25 that is biased downward is pulled upward, thereby operating the operating end downward and unlocking the gas spring 21. can do.

The biasing capacity of the gas spring 21 is set in consideration of the maximum weight of the product placed on the work table 14, but the restraint mechanism 22 continues to be locked even if a weight exceeding the biasing load is applied. It is configured to be.

For example, as shown in FIG. 10, the double-tube type gas spring 21 has a cylinder tube 8 inside an outer cylindrical body 81 forming a main body 21a via an annular chamber 82.
3 are decorated. The cylinder tube 83 is connected to the upper chamber 8 by a biston 84 to which the output rod 21b is connected.
6A and the lower chamber 86B, and the upper chamber 86A and the lower chamber 86B can be communicated with each other through the communication hole 82a communicated with the lower chamber 86B, the annular chamber 82, and the valve hole 85. Then, the operating rod 87 is urged upward by an urging member (not shown) so that the small-diameter valve 87a moves to the valve chamber 8 of the valve hole 85.
Located at 5a, the valve hole 85 is closed. When the actuating rod 87 is pushed down by the fixing release lever 25, the small diameter valve 87a moves downward to communicate the valve hole 85, and the piston 84 is driven downward due to the difference in pressure receiving area between the upper chamber 86A and the lower chamber 86B. Gas spring 2
1 is advanced.

In this locked state, if a load exceeding the capacity is applied, the upper chamber 86A is compressed and the work table 14 is slightly lowered, but it is composed of the upper guide shoe 51 and the lower guide roller device 52. Since the expansion / contraction of the elevating column 13 is guided by the steady rest mechanism 24, the work table 14 slightly descends in a stable state,
Subsequent work does not occur. Upper chamber 8
The air cushion by 6A can also reduce the impact at the time of mounting.

When the restraint mechanism 22 is released, a force obtained by subtracting the weight of the product being assembled from the urging force of the gas spring 21 is applied in the direction of raising the work table 14, so that the elevating column part 13 is slowly advanced and the work table is raised. 14 is raised. When lowering the work table 14, the foot-operated lowering operation mechanism 26 with the restraint mechanism 22 released.
The lever-type booster mechanism is used to lower with a small stepping force.

As shown in FIGS. 2, 4, 7, and 9, the foot-operated lowering operation mechanism 26 includes a lowering operation lever 27 which constitutes a booster mechanism which is rotatably supported in the vertical direction, and a lowering operation lever 27. Upper pedal 28 provided at the free end of the operating lever 27
Also, in order to prevent the position of the upper pedal 28 from becoming too high and making it difficult to depress, a lower pedal 29 provided below the upper pedal 28 is provided and is configured to depress in two steps and descend. .

That is, the lowering operation lever 27 is supported so that it can swing up and down through a horizontal support pin 65 on a support member 64 whose fulcrum is erected at the center of the reinforcing plate 34, and its free end side is raised and lowered. The front end portion is formed on the upper pedal 63 in the left-right direction. On the other hand, on the front bracket 56A of the movable support column 32, a pressure receiving roller 66 is rotatably supported around a horizontal axis through a support portion projecting forward, and the horizontal support pin 65 of the lowering operation lever 27 is connected to the upper pedal. About 1 / distance L up to 63
The pressure plate (actuator) 67 attached at the position 2 is in contact with the pressure receiving roller 66. Therefore, by pushing down the lowering operation lever 27, the movable support column 32 is pushed down by the pressure plate 67 via the pressure receiving roller 66, and the work table 14 can be lowered with a force of 1/2.

Further, as shown in FIG. 8, the lowering operation lever 2
The auxiliary operation lever 6 having the lower pedal 64 on the connecting member 68 integrally attached to the pressure plate 67 at the intermediate position of 7
2 is supported rotatably up and down via a horizontal pin 61, an upper limit position substantially parallel to the lowering operation lever 27, and a connecting member 68.
It is configured to be rotatable up and down between the lower limit regulated by the regulating portion provided in the. Further, a pair of left and right guide plates 6 attached to the front bracket 56A of the movable support column 32.
3, the lowering operation lever 27 and the auxiliary operation lever 6
2 lifts are guided.

As an option of the work carriage 10, for example, as shown in FIG. 11, a display plate 91 which is attached to the front of the work table 14 at an angle, for example, and a specification sheet, and a side of the work table 14 are attached and detached. There is a parts tray 92 that can be freely attached, a drawer 93 provided at the rear of the work table 14, a front auxiliary shelf 95 and left and right auxiliary shelves 96 that are installed via a removable auxiliary frame 94 on the frame member 35, and the like. Depending on the type, it is selected and installed. Further, a manual turntable 97 that can be positioned every 90 ° is installed on the work table 14.

In the above structure, for example, one worker places the product body on the work table 14 and the work carriage 1
By pressing 0, the first to fifth process parts are sequentially moved, stopped at a position near the shelf 2 in which the necessary parts are accommodated, and the necessary parts are taken out and assembled to the product body.

When the traveling carriage 10 is stopped at a predetermined position, the carriage lock lever 17 of the carriage lock means 16 is depressed to push the two lock members 18 to the traveling surface F via the interlocking mechanism 19 for locking. At the same time, the rear part of the base part 12 is slightly lifted to prevent movement, and the two lock members 18 and the two fixed wheels 11A at the front part of the base part 12 allow the load and rotational moment in the front-rear direction and the left-right direction. Even if the vehicle is damaged, the posture and position of the traveling carriage 11 can be stably maintained.

When it is desired to raise the height of the work table 14 in response to loading and unloading of products and parts and work from above, the fixing release lever 25 is pulled up to release the restraint mechanism 22 and the gas spring 21. Make progress. Then, by releasing the fixing release lever 25 at the desired height, the restraint mechanism 22 can be actuated and the work table 14 can be positionally fixed at an arbitrary position.

On the other hand, when it is desired to lower the work table 14 according to the working condition, the lower pedal 29 is first held down by the foot, and the fixing release lever 25 is pulled up by hand to release the restraint mechanism 22. The lower pedal 29 is depressed from the upper position (a) to rotate the lowering operation lever 27 downward, and the operating portion 30 pushes down the movable support column 32 via the pressure receiving roller 66 to contract the gas spring 21. At the middle position (a) where the lower pedal 29 comes into contact with the support beam 34B, the fixing release lever 25 is released to operate the restraint mechanism 22, and the foot is released from the lower pedal 29. Needless to say, the fixing release lever 25 may be released midway to stop the lowering of the work table 14.

When the work table 14 is further lowered, the upper release pedal 28 is pressed by the foot to release the fixing release lever 25.
The upper pedal 2 while releasing the restraint mechanism 22 by pulling up
8 is depressed to rotate the lowering operation lever 27 further downward to push down the movable support column 32 to contract the gas spring 21. At this time, the lower pedal 29 is rotated upward about the horizontal pin 61. At the lower position (C) of the upper pedal 28, the fixing release lever 25 is released to operate the restraint mechanism 22 and stop the work table 14 at the lower limit.

In this way, the work carriage 10 is installed on the production line 1
The work table 1 is moved to each of the process units A to E in sequence along with the work table 1 as needed each time the assembly work or the inspection work is stopped.
Adjust the height of 4 to the optimum height for the work and carry out the work.

According to the above embodiment, the work carriage 10 is provided.
Is a work position which is stopped while sequentially moving the respective process parts A to E along the production line 1, and the height of the work table 14 is adjusted by the elevating operation means 15 as necessary to easily achieve the optimum height. Therefore, it is possible to improve productivity and reduce worker fatigue.

Further, the fixing release lever 25 of the lifting / lowering operation means 15 releases the restraining means 22 to advance the gas sprinkle 21, and the restraining mechanism 22 is operated to raise the work table 14 and stop it at an arbitrary height. Can be made. Further, with the restraint means 22 released, the gas sprinkle 21 is contracted by the foot-operated descending operation mechanism 26 to operate the restraint mechanism 22, thereby operating the work table 1.
4 can be stopped at any height. Therefore,
The height of the work table 14 can be easily adjusted according to each work, the work efficiency can be improved, and the fatigue of the worker can be reduced.

Further, the detent mechanism 23 and the steady rest mechanism 2
4, the elevating column part 13 can be stably and smoothly expanded and contracted to vertically elevate and fix the work table 14, which contributes to improvement of workability.

Further, the booster lever mechanism constituted by the lowering operation lever 26 can contract the gas spring 21 with a small stepping force to lower the work table 14. Further, since the upper pedal 28 of the lowering operation lever 26 and the lower pedal attached to the lowering operation lever 26 can depress the pedals 28 and 29 in two steps, the swing stroke of the free end portion of the lowering operation lever 26. Can be easily stepped on, even if the
The stroke of the movable column 32 that is pushed down via the can be increased, and the workability can be improved.

Furthermore, since the rotation stopping mechanism 23 is constituted by the elevating rail 53 and the groove portion 57b of the front guide roller 57A, the rotation preventing mechanism 23 stops the rotation of the movable support column 32 while allowing it to move up and down. Even when the work table is added, the work table 14 can be effectively stopped. Further, a guide roller device 52 is provided below the movable support column 32, and a guide shoe 51 is provided above the guide roller device 52 at a predetermined interval between the upper end of the fixed support column 31 and the gas spring body 21a. Since the steady rest mechanism 24 is configured, the elevating column part 13 can be smoothly and stably expanded and contracted, and the work table 14 is stably supported even if a large weight is loaded or a load is applied in the horizontal direction. be able to.

Further, the work carriage 10 is constructed by arranging the work table 14 on the base portion 12 via one elevating support column portion 13, and the space around the elevating support column portion 13 below the work table 14 is a space portion. The projected area that interferes with obstacles during traveling can be reduced, and traveling can be performed smoothly. In addition, a drawer 93 for equipment, a component tray 92, auxiliary shelves 95, 96, etc. can be installed in the space around the elevating column portion 13, and the degree of freedom in selection is high. Moreover, unlike a wagon trolley, since there are no columns around it, it is possible to freely assume any posture such as bending the knees, etc., which facilitates the assembly work.

Further, the work platform 10 can be stopped easily and quickly by the foot-operated platform lock lever 17 of the platform lock means 16 to improve the workability. Further, by forming a quadrangle apex on the traveling surface F by the lock member 18 of the trolley locking means 16 and the fixed wheel 11A, the work trolley can be applied to the load and the rotation moment applied to the work trolley 10 in the front-rear direction and the left-right direction. 10 can be fixed stably, and workability can be improved.

In the above embodiment, the gas spring 21 is used as the linear drive mechanism. However, an air type single acting cylinder with an accumulator (accumulator), a hydraulic type single acting air cylinder with an accumulator, a manual winch mechanism using a wire or the like. By adopting a manual mechanism for performing only ascending drive by means of a manual rack and pinion mechanism and utilizing the product's own weight for descending, a simple and inexpensive lifting column 13 can be constructed.

Further, the work member which is moved up and down by the elevating column 13 is the work table 14 on which the product is placed, but the work member is not limited to this, and the work member supports, for example, the product in a suspended state. Or a working jig or a working jig for holding the product from the side.

[0069]

As described above, according to the cell producing method of the first aspect, the height of the working member can be easily adjusted at each working position by the elevating and lowering operation means. It is possible to perform work at a height position most suitable for the work, improve productivity, and reduce worker fatigue.

According to the cell production facility of the second aspect, since the work carriage can easily adjust the height of the work member at each work position by the lifting operation means, it is most suitable for the work in each process section. It is possible to perform work at an appropriate height position, improve productivity, and reduce operator fatigue. In addition, there are no obstacles around the elevating column, a free working posture can be secured, and fatigue does not occur.

According to the work vehicle for cell production of the third aspect, since the worker can easily adjust the height of the work table at each work position by the elevating operation means,
It is possible to perform the work at a height position most suitable for the work in each process section, improve productivity and reduce worker fatigue. Further, since the work cart composed of the base portion, the lifting support portion and the work table is used, the space between the base portion and the work table reduces the range of contact with the obstacle during traveling, and smooth traveling can be expected. Further, this space portion can be used as an installation space for auxiliary shelves and trays, and there are no obstacles around the elevating pillar portion, so that a free working posture can be secured and fatigue does not occur.

According to the work cart for cell production of the fourth aspect, the elevating column part can have a simple structure even if the elevating column part is provided with the linear drive mechanism for urging only upward. Also, by releasing the restraint mechanism with the fixing release member, the linear drive mechanism is advanced to raise the work table,
The worktable is fixed by operating the restraint mechanism at an arbitrary position. Further, while releasing the restraint mechanism by the fixing release member, the foot-operated lowering mechanism is operated to lower the work table. Thereby, the height of the work table can be adjusted to an arbitrary position with a simple operation.

According to the work cart for cell production of the fifth aspect, the rotation stopping mechanism can firmly hold the work table to support the rotation moment generated by the external force from the surroundings, and one of the upper and lower guide members can be supported from three directions. By configuring with the elevating guide roller that abuts, the work table can be smoothly lowered by the foot-operated lowering mechanism even when a horizontal load is applied, and stable work can be performed on the work table.

According to the sixth aspect of the present invention, there is provided a so-called booster mechanism for pushing down the movable strut with a large force by the actuating portion and depressing the lowering operation lever with the pedal at the free end. The work table can be lowered by force. At the free end of the lowering lever, which doubles the stroke, the upper pedal and the lower pedal are provided so that the upper pedal can be depressed next to the lower pedal to push down the lowering lever in two steps. It is possible to remarkably improve the operability of the descending operation lever that is configured.

According to the cell production work carriage of the seventh aspect, the work carriage can be stably stopped at a predetermined position by the carriage locking means, and the work on the work table can be performed accurately. .

According to the work trolley for cell production of claim 8, the lock member and the fixed wheel effectively support the external force applied to the work trolley from all directions, the reaction force generated at the time of assembly, and the rotation moment. The work carriage can be stably held at the stop position, and the workability can be further improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of a work carriage according to the present invention.

FIG. 2 is a right side view of the work cart.

FIG. 3 is a sectional view of the left side of the center of the work cart.

FIG. 4 is a plan sectional view of the work cart.

FIG. 5 is a partial side view showing a trolley lock means of the work trolley.

FIG. 6 is a cross-sectional plan view showing a trolley locking means of the work trolley.

FIG. 7 is a plan sectional view showing a guide roller device and a descending operation mechanism of the work carriage.

FIG. 8 is a right side view showing a guide roller device and a lowering operation mechanism of the work cart.

FIG. 9 is a left side view showing a guide roller device and a descending operation mechanism of the work cart.

FIG. 10 is a side sectional view illustrating a structure of a gas spring of the work cart.

FIG. 11 is a perspective view showing the same work trolley when an option is attached.

FIG. 12 is a schematic plan view showing a cell production facility using the work cart.

FIG. 13 is a schematic plan view showing another cell production facility using the work cart.

FIG. 14 is a schematic plan view showing still another cell production facility using the work cart.

[Explanation of symbols]

AE process section Aa-Ca body assembly area Da, Ea product evaluation area Fa packing area 1 production line 2 parts shelf 10 work trolleys 11A fixed wheel 11B freewheel 12 Base 13 Lifting column 14 Working table 15 Lifting operation means 16 truck lock means 17 Cart lock lever 18 Lock member 21 gas spring 22 Restraint mechanism 23 Detent mechanism 24 steady rest mechanism 25 Lock release lever 26 Foot-operated descending operation mechanism 27 Lowering operation lever 28 Upper pedal 29 Lower pedal 30 working part 31 fixed support 32 movable columns 35 Frame member 43 spindle 44 Cam roller 45 Working arm 47 Link Arm 48 Passive board 51 Guide shoe 52 Guide roller device 53 Lifting rail 54 Groove 57A, 57B Guide roller 57a Rolling part 57b groove 58A, 58B adjustment tool 62 Upper pedal 63 Lower pedal 66 Pressure receiving roller 67 Pressure plate 62 Auxiliary operation lever

Claims (8)

[Claims] 1. A base having a plurality of traveling wheels when a work trolley is moved along a production line that goes around each process unit and a product is produced by working on a plurality of process units on one work trolley. And a working member for performing work, and a work carriage provided with a retractable lifting column portion having a lifting operation means interposed between the base portion and the working member. A cell production method, wherein a worker operates a lifting operation means to adjust the height of a work member, and performs work in each process section. 2. A production line formed along a plurality of process sections, and a work carriage movable along the production line, wherein work is performed on a plurality of process sections on one work carriage. A cell production facility for producing a product, wherein the work trolley includes a base portion, a work member for performing work, and a telescopic lifting unit having a lifting operation unit interposed between the base unit and the working member. A cell production facility comprising a pillar. 3. A production line formed along a plurality of process sections, and a work carriage movable along the production line, for performing work on a plurality of process sections on one work carriage. A work trolley for cell production for producing a product, wherein the work trolley has a base portion having a plurality of traveling wheels,
It is provided with an elevating column part having a retractable elevating and lowering operation means and a work table, and the operator can operate the elevating and lowering operation means to adjust the height of the work table for each work of each process section. Work trolley for cell production. 4. An elevating column part includes a fixed column which is erected on a base part, a movable column which is fixed to a work table and slidably fitted to the fixed column, and is incorporated in both columns. The work table comprises a linear drive mechanism with a restraint mechanism that biases the work table in the upward direction and restrains the biasing force. The work trolley for cell production according to claim 3, wherein the table is configured with a foot-operated lowering mechanism capable of lowering. 5. An elevating strut section is provided with a detent mechanism comprising a convex strip provided on one of a fixed strut and a movable strut along the ascending / descending direction and an engaging concave section provided on the other and engaging with the convex strip. Provided, between the fixed strut and the movable strut, or between the fixed strut and the elevating member of the linear drive mechanism, an upper and lower guide member that guides the up and down movement at a predetermined interval is provided, and at least one of the upper and lower guide members, 5. The cell production work vehicle according to claim 4, wherein the cell production work trolley is constituted by an elevation guide roller that is in contact with the elevation axis at a predetermined angle from at least three sides. 6. A foot-operated lowering mechanism, wherein a fulcrum is vertically rotatably supported by a base portion, and a lowering operation lever which pushes down a movable column by an operating portion provided at a predetermined position on the free end side, 5. The work for cell production according to claim 4, wherein an upper pedal provided on a free end portion of the lowering operation lever and a lower pedal provided on the lowering operation lever below the upper pedal. Dolly. 7. A footrest type trolley lock lever presses at least one lock member against the traveling surface of the base portion,
7. A work carriage for cell production according to claim 3, further comprising a carriage lock means capable of fixing the work carriage. 8. A traveling wheel of a base portion is composed of a fixed wheel whose traveling direction is fixed and a free wheel whose traveling direction can be changed, and the stationary wheel and the lock member form a triangle on the traveling surface. 8. The work trolley for cell production according to claim 7, wherein the work trolley is constructed so as to form the polygonal vertices.