JP2544181B2 - Work trolley - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a work cart used for assembling and inspecting products such as copying machines.

<Prior Art and Its Deficiencies> For example, in an assembly line of a copying machine, a plurality of work carriages are moved along an endless movement path from an assembly start area to a product unloading area through a plurality of assembly areas and adjustment areas. .
In the assembly start area, the frame body of the copying machine (frame body on which various parts are not mounted) is placed on the carriage. Then, various components are mounted on the frame body while the carriage is conveyed through the assembly areas, and various parts mounted on the frame body while the carriage is conveyed through the adjustment areas. Various adjustments to When the trolley is moved to the product unloading area in this manner, substantially all the components are assembled to the frame body on the trolley, and adjustments to the various assembled parts are completed. In the product unloading area, the copier as an assembled product is unloaded from the cart and packed in a packaging box as required.

The trolley used in the above-described assembly line includes a trolley body that is moved along the assembly line, and a work table that is rotatably mounted on the trolley body, and an operation panel is arranged on the work table. ing. This operation panel is equipped with an electric outlet for supplying current to the copying machine (in a substantially completely assembled state) in the adjustment area, a voltage changeover switch for selecting the current voltage supplied to the electric outlet, and the like. There is.

However, the conventional work cart has the following problems to be solved due to the operation panel provided on the work table. That is, when the work table is rotated with respect to the main body of the bogie during the assembly work and the adjustment work of the copying machine, the operation panel provided on the working table moves to a position opposite to the operator, and the electric code of the copying machine is changed to It becomes difficult to electrically connect to the outlet or change the voltage switch.

<Purpose of the Invention> The present invention has been made in view of the above facts, and its main object is to provide an improved work cart having excellent workability.

<Outline of the Invention> According to the present invention, a carriage main body, a lift table mounted on the carriage main body so as to be movable up and down through a lift mechanism, a work table rotatably mounted on the lift base, and various types. There is provided an operation panel provided with the operation switch of 1., and a work cart having the operation panel provided on the lift table is provided.

In such a work cart, the operation panel is provided on a lift table that can be moved up and down. Therefore, even if the work table is rotated, the operation panel does not move. When it is moved up and down, it moves up and down together with it, thus significantly improving workability as compared with the conventional one.

<Specific Example> A specific example of the work carriage according to the present invention will be described below with reference to the accompanying drawings.

1 to 3, the work trolley 2 shown in the drawings includes a trolley body 4 having a rectangular shape. The trolley body 4 comprises a lower frame 6 composed of four relatively low side walls 8 (three side walls are shown in FIG. 3). A projecting wall 7 projecting forward (to the lower right in FIG. 3) is provided at the front end of the lower frame 6. In the specific example, further, caster mounting portions 9 (only one of which is shown in FIG. 3) projecting to both sides are provided on both sides of the lower frame 6, and the caster mounting portions 9 are spaced apart in the front-rear direction. Two casters 12 are installed. The four casters 12 arranged at the four corners of the carriage main body 6 are turnable swivel casters that are rotatable about an axis extending in the vertical direction, and have rotatable rollers 10.

Mainly referring to FIG. 1, the carriage main body 4 is guided by the guide means 14 and moved along the assembly line. In the specific example, the guide means 14 is composed of an inner guide member 16 and an outer guide member 18 which are arranged at intervals, and defines a guide groove 20 between the inner guide member 16 and the outer guide member 18. A drive chain 24, which is moved in the direction indicated by an arrow 22 by a drive source such as an electric motor, is arranged in the guide groove 20. On the other hand,
A pair of drive arms 26 and 28 are fixed to one side of the carriage main body 4 at intervals in the front-rear direction. Arm 26 and
28 extends toward the guide means 14, and pins 30 and 32 projecting downward are fixed to the tips of them. One pin 30 is movably received in the guide groove 20 of the guide means 14 and is releasably drivingly connected to the drive chain 24. The other pin 32 is movably received in the guide groove 20 without being drivingly connected to the drive chain 24. As configured, the drive chain 24 is
When the carriage main body 4 is moved in the direction indicated by, the carriage main body 4 is moved rightward as indicated by an arrow 34 via the pin 30 and the arm 26. At this time, since the pins 30 and 32 are received in the guide groove 20,
The trolley body 4 is reliably moved along the guide groove 20.

Mainly referring to FIG. 2 and FIG. 3, a rectangular lifting platform 38 is mounted on the carriage body 4 via a lifting mechanism 36 so as to be movable in the vertical direction. The lift mechanism 36 shown in the figure has a pair of outer arms 40 and a pair of outer arms 40 which are arranged at intervals in the lateral direction (direction perpendicular to the paper surface in FIG. 2, lower left to upper right direction in FIG. 3). It is provided with a pair of inner arms 42 (only one of which is shown in FIGS. 2 and 3). The axially central portions of the pair of outer arms 40 and the pair of inner arms 42 are pivotally connected via a shaft member 44. Such a pair of outer arms 40
The lower ends of the respective are rotatably connected to the front end of the bogie main body 4 (that is, the front end of the side wall 8) via pins 46, and their upper ends are mutually connected by an upper connecting shaft (not shown). The upper connecting shaft is connected to the rear part of the lifting table 38 so as to be rotatable and movable in the front-rear direction. Further, the upper ends of the pair of inner arms 42 are respectively connected to the lift table 38 via the pins 48.
Are rotatably connected to the front end of the trolley, and their lower ends are rotatably mounted on the rear portion of the carriage main body 4 (that is, the inner surface of the rear portion of the side wall 8) and movable in the front-rear direction. In the specific example, between the pair of outer arms 40 and the pair of inner arms 42, a hydraulic cylinder mechanism for vertically moving the lifting platform 38.
49 are intervening. A lower connecting plate 50 is fixed between the lower ends of the pair of outer arms 40.
A cylinder body 54 of the hydraulic cylinder mechanism 49 is pivotally connected to a bracket 52 provided in the cylinder via a pin.
Further, an intermediate connecting plate 56 is fixed to an intermediate portion of the pair of inner arms 42 (a portion slightly above the mounting portion of the shaft member 44), and a bracket (not shown) provided on the intermediate connecting plate 56 is fixed to the intermediate connecting plate 56. The output rod 57 of the hydraulic cylinder mechanism 49 is rotatably connected. The above-mentioned lift mechanism 36 may be a hydraulic table lift mechanism known per se (for example, commercially available from Nagoya Kiko Co., Ltd. under the trade name of scissor lift mechanism). With this configuration, when the hydraulic cylinder mechanism 49 is extended, the gap between the lower end portions of the pair of outer arms 40 and the upper end portions of the pair of inner arms 42 becomes larger (and thereby the upper ends of the pair of outer arms 40 are increased). Section and the lower ends of the pair of inner arms 42 are moved inward), and thus the lifting platform 38 is raised with respect to the carriage body 4. On the other hand, when the hydraulic cylinder mechanism 49 is contracted, the distance between the lower end portions of the pair of outer arms 40 and the upper end portions of the pair of inner arms 42 becomes smaller (thus, the pair of outer arms 40).
(The lower end of the above and the upper ends of the pair of inner arms 42 are moved to the outside), and thus the lifting platform 38 is lowered with respect to the carriage main body 4. As shown in FIG. 2, the elevating table 38 can be moved up and down between the lowest position shown by the solid line and the highest position shown by the chain double-dashed line, and can be positioned at any position between these positions. .

In the specific example, the following configuration is further made in relation to the lifting platform 38. That is, the lift mechanism 36 is mounted on the lower frame 6 of the carriage main body 4 and arranged between the caster mounting portions 9. The lift 38 is also arranged between the caster mounting portions 9. Therefore, even when the hydraulic cylinder mechanism 49 is contracted to lower the lifting table 38, the lifting table 38 does not come into contact with the caster mounting portion 9 and the lowermost position of the lifting table 38 is lowered (that is, the floor surface is lowered). Can be approached).

A work table 58 is arranged on the upper surface of the lifting platform 38. The work table 58 has a rectangular shape, is slightly larger than the lifting table 38, and is arranged eccentrically to the lower side in FIG. The work table 58 is attached to the lifting table 38 as shown in FIGS. 4 to 6. That is, a rectangular upper plate 60 is fixed to the upper surface of the lift table 38, and a support shaft 62 is fixed to the center of the upper plate 60 by means such as welding. The support shaft 62 extends substantially vertically upward from the upper plate 60, and its tip has a diameter slightly smaller than that of the other portions. On the other hand, a rectangular lower plate 64 is fixed to the lower surface of the work table 58, and a cylindrical member 70 and a support plate are fixed to the lower plate 64 by bolts 66 and 68.
72 is installed. The cylindrical member 70 is the bearing member.
It is rotatably supported by the small diameter portion of the support shaft 62 via 74. In the specific example, in order to smoothly perform the rotation of the work table 58 with respect to the lift table 38, a support roller 76 is provided between them.
Is intervening. Six L-shaped brackets 78 are fixed on the upper plate 60 of the lifting table 38 at intervals of substantially 60 degrees, and support rollers 76 are rotatably mounted on the upright portions of these brackets 78, respectively. . These supporting rollers 76 act on the lower surface of the lower plate 64 of the work table 58, and
Support 58 as required. Further, in the specific example, a positioning mechanism for positioning the work table 58 at a position rotated by 90 degrees is provided. The positioning mechanism shown is a roller 80
And a positioning member 82 that defines a recess for releasably receiving the roller 80. Top plate of elevator 38
A bracket 84 is attached to a predetermined portion of 60, an arm 86 is rotatably attached to the bracket 84, and a roller 80 is rotatably attached to a tip portion of the arm 86.
On the other hand, four brackets 88 are attached to the lower plate 64 of the work table 58 at equal intervals of substantially 90 degrees, and a positioning member 82 is fixed to each of the brackets 88. Therefore, when the roller 80 is received in one of the recesses of the four positioning members 82, the work table is
58 is positioned at a position rotated by 90 degree intervals (for example, the position shown in FIG. 4 as one position). A bias spring 90 that biases the roller 80 toward the positioning member 82 is preferably provided between the arm 86 and the bracket 88. On the upper surface of the work table 58 thus mounted, as shown in FIG. 5, for example, a frame body 91 of a copying machine is placed as required.

In the trolley 2 described above, the operation panel indicated by reference numeral 92 is provided on the lifting platform 38. In the specific example, an operation unit 94 (covered by a housing) is attached to the front end portion of the lift table 38 so as to project forward, and the operation unit 94 is attached.
An operation panel 92 is provided on the upper surface of the. The operation panel 92 includes an up switch 96, a stop switch 98, and a down switch 10.
0, a frequency-switching main switch 102, a voltage switching switch 104, and an electrical outlet 106 are provided. The raising switch 96 is for raising the lifting platform 38,
The stop switch 98 is for stopping the lifting of the lifting platform 38, and the lowering switch 100 is for lowering the lifting platform 38. The main switch 102 is an electric outlet 108 provided on the work table 58 (in the specific example, two electric outlets 108 are provided, one of which is 200 V).
The system current is supplied to the other side, and the other 100 V system current is supplied to the other side), and the supply of the current is stopped, and the frequency of the current supplied to these outlets 108 is switched. The main switch 102 stops the supply of current when in the neutral position, when the first operating position to supply the current of 60H _z, supplies a current of 50H _z When the second operating position. The voltage changeover switch 104 is for changing the voltage supplied to the electric outlet 108, and in the specific example, 6V of 100V, 110V, 120V, 200V, 220V and 240V.
You can select one from the types (100V, 1
The current of 10V and 120V is supplied to the one outlet 108, and the current of 200V, 220V and 240V is supplied to the other outlet 1
Supplied to 08). Further, the electric outlet 106 is a power outlet for jigs and the like used at the time of assembly work or adjustment work, and a current of, for example, 100 V is supplied by closing (ON) the main switch 102. still,
As shown in FIGS. 3 to 5, the outlet 108 is preferably provided on the side surface of the work table 58. With such a structure, the outlet 108 does not project beyond the upper surface of the work table 58, and this prevents the outlet 108 from protruding. Workability can be improved. An electrical cord (not shown) of a frame body 91 (similar to a copying machine completed by assembling various parts) on the work table 58 is electrically connected to the outlet 108 during adjustment work or the like. To be done.

In the specific example, a pair of terminal screws 107 are further provided on the front side surface (the lower right surface in FIG. 3) of the work table 58. To such a terminal screw 107, for example, one end of an electric cord of a copying machine on the work table 58 (one in which an electric connection terminal is not provided and an electric wire is exposed at one end of the cord) is electrically connected. Connected. As shown in FIG. 3, the terminal screw 107 is preferably arranged in a recess formed in a part of the work table 58 so that the tip of the terminal screw 107 does not protrude from the front side surface.

The above-described assembly line is further provided with the following power supply mechanism. The power feeding mechanism shown in the figure is a power feeding means 110 extending along the guide means 14 and a current collecting means 1 provided on the carriage main body 4.
It consists of 12. The power feeding means 110 includes a power feeding rail 114 extending along the assembly line inside the guiding means 14, and the power feeding rail 114 is provided with four terminal rails (not shown) at intervals in the vertical direction. There is. Voltage to two terminals rail, for example a frequency 60H _z of upper 200V
The current of the supply, the two, for example the frequency to the terminal rail of the lower voltage 50H _z current of 200V is supplied. The power supply rail 114 is covered with a cover member 116 having a U-shaped cross section on the other surface except the lower surface in FIG. Further, the current collecting means 112 is a main arm 118 attached to the carriage main body 4.
It has. The main arm 118 is pivotable between the first arm 120 connected to the carriage main body 4 and the first arm 120 in the front-rear direction so as to be pivotable between the working position (the position shown in FIG. 1) and the storage position. The second arm 122 is connected to the second arm 122, and a current collecting terminal 126 is attached to the tip of the second arm 122 via a current collecting arm 124. The current collecting arm 124 and the current collecting terminal 126 are arranged in four sets at intervals in the vertical direction corresponding to the terminal rails of the power feeding rail 114.
126 is electrically connected to the corresponding terminal rail. Therefore, when the power feeding means 110 and the current collecting means 112 are electrically connected, the current from the power feeding rail 114 is passed through the current collecting terminal 126 and the electric cord (partly shown in FIG. 1) connected to these. It is delivered to the connection terminal 128. The other connection terminal 130, which is releasably connected to the connection terminal 128, is for supplying a current to the operation unit 94 and the like provided on the lift 38, and both connection terminals 128 and 130 are electrically connected as shown in the drawing. When electrically connected, the current from the power supply rail 114 is sent to the operation unit 94 and the like. In the illustrated specific example, the connection terminals 128 and 130 are interposed between the current collecting terminal 126 and the operation unit 94, but when it is not necessary to supply power by removing the carriage 2 from the assembly line, the connection terminals 128 and 130 are provided. Can be omitted. When the carriage 2 is removed from the assembly line, the connection terminal 130 is disconnected from the connection terminal 128 and electrically connected to a connection terminal (not shown) outside the assembly line, and a current is supplied to the carriage 2 from outside the assembly line. It At this time, the connection terminal 128 is not electrically connected, and therefore, the current from the trolley body 4 side does not flow to the current collecting terminal 126, and the safety in terms of work is secured. The above-described power feeding mechanism is substantially the same as that disclosed in the specification and drawings of the patent application (name: power feeding mechanism in the assembly line) filed by the applicant on July 12, 1988, and therefore, For details, refer to the above specification and drawings.

Further, the power feeding means 132 shown in FIG. 6 is arranged between the lifting table 38 and the work table 58. That is, the terminal mounting member 134 is mounted on the upper plate 60 of the lifting table 38, and the three power supply terminals 136 are mounted on the terminal mounting member 134 at intervals in the vertical direction. . An annular insulating member 140 is attached to the peripheral portion of the support plate 72 attached to the work table 58 by a mounting screw 138, and the annular surface of the insulating member 140 is provided with three annular members at intervals in the vertical direction. A collector rail 142 is provided. Each power supply terminal 136 is electrically connected to the corresponding current collecting rail 142. In a specific example, for example, 200V system (200,220
And 240 V) current is supplied by using the highest and middle power supply terminals 136, and 100 V system (100, 110 and 120 V) current is supplied by using the middle and lowest power supply terminals 136. There is. The current supplied from the power supply terminal 136 is selected by operating the voltage changeover switch 104 (FIG. 3) provided on the operation panel 92, and the current flowing through the power supply terminal 136 and the power collection rail 142 is It is delivered to an electrical outlet 108 provided on the table 58. This power supply means 1
The basic structure of 32 is substantially the same as that disclosed in Japanese Patent Laid-Open No. 60-7981. Therefore, for the details, refer to the above-mentioned publication.

 The effects of the trolley 2 described above are as follows.

Mainly referring to FIG. 2 and FIG. 3, a work table
To raise 58, push up the raising switch 96. As a result, the hydraulic motor (not shown) is energized, the switching valve (not shown) is switched from the neutral position to the first operating position, and the pressure oil from the hydraulic motor is transferred to the cylinder side of the hydraulic cylinder mechanism 49. The pressure oil on the rod side (contraction side) is supplied to the (extension side) and returned to the oil reservoir (not shown), and thus the hydraulic cylinder mechanism 49 is extended. This extension causes the pair of inner arms 42 to pivot counterclockwise in FIG. 2 (which causes the pair of outer arms 40 to pivot clockwise in FIG. 2), thus causing the work table 58 to lift. By the action of the above, it is raised integrally with the lifting platform 38 as required.

To stop the lifting of the work table 58, the stop switch 98 may be pressed. As a result, the hydraulic motor (not shown) is deenergized and the supply of pressure oil is stopped. Also,
The switching valve (not shown) is set to the neutral position, the communication between the cylinder side and the rod side of the hydraulic cylinder mechanism 49 and the hydraulic motor and the oil sump is cut off, and thus the hydraulic cylinder mechanism 49 is held in the extended state and the work is performed. The table 58 is held in the raised position.

On the other hand, in order to lower the work table 58, the lowering switch 100 may be pressed. From the viewpoint of work safety, it is desirable that the work table 58 be lowered only when the lowering switch 100 is pressed, unlike when the work table 58 is raised. When the lowering switch 100 is pushed, the switching valve (not shown) is set to the second operating position, the cylinder side of the hydraulic cylinder mechanism 49 is communicated with the oil sump (not shown), and thus the hydraulic cylinder mechanism 49 is moved up and down. 38 and work table
It is contracted by its own weight such as 58. Upon contraction, the pair of inner arms 42 pivots clockwise in FIG. 2 (which causes the pair of outer arms 40 to pivot counterclockwise in FIG. 2), thus causing the work table 58 to lift. By the action of the above, it is lowered integrally with the lifting platform 38 as required. In order to stop the lowering of the work table 58, the depression of the lowering switch 100 may be released, and when the depression is released, the switching valve (not shown) is positioned at the neutral position.

The following points are noted in the dolly 2 described above. That is, the operation panel 29, on which the various operation switches 96, 98, 100, 102 and 104 (in addition to these, the electric outlet 106) are provided, is provided on the lifting table 38, and therefore the work table 58 is When it is moved up and down, the operation panel 92 is also moved up and down together with it. Therefore, in order to facilitate the work, the work table
When the 58 is raised, the operation panel 92 also rises, and thus various switches 96 and the like of the operation panel 92 can be easily operated during work. Further, since the operation panel 92 is provided on the lift table 38, the work table 58 is moved to the arrow 144 or 1 in the assembly work or the like.
Even if the work table 58 is rotated in the direction indicated by 46, the work table 58 is only rotated relative to the lifting table 38 and the operation panel 92, and thus the operability of the various switches 96 and the like is not deteriorated.

In the specific example, as shown in FIGS. 1 and 4, the work table 58 is located below the trolley body 4 (in other words, the lift table 38) in FIGS. 1 and 4, that is, outside the assembly line. It is arranged with some eccentricity toward it. As will be understood from FIG. 1, the operator assembles the frame body 91 (FIG. 5) of the trolley 2 on the lower side in FIG. Therefore, by disposing the work table 58 in this manner, workability can be further improved.

Although a specific example of the work cart according to the present invention has been described above, the present invention is not limited to this specific example, and various modifications and corrections can be made without departing from the scope of the present invention.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of an assembly line to which a specific example of a truck according to the present invention is applied. FIG. 2 is a side view showing a specific example of a truck according to the present invention. FIG. 3 is a perspective view of the truck shown in FIG. FIG. 4 is a plan view showing a work table and a lifting table in the truck of FIG. FIG. 5 is a side view of the work table and the lifting table shown in FIG. FIG. 6 is a side sectional view showing a connecting portion between the work table and the lifting table of FIG. 2 …… Bogie 4 …… Bogie main body 14 …… Guidance means 36 …… Lift mechanism 38 …… Lift platform 49 …… Hydraulic cylinder mechanism 58 …… Work table 92 …… Operation panel 94 …… Operation unit 110 …… Power supply means 112 …… Current collecting means 132 …… Power feeding means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location B66F 9/24 7515-3F B66F 9/24 T 11/04 11/04 (72) Inventor Takeji Tanaka 1-22 Tamatsukuri, Higashi-ku, Osaka-shi, Osaka Prefecture Mita Kogyo Co., Ltd. (72) Inventor Koita Former 1-2-2 Tamatsukuri, Higashi-ku, Osaka-shi Osaka-shi Mita Kogyo Co., Ltd.

Claims (1)

(57) [Claims] 1. A trolley body, a pedestal movably mounted on the trolley body via a lift mechanism, a work table rotatably mounted on the pedestal, and various operation switches. Trolley provided with the operation panel, and the operation panel provided on the lifting table.