JPH0834598A - Movable and elevatable working carriage - Google Patents

Abstract

PURPOSE:To facilitate the movement and direction turn of a working carriage and the elevation of the same by providing the working carriage incorporating a manipulator pedestal at the upper end of an expandable means on a base frame, and by manipulating a clutch for engaging and disengaging front wheels adapted to be integrally rotated with left and right axles, with and from a right drive shaft which is rotatable, relative to a left drive shaft. CONSTITUTION:When an expanding and shrinking handel is manipulated, an expanding means 6 is extended and retracted, and accordingly, a working bed 8 is raised and lowered from and to a base frame 24. When a clutch is manipulated, left and right drive shafts are driven and coupled together, and then, and the rotating drive force of the left and right drive shafts are transmitted to both axles through the intermediary of left and right running control handles 96, 98, and accordingly. Left and right wheels 24, 28 are simultaneously rotated so that the working carriage 2 is moved forward or rearward. When a clutch means 98 is manipulated, the left and right axles are disconnected from each other, and when the left or right running control handle 96, 98 is rotated, the working carriage 2 is turned rightward or leftward about left or right front wheel 28, 24. An operator can elevate, move forward or rearward and turn the working bed 8 while he rides on the working carriage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable / lifting work trolley, and more specifically, it is used for indoor / outdoor work such as fruit cultivation work in orchards, high-place work at construction sites, building maintenance work, and interior work for buildings. The present invention relates to a movable / liftable work truck applied when performing work at a place.

[0002]

2. Description of the Related Art Generally, for example, in interior work of buildings, ladders and stepladders are mainly used as scaffolds for work. However, depending on the working height, the worker has to raise and lower them one by one, and in order to change the working position, the worker has to descend from them, carry them and move them. Therefore, the work is inefficient and there is a problem in safety. In order to solve this problem, a work cart that can be moved by electric power has been put into practical use.

[0003]

In the above-mentioned work carriage, the movement and conversion of the movement direction of the work carriage are electrically driven, and therefore require a battery or a motor, which is relatively expensive and requires maintenance of the battery. Since it exists, its maintenance is troublesome.

An object of the present invention is to provide an improved moving / lifting type in which the work carriage can be easily moved, the direction of movement can be changed, and the workbench can be moved up and down easily by human power, and can be manufactured at a relatively low cost. It is to provide a work trolley.

[0005]

According to the present invention, a base frame, a telescopic means mounted on the base frame and capable of vertically expanding and contracting, and a workbench mounted on the upper end of the telescopic means, An operation table provided upright at the front end of the work table, an expansion / contraction driving means for expanding / contracting the expansion / contraction means, and an expansion / contraction manual operation means provided on the operation table for operating the expansion / contraction driving means. A traveling wheel means mounted on the base frame and a traveling drive means for driving the traveling wheel means, and the expansion / contraction means has a lower end rotatably supported on the base frame by the first shaft means. A first frame body whose upper end is movably connected to the work table in the front-rear direction, and is rotatably connected by the second shaft means in a form intersecting the first frame body, and the lower end is Moved to the base frame in the front-back direction A second frame body that is freely supported and has an upper end portion rotatably connected to the work table by a third shaft means, and the traveling wheel means is rotatably supported on a front left side portion of the base frame. A left front wheel mounted on the left axle so as to rotate integrally therewith, and a right front wheel mounted on the right axle rotatably supported on the right side of the front end of the base frame so as to rotate integrally therewith. The traveling drive means is rotatably supported on the operation console, and the left drive shaft is rotatably supported on the operation console and is arranged on an axis common to the left drive shaft. A right drive shaft which is rotatable relative to the left drive shaft, a clutch means for drivingly connecting or disconnecting the left drive shaft and the right drive shaft, and a clutch provided on the operation console for operating the clutch means. The operation lever means and the operation console And a left traveling operation handle for rotationally driving the left drive shaft, a right traveling operation handle provided on the operation console for rotationally driving the right drive shaft, and a rotational drive force for the left drive shaft. And a left driving force transmitting means for transmitting the rotation driving force of the right driving shaft to the right wheel, and a moving / elevating type. A work trolley is provided.

[0006]

When the workbench is raised and lowered, the operator can operate the telescopic drive means by operating the telescopic manual operation means, and the telescopic means is extended and contracted. This raises the platform from the base frame to the desired height and lowers from that level. When the work carriage is moved forward or backward, the clutch operating lever means operates the clutch means to drive-couple the left drive shaft and the right drive shaft. When the left traveling operation handle and / or the right traveling operation handle are rotated, the left drive shaft and the right drive shaft are rotationally driven integrally. The rotational drive force of the left drive shaft is transmitted to the left axle via the left drive force transmission means, and the rotational drive force of the right drive shaft is transmitted to the right axle via the right drive force transmission means.
The left front wheel and the right front wheel are rotationally driven at the same time, so that the work carriage is moved forward or backward. When changing the traveling direction of the work carriage, the clutch drive lever means operates the clutch means to release the drive connection between the left drive shaft and the right drive shaft. When the left traveling operation handle is rotated, only the left drive shaft is rotationally driven. Since the rotational drive force of the left drive shaft is transmitted to the left axle via the left drive force transmission means, only the left front wheel is rotationally driven, and as a result, the work carriage is turned rightward about the right front wheel. Further, when the right traveling operation handle is rotated in a state where the drive connection between the left drive shaft and the right drive shaft is released, only the right drive shaft is rotationally driven. Since the rotational drive force of the right drive shaft is transmitted to the right axle via the right drive force transmission means, only the right front wheel is rotationally driven, and as a result, the work carriage is turned leftward about the left front wheel. The telescopic manual operation means, the clutch operation lever means, the left traveling operation handle and the right traveling operation handle are all provided on the operation platform which is provided upright at the front end portion of the work platform. It is possible to easily manually move the work platform up and down, move the work platform forward and backward, and change the direction while riding on the platform.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A movable / lifting work carriage constructed according to the present invention will be described in detail below with reference to the accompanying drawings. With reference to FIGS. 1 to 4, a movable / lifting work trolley generally designated by reference numeral 2 is a base frame 4
A telescopic means 6 mounted on the base frame 4 and capable of expanding and contracting in the vertical direction; a workbench 8 mounted on the upper end of the telescopic means 6; and an operation table provided upright on the front end of the workbench 8. 1
0, and an expansion and contraction drive means for expanding and contracting the expansion and contraction means 6,
A telescopic operation handle (which constitutes a telescopic manual operating means) 12 for operating the telescopic drive means, traveling wheel means mounted on the base frame 4, and traveling drive means for driving the traveling wheel means are included. There is. In the movable / elevating work carriage 2, the front is the left of FIG. 1 (forward direction), the rear is the right of FIG. 1 (reverse direction), the left is the right of FIG. 2, and the right is the left of FIG. Shall mean.

The base frame 4 has a substantially rectangular shape as a whole and two side frames 1 extending in the front-rear direction.
4 and an end frame 16 that connects the front and rear ends of each side frame 14 (only the end frame 16 that connects the front ends is shown in the figure). Left and right sides of the upper surface of the base frame 4, that is, each side frame 14
A lower guide rail 18 is provided on the upper surface on the rear side so as to linearly extend along the lower guide rails 18. Each lower guide rail 18 has a substantially channel shape, and its open sides are positioned so as to face each other (see FIG. 3).
A bracket 20 is provided on the lower surface on the left side of the front end of the base frame 4.
The left axle 22 is rotatably supported on the bracket 20, and the left front wheel 24 is attached to one end of the left axle 22 so as to rotate integrally therewith. A bracket 20 is provided on the lower surface of the right side of the front end of the base frame 4,
A right axle 26 is rotatably supported on the bracket 20, and a right front wheel 28 is attached to one end of the right axle 26 so as to rotate integrally therewith. Flexible casters 32 are provided on both lower surfaces of the rear end of the base frame 4 (only the flexible caster 32 on the left side is shown in the figure). The front left wheel 24, the front right wheel 28, and each of the universal casters 32 constitute traveling wheel means.

The expansion / contraction means 6 includes a first frame body 34 having a lower end rotatably supported by the base frame 4 by the first shaft means and an upper end movably connected to the workbench 8 in the front-rear direction. The one frame member 34 is rotatably connected by the second shaft means in a form intersecting with the X shape, the lower end portion is supported by the base frame 4 so as to be movable in the front-rear direction, and the upper end portion is attached to the workbench 8 by the third portion. The second frame body 36 is rotatably connected by the shaft means. The first frame body 34 includes a pair of first side frames 38 that extend in parallel at a distance, two first horizontal frames 40 that connect the first side frames 38, and a first side frame 38.
Upper guide rollers 42 provided on the respective upper ends of the first side frames 38, and expandable driven horizontal frame means 44 (see FIG. 4) for connecting the upper ends of the first side frames 38 to each other. Each first horizontal frame 40 is formed of a pipe member, and both ends of each pipe member are fixed to the inner surface of the corresponding first side frame 38. Second frame body 36
Are provided at a lower end portion of each of the pair of second side frames 46 extending in parallel at a distance, two second horizontal frames 48 connecting the second side frames 46, and the second side frames 46. And a lower guide roller 50. Each second horizontal frame 48 is formed of a pipe member, and both ends of each pipe member are fixed to the inner surface of the corresponding second side frame 46.

Seconds corresponding to the respective first side frames 38
The side frame 46 is rotatably connected at a substantially central portion in the longitudinal direction thereof by a horizontal shaft 52 that constitutes second shaft means. Each second side frame 46 is positioned inside each first side frame 38,
It is rotatably connected to cross the X-shape. More specifically, the horizontal shaft 52 is fixed to a substantially middle portion in the longitudinal direction of each second side frame 46. Both ends of the horizontal shaft 52 project outward from the corresponding first side frame 38, and the second side frames 46 corresponding to the respective projecting parts are rotatably connected. Channel-shaped brackets 54 are provided on the front ends of the side frames 14 of the base frame 4, and the lower ends of the first side frames 38 are rotatably supported by corresponding brackets 54 by shafts 56 ( (See FIGS. 1, 11 and 14).
The shafts 56 are arranged so as to have a common axis and constitute the first shaft means. Second side frame 46
The lower guide rollers 50 provided at the lower ends of the
Each of them is movably engaged with a corresponding lower guide rail 18 provided on the base frame 4.

Upper guide rails 58 are provided on the lower surfaces of the left and right sides of the workbench 8 on the rear side so as to extend linearly in the front-rear direction. Each upper guide rail 58 has a substantially channel shape, and is positioned so that the open sides thereof face each other (see FIG. 9). Each upper guide roller 42 provided on the upper end of each first side frame 38 is movably engaged with a corresponding upper guide rail 58 provided on the workbench 8. Work table 8
Channel-shaped brackets 60 are provided on the lower surfaces of the left and right sides at the front end of the second side frame 4 respectively.
The upper end of 6 is attached to the corresponding bracket 60 by a shaft 62.
It is rotatably supported by (see FIG. 9). Each axis 6
2 are arranged so as to have a common axis and said third
It constitutes the shaft means.

A telescopic driven lateral frame means 44 (see FIG. 4) for connecting the upper end portions of the first side frames 38 to each other.
Includes a pair of vertical frames 64 arranged to horizontally extend forward from the respective upper ends of the first side frames 38, and a horizontal frame 66 connecting the front ends of the vertical frames 64. A guide roller 68 is provided near the front end of each vertical frame 64. A screw hole extending in the front-rear direction is formed at the center of the horizontal frame 66 in the longitudinal direction. Each guide roller 68, together with the upper guide roller 42, is movably engaged with a corresponding upper guide rail 58 provided on the workbench 8 (FIG. 13).
reference). A screw member 70 extending in the front-rear direction is arranged at the center of the lower surface of the work table 8 in the left-right direction. Screw member 70
Both ends of the shaft form shafts without screws, and the shafts are rotatably supported so as not to move in the axial direction by bearing members (not shown) provided on the lower surface of the workbench. The thread portion of the screw member 70 is engaged with the thread portion of the lateral frame 66 of the telescopic driven lateral frame means 44.
With reference to FIGS. 4, 9 and 12, a telescopic drive shaft 72 is rotatably supported on the upper portion of the operation console 10.
A drive sprocket 74 is attached to one end of the unit 2 so as to rotate integrally therewith, and a telescopic operation handle 12 (constituting a telescopic manual operating means) is attached to the other end thereof so as to rotate integrally therewith. A shaft 76 is rotatably supported at an intermediate portion in the vertical direction of the operation console 10, and a pair of intermediate sprockets 78 and 80 are mounted on the shaft 76 so as to rotate integrally with the shaft 76. A driven sprocket 82 is attached to the front end of the screw member 70 so as to rotate integrally therewith. The drive sprocket 74 and the intermediate sprocket 78 are connected by a chain 84, and the intermediate sprocket 80 and the driven sprocket 82 are connected by a chain 86. The screw member 70, the extension / contraction drive shaft 72, the drive sprocket 74, the intermediate sprockets 78 and 80, the driven sprocket 82, the chains 84 and 86, etc. constitute extension / contraction drive means.

1 and 2 show a state in which the expansion / contraction means 6 is expanded, and the workbench 8 is raised to the highest position.
When the telescopic operation handle 12 is rotated to one side in this state, the screw member 70 is rotated to one side, so that the telescopic driven lateral frame means 44 is moved to the right in FIG.
Each guide roller 68 of the telescopic driven lateral frame means 44
(See FIGS. 4 and 13) and each first side frame 38.
Upper guide rail 58 to which the upper guide roller 42 corresponds
1 (see FIGS. 9 and 13) along the right side of FIG. At the same time, the lower guide rollers 50 of each second side frame 46 are moved rightward in FIG. 1 along the corresponding lower guide rails 18. The first side frames 38 and the second side frames 46 relatively rotate about the horizontal axis 52. As a result, the expansion / contraction means 6 contracts, and the workbench 8 is lowered to the lowest position (not shown). When the telescopic operation handle 12 is rotated to the other side while the workbench 8 is at the lowest position, the screw member 70 is rotated to the other side, so the telescopic driven lateral frame means 44 is moved to the left in FIG. The operation opposite to the above is performed, and the workbench 8 is raised. The operation of raising and lowering the workbench 8 can be easily performed only by rotating the telescopic operation handle 12 while the operator remains on the workbench 8. The height of the workbench 8 can be held at an arbitrary height position including a predetermined minimum position and a maximum position. Since the screw member 70 of the workbench 8 is screwed to the telescopic driven horizontal frame means 44 of the telescopic unit 6, even if a load is applied to the workbench 8, the screw member 70 is not rotated. Therefore, unless the telescopic operation handle 12 is rotated, the workbench 8 is reliably prevented from being lowered, and safety is ensured.

Handrails 88 are provided on both left and right sides of the workbench 8.
Is provided, and the front end of each handrail 88 is provided with the operation console 10 respectively.
Handrails 89 are connected to both sides of the. The handrails 88 and 89 protect the safety of the worker on the workbench 8, and the handrails 88 further contribute to the flight of the worker. A step 91 is provided on the lower rear surface of the workbench 8 for the operator to get on and off the flight. Although not shown, an appropriate frame is provided around the work table 8, and an appropriate cross frame is also provided in a portion surrounded by the frames. A floor member is provided on the upper surface of those frames. In the illustrated embodiment, each upper guide rail 58 constitutes a part of the frame.

In FIGS. 1, 2 and 5, the traveling drive means is a left drive shaft 90 rotatably supported on the operation console 10.
And a right drive shaft 92, which is rotatably supported by the operation console 10 and arranged on the common axis with the left drive shaft 90, and is rotatable relative to the left drive shaft 90, a left drive shaft 90, and a right drive. Clutch means 94 for drivingly connecting or disconnecting the shaft 92, and clutch means 94 provided on the operation console 10
And a console 1 for operating a clutch operating lever for operating
0 for driving the left drive shaft 90 to rotate, and a right drive operation handle 98 for rotating the left drive shaft 92 to rotate and drive the right drive shaft 92.
A left driving force transmitting means for transmitting the rotational driving force of the left driving shaft 90 to the left front wheel 24, and a right driving force transmitting means for transmitting the rotational driving force of the right drive shaft 92 to the right front wheel 28. Contains.

5 to 8, the operation console 10 has side plates 100 and 102, and support brackets 104 and 106 between the side plates 100 and 102. The left drive shaft 90 includes a side plate 100 and a support bracket 104.
Are rotatably supported by bearings 107 and 108, respectively. The right drive shaft 92 is rotatably supported on the side plate 102 and the support bracket 106 by bearings 110 and 112, respectively. One end of the left drive shaft 90 is relatively rotatably connected to one end of the right drive shaft 92. The left traveling operation handle 96 is attached to the other end of the left drive shaft 90 protruding from the side plate 100. The right traveling operation handle 98 is attached to the other end of the right drive shaft 92 protruding from the side plate 102.

The clutch means 94 is movable in the axial direction at one end of the right drive shaft 92, and the engaging pin 114 mounted so that both ends thereof protrude outward in the radial direction near the one end of the left drive shaft 90. And a cylindrical boss 116 mounted so as not to rotate relative to each other, and a coil spring (constituting a spring means) 118 for axially urging the boss 116 toward the engagement pin 114. Coil spring 11
Reference numeral 8 is a form in which the right drive shaft 92 is fitted, and is arranged between the boss 116 and the support bracket 106. Note that in FIG. 5, reference numerals 120, 122 and 124 indicate spacers. The bosses 116 are formed so as to extend in the axial direction from the ends facing the engagement pins 114, and at least one pair (two pairs in the illustrated example) of notches that are detachably engageable with both ends of the engagement pins 114. 126 and an annular groove 128 formed in the outer peripheral portion. Splines are formed on the outer peripheral portion of one end of the right drive shaft 92 and the inner peripheral portion of the boss 116, and the spline of the boss 116 is engaged with the spline of the right drive shaft 92 so as to be axially movable.

The clutch operating lever means is rotatably provided on the operating console 10 and is arranged so as to be orthogonal to the axial direction of the boss 116, and the axis C of the rotating shaft 130 at one end of the rotating shaft 130. An operation pin 132 provided at an eccentric position and having a tip end engaged with the annular groove 128 of the boss 116; and a clutch operation lever 134 formed so as to extend substantially L-shaped from the other end of the rotary shaft 130. I have it. The clutch operating lever 134 is arranged so as to project to the rear of the rear plate 136 of the operating console 10. The clutch operating lever 134 is restricted from rotating in one direction (clockwise in FIG. 8) by a first stop pin 138 (constituting a first stopper means) provided so as to project rearward of the rear plate 136. Rotation to the other side (counterclockwise in FIG. 8) is restricted by the first position A and the second stop pin 140 (which constitutes the second stopper means) provided so as to project rearward of the rear plate 136. And the second position B is set to be selectively positioned.

The clutch operating lever 134 is in the first position A
The pair of notches 12 in the boss 116 when positioned at
6 is engaged with both ends of the engagement pin 114, the left drive shaft 90 and the right drive shaft 92 are drivingly coupled, and the coil spring 11 is provided.
The position of the operation pin 132 with respect to the axis C of the rotating shaft 130 is defined so that the urging force P of 8 rotates the clutch operating lever 134 in the clockwise direction in FIG. 8 via the boss 116, the operating pin 132, and the rotating shaft 130. There is. Further, when the operating lever 134 is positioned at the second position B, the pair of notches 126 of the boss 116 are disengaged from both ends of the engagement pin 114, and the left drive shaft 90 and the right drive shaft 92 are connected. Is released from the driving connection and the biasing force P of the coil spring 118 is released.
The operating pin 1 with respect to the axis C of the rotating shaft 130 is rotated so that the clutch operating lever 134 rotates counterclockwise in FIG. 8 via the boss 116, the operating pin 132, and the rotating shaft 130.
32 positions are defined. As shown in FIG. 8, when the clutch operating lever 134 is positioned at the first position A, its axis L1 coincides with the axes of the boss 116 and the coil spring 118 that cross the axis C of the rotating shaft 130, and the operating pin The axis Cp of 132 is positioned above the axis L1. Further, when the clutch operating lever 134 is positioned at the second position B on the opposite side of 180 °, its axis L2 (which is an extension of the axis L1) crosses the axis C of the rotary shaft 130 and the coil spring 118. Coincides with the axis of
The axis Cp of the operation pin 132 is positioned below the axis L1. With such an over-center mechanism, the clutch operating lever 134 is moved to the first position A by the biasing force P of the coil spring 118 without providing a special lock mechanism.
Alternatively, the clutch means 94 can be held in the second position B, that is, in the drive-engaged state or the drive-disengaged state.

Move the clutch operating lever 134 to the first position A
When the clutch means 94 is placed in the driving connection state and the left driving shaft 90 and the right driving shaft 92 are drivingly connected, it is only necessary to rotate one of the left traveling operation handle 96 and the right traveling operation handle 98. The left drive shaft 90 and the right drive shaft 92 can be rotated simultaneously. Further, by rotating the left traveling operation handle 96 and the right traveling operation handle 98 at the same time, the left drive shaft 90 and the right drive shaft 92 can be simultaneously rotated more easily.

Referring to FIG. 7, side plate 100 of operation console 10
A substantially rectangular clamp 142 is attached to the. A hole 144 is formed in the center of the clamp 142, and a slit 146 is formed between one side of the clamp 142 and the hole 144.
Are formed. There is also a slit 1 on the clamp 142.
A hole 148 penetrating through 46 is formed, and a female screw is formed in the hole 148 above the slit 146. Hole 14
A lock lever 150 is engaged with 8. A male screw (not shown) is formed at the tip of the lock lever 150,
This male screw is engaged with the female screw of the hole 148. The cylindrical portion 97 of the left traveling operation handle 96 is positioned in the hole 144 of the clamp 142 so as to be fitted therein. The lock lever 150 can be rotated by approximately 180 ° in this embodiment. When the lock lever 150 is in the unlocked position, the slit 146 keeps a predetermined distance, and the hole 144 of the clamp 142 restrains the rotation of the cylindrical portion 97 of the left traveling operation handle 96 positioned therein. Never. When the lock lever 150 is rotated approximately 180 ° from the unlocked position to the lock position, the gap between the slits 146 is reduced and the clamp 142 is moved.
The inner diameter of the hole 144 is reduced. Hole 1 in clamp 142
Reference numeral 44 tightens the cylindrical portion 97 of the left traveling operation handle 96 to firmly restrain its rotation. Clutch means 94
When the lock lever 150 is positioned at the lock position when the drive lever is in the drive coupling state, the left drive shaft 90 and the right drive shaft 92 are
And can be held in lock at the same time. If such a lock mechanism is provided on the side plate 102 side of the operation console 10 as well, a stronger lock function can be obtained. Further, when the clutch means 94 is brought into the drive disengaged state, the left drive shaft 90
And the right drive shaft 92 can be selectively held in the locked state.

Referring to FIGS. 9 to 14, the left driving force transmitting means is a left driving sprocket 160 mounted on the left driving shaft 90 so as to rotate integrally with the left driving shaft 90, and is rotatably provided on the workbench 8 and expands and contracts. A left first relay shaft 162 having a common axis with each shaft 62 of the means 6, a pair of left first relay sprockets 164 and 166 mounted on the left first relay shaft 162 so as to rotate integrally therewith; A pair of left second relay sprockets 168 and 170 mounted so as to be able to rotate integrally with each other with respect to the horizontal shaft 52, and an axis line that is rotatably provided on the base frame 4 and is common to each shaft 56 of the expansion / contraction means 6. A left third relay shaft 172, and a pair of left third relay sprockets 174 and 176 mounted to the left third relay shaft 172 so as to rotate integrally with each other.
A left driven sprocket 178 mounted on the left axle 22 so as to rotate integrally therewith, and a left driven sprocket 160
180 connecting the first left relay sprocket and one of the left first relay sprockets 164 and the other first left relay sprocket 1
A chain 182 connecting between 66 and one of the left second relay sprockets 168, a chain 184 connecting between the other 170 of the left second relay sprockets and one of the left third relay sprockets, and a left third A chain 186 connecting the other one of the relay sprockets 176 and the left driven sprocket 178 is provided. As shown in FIG. 9, a pair of left first relay sprockets 164 and 166.
Are attached to both ends of the left first relay shaft 162. As shown in FIG. 10, a pair of left second relay sprockets 16 are provided.
8 and 170 are fixed to the cylindrical member 53 rotatably supported by the horizontal shaft 52, and the pair of left third relay sprockets 174 and 176 are mounted on the cylindrical member 173 rotatably supported by the left third relay shaft 172. It is fixed.

The idler sprocket 1 is mounted on the operation console 10.
88 is provided and is engaged with the chain 180. An idler sprocket 190 is provided on the second horizontal frame 48 and is engaged with the chain 182. An idler sprocket 192 is provided on the first horizontal frame 40 and is engaged with the chain 184. Each idler sprocket 188, 190 and 192 is attached to each chain 1
The chains 82, 184 and 186 are supported so that their positions can be adjusted, and appropriate tensions are adjustably applied to the chains 182, 184 and 186. A mechanism for adjusting these tensions may be a well-known one, and therefore a description thereof will be omitted.

Since the left driving force transmitting means is constructed as described above, when the left traveling operation handle 96 is rotated,
The rotational driving force is applied to the left drive shaft 90, the left drive sprocket 160, the chain 180, one of the left first relay sprockets 164, the left first relay shaft 162, the other left first relay sprocket 166, the chain 182, and the second left relay. One of the relay sprockets 168, the other of the left second relay sprockets 17
0, chain 184, one of the left third relay sprockets 1
74, the other of the left third relay sprocket 176, the chain 186, the left driven sprocket 178, and the left axle 22 to be transmitted to the left front wheel 24. It should be noted that the pair of left first relay sprockets 164 and 166 are provided for each shaft 62 of the expansion / contraction means 6.
Is mounted on the left first relay shaft 162 having an axis line common to
The pair of left second relay sprockets 168 and 170 are mounted on the horizontal shaft 52 of the extension / contraction means 6, and the pair of left third relay sprockets 174 and 176 have the left third relay having the same axis as each shaft 56 of the extension / contraction means 6. Since it is attached to the shaft 172, the left driving force transmission means is not affected even if the expansion / contraction means 6 expands / contracts.

Referring to FIGS. 9, 15 and 16, the right driving force transmitting means having substantially the same structure as the left driving force transmitting means is mounted on the right driving shaft 92 so as to rotate integrally therewith. Right drive sprocket 194 and workbench 8
A right first relay shaft 196 that is rotatably mounted on the first relay shaft 196 and has a common axis with the shafts 62 of the expansion and contraction means 6;
A pair of right first relay sprockets 198 and 200 mounted on the 96 so as to rotate integrally therewith, and a pair of right second relay sprockets 202 mounted on the horizontal shaft 52 of the expansion / contraction means 6 so as to rotate integrally with each other. And 204,
A right third relay shaft 206 rotatably provided on the base frame 4 and having an axis common to each shaft 56 of the expansion and contraction means 6,
A pair of right third relay sprockets 208 and 210 mounted to the right third relay shaft 206 so as to rotate integrally therewith, and a right driven sprocket 212 mounted to the right axle 26 so as to rotate integrally therewith, A chain 214 connecting between the right drive sprocket 194 and one of the right first relay sprockets 198, the other one of the right first relay sprocket 200 and one of the right second relay sprocket 202.
A chain 216 for connecting between the right second relay sprocket 204 and the right third relay sprocket
08, the other of the right third relay sprocket 210 and the right driven sprocket 212.
And a chain 220 that connects between and. As shown in FIG. 9, a pair of right first relay sprocket 198.
And 200 are attached to both ends of the right first relay shaft 196. As shown in FIG. 15, the pair of right second relay sprockets 202 and 204 are fixed to the cylindrical member 55 rotatably supported by the horizontal shaft 52, and the pair of right third relay sprockets 208 and 210 are the right third relay sprockets. It is fixed to a cylindrical member 175 rotatably supported by the relay shaft 206.

The idler sprocket 2 is attached to the operation console 10.
22 is provided and is engaged with the chain 214. An idler sprocket 224 is provided on the second horizontal frame 48 and is engaged with the chain 216. An idler sprocket 226 is provided on the first horizontal frame 40 and is engaged with the chain 218. Each idler sprocket 222, 224 and 226 is attached to each chain 2
It is supported for position adjustment with respect to 14, 216 and 218, and an appropriate tension is adjustably applied to each chain 214, 216 and 218. A mechanism for adjusting these tensions may be a well-known one, and therefore a description thereof will be omitted.

Since the right driving force transmitting means is constructed as described above, when the right traveling operation handle 98 is rotated,
This rotational driving force is applied to the right drive shaft 92, the right drive sprocket 194, the chain 214, one of the right first relay sprockets 198, the right first relay shaft 196, the other right first relay sprocket 200, the chain 216, and the second right relay. One of the relay sprockets 202, the other of the right second relay sprockets 20
4, chain 218, one of the right third relay sprocket 2
08, the other of the right third relay sprocket 210, the chain 220, the right driven sprocket 212, and the right axle 26 to be transmitted to the right front wheel 28. It should be noted that the pair of right first relay sprockets 198 and 200 includes the shafts 62 of the expansion / contraction means 6.
Mounted on the right first relay shaft 196 having an axis line common with
The pair of right second relay sprockets 202 and 204 are mounted on the horizontal shaft 52 of the extension / contraction means 6, and the pair of right third relay sprockets 208 and 210 are the right third relay having the common axis with each shaft 56 of the extension / contraction means 6. Since it is attached to the shaft 206, the right driving force transmission means is not affected even if the expansion / contraction means 6 expands / contracts.

With reference to FIGS. 1 to 3, the operation of the movable / liftable work carriage 2 will be described. When raising and lowering the workbench 8, the operator operates the telescopic operation handle 12,
The telescopic drive means 6 can be activated and the telescopic means 6 is stretched and contracted. As a result, the workbench 8 rises from the base frame 4 to a desired height and descends from that height. When the work carriage 2 is moved forward or backward, the clutch drive lever 134 is operated to operate the clutch means 94 to drive-couple the left drive shaft 90 and the right drive shaft 92. Next, when the left traveling operation handle 96 and / or the right traveling operation handle 98 are rotated, the left drive shaft 90 and the right drive shaft 92 are integrally driven to rotate. Left drive shaft 90
The rotational drive force of the right drive shaft 92 is transmitted to the left axle 22 via the left drive force transmission means, and the rotational drive force of the right drive shaft 92 is transmitted to the right axle 26 via the right drive force transmission means. The right front wheel 28 is simultaneously driven to rotate, and as a result, the work carriage 2 is moved forward or backward. When changing the traveling direction of the work carriage 2, the left drive shaft 90 is operated by operating the clutch means 98 with the clutch operating lever 134.
The drive connection between the right drive shaft 92 and the right drive shaft 92 is released. Next, when the left traveling operation handle 96 is rotated, only the left drive shaft 90 is rotationally driven. The rotational drive force of the left drive shaft 90 is transmitted to the left axle 22 via the left drive force transmission means, so the left front wheel 2
Only 4 is rotationally driven, and as a result, the work carriage 2 is turned to the right around the right front wheel 28. The left drive shaft 90
When the right traveling operation handle 98 is rotated in a state where the drive connection between the right drive shaft 92 and the right drive shaft 92 is released, only the right drive shaft 92 is rotationally driven. The rotational drive force of the right drive shaft 92 is transmitted to the right axle 26 via the right drive force transmission means, so the right front wheel 2
Only 8 is driven to rotate, and as a result, the work carriage 2 is swung to the left around the left front wheel 24. The telescopic operation handle 12, the clutch operation lever 134, the left traveling operation handle 96, and the right traveling operation handle 98 are all on the workbench 8.
Since it is concentratedly provided on the operation platform 10 which is provided upright at the front end portion (the center portion in the left-right direction) of the operator, the worker can move up and down the work platform 8 while riding on the work platform 8 and the work platform 2 The forward movement, reverse movement, and turning can be easily performed manually.

By operating the clutch means 94 with the clutch operating lever 134, when the lock lever 150 is positioned at the lock position while the left drive shaft 90 and the right drive shaft 92 are drivingly coupled, the left traveling operation handle 96 is provided. The rotations of the right and left traveling operation handles 98 are firmly blocked, and the movement of the work carriage 2 is reliably blocked. Therefore, when the work carriage 2 is positioned at a predetermined work position and a predetermined work is performed, the work carriage 2 is reliably held at the predetermined position, so that work safety is ensured.

Next, referring to FIGS. 17 to 19, another embodiment of the movable / lifting work carriage constructed according to the present invention will be described. The main configuration in which the movable / lifting work trolley indicated by reference numeral 300 is different from the work trolley 2 is:
The point is that hydraulic pressure is used as the expansion / contraction drive means. That is, in the work carriage 300, the telescopic operation handle 12 and the drive sprocket 74 provided on the telescopic drive shaft 72, which are provided in the work truck 2, the intermediate sprockets 78 and 80 provided on the shaft 76, the screw member 70, the screw Driven sprocket 82 and chain 8 provided on the member 70
4 and 86, the telescopic driven lateral frame means 44, etc. are not provided. The other parts of the configuration are substantially the same as those of the work carriage 2 except for the parts described later, and therefore, the same parts are designated by the same reference numerals and the description thereof will be omitted.

The telescopic drive means in the work carriage 300 is
The first horizontal frame 3 provided on the first side frame 38
02 and the basic horizontal frame 30 provided on the basic frame 4
4 and a hydraulic cylinder 304 interposed between the worktable 8 and the hydraulic cylinder 304.
And a manual hydraulic pump 306 for expanding and contracting the hydraulic cylinder 304. The first horizontal frame 302 is composed of a square pipe member, and both ends thereof are fixed to the inside of each first side frame 38 (the first horizontal frame 40 in the work carriage 2 is composed of a round pipe member. ). Although not explicitly shown in the drawing, the base horizontal frame 304 is made of a square pipe member, and both ends thereof are fixed to the inside of each side frame 14 of the base frame 4. The hydraulic cylinder 304 is disposed between the longitudinal center portions of the first horizontal frame 302 and the basic horizontal frame 304, and the end of the cylinder 308 is rotatably connected to the basic horizontal frame 304, and the piston rod 3
The end portion 10 is rotatably connected to the first horizontal frame 302.

FIG. 19 is a hydraulic circuit diagram included in the expansion / contraction drive means of the work carriage 300. The suction side of the manual hydraulic pump 306 and the oil tank T are connected via an oil passage 312. Discharge side of manual hydraulic pump 306 and hydraulic cylinder 3
04 is connected to the piston head side via an oil passage 314. A check valve 316 is arranged in the oil passage 314. An upstream side of the check valve 316 of the oil passage 314 is connected to the oil tank T via an oil passage 320 in which a relief valve 318 is arranged, and a downstream side thereof is connected to an oil tank 324 in which a release valve 322 is arranged. It is connected to T. The manual hydraulic pump 306 has an operating lever 3
26 is attached, and a release lever (not shown) is also attached to the release valve 322. The operating lever 326 and the release lever constitute a telescopic manual operating means.
The release valve 322 opens the oil passage 324 when the release lever is open, and closes the oil passage 324 when the release lever is closed. In addition, a part of the oil passage 314 (specifically, a pressure-resistant hose) and a part other than the hydraulic cylinder 304 are incorporated into the manual hydraulic pump 306 as an assembly. Such a manual hydraulic pump 306 is attached to the bottom of the operation console 10.

The operation of the expansion / contraction drive means of the work carriage 300 configured as described above is as follows. When extending the expansion / contraction means 6, the release lever is positioned at the closed position and the oil passage 324 is closed. Next, the manual hydraulic pump 30
When the operating lever 326 of No. 6 is operated, the pressure oil is transferred to the oil passage 314.
Since it is supplied to the piston head side of the hydraulic cylinder 304 via, the piston rod 310 extends and the expansion / contraction means 6 extends. In response to this, the workbench 8 rises to a predetermined height. On the other hand, when contracting the expansion / contraction means 6,
Position the release lever to the open position and open the oil passage 324. The pressure oil supplied to the piston head side of the hydraulic cylinder 304 is returned to the oil tank T via the oil passage 324. The piston rod 310 contracts and the expansion / contraction means 6 contracts. In response to this, the workbench 8 descends to a predetermined height. In the contraction process of the expansion / contraction means 6, if the release lever is positioned at the closed position, the oil passage 324 is closed and the workbench 8
Is held at the desired height. These operations can be performed while the operator is on the workbench 8, and since hydraulic pressure is used, the workbench 8 can be raised and lowered more easily.

Although the present invention has been described in detail with reference to the embodiments, the present invention is not limited to the above embodiments, and various changes or modifications can be made within the scope of the present invention. is there.

[0035]

As described above, according to the movable / liftable work dolly according to the present invention described based on the embodiments, it is possible to easily move the work dolly, change the moving direction, and raise / lower the workbench manually. Moreover, it can be manufactured at a relatively low cost. Further, since the battery is not used, troublesome maintenance management can be omitted. Therefore, by using the movable / lifting work cart according to the present invention, fruit cultivation work in an orchard, high-place work at a construction site, building maintenance work,
It is possible to perform indoor and outdoor work in high places such as interior work of buildings efficiently and safely at relatively low cost.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a moving / lifting work trolley configured according to the present invention, with a part thereof broken away.

FIG. 2 is a front view of FIG. 1 as viewed from the left side, and is a partially cutaway view.

FIG. 3 is a schematic perspective view of the movable / liftable work cart shown in FIG.

FIG. 4 is a partial view of the movable / lifting work dolly shown in FIG. 3, showing a part thereof in a cutaway manner.

5 is a view showing a part of the clutch means shown in FIG. 2 in a cutaway manner.

6 is a sectional view taken along the line AA of FIG.

7 is a schematic perspective view showing a disassembled part of the clutch means shown in FIG.

8 is a schematic view for explaining the positional relationship between the clutch means and the clutch operating lever shown in FIG.

FIG. 9 is an enlarged top view of the movable / liftable work cart shown in FIG. 2.

FIG. 10 is an enlarged view partially showing the right side of the intermediate portion of the movable / liftable work cart shown in FIG.

FIG. 11 is an enlarged right side view of the lower portion of the movable / liftable work cart shown in FIG.

FIG. 12 is an enlarged view partially showing the left side of the upper portion of the movable / liftable work cart shown in FIG. 1.

FIG. 13 is an enlarged view partially showing an intermediate portion of the movable / liftable work carriage shown in FIG. 1.

FIG. 14 is an enlarged view partially showing the left side of the lower portion of the movable / liftable work cart shown in FIG.

FIG. 15 is an enlarged view partially showing the left side of the intermediate portion of the movable / liftable work cart shown in FIG.

16 is an enlarged left side view of the lower portion of the movable / liftable work cart shown in FIG.

FIG. 17 is a side view showing another embodiment of the movable / liftable work cart constructed according to the present invention.

FIG. 18 is a front view of FIG. 17 as viewed from the left side, with a part thereof broken away.

FIG. 19 is a hydraulic circuit diagram included in the extension / contraction drive means of the movable / lifting work truck shown in FIGS. 17 and 18.

[Explanation of symbols]

 2 Mobile / elevating work trolleys 4 Foundation frame 6 Expansion / contraction means 8 Working platform 10 Operating platform 12 Telescopic operation handle 18 Lower guide rail 22 Left axle 24 Left front wheel 26 Right axle 28 Right front wheel 34 First frame body 36 Second frame body 42 Upper guide roller 44 Telescopic driven horizontal frame means 44 50 Lower guide roller 58 Upper guide rail 70 Screw member 90 Left drive shaft 92 Right drive shaft 94 Clutch means 96 Left traveling operation handle 98 Right traveling operation handle 134 Clutch operation lever 150 Lock lever 300 Mobile / Elevating Work Cart 304 Hydraulic Cylinder 306 Manual Hydraulic Pump 326 Actuating Lever

Claims (5)

[Claims] 1. A base frame, a telescopic means mounted on the base frame and capable of expanding and contracting in a vertical direction, a workbench mounted on an upper end of the telescopic means, and an upright position at a front end portion of the workbench. An operation console provided, an extension / contraction drive unit for extending / contracting the extension / contraction unit, an extension / retraction manual operation unit provided on the operation console for operating the extension / contraction drive unit, and a traveling wheel mounted on the base frame. Means and a traveling drive means for driving the traveling wheel means, wherein the telescopic means has a lower end rotatably supported by the first frame means on the base frame and an upper end forward and backward on the workbench. A first frame body movably connected to the base frame and a first frame body rotatably connected to the first frame body by a second shaft means in a form intersecting the first frame body and a lower end portion to the base frame so as to be movable in the front-rear direction. Supported and the upper end is A second frame body rotatably connected to the work table by a third shaft means, and the traveling wheel means rotates integrally with a left axle rotatably supported on a left side of a front end of the base frame. And a right front wheel rotatably supported on the right side of the front end of the base frame so as to be able to rotate integrally therewith. A left drive shaft rotatably supported on the base, and a right drive rotatably supported on the operation base, arranged on the same axis as the left drive shaft, and rotatable relative to the left drive shaft. A shaft, clutch means for drivingly connecting or disconnecting the left driving shaft and the right driving shaft,
Clutch operation lever means provided on the operation console for operating the clutch means, left traveling operation handle provided on the operation console for rotationally driving the left drive shaft, and provided on the operation console A right traveling operation handle for rotationally driving the right drive shaft, left driving force transmission means for transmitting the rotational drive force of the left drive shaft to the left wheel, and rotational drive force of the right drive shaft. A moving / lifting work truck comprising: a right driving force transmitting means for transmitting the right driving force. 2. One end of the left drive shaft or the right drive shaft is rotatably connected to the other end of the other drive shaft, and the clutch means has both end portions near the one end of the one drive shaft. An engaging pin mounted so as to project outward in the radial direction, a cylindrical boss mounted so as to be axially movable and non-rotatable at the one end of the other drive shaft, and the boss. Spring means for axially biasing toward the engagement pin, the boss being formed to extend axially from an end portion facing the engagement pin, the boss being provided at both ends of the engagement pin. The clutch operating lever means includes at least a pair of notches that can be detachably engaged and an annular groove formed in the outer peripheral portion, and the clutch operating lever means is rotatably provided on the operating base and is orthogonal to the axial direction of the boss. A rotary shaft arranged to An operating pin provided at a position eccentric to the axis of the rolling shaft and having a tip end engaged with the annular groove of the boss; and a clutch operating lever formed so as to extend substantially L-shaped from the other end of the rotating shaft. The clutch operating lever has a first position in which rotation of the clutch operating lever is restricted to one side by the first stopper means and a second position in which rotation of the clutch operating lever is restricted to the other side by the second stopper means. When selectively positioned and the clutch operating lever is positioned in the first position, each of the notches in the boss engages the opposite ends of the engagement pin to engage the left drive shaft and the left drive shaft. The drive shaft is drivingly connected to the right drive shaft, and the urging force of the spring means rotates the clutch operating lever to the one side via the boss, the operating pin and the rotating shaft, so that the urging force of the rotating shaft with respect to the axis line. The position of the operation pin is specified, and the operation lever When positioned in the second position, each of the notches in the boss is disengaged from the ends of the engagement pin to disengage the left drive shaft and the right drive shaft from each other. And the position of the operation pin with respect to the axis of the rotation shaft is defined so that the biasing force of the spring means rotates the clutch operation lever to the other via the boss, the operation pin and the rotation shaft. The moving / lifting work trolley according to claim 1. 3. The left driving force transmitting means includes a left driving sprocket mounted on the left driving shaft so as to rotate integrally therewith, and a third shaft means of the telescopic means rotatably provided on the workbench. A left first relay shaft having a common axis, a pair of left first relay sprockets mounted on the left first relay shaft so as to rotate integrally with the left first relay shaft, and mutually integrated with the second shaft means of the expansion / contraction means. Pair of left second relay sprockets mounted so as to rotate freely, a left third relay shaft rotatably provided on the base frame and having a common axis with the first shaft means of the expansion and contraction means, A pair of left third relay sprockets mounted to the left third relay shaft so as to rotate integrally therewith, a left driven sprocket mounted to the left axle so as to rotate integrally therewith, and a left drive sprocket The left first relay Between one of the sprocket, the other of the left first relay sprocket and one of the left second relay sprocket, the other of the left second relay sprocket and one of the left third relay sprocket, and Between the other of the left third relay sprocket and the left driven sprocket,
A right drive force transmitting means, a right drive sprocket mounted on the right drive shaft so as to rotate integrally therewith, and a right drive sprocket rotatably provided on the workbench and extending and retracting the expansion means. A right first relay shaft having a common axis with the third shaft means, a pair of right first relay sprockets mounted on the right first relay shaft so as to rotate integrally therewith, and the second shaft means of the expansion / contraction means. A pair of right second relay sprockets mounted so that they can rotate integrally with each other, and a right third sprocket rotatably provided on the base frame and having a common axis with the first shaft means of the expansion and contraction means.
A relay shaft and a pair of right third relay sprockets mounted so as to rotate integrally with each other with respect to the right third relay shaft;
A right driven sprocket mounted on the right axle so as to rotate integrally therewith, between the right driving sprocket and one of the right first relay sprocket, the other of the right first relay sprocket and the right second relay sprocket. , The other of the right second relay sprocket and one of the right third relay sprocket, and the other of the right third relay sprocket and the right driven sprocket, respectively. The movable / liftable work truck according to claim 1, further comprising a chain. 4. The first frame body is provided on a pair of first side frames, a plurality of first horizontal frames connecting the first side frames, and an upper end portion of each of the first side frames. An upper guide roller and a telescopic driven lateral frame means for connecting the upper end portions of the first side frames to each other. The second frame body includes a pair of second side frames and the second side frame. A plurality of second horizontal frames for connecting the frames and a lower guide roller provided at a lower end portion of each of the second side frames are provided. Upper guide rails are provided so as to extend in the front-rear direction, and substantially channel-shaped lower guide rails are provided at both left and right sides of the upper surface of the base frame so as to extend in the front-rear direction.
Each of the upper guide rollers of the frame body is movably engaged with a corresponding upper guide rail of the worktable,
Each of the lower guide rollers of the frame body is movably engaged with the corresponding lower guide rail of the base frame, and the extension / contraction drive means extends in the front-rear direction at the center of the lower surface of the work table in the left-right direction. A screw member that is present and is rotatably provided so as not to move in the axial direction, is engaged with the central portion of the telescopic driven lateral frame means of the first frame body, and is rotatably provided on the operation console. A telescopic drive shaft, a drive sprocket mounted on the telescopic drive shaft so as to rotate integrally therewith, a driven sprocket mounted on the front end of the screw member so as to rotate integrally therewith, the drive sprocket and the driven sprocket And a chain connecting between the telescopic drive shaft and the manual operation means, wherein the telescopic manual operation means comprises an telescopic operation handle mounted on the telescopic drive shaft so as to rotate integrally therewith. Movement and elevating work truck. 5. The first frame body is provided on a pair of first side frames, a plurality of first horizontal frames connecting the first side frames, and an upper end portion of each of the first side frames. The second frame body includes a pair of second side frames, a plurality of second horizontal frames that connect the second side frames, and a lower end portion of each of the second side frames. A lower guide roller provided on the lower surface of the workbench, and upper and lower guide rails substantially in the shape of a channel are provided on both left and right sides of the lower surface of the work table so as to extend in the front-rear direction. Is provided with a substantially channel-shaped lower guide rail extending in the front-rear direction, a basic horizontal frame is provided with the basic frame, and each of the upper guide rollers of the first frame body is provided with the work table. Pair of Movably engaged with the upper guide rail, each of the lower guide rollers of the second frame body is movably engaged with the corresponding lower guide rail of the base frame, A hydraulic cylinder interposed between one of the first lateral frames provided on the first side frame and the basic lateral frame provided on the basic frame,
The movable / liftable work truck according to claim 1, further comprising a manual hydraulic pump provided on the workbench and for extending and contracting the hydraulic cylinder.