JPH047361Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hydraulic unit used in hydraulically driven equipment for working at high places, telescopic lighting, and the like.

(Prior art and its problems) Hydraulic units conventionally used in equipment for working at high places are integrally attached to the main body of the equipment and cannot be moved. It was extremely inconvenient.

(Technical means for solving the problems) The present invention solves the above problems, and its technical means is to provide a casing equipped with a pump 21, a motor 22, an oil tank 23, an electromagnetic switching valve 24, etc. 6 is placed and fixed on an underframe 7, and the casing 6 is provided with a cover body 20 that can be opened and closed to cover the upper surface. A connecting member 8 for connecting the hydraulic unit to a required location is attached to the front part of the underframe 7, and casters 9 for moving the hydraulic unit are attached to the rear lower surface of the underframe 7. In addition, the electromagnetic switching valve 24 is provided with a push button 33 for manual operation and a lever 34 for pressing the push button, and the lever 34 for pressing the push button is further provided with an emergency operation rope body 32, and the lever 3 is provided when the rope body 32 is operated in an emergency.
The locking weight 36 is attached to the locking weight 36 for locking the pressed state of the push button 4 in a weighted manner.

(Example) An example in which the present invention is implemented in a hydraulic unit of a device for working at high places will be described below based on the drawings.

Figure 1 shows a side view of the device for working at height, and Figure 2 shows its plan view.
indicates the main body of the device, and B indicates the hydraulic unit. The device body A includes a telescopic hydraulic cylinder 1, a workbench 2 interlocked with this, and the hydraulic cylinder 1.
An underframe 3 that holds the underframe vertically in a suspended state, and a plurality of casters 4 attached to the lower part of this underframe 3...
and a ladder 5 attached to the underframe 3 for getting on and off the workbench 2. Hydraulic unit B is constructed independently from equipment main body A.
The casing 6 is equipped with a pump (for example, a gear pump), a motor, an oil tank, a switching valve, etc., which will be described later. A connecting member 8 for connecting with the underframe 3 of the device main body A is provided at the
Further, two left and right casters 9, 9 are attached to the lower part, and a grip part 10 is provided at the rear end.

To explain the above structure in more detail, the hydraulic cylinder 1 is, for example, a three-stage single-acting telescope cylinder, and a disk-shaped workbench 2 is attached to the tip of the third stage (top stage) rod 1b. is fixed, and a protective fence 11 is provided on this workbench. The underframe 3 includes ring-shaped mounting brackets 12 at both upper and lower ends of the cylinder body 1a of the hydraulic cylinder 1.
and 13 are mounted and fixed, and the upper ends of four rigid frame members 14 made of pipes are pivoted at 90° intervals to the upper mounting bracket 12, and the lower mounting bracket 13 is equipped with a similar structure. One end of each of the four lower frame members 15 made of pipes is pivotally attached to a position corresponding to the rigid frame member 14, and each of the lower frame members 1
5 and the lower end of each rigid frame member 14 are removably pivotally connected, and a caster 4 is attached to the lower end of each rigid frame member 14. By separating the pivot joints between each rigid frame member 14 and each lower frame member 15, each rigid frame member 14 and lower frame member 15 can be folded onto the side surface of the cylinder body 1a of the hydraulic cylinder 1. . Further, the ladder 5 is provided with handrails 16, 16 made of pipes on both sides, the upper end of which is pivotally connected to the upper mounting bracket 12, and the lower end of the ladder 5 is provided with a pair of handrails on both sides. wheels 17, 17 are attached.

Next, the hydraulic unit B will be explained mainly with reference to FIG. 3. The casing 6 of the hydraulic unit B has a rectangular cylindrical casing body 18 with openings on both left and right sides and from the top to the front.
The casing of the casing 6 consists of net members 19, 19 stretched to cover the openings on both the left and right sides, and a cover body 20 that is openably and closably attached to the openings extending from the top surface to the front surface. The main body 18 is equipped with a gear pump 21, a pump drive motor 22, an oil tank 23, an electromagnetic switching valve 24, other valves (relief valve, flow rate adjustment valve, etc.), as well as piping, wiring, and the like. Further, the cover body 20 has its upper end edge pivotally attached to the opening edge of the casing body 18 so that it can be swung upward and opened, and is closed and fixed by a hook 25. An accommodating portion 26 for accommodating a cord or the like is recessed in the upper wall portion 20a of the cover body 20. Underframe 7
is made by bending a pipe material into a substantially L-shape when viewed from the side, and has inverted U-shaped connecting members 8, 8 formed at its front end, and these connecting members 8, 8 are connected to the main body A of the device. The connecting members 8 are adapted to be engaged with the lower frame member 15 that constitutes the underframe 3, and a detachment prevention member 27 can also be attached to the root portion of each connecting member 8. Further, the rear end portion of the underframe 7 is extended upward, and a grip portion 10 is formed at the extended end portion. Further, two left and right casters 9, 9 are attached to the rear side of the lower frame portion 7a of the underframe 7, and two left and right casters 9 are attached to the front side.
fixed leg members 28, 28 are attached, and these fixed leg members 28, 28 are attached to the lower frame portion 7a of the underframe 7.
is positioned horizontally and the casters 28, 28 are in contact with the ground, so that it is slightly suspended in the air. In this state, the underframe 7 is movable, so that the hydraulic unit B can be placed on the floor. When installed alone, the lower frame portion 7a is tilted forward as shown in Fig. 1, and the hydraulic unit B assumes a forward leaning position.
When the connecting member 8 is engaged with the lower frame member 15 of the underframe 3 on the apparatus main body side in order to connect the hydraulic unit B to the apparatus main body A, this hydraulic unit B assumes a horizontal position.

In Fig. 3, 29 is a power supply cord for hydraulic unit B, which is connected to the power source.
30 is a connection cord for the operation switch, the tip of which connects to the protective fence 11 on the workbench 2 in the main body A of the device.
It is connected to an operation switch 31 attached to the. Reference numeral 32 denotes an emergency operation cable made of rope, chain, string, etc., one end of which is fixed to an L-shaped operation lever 34 operatively connected to a manual operation push button 33 of the electromagnetic switching valve 24. The other end is detachably hooked to a desired part of the protective fence 11 with a hook 35. This operating lever 34 is pivotally mounted near the electromagnetic switching valve 24, and by pulling the cable body 32, the lever 34
pivots and the tip of the manual operation push button 33
, thereby opening the electromagnetic switching valve 24. At this time, the operating lever 3
A locking weight 36 is attached to the lever 4, and the locking weight 36 biases the lever 34 in a weighted manner so as to lock the state in which the lever 34 presses the manual operation push button 33. .
Note that resetting to the non-pressed state must be done manually. Further, 37 is an oil pipe that connects the hydraulic unit B and the hydraulic cylinder 1.

The operation of the device for working at high places described above will be explained with reference to FIGS. 1 to 3 and FIG. 4 showing the hydraulic circuit. Pull it to the side and engage the connecting member 8 with the lower frame member 15 of the underframe 3 to connect the two, and also hook the hook 35 at the tip of the emergency operation cable 32 to the protective fence 11. put. The cable body 32 is connected to the connecting cord 30 at several points to support the average weight of the connecting cord 30, and the tip of the cable body 32 is connected at approximately the same position as the cord 30 to form a protective fence. I make sure I don't forget to call 11. When the worker presses the up button on the operating switch 31 on the workbench 2, the pump 21 is activated by the rotation of the motor 22, and pressurized oil passes through the check valve side, passes through the oil pipe 37, and enters the telescope cylinder. 1, which causes each rod to extend and raise the work platform 2 to the required height. Also,
When the lower operation button is pressed, the electromagnetic switching valve 24 is switched from the closed position to the open position as shown in FIG. 19, thereby lowering the workbench 2 to its original position. If a power outage occurs or the plug of the power supply cord 29 is disconnected from the outlet when the work platform 2 is about to be lowered, the switching valve 24 remains closed and the work platform 2 is lowered. However, in an emergency like this, the string 32
When pulled, the manual operation push button 33 of the electromagnetic switching valve 24 is pushed via the operating lever 34, and the switching valve 24 is switched to the open position.
This means that it can be lowered. At this time, even if the cable body 32 is loosened, or even if the cable body 32 is loosened due to the lowering of the work platform 2, the operating lever 34 is biased by the locking weight 36 and continues to press the manual operation push button 33. This prevents the workbench 2 from stopping unexpectedly during its descent.

In addition, when the device is in use or moved, the extra length of the connection cord 30 can be removed from the cover pair 2 as shown in FIG.
By storing the cord 30 in the accommodating portion 26 of 0, it is possible to prevent the cord 30 from being accidentally hooked, thereby preventing the cord from breaking or being shot.

(Effects of the invention) According to the hydraulic unit of the invention, since the underframe has casters and a gripping part, it can be moved freely and is convenient to carry.
Furthermore, since the casing is provided with a cover body that can be opened and closed, it is possible to prevent damage to various devices such as the pump and motor due to falling objects.

In addition, since the hydraulic unit is equipped with a connecting means, by connecting it to a required device, such as a working moving device, it can be moved integrally on the same ground surface. Alternatively, if one of the hydraulic units is moved, the other will follow suit, resulting in extremely good workability.

Furthermore, the electromagnetic switching valve for operating the hydraulic cylinder provided on the underframe is equipped with a push button for manual operation and a lever for pressing the push button, and an emergency operation rope body is attached to the lever for pressing the push button, so there is no possibility of power outage or wire breakage. Therefore, even if the electromagnetic switching valve cannot be operated automatically, the electromagnetic switching valve can be manually operated by pulling the emergency operating cable, and it is possible to prepare for unexpected situations.

Furthermore, since a locking weight is attached to the lever for pressing the push button, which applies weight to lock the state in which the push button is pressed by the lever at the time of emergency operation of the emergency operating cable, the cable may be damaged due to some cause when the cable is pulled. Even if the push button is loosened, the lever for pressing the push button is biased by the locking weight and can still maintain the pressed state against the push button for manual operation. Therefore, the operation of the hydraulic cylinder does not stop during manual emergency operation. It's safe.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a side view of the device for working at heights in which the main body of the device and the hydraulic unit are separated, Fig. 2 is a plan view of the same, and Fig. 3 4 is a perspective view showing the hydraulic unit, and FIG. 4 is a hydraulic circuit diagram. B...Hydraulic unit, 6...Casing, 7...
... Underframe, 8 ... Connection member (connection means), 9 ... Caster, 10 ... Grip section, 20 ... Cover body, 2
6...Accommodation department.

Claims (1)

[Scope of utility model registration request] In a hydraulic unit, a casing equipped with a pump, a motor, an oil tank, an electromagnetic switching valve, etc. is mounted and fixed on an underframe, and this casing is provided with a cover body that can be opened and closed to cover the upper surface. A gripping part for gripping the hydraulic unit is attached to the rear part of the underframe, and a connecting member for connecting the hydraulic unit to the required location is attached to the front part of the underframe, and a part for moving the hydraulic unit is attached to the rear lower surface of the underframe. Attach the caster, and also attach a manual operation push button to the above electromagnetic switching valve.
A hydraulic unit comprising a lever for pressing a push button, and further equipped with a rope for emergency operation and a locking weight for weightily locking the state in which the push button is pressed by the lever when the rope is operated in an emergency manner. .