JPH0625509Y2 - Work trolley - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a work trolley which is employed, for example, when working indoors at a high place.

2. Description of the Related Art Conventionally, work trolleys of this type include, for example, Shoko 61-1.
As can be seen in Japanese Patent No. 8000, a workbench was provided on a trolley via a multi-stage telescopic lifting column, a lifting drive device was provided between the trolley and the lifting column, and a lifting operation unit was provided on the workbench. Structure is provided.

According to this conventional type, an operator on the workbench operates the elevating and lowering operation unit, and based on this, the elevating and lowering drive device is driven forward and backward to elevate and lower the workbench and stop the elevating and lowering at a desired height. Therefore, the desired high-altitude work is performed.

However, according to the above-mentioned conventional method, especially when an operation error occurs during ascent, an operator or a work table may hit other objects such as piping on the ceiling side, resulting in personal injury or damage. become.

The object of the present invention is to detect the other object and stop the ascending automatically when the ascending work table approaches a set distance with respect to another object, and then to perform manual operation. The point is to provide a work cart that can be lifted.

Means for Solving the Problems In order to achieve the above-mentioned object, a work platform of the present invention is provided with a work platform on a main body of a platform through an elevating device, and the work platform is lifted by a lifting operation unit and its detection movement. An ascending limit detecting device for stopping the ascending operation and an ascending / descending operation part for ascending stop are provided. A lock operation device is provided which is operated when the limit detection device is turned over to lock at least the ascending movement of the lifting device.

According to the structure of the present invention, the operator on the workbench operates the elevating and lowering operation section, and based on the operation, the elevating device is operated in the forward and reverse directions to raise and lower the workbench. When the ascending work table approaches a set distance with respect to another object, the other object is detected by the ascent limit detection device, and the ascending movement of the lifting device is automatically stopped. When it is desired to raise the work table by a certain distance after such a stop, it is sufficient to operate the release operation unit to release the raising stop and to raise the lifting operation unit. When the workbench is set to the desired height and the lift limit detector is laid down sideways, the lock operating device is operated to lock the lifting / lowering motion of the lifting device, causing the workbench to lift at least at all. In addition, the ascending limit detection device that is laid down is in a position where it does not interfere with work.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 is a trolley body having a plurality of wheels 2. Arm rods 4, which are swingable, are attached to four corners of the trolley via vertical pins 3, and the ends of these arm rods 4 are grounded via screw-type lifting shafts 5. The body 6 is attached. A multistage telescopic lifting column 7 is provided on the trolley body 1, and in the embodiment, a fixed column 8 erected on the trolley body 1 and a first lifting column 9 supported and guided by the fixed column 8.
It is composed of a second elevating column 10 supported and guided by the first elevating column 9, and a third elevating column 11 supported and guided by the second elevating column 10. Further, a rope is hung between the columns. In addition, by providing the cylinder device 12 that interlocks with the first elevating column 9, the elevating device 13 is configured as a whole. A support rod 14 is provided between the trolley body 1 and the fixed column 8, and a control device 15 is provided on the back side of the fixed column 8. A workbench 16 is attached to the front surface of the third elevating column 11, and the workbench 16 includes a platform 17, a safety fence 18 surrounding the four sides on the platform 17, and a front side of the safety fence 18. It consists of a detachable chain 19, etc. On the rear side of the safety fence 18, an elevating operation section 22 having an ascending button 20 and a descending button 21 is provided on the upper right side, and a release operating section 24 having an operation button 23 is provided on the upper left side. Further, in the vicinity of the inner side of the release operation part 24, an ascending limit detection device 25 that stops the ascending motion due to the detection motion thereof is provided. The rising limit detecting device 25 is composed of, for example, a reflection type ultrasonic range finder, detects and moves when the object A approaches the set distance L, and gives a rising stop signal to the controller 15. Further, the ascent limit detecting device 25 can be switched between the standing posture which is the working position and the sideways posture which is the non-working position. That is, a channel-shaped bracket 26 having an open upper surface and both side surfaces is attached to the safety fence 18. A front and rear direction pin 27 is attached to the upper portion of the bracket 26 via a screwing portion 28, etc., and the front and rear direction pin 27 is capable of swinging a plate body 29 positioned in the bracket 26 around a front and rear direction axis 30. To support. A lever 31 is erected from the upper surface of the plate body 29, and the rising limit detecting device 25 is attached to the upper end of the lever 31 via a support tool 32. The plate 29
The stopper device 33 is a cylindrical holder 35 penetrating the front plate of the bracket 26 and attached via a screwing portion 34,
A stopper pin 36 is arranged in the holder 35 so as to be movable back and forth, a rod 37 extending forward from a front portion of the stopper pin 36, an operation tool 38 attached to a front end of the rod 37 protruding from the holder 35, and the stopper pin. The plate 39 is formed with a spring 39 that biases the projection 36 rearward and is disposed in the holder 35. The plate body 29 is formed with a locking hole 40 into which the stopper pin 36 can be inserted and removed. A limit switch 41, which is operated by a lever 31 when the ascending limit detecting device 25 is laid down, is provided near the bracket 26 on the center side, and this is operated by a control device 15 through a control device 15. It is an example of a lock operating device for locking the ascending motion at least.

Next, the work using the work cart of the above embodiment will be described.

First, the work cart is driven to a desired point. Although the embodiment shows a traveling type by pushing by hand or the like, this may be a self-propelled type. During this running, the grounding body 6 is raised and the arm rod 4 is swung inward, so that the solid line in FIG.
Also, it is housed in the trolley body 1 as shown by a virtual line H in FIG. Once you reach the point of interest,
As shown by the solid line in FIG. 3 and the phantom line in FIG.
Is swung outward and the grounding body 6 is landed. Next, the desired high-altitude work is performed, which is performed by the worker climbing up to the platform 17 and raising the work platform 16 to a predetermined height by the elevating device 13. In other words, lever 31 to plate 29
Along with the front-rear direction axial center 30, the rising limit detecting device 25 is made to oscillate upright so that the rising limit detecting device 25 is in an upward acting posture.
The stopper pin 36 is fitted into the locking hole 40 by the force of 39 to maintain the standing swing position. As a result, the ultrasonic wave B is emitted upward from the rising limit detection device 25, and the set distance L at which reflection can be detected at this time is adjusted. In this state, the operator on the platform 17 presses the lift button 20 so that the control device 15
The elevating device 13 is moved upward via the, and the workbench 16 is raised. Further, by pushing down the lowering button 21, the lifting device 13 is lowered, and the workbench 16 is lowered. After raising the workbench 16 to a desired height and stopping it, the stopper pin 36 is moved forward through the operation tool 38 against the spring 39 and pulled out from the locking hole 40. Then lever 31 together with plate 29
Sideways around the longitudinal axis 30
25 is the horizontal non-acting position. At this time, as shown by the phantom line in FIG.
This operation motion locks at least the ascending motion of the elevating device 13 via the control device 15, so that the workbench 16 cannot be ascended or elevated. Therefore, the platform
17 Various operations from above can be performed stably and safely. In this state, it is also possible to only lower the workbench 16 with the lowering button 21. After completing the desired work, lever 31
By oscillating upright and not operating the limit switch 41, as described above, the work table 16 is lifted by the up button 20 and the down button 21.
Can be raised and lowered.

While raising the work table 16 as described above, for example, as shown in FIG.
As shown by the phantom line in FIG. 2, when another object A is located within the set distance L ₁ , the ascending limit detecting device 25 detects and moves the ascending / descending device 13 via the control device 15 automatically. As a result, it is possible to prevent the operator or the workbench 16 from colliding with another object A due to an operation error at the time of raising. Due to work level,
When there is another object A within the set distance L ₁ but wants to raise the workbench 16, the worker on the platform 17 presses the operation button 23 of the release operation unit 24 to stop the lifting movement of the lifting device 13 described above. It suffices to release it and press the up button 20 of the up-and-down operation unit 22 with sufficient care.

At the set distance L, the ultrasonic wave B is set in a range including the elevating column 7, the workbench 16, the ascending limit detecting device 25, etc., as shown in FIG.

EFFECTS OF THE INVENTION According to the present invention having the above-described configuration, the operator on the workbench operates the elevating and lowering operation unit, and based on that, the workbench can be elevated and lowered by operating the elevating device in the forward and reverse directions. Then, when the rising work table comes close to the set distance with respect to another object, the other object is detected by the ascent limit detection device, and the ascending movement of the lifting device can be automatically stopped. It is possible to prevent the worker or the work table from hitting another object due to an operation mistake at the time, and it is possible to prevent personal injury or damage. Also, after such a stop,
When it is desired to raise the workbench by a certain distance, it can be easily performed by operating the release operation unit to release the raising stop and operating the raising / lowering operation unit. By setting the workbench to the desired height and then tilting the lift limit detection device sideways, the lock operating device can be operated to raise or lower the lifting device, and the workbench can be lifted at least at all. In addition to the non-performing state, the ascending limit detecting device can be placed at a position where it does not interfere with the work, so that various works from the workbench can be performed stably and safely.

[Brief description of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view and a second view.
The drawing is a side view, FIG. 3 is a plan view, FIG. 4 is a partially cutaway side view of an essential part, and FIG. 5 is a view taken along the line VV in FIG. 1 ... Car body, 7 ... elevation column, 13 ... elevation device, 15 ...
… Control device, 16 …… Workbench, 17 …… Bed, 18 …… Safety fence, 20 …… Up button, 21 …… Down button, 22 …… Up / down operation part,
23 ...... Operation button, 24 ...... Release operation part, 25 ...... Lifting limit detection device, 26 ...... Bracket, 27 ...... Front and rear direction pin, 29 ......
Plate, 31 ... Lever, 33 ... Stopper device, 36 ... Stopper pin, 40 ... Locking hole, 41 ... Limit switch (lock operation device), A ... Other things, B ... Ultrasonic wave, L ・
L ₁ …… Set distance.

Claims (1)

[Scope of utility model registration request] 1. A workbench is provided on a trolley body via an elevating device, and an elevating and lowering operation part, an ascending limit detecting device for stopping an ascending motion by its detection motion, and a lifting stop canceling operation part. The rising limit detecting device is provided so as to be switchable between an upright posture which is an operating position and a sideways posture which is a non-operating position, and is operated when the rising limit detecting device is lying down to raise at least the lifting device. A work trolley provided with a lock operation device for locking movement.