JPS643734Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cart with a ladder, which is constructed by attaching a ladder to a cart having wheels at the bottom of the loading platform.

Conventional carts have wheels attached to the lower part of the platform and a handle attached to one end of the platform. This device required a separate ladder when loading cargo at high places or lifting loaded cargo to high places. For this reason, it is difficult to transport cargo from high places.
When carrying out cargo, it is necessary to handle both a trolley and a ladder, which is particularly troublesome when there are scattered locations for carrying in and out of high-altitude cargo.

One possible solution to this problem is to attach a ladder to the trolley, but simply attaching a ladder of a uniform length to the trolley would make loading and unloading work complicated at work locations with different heights. Become.

This invention was made based on the above circumstances,
An object of the present invention is to provide a trolley with a ladder that facilitates loading and unloading work at work locations with different heights by providing an extendable ladder on the trolley, and also allows the ladder to be extended and contracted with a simple configuration. shall be.

In order to achieve the above object, the present invention is characterized by the following configuration.

That is, a pair of hollow main columns are fixed upright at the front end of the truck, a main ladder is connected to the main columns in parallel with the main columns, and a sub-pillar is fitted into the main column so as to be slidable in the vertical direction. A lifting platform is fixed to the upper end of the sub-pillar parallel to the trolley, a stay is fixed to the upper end of the sub-pillar protruding in the front direction, a sub-ladder is arranged on the front side of the main ladder, and the upper end of the sub-ladder is is slidably inserted into the stay, a suspension piece capable of engaging with the stay is provided at the upper end of the sub-ladder, and a drive device for vertically moving the sub-staff is provided on the main support.

Hereinafter, an embodiment in which the above configuration is embodied will be described based on the drawings.

In the drawings, FIG. 1 is a side view of a trolley with a ladder according to the present invention, FIG. 2 is a rear view of the cart as seen from the left, and FIG. 3 is a side view showing the procedure for extending and contracting the ladder.

In the drawings, reference numeral 1 denotes a truck, and wheels 3 are attached to each of the four corners of the lower surface of a rectangular loading platform 2. A pair of main struts 4 made of C-shaped steel are fixed to the right end of the truck 1 in FIG. 1 while tilting leftward.

The main support 4 has longitudinally extending slits 5 arranged opposite to each other.

Sub-posts 6 made of square pipes are slidably fitted into the main posts 4, respectively, and a rectangular lifting platform 7 is fixed to the upper end of the sub-posts 6.

This elevating loading platform 7 is arranged above and parallel to the loading platform 2 described above.

A main ladder 8 is attached to the right side of the main support 4 in FIG. 1, that is, to the front side.

The main ladder 8 has three treads 10a, 10b, and 10c spanned between a pair of pillars 9, 9 made of pipe material at a predetermined interval in the vertical direction.
Then, each pillar 9 was slidably fitted into the upper and lower stays 11a and 11b fixed to the front wall of each main pillar 4, and fixed to the lower stay 11b and each pillar 9 located above the lower stay 11b. By interposing a spring 12 made of a coil spring between the main ladder 8 and the spring receiver 9a, the main ladder 8 is elastically lifted up and supported by the main column 4.

A sub-ladder 13 is attached to the right side in FIG. 1, that is, to the front side of the above-mentioned sub-pillar 6.

The sub-ladder 13 is constructed by spanning three treads 15a, 15b, 15c at a predetermined interval in the vertical direction between a pair of pillars 14, 14 made of pipe material. Each pillar 14 is slidably and swingably loosely fitted into a stay 16 protruding and fixed to the front side of the upper end of each sub-support pillar 6, and the top of each pillar 14 has a large size that can be engaged with the stay 16. A suspension piece 14a having a diameter is provided.

The pillars 14 of the secondary ladder 13 are formed to have the same width as the pillars 9 of the main ladder 8 described above, and a conical locking piece 9b for fitting and locking the lower end of the pillar 14 is protruded from the top of the pillar 9. Fix it.

Further, the above-mentioned main column 4 is provided with a drive device 17 for vertically moving the sub-column 6 and therefore the sub-ladder 13.

This drive device 17 is constructed as follows. That is, as shown in FIG. 2, a rope winder 18 that rotates the drum 20 in forward and reverse directions using a handle 19 is attached to the back of the left main support 4a, and
Fix the rope locking pin 21 to the upper inner wall of b,
A guide pulley 22 is attached to the upper inner wall of the left main column 4a.
, and on the other hand, on the inner wall of the lower end of each sub-support 6,
A moving pulley 23 is installed which projects inward through the slit 5 of each main support 4. The rope 23, whose one end is locked to the rope locking pin 21, is wound around the moving pulleys 23, 23 and then around the guide pulley 22, and then the other end is wound around the drum 20.

In addition, 7a in the figure is a handle attached to the lifting platform 7,
Reference numeral 4c denotes a reinforcing cross bar spanning between the main columns 4a and 4b.

Next, the functions and effects of the above embodiment will be explained.

First, when loading and unloading cargo from relatively low places, as shown by the solid line in Figure 1,
lower to the lowest position and move the secondary ladder 13 to the main ladder 8.
Leave it in a polymerized state.

In this state, when carrying in/out cargo from a high place, the steps 15a to 15c shown in the figure are used to climb up and down. When a worker steps on the steps 15a to 15c, the load is transmitted to the pillar 9 of the main ladder 8 via the steps 10a to 10c, which causes the spring 12
is bent and its lower end touches the ground 25, and the trolley 1 becomes inoperative, allowing the worker to climb up and down safely.

Next, when loading or unloading cargo from a higher location, the drum 20 is first rotated in the forward direction using the handle 19 to wind the rope 24. As a result, the movable pulley 23 moves upward, and the auxiliary column 6 moves upward, so the stay 1
6 moves up.

When the upward movement of the secondary column 6 reaches a predetermined value, the stay 16 collides with the suspension piece 14a, and the column 14, and thus the secondary ladder 13, begin to move upward.

When the secondary ladder 13 begins to move upward, the worker rotates the secondary ladder 13 to the right as shown in FIG.
The above-mentioned handle 19 is rotated in the forward direction while c is spaced to the right from the steps 10a to 10c of the main ladder 8.

In this way, if you move the secondary column 6 up to the maximum, then lift the secondary ladder 13 slightly by hand, and lock the lower end of the column 14 to the upper end of the column 9, that is, the locking piece 9b,
As shown by the imaginary line in Figure 1, the secondary ladder 13 is the main ladder 8.
connected in series with

This makes it possible to load and unload cargo from higher places.

When lowering the secondary ladder 13, remove its lower end from the upper end of the main ladder 8, rotate the handle 19 in the opposite direction while rotating the secondary ladder 13 forward as shown in FIG. All you have to do is unwind the rope 24.

As is clear from the above embodiments, according to the configuration of the present invention, the ladder provided on the trolley is extendable and retractable, so it is extremely easy to carry in and out of a work site where there are differences in height. In addition, the upper end of the secondary ladder is rotatably and suspendably connected to the upper end of the secondary pillar, which is fitted into the main pillar so that it can move up and down. Since the auxiliary support is supported by the strong main support, work at heights can be carried out safely.

In addition, this invention is based on the tread 1 at the bottom of the sub-ladder 13.
5c on the middle tread 10b of the main ladder 8 or the upper tread 10a, the amount of extension of the secondary ladder 13 can be changed to two stages from the solid line state to the virtual line state in FIG. Can be switched.

[Brief explanation of the drawing]

Figure 1 is a side view of a trolley with a ladder according to the present invention;
FIG. 2 is a rear view of the ladder, and FIG. 3 is a side view showing the ladder in its telescopic operating state. 1... Trolley, 2... Loading platform, 3... Wheels, 4...
Main support, 5...Slit, 6...Sub-support, 7...
Elevating loading platform, 8... Main ladder, 9... Pillar, 9a... Spring holder, 9b... Locking piece, 10a to 10c... Treadboard, 11a, 11b... Stay, 12... Spring,
13... Secondary ladder, 14... Pillar, 14a... Hanging piece, 15a-15c... Treadboard, 16... Stay,
17... Drive device, 18... Rope winder, 19
... Handle, 20 ... Drum, 21 ... Locking pin, 22 ... Guide pulley, 24 ... Rope.

Claims (1)

[Scope of utility model registration request] A pair of hollow main struts are fixed upright at the front end of the truck, a main ladder is connected to the main struts in parallel with the main struts, and a sub-branch is fitted into the main struts so as to be slidable in the vertical direction. A lifting platform is fixed to the upper end in parallel with the trolley, a stay is fixed to the upper end of the sub-pillar so as to protrude in the front direction, a sub-ladder is arranged on the front side of the main ladder, and the upper end of the sub-ladder is fixed to the front side of the main ladder. A dolly with a ladder, characterized in that a suspension piece is slidably inserted into the stay, a suspension piece that can be engaged with the stay is provided at the upper end of the sub-ladder, and a drive device that moves the sub-post up and down is provided on the main support.