JPH0331661Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a trolley for carrying cargo into and out of a cargo loading surface of an automobile.

``Prior Art'' Conventional trolleys for loading and unloading cargo onto the cargo loading surface of automobiles are generally equipped with casters below the deck, and are only used to load and unload cargo on the deck. It was hot.

``Problem that the invention aims to solve'' However, with such conventional trolleys, it is necessary to load and unload cargo onto the trolley when loading and unloading cargo. Then, the goods are loaded onto a trolley from the warehouse, transported to the car, then reloaded onto the loading surface of the car, then reloaded onto the trolley at the unloading area, and this process is repeated as many times as necessary. The problem was that it was extremely complicated and had poor cargo handling efficiency, making it impossible to handle a large amount of cargo.

The present invention has been developed by focusing on these conventional problems, and aims to provide a trolley that solves the above-mentioned problems by being able to be carried in and out of the loading surface while loaded with cargo. It is said that

``Means for Solving Problems'' The gist of the present invention to achieve this purpose is to provide a trolley that can be carried in and out of a loading surface higher than the running road surface, and is placed at the front and back under the deck. and integral support legs on both sides with casters that can be raised and lowered are each pivotally connected to the deck, and a lock mechanism is provided between the deck and each support leg to restrict the support legs to the upright position, and the lock The mechanism includes: a locking member fixedly installed under the deck and provided with a plurality of locking notches; a base end pivotally connected to the base of the support leg, and the support leg tilting corresponding to the height of the deck with respect to the running road surface. A detent member is biased by a biasing spring so that its tip engages with an appropriate locking notch of the locking member according to the locking condition, and the detent member is supported on the deck so as to be displaceable between a locked position and an unlocked position. In the locked position, the tip of the detent member is in a position that allows the tip of the detent member to engage with the locking notch of the locking member, and in the unlocked position, a portion of the detent member engages with a portion of the detent member and the tip thereof a pushing member which is disposed so as to be in a position where it is removed from the locking notch of the locking member and is normally biased to the locked position; a lock release lever having an upper end connected to the pushing member and performing a lock releasing operation to displace the pushing member to an unlocking position; The truck is characterized in that it is provided with a lock release lever of each mechanism, and is arranged to release the lock when the tip end of the lock release lever comes into contact with the end of the loading surface.

``Operation'' When the trolley is brought close to the loading surface with the supporting legs upright, the lock release lever on the front supporting leg first hits the edge of the loading surface and the locking mechanism of the supporting leg is released. The supporting legs are broken and the trolley is carried in by being placed on the loading surface by the carrying casters.

When the trolley is advanced further, the lock release lever on the rear supporting leg hits the edge of the loading surface and the locking mechanism of that supporting leg is released, and as with the front supporting leg, when the trolley is advanced further, the rear supporting leg breaks and is transported. The trolley is carried completely on the loading surface using the casters.

When unloading a loaded truck, move the truck back from the loading surface. When the rear support leg retreats to a position where it is removed from the loading surface, the broken rear support leg stands facing the running surface, and the detent member fits into the corresponding locking notch of the locking member depending on the height of the loading surface with respect to the running surface. When engaged, the rear supporting leg is restrained by the locking mechanism at an appropriate height.

Similarly, the front support leg also stands according to the height of the loading surface.
The trolley can be safely lowered from the loading surface onto the running road surface.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

The figure shows one embodiment of the present invention, and as shown in FIG. 2, a trolley 10 is carried in and out of a loading surface A, which is the rear deck of an automobile, for example. As shown, support legs 30, 30a that can be raised and lowered are provided below the deck 20, and lock mechanisms 40, 40a are provided between the truck 10 and the support legs 30, 30a to restrict them to the upright position.

The deck 20 consists of a cargo storage board 21 supported by a frame 22, and pivot brackets 23, 23 that support the support legs 30 and pivot brackets 24, 24 that support the support legs 30a are fixed to the horizontal frames 22a, 22a of the frame 22. It is set up.

The supporting leg 30 and the supporting leg 30a, and the locking mechanism 40 and the locking mechanism 40a have almost the same structure, so the supporting leg 30 and the locking mechanism 40 will be explained as a representative, and the supporting leg 30a and the locking mechanism 40a will be explained as a representative.
The same parts are denoted by the same reference numerals, and redundant explanation will be omitted.

The support legs 30 are respectively provided on the horizontal frames 22a on both sides of the frame 22, have casters 31 at their tips that are in contact with the road surface, and have their bases pivotally connected to the support brackets 23 via pivots 32.

A connecting shaft 33 is installed at a position a little apart from the pivot 32 at the base of the supporting legs 30 on both sides, and a shoe 34 is fixedly installed near the tip of the supporting legs 30, which slides into contact with the mounting surface A when the supporting legs 30 are folded. There is.

The locking mechanism 40 is provided between the supporting leg 30 and the central frame 25 of the frame 22 of the deck 20.

That is, the base cylinder 41a of the detent member 41 is loosely fitted onto the connecting shaft 33, and the arms 41b, 41b, 41c whose bases are fixed to the base cylinder 41a extend toward the central frame 25 of the frame 22 with their tips converging. , where it is fixed to the engagement bar 42.

The engagement bar 42 has both ends protruding on both sides so as to be engaged with and disengaged from a locking member 43 fixed to the central frame 25 of the deck 20, and has a locking notch 43a in which the end of the engagement bar 42 engages with the locking member 43. , 43b, 43c are the engagement bars 4
The locking notches 43a, 43b, 43c are provided according to the height of the mounting surface A. The detent member 41 is biased by a biasing spring 44 in a direction in which the engagement bar 42 engages with the locking member 43 .

A lock release lever 45 of the lock mechanism 40 is provided in front of the base of the support leg 30, and a pushing member 46 is provided inside the central frame 25 of the deck 20 facing the engagement bar 42.
is provided.

As can be seen in FIGS. 5 and 6, the lock release lever 45 has a pushed shaft 45a at its tip that protrudes below the deck 20, and a base that is a bracket fixed to the central frame 25 of the deck 20 with a pivot 45b. 25
The base of the lock release lever 45 extends inside the central frame 25, and a push member 46 is attached to the tip thereof.
One end 46a of the two is pivotally connected. In addition,
In Figure 1, the upper end of the lock release lever 45 is located on the deck 2.
Although it appears to be pivoted on the 0 side, the base on the upper end side of the lock release lever 45 is hidden behind the center frame 25.

The other end of the pushing member 46 is connected to the central frame 25 of the deck 20.
The auxiliary link member 47 extends rearward inside the
One end of the auxiliary link member 47 is pivotally supported by a pivot 46b, and the other end of the auxiliary link member 47 is pivotally connected to a bracket 25b fixed to the central frame 25 of the deck 20 via a pivot 47a. member 46,
The auxiliary link member 47 forms a parallel link mechanism based on the central frame 25, and the pushing member 46 is provided with a pushing surface 46c that pushes the engagement bar 42. The lock release lever 45 is erected between the intermediate part of the auxiliary link member 47 and the central frame 25, and the push member 46
A biasing spring 48 is tensioned to keep it retracted into the center frame 25. As mentioned above, the pushing member 46 is
The locking position shown by the solid line in FIG. Locking notches 43a, 43b, 43
It is supported so that it can be displaced between the lock release position shown in phantom lines in FIG.

At the lower part of the deck 20, casters 26, 26, . . . are disposed at the four corners, which are grounded on the mounting surface A when the supporting legs 30, 30a are folded and transported.

Next, the effect will be explained.

As shown in FIG. 1, when the supporting legs 30, 30a are in an upright position, the engagement bar 42 of the detent member 41 of the locking mechanism 40 engages with the engagement notch 43a of the engagement member 43 due to the biasing force of the biasing spring 44. When engaged, the support leg 30 is held in an upright state, and the lock mechanism 40a
Similarly, the support leg 30a is held in an upright position.
A lock release lever 45 also stands at the bottom of the deck 20. Therefore, even if the cargo is placed on the trolley 10, it is stable and can be moved smoothly by the casters 31.

When the cart 10 is moved from the supporting leg 30 side (left side in FIG. 2) to the mounting surface A for loading, the front caster 26 lands on the mounting surface A, and the lock release lever 45 Pressed shoe 45a
interferes with and abuts on the edge of the mounting surface A. If the cart 10 is pushed further, the lock release lever 45 will be pushed down by the end of the mounting surface A.

When the lock release lever 45 falls, as shown in FIG. is pushed out to a position protruding from the locking notch 43a, whereby the engaging bar 42 is released from the locking notch 43a,
Lock mechanism 40 is unlocked.

When the lock mechanism 40 is unlocked, the supporting leg 30
becomes foldable, and when the cart 10 is pushed further, a part of the support leg 30 comes into contact with the end of the mounting surface A, and the support leg 30 is folded backward, and finally the caster 26
folded inside.

The supporting leg 30a is folded later than the supporting leg 30. That is, in the lock mechanism 40a, the pushed shoe 45a of the lock release lever 45 comes into contact with the end of the mounting surface A, and the lock mechanism 40a is unlocked, and the support leg 30a is also folded inside the caster 26, and the rear caster 26 is also placed on the mounting surface A, and the trolley 10 is carried onto the mounting surface A.

To take out the cart 10 that has been carried in, pull out the cart 10 from the mounting surface A in the opposite manner as described above.
0a comes out first, but the support leg 30a hangs down due to its own weight and stands downward from the deck 20, and the locking mechanism 4
When the lock release lever 45 of 0a is removed from the end of the mounting surface A, the engagement bar 42 engages with the locking notch 43a of the locking member 43 and is locked.

The support leg 30 similarly stands up due to its own weight, and when the lock release lever 45 of the lock mechanism 40 comes off the end of the mounting surface A, it is locked and can be pulled out onto the running road surface.

Depending on the loading and unloading situation, the height of the running road surface and the mounting surface A
When the height changes, the engagement bar 42 engages with the locking notch 43b or 43c of the locking member 43, and the height is automatically adjusted according to the angle of the supporting leg 30 or supporting leg 30a when standing. can be adjusted accordingly.

It should be noted that the locking mechanism in the above embodiment is merely an example, and it goes without saying that other suitable locking mechanisms may be used.

"Effects of the invention" According to the trolley according to the present invention, the cart can be carried in and out with cargo loaded in it, and furthermore, the support legs of the cart are automatically folded and erected as the cart is carried in and out, so no operation is required. Because of this, it is easy to operate and handle.
There is almost no need to transfer cargo onto the trolley, dramatically improving cargo handling efficiency.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of the cart, Fig. 2 is an explanatory diagram showing the state of loading and unloading, and Fig. 3 is the bottom of the cart. 4 is a sectional view taken along the line of FIG. 1, FIG. 5 is an explanatory view of the main part of the lock mechanism, and FIG. 6 is a longitudinal sectional view of the truck. 10... Trolley, 20... Deck, 21... Loading board, 22... Frame, 30, 30a... Support leg,
40, 40a...Lock mechanism, 45...Lock release lever.

Claims (1)

[Scope of claim for utility model registration] A trolley that can be carried in and out of a loading surface higher than the running road surface, which is placed at the front and rear under the deck, and has integral supporting legs on both sides that can be raised and lowered with casters. A locking mechanism is provided between the deck and each supporting leg, the locking mechanism being pivotally attached to the deck and regulating the supporting leg to an upright position, the locking mechanism being fixedly installed below the deck and having a plurality of locking notches. A locking member is provided, the proximal end is pivotally connected to the base of the support leg, and the distal end engages with an appropriate locking notch of the locking member in response to inclination of the support leg corresponding to the height of the deck with respect to the running road surface. A detent member is biased by a biasing spring so that the detent member is supported on the deck so as to be movable between a locked position and an unlocked position, and in the locked position, the tip of the detent member is inserted into the locking notch of the locking member. The detent member is disposed in such a position that a portion thereof is engaged with a portion of the detent member and the distal end thereof is removed from the locking notch of the locking member in the unlocked position. , a pushing member that is normally biased to the lock position; a pivoting member that is pivoted on the deck so as to project downwardly from the deck, and whose swinging upper end is connected to the pushing member; A lock release lever for each of the lock mechanisms is provided in front of the base of each support leg, and the tip of the lock release lever A trolley characterized by being arranged so that a lock is released when it comes into contact with an end of a loading surface.