Loading-platform space extension device for dolly
The detachable loading platform space expansion device for carts addresses the complexity and cost issues of existing expansion mechanisms by allowing easy retrofitting onto existing carts, providing efficient and convenient cargo loading space expansion.
Patent Information
- Application Number
- JP2023194360
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-11-15
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2043-11-15
AI Technical Summary
Existing cart loading platforms that expand loading space require complex slide mechanisms, increasing cost and complexity, and necessitate purchasing a new cart with the expansion feature, even for those already owning a cart.
A detachable loading platform space expansion device for carts, featuring a plate-shaped device body with a hinge connecting two halves, which can be easily retrofitted onto existing carts by inserting mounting convex portions into through holes on the cart's loading platform.
The device allows for easy expansion of loading space on existing carts without increasing complexity or cost, enabling users to load more cargo efficiently and conveniently.
Smart Images
Figure 2025080945000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a loading space expansion device for a cart that can expand the loading space by simply attaching it to the loading platform when the loading space of the loading platform of the cart is insufficient.
Background Art
[0002] A handcart consisting of a loading platform on which loads can be loaded, wheels (casters) suspended vertically below the loading platform, and a handle for pushing erected on the upper part of the loading platform is well received.
[0003] In addition, in order to further improve the convenience of this type of cart, the applicant has proposed the following Patent Document 1 in which the loading platform can be horizontally slid and protruded left and right and back and forth as needed to expand the loading space.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] Although the above Patent Document 1 can expand the loading space by horizontally sliding and protruding the loading platform left and right and back and forth as needed, it is highly convenient. However, since the loading platform itself has a slide mechanism in which a part of the loading platform slides in the front-rear and left-right directions, the structure becomes complicated and the cost increases. Also, when a loading space expansion function for the loading platform is desired, even if one already owns a cart, a cart having this loading space expansion function had to be additionally purchased.
[0006] Unlike those with an extended loading space function in the loading platform itself as in the above Patent Document 1, the present invention provides a loading platform space expansion device for a trolley that can be easily retrofitted to the loading platform of an existing trolley to expand the loading space of the loading platform if the trolley is already owned.
Means for Solving the Problems
[0007] The gist of the present invention will be described with reference to the accompanying drawings.
[0008] A loading platform space expansion device for a trolley that is detachably placed on the upper surface of a loading platform 3 of a trolley A having a loading platform 3 with wheels 2 provided with at least through holes 1 at front and rear positions, The plate-shaped device body 4 placed on the loading platform 3 has a first half 5 and a second half 6 connected via a hinge portion 7, and is configured to be switchable between a use deployment state D in which the first half 5 and the second half 6 are arranged flush with each other and a folded state F in which the first half 5 and the second half 6 are folded in two so as to overlap each other by the hinge portion 7, The device body 4 in the use deployment state D is configured in a shape in which the loading space is expanded to be larger than the upper surface portion that becomes the loading space of the loading platform 3, This device body 4 is provided with mounting convex portions 8 to be inserted into the front through holes 1 at the lower part of the first half 5, and mounting convex portions 8 to be inserted into the rear through holes 1 are provided at the lower part of the second half 6, and the device body 4 in the use deployment state D is configured to be placed on the loading platform 3 in a positioned state by inserting both of the mounting convex portions 8 into both of the through holes 1, When the apparatus main body 4 in the folded state F is placed on the loading platform portion 3 with the other half body 6 facing downwards and the mounting convex portion 8 of the other half body 6 is inserted into the through hole 1 at the rear side, the apparatus main body 4 in the folded state F is positioned on the loading platform portion 3. When the one half body 5 arranged on the positioned apparatus main body 4 in the folded state F is unfolded by the hinge portion 7, the mounting convex portion 8 of the one half body 6 is inserted into the through hole 1 at the front side, and the apparatus main body 4 in the deployed state D during use is configured to be placed on the loading platform portion 3 in a positioned state. It relates to a loading platform space expansion device for a trolley, characterized by the above.
[0009] Further, the mounting convex portion 8 is formed in a shape that can be inserted into the through hole 1 for inserting a handle provided at the front and rear positions of the loading platform portion 3 of the trolley A, and is formed in a convex portion shape that substantially matches the hole shape of the through hole 1 for inserting a handle. By inserting the mounting convex portion 8 into the through hole 1 for inserting a handle, the apparatus main body 4 is configured to be positioned on the loading platform portion 3. It relates to the loading platform space expansion device for a trolley according to claim 1, characterized by the above.
[0010] Further, the mounting convex portion 8 is provided with a locking protrusion portion 9 that protrudes downward from the loading platform portion 3 from the through hole 1 when the mounting convex portion 8 is inserted into the through hole 1 of the loading platform portion 3. The locking protrusion portion 9 is provided with a locking mechanism 10 that can be detachably locked to the lower surface of the loading platform portion 3 when protruding downward from the through hole 1 to the lower surface of the loading platform portion 3. When the locking protrusion portion 9 is locked to the lower surface of the loading platform portion 3 by the locking mechanism 10, the mounting convex portion 8 is in a state of being prevented from coming out of the through hole 1, and the apparatus main body 4 is configured to be placed on the loading platform portion 3 in a positioned state. It relates to the loading platform space expansion device for a trolley according to claim 1, characterized by the above.
[0011] Further, the apparatus main body 4 is provided with a handle portion 11 that can be grasped by hand when in the folded state F on the hinge portion 7, the one half body 5 or the other half body 6. It relates to the loading platform space expansion device for a trolley according to claim 1, characterized by the above.
Advantages of the Invention
[0012] Since the present invention is configured as described above, for an existing cart having a through hole in the loading platform portion, the device body can be easily placed (retrofit) in a positioned state on the upper surface portion of the loading platform portion of the existing cart by a simple operation of inserting the lower mounting convex portion into the through hole with the device body in the deployed state during use. As a result, a large amount of cargo can be loaded on the device body (in the deployed state during use) where the loading space is expanded from the loading platform portion. Moreover, the device body can be in a compact folded state when not in use, etc., while having a shape with an expanded loading space from the loading platform portion. The placement operation of the device body from this folded state onto the loading platform portion is also such that the device body in the folded state is placed on the loading platform portion with one side half body down, and the mounting convex portion of this one side half body is inserted into the front through hole, thereby positioning the device body in the folded state on the loading platform portion. Subsequently, by deploying the other side half body arranged on the positioned device body in the folded state, the mounting convex portion of this other side half body can be easily inserted into the rear through hole and easily positioned and placed, etc., making it an extremely practical loading platform space expansion device for carts.
[0013] Also, in the invention described in claim 2, it becomes an extremely practical loading platform space expansion device for carts that can be easily retrofitted to an existing cart provided with through holes for inserting handles at the front and rear positions of the loading platform portion.
[0014] Also, in the invention described in claim 3, it becomes a more practical loading platform space expansion device for carts in which the mounting convex portion can be in a state of preventing it from coming off with respect to the through hole in the loading platform portion and the device body can be stably placed on the loading platform portion.
[0015] Also, in the invention described in claim 4, it becomes a more practical loading platform space expansion device for carts in which the device body in the folded state can be easily carried by the user grasping the handle portion by hand.
Brief Description of the Drawings
[0016]
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Embodiments for Carrying Out the Invention
[0017] The optimal embodiment of the present invention will be briefly described with reference to the drawings to show the operation of the present invention.
[0018] The loading platform space expansion device for a cart of the present invention is detachably placed (retro-fitted) on the loading platform portion 3 of a cart A provided with a loading platform portion 3 with wheels 2 having at least through holes 1 provided at front and rear positions, and can be used.
[0019] Specifically, the apparatus main body 4 placed on the loading platform portion 3 is configured such that one half 5 and the other half 6 are connected via a hinge portion 7, and when the one half 5 and the other half 6 are arranged flush with each other to form a plate-like shape in the deployed state D during use, the apparatus main body 4 is configured in a shape in which the loading space is expanded to be larger than the upper surface portion that becomes the loading space of the loading platform portion 3.
[0020] In addition, a mounting convex portion 8 for insertion into the front through hole 1 is provided at the lower part of the one-side half body 5, and a mounting convex portion 8 for insertion into the rear through hole 1 is provided at the lower part of the other-side half body 6. The apparatus main body 4 of the present invention can be placed in a positioned state on the loading platform portion 3 by a simple operation of inserting both the mounting convex portions 8 into the front and rear through holes 1 in the use-expanded state D, and a large amount of cargo can be loaded on the apparatus main body 4 in this use-expanded state D where the loading space is expanded from the loading platform portion 3.
[0021] Further, the apparatus main body 4 of the present invention can be switched to a folded state F in which the one-side half body 5 and the other-side half body 6 are folded in two so as to overlap each other by the hinge portion 7, and can be stored or carried in the compact folded state F when not in use or the like.
[0022] Also, when the apparatus main body 4 that was in the folded state F for storage or the like is placed on the loading platform portion 3 with the other-side half body 6 facing down while keeping this folded state F and the mounting convex portion 8 of this other-side half body 6 is inserted into the rear through hole 1, the apparatus main body 4 in this folded state F is positioned on the loading platform portion 3. When the one-side half body 5 arranged above the positioned apparatus main body 4 in the folded state F is unfolded by the hinge portion 7, the mounting convex portion 8 of this one-side half body 5 is inserted into the front through hole 1, and the apparatus main body 4 in the use-expanded state D is placed in a positioned state on the loading platform portion 3.
[0023] Therefore, the apparatus main body 4 in the folded state F can also be placed on the loading platform portion 3 of the trolley A and used in the above simple series of operations.
Embodiment
[0024] Specific embodiments of the present invention will be described with reference to the drawings.
[0025] This embodiment relates to a cart bed space expansion device that can be attached (retrofit) to a cart A equipped with through holes 1 at the front and rear positions of the bed portion 3, and is removably placed and used on the upper surface portion of the bed portion 3.
[0026] First, the cart A adopted in this embodiment will be described. As shown in FIGS. 2 to 5, wheels 2 are vertically provided at the lower four corners of the bed portion 3 formed of a thin plate-like body having a planar direction in the horizontal direction, and further, at the rear end portion of this bed portion 3, an existing push cart A in which a push handle 12 having a horizontal gripping portion at the upper part is erected is adopted.
[0027] Also, the bed portion 3 is formed in a substantially rectangular shape in plan view, with its longitudinal direction set as the front-rear direction (so that a pair of short sides become the front and rear end portions), and the push handle 12 is erected on the upper surface of the bed portion 3 near one short side portion, and the side where the push handle 12 is located is set as the rear end portion of the cart A (the end portion on the rear side in the traveling direction of the cart A). Further, through holes 1 in the shape of elongated holes having a length in a direction orthogonal to the length direction (front-rear direction) of the bed portion 3 in plan view are formed through the front side and the rear side of this bed portion 3 (see FIG. 2). Incidentally, this through hole 1 is a hole for inserting a handle for the operator to insert both hands and grasp when carrying the cart A. That is, in this embodiment, an existing cart A having through holes 1 for inserting handles at the front and rear positions of the bed portion 3 is adopted.
[0028] Next, the cart bed space expansion device of this embodiment will be described. It consists of a plate-shaped device body 4 that can be placed on the bed portion 3. This device body 4 is in a rectangular shape in plan view having a length in the front-rear direction that synchronizes with the bed portion 3, and is configured as a rectangular plate-shaped body having a front-rear width larger than the front-rear width of the bed portion 3 and a left-right width larger than the left-right width of the bed portion 3. That is, this device body 4 is configured in a shape having a load loading space on the upper surface that is much larger than the upper surface portion that becomes the load loading space of the bed portion 3 (see FIGS. 3 and 5).
[0029] More specifically, the main body 4 of the device is formed into a rectangular plate-like body having a length in the front-rear direction by connecting the long side portions of both a rectangular plate-like one-side half body 5 and the other-side half body 6 having a length in the left-right direction in a plan view via a hinge portion 7.
[0030] In addition, the main body 4 of this device can be switched between a use-expanded state D (a state presenting a rectangular shape in a plan view having a length in the front-rear direction) in which the one-side half body 5 and the other-side half body 6 are arranged flush with each other as shown in FIGS. 1, 2, 3, and 5, and a folded state F in which the one-side half body 5 and the other-side half body 6 are folded in two so as to overlap each other by the hinge portion 7 as shown in FIGS. 4 and 6. When not in use, etc., it is configured to be stored or carried in the compact folded state F.
[0031] Further, the one-side half body 5 is composed of a frame body in which a slender frame member made of, for example, metal is assembled in a rectangular shape having a length in the left-right direction, and a single support long bar 19 having a length in the left-right direction and two support short bars 20 having a length in the front-rear direction are assembled in an intersecting state. At least the front and rear longitudinal frame portions 18A of the outer frame 18, the support long bar 19, and the support short bar 20 are formed of plate-like frame members having flat upper surfaces, and the upper surfaces are arranged flush with each other, and each flat upper surface arranged flush with each other functions as an upper surface for loading a load (so that the upper part of the one-side half body 5 becomes a load loading space) (see FIGS. 1 to 3).
[0032] The other-side half body 6 is composed of a frame body that should be said to have the support long bar 19 omitted from the one-side half body 5, and is configured such that the front and rear longitudinal frame portions 18A of the outer frame 18 arranged flush with each other and the flat upper surface portions of the support short bars 20 function as upper surfaces for loading a load (so that the upper part of the other-side half body 6 becomes a load loading space) (see FIGS. 1 to 3).
[0033] Moreover, the description of the "plate-shaped device body" in claim 1 is not used to indicate only something with a long, continuous flat surface (similar in configuration to the loading platform 3 of the trolley A), but is used in the sense of including a device body 4 configured as a frame body with a non-continuous flat surface as in this embodiment, as long as it has a thin and flat shape capable of loading goods.
[0034] Also, one side half 5 and the other side half 6 are formed in a shape where one end of the left and right short-side frame portions 18B of the outer frame 18 extends and protrudes outward, and these left and right extension portions are configured as pivot extension portions 13 that are pivotally attached to the hinge portion 7 in a rotatable manner.
[0035] The hinge portion 7 employs a parallel two-axis hinge structure. Specifically, the hinge portion 7 is configured such that a pair of left and right shaft bases 14 are connected to both ends of a connecting bar 11 having the same length dimension as the support long bar 19, and pivot shafts 15 are provided at two locations on each of these shaft bases 14, with their axial directions parallel to each other and each axial direction coinciding with the length direction of the connecting bar 11. The left and right pivot extension portions 13 of the one side half 5 are pivotally attached to the pivot shaft 15 on one side (front side) of the left and right shaft bases 14 in a rotatable manner, and the left and right pivot extension portions 13 of the other side half 6 are pivotally attached to the pivot shaft 15 on the other side (rear side) of the left and right shaft bases 14 in a rotatable manner (see FIGS. 1 to 3). And through the hinge portion 7 with this parallel two-axis hinge structure, it is configured to be able to be in a folded state F (see FIGS. 4 and 6) where the one side half 5 and the other side half 6 are folded so as to overlap until they are in a state close to being parallel. Moreover, the description of the "folded state where the one side half and the other side half are folded so as to overlap" in claim 1 is not used to mean only a state where the one side half 5 and the other side half 6 are completely overlapped and folded, but is used in the sense of also including a state where the one side half 5 and the other side half 6 are folded in a state where they are somewhat separated (for example, the state in FIG. 4).
[0036] Further, this hinge portion 7 can rotate the one half body 5 upward with respect to the other half body 6 from the horizontal state of the apparatus main body 4 in the deployed state D during use to the folded state F, or can also rotate the other half body 6 upward with respect to the one half body 5 to the folded state F. However, a rotation restricting mechanism (not shown) is provided to restrict the rotation range so that neither the one half body 5 nor the other half body 6 can rotate downward from this horizontal state.
[0037] Further, the connecting bar 11 of this hinge portion 7 is configured to also function as a handle portion 11 that can be grasped by hand and carried when the apparatus main body 4 is in the folded state F (see FIG. 6). That is, in this embodiment, the case where the handle portion 11 is provided on the hinge portion 7 is shown, but this handle portion 11 may be provided on the one half body 5 or may be provided on the other half body 6.
[0038] Here, further explaining the one half body 5, this one half body 5 is set and configured as the front side portion of the apparatus main body 4 (configured so that this one half body 5 is placed on the front side of the loading portion 3). At the left and right corner portions on the front side of this one half body 5 (the opposite side of the left and right pivot extending portions 13), guide rollers 17 are provided in a protruding state forward from these left and right corner portions to achieve smooth traveling when the cart A hits an obstacle such as a wall during traveling and to relieve the impact of the collision. Further, when carrying the apparatus main body 4 in the folded state F, if the handle portion 11 is grasped by hand and the guide roller 12 is grounded, the guide roller 12 is configured to also function as a traveling roller (see FIG. 6).
[0039] Further, the apparatus main body 4 of this embodiment is provided with a mounting convex portion 8 at the lower portion of the one half body 5 for insertion into the through hole 1 in front of the loading portion 3, and a mounting convex portion 8 for insertion into the through hole 1 at the rear of the loading portion 3 is provided at the lower portion of the other half body 6. The apparatus main body 4 in the deployed state D during use is configured to be placed on the loading portion 3 in a positioned and horizontal state by inserting both the mounting convex portions 8 into the through holes 1 at the front and rear (see FIGS. 3 and 5).
[0040] Specifically, a plate member bent into a downwardly convex shape is attached to the lower part of the middle position in the length direction of the rear side long side frame portion 18A of the outer frame 18 of the one-side half body 5, and the downward convex portion of this plate member is configured as the mounting convex portion 8 of the one-side half body 5 (see FIG. 2).
[0041] Further, a plate member bent into a downwardly convex shape is attached to the lower part of the middle position closer to the rear side of the two support short crossbars 20 of the other-side half body 6, and the downward convex portion of this plate member is configured as the mounting convex portion 8 of the other-side half body 6 (see FIG. 2).
[0042] The positions of the mounting convex portion 8 of this one-side half body 5 (front side) and the mounting convex portion 8 of the other-side half body 6 (rear side) are such that when the device main body 4 (the other-side half body 6) is placed on the loading platform portion 3 in a state where the rear end portion is close to or in contact with the hand-pushing handle portion 12 (the handle support portion 21 to which the handle is foldably and rotatably attached) in the deployed state D during use, they are arranged corresponding to the positions of the through holes 1 for inserting the handles in the front and rear of this loading platform portion 3. When the front and rear mounting convex portions 8 are inserted into the through holes 1 for inserting the handles in the front and rear of the loading platform portion 3, the device main body 4 in the deployed state D during use is configured to be placed in a positioned state on the loading platform portion 3 in a state where its rear end portion is close to or in contact with the handle support portion 21 of the hand-pushing handle portion 12. The device main body 4 in this positioned placement state protrudes forward from the front end portion of the loading platform portion 3 and protrudes left and right outward from the left and right end portions of the loading platform portion 3. The loading space of the trolley A is expanded (extended) by this device main body 4 (see FIGS. 3 and 5).
[0043] Further, although the device main body 4 of the present embodiment is configured to be in a positioned state only by inserting each mounting convex portion 8 into the through holes 1 for inserting the handles in the front and rear of the loading platform portion 3, position displacement preventing buffer portions 16 for preventing left-right displacement of the device main body 4 with respect to the loading platform portion 3 are provided at the lower parts of the left and right short side portions of the outer frames of the one-side half body 5 and the other-side half body 6, which are close to or in contact with the left and right side edges of the loading platform portion 3 (see FIG. 2).
[0044] Further, each of the mounting convex portions 8 is formed in a convex shape (rectangular shape in bottom view) having a length substantially matching the hole shape of the long hole-shaped through hole 1. When the mounting convex portion 8 is inserted into the through hole 1, the apparatus main body 4 is configured such that it is hardly displaced in the front-rear and left-right directions with respect to the loading platform portion 3 and is positioned in a state where the apparatus main body 4 is prevented from rotating in the horizontal direction with the mounting convex portion 8 as a fulcrum.
[0045] Therefore, even if only the mounting convex portion 8 of the other half body 6 is inserted into the rear through hole 1 while placing the apparatus main body 4 in the folded state F on the loading platform portion 3 with the other half body 6 facing down as shown in FIG. 4 (even when the apparatus main body 4 is placed on the loading platform portion 3 in the folded state F without being unfolded), the apparatus main body 4 in the folded state F can be positioned on the loading platform portion 3. Subsequently, when the one half body 5 arranged on the positioned apparatus main body 4 in the folded state F is activated and rotated by the hinge portion 7 until it becomes horizontal (until it is flush with the one half body 5) and unfolded, the mounting convex portion 8 of the one half body 5 is inserted into the front through hole 1, and the apparatus main body 4 in the deployed state D during use is configured to be placed on the loading platform portion 3 in a positioned state (see FIG. 5).
[0046] In addition, the mounting convex portion 8 of the present embodiment is provided with a locking protrusion 9 that protrudes downward from the loading platform portion 3 from the through hole 1 when the mounting convex portion 8 is inserted into the through hole 1 of the loading platform portion 3. The locking protrusion 9 is provided with a locking mechanism 10 that can be detachably locked to the lower surface of the loading platform portion 3 when it protrudes downward from the through hole 1 to the lower surface of the loading platform portion 3. When the locking protrusion 9 is locked to the lower surface of the loading platform portion 3 by the locking mechanism 10, the mounting convex portion 8 is configured to be in a state of being prevented from coming out of the through hole 1, and the apparatus main body 4 is placed on the loading platform portion 3 in a positioned state.
[0047] Specifically, in this embodiment, the locking protrusion 9 is provided on the mounting convex portion 8 of the one-side half body 5, and this locking protrusion 9 is provided with the locking mechanism 10. It should be noted that the locking protrusion 9 may be provided on the mounting convex portions 8 of both the one-side half body 5 and the other-side half body 6.
[0048] Further, this locking protrusion 9 is composed of a plate material bent and formed in a U shape as shown in FIG. 2. The middle plate portion of this U-shaped plate-like locking protrusion 9 is formed to have substantially the same shape (rectangular shape) as the lower end surface of the mounting convex portion 8. The middle plate portion of this locking protrusion 9 is overlapped with the lower end surface of the mounting convex portion 8 (with both end plate portions facing downward), and this middle plate portion is attached to the lower end surface of the mounting convex portion 8.
[0049] Also, in the locking mechanism 10, the middle plate portion of the locking protrusion 9 is pivotally attached to the lower end surface of the mounting convex portion 8 so as to be horizontally rotatable. The locking protrusion 9 is provided such that the user can pinch both end plate portions thereof and perform a horizontal rotation operation with respect to the mounting convex portion 8. When the locking protrusion 9 is rotated so that its length direction is aligned with the length direction of the mounting convex portion 8 (to be in the state of FIG. 2), both the locking protrusion 9 and the mounting convex portion 8 can be inserted into and removed from the through hole 1 for inserting the handle. After inserting the locking protrusion 9 and the mounting convex portion 8 into the through hole 1, when the locking protrusion 9 protruding below the loading platform portion 3 from the through hole 1 is rotated 90 degrees in the horizontal direction so that the length direction of the locking protrusion 9 and the length direction of the mounting convex portion 8 are in an orthogonal state (to be in the states of FIGS. 1, 3, and 5), the upper surface of the middle plate portion of this locking protrusion 9 is configured to be close to or in contact with and locked to the lower surface of the loading platform portion 3 around the through hole 1 for inserting the handle, so that the mounting convex portion 8 is in a state of being prevented from coming out upward.
[0050] It should be noted that the present invention is not limited to this embodiment, and the specific configurations of each component can be designed as appropriate.
Explanation of Reference Numerals
[0051] 1 Through hole 2 Wheel 3 Loading platform part 4 Apparatus main body 5 One-side half body 6 The other-side half body 7 Hinge part 8 Mounting convex part 9 Locking protrusion 10 Locking mechanism 11 Handle part A Cart D Deployment state during use F Folded state
Claims
1. A loading platform space expansion device for a trolley equipped with a loading platform part with wheels, at least through holes being provided at front and rear positions, the device being removably placed on the upper surface part of the loading platform part, The plate-shaped device body placed on the loading platform part has one-side half and the other-side half connected via a hinge part, and is configured to be switchable between a use-time deployment state in which the one-side half and the other-side half are arranged flush with each other and a folded state in which the one-side half and the other-side half are folded in two so as to overlap with each other by the hinge part, The device body in the use-time deployment state is configured in a shape in which the loading space is expanded larger than the upper surface part that becomes the loading space of the loading platform part, This device body is provided with mounting convex parts to be inserted into the front through hole at the lower part of the one-side half, and mounting convex parts to be inserted into the rear through hole are provided at the lower part of the other-side half, and the device body in the use-time deployment state is configured to be placed in a positioned state on the loading platform part by inserting both mounting convex parts into both through holes, When the device body in the folded state is placed on the loading platform part with the other-side half down and the mounting convex part of this other-side half is inserted into the rear through hole, the device body in the folded state is positioned on the loading platform part, and when the one-side half arranged on the positioned device body in the folded state is deployed by the hinge part, the mounting convex part of this one-side half is inserted into the front through hole, and the device body in the use-time deployment state is configured to be placed in a positioned state on the loading platform part. A loading platform space expansion device for a trolley, characterized in that.
2. The mounting convex part is formed in a shape that can be inserted into the through hole for inserting a handle provided at the front and rear positions of the loading platform part of the trolley, and is formed in a convex part shape that substantially matches the hole shape of the through hole for inserting a handle, and the device body is configured to be positioned on the loading platform part by inserting the mounting convex part into the through hole for inserting a handle. The loading platform space expansion device for a trolley according to claim 1, characterized in that.
3. The mounting convex portion is provided with a locking protrusion that protrudes downward from the loading platform portion through the through hole when the mounting convex portion is inserted into the through hole of the loading platform portion. The locking protrusion is provided with a locking mechanism that can be detachably locked to the lower surface of the loading platform portion when it protrudes downward from the through hole of the loading platform portion. When the locking protrusion is locked to the lower surface of the loading platform portion by this locking mechanism, the mounting convex portion is in a state of being prevented from coming out of the through hole, and the apparatus main body is configured to be placed on the loading platform portion in a positioned state. The loading platform space expansion device for a trolley according to claim 1, characterized in that.
4. The apparatus main body is provided with a handle portion that can be grasped by hand when in the folded state on the hinge portion, the one side half body, or the other side half body. The loading platform space expansion device for a trolley according to claim 1, characterized in that.
Citation Information
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