JP2015147558A - Truck structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide truck structure enabling three kinds of methods of stacking trucks to be used.SOLUTION: There is provided the truck structure in which support shafts of casters are fixed to four corners of one bottom face of a truck body. The truck structure comprises: a pair of first holes 5 in which wheels 3 of casters 2 can fit respectively, the casters 2 being provided in an upper truck when trucks are stacked and being arranged in a short direction of the upper truck; four second holes 7 in which the wheels 3 of the caster 3 of the upper truck can fit with the wheels 3 arranged in the short direction of the truck body; a lattice part 10 comprised of a center lattice part 11 and an outside lattice part inside the truck body; a lattice formation wall which forms the center lattice part and outside lattice part and extends below the other bottom surface of the truck body, and which has a lower end surface formed horizontal; and latching pieces 17 which are provided in the lattice formation wall, extend more downward than the lattice formation wall, and which have lower ends disposed above ground-contact surfaces of the casters 3. The trucks therefore can be stacked by three kinds of stacking methods.

Description

  The present invention relates to a stackable cart structure that can use three types of stacking methods.

  In the transport cart disclosed in Japanese Patent Application Laid-Open No. 2004-352132, casters are attached to the four back corners of the cart body, and the casters are located near the caster and along one opposite side of the cart body. A hole into which the caster can be inserted is formed in the cart body located near the center, and when the transport cart is stacked, the caster located on one side of the transport cart located above is The caster located on the other side of the transport cart located above is inserted into the hole located on one side of the transport cart located on the other side of the transport cart located below. It is configured so that the cart body of the transport cart positioned above is placed on the cart body of the transport cart positioned below, and is formed at the center of the cart body Opening The partition chamber is formed by the ribs that intersect with each other, and a fitting member that protrudes downward from the lower surface of the cart body is provided in the compartment chamber that is located in the center of one side of the cart body. When the transport carts are stacked, the fitting member formed on the transport cart positioned above is placed in a predetermined compartment formed in the cart main body of the transport cart positioned below. A configuration adapted to be fitted is disclosed.

Further, in the cross-stacking method and cart of Japanese Unexamined Patent Application Publication No. 2010-137586, the top surface of the cart body of the cart is formed in a flat plate shape having no protrusions that prevent the load from falling, and the cart body Is formed with an engaging projection that protrudes downward from the back surface of the cart body along the short side of the cart body, and the cart body projects downward from the back surface of the cart body. In addition, a pedestal member that does not extend downward beyond the engaging protrusion is formed along the long side portion of the bogie main body, and still further, a hand-held through hole is formed on the long side of the bogie main body. The trolley caster at an odd number position is formed with respect to the first-stage carriage located at the lowermost position, with respect to the first-stage carriage located at the bottom. The bogie body of the bogie in the odd position directly below, through the bogie in the even position When the trolley at the odd-numbered position and the trolley at the even-numbered position are cross-stacked so as to be placed, the pedestal member formed on the back surface of the trolley body of the second-stage trolley It is configured to be mounted on the upper surface of the mounting plate of the bogie body of the first stage bogie located below, and when the bogies are cross-stacked, the bogies at even positions A cross is formed so that a gap is formed between the upper surface of the main body and the lower end of the base member formed on the back surface of the main body of the cart at the odd-numbered position, which is located immediately above the cart at the even-numbered position. The engaging protrusions formed on the bogie body of the bogie located immediately above the bogie located below are fitted into the hand-held through holes formed in the bogie body of the bogie located below. The structure made to do is disclosed.
However, in the said structure, the stacking method of a trolley | bogie is restricted to one, and a different stacking cannot be used according to the working condition of a field, and there exists a problem that a versatility is scarce.

JP 2004-352132 A JP 2010-137586 A

  The problems to be solved by the present invention are a method of stacking the carts in parallel and directly above, a method of stacking the carts alternately in the longitudinal direction of the carts, and stacking the carts in parallel in the longitudinal direction and the lateral direction of the carts. It is intended to provide a cart structure that can perform any of the methods of crossing and parallel stacking.

In order to achieve the above object, the present invention provides a first aspect of the present invention.
In the cart structure capable of stacking in which the pivot shaft of the swivel caster is fixed to the four corners of the bottom of the cart body that is rectangular in plan view
On a line connecting a pair of support shafts provided in the longitudinal direction of the carriage main body, a pair of first hole portions that can be fitted with wheels of casters arranged in the short direction of the upper carriage when stacked are provided,
A total of four second holes that can be fitted in a state in which the wheels of the casters of the upper cart including the positions corresponding to the respective support shafts are arranged in the lateral direction of the cart body,
A central lattice portion disposed near the center in the longitudinal direction of the bogie main body and an outer lattice portion disposed near the outside in the longitudinal direction on the inner side of the cart body surrounded by the first hole portion and the second hole portion; A lattice part consisting of
A lattice forming wall that forms at least a part of the central lattice portion and the outer lattice portion of the lattice portion extends below the other bottom surface of the carriage body to form a lower end surface horizontally, and the lattice forming wall A locking piece extending downward from the grid forming wall and having a lower end disposed above the grounding surface of the caster is provided.
When the trolleys are stacked in parallel directly above, the wheels of the upper trolley casters are respectively fitted and positioned in the second holes of the lower trolley,
When the carriages are alternately shifted in the longitudinal direction of the carriage and stacked in parallel, the pair of caster wheels arranged in the short direction of the upper carriage are arranged in front of the lower carriage in the longitudinal direction. Is fitted to the upper portion, and the lattice forming wall of the upper carriage is placed on the upper surface of the lower carriage so as to support the upper carriage in parallel, and the locking piece is placed in the space of the central lattice section of the lower carriage or the second Fit and position in the hole,
When the carts are stacked in parallel with the longitudinal direction and the short direction of the carts alternately intersecting, the locking pieces of the upper cart are fitted and positioned in the first hole of the lower cart. Features.

In the cart structure of the present invention, when the carts are stacked in parallel directly above, the wheels of the upper casters of the upper cart are hooked and positioned in the second hole portion of the lower cart and stacked.
When the carriages are alternately shifted in the longitudinal direction of the carriage and stacked in parallel, the wheels of the pair of swivel casters of the upper carriage are hooked in the first hole of the lower carriage and the lattice forming wall of the upper carriage is The bottom portion is placed on the upper surface of the lower carriage and supported in parallel. At the same time, the upper carriage locking pieces are locked and positioned in the lower carriage grid or second hole to be stacked.
When the carts are stacked in parallel by alternately intersecting the longitudinal direction and the short direction of the cart, the locking pieces of the upper cart can be hung on the first hole of the lower cart and positioned and stacked. .
Moreover, by providing the connection pins on the upper surfaces of the four corners of the cart body, the cart bodies can be connected in series or in parallel.

It is a top view of a trolley. It is a bottom view of a trolley. It is a perspective view from the plane side of a trolley. It is a perspective view from the bottom face side of a trolley. It is explanatory drawing seen from the plane which shows the latching state shifted and accumulated in the longitudinal direction. It is the same side view. It is explanatory drawing seen from the plane which shows the latching state which crossed and piled up a short side and a long side alternately. It is the same front view. It is the same side view. It is a perspective view of the state where the cart was piled up right above. (A) is the same side view, (b) is a principal part enlarged view which shows the wheel standby state of a 2nd hole part, (c) is a principal part enlarged view at the time of wheel accommodation. It is a perspective view explaining the state connected in series in a longitudinal direction. It is the principal part expanded sectional view. It is a top view which shows the state connected in parallel with a transversal direction. It is the principal part enlarged plan view. It is explanatory drawing seen from the plane which shows a latching position in each stacking method of the locking piece in a trolley | bogie main body. (A) is AA sectional drawing of FIG. 16, (b) is the BB sectional drawing.

  The present invention is provided with a first hole portion and a second hole portion in a cart body, the lower end of the lattice forming wall of at least a part of the lattice portion is extended downward from the lower end of the cart body, and the lower end is leveled and locked. By stacking the pieces further downward, when stacking the carts in the vertical direction, the carts are stacked directly above, stacked alternately in the longitudinal direction, or stacked by alternately intersecting the vertical and horizontal directions of the cart Realized the method.

[Car body]
A preferred embodiment of a stackable cart structure according to the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 4, the cart 20 has a structure in which the support shafts P of the swivel casters 2 are fixed to the four corners of the bottom of the cart body 1 having a rectangular shape in plan view.
The support shaft P is eccentric from the center of the wheel 3 and is provided at the turning center position of the support yoke 4 that supports the wheel.

In the illustrated example, the position of the support shaft P is a position where the tip of the wheel 3 is substantially within the outer peripheral edge of the carriage body 1 even if the wheel 3 turns around the support shaft P. 4 are shown in FIG. 1 for convenience of explanation.
The cart body 1 has a first hole portion 5, a second hole portion 7, a lattice portion 10, and a locking piece 17 as a stacking structure.

[First hole]
The first hole 5 is a wheel of the caster 2 on a line L1 (see FIG. 1) connecting a pair of support shafts P, P provided in the longitudinal direction of the carriage body 1 (hereinafter simply referred to as the longitudinal direction). 3 includes a pair of through holes into which 3 can be fitted.
In the present embodiment, the first hole portion 5 is formed of a substantially rectangular hole. As shown in FIGS. 5 and 6, when the carts 1 are alternately stacked in the longitudinal direction and stacked, The wheel 20 'in the longitudinal direction (hereinafter simply referred to as "upper") is placed on the lower body (hereinafter simply referred to as "lower") of the cart body 1 in the longitudinal direction. When the wheel 3 on the other side of the direction is shifted and stacked so as to be on the outer side away from the lower cart body 1, the wheel 3 ′ on the one side is fitted.

  Since the first hole 5 is fitted with only a pair of wheels 3 ′ on the tip side of the carriage 20 ′ placed above, the first hole 5 is provided in a pair on the carriage body 1. Since stacking is alternately shifted to one side or the other side in the longitudinal direction, it is preferable to arrange a total of four so as to be symmetric with respect to the center in the longitudinal direction because they can be fitted into any of the first holes 5. .

[Second hole]
As shown in FIGS. 10 and 11 (a), the second hole 7 fits the wheel 3 'of the upper carriage 20' when the upper carriage 20 'is stacked in parallel with the carriage 20 in parallel. It is a recessed part for.
The second hole 7 includes a position corresponding to each of the support shafts P, and is formed of a substantially rectangular recess for fitting the wheel 3 ′ of the caster 20 ′ of the upper carriage 20 ′. A total of four are formed along the line.
The second hole portion 7 is arranged in parallel along the short side of the cart body 1 and along the short direction (hereinafter referred to as “short direction”) of the upper cart body 20 ′. It consists of a substantially rectangular recess formed at a position where it can be fitted in a state of being arranged in parallel.

Since the second hole portion 7 is formed at a position where the four wheels 3 of the upper cart body 1 can be fitted in a state of being pivoted substantially parallel to the side in the short direction, It is arranged at a position biased to one side in the short direction.
Further, in this embodiment, when the wheel 3 ′ is inserted into the second hole 7 at the bottom of the second hole 7, the wheel 3 ′ operates in the closing direction due to the weight of the wheel, and both sides of the recess are formed on the side surface of the wheel 3 ′. The restraint piece 31 which latches from is provided.

  An example of the restraining piece 31 is composed of a piece having a substantially L-shaped cross section including a placing piece portion 31a that abuts on the tread surface of the wheel 3 and a restraining piece 31b that is hooked on the side surface of the wheel 3. The end is pivotally attached to the peripheral wall of the second hole 7, the restraining piece 31 b is immersed in the peripheral wall, and the mounting piece 31 a is illustrated in a standby position that protrudes obliquely on the bottom wall of the second hole 7. It is energized by the energizing means that does not (see FIG. 11B).

When the wheel 3 is fitted into the second hole 7, the mounting piece 31 a is pushed down by the tread surface of the wheel 3, the restraining piece 31 b protrudes from the peripheral wall, and enters the recess on the side surface of the wheel 3. (See FIG. 11C).
When the wheel 3 is pulled up from the second hole 7, the restraining piece 31b is pushed back into the peripheral wall, and the placing piece 31 is returned to the standby position by the urging means.
As a result, the position of the wheel 3 ′ is regulated not only by fitting into the second hole 7 but also by locking by the restraining piece 31, so that the upper carriage 20 ′ can be accurately positioned. it can.

Further, the length of the concave portion of the second hole 7 in the longitudinal direction is such that a locking piece 17 ′ described later can be fitted (see FIG. 5).
And in the example of illustration, a pair of 2nd hole part 7 along a longitudinal direction is set to the position containing the extension line L2 (refer FIG. 1) along the longitudinal direction of the below-mentioned locking piece 17 in any one side. Therefore, at least one of the locking pieces 17 ′ of the upper cart body 1 ′ can be fitted and positioned.

[Lattice part]
The lattice portion 10 is formed from a plurality of frames formed by intersecting a vertical frame and a horizontal frame, and through holes surrounded by the frames, and the first hole portion 5 and the second hole portion 7 It is arranged in the inner region of the enclosed cart body 1.

In the present embodiment, the lattice portion 10 is formed longer than the central lattice portion 11, which is connected to the central lattice portion 11 and disposed closer to the outer side in the longitudinal direction. And an outer lattice portion 12.
In the illustrated example, the central lattice portion 11 and the outer lattice portion 12 are provided as a pair with respect to the center in the longitudinal direction.

The grid portions 10 are arranged in six rows in the longitudinal direction, and two central grid portions 11 and two outer grid portions 12 are arranged symmetrically in each row.
In addition, two end lattice portions 13 having a short length are arranged outside the outer lattice portion 12.

Furthermore, in this embodiment, a pair of central lattice portions 11 ′ are formed between the first hole portions 5 outside the six rows of lattice portions 10.
An extension hole 14 is formed outside the end lattice portion 13 at a position aligned with the second hole portion 7.

  In the illustrated example, the second hole portion 7 is arranged at a position where the wheel 3 is fitted in a state of being turned in the same direction so as to be parallel to the side in the short direction, and therefore the second hole portion 7 is located with respect to the center of the cart body 1. On the other hand, in FIG. 1 and FIG.

  Therefore, in FIG. 5, the second hole portion on the side adjacent to the upper longitudinal side in the drawing (for convenience of explanation, it is set as 7b in FIG. 5) is separated from the central lattice portion 10 and the lower portion in the drawing. The second hole on the side adjacent to the side in the longitudinal direction (also referred to as 7a in FIG. 5) is disposed so as to approach the lattice portion 10 and partially enter.

In addition, the extension hole 14 is formed at a position symmetrical with the upper portion of the second hole portion 7a in the lower part of the drawing.
The extension hole 14 is arranged on the extension line of the upper locking piece 17 at the upper side in FIG. 5, and the second hole portion 7a adjacent to the lower side in the figure is the lower locking piece in the figure. It is arranged on 17 extension lines (line L2 in FIG. 1).

[Locking piece]
And in the through-hole of the outer side grid | lattice part 12, the latching piece 17 which has a plate shape and is arrange | positioned along the longitudinal direction in the intermediate position is being fixed.
In the present embodiment, the central lattice portion 11 and the outer lattice portion 12 that are continuous along the longitudinal direction of the lattice portion 10 are formed at both ends of the lattice portion 10 in the short direction (upper and lower both ends in the drawing). A lattice forming wall 16 extending in the longitudinal direction is formed (see FIGS. 17A and 17B).

The lattice forming wall 16 is composed of a pair of side walls, and extends downward from the other bottom surface of the carriage body 1 to form a lower end surface on a horizontal plane.
A locking piece 17 extending downward from the grid forming wall 16 and having a lower end disposed above the ground contact surface of the wheel 3 is fixed at an intermediate position between the pair of grid forming walls 16.

  The lattice-forming wall 16 is arranged so that the upper carriage body 1 'is parallel to the lower carriage body 1 when the carriages are stacked while being shifted alternately in the longitudinal direction and when the carriages are alternately stacked vertically and horizontally. In order to make it mount, the lower end becomes a horizontal surface (refer FIG. 6, FIG. 8-9).

Further, when the upper and lower carts 20 ′ are stacked with the cart body alternately shifted in the longitudinal direction, the locking pieces 17 ′ on the distal end side of the central lattice portion 11 are stacked as shown in FIG. 5. The locking piece 17 ″ on the rear end side is fitted in the hole of the frame, and one of the locking pieces 17 ″ is fitted in the extension hole 14 and the other is fitted in the second hole portion 7, thereby positioning the upper cart body 1 ′. Is done.
In the illustrated example, since the gripping holes 9 are provided at both ends in the longitudinal direction, the lattice portion 10 cannot be formed. However, when the gripping holes 9 are reduced or not formed, the end lattice portions are replaced with the extension holes 14. 13 may be increased.

Next, when stacking the truck main body alternately in vertical and horizontal directions, as shown in FIG. 7, the four locking pieces 17 ′ and 17 ′ of the upper carriage 20 ′ are the four first pieces of the lower carriage 20. One hole is fitted into each of the holes 5.
The fitting position is located on the edge side closer to the center of the carriage main body 1 at each first hole 5, and positioning is performed by restraining the upper carriage 20 ′ at a predetermined position.

[Connecting means]
Next, in the cart of the present embodiment, a coupling means comprising coupling pins 21 and receiving holes 30 at the four corners of the cart body 1 in order to connect a plurality of carts in the longitudinal direction or the short direction on the ground plane. Is provided.
In this embodiment, as shown in FIG. 13, the connecting pin 21 includes a base shaft 22, a bending shaft portion 23 that bends at a substantially right angle at the upper end of the base shaft 22, and a distal end of the bending shaft portion 23 parallel to the base shaft 22. It consists of a substantially U-shaped pin comprising a locking shaft portion 24 that is bent into a bent shape.

The base shaft 22 is inserted through a through-hole 26 in a corner portion and protrudes downward from the bottom portion of the cart body 1. A stopper stopper 25 is fixed to the protruding end of the base shaft 22, and penetrates the stopper 25. A coil spring S is interposed between the bottom surface of the hole 26 and the connecting pin 21 is urged in the immersion direction.
The receiving hole 30 to be hooked when not in use is arranged side by side with the through hole 26. As is clear from FIG. 15, the first receiving hole 31 for receiving the locking shaft portion 24 when the connecting pin 21 is not used. A second receiving hole 32 that is arranged on the outside along with the through hole 26 and is used for connection, and a third receiving hole 33 that is arranged at a position spaced apart along with the second receiving hole 32 are formed. .

The second receiving hole 32 and the third receiving hole 33 are connected to the carriage 20 connected in series in the longitudinal direction so that the locking shaft portion 24 at the tip of the connecting pin 21 can be received on either side of the continuous carriage. The holes 32 and 33 are inserted and connected (see FIG. 12).
That is, the connecting pin 21 pulls the base shaft 22 upward against the urging force of the spring S, extracts the locking shaft portion 24 from the first receiving hole 31, rotates it around the base shaft 22, and connects the connecting shaft 21. This is performed by inserting into the second or third receiving holes 32 and 33 (see FIG. 12).
In the illustrated example, the case where the carts 20 having the same shape are connected is illustrated, but even carts having different shapes can be connected in the same manner as long as the carts have similar receiving holes.

Next, when the cart body 1 is connected in parallel with the sides in the short direction, the connecting pin 15 is not used as shown in FIG.
That is, as shown in FIGS. 3 to 4 and FIG. 17 (b), the bogie main body 1 has one side in the longitudinal direction as a lower projecting piece portion 25 having a lower half of the thickness of the bogie main body 1. The other side is an upper projecting piece 27 that is the upper half of the thickness of the cart body 1.
The lower projecting piece 25 is provided with one or a plurality (two in the illustrated example) of connecting through holes 26 penetrating vertically.

On the other hand, a pair of hanging fitting portions 28 that can be fitted into the connecting through-holes 26 are provided on the upper projecting piece portion 27 at positions that are aligned at the time of connection.
Therefore, when connecting the cart body 1 in parallel, the upper projecting piece 27 of one cart body 1 overlaps the lower projecting piece 25 of the other cart body 1 and the upper projecting piece 27 is suspended. The fitting is performed by fitting the fitting portion 28 into the connecting through hole 26 of the lower projecting piece 25.

Further, even in the case of the cart body 1 ″ having a different shape, as shown in FIG. 15, if the same type of receiving holes 32 ′ and 33 ′ are formed in the corner portion, both in the series direction and in the parallel direction. The cart can be coupled using the coupling pin 15.
The present invention is not limited to the above-described configuration, and it goes without saying that various design changes can be made without changing the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Bogie body 2 Turning caster 3 Wheel 4 Support yoke 5 1st hole 7 2nd hole 9 Grasp hole 10 Lattice part 11 Central lattice part 12 Outer lattice part 13 End lattice part 14 Extension hole 16 Lattice formation wall 17 Locking Piece 20 bogie P spindle

Claims (1)

In the cart structure capable of stacking in which the pivot shaft of the swivel caster is fixed to the four corners of the bottom of the cart body that is rectangular in plan view
On a line connecting a pair of support shafts provided in the longitudinal direction of the carriage main body, a pair of first hole portions that can be fitted with wheels of casters arranged in the short direction of the upper carriage when stacked are provided,
A total of four second holes that can be fitted in a state in which the wheels of the casters of the upper cart including the positions corresponding to the respective support shafts are arranged in the lateral direction of the cart body,
A central lattice portion disposed near the center in the longitudinal direction of the bogie main body and an outer lattice portion disposed near the outside in the longitudinal direction on the inner side of the cart body surrounded by the first hole portion and the second hole portion; A lattice part consisting of
A lattice forming wall that forms at least a part of the central lattice portion and the outer lattice portion of the lattice portion extends below the other bottom surface of the carriage body to form a lower end surface horizontally, and the lattice forming wall A locking piece extending downward from the grid forming wall and having a lower end disposed above the grounding surface of the caster is provided.
When the trolleys are stacked in parallel directly above, the wheels of the upper trolley casters are respectively fitted and positioned in the second holes of the lower trolley,
When the carriages are alternately shifted in the longitudinal direction of the carriage and stacked in parallel, the pair of caster wheels arranged in the short direction of the upper carriage are arranged in front of the lower carriage in the longitudinal direction. Is fitted to the upper portion, and the lattice forming wall of the upper carriage is placed on the upper surface of the lower carriage so as to support the upper carriage in parallel, and the locking piece is placed in the space of the central lattice section of the lower carriage or the second Fit and position in the hole,
When the carts are stacked vertically parallel with the longitudinal direction and the transverse direction of the carts alternately intersecting, the locking pieces of the upper carts are fitted and positioned in the first holes of the lower carts. Bogie structure characterized by

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