JP2017081473A - Transport cart using alignment cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transport cart using an alignment cover in which a fixed wheel (fixed wheel middle abdomen) is covered by an alignment cover, and therefore a caster of the other transport cart is prevented from coming into abutment with the fixed wheel, and the nesting and unlocking work is stably made.SOLUTION: A transport cart has free casters 10 installed at four corners in the lower surface of a floor frame 1. A fixed caster 20 without swivel action is fixed in an intermediate position of a front traveling direction 46 in a lower surface. The fixed caster 20 is configured such that an axle 26 of a fixed wheel 25 is axially stopped to axial plate members 21, 21, and a V-shaped abutment member 22 is fixed in an aperture of the longitudinal direction of the axial plate members 21, 21. The axial plate member 21 and the abutment member 22 constitute an alignment cover 24. The bottom edge 22a of the abutment member 22 and the bottom edge 21a of the axial plate member 21 are positioned more downward than a "fixed wheel middle abdomen 29" (H<H), and the bottom edge 22a of the abutment member 22 is positioned more downward than a "caster middle abdomen 17" of a caster 12 (H<H).SELECTED DRAWING: Figure 2

Description

  The present invention relates to a transporting carriage using an alignment cover for casters that acts mainly during storage.

  In the transport cart, during storage that is not used for transporting luggage, a plurality of carts are overlapped in plan view, referred to as nesting, and the storage space is reduced (Patent Document 1, FIG. 4, Patent Document 2). In this case, the caster frame that supports the wheels of the fixed caster and the free caster only occupies about 60 ° of the upper end of the entire 360 ° circumference of the wheel. The degree was exposed.

  When nesting a transport cart, if another transport cart is moved and stacked on the free wheel of a stationary transport cart, In some cases, the wheels of the fixed casters of the transportation cart contact. At this time, the wheels of the free casters that were stationary became an obstacle, and the progress of other transport carts that were brought close to each other was hindered.

Japanese Patent Laid-Open No. 2002-19614 JP2013-233881A JP 2008-213504 A JP 2014-218183 A

  In order to avoid such a wheel contact, it is conceivable to provide a cover on the wheel. Generally, as an example of providing a cover on the carriage, a rectangular tube case (rectangular in plan view) is used to store the brake device. ) In which the portion excluding the lower end of the wheel is covered (Patent Document 3, FIG. 7, FIG. 8), and the portion excluding the lower end of the wheel of the driving wheel at the center in the electric traveling carriage ( Patent Document 4) has been proposed. Although there is no mention of the effect of the former case, it is considered to protect the brake device, and the latter cover is considered to take safety into consideration when a person touches the driving wheel. Furthermore, these examples are carts having a structure that cannot be nested, and in order to protect the wheels, they have a rectangular shape in plan view as in the plan view of the cart.

  Therefore, even if the case and cover of Patent Documents 3 and 4 can be applied to a fixed wheel of a cart capable of nesting, the corner of the case or cover hits the wheel 12 of the free caster 10 (FIG. 1 ( a)) The above problems could not be solved.

  The present invention solves the above-mentioned problems because the cart has a free caster and a fixed caster, and is a nestable cart, and the fixed caster is provided with an alignment cover having an oblique contact surface.

That is, the present invention is a transport cart characterized in that casters are attached to the lower surface side of a floor frame that supports a pallet on which a load is placed, and is configured as follows.
(1) The transport cart is a plurality of transport carts, and is formed so as to be able to be nested by overlapping a floor frame in a plan view,
And the fixed caster which has a fixed wheel was attached.
(2) A universal caster having a universal wheel is attached to the floor frame on one side or both sides of the fixed caster in the traveling direction of the transport carriage.
(3) An alignment cover covering the outer periphery of the fixed caster was attached.
(4) The alignment cover is in a state in which one transportation cart and the other transportation cart are nested,
It was formed in such a structure that the fixed wheel of one transporting carriage and the free wheel of the other transporting truck do not contact each other.
(5) The alignment cover has a contact surface that is inclined in the traveling direction on one or both of the front side and the rear side in the traveling direction.

In another aspect of the invention, there is provided a transportation cart characterized in that a caster is attached to the lower surface side of a floor frame that supports a pallet on which a load is placed, and is configured as follows.
(1) The transporting carriage has a structure capable of nesting by overlapping a plurality of transporting carriages in a plan view.
And the fixed caster which has a fixed wheel is provided.
(2) A free caster having a free wheel is arranged on one side or both sides of the fixed caster in the traveling direction of the transporting carriage.
(3) The fixed caster was provided with an alignment cover covering the outer periphery of the fixed wheel.
(4) With the fixed wheel and the universal wheel in contact with the ground surface,
The point where the diameter parallel to the ground contact surface of the free wheel is located on the outer periphery of the free wheel is referred to as the “free wheel middle abdomen”,
The point where the diameter parallel to the ground contact surface of the fixed wheel is located on the outer periphery of the fixed wheel is the "fixed wheel middle part",
(5) The alignment cover is disposed on the side of the free wheel from at least the middle part of the fixed wheel of the fixed wheel,
And the lower end of the alignment cover was located below the middle part of the universal wheel.
(6) The alignment cover has a contact surface that is inclined in the traveling direction on one or both of the front side and the rear side in the traveling direction.

  In this invention, the fixed wheel or the middle part of the fixed wheel of the fixed wheel is covered with the alignment cover having the contact surface (contact member) formed obliquely with respect to the traveling direction. , It does not directly contact the free wheel of the other carriage. Therefore, when nesting the transport carriage, the nesting and nesting can be stably performed without unintentionally preventing the travel of the transport carriage.

It is the conceptual diagram which represented this invention by planar view, (a) is a prior art example, (b) represents this invention. (A) is a plan view of the free wheel, (b) is a plan view of the fixed wheel, and (c) is a front view of the fixed wheel (partially broken) and the free wheel. Represents. A side view is shown with the fixed wheel used for this invention. The top view is represented by the other fixed wheel used for this invention. The pallet is in a state of chain lines in the transport carriage of the present invention, (a) is a plan view, (b) is a front view, and (c) is a bottom view. It is a top view showing the state which has carried out the nesting of the trolley | bogie of this invention, (a) represents the state in nesting, (b) represents the state which nesting was completed. It is a bottom view showing the state where the trolley | bogie of this invention is nesting, (a) represents the state during nesting, (b) represents the state which nesting was completed.

  Embodiments of the present invention will be described with reference to the drawings.

1. Configuration of the carriage 40

(1) In the plan view, the wide side ends of the main floor frame members 2 and 2 arranged in a “C” shape are connected and fixed with the long connecting material 3, and the narrow side ends with the short connecting material 4. The floor frame 1 is configured by connecting and fixing. Here, the length direction of the floor frame 1, that is, the direction indicated by the arrow 46 connecting the end portion on the wide side and the end portion on the narrow side is referred to as the “front running direction” (FIGS. 2, 5 to 7). .
Caster mounting plates 7 and 7 are fixed to the lower surfaces of the end portions on the wide side of the main floor frame materials 2 and 2, respectively. In addition, the caster mounting plates 8 and 8 are fixed at the narrow end portions of the main floor frame materials 2 and 2 across the lower surface of the short connecting material 4 (FIG. 1A). Therefore, the caster mounting plates 7 and 8 are arranged at the four corners of the floor frame 1.

(2) A swivelable caster 10 (usually on the front side in the traveling direction 46) is attached to the lower surface of the caster mounting plates 8 and 8 of the floor frame 1, respectively. Further, a swivelable caster 10a (usually on the rear side in the traveling direction 46) is attached to the lower surfaces of the caster mounting plates 7 and 7 of the floor frame 1, respectively. The universal caster 10 and the universal caster 10a usually have the same structure. In the universal casters 10, 10a, the axle 13 of the universal wheel 12 is fixed to the lower end portion of the caster body 11 turning around the vertical axis (FIG. 2 ( c)).
When the universal wheel 12 (12a) is in contact with the grounding surface 45, the axle horizontal plane 15 passing through the axle 13 with a plane parallel to the grounding surface 45 intersects the outer periphery of the universal wheel 12 when the universal wheel 12 (12a) contacts the grounding surface 45. It is set as “universal wheel middle abdomen 17” (FIGS. 2B and 2C).

(3) Also, the lower surfaces of the two main floor frames 2 and 2 between the caster mounting plates 7 and 7 and the caster mounting plates 8 and 8 at the intermediate position in the front traveling direction 46 of the floor frame 1, that is, in the front-rear direction. The fixed casters 20 and 20 having no turning function are respectively fixed.
The fixed caster 20 is configured as follows (FIGS. 2 and 3). The shaft plate members 21 and 21 are arranged substantially in parallel with a predetermined interval, and the axle 26 of the fixed wheel 25 is fixed to the shaft plate members 21 and 21. The “V-shaped” contact members 22, 22 in a plan view are fixed to the front and rear openings of the shaft plate members 21, 21. The contact member 22 includes both contact plates 23 and 23 arranged at an angle θ (about θ = 75 °) in the front-rear direction (forward travel direction 46). The contact member 22 (contact plate 23) constitutes a “contact surface” that is formed obliquely in the traveling direction, and the angle θ of the contact plate 23 is set to the free wheel 12 of the universal caster 10 (10a). 12a) is in contact with the part,
θ <90 °
Is desirable. In addition, it is preferable in relation to the free wheel 12 that decreases θ, but if it is decreased, the contact member 22 becomes too long in the arrow 46 (traveling direction) in a plan view.
60 ° <θ <90 °
The degree is considered a practical range.
Further, the free caster 10 (10a) hits the free wheel 12 (12a) of the free caster 10 (10a) against the friction caused by the material of the free wheel 12 or by reducing the friction of the outer surface of the contact plate 23. If you can run away,
90 ° <θ <150 °
It can also be a degree (not shown). Further, in a plan view, the front ends of the contact plates 23 and 23 are partially circular (FIG. 4), or the entire contact member 22 (contact plates 23 and 23) is hemispherical (not shown). You can also

(4) In addition, when the wheel 26 touches the grounding surface 45 with the fixed wheel 25, the “fixed” is the point where the axle horizontal plane 28 passing through the axle 26 has a plane parallel to the grounding surface 45 intersects the outer periphery of the fixed wheel 25. It is referred to as a wheel middle abdomen 29 ”.

The lower edge 22a of the contact member 22 is formed in the same manner as the lower edge 21a of the shaft plate member 21, and both the lower edge 22a of the contact member 22 and the lower edge 21a of the shaft plate member 21 are “fixed wheels”. It is located below the middle abdomen 29, 29 "(FIG. 2 (c)). That is, when the height _{H 1} from the ground plane 45 to a fixed wheel in the abdomen 29 (axle 26), and a height _{H 2} of up to the lower edge 22a of the abutting member 22 from the ground plane 45,
H ₂ <H ₁
(FIG. 2 (c)).
Further, the lower edge 22a of the abutting member 22 is positioned below the "universal wheel middle abdomen 17" of the universal wheel 12 (12a) (Fig. 2 (c)). That is, when the height H ₁₁ from the ground contact surface 45 to the free axle middle abdomen portion 17 (axle 13),
H ₂ <H ₁₁
(FIG. 2 (c)).

(5) Here, the shaft cover members 21 and 21 and the contact members 22 and 22 constitute an alignment cover 24 (FIG. 2). The fixed caster 20 is. The upper edge (= the upper edge of the contact member 22) of the shaft plate member 21 of the alignment cover 24 is fixed to the lower surfaces of the main floor frame members 2 and 2.

(6) A pallet 34 on which a load is placed is mounted on the floor frame 1 so that it can be raised and lowered, and side panels 35, 35 for preventing load collapse are attached to the wide side end and the narrow side end of the floor frame 1. As described above, the transport carriage 40 of the present invention is configured (FIG. 5).

2. Use of the carriage 40

(1) With this transporting carriage 40, a load can be placed on the pallet 34 and transported in the same manner as an ordinary transporting carriage. In this case, since the fixed caster 20 that does not turn is located in the central portion, the vehicle can travel straight ahead as compared with the case of all the free casters, and the forward and backward free casters 10 and 10a can be bent and turned to some extent. Yes.

(2) Further, when the transport carriage 40 is not used, the pallet 34 is folded or raised along the wide side panel 35 in the same manner as a normal transport cart, and the narrower side surface is The panel 35 is removed and placed along the outside of the wide side panel (or the narrow side panel 35 is removed and stored outside), and the upper surface of the front side (narrow side) of the floor frame 1 is exposed.
In this state, a plurality of transport carts 40, 40A, 40B,... Can be nested so that the side surfaces of the main floor frame members 2, 2 of the floor frame 1 are along each other (FIGS. 6, 7). .
In this case, the narrow side (front side) traveling on one transport cart 40 is pushed toward the wide side (rear side) of the other transport cart 40B that is stationary (FIGS. 6A and 7). (A)). At this time, if the free casters 10, 10A, 10B collide with each other, the free wheels 12 (12a), 12A (12aA), 12B (12aB) of the free casters 10 (10a), 10A (10aA), 10B (10aB). ) Does not affect the traveling direction of the single transport carriage 40.
Moreover, a part or all of the universal wheels 12A (12aA) and 12B (12aB) of the universal casters 10A (10aA) and 10B (10aB) of the other carriages 40B and 40A are directed in directions other than the direction indicated by the arrow 46. Even when the free casters 10A (10aA) and 10B (10aB) of the other transport carts 40B and 40A collide with the fixed caster 20 of one transport cart 40, the fixed casters 20 are aligned. The cover 24 comes into contact with the universal wheels 12A (12aA) and 12B (12aB) of the universal casters 10A (10aA) and 10B (10aB), and the universal casters 10A (10aA) and 10B ( 10aB) is swung so that the fixed wheel 25 of one transport carriage 40 comes into contact with the other transport carriages 40B and 40A. Not (FIG. 6 (a) (b), FIG. 7 (a) (b)).
In addition, the collision of the casters considered normally is a case where the fixed caster 20 of one transport cart 40 collides with the free wheels 12aA and 12aB on the rear side of the other transport carts 40A and 40B (FIG. 1 ( b)).
Therefore, the fixed wheel 25 of the one transporting carriage 40 can travel in the desired traveling direction as it is and can be stored in a predetermined nesting position (FIG. 6B).

(3) Further, when pulling out one transporting carriage 40 from the nesting state, the operation is performed in the same manner as a normal transporting carriage of this type. At this time, even if the fixed caster 20 of one transporting carriage 40 that is accidentally pulled out collides with the universal casters 10A (10aA) and 10B (10aB) of the other transporting trucks 40B and 40A, the same transporting is performed. Since the alignment cover 24 of the carriage 40 contacts the free wheel 12 (12a) of the free caster 10 (10a), the free caster 100, 10a does not touch the fixed wheel 25. Further, when pulling out one transporting carriage 40, even if the free wheel 12 of the one transporting truck 40 faces in a direction other than the direction indicated by the arrow 46, the transporting truck 40A in a nesting state, Similarly, even if the fixed wheels 20A and 20B of 40B come into contact with each other, the universal wheel 12 of one transporting carriage 40 contacts the alignment covers 24A and 24B of the transporting trucks 40A and 40B. There is no hindrance to the drawer.
Therefore, there is no possibility that the direction will be inadvertently changed or stationary when the one transport carriage 40 is pulled out of the nesting state.

3. Other embodiments of the carriage 40 ◎
(1) In the above-described embodiment, the alignment cover 24 includes the shaft plate members 21 and 21 that stop the axle 26 of the fixed wheel 25. However, the alignment cover 24 can be configured by only the abutment member 22. Not) In this case, the axle 26 is attached to the caster body 51 of the normal fixed caster 20, and the alignment cover 24 extends in the front-rear direction of the fixed-wheel middle abdomen 29 of the fixed wheel 25, in the left-right direction orthogonal to the front-rear direction in plan view. The alignment cover 24 (contact member 22) may be positioned.

(2) Moreover, in the said embodiment, although the trolley | bogie 40 was made into the 6 wheel which has arrange | positioned the free casters 10 and 10 in the four corners, and the two fixed casters 20 and 20 in the center, the fixed caster 20 is one. It is also possible to form a wheel (not shown), and the free casters 10 and 10 are arranged on the front side (or rear side), and the fixed casters 20 and 20 are arranged on the rear side (front side), respectively. (Not shown). That is, if there are both the fixed caster 20 and the universal caster 10 in the traveling direction 46, the arrangement thereof is arbitrary.

(3) Moreover, in the said embodiment, if the trolley | bogie 40 is a structure which can be nested, the structure of the floor frame 1, the pallet 34, and the side panel 35 is arbitrary (not shown).

DESCRIPTION OF SYMBOLS 1 Floor frame 2 Main floor frame material 3 Long connection material 4 Short connection material 7, 8 Caster mounting plate 10, 10a Swivel caster 12, 12a Swivel wheel 13 Swivel wheel axle 15 Axle horizontal plane 17 Swivel wheel middle part 20 Fixed caster 21 Shaft Plate member (alignment cover)
22 Contact member (alignment cover)
23 Contact plate (contact member)
24 Alignment cover 25 Fixed wheel 26 Axle of fixed wheel 28 Axle horizontal plane 29 Fixed wheel middle part 34 Pallet 35 Side panel 40 Carriage truck 45 Running surface (ground surface)
46 Driving direction (forward driving)

Claims (2)

A transport cart characterized by having casters attached to the lower surface side of the floor frame that supports the pallet on which the cargo is placed, and configured as follows.
(1) The transport cart is a plurality of transport carts, and is formed so as to be able to be nested by overlapping a floor frame in a plan view,
And the fixed caster which has a fixed wheel was attached.
(2) A universal caster having a universal wheel is attached to the floor frame on one side or both sides of the fixed caster in the traveling direction of the transport carriage.
(3) An alignment cover covering the outer periphery of the fixed caster was attached.
(4) The alignment cover is in a state in which one transportation cart and the other transportation cart are nested,
It was formed in such a structure that the fixed wheel of one transporting carriage and the free wheel of the other transporting truck do not contact each other.
(5) The alignment cover has a contact surface that is inclined in the traveling direction on one or both of the front side and the rear side in the traveling direction. A transport cart characterized by having casters attached to the lower surface side of the floor frame that supports the pallet on which the cargo is placed, and configured as follows.
(1) The transporting carriage has a structure capable of nesting by overlapping a plurality of transporting carriages in a plan view.
And the fixed caster which has a fixed wheel is provided.
(2) A free caster having a free wheel is arranged on one side or both sides of the fixed caster in the traveling direction of the transporting carriage.
(3) The fixed caster was provided with an alignment cover covering the outer periphery of the fixed wheel.
(4) With the fixed wheel and the universal wheel in contact with the ground surface,
The point where the diameter parallel to the ground contact surface of the free wheel is located on the outer periphery of the free wheel is referred to as the “free wheel middle abdomen”,
The point where the diameter parallel to the ground contact surface of the fixed wheel is located on the outer periphery of the fixed wheel is the "fixed wheel middle part",
(5) The alignment cover is disposed on the side of the free wheel from at least the middle part of the fixed wheel of the fixed wheel,
And the lower end of the alignment cover was located below the middle part of the universal wheel.
(6) The alignment cover has a contact surface that is inclined in the traveling direction on one or both of the front side and the rear side in the traveling direction.

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