CN108473151B

CN108473151B - Hand cart

Info

Publication number: CN108473151B
Application number: CN201780006268.8A
Authority: CN
Inventors: 藤井昭司; 远泽真一; 杉村卓哉
Original assignee: Endou Shoji Co ltd
Current assignee: Endou Shoji Co ltd
Priority date: 2016-01-13
Filing date: 2017-01-06
Publication date: 2021-03-12
Anticipated expiration: 2037-01-06
Also published as: KR20180084882A; KR102088120B1; CN108473151A; WO2017122582A1; JP2017124727A; JP6667086B2

Abstract

Provided is a cart which prevents a front wheel from colliding with a step and falling forward in a traveling direction when gravity is not applied to a front arm support table. The cart is provided with: a pair of support frames (13) which are fixed to the pair of front wheels and the pair of rear wheels at a predetermined distance in the left-right and front-rear directions and are disposed opposite to each other; is fixed on each support frame (13) at an angle theta₁A pair of column brackets (14) inclined to the rear wheel side; a handle frame (16) which is erected between the two support column frames and is provided with a forearm support table (19); and a shopping basket stand (20) protruding toward the front wheel side, wherein each column bracket (15) is erected from a position forward in the traveling direction from the middle position on each support frame (13), a front arm support stand (19) is provided forward in the traveling direction including a position directly above each rear wheel (12), and the front wheel (11) is attached forward in the traveling direction from a virtual down-plumb line (P1) that hangs down through the center point of the shopping basket stand (20).

Description

Hand cart

Technical Field

The present invention relates to a cart, and more particularly, to a cart having a forearm support base and adapted to support a forearm and an elbow for walking training, shopping, and the like.

Background

The present applicant has previously developed a shopping cart capable of carrying out walking training while shopping in a shopping mall or the like, and has already filed a patent application for that invention (see patent document 1 below) and has acquired patent rights (japanese patent No. 5843553).

As shown in fig. 8, the shopping cart 1 of the present invention includes: a pair of carriages 2 each having a front wheel 2a mounted on the traveling direction side and a rear wheel 2b mounted on the opposite side of the front wheel; at least 1 strut 3 fixed to the trolley; and a shopping basket placing table 5 for placing a shopping basket and a handle portion 6 for a user to operate, which are mounted on this pillar. The handle 6 has a handle frame 7 formed by bending from the upper end of the column 3 toward the rear wheel 2b, the handle frame 7 is provided with a forearm support base 8 for supporting the forearm and elbow of the user and a grip portion 7a projecting in the direction in which the front wheel 2a is provided, and the carriage 2 is provided on both side surfaces thereof with anti-rolling mechanisms 9 for covering at least the side surfaces outside the rear wheel.

Although not shown in fig. 8, the column 3 of the shopping cart is divided into an upper part having the handle 6 and the shopping basket placement base 5 and a lower part having the cart, and the column 3 is provided with a height adjusting mechanism for freely adjusting the height of the upper column with respect to the lower column. Such an adjustment mechanism is a mechanism in which a through hole is formed in a side surface of the support column, and a coupling member is inserted into the through hole, or a mechanism in which a piston cylinder is provided between an upper portion and a lower portion.

The shopping cart can support the forearm or elbow on the support table to support the body weight, and can be used for shopping easily by a user who has a certain disease and is difficult to walk. In addition, the user can walk as rehabilitation training when shopping. For example, in a shopping mall or the like, when a user who has difficulty walking due to weakness in the waist and legs or fracture of his or her body can shop while shopping by putting his or her elbow or forearm on a support table with the shopping cart and holding the holding part with his or her hand, and walking in the shopping mall or the like, the user can also perform rehabilitation training while shopping.

In addition, the shopping cart is provided with anti-rolling-in mechanisms 9 on both sides of the cart, and the anti-rolling-in mechanisms 9 cover the outer side surfaces of the rear wheels 2b, thereby preventing the rear wheels from catching on goods or racks placed on the road when the cart is going straight or turning. Furthermore, because of the height adjustment means, the height of the shopping trolley can be adjusted according to the physical constitution of the user.

The present applicant has made a registration application for the design related to the shopping cart described above in cooperation with another applicant, and the registration application for the design has also been registered as japanese patent No. 147483 (patent document 2).

In the design related to the design registration, the article is named as "walking assist cart with shopping basket stand", and the walking assist cart is provided with a forearm support base for supporting a forearm and a grip portion projecting in a direction in which a front wheel is provided, thereby helping a walking difficulty person to perform rehabilitation walking training and shopping at the same time. The side of the pillar is provided with an adjusting fixing part, so that the height of the vehicle body can be adjusted according to the physique of a user to fix the vehicle.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-078965

Patent document 2: japanese design registration No. 1474834

Disclosure of Invention

Problems to be solved by the invention

The following improvements have been found in the development of shopping carts and walking assist carts with shopping basket stands, which are adaptable to various conditions and forms of use.

(a) However, in the case where the forearm support base does not support the body weight and a large number of products are placed on the shopping basket placing base and a heavy weight is supported by the shopping basket placing base, the cart may be inclined forward in the traveling direction when the front wheel collides with a step having a fall or the like. Such forward tilting is likely to occur when a user does not pay attention to items placed on the front arm support base or does not know the method of use of the front arm support base, and the front arm support base is used in a conventional supermarket or other conventional shopping cart.

(b) When the shopping basket is taken out from the shopping basket placing table, the shopping basket easily collides with the holding part on the handle and is not easy to take outwards, and in order to avoid the collision, when the shopping basket is taken obliquely, articles in the shopping basket possibly fall outside.

(c) When a large amount of articles are purchased and the weight is heavy, for example, about 8kg, the shopping basket placement table must be able to withstand the weight.

(d) The height adjusting mechanism is a mechanism in which a through hole is formed in a side surface of the column, and the coupling member is inserted into the through hole, or a piston cylinder is provided between the upper portion and the lower portion, and therefore, the processing of the through hole and the coupling member column is troublesome, and the coupling member needs to be added, and in addition, when the piston cylinder is used, the volume is easily increased, and the price is increased.

(e) The brake device is needed during walking training, but the brake device is not available at present.

The present invention has been made to solve the above-mentioned problems (problems). The invention aims to provide a handcart with a forearm support table, which can prevent a front wheel from falling forward in a traveling direction even if the front wheel bumps against a step when the body weight is not applied to the forearm support table, and can safely carry out walking training, shopping and the like.

Means for solving the problems

In order to solve the above problem, a cart according to claim 1 of the present invention includes: a pair of front and rear wheels; a support frame that fixes the front wheel and the rear wheel at predetermined distances in the left-right direction and the front-rear direction, respectively; the support frame is inclined upwards at an angle theta greater than 90 degrees from the horizontal direction₁A strut frame arranged in the manner of (1); a handle frame extending from the column frame and provided with a forearm support table and a holding part positioned at the front side of the forearm support table; and a shopping basket table provided in front of either the column frame or the handle frame, a bottom surface of the shopping basket table being inclined upward by an angle theta from a horizontal direction₂A rear edge of the bottom surface is arranged at a position forward of the grip, an axis of the rear wheel is arranged at a position rearward of a center of the front arm support stand in a front direction, and an axis of the front wheel is arranged substantially rearward of a center passing through the shopping basket standAn imaginary drooping line drooping from the center is located forward.

A cart according to claim 2 of the present invention is based on the cart according to claim 1, wherein the angle θ is₁Is 100 to 110 degrees, and the angle theta is₂Is 10-20 degrees.

A cart according to claim 3 of the present invention is the cart according to claim 1, wherein the front wheels and the rear wheels coupled to the column frame are spaced apart from each other at a narrow interval, and the rear wheels are spaced apart from each other at a wide interval, and wherein the front wheels and the rear wheels are formed into a substantially isosceles triangle shape when the front wheel side is taken as a vertex and the rear wheel side is taken as a base.

A cart according to claim 4 of the present invention is the cart according to claim 1, wherein the support frame includes a pair of front wheel support arms provided to face each other and to which the front wheels are fixed, and a stage on which an object is placed is provided between the front wheel support arms.

A cart according to claim 5 of the present invention is based on the cart according to claim 1, wherein the support frame has a pair of rear wheel support arms provided to face each other for fixing the rear wheels, and the rear wheel support arms are connected to each other by a fitting cross member.

A cart according to claim 6 of the present invention is the cart according to claim 1, wherein the shopping basket base is mounted with a basket in a cubic shape, the shopping basket base is provided with a mounting bracket for positioning a front-rear position of the basket and a side frame for suppressing lateral displacement of the basket, and a part of the side frame is formed of an arm for preventing erroneous mounting.

A cart according to claim 7 of the present invention is the cart according to claim 1, wherein the handle frame is coupled to upper end portions of the respective support frames by a telescopic coupling mechanism.

A cart according to claim 8 of the present invention is the cart according to claim 1, further comprising a brake device capable of braking at least one of the front wheels and the rear wheels.

A cart according to claim 9 of the present invention is based on the cart according to any one of claims 1 to 8, wherein the support frame, the column frame, and the handle frame are each formed of a hollow tube.

ADVANTAGEOUS EFFECTS OF INVENTION

The hand truck of claim 1 wherein the column frame is inclined upward from the horizontal at an angle θ greater than 90 ° on the support frame₁Since the front arm support base is installed upright in an inclined manner, the front arm support base can be installed forward in the traveling direction including directly above the rear wheel. This allows the forearm or elbow to be placed on the support platform, for example by pressing the weight of the entire body onto it, without the front wheel sliding backwards, causing the cart or person to tip backwards. Further, by setting the angle θ of each pillar frame₁Set to a predetermined angle, thereby enabling to adjust the angle theta of the shopping basket table₂By adjusting the angle to the optimum angle, when articles are loaded on the shopping basket table, the center of gravity of the cart is prevented from moving backward and from falling forward in the traveling direction.

Further, since the front wheel is attached to the front side in the traveling direction of the virtual down-plumb line suspended through the center portion of the basket table, the front wheel does not tilt forward when hitting a step even if no body weight is applied to the forearm support base. In addition, such forward leaning may occur more frequently when the user does not notice the presence of the forearm support platform or does not know the use method of the forearm support platform and uses the forearm support platform as a conventional shopping cart in a supermarket or the like, but the forward leaning can be avoided by the design of the shopping cart, and the training or shopping can be performed safely and safely. Further, the shopping basket placed in the shopping basket table can be taken out without colliding with the grip portion.

In the cart of claim 2, the angle θ₁Is 100 DEG to 110 DEG, so that the height is high, even if the height is high, the forearm support table can be accommodated right above, and the angle theta₂Is in the range of 10 to 20 degrees, the goods in the shopping basket placed on the shopping basket table can be relatively easily seen from the rear of the shopping basket after the deflection of the goods is reduced.

In the cart of claim 3, since the pair of front wheels and the rear wheel are arranged in a substantially isosceles triangle, even if the entire body weight is pressed against the front wheel support base provided substantially directly above the rear wheel, the most stable state can be maintained, and backward tilting can be suppressed and prevented.

In the cart of the 4 th aspect, since the front wheels are fixed to the pair of front wheel supports, a relatively large space is formed between the supports and the curved portions provided upright on the column frame, and this large space can be used as a stage on which articles are placed.

In the cart according to the aspect 5, the pair of support frames are connected by the cross-beam to serve as a nesting cross-beam, so that the holder and the support frame can be prevented from being shaken when nesting (nesting) is performed, and by providing the holder when nesting, a plurality of carts can be nested in a well-ordered manner, and a single cart can be pulled out easily.

In the cart according to claim 6, the rear arm of the side frame can be used as an arm for preventing the shopping basket from being placed in the wrong vertical direction. That is, even if the basket is placed as intended, the space between the other arcuate arms does not hold the basket, and therefore, the basket can be prevented from being erroneously placed in the vertical direction.

In the cart of claim 7, the handle frame is coupled to the upper end of each of the support frames by a telescopic coupling mechanism, so that the cart can be used with its height adjusted.

Since the cart of claim 8 is equipped with a brake device, it can be freely stopped and moved.

In the cart according to claim 9, since the support frame, the pillar frame, and the handle frame are each formed of a hollow tube, the overall weight is reduced and the design is improved.

Drawings

Fig. 1 shows a cart according to an embodiment of the present invention, fig. 1A is a side view, and fig. 1B is a side view illustrating features of the cart of fig. 1.

Fig. 2A is a front view and fig. 2B is a rear view of the cart of fig. 1.

Fig. 3 is a side view of a state in which a plurality of carts are nested.

Fig. 4 shows a handle holder, fig. 4A is a side view, and fig. 4B is a front view.

Fig. 5 shows a forearm support table, fig. 5A is a plan view, and fig. 5B is a side view.

FIG. 6 is a perspective view of a shopping basket stand.

Fig. 7 shows a shopping basket stand, fig. 7A is a plan view from directly above, fig. 7B is a plan view from directly above, viewed from a lower angle, and fig. 7C is a side view.

Fig. 8 shows a shopping cart according to the related art, fig. 8A is a plan view, and fig. 8B is a side view.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are examples of carts embodying the technical idea of the present invention, and the present invention is not limited to these, and products of other embodiments included in the scope of the present patent application are also suitable.

In the present specification, the term "cart" is used to indicate "カ one-hundred" in japanese, and the term "cart" is used to indicate "cart" in japanese katakana, and although the dimensions are exemplary, the present invention is not limited to this.

Hereinafter, a cart according to an embodiment of the present invention will be described in brief with reference to fig. 1. Fig. 1 shows a cart according to an embodiment of the present invention, fig. 1A is a side view, and fig. 1B is a side view for explaining features of the cart of fig. 1.

The cart 10 according to the embodiment of the present invention includes: a pair of front wheels 11 and rear wheels 12; a pair of support frames 13, 14 provided to face each other in a predetermined length and fixing the front wheels and the rear wheels so as to be spaced apart from each other by a predetermined distance in the front-rear left-right direction; fixed to each supporting frame at an angle theta from the supporting frame to the rear wheel side₁A pair of column holders 15 disposed to be opposed to each other at an inclined angle and having a predetermined length; a handle holder 16 (hereinafter, also referred to as a handle grip) extending from each of the column holders and provided between the two column holders and having a forearm support base and a grip portion; and is fixed toEither the column frame 15 or the handle frame 16 is at an angle θ₂A shopping basket table 20 protruding upward and toward the front wheel side.

A pair of opposing column brackets 15 are provided upright on one of the support frames 13 from a position forward in the traveling direction of the vehicle than the middle position of the front and rear wheels. The front arm support frame 19 is provided forward in the traveling direction of each rear wheel 12 (see an imaginary vertical drop line P3 in fig. 1) including directly above the rear wheel, and the front wheel 11 is mounted forward in the traveling direction of an imaginary vertical drop line P1 that is drawn through an approximate center point of the shopping basket table 20.

This cart 10 has the following effects. That is, the pair of support frames 15 arranged to face each other are supported by the pair of support frames 13 from the axles 11 of the front wheels 11 and the rear wheels 12₀、12₀ Intermediate position 0 therebetween is located forward in the traveling direction so as to be inclined toward the rear wheel side (angle θ)₁) The front arm support base 19 can be disposed at a high position forward in the traveling direction including directly above the rear wheel 12. Thus, even if the forearm or elbow is supported on the table and the entire body weight is pressed thereon, the front wheel does not float upward, and the cart or the person does not fall backward.

Further, the angle θ of each column frame 15 is set₁Set to a prescribed angle, the angle theta of the shopping basket table can be set₂The optimum angle is set so that when an article is placed on the shopping basket table 20, the center of gravity of the cart is moved backward, and forward tilting in the traveling direction can be suppressed and prevented. Further, since the front wheel 11 is attached to the front side in the traveling direction of the vertical line P1 that hangs down through the center portion of the shopping basket stand 20, even when the weight is not applied to the forearm support base, the forward tilting of the front wheel due to the front wheel hitting against a step can be suppressed and prevented.

In addition, although such forward tilting is likely to occur when a user does not notice the presence of the forearm support base or does not know the method of use thereof, and the user uses the same as a general supermarket shopping cart, the risk can be avoided by the present invention.

As can be seen from the above, the cart can perform walking training or shopping safely and with ease.

Hereinafter, the components constituting the cart according to the embodiment of the present invention will be described with reference to fig. 1 to 5.

Each member of the front wheel, the rear wheel, the support frame, and the column frame will be described with reference to fig. 1 to 3. Fig. 1 shows a cart according to an embodiment of the present invention, fig. 1A is a side view, fig. 1B is a side view illustrating features of the cart of fig. 1, fig. 2A is a front view of the cart of fig. 1A, fig. 2B is a rear view, and fig. 3 is a side view of a state in which a plurality of carts are nested together.

As shown in fig. 1 and 2, the pair of front wheels 11 have predetermined diameters and widths, and are fixed to a pair of support frames 13 provided to face each other by a rotatable fixed support member 11 a. This front wheel 11 consists of a wheel axle 11₀And a rubber tire mounted on the outside of the circular ring frame. In addition, this front wheel is also called a caster. The front wheel 11 is rotatably mounted around a support shaft of the fixed support member 11a, and the front wheel 11 rotates around the support shaft when turning or changing directions. In addition, the height H3 from the ground of the pair of support frames 13 with the front wheels 11 attached is larger than the axle 12 of the rear wheels 12 described later₀Is high. With this height, forward toppling can be suppressed. The front wheel 11 has a diameter of 18cm and a width of 2.5cm, for example. The height H3 (see fig. 1A) of the support frame 13 on which the front wheels 11 are mounted is 25cm higher than the ground.

The pair of rear wheels 12 have a predetermined diameter and width, respectively. Are secured to a pair of support brackets 14. The rear wheel 12 has an axle 12₀The circular rim of (2) and a rubber tire mounted on the outside of the circular rim are configured in the same manner as the front wheel. The rear wheels 12 are movable only in the front-rear direction, unlike the front wheels 11. The rear wheel has dimensions of, for example, 18cm in diameter and 2.5cm in width, which are the same as the front wheel 11.

As shown in fig. 1 and 2, a pair of support frames disposed to face each other is composed of 2 kinds of support frames 13 and 14. Of these supports, one support 13 is a front wheel support having a front wheel 11, and the other support 14 is a rear wheel support having a rear wheel 12.

The one support frame 13, i.e., the front wheel support frame, is composed of frame portions 13b (see fig. 1A) which are substantially parallel to each other with a predetermined distance therebetween in the left-right direction, and a bent portion 13a (see fig. 1A and 2) which connects the frame ends (traveling direction), and is formed in a substantially horizontal U-shape, and the front wheel support frame is formed of a hollow pipe having a predetermined thickness and length.

In addition, the hollow tube may be made of a metal material or a resin material.

Each frame portion 13b is provided with a mounting portion 13 for fixing front wheel 11₁(refer to fig. 1A). The front wheel 11 and the mounting part 13₁The axle 11 being rotatable forwards or backwards, but the front wheels 11₀Is located forward in the traveling direction from the virtual lower perpendicular line P2 (see fig. 1B).

Since the front wheel 11 is fixed to the support frame 13 and is fixed to the front side in the traveling direction with respect to the virtual down-center line P2, a relatively large space is formed between the bent portion 13a at the front end and the bent portion ab provided upright on the column frame 15. This wide space can be used as the stage 13d on which the article is placed. The stage 13d can be loaded with articles of fixed shape such as luggage and the like. At this time, if the article is too large, it collides with the shopping basket stand 20, so that it is preferable to design the shopping basket stand to be freely attachable and detachable.

The support brackets 13 are dimensioned such that, for example, a gap L between the two bracket parts 13b₂₂The length of the arc starting portion 15 from the front end bent portion 13a to the column holder is L which is 28cm (see FIG. 2A)₃25.63cm, front end bent portion 13a to mounting portion 13₁Distance L of₂It was 13cm and the thickness (diameter d) was 3 cm.

As shown in fig. 1 and 2, the pair of rear wheel supports 14 are each composed of a pair of lower brackets 14a and an upper bracket 14 b.

The lower bracket 14a has one end fixed to the pillar brace 15 and the other end provided with a fixing member 14 a' (see fig. 1A) for mounting the rear wheel 12, and is formed of a pipe of a predetermined length and thickness bent in a substantially arcuate shape. The upper holder 14b is alsoThe rear wheel 12 is mounted on the lower bracket with a predetermined space, and has one end fixed to the pillar brace 15 and the other end provided with a mounting/fixing member 14 b' (see fig. 1A) for mounting the rear wheel 12, and is formed of a pipe having a predetermined length and thickness, which is bent substantially in an arcuate shape. A wheel mounting member 14c is fixed between the fixing member 14a 'and the fixing member 14 b'. As shown in fig. 1A, the wheel mounting member 14c is formed of a pair of substantially horizontal U-shaped pieces 14 opposed to each other with a gap of a width for mounting the wheel, which is formed between the fixing members 14 a' and 14b₁、14₂(refer to fig. 2B).

The rear wheel support frame 14 fixes the wheel mounting members 14c and then fixes one ends of the upper and

lower brackets

14b and 14a to the column frame 15, and the distance between the wheel mounting members 14c is widened outward, that is, the distance between the wheel mounting members 14c facing each other is widened. Further, between the pair of upper brackets 14b, a cross member 14d spanning between these brackets is attached to a fixing portion 15 apart from each of the column brackets 15₂(see fig. 1A) a predetermined distance (see fig. 2B). In addition, symbol 14d₁This attachment location is shown. The cross member 14d can serve as a fastener for nesting while preventing the upper frame 14b from rocking while maintaining the interval between the rear wheel support frames 14. In addition, this beam frame may be mounted on the lower bracket 14 a.

Fig. 3 shows a state in which a plurality of carts 10A to 10C are nested. It can be seen from this figure that multiple carts can be nested together neatly by the cross-bar 14 d. But also easy to handle when the individual trolleys are extracted one by one. Additionally, the beam 14d may be named a nested beam from the function it serves. Symbol 15₁、15₂Indicating the fixation site. The rear wheel 12 may then surround the axle 12₀Is fixed to the wheel mounting member 14c so as to be freely rotatable.

With the above configuration, the interval between the rear wheel and the front wheel coupled to each support frame is set so that the front wheel is narrow and the rear wheel is wide, and the rear wheel is formed into a substantially isosceles triangle in plan view when the front wheel side is the apex and the rear wheel side is the base. Therefore, since the front wheel and the rear wheel fixed to the support frame are substantially isosceles triangles in plan view, this shape is the most stable shape, and safety can be ensured even when the entire body weight is applied to the forearm support base 19. The rear wheel 12 is fixed between the gaps of the rear wheel fixing member 14c to prevent the roll-in of the skirt, and the design can be improved by the bow-shaped bending. The center-to-center dimension of the pair of front wheels 11 was 30.5cm, and the center-to-center dimension of the pair of rear wheels was 45 cm.

The rear wheel support bracket 14 is sized such that, for example, the fixing portion 15₁And 15₂Is 13cm, and the gap between the fixing portions 14a 'and 14 b' is 4.5 cm. Length of the support (fixed part 15)₁And the fixed portion 14 a') is 44 cm. The thickness (diameter) is 2.5cm, and a fixing part 15 is provided₁And 15₂The interval L of each column frame 15 at the position of (2)₃₃28cm, two fixing parts 15₂And 14 b' is 42cm apart.

The pair of column holders 15 extend upward from the respective support frames 13 through a bent portion ab extending by a predetermined length, and are formed of one frame connected to the support frames 13. The bent portion ab is located between the front wheel 11 and the rear wheel 12 and is larger than the axle 11 of the front wheel 11₀And a rear wheel axle 12₀The intermediate point O (see fig. 1B) therebetween, i.e., the length L of one-half of the distance between the two axles₁The point is located closer to the front wheel 11 (see fig. 1B). In addition, the length L₁The front-rear direction change is made in accordance with the traveling direction of the front wheels 11, e.g. 2L if forward₁76cm and 65.7cm backwards.

Angle theta of the bent part ab₁Is important. That is, when the angle is adjusted to 90 °, the design is deteriorated and forward tilting is likely to occur, and therefore, the angle range is preferably 100 ° to 110 °. The most suitable angle is 105 °. With this angle theta₁When the handle holder 16 is at the highest position, the center axis (P3, see fig. 1B) of the forearm support base 19 is positioned higher than the axle 12 of the rear wheel 12₀The grip portion 16f is provided from a portion which is most easily gripped from the center of the front wheel support base 19 (the length and angle are determined), and the attachment position of the shopping basket base 20 is determined so that the shopping basket does not collide with the front arm support base 19. In additionThe height of the vehicle (the height from the floor to the grip portion 16 f) can be adjusted in accordance with the height of the handle frame 16, and can be set to a range of 94cm to 116cm, for example.

The pair of support frames and each of the column frames are formed of 1 frame, and these frames have a substantially arcuate shape or a crescent shape in side view via a smoothly curved bent portion ab. This shape is more designable than a linear design. In addition, the support frame and the pillar frame may be manufactured separately.

The upper end portions of the pair of column holders 15 are each cut out with a predetermined length and a gap in the longitudinal direction to form a narrow groove (not shown), and the diameter of the hollow hole of the tube is compressed by fastening from the outside. This compression is achieved by externally mounting the fastening member 17. This fastening part may also serve as a height-adjusting part.

The handle frame 16 is connected by inserting a connecting/extending member 16a of the handle frame 16 into a hollow hole in the top of each column frame 15.

The height adjustment of the handle frame 16 is performed by moving the frame in the up-down direction, positioning the frame, and fastening and fixing the frame from the outside by the height adjusting member 17. The adjustment by the adjustment member 17 can be used by adjusting an appropriate height when the cart is used, and the height adjustment can be achieved only by forming the narrow groove and the fastening member, which is simple and inexpensive as compared with the conventional technique. The height of the forearm support base 19 of the cart is about 95cm from the floor. By the above method, the problem of improving the point (d) can be solved.

The dimensions of the strut rests 15 are set, for example, from the bend ab of the support to the edge 15₃Has a length of 36cm and a thickness equal to the diameter of the support frame, and the end part 15 of each support frame 15₃Interval L between₃₃Is 28 cm.

The handle holder will be described with reference to fig. 1A, 2, and 4. Fig. 4 shows a handle holder, fig. 4A is a side view, and fig. 4B is a front view.

As shown in fig. 1A and 4, the handle holder 16 includes: a pair of connecting and extending portions 16a which are connected to the pair of column brackets 15 and are provided to face each other with a predetermined length so that the height thereof can be adjusted; a pair of basket mounting portions 16b extending from the connecting/extending member and bent at a predetermined angle toward the rear wheel 12 side and disposed to face each other with a predetermined length; a pair of connecting portions 16c extending from the basket attaching portion and folded back toward the front wheel 11; a pair of stand mounting portions 16d extending from the connecting portion and bent toward the front wheel 11 with a predetermined gap from the shopping basket mounting portion; an extension 16e extending from the table mounting portion; and a holding part 16f arranged between the extending parts, wherein the handle frame is formed by a hollow pipe with a specified length and thickness.

The handle frame 16 extends upward from the pair of connecting/extending portions 16a, and the distance between the two frames is increased. The symbols cd, ef, gh, ij denote the respective meandering portions. The angle of the zigzag part ij is 135-145 degrees, theta₅The range of (c) is 35 ° to 45 ° (see fig. 1B).

The connecting and extending portion 16a is inserted into an end portion of the column frame 15 to be connected and extended. Angle theta of the meandering part cd₄And theta₁The same is true. The basket mounting portion 16b and the stand mounting portion 16d are substantially parallel. The gap between the pair of shopping basket mounting portions and the table mounting portion is set to a size that allows one hand-held small shopping basket to be placed therein, and the hand-held small shopping basket is placed and fixed between the pair of shopping basket mounting portions 16b disposed in opposition to each other. In addition, the pair of small shopping baskets at hand is not shown, but can hold some small articles, such as a purse, a key and other box bodies. A forearm support base 19 is mounted and fixed between the pair of base mounting portions provided to face each other.

The grip portion 16f is formed by a rod-shaped portion that is attached to protrude from both end portions of the front arm support base 19 in the traveling direction side and is bent into a semi-elliptical shape. The grip portion 16f is a portion to be operated by gripping the cart with a hand, and by gripping the grip portion, a person can easily and safely move the cart with a large amount of force. The handle holder has a size such that the length of the connecting/extending portion 16a is 37cm and the length of the table mounting portion 16d is 21 cm.

The forearm support table will be described with reference to fig. 5. Fig. 5 shows a forearm support base, fig. 5A is a plan view, and fig. 5B is a side view.

The forearm support base 19 has front and

rear surfaces

19a, 19b of a predetermined size and width, front and

rear side walls

19c, 19d of a predetermined length, and left and

right side walls

19e, 19 f. The surface 19a is provided with substantially semicircular projections 19a ', 19 a' at both ends in the longitudinal direction. The forearm support base 19 is formed of a substantially rectangular parallelepiped having a predetermined thickness, is substantially saddle-shaped in a plan view, and is formed of a resin molded body having a predetermined color. In addition, the inner surface 19b is provided with a screw hole 19 fixed to a table mounting portion 16d of the handle frame 16₁. The forearm support base 19 is mounted at a position immediately above the rear wheel 12 to the front wheel 11 side. The imaginary down-line P3 in fig. 1A is located closer to the axle 12 than the rear wheel 12₀The position closer to the front wheel 11 is a line passing through the center in the longitudinal direction of the forearm support base 19.

By providing the forearm support base at this position, even if the entire person is supported by the support base, the rear wheel is located behind the forearm support base, so that the weight of the user can be supported, and the person and the cart are not inclined. In addition, the protrusions 19a ', 19 a' on both sides can prevent the elbow of the user from slipping off.

The shopping basket table will be described with reference to fig. 1A, 6 and 7. Fig. 6 is a perspective view of the shopping basket stand, fig. 7 shows the shopping basket stand, fig. 7A is a plan view from directly above, fig. 7B is a plan view from a reverse angle from directly above, and fig. 7C is a side view.

The carrier stand 20 is capable of mounting a carrier 23 of a predetermined size and is composed of a carrier frame 21 for positioning the front and rear positions of the carrier 23 and a side frame 22 for preventing the carrier 23 from shifting laterally. The carriage 21 includes: a pair of 1 st projecting arms 21a which are fixed at both ends to the connecting and extending portions 16a of the handle frame 16 and are provided to face each other with a predetermined length; a pair of hanging arms 21b hanging from the front ends of the projecting frames and arranged oppositely; a pair of 2 nd projecting arms 21c extending forward from the front ends of the hanging arms by a predetermined length and disposed to face each other; and an arcuate arm 21d that is connected to the front end of the protruding arms and stands upward at a predetermined height. The carriage 21 is formed of a pipe having a predetermined length and thickness, that is, a pipe having a thickness which does not deform even when the shopping basket 23 is filled and the weight is increased. The carriage 21 is made of a tube thicker than the side frame 22 described later.

The 1 st projecting arm 21a and the hanging-down arm 21b are bent at substantially right angles, and this projecting arm 21a is supported by the support arm 21 b'. The length of the 1 st projecting arm 21a, i.e., the length of the projecting portion 16a projecting outward from the connection of the handle frame 16 is relatively short (e.g., 5 to 6cm), and the 1 st projecting arm 21a is formed as a strong support arm. Since this support arm is short and strong, the center of gravity is shifted in the direction of the rear wheel 12. The end of the 1 st projecting arm 21a passes through the connecting part 21₀An extension bolt 21 a' is formed to extend in the opposite direction to the drooping arm and has an external thread formed at the extended portion. The connection/extension portion 16a is coupled to the handle frame 16 by providing a through hole in the connection/extension portion 16a and fixing an extension bolt 21 a' with a nut through the through hole. The hanging arm 21b is parallel to the connecting/extending portion 16a of the handle frame 16.

Between the hanging arm 21b and the 2 nd projecting arm 21c according to an angle theta₃(see FIG. 1B) bending is performed. The shopping basket 23 is placed between the pair of 2 nd projecting arms 21c provided to face each other, and the arcuate arms 21d prevent the shopping basket 23 from slipping down forward.

The dimensions of the device frame are set such that, for example, the length of the 1 st projecting arm 21a is 11cm, the length of the hanging arm 21b is 10.5cm, the length of the 2 nd projecting arm 21c is 18cm, the height of the arcuate arm 21d is 6cm, the diameter of the tubular profile is 1.5cm, and the angle θ₃Is 90 deg..

The side frame 22 includes: a rear arm 22a fixed to a connecting portion between the 1 st projecting arm 21a and the hanging arm 21b and extending in the width direction by a predetermined length; a side arm 22b extending from the front end of the rear arm; and a coupling arm 22c extending from the side arm to be coupled with the 2 nd projecting arm 21 c. Of these arms, the rear arm 22a can prevent the shopping basket 23 from being erroneously laid out longitudinally, that is, not between the arcuate arms 21d even if the longitudinal laying is intended, and can also prevent the shopping basket 23 from falling off from the side. The rear arm 22a is also called an arm lever for preventing misloading, and this name is derived from its function. Further, the pair of side arms 22b and the coupling arm 22c are curved, and the design is improved.

The side frame 22 is set in size such that the rear arm 22a is 40cm long, the side arm 22b is 12cm long, the coupling arm 22c is 7cm long, and the thickness is 8mm, for example.

The basket table 20 is detachably attached to the connecting/extending portion 16a of the handle frame 16. That is, the extension bolt 21 a' is inserted through the through hole of the connecting/extending portion 16a and fixed by a nut. The installation is followed by tilting the 2 nd projecting arm 21c upward by an angle theta with respect to the horizontal line H1₂. This angle makes the items in the shopping basket 23 easier to view, and is preferably set at 10 to 20 in view of the shift in the center of gravity.

A shopping basket 23 is placed on the shopping basket stand 20, and when the shopping basket is filled, the gravity center moves to the side of the rear wheel 12, and the gravity center movement can play a role of restraining and further preventing the trolley from falling forward.

That is, when a shopping basket 23 (see fig. 1A) of a predetermined size is placed on the placement frame 21 of the shopping basket stand 20, the center point C of the shopping basket 23 becomes substantially the center of gravity as shown in fig. 1B. The center point of the shopping basket 23 is the center point C which is the intersection point of the diagonal lines of the rectangular placement surfaces because the placement surfaces are substantially rectangular when the shopping basket 23 is placed on the placement rack 21. When a virtual vertical line passing through the center point C is P2, the axle 11 of the front wheel 11 passes through_oIs P4₁A virtual down-line passing through the intersection of the support frame 13 and the column frame 15 is P4₂When the virtual down-plumb line P2 is at the virtual down-plumb line P4₁And an imaginary down-line P4₂P2 to the middle point, distance L₄、L_4’The lengths are the same or substantially the same, and the center point C is located on the line. In addition, even if the placement surface is not rectangular, the placement surface has the same center point if it is elliptical, and this center point corresponds to the center of gravity position. In addition, the size of the shopping basket 23 can be 538mm wide, 358mm deep, 252mm high, 30.1L volume, polypropylene material.

When the shopping basket is picked up, the shopping basket 23 hits the grip portion 16f of the handle holder 16 and cannot be smoothly taken out, so that a countermeasure is required.

Firstly, the mounting position of the slave supporting platform16d extend at an angle theta of extension 16e₅The angle is set in the range of 35 to 45 degrees (see fig. 1B), and the gap between the front end of the grip portion 16f and the vertical line extending from the rear surface of the shopping basket 23 is set to L₅According to H4tan theta₂Mixing L with₅The size of the sensor is set to be 0.5 cm-2 cm. By passing the gap L₅When the shopping basket 23 is pulled away, the handle portion 16f is not hit. H4 is the height of the shopping basket 23, theta₂Is the angle between the vertical line of the shopping basket and the side of the shopping basket, which is the same as the angle of the shopping basket stand 20. In order to prevent the shopping basket 23 from colliding with the grip 16f when the shopping basket is picked up, the rear edge of the bottom surface of the basket table 20 needs to be positioned forward of the front end of the grip 16 f.

As is clear from the above description, the shopping basket stand 20 is composed of the carrier frame 21 and the side frames 22, and the carrier frame 21 is thicker than the side frames 22 and is firmly fixed to the column frame 15, so that it can bear a heavy load and is stronger than the conventional technique. The above-mentioned point of improvement (c) can thereby be solved.

The assembly of the cart will be described with reference to fig. 1 to 5.

First, the support frames 13 and 14 and the column frame 15 are assembled. In this assembly, since the support bracket 13 and the column bracket 15 are formed of one frame in the present embodiment, the support bracket 14 is fixed to the column bracket 15.

The fixing is performed by welding to the column frame 15₁、15₂Two places.

The front wheel 11 and the rear wheel 12 are fixed to a pair of support frames 13, 14. On the other hand, a shopping basket stand 20 and a forearm support stand 19 are fixed to the handle frame 16. The handle frame 16 is mounted on the post frame to complete the assembly.

The shopping basket stand 20 may be fixed to the column frame 15 in addition to the handle frame 16.

As described above, the height of the cart 10 can be adjusted to 94-116 cm, and the height of the handle frame 16 can be adjusted according to the height of the user.

The cart 10 was tested under the following conditions and the results were obtained.

(f) Condition

Before improvement (previous trolley)

When a shopping basket is placed on the shopping basket table, the center of gravity is located at a position forward in the advancing direction of the front wheel axle.

15kg of articles were placed on the basket table, and a force of 40N was applied from the side surface of the front arm support table to observe the state when the front wheel hit a 5mm high step.

After improvement (handcart of the application)

An 18kg article was placed on the basket support base, and a force of 50N was applied from the side surface of the front arm support base, and the state when the front wheel hit a 5mm high step was observed.

(g) Results

(h) Investigation of

The cart before the improvement bears 15kg and the rear wheels are lifted when 40N force is applied. The improved trolley is capable of bearing 18kg of weight and can pass over the steps without lifting the rear wheels when a force of 50N is applied.

As a result of the above examination, it was confirmed that the cart of the present invention can prevent the cart from falling forward, as compared with the conventional cart before the improvement.

Angle theta is aligned with reference to fig. 1₁～θ₅The relationship of (A) will be described.

The angle theta is set under the condition that the frame part 13b of the support arm 13 is parallel to the ground at a predetermined distance from the ground and the basket mounting part 16b of the handle holder 16 is parallel to the frame part 13b₁～θ₄The relationship of (c) is as follows.

θ₁＝θ₄·········(1)

θ₁＝θ₂+θ₃·······(2)

From (2), θ can be derived₂The following were used:

θ₂＝θ₁-θ₃·······(3)

first, set theta₁. The front wheel 11 is fixed to the front in the traveling direction with respect to the virtual down-plumb line P2, the joint between the stay 13 and the stay frame 15 is provided on the front wheel side with respect to the virtual down-plumb line P1, and the forearm support base 19 is provided directly above the rear wheel 12 and even at a position shifted toward the front wheel.

Thus, the following angle is maintained within a suitable range, and the optimum value is 105 °.

θ₁＝100°～110°····· (4)

If the angle theta₁Beyond 110 deg., the handle frame 16 will be lifted to the uppermost position, the forearm support platform 19 will be behind the rear wheel 12 and there is a risk that the cart or even a person will fall to the rear. On the other hand, if the angle is less than 100 °, the center of gravity will shift in the direction of travel and the cart will risk falling forward.

Theta according to the above (4)₁Range of (2) and formula setting of (2) < theta >₂. In addition, θ₃The constant condition is 90 °.

θ₂＝θ₁-θ₃＝(100°～110°)-90°＝10°～20°

Thus, θ₂The suitable range is 10-20 degrees.

If the angle theta is₂When the angle is less than 10 degrees, the center of gravity is hard to move in the traveling direction, and when the angle exceeds 20 degrees, the shopping basket placed on the placing surface collides with the grip portion, and is hard to be taken up.

In addition, θ₅And theta₂Correspondingly, the angle is set to be 35-45 degrees to ensure that the shopping basket placed on the carrying surface can not collide with the holding part.

Thus, the above-mentioned improvements (a) and (b) are solved, and even if the weight of the articles placed on the shopping basket stand is increased without applying pressure to the forearm support stand of the cart, the cart will not fall forward in the traveling direction when the front wheel hits a rugged step or the like, and walking training, shopping, and the like can be safely performed. That is, the pair of column brackets are provided on the pair of support frames to be inclined (angled) from the front side in the traveling direction to the rear wheel side with respect to the intermediate position thereofDegree theta₁) Since the front arm support base is vertically disposed, the front arm support base can be disposed at a high position in the forward traveling direction including directly above the rear wheel. Thus, even if the weight of the whole body is applied by placing the forearm or elbow on the forearm support table, the front wheel will not be lifted up and the cart and person will fall backward.

In addition, if the angle theta of each strut holder is adjusted₁The angle theta of the shopping basket table can be selected by setting the angle as specified₂The optimum angle is selected so that the center of gravity of the cart is shifted rearward when the shopping basket is placed on the table, and this is advantageous in preventing or suppressing the cart from falling forward in the traveling direction. Further, since the front wheel is mounted on the front side in the traveling direction with respect to a virtual down-line that hangs down through the center portion of the shopping basket table, the cart can be prevented from falling forward due to the front wheel hitting a step even if no weight is applied to the forearm support table.

In addition, the improvement point (e), i.e., the brake device is required when the cart 10 is used for walking training, and therefore, the brake device is installed. The brake device is mounted on the support frame, the handle frame, etc., and is composed of a brake pad which contacts with at least one of the front wheel and the rear wheel to prevent the rotation thereof by friction, an operating handle provided near the grip portion of the handle frame, and a wire rope which connects the brake pad and the operating handle, and the brake device is not shown here. After the brake is installed, the cart 10 can be freely controlled to advance or stop.

Description of the symbols

10. 10A, 10B, 10C hand truck

11 front wheel

11_oAxle shaft

12 rear wheel

12_oAxle shaft

13. 14 support frame

13c article placing table

14d Beam frame (nested Beam)

15 support post frame

16 handle rack

17 height adjusting tool

19 forearm support table

20 shopping basket table

22a rear arm (arm for preventing error loading)

Imaginary down-line of P1 and P2

H1, H2 horizontal line

Claims

1. A cart is characterized by comprising:

a pair of front and rear wheels;

a support frame that fixes the front wheel and the rear wheel at predetermined distances in the left-right direction and the front-rear direction, respectively;

the support frame is inclined upwards at an angle theta greater than 90 degrees from the horizontal direction₁A strut frame arranged in the manner of (1);

a handle frame extending from the column frame and provided with a forearm support table and a holding part positioned at the front side of the forearm support table; and

a shopping basket table provided in front of either one of the column frame and the handle frame,

the bottom surface of the shopping basket table inclines upwards at an angle theta from the horizontal direction₂The rear surface rear side is disposed forward of the grip portion, the rear wheel shaft is disposed rearward of a center of the front arm support base in a forward direction, and the front wheel shaft is disposed forward of an imaginary down-hanging line that is down-hung through a substantial center of the shopping basket base.

2. A trolley according to claim 1,

the angle theta₁Is 100 to 110 degrees, and the angle theta is₂Is 10-20 degrees.

3. A trolley according to claim 1,

the interval between the front wheels and the rear wheels coupled to the column frame is set to be narrow, the interval between the rear wheels is wide, and the front wheels and the rear wheels are formed in a substantially isosceles triangle shape when one side of the front wheels is a vertex and one side of the rear wheels is a base.

4. A trolley according to claim 1,

the support frame is provided with a pair of front wheel support arms which are oppositely arranged and used for fixing the front wheels, and an object stage for placing objects is arranged between the front wheel support arms.

5. A trolley according to claim 1,

the support frame is provided with a pair of rear wheel support arms which are oppositely arranged and used for fixing the rear wheels, and the rear wheel support arms are connected by a nested beam.

6. A trolley according to claim 1,

the shopping basket table is used for loading a cubic basket, is provided with a loading frame for positioning the front and rear positions of the basket and a side frame for inhibiting the basket from shifting transversely, and is partially formed by an arm rod for preventing mistaken loading.

7. A trolley according to claim 1,

the handle frame is coupled to the upper end of each of the support frames via a telescopic coupling mechanism.

8. A trolley according to claim 1,

the cart is equipped with a brake device capable of braking at least one of the front wheels and the rear wheels.

9. A trolley according to any one of claims 1-8,

the support frame, the strut frame and the handle frame are all formed by hollow pipes.