JP2002264815A - Folding article carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding articles carriage formed by connecting right and left frames 20 and 22 and provided with a hanger 24 and a bottom plate 36 having casters to a rear surface frame 6 freely to be folded and capable of preventing noise due to a contact of metal materials with each other. SOLUTION: PVC pipes 46 and 48 are inserted into metal pipes 2, 8 and 10 forming the rear surface frame 6 and the right and the left frames 20 and 22. Several hinges 16 and 18 for connecting the right and the left frames 20 and 22 from the rear surface frame 6 are provided, and a bush 56 made of a synthetic resin material is fitted between the metal pipes 8 and 10. A hook 64 of the hanger 24 is engaged with an engaging piece 68 made of a synthetic resin material and fixed to the frame 22. A sponge rubber 88 is pinched between a frame 84 forming the bottom plate 36 and a cover 86, and hinges 32 and 34 are made of synthetic resin materials. A synthetic resin tube 98 is fitted in locks 96 and 97. A buffer rubber 104 is arranged on the top surface of right and left support pieces 28 and 30 for supporting the bottom plate 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable goods carrier mainly used in a distribution warehouse of a distribution company, and more particularly, to a method for significantly reducing noise during operation. It was made.

[0002] As prior art related to a foldable article transport trolley used for storing and transporting articles in a distribution warehouse of a distributor, there are Korean Utility Model Registration No. 69202, Korean Utility Model Registration No. 21258
No. 2, Korea Utility Model Registration No. 212583, and many other examples. In all of these, most parts are made of metal for robustness. In addition, since it is not a stacked type, it is configured to be foldable so that a larger number can be loaded in a given space during storage.

[0003] Therefore, unless the basic configuration is changed, severe noise is generated during operation due to the interval of play at the connecting portion where the parts are connected and the structural defect of the bottom plate. At present, it is causing serious problems when used in a computer.

[0004] The cause of noise generation and the degree of the noise of the folding carriage having such a structure are as follows. First, in order to maintain the rigidity while reducing the weight, the metal pipe and metal rod are welded in a lattice shape, and the rear frame and the left and right frames are welded and fixed to the support pieces to which the impact from the caster is directly transmitted As a result, severe noise is generated due to reverberation in the hollow portion of the metal pipe during operation.

The left and right hinges for connecting and supporting the left and right frames from the rear frame so as to be foldable are separately made of metal on the left and right, and then rotatably connected to the left and right frames using bolts and nuts. Later, it is fixed to the metal pipe of the rear frame by welding. These hinges generate noise due to friction between the metal materials due to play of the hinges during operation, regardless of whether the left and right frames are folded or not.

A hanger for connecting and supporting the front of the left and right frames is made of a metal material, one end of which is connected to a connection ring welded to one frame, and the other end of which is provided. The hooks are connected to and support the left and right frames by engagement with an engagement ring provided by welding to the other frame. This hanger,
In addition, during operation, due to the play between the connecting part and the engaging part,
Generates intense friction noise between metal materials.

[0007] In particular, the bottom plate is mainly formed by welding and fixing a cover made of a metal plate on a frame made of a metal material. Friction noise due to the gap between the cover and the wide cover generates severe vibration noise.

Further, in order to prevent noise from the bottom plate of the metal material, the bottom plate is injection-molded with a synthetic resin to constitute an assembling type, and at the time of assembling, both sides are supported by connecting metal support pieces. However, this only partially reduces the vibration noise of the wide bottom plate, and the hinge pins and hinges, which are the connecting means of the bottom plate, are mainly made of metal. Friction noise occurs.

[0009] Also, using the support pieces of the frame on both sides,
When the bottom plate is lowered, the lock for fixing the bottom plate has a play from the lock assay.Therefore, during operation in a non-loaded state, the contact between the support pieces of both frames and the bottom plate, and Heavy noise is generated by the play of the lock.

[0010] Therefore, the noise generated from one transfer trolley is extremely severe, and in a distribution warehouse operated by a department store or a large discount shop, articles are supplied from the time of closing the store until the opening of the next day due to its characteristics. Therefore, considering that hundreds of transport vehicles are being used at the same time every day at a specific time at midnight, the noise in the workplace must far exceed the noise regulation value. This not only impairs the working environment, but can also cause occupational diseases.

[0011] In particular, the logistics warehouse is located in a densely populated area in order to reduce logistics costs and transportation time, so that the noise generated from the workplace causes great damage to the local residents in the surrounding area. Due to residents' declarations and complaints, as they move to suburban areas far from most sales floors, aside from increasing logistics costs, they are unable to transport goods within a given time, and the business becomes enormous. Is causing serious damage.

[0012]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the working environment and eliminate the risk of occupational illness by eliminating the cause of noise generation of each part provided in the foldable article carrier. In particular, by aiming at a noticeable noise reduction to a level close to noiseless when operating the transport trolley,
The aim is to make it possible to operate a distribution warehouse even in densely populated areas.

In order to achieve the above object, according to the present invention, a P pipe is provided in a hollow portion of a metal pipe constituting a frame.
Insert the VC pipe and insert the bushings made of synthetic resin between the metal pipes of the left and right frames, respectively, on the several hinges that rotatably connect and support the left and right frames,
One end of the hanger for connecting and supporting the left and right frames is connected to a connecting piece of a synthetic resin material connected and fixed to the vertical pipe of one frame, and the hook at the other end is connected and fixed to the other frame. Engage with the engagement piece of synthetic resin material,
Regarding the bottom plate, the sponge rubber is sandwiched between the frame and the cover to separate them, and the hinges that connect and support the bottom plate so as to be folded are made of synthetic resin, A cushion rubber is attached to the support piece so that it can be separated from the support piece when the bottom plate is lowered, and locks installed on both sides of the bottom of the bottom plate are fitted or covered with synthetic resin tubes. It is characterized by comprising.

[0014]

FIG. 1 is a perspective view of the present invention. The present invention provides a rear frame 6 in which metal rods 4 are welded in a grid shape inside a metal pipe 2 forming an edge,
In front of both sides of this rear frame 6, several hinges 1
6, right and left frames 20 and 22 which are provided so as to be foldable by
Hanger 24 for connecting and supporting 0,22 and support pieces 26,28,30 provided at the lower portion of rear frame 6 and left and right frames 20,22, so as to be foldable using hinges 32,34. And the casters 38, 40, 42, 44 fixed and installed at the corners of the bottom surfaces of the support pieces 26, 28, 30.
It is composed of

Here, the vertical portions of the metal pipes 2, 8, and 10 constituting the frames 6, 20, and 22 are respectively provided.
From the through holes exposed to the bottoms of the support pieces 26, 28, 30
Insert PVC pipes 46, 48 of appropriate length tightly.

On the other hand, left and right frames 20 and 22 which are foldably connected to rear frame 6 and installed.
In this case, the vertical portions at the rear of the metal pipes 8, 10 partially protrude from the bottoms of the support pieces 28, 30, respectively, and the shaft holes 50, 52 are formed to protrude from both ends of the support piece 26 of the rear frame 6. It is inserted slightly loosely. In this way, the left and right frames 20, 22 have several hinges 32, 34.
And the shaft holes 50 and 52 as axes.

FIG. 2 is an exploded perspective view of a hinge for connecting and supporting the left and right frames 20 and 22 in a foldable manner. Each of the hinges 16 and 18 is configured to be separated into right and left so as to have two semicircular joints. At the time of assembling, a front connecting portion for connecting the left and right frames 20 and 22 in advance;
A bushing 56 made of a synthetic resin material, which is also formed separately on the left and right sides and has engaging edges 54 and 55 at upper and lower ends, is combined with a bolt and a nut at a position between the metal pipes 8 and 10 provided on the left and right frames. Connect and assemble. The rear joints of the hinges 16 and 18 are formed by welding and fixing to the metal pipe 2 of the rear frame 6.

FIG. 3 is an exploded perspective view of a hanger for connecting left and right frames according to the present invention. One end of the hanger 24 is connected to a connecting piece 60 made of a synthetic resin material which is fixedly connected to a front vertical portion of the metal pipe 8 constituting the one frame 20 by a metal plate 58 by a shaft bolt 62. . The hook 64 at the other end of the hanger 24 is
An engagement hole 7 provided in an engagement piece 68 of a synthetic resin material fixedly connected to a front vertical portion of the metal pipe 10 constituting the other frame 22 with a metal plate 66.
At 0, it is separably engaged.

Here, the connecting piece 60 and the engaging piece 68 of the synthetic resin material for connecting the hanger 24 are connected to the left and right frames 20 and 22 by utilizing the elasticity of the open portion in one of the connecting holes 72 and 74.
To the metal pipes 8 and 10. Also, the connecting piece 60
At the lower end of the engaging piece 68, engaging concave portions (grooves, cutouts or concave surface forming portions) 76, 78 are provided, which are combined with engaging projecting pieces 80, 82 protruding from the metal pipes 8, 10. Thus, the connecting piece 60 and the engaging piece 68 are fixed at the correct positions. Instead,
Since a through hole that penetrates the metal pipe can be provided and fixed by connecting with a long screw nail, rivet, or the like, the present invention provides the connecting piece 60 and the engaging piece 68 with the left and right frames 20 and 2.
Any structure can be used as long as it can be firmly connected and fixed to the metal pipes 8 and 10 of 2.

FIG. 4 is an exploded perspective view showing the structure and connecting means of the bottom plate of the present invention. The bottom plate 36 has a frame 84 in which several angles are connected between slave bars so that the upper surface becomes wide, a cover 86 made of a metal plate having several through holes 92, and a bottom plate 36 sandwiched therebetween. And a long sponge rubber 88 having an appropriate thickness. The sponge rubber 88 is preferably sandwiched between the portions where the frame 84 and the cover 86 are in contact with each other, so that the frame 84 and the cover 86 are separated from each other at any of the contact portions. When fixing the cover 86 using the screw 90, the cover 86 is tightly fixed so that a sense of unity is generated.

The metal locks 96 and 97 installed on the bottom surfaces on both sides of the bottom plate are fitted with a tube 98 made of a synthetic resin on their outer surfaces, or are covered with a synthetic resin. In the lock assembly (Lock As
guide holes provided on the right and left frames 20, 22 and lock holes 112 provided on the connecting pieces 110 of the left and right frames 20, 22.
Is brought into contact with the synthetic resin layer covered. The hinges 32 and 34 having the connecting means of the bottom plate 36 are
It is made of a synthetic resin and is connected to hinge pins 100 and 102 provided on both sides of the rear surface of the bottom plate 36.

FIG. 5 is a partially enlarged perspective view showing the support pieces of the left and right frames that support the bottom plate when the bottom plate of the present invention is expanded. When the bottom plate 36 is expanded and lowered, the support pieces 28 and 30 basically support the lock.
This structure is fixed in the rotation direction by engaging with a connecting piece 110 for locking by the lock 97. At this time, at least one or more buffer rubbers 104 are attached to the upper surfaces of the support pieces 28 and 30 so as to avoid direct contact between metal materials. As means for attaching the cushion rubber 104,
Forming a wedge-shaped coupling projection 106 having an engagement edge at the bottom,
The supporting pieces 28 and 30 are provided with connecting holes 108, and the connecting projections 106 of the buffer rubber 104 are forcibly inserted into the connecting holes 108, or are bonded and fixed to the upper surfaces of the supporting pieces 28 and 30 with a normal adhesive. Therefore, the present invention satisfies all the requirements as long as the buffer rubber 104 can be firmly adhered and fixed on the support piece.

The reference numeral 111 denotes a bottom plate handle, 114 denotes a folding lock hole in the bottom plate, and 116 denotes a carriage.

In the present invention configured as described above, the left and right frames 20, 22 are expanded from the rear frame 6 and aligned, and then the bottom plate 36 is expanded and the left and right frames 2 and 22 are expanded.
0, 22 with the engagement pieces 110, and the locks 96, 9
7 and the articles are stacked on the bottom plate 36 described above. Then, the hanger 24 connected to one frame 20 is engaged with the other frame 22, and the caster 3
What is necessary is just to transport or store using 8,40,42,44.

After use, the left and right frames 20,
The hanger 24 that has supported the connection 22 is separated from the other frame 22 and hangs long from the connection piece 60 of the one frame 20. After the locks 96 and 97 are released, the bottom plate 36 is folded and brought into close contact with the rear frame 6. . Thereafter, the lock 9 is locked using the lock holes 114 provided in the rear frame.
6 and 97, the left and right frames 20, 22 are spread at an appropriate angle, and the other bogies, which are also folded, enter the front in order from the front, so that the frames are closely attached to each other. A large number of transport vehicles can be loaded.

However, according to the present invention, in addition to the basic function as the article carrier trolley 116 having such a folding function, regardless of whether or not articles are loaded during operation using casters, By eliminating the cause of the overall noise generation that the conventional goods transport cart had,
It is intended to be able to operate in almost no noise situation.

That is, the rear frame 6 and the left and right frames 2
PVC pipes 46 and 48 are densely inserted into metal pipes 2, 8 and 10 constituting the pipes 0 and 22, respectively, from the through holes at the bottom of the hollow sections into the long vertical sections. I do. This not only reinforces the strength of the frame, but also prevents an acoustic phenomenon caused by the hollow portion of the metal pipe during operation.

Also, as shown in FIG.
Several hinges 16 and 18 for rotatably connecting and supporting 2
By inserting a bushing 56 made of a synthetic resin material between the metal pipes 8 and 10 of the left and right frames, the hinges 16 and 18 can be connected to the metal pipes 8 and 10 even if play occurs.
There is no possibility of direct contact with 10 and frictional noise caused thereby is prevented.

Further, the bushing 56 includes a hinge 16,
As in the case of FIG. 18, the left and right parts are separated from each other, and the engaging edges 54 and 55 are formed at the upper and lower ends thereof. There is no risk of detachment, and it can be used with confidence.

As shown in FIG. 3, the hanger 24 for connecting and supporting the front of the left and right frames 20 and 22 has one end connected to and fixed to the metal pipe 8 of one of the frames 20, as shown in FIG. Shaft bolt 62 on the connecting piece 60
The hook 64 at the other end is separably engaged with the engaging piece 68 of the synthetic resin material connected and fixed to the metal pipe 10 of the other frame 22. This allows
Similarly, the hanger 24 made of a metal material is connected to the left and right frames 20 and 2.
No direct contact with the metal pipes 8 and 10
Friction noise between metal materials by the hanger can be prevented.

The bottom plate 36 is constituted by covering a cover 86 made of a metal plate material on a frame 84, and the contact portion between the frame 84 and the cover 86 is made of sponge rubber 8.
By causing the metal members 8 to be separated from each other, frictional noise due to direct contact between the metal materials is prevented. In addition, the large number of through holes 92 in the cover 86 disperse noise due to vibration of the wide cover 86 during operation, and significantly reduce noise generated from the bottom plate 36.

Further, the hinges 32, 34 of the rear frame 6 for connecting and supporting the bottom plate 36 in a foldable manner are made of synthetic resin, and are locked in the lock holes 112, 114 when the bottom plate 36 is expanded and folded. For the tubes 96 and 97, a tube 98 made of a synthetic resin material is inserted or covered with a synthetic resin.
6 and support pieces 28 and 30 of left and right frames 20 and 22 supporting
On the upper surface of, a cushion rubber 104 made of a synthetic resin material is attached,
Even when the bottom plate 36 is expanded and folded, there is no possibility of direct contact between metals, so that noise can be prevented.

[0033]

As described above, according to the present invention, the metal pipes 2, 8, 10 constituting the respective frames 6, 20, 22 are provided.
Noise from several hinges 16 and 18 for connecting and supporting the left and right frames 20 and 22 so as to be folded, friction noise from a hanger 24 for connecting and supporting the front of the left and right frames 20 and 22, and noise from the bottom plate 36. It has a vibration noise and a friction noise between the frame 84 and the cover 86 constituting the bottom plate 36, and a connecting portion for rotatably connecting the bottom plate 36, and a fixing means when the bottom plate 36 is expanded and folded. All noises caused by the play and gaps caused by the folding construction of the carriage, such as friction noises between the locks 96 and 97 and the supporting pieces 28 and 30 which are in contact with the bottom plate 36 at the time of unfolding, are of course included. The sound of the metal pipe and the vibration noise of the bottom plate can be significantly reduced. Therefore, even in a large-scale distribution warehouse in which several hundred vehicles are used at the same time, a noise reduction effect far below the noise regulation value can be obtained, and the working environment can be improved and the possibility of the occurrence of occupational diseases of workers can be eliminated. In particular, since there is no danger of giving noise to surrounding residents, a distribution warehouse can be provided close to the sales area regardless of the residential area.
This can save logistics costs,
Since the necessary goods can be supplied immediately, there is no hindrance to business.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the present invention.

FIG. 2 is an exploded perspective view showing a hinge for connecting and supporting left and right side plates according to the present invention.

FIG. 3 is an exploded perspective view of a hanger used in the present invention.

FIG. 4 is an exploded perspective view of a bottom plate used in the present invention.

FIG. 5 is a partially enlarged perspective view of a support piece of the side frame according to the present invention.

[Explanation of symbols]

 2,8,10 Metal pipe 4,12,14 Metal rod 6 Rear frame 16,18 Hinge 20,22 Side frame 24 Hanger 26,28,30 Supporting piece 32,34 Hinge 36 Bottom plate 38,40,42,44 Caster 46 , 48 PVC pipe 50, 52 Shaft hole 54, 55 Engagement edge 56 Bushing 58, 66 Plate 60 Connection piece 62 Shaft bolt 64 Hook 68 Engagement piece 70 Engagement hole 72, 74 Coupling hole 76, 78 Engagement concave part 80, 82 engagement projection 84 frame 86 cover 88 sponge rubber 90 screw nail 92 through hole 94 lock assembly 96, 97 lock 98 tube 100, 102 hinge pin 104 buffer rubber 106 coupling projection 108 coupling hole

Claims (5)

[Claims] 1. A rear frame 6 having a plurality of hinges 16 in front of both sides of the rear frame 6.
Left and right frame 2 foldably connected with 18
0, 22; a hanger 24 for connecting and supporting these left and right frames 20, 22; and foldably connected on support pieces 26, 28, 30;
Also, the casters 38, 40, 42, 44 as moving means.
And a bottom plate 36 having a bottom plate 36 having a metal pipe 2, which constitutes each of the frames 6, 20, 22.
The PVC pipes 46 and 48 are inserted into the vertical portions of 8, 10 and the bottom plate 36 is configured so that they are separated by sandwiching sponge rubber between the frame 84 and the cover 86. The bottom plate 36 can be folded. Hinges 32,3 connected to
4 is made of synthetic resin, and locks 96 and 97 having fixing means for expanding and folding the bottom plate 36 are fitted with a synthetic resin tube 98 or covered with synthetic resin. Foldable goods carrier. 2. The left and right frames 20,
Hinges 18, 18 for foldably connecting and supporting 22
Is a folding article transport trolley comprising a bushing 56 made of a synthetic resin material interposed between metal pipes 8 and 10. 3. The left and right frames 20,
A hanger 24 for connecting and supporting the front of the frame 22 is connected to a connecting piece 60 of a synthetic resin material which is connected and fixed to one frame with a shaft bolt 62, and a hook 64 at the other end is connected and fixed to the other frame 22. Engaging piece 68 of synthetic resin material
A foldable article transport trolley, characterized in that it is adapted to be engaged with the trolley. 4. The folding device according to claim 1, wherein the cushioning rubber 104 is attached to the support pieces 28, 30 of the left and right frames 20, 22 that contact the bottom plate 36 when the bottom plate 36 is expanded. Type goods transport trolley. 5. The cover 8 according to claim 1, wherein the cover 8 of the bottom plate 36 is provided.
6. A foldable article carrier, wherein 6 is provided with several through holes 92 for dispersing vibration noise.