JP2017071336A - Travel means variable transport carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a travel means variable transport carriage capable of easily changing travel means to a caster or a crawler in response to a road surface state.SOLUTION: A travel means variable transport carriage is composed of a base 1 for placing a carrying object, a grip 2 provided on the base 1, a caster unit 13 or a crawler unit 3 detachably provided on an undersurface of the base 1. The caster unit 13 or the crawler unit 3 comprises installation plates 16(6) in an upper part of support legs 15(5) for rotatably supporting a wheel 14 or a crawler 4, and the base 1 is provided with a bolt hole 7 capable of out-fitting the installation plate 16 of the caster unit 13 and the installation plate 6 of the crawler unit 3, and the installation plate 16 of the caster unit 13 or the installation plate 6 of the crawler unit 3 is installed on the base 1 by using the bolt hole 7.SELECTED DRAWING: Figure 2

Description

  The present invention belongs to the technical field of hand carts for transporting objects to be transported, and more specifically, a traveling means variable transport cart that can flexibly cope with bad roads with poor road surface environments such as snowy road surfaces and soft road surfaces such as soil. About.

Conventionally, various transport carts that can smoothly travel on bad roads (road surfaces such as snow and soil) have been developed (see, for example, Patent Documents 1 and 2).
In particular, delivery trucks are widely used in parcel delivery companies due to traffic regulations and environmental considerations, and there are areas where the road surface environment changes significantly over the course of the year. There was a long-awaited transport cart that was easy to use throughout the year.

The transport cart according to Patent Document 1 is characterized in that a crawler belt (infinite track) is disposed at the lower part of the transport vehicle body, and by this crawler belt-type structure, road surfaces (so-called sandy roads such as beaches, gravel roads, grass roads, etc.) It can be transported smoothly even on rough roads (see claim 1 of the same document 1, paragraph [0018] etc. of the specification).
The transport cart according to Patent Document 2 employs a mechanism (endless track) used for grass skis in the traveling part, and this traveling mechanism can easily travel over a large level difference or travel along a curve. The vehicle can be driven silently regardless of the road surface condition (see claim 1 of the document 2, paragraphs [0009] and [0027] of the specification, etc.).

JP 2000-71999 A Japanese Patent Laying-Open No. 2015-127188

However, the transportation cart corresponding to the bad road environment according to Patent Documents 1 and 2 is inferior in turning performance, for example, on a normal road surface that is not a snowy road such as a summer season, compared to a conventional transportation cart with a caster (wheel). However, there were problems such as poor handling and over specs due to the added mechanism, and there was a current situation that could not be used throughout the year. However, there are problems of storage space and cost to prepare the carriages for normal use and rough roads separately.
Therefore, in the season when the road environment is good, such as summer, it is a transport cart with casters, and in the season when the road environment is bad, such as winter, it is a transport cart that has been changed from a caster to an endless track. Obviously, if a transport cart that can be changed can be realized, the problems of cost and storage location can be solved.

In addition, the conventional transport cart used by the courier can only hold the handle (handle) position in the folded state (0 degrees) and the upright position (90 degrees), and the delivery person faces the cart side. He was forced to push and pull the transport cart in a (forward-facing) position. Because, if the delivery truck pulls the carriage with the posture facing backward (backward) from the carriage side, the distance between the handle (delivery person) and the carriage body is short, so the delivery person's feet (especially the bag) This is because smooth traction, such as collision with the cart or being caught under the cart, is not possible.
However, if the load is bulky and it is difficult to secure visibility, or if it is not possible to make a U-turn such as on a snowy road, it is much smoother to pull the carriage in a backward position than in a forward position. Clearly, it would be even more beneficial if a transport cart capable of performing a smooth delivery operation and performing such a towing operation satisfactorily (smoothly) could be realized.

The present invention has been devised in view of the above-described problems of the background art, and the object of the present invention is to enable the traveling means to be easily changed to a caster or an endless track depending on the road surface condition. It is in providing a means variable transport cart.
It is another object of the present invention to provide a travel means variable transport cart that can perform pulling operation well as well as push and pull the transport cart in a forward-facing posture.

As means for solving the problems of the background art, the traveling means variable transport carriage according to the invention described in claim 1 includes a base for placing a material to be transported, a handle provided on the base, , A traveling means variable transport carriage comprising a caster unit or an endless track unit detachably provided on the lower surface of the base,
The caster unit includes a mounting plate on an upper portion of a support leg that rotatably supports a wheel, and the endless track unit includes an attachment plate on an upper portion of a support leg that rotatably supports the endless track. The base is provided with a bolt hole to which the mounting plate of the caster unit and the mounting plate of the endless track unit can be externally attached, and using the bolt hole, the mounting plate of the caster unit or the endless track unit An attachment plate is attached to the base.

The invention described in claim 2 is the traveling means variable transport carriage according to claim 1, wherein the mounting plate of the caster unit and the mounting plate of the endless track unit have a common bolt hole provided in the base. It is characterized by being attached to the base using.
According to a third aspect of the present invention, in the traveling means variable transport cart according to the first or second aspect, the bolt holes are provided at substantially four corner positions of the base.

  The invention described in claim 4 is the traveling means variable transport cart according to any one of claims 1 to 3, wherein the base is provided with a mounting plate on a frame member having the bolt hole. It is characterized by becoming.

According to a fifth aspect of the present invention, in the traveling means variable transport carriage according to the fourth aspect, the frame member of the base is provided in a vertical frame provided in the traveling direction and in a left-right direction substantially orthogonal to the traveling direction. The horizontal frame is assembled in a cross-beam shape in plan view, the horizontal frame is formed in a C-shaped cross section that opens downward, and bolt holes for attaching the mounting plates to the left and right ends of the horizontal frame are formed. Being provided penetrating vertically,
The mounting plate is provided with a bolt hole that matches the bolt hole, and the caster unit or the endless track unit is attached to the base by fastening the bolt passed through the matching bolt hole with a nut. It is characterized by that.

The invention described in claim 6 is the traveling means variable transport cart according to any one of claims 1 to 5, wherein the endless track unit is configured by an endless track, a support leg, and a mounting plate.
The endless track comprises at least an endless track and an inner frame that holds the shape of the endless track from the inside;
The support legs are substantially downward U-shaped with legs that sandwich the endless track, and at least two of the support legs are arranged at a predetermined interval so as to sandwich the endless track with the legs, and the inner frame is connected to the predetermined frame. At least two horizontal shafts penetrating at intervals are pivotally supported by the legs to support the endless track rotatably,
The mounting plate is provided on each of the upper surfaces of the two support legs, and the mounting plate is provided with a bolt hole at a position coinciding with the bolt hole provided in the base.

  The invention described in claim 7 is the traveling means variable transport cart according to any one of claims 1 to 6, wherein the handle is provided on a base via a folding bracket, and the base is supported by the folding bracket. On the other hand, it is characterized in that it can be held at each position of a position where it falls down, a position upright at approximately 90 degrees, and one or more positions exceeding 90 degrees.

The invention described in claim 8 is characterized in that, in the travel means variable transport carriage described in any one of claims 1 to 7, the handle includes an expansion / contraction mechanism that expands and contracts in the vertical direction.
A ninth aspect of the present invention is the traveling means variable transport carriage according to any one of the first to eighth aspects, wherein the transported object is prevented from being displaced at a position opposite to the handle on the base. Is characterized in that it is installed detachably.

The invention described in claim 10 is the traveling means variable transport cart according to any one of claims 1 to 9, wherein the support leg and the mounting plate are made of synthetic resin.
The invention described in claim 11 is the traveling means variable transport carriage according to any one of claims 1 to 10, wherein the mounting plate is in a state in which a part thereof protrudes from the left and right of the base in a plan view. It is attached to a stand.

The traveling means variable transport cart according to the present invention has the following effects.
(1) By exchanging only the traveling means using the base (chassis body) and the handle in common, it can be easily replaced with a caster type transport cart or an endless track type transport cart according to the road surface condition. More specifically, in the season when the road surface environment is good, such as summer, use a cart with a caster, and in the season when the road surface environment is bad, such as winter, replace it with a cart that has been changed from a caster to an endless track with as little work as possible. Since the work can be done easily, the problem of securing the storage location is solved and it is possible to carry out at a lower cost compared to the case where the carriages for normal use and rough roads are prepared separately. Realistic transport cart can be realized.
(2) Since the handle can be fixedly held at a position tilted toward the front side, the distance between the handle and the base can be increased, and the delivery person can face away from the carriage side in a rearward posture. Even if the transport cart is towed, smooth towing can be performed without causing the deliveryman's feet to collide with the cart or to be caught below the cart. Further, when traveling on a level difference (unevenness on the road surface) on a rough road, it is possible to easily lift the carriage front part (front wheel part) on the basis of the lever principle and perform smooth travel across the level difference.
(3) The height of the handle can be adjusted flexibly according to the height of each individual delivery person, so that the delivery person can carry in a comfortable posture, reducing the delivery person's fatigue and reducing the labor load. It also leads to reduction.
(4) In short, according to the present invention, the traveling means can be easily changed according to the road surface condition, and the road surface step can be easily lifted by changing the angle of the handle and easily lifting the front part of the carriage. If the load is bulky and the U-turn is not possible, it is possible to reverse the posture and switch to a good towing work, and the delivery person can carry the work in an easy posture, etc. A universal transport cart can be realized.

It is a perspective view which shows the conveyance trolley at the time of implementing a traveling means by an endless track type among the traveling means variable trolley | bogie concerning this invention. FIG. 2 is an exploded perspective view of FIG. 1. In addition, in order to show that the present invention is a traveling means variable carriage, two caster units (13) are additionally shown in the drawing. A is a front view showing the endless track unit, and B is a side view thereof. FIG. 4A is an exploded perspective view showing a transport cart when the travel means is a caster type of the travel means variable transport cart according to the present invention, and B is an enlargement of an X portion (caster unit) indicated by A. FIG. A is an enlarged view of the folding bracket (17) shown in FIGS. 1, 2, and 4A, and B is a perspective view showing the handle frame portion (2a). FIG. 1A is a perspective view showing a state in which the handle angle is changed to the near side with respect to FIG. 1, and B is a state in which an accommodation box that accommodates a transported object is attached in a state in which the handle angle is further changed to an obtuse angle. FIG. It is a perspective view which shows the state which extended the position of the handle higher about FIG.

A traveling means variable transport cart according to the present invention includes a base for placing an object to be transported, a handle provided on the base, and a caster unit or an endless track unit provided detachably on the lower surface of the base. The caster unit includes a mounting plate on an upper portion of a support leg that rotatably supports a wheel, and the endless track unit includes an attachment plate on an upper portion of a support leg that rotatably supports the endless track. The base is provided with a bolt hole to which the mounting plate of the caster unit and the mounting plate of the endless track unit can be externally attached, and using the bolt hole, the mounting plate of the caster unit or An endless track unit mounting plate is mounted on the base.
In short, the traveling means variable transport cart according to the present invention is a caster type transport cart according to the road surface condition by exchanging only the travel means with the chassis main body (base) in common as shown in FIG. Alternatively, it is based on the technical idea of an endless track type transport cart.
Hereinafter, in the first embodiment, a description will be given of a transport cart that employs an endless track as a traveling means, and in the second embodiment, a transport cart that employs a caster will be described.

1 to 3 show an embodiment of a traveling means variable transport cart according to the present invention.
The traveling means variable transport cart 10 according to the first embodiment is an endless track type transport cart, and a base 1 for placing an object to be transported (not shown) and a handle provided on the base 1. 2 and an endless track unit 3 detachably provided on the lower surface of the base 1.
The endless track unit 3 includes a mounting plate 6 on an upper portion of a support leg 5 that rotatably supports the endless track 4, and the base 1 can be externally attached to the endless track unit 3. A bolt hole 7 is provided, and the mounting plate 6 of the endless track unit 3 is attached to the base 1 using the bolt hole 7.
Incidentally, reference numeral 13 in FIG. 2 denotes a caster unit. This will be described in Example 2.

As an example, the base 1 according to the present embodiment is provided with a mounting plate (for example, a resin board) 9 on a frame member 8 provided with the bolt holes 7.
Specifically, the frame member 8 is made of metal, and is provided with two vertical frames (e.g., elongated square bars) 8a and 8a provided in parallel to the traveling direction, and parallel to the left-right direction substantially orthogonal to the traveling direction. The two horizontal frames 8b and 8b provided in the frame are assembled in a cross-beam shape in a plan view, and the horizontal frame 8b is formed in a C-shaped cross section that opens downward, and is formed at the left and right ends of the horizontal frame 8b. Bolt holes 7 for attaching the mounting plate 6 are provided penetrating in the vertical direction. Further, the mounting plate 6 is provided with a bolt hole 6a coinciding with the bolt hole 7, and a bolt passed through the bolt bolts 7 and 6a that coincides is fastened with a nut (not shown). An endless track unit 3 is attached to the base 1.

In this embodiment, the frame member 8 that constitutes the base 1 is assembled in the most rational cross-girder shape in consideration of the strength, cost, and weight reduction of the member. However, it is not limited to the cross-girder shape, and any shape that can hold the mounting plate 9 placed thereon in a stable state may be used. For example, three or more vertical frames 8a or horizontal frames 8b constituting the frame member 8 can be implemented.
In consideration of the strength of the member, stability during running by lowering the center of gravity, and compactness, the frame member 8 penetrates the lateral frame 8b through the side surface of the vertical frame 8a, and the frame 8a, 8b The crossing is carried out in a cross-beam shape by bolting. However, the present invention is not limited to this. The horizontal frame 8b may be provided on the upper surface or the lower surface of the vertical frame 8a so as to form a cross beam or the like.
The placement plate 9 has a groove 9a formed on the back surface thereof for receiving the vertical frame 8a over the entire length. This is a device for mounting the mounting plate 9 not only on the vertical frame 8a but also on the upper surface of the horizontal frame 8b in a surface touch state, and improving the stability of the mounting plate 9 and mounting work such as bolt joining. Contribute to the efficiency improvement. In addition, a device for making a stepped hole so that a bolt for joining to the frame member 8a or the like does not protrude to the upper surface of the mounting plate 9 is appropriately performed.

The horizontal frame 8b can be implemented by a flat plate, but in the present embodiment, it is implemented by a metal plate formed in a C-shaped cross section that opens downward. The significance of this is that when it is implemented with a flat plate or the like, it is customary to use a four-point fastening with the mounting plate 6 of the endless track unit 3, but the mounting strength between the horizontal frame 8b and the mounting plate 6 is further improved. Let the bolts be fastened at two points.
That is, two bolt holes 7 are provided at both ends in the left-right direction of the horizontal frame 8b. Further, when viewed from the hollow cross-sectional direction of the horizontal frame 8b, the upper surface and the cross-section C are formed at both ends in the width direction. It is disposed (perforated) so as to penetrate the letter-shaped protruding portion (claw portion).
On the other hand, the mounting plate 6 of the endless track unit 3 is made of a synthetic resin having a predetermined thickness approximate to the hollow cross-sectional shape of the horizontal frame 8b, which is provided with bolt holes 6a, 6a at positions corresponding to the bolt holes 7, 7. This is slid and positioned in the hollow cross section of the horizontal frame 8b, and bolted using the matched bolt holes 7 and 6a, and attached to the horizontal frame 8b and eventually the base 1.
Then, since the synthetic resin mounting plate 6 having the predetermined thickness is firmly tightened by the upper and lower face members of the lateral frame 8b having the C-shaped cross section, a sufficiently high holding force can be obtained even with two bolts. Can be realized. Therefore, when changing to a caster-type transport cart, which will be described later, the number of members and man-hours can be almost halved compared to the case of carrying out with four points, so that cost reduction and work efficiency can be realized. .

The configuration of the endless track unit 3 will be described. The endless track unit 3 according to this embodiment includes the endless track 4, support legs 5, and the mounting plate 6.
The endless track 4 includes at least an endless track band 4a and an inner frame 4b that holds the shape of the endless track band 4a from the inside (see FIG. 3). This endless track 4 is obtained by improving a commercially available glass ski for application to the present invention. As an improvement, a hole having a required size penetrating in a horizontal direction is formed in a portion of the inner frame 4b where the support leg 5 is attached.
Since the structure of the endless track 4a is well known, detailed description thereof will be omitted. Incidentally, reference numeral 4c in FIG. 3 indicates an endless rail, reference numeral 4d indicates a roller, and reference numeral 4e indicates an element that supports a plurality of rollers 4d. Reference numeral 4f denotes a belt that holds the elements 4e at equal intervals.

The support leg 5 is made of a synthetic resin in consideration of rust prevention, and uses a support leg of a caster made of a synthetic resin reinforced with a glass fiber reinforced with a particularly high rigidity, and is used for a conventional general caster. The same form as the support legs is adopted. That is, the horizontal frames 8b and 8b are arranged at a predetermined interval so as to sandwich the endless track 4 between the legs 5a and 5a. At least two (two in this embodiment) are arranged at positions substantially coincident with the interval, and at least two horizontal shafts 11 that penetrate the inner frame 4b with the predetermined interval are respectively provided to the legs 5a and 5a. The endless track 4 is rotatably supported by the shaft. Incidentally, reference numeral 12 in the figure denotes a nut.
The mounting plate 6 is mounted on the upper surfaces of the two support legs 5, and as described above, the bolt holes 6 a are provided at positions corresponding to the bolt holes 7 provided on the base 1 side.
Incidentally, in the present embodiment, a device is provided in which a part of the mounting plate 6 is attached to the base 1 in a state of protruding from the left and right of the base 1 in plan view. This is because the resin portion of the mounting plate 6 serves as a buffer material by protruding outward from the base 1 and contributes to the protection of the base 1 (the frame member 8 and the mounting plate 9). There is also an advantage to prevent damage to people and buildings.

  Thus, the endless track-type transport cart 10 according to the first embodiment has a base 1 (cart body) provided with a handle 2 rising from one end portion in the traveling direction, in the hollow cross section at both end portions of the lateral frames 8b and 8b. The mounting plates 6 and 6 of the endless track unit 3 are slid and inserted from both sides, and are firmly joined by bolting using the bolt holes 7 of the matching horizontal frame 8b and the bolt holes 6a of the mounting plate 6. Assembled into.

In addition, the example of illustration shows only the best embodiment. In short, the present invention can freely change only the traveling means from the caster type to the endless track type and from the endless track type to the caster type while using the base 1 in common. Any configuration is possible.
For example, in the present invention, the base 1 is a rectangular board having necessary and sufficient strength and rigidity in place of the structure in which the mounting plate 9 is provided on the frame member 8, and the board has substantially four corners. Bolt holes 7 penetrating in the vertical direction are drilled at the positions, and the two mounting plates 6 and 6 of the endless track unit 3 arranged in parallel on the left and right sides using the bolt holes 7 are fastened by four points respectively. The structure formed by bolting is also included.
The traveling means variable transport cart according to the first embodiment is further devised to make it easy for the delivery person to pull in a backward-facing posture by using a folding bracket 17 in which the angle of the handle 2 can be set in a wide range. However, this point will be described in the third embodiment.

FIG. 4 shows an embodiment of the traveling means variable transport cart according to the present invention.
In the traveling means variable transport cart 10 ′ according to the second embodiment, the base 1 and the handle 2 according to the first embodiment are used as they are (in common), and only the traveling means is changed from the endless track type to the caster type. (See also FIG. 2).

That is, the caster-type transport cart 10 ′ according to FIG. 4 includes a base 1 for placing an object to be transported (not shown), a handle 2 provided on the base 1, The caster 13 is detachably provided on the lower surface.
The caster unit 13 includes a mounting plate 16 on an upper portion of a support leg 15 that rotatably supports the wheel 14, and the base 1 has a bolt hole 7 to which the mounting plate 16 of the caster unit 13 can be externally attached. The mounting plate 16 of the caster unit 13 is attached to the base 1 using the bolt hole 7.
That is, the mounting plate 16 of the caster unit 13 and the mounting plate 6 of the endless track unit 3 according to the present invention are attached to the base 1 using the common bolt hole 7 provided in the base 1. By doing so, we are trying to rationalize structural design, replacement work, etc.
Since the frame member 8 and the mounting plate 9 constituting the base 1 are the same as those of the first embodiment, the same reference numerals are given and the description thereof is omitted (the paragraphs [0020], [0021], and [0022]). ]).

The caster unit 13 includes a wheel 14, a support leg 15, and the mounting plate 16. The caster unit 13 has a substantially downward U-shape including leg portions 15 a and 15 a sandwiching the wheel 14, and a horizontal through which the core of the wheel 15 penetrates. A shaft is pivotally supported by the leg portions 15a and 15a to support the wheel 14 rotatably. Incidentally, as an example, the caster unit 13 according to the present embodiment has a front wheel portion implemented by a free wheel (a free caster) and a rear wheel portion implemented by a fixed wheel (fixed caster).
In addition, since the structure of the said support leg 15 and the attachment board 16 is implemented with the material and form similar to the said Example 1, the description is abbreviate | omitted (refer the said paragraph [0024]).

  Thus, the caster-type transport cart 10 'according to the second embodiment is provided on the base 1 (cart body) provided with the handle 2 that rises from one end portion in the traveling direction, in the hollow cross section at both end portions of the horizontal frames 8b and 8b. From both sides, the mounting plates 16 and 16 of the caster unit 13 are slid and inserted, and the bolt hole 7 of the horizontal frame 8b and the bolt hole of the mounting plate 16 (refer to the bolt hole 6a in FIG. 2 are referred to). ) To be firmly assembled by bolting.

In addition, the example of illustration shows only the best embodiment. In short, the present invention freely changes only the traveling means from the endless track type to the caster type and from the caster type to the endless track type with the base 1 in common. Any configuration is possible.
For example, in the present invention, in the same manner as in the first embodiment, the base 1 has a rectangular shape having necessary and sufficient strength and rigidity instead of the configuration in which the mounting plate 9 is provided on the frame member 8. Bolt holes 7 penetrating in the vertical direction are formed in substantially four corner positions of the board, and the mounting plates 16 of the caster unit 13 are bolted using four bolts or the like using the bolt holes 7. Configuration is also included.
Since the traveling means variable transport cart according to the second embodiment also uses the handle 2 that is common to the first embodiment, naturally, by using the folding bracket 17 that can set the angle of the handle 2 in a wide range, A device for facilitating the operation of pulling in a backward-facing posture is given to this point, which will be described in Example 3.

In the third embodiment, the structure and operation effect of the variable angle mechanism using the folding bracket 17 which is a component common to the traveling means variable transport carts 10 and 10 'described in the first and second embodiments will be described.
The handle 2 according to the first and second embodiments is provided on the base 1 (in this embodiment, the vertical frame 8a) via the folding bracket 17 so that FIG. 5A can be easily understood. 1 in addition to the position of lying down, the position standing upright at approximately 90 degrees, and one or more (two in the present embodiment) positions exceeding 90 degrees (four in the present embodiment). It is implemented in a configuration that can be fixedly held.

As an example, the folding bracket 17 is open in the direction of the vertical frame 8a and is formed in a substantially U-shape in plan view that can receive the frame portion 2a of the handle 2, and has both side walls (same shape and size) 17a, 17a. The lower end is attached to the base end of the vertical frame 8a by bolting, while the handle 2 is centered on a hinge pin 18 that passes horizontally through the lower end of the frame 2a received in the side walls 17a, 17a. It is provided so that rotation is possible.
Further, both side walls 17a and 17a of the folding metal fitting 17 are provided with substantially fan-shaped holes 17b and 17b having the same shape and the same size, which can receive and rotate the positioning flat bar 19, respectively. The positioning flat bar 19 inserted horizontally through the frame portion 2a of the handle 2 and inserted into the substantially fan-shaped holes 17b and 17b is always in the upper direction of the handle 2 by a spring 20 having one end fixed to the handle 2 side. When the stepping portion 19a of the positioning flat bar 19 is stepped on with a foot, the handle 2 is detached from the notch groove 17c, and the handle 2 is rotated. Incidentally, reference numeral 2b in FIG. 5 indicates a vertical hole into which the positioning flat bar 19 is inserted and which allows the positioning flat bar 19 to move in the vertical direction.
Furthermore, the positioning flat bar 19 has an upper end formed in a wedge shape (tapered shape), and the substantially fan-shaped hole 17b has a portion corresponding to a plurality of preset angles (positions) of the handle 2. The same number of notch grooves 17c into which the wedge-shaped upper end portions are fitted are provided and can be fixedly held at each position.

  In the operation of the variable angle mechanism having the above configuration, when the delivery person steps on the stepping portion 19a of the positioning flat bar 19 from above, the fitting state (lock) between the positioning flat bar 19 and the notch groove 17c is released, The angle change operation of the handle 2 becomes possible. Then, when the handle 2 is rotated to an angle desired by the delivery person, the wedge portion of the positioning flat bar 19 is automatically fitted into the notch groove 17c by the force of the spring 20 and is locked. In addition, in the position (angle 0 degree) where the said handle 2 lies down, since the step part 19a cannot be stepped on, the notch groove 17c is not provided (refer FIG. 5A).

  The significance of using the plate-shaped positioning flat bar 19 that is long in the vertical direction will be described. Compared with the round bar, the second moment of the cross section in the direction in which the force acts is lighter and the deflection can be suppressed. . Moreover, since it has an elongated shape, the number of positions to be fixed and held can be increased. Since the wedge portion has a shape characteristic to surely enter and bite into the notch groove 17c, it is possible to suppress the situation where the fixed holding state is released due to sudden impacts without rattling.

According to the variable angle mechanism having the above-described configuration, for example, as shown in FIGS. 6A and 6B, when the handle 2 is tilted toward the delivery person, the handle 2 (delivery person) and the base 1 are inevitably disposed. Can be separated. Therefore, even if the operator pulls the transport carriage in a posture facing backward (backward) from the cart side, the operator's feet may collide with (contact with) the cart or be caught below the cart. Smooth traction without any problems can be achieved.
In addition, when the handle 2 is in an upright state when traveling on a step (unevenness on the road surface) on a rough road, the impact of overcoming is directly applied to the base portion of the handle 2 (the lower end of the frame portion 2a). ) And the bending moment increases, the attachment portion of the handle 2 may be damaged, and a considerable force is required. In this regard, according to the angle variable mechanism having the above-described configuration, the handle 2 is preliminarily tilted to the front side of the delivery person, so that the bending moment is inevitably reduced, and the delivery person can use the lever principle. The front part of the carriage can be easily lifted with a force that does not impose a burden, and a smooth transport operation can be realized. It also contributes to preventing damage to the transport cart and improving durability.
6 and 7 show the endless track type carriage, but the same effect can be obtained by the caster type.

  By the way, the delivery company may use the transporting cart by winding and fixing the storage box L as shown in FIG. 6B around the handle 2 upright using the hook-and-loop fastener 22. However, as described above, when the handle 2 is tilted toward the front side of the delivery person and fixedly held, this method cannot be adopted. Therefore, in the present invention, as shown in FIGS. 6A and 6B, the pipe through holes 9b are arranged in a well-balanced manner at the front end portion (position opposite to the handle 2) of the mounting plate 9 constituting the base 1. The position slip prevention pipe 21 is inserted into the pipe passage hole 9b and is erected, and the surface fastener 22 of the storage box L is wound around and fixed to the standing position slip prevention pipe 21. .

Furthermore, as shown in FIG. 7, the traveling means variable transport cart according to the present invention can extend and contract the handle 2 in the vertical direction to finely adjust the height of the handle 2 according to the height of the delivery person. (See contrast with FIG. 1).
Up to now, considering the compactness at the time of folding, handles 2 can be stored in a two-stage system (nesting type), and there are some carts that can be deployed, but the height of the handle 2 can be reduced depending on the height of the delivery person. There was no trolley that could be adjusted. The height of the handle 2 has been mainly about 80 cm than before, but it has been neglected as it is, despite the fact that the average height has grown by about 6 cm over the past 50 years. However, the trolley that the deliveryman keeps pushing during working hours is a part that should be adjusted according to the height of the deliveryer.
Therefore, in the present invention, as shown in FIG. 5B, a vertically long notch groove 2c is formed in the upper end portion of the frame portion 2a forming the substantially lower half portion of the handle 2, and the inside of the frame portion 2a is slid up and down. When the upper frame portion 2a ′ that forms the substantially upper half portion that moves is positioned at a desired height, the periphery of the notch groove 2c is tightened and tightened with a tightening fitting 23, whereby the upper frame portion 2a ′ is A means to fix is adopted. According to this means, once the fastening bracket 23 is loosened, the upper frame portion 2a ′ is released from the restraint and can be slid up and down, and when the fastening bracket 23 is tightened, the upper frame portion 2a ′ is positioned and fixed. Therefore, the height of the handle 2 can be finely adjusted with flexibility and reliability.

  As mentioned above, although Example 1-4 was demonstrated based on drawing, this invention is not this limitation, In the range which does not deviate from the technical idea, the range of the design change normally performed by those skilled in the art and the variation of application is included. I will mention that just in case.

DESCRIPTION OF SYMBOLS 1 Base 2 Handle 2a Frame part 2a 'upper frame part 2b Vertical hole 2c Notch groove 3 Endless track unit 4 Endless track 4a Endless track belt 4b Inner frame 4c Endless rail 4d Roller 4e Element 4f Belt 5 Support leg 5a Leg 6 Mounting plate 6a Bolt hole 7 Bolt hole 8 Frame member 8a Vertical frame 8b Horizontal frame 9 Placement plate 9a Groove 9b Pipe passage hole 10 Traveling means variable transport cart (endless track type transport cart)
10 'Transporting vehicle with variable travel means (Caster-type transporting cart)
11 horizontal shaft 12 nut 13 caster unit 14 wheel 15 support leg 15a leg 16 mounting plate 17 folding bracket 17a side wall 17b substantially fan-shaped hole 17c notch groove 18 hinge pin 19 positioning flat bar 19a foot tread 20 spring 21 misalignment prevention pipe 22 hook-and-loop fastener 23 fastening bracket L accommodation box

Claims (11)

A traveling means variable transport carriage comprising a base for placing an object to be transported, a handle provided on the base, and a caster unit or an endless track unit detachably provided on the lower surface of the base. ,
The caster unit includes a mounting plate on an upper portion of a support leg that rotatably supports a wheel, and the endless track unit includes an attachment plate on an upper portion of a support leg that rotatably supports the endless track. The base is provided with a bolt hole to which the mounting plate of the caster unit and the mounting plate of the endless track unit can be externally attached, and using the bolt hole, the mounting plate of the caster unit or the endless track unit A traveling carriage with variable travel means, wherein an attachment plate is attached to the base.   The traveling means according to claim 1, wherein the mounting plate of the caster unit and the mounting plate of the endless track unit are attached to the base using a common bolt hole provided in the base. Variable transport cart.   The travel means variable transport cart according to claim 1, wherein the bolt holes are provided at substantially four corner positions of the base.   The travel means variable transport cart according to any one of claims 1 to 3, wherein the base is provided with a mounting plate on a frame member provided with the bolt holes. In the frame member of the base, a vertical frame provided in the traveling direction and a horizontal frame provided in the left-right direction substantially orthogonal to the traveling direction are assembled in a cross-beam shape in plan view, and the horizontal frame is downward A bolt hole for attaching the mounting plate to the left and right ends of the horizontal frame is provided penetrating in the vertical direction.
The mounting plate is provided with a bolt hole that coincides with the bolt hole, and a bolt passed through the matching bolt hole is fastened with a nut, whereby the caster unit or the endless track unit is attached to the base. The traveling means variable transport cart according to claim 4, wherein The endless track unit is composed of an endless track, a support leg and a mounting plate,
The endless track comprises at least an endless track and an inner frame that holds the shape of the endless track from the inside;
The support legs are substantially downward U-shaped with legs that sandwich the endless track, and at least two of the support legs are arranged at a predetermined interval so as to sandwich the endless track with the legs, and the inner frame is connected to the predetermined frame. At least two horizontal shafts penetrating at intervals are pivotally supported by the legs to support the endless track rotatably,
The mounting plate is provided on an upper surface of each of the two support legs, and the mounting plate is provided with a bolt hole at a position coinciding with the bolt hole provided in the base. The traveling means variable transport cart according to any one of Items 1 to 5.   The handle is provided on a base via a folding metal fitting, and the folding metal fitting is provided at a position where it falls on the base, an upright position at approximately 90 degrees, and one or more positions exceeding 90 degrees. It is set as the structure which can be hold | maintained at each position, The travel means variable conveyance trolley | bogie as described in any one of Claims 1-6 characterized by the above-mentioned.   The travel handle variable transport cart according to any one of claims 1 to 7, wherein the handle includes a height adjusting mechanism that expands and contracts in a vertical direction.   The travel means according to any one of claims 1 to 8, wherein a pipe for preventing misalignment of a transported object is detachably installed at a position opposite to the handle on the base. Variable transport cart.   The travel means variable transport cart according to any one of claims 1 to 9, wherein the support leg and the mounting plate are made of synthetic resin.   The travel means variable transportation according to any one of claims 1 to 10, wherein a part of the mounting plate is attached to the base in a state of protruding from the left and right of the base in plan view. Trolley.

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