JP2003165698A - Attachment for fork-lift truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive attachment for a fork-lift truck with favorable operability capable of efficiently carrying earth and sand or the like. <P>SOLUTION: The attachment for the fork-lift truck is provided with a base part 2 formed so it can be attached to a fork 63, a bucket 3 mounted on the base part 2, and a driving mechanism 4 arranged in the base part 2. The bucket 3 is formed in a box like shape opened at least in a top face, and a tip positioned in a tip side of the fork 63 in a bottom is turnably attached to a tip side of the base part 2. The driving mechanism 4 is provided with a support part 31 erected in a rear end side of the base part 2 and having a supporting point on an upper end, and a wire rope 33 with one end fixed in a position lower than a pulley 32 of the support part 31 in a back face side of the bucket 3 and another end fixed to a predetermined portion in a body 62 of the fork-lift truck 61 via the pulley 32. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forklift attachment that can be mounted on a fork of a forklift.

[0002]

2. Description of the Related Art As shown in FIG. 11, as a forklift attachment for expanding the function of a forklift, a bucket-shaped forklift attachment 51 (hereinafter referred to as "attachment 51") used for removing and transporting dirt and the like has been conventionally used. Known from. The attachment 51 is formed into a box-shaped bucket having an open upper surface and a front surface, and a fork mounting portion (horizontal portion) of the forklift 61 (see FIG. 12) attached to the bottom portion of the bucket so that the bucket can be inserted. And a tubular connecting portion.

This attachment 51 is used as follows. For example, when moving the soil on the ground, first, as shown in FIG. 12, the fork of the forklift 61 is inserted into the connecting portion from the rear of the attachment 51, and then the connecting portion and the fork are fixed using bolts or the like. To do. Next, the forklift 61 is moved forward while rubbing the ground with the tip of the bucket of the attachment 51,
Push the sand into the bucket. Then the soil is scooped by raising the fork. Then, the forklift 61 is moved to a predetermined place while maintaining the state in which the fork is raised. Then, the bucket of the attachment 51 is tilted by tilting the mast for supporting the fork forward. As a result, the earth and sand loaded in the bucket slide down, and the earth and sand are moved to a predetermined place.

[0004]

However, the conventional attachment 51 has the following problems. That is, in this attachment 51, in order to lower the earth and sand loaded in the bucket onto the ground or the like, it is necessary to tilt the mast forward as described above. However, in general, since the tiltable range of the mast is extremely narrow, the maximum tilt angle of the bucket is necessarily small. Therefore, when unloading the loaded earth and sand, the bucket cannot be tilted to an angle where the earth and sand naturally slide down due to its own weight, so the earth and sand remain in the bucket, and in some cases it is necessary to scrape it out using a scoop or the like. Therefore, the conventional attachment 51 has a problem that work efficiency is low. Further, it is possible to apply vibration or shock to the attachment 51 to remove the earth and sand remaining in the bucket, but at that time, it is necessary to violently move the fork up and down or move the forklift 61 back and forth. Therefore, there arises a problem that the forklift 61 is broken or the attachment 51 is damaged.

On the other hand, it is conceivable to adopt a structure in which a power source is mounted on the attachment and a mechanism for tilting the bucket by the power source is provided. However, when this configuration is adopted, the mechanism of the attachment itself becomes complicated, the operation becomes complicated, and the price also rises.

The present invention has been made in view of the above problems, and a main object of the present invention is to provide an attachment for a forklift which is inexpensive, has good operability, and is capable of efficiently carrying earth and sand.

[0007]

In order to achieve the above object, an attachment for a forklift according to a first aspect of the present invention is provided with a base portion which can be mounted on a fork of a forklift, and a bucket which is placed on the upper surface of the base portion. And a drive mechanism disposed on the base portion, the attachment being for a forklift, wherein the bucket is formed in a box shape with at least an upper surface thereof open, and at the bottom portion of the fork. A distal end portion located on the distal end side is rotatably attached to the distal end portion of the base portion, the drive mechanism is erected on the rear end side of the base portion, and a columnar member having a fulcrum at the upper end thereof; One end of the bucket is fixed to a position below the fulcrum of the columnar member on the back surface side of the bucket, and the fork is provided via the fulcrum. Rope other end to a predetermined site in the body of the shift is fixed, and is configured with one or a chain and a belt.

A forklift attachment according to a second aspect of the present invention is the attachment for the forklift according to the first aspect, wherein the fulcrum is a pulley that is rotatably attached to the columnar member.

An attachment for a forklift according to a third aspect of the present invention is a base portion which is formed so that it can be mounted on a fork of a forklift truck, a bucket placed on the upper surface of the base portion, and a drive mechanism arranged on the base portion. An attachment for a forklift, comprising: a bucket, wherein the bucket is formed in a box shape having at least an upper surface thereof opened, and a tip portion of the bottom portion located on a tip side of the fork is rotatable. The drive mechanism is attached to the front end portion of the base portion, and the drive mechanism includes a columnar member erected on the rear end side of the base portion, and an arm whose center portion is rotatably attached to the upper end portion of the columnar member. When,
Any one of a rope, a chain, and a belt, one end of which is fixed to a position below the rotation axis of the arm of the columnar member on the back side of the bucket and the other end of which is fixed to one end of the arm. And one of a rope, a chain, and a belt, one end of which is fixed to a predetermined portion of the main body of the forklift and the other end of which is fixed to the other end of the arm. .
In the present invention, the term "rope" is a concept including a type formed by connecting a plurality of metal rods.

A forklift attachment according to a fourth aspect is the attachment for a forklift according to any one of the first to third aspects, in which the base portions are spaced in parallel from each other, and the mounting portions of the pair of forks are respectively arranged. It is configured to include a pair of cylindrical long casings that can be inserted and a connecting portion that mutually connects the pair of cylindrical long casings.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the attachment for a forklift according to the present invention will be described below with reference to the accompanying drawings.

First, the structure of the forklift attachment 1 (hereinafter referred to as "attachment 1") will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the attachment 1 can be attached to a forklift 61 (see FIG. 7) having a fork 63 having a pair of mounting portions (horizontal portions) to remove and transport dirt and the like. Is configured. Specifically, the attachment 1 has a base portion 2 which is formed so as to be able to be inserted and fixed to a mounting portion of the fork 63, a bucket 3 which is mounted on an upper surface of the base portion 2, and a bucket 3 which can be tilted. And a drive mechanism 4 configured and disposed on the base portion 2.

As shown in FIG. 3, the base portion 2 includes a pair of cylindrical elongated casings 11 and 11 formed in a cylindrical shape by a metal (steel or the like) square pipe, and a cylindrical elongated casing. Two connecting pipes (connecting parts) 12a made of metal (steel or the like) for connecting 11 and 11 while keeping them separated from each other in parallel to each other,
And 12b. In addition, a rotating shaft 13 made of metal (steel or the like) and formed in a cylindrical shape is attached to one end of the cylindrical elongated housing 11. In this case, the cylindrical elongated housing 11 has one end on the mounting position side of the rotating shaft 13 closed and the other end open. Further, in the tubular elongated housing 11, a part of the upper surface on the opening side is cut out, and
Bolt penetration holes 15 and 15 are formed on both side surfaces of the notched portion. Therefore, when the attachment 1 is attached to the forklift 61, the base end portion (vertical portion) of the fork 63 is inserted into the opening of the tubular elongated casing 11 and then the tubular end of the fork 63 is inserted into the tubular elongated portion. As shown in FIG. 8, the attachment 1 is inserted into the fork 6 by inserting the bolt toward the closed portion up to the position where it comes into contact with the upper surface of the housing 11, and then inserting the bolt into the holes 15 and 15.
It is fixed at 3.

As shown in FIG. 4, the bucket 3 is formed into a box-like shape having an open upper surface and a front surface by joining a bottom plate, two side plates and a back plate each made of metal (steel or the like). Has been done. At the tip of the bottom plate, two pipes 2 made of metal (steel etc.)
1, 21 are attached. In this case, pipe 2
The rotary shafts 13 of the base portion 2 are inserted into the reference numerals 1 and 21 so as to be rotatable with respect to the rotary shafts 13. Therefore, the bucket 3 is centered on the pipe 21 and the base 2
It is configured to be rotatable with respect to. Further, two hooks 22, 22, which connect one end of a wire rope 33 described later, are attached to the lower portion of the back plate, and an edge 24 projecting forward is joined to the front surface side of the bottom plate. .

As shown in FIG. 5, the drive mechanism 4 is provided with a support portion 31 corresponding to a columnar member in the present invention, and four pulleys 32, 32, ... Corresponding to a fulcrum in the present invention, and is shown in FIG. Metal wire rope 33,3
3 is provided. In this case, the support portion 31 is
It is made of metal (steel or the like) in a T-shape, and as shown in FIG. 2, it is erected at the center of the upper surface of the connecting pipe 12a that constitutes the base portion 2. As shown in FIG. 5, the pulleys 32, 32, ... Are rotatably attached to both ends of the short portion of the support portion 31 so that a wire rope 33 can be hung. Further, as shown in FIG.
A fall prevention mechanism for the wire rope 33 is attached.

As shown in FIG. 2, the wire rope 33 has one end attached to the above-mentioned hooks 22, 22 attached to the back plate (back side) of the bucket 3 at a position lower than the pulley 32 of the supporting portion 31. 7 is fixed, and as shown in FIG.
The hook 6 attached to a portion of the main body 62 of the main body 62 located below the pulley 32 (a predetermined portion of the present invention).
The other end is fixed to 4. In this case, the wire rope 33 is formed in a ring shape at its tip end so as to be easily fixed to the hook 64. Also, as shown in FIG.
The wire rope 33 is provided with an adjuster 41, which is formed so that its length can be adjusted, at an intermediate portion. Instead of the wire rope 33, a chain or a belt can be adopted.

Next, a method of mounting the attachment 1 on the forklift 61 will be described.

As shown in FIG. 7, first, with the attachment 1 placed on the ground, the width of the fork 63 of the forklift 61 is adjusted according to the width of the two cylindrical elongated casings 11 of the base portion 2. After the adjustment, the forklift 61 is advanced toward the opening of the tubular elongated housing 11 of the base portion 2 and the mounting portion of the fork 63 is inserted from the opening of the pipe 11. Then, the base end of the fork 63 is connected to the pipe 11.
The forward movement of the forklift 61 is stopped when the forklift 61 comes into contact with the upper surface of the cylinder, and in that state, the holes 15, 1
Insert bolt through 5. As a result, the attachment 1 is fixed to the fork 63. Then, the ends of the two wire ropes 33, 33 are fixed to the hooks 64, 64 of the main body 62 of the forklift 61, respectively. Finally, the length of the wire rope 33 is adjusted by the adjuster 41 so that the wire rope 33 is in a slightly loosened state. in this case,
When the slack is not provided, the bucket 3 immediately tilts when the fork 63 is raised in the usage state of the attachment 1 described later.

Next, a method of using the attachment 1 will be described.

For example, an example will be described in which soil on the ground is collected and moved to a predetermined place. First, as shown in FIG. 8, the forklift 61 is moved forward while rubbing the ground at the edge 24 of the bucket 3 of the attachment 1 to push the earth and sand into the bucket 3. Then, fork 63
Up until the wire rope 33 is no longer loose, and scoop up the earth and sand. Next, the forklift 61 is moved to a predetermined location while maintaining the state where the fork 63 is raised. When it reaches a certain place, the fork 63
To raise further. At this time, as shown in FIG. 9, as the fork 63 moves up, one end of the wire rope 33 on the side of the attachment 1 is pulled upward via the pulley 32 of the drive mechanism 4. In this case, the drive mechanism 4 rotates the tip end portion of the bucket 3 about the rotation shaft 13 of the base portion 2 and adjusts the relative displacement amount between the fork 63 and the position of the hook 64 on the main body 62 of the forklift 61. The back side of the bucket 3 is pulled up and tilted with a corresponding force. At this time, since the pulley 32 rotates together, the sliding resistance of the wire rope 33 is extremely small, so that the bucket 3 is smoothly inclined. As a result, as shown in the figure, when the bucket 3 is tilted, the sediment loaded on the bucket 3 slides down, and the sediment is moved to a predetermined location.

As described above, according to this attachment 1, it can be used in common with any forklift having a general shape and function regardless of the model and can be easily mounted. Further, according to this attachment 1, since the bucket 3 can be pulled up by the wire rope 33, the bucket 3 has a wide tiltable range and can be tilted at an arbitrary angle. Further, according to the attachment 1, since the earth and sand can be surely lowered from the bucket 3 only by raising the fork 63, the work efficiency can be sufficiently improved while the operation is extremely easy. Further, according to this attachment 1, since it is configured by a simple mechanism without providing a dedicated power source, it can be manufactured at low cost and durability can be improved. Moreover, the maximum inclination angle of the bucket 3 can be arbitrarily defined by appropriately adjusting the amount of slack of the wire rope 33 when the fork 63 is most lowered.

The present invention is not limited to the above-described embodiments of the invention. For example, instead of the drive mechanism 4 of the attachment 1, the drive mechanism 4A shown in FIG. 10 can be adopted. The drive mechanism 4A uses the principle of leverage, and as shown in the figure, is provided with a support portion (columnar member) 31A, wire ropes 33A and 33B, and an arm 34. In this case, the support portion 31
A is provided in place of the support portion 31 and is erected at the same position as the support portion 31. Further, the support portion 31A has a rounded upper end portion. The arm 34 is attached to the upper end portion of the support portion 31A such that both ends thereof can move up and down, and the central portion thereof is rotatable. Further, one end of the wire rope 33A is fixed to one end of the arm 34, and the other end thereof is fixed to a position below the rotation shaft 35 of the support portion 31A on the back side of the bucket 3 in the same manner as the wire rope 33. ing. Further, one end of the wire rope 33B is fixed to the other end of the arm 34, and the other end thereof is fixed to a portion of the main body 62 of the forklift 61 located below the rotating shaft 35 in the same manner as the wire rope 33. There is. In this drive mechanism 4A as well, similar to the drive mechanism 4, when the fork 63 of the forklift 61 moves upward, one end of the arm 34 has a support portion 31A.
The wire rope 33 </ b> A pulls up the bucket 3 by pivoting about the pivot shaft 35, and tilts the bucket 3. Therefore, the same effect as that of the drive mechanism 4 can be obtained.

Further, for example, by providing a pulley on the support portion 31 of the drive mechanism 4 via a spring or the like, the wire rope 33 can be mounted without slack. Further, in the attachment 1 described above, the bucket 3 is formed in a box shape with the upper surface and the front surface opened, but it may be formed in the box shape with only the upper surface opened.
It is possible to carry and carry out powdery materials and fluid materials. Further, the pulley 32 is not always necessary, and the groove portion is formed on the upper portion of the support portion 31 and the bottom portion of the groove portion (which constitutes the fulcrum in the present invention) is formed smoothly, so that the wire rope 33 and the like are smoothly formed. It can be slid. Further, by arranging a rod-shaped columnar body above the base portion 2 in parallel with the connecting pipe 12a and pushing up the wire rope 33 with this rod-shaped columnar body, the same function as the pulley 32 can be provided.

Further, in the embodiment of the present invention, the other end of the wire rope 33 (or 33B) is located below the pulley 32 (fulcrum in the present invention) or the rotating shaft 35 in the main body 62 of the forklift 61. However, the predetermined portion to which the other end of the wire rope 33 is fixed is not limited to that position, but is fixed to a position similar to or higher than the position of the pulley 32 or the rotating shaft 35. You can also do it. Also, the wire rope 33
The predetermined portion on the main body 62 side for fixing is not limited to one, but a plurality of fixing positions are defined in the vertical direction,
The other end of the wire rope 33 can be fixed to any of the fixing positions. With this configuration, the maximum tilt angle of the bucket 3 can be arbitrarily defined according to the fixed position. Further, regarding the shape and size of the support portions 31 and 31A, the number and attachment positions of the pulleys 32, the number and attachment positions of the wire ropes 33, and the shape and size of each portion such as the shape and size of the arm 34, The configurations are not limited to those shown in the embodiments of the present invention, and can be changed as appropriate.

[0026]

As described above, according to the attachment for a forklift according to the first aspect of the present invention, at least the upper surface of the bucket is formed into a box shape, and the bucket has a tip portion rotatably attached to the tip portion of the base portion. Since the drive mechanism is configured to include the attachment, the columnar member, and any one of the rope, the chain, and the belt, the bucket can be tilted at a wide range and can be tilted at any angle, and the fork is raised. Since the sand and the like can be surely removed from the bucket only by itself, the work efficiency can be sufficiently improved while the operation is extremely easy.
Further, according to this forklift attachment, since it can be configured by a simple mechanism without providing a dedicated power source, it can be manufactured at low cost and durability can be improved.

Further, according to the forklift attachment of the second aspect, since the fulcrum is constituted by the pulley rotatably attached to the columnar member, the sliding resistance of the rope or the like for connecting the forklift body and the attachment. Can be made smaller, so that the bucket can be tilted smoothly.

Further, according to the attachment for a forklift according to claim 3, a box-shaped bucket having at least its upper surface opened is attached to the tip of the base so that the tip of the bucket is rotatable. , Arm,
By configuring the drive mechanism with two sets of one of the rope, the chain and the belt, the tiltable range of the bucket is wide and the bucket can be tilted at any angle, and the fork is simply raised. Since the earth and sand can be surely lowered from the bucket, the work efficiency can be sufficiently improved while the operation is extremely easy. Furthermore, even this forklift attachment can be constructed at a low cost since it can be constructed with a simple mechanism without providing a dedicated power source, and the durability can be improved.

According to the forklift attachment of the fourth aspect, a pair of tubular elongated casings, which are spaced in parallel and into which the respective mounting portions of the pair of forks can be inserted, respectively, and a pair of tubular lengths. By configuring the base part with a connecting part that connects the length cases to each other, regardless of the model,
It can be commonly used for forklifts having a general shape and function, and can be easily mounted.

[Brief description of drawings]

FIG. 1 is a perspective view of an attachment 1 according to an embodiment of the present invention as seen obliquely from the front.

FIG. 2 is a perspective view of the attachment 1 according to the embodiment of the present invention as seen obliquely from the rear.

FIG. 3 is a perspective view of the base portion 2 according to the embodiment of the present invention.

FIG. 4 is a perspective view of the bucket 3 according to the embodiment of the present invention.

FIG. 5 is a perspective view of the drive mechanism 4 according to the embodiment of the present invention.

FIG. 6 is a wire rope 33 according to an embodiment of the present invention.
FIG.

FIG. 7 is a perspective view showing a state in which the attachment 1 according to the embodiment of the present invention is mounted on a forklift 61.

FIG. 8 is a side view showing a state in which the attachment 1 according to the embodiment of the present invention is mounted on the forklift 61.

FIG. 9 is a side view showing a state in which the attachment 1 according to the embodiment of the present invention is mounted on a forklift 61 and a fork 63 is raised.

FIG. 10 is a drive mechanism 4A according to another embodiment of the present invention.
FIG.

FIG. 11 is a perspective view of a conventional attachment 51.

FIG. 12 is a front view showing a state in which a conventional attachment 51 is mounted on a forklift 61.

[Explanation of symbols]

1 Forklift attachment 2 base 3 buckets 4,4A drive mechanism 11 Long tubular housing 12a, 12b Connection pipe 31, 31A support 32 pulley 33, 33A, 33B wire rope 34 Arm 35 rotation axis 61 forklift 63 forks

Claims (4)

[Claims] 1. A forklift truck comprising a base portion mountable on a fork of a forklift, a bucket mounted on an upper surface of the base portion, and a drive mechanism disposed on the base portion. An attachment for a forklift, wherein the bucket is formed in a box shape with at least an upper surface thereof open, and a tip end portion of the bottom portion of the bucket located on the tip end side of the fork is rotatably attached to the tip end portion of the base portion. The driving mechanism includes a columnar member that is erected on the rear end side of the base portion and has a fulcrum at its upper end, and one end of the drive mechanism at a position below the fulcrum of the columnar member on the back side of the bucket. , A chain and a belt whose other end is fixed to a predetermined portion of the main body of the forklift truck via the fulcrum. Any one forklift attachment that is configured with a. 2. The attachment for a forklift according to claim 1, wherein the fulcrum is a pulley that is rotatably attached to the columnar member. 3. A forklift truck comprising a base portion that can be mounted on a fork of a forklift, a bucket placed on the upper surface of the base portion, and a drive mechanism arranged on the base portion. An attachment for a forklift, wherein the bucket is formed in a box shape with at least an upper surface thereof open, and a tip end portion of the bottom portion of the bucket located on the tip end side of the fork is rotatably attached to the tip end portion of the base portion. The drive mechanism includes a columnar member erected on a rear end side of the base portion, an arm having a center portion rotatably attached to an upper end portion of the columnar member, and the back side of the bucket. A rope, a chain of which one end is fixed to a position below the rotation axis of the arm of the columnar member and the other end is fixed to one end of the arm. And a belt, and one of a rope, a chain and a belt, one end of which is fixed to a predetermined portion of the main body of the forklift and the other end of which is fixed to the other end of the arm. Forklift attachments that are used. 4. The pair of tubular elongated casings, wherein the base portion is formed in parallel with each other so that the respective mounting portions of the pair of forks can be inserted therein. A connecting part for connecting the bodies to each other is provided.
The attachment for a forklift according to any one of 1 to 3.