JP6984966B2 - Cargo handling equipment - Google Patents

Description

The present invention relates to a cargo handling device.

Conventionally, a forklift hydraulic piping device in which various hydraulic hoses are fixed to an intermediate tie beam provided behind the center cylinder for a forklift and a guide plate provided so as to extend upward from the intermediate tie beam. Is known (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2000-38297

However, since the intermediate tie beam is provided on the upper part of the center cylinder, there is a problem that the front view of the forklift is narrowed.

According to the first aspect, the cargo handling device is attached to a cylinder that is arranged between the left and right masts and moves up and down along the left and right masts, and has a first mounting member that fastens the end of the chain and moves up and down along the left and right masts. The attachment is provided with a pipe for supplying and discharging pressure oil as hydraulic oil, and a second mounting member for fixing the first hose hanging from the upper part of the cylinder among the pipes together with the first mounting member. .. Further, the cargo handling device includes a first guide member that guides a second hose routed from each of the left and right masts of the pipe in the vicinity of the cylinder, the first mounting member, and the first guide member. It is further provided with a third mounting member for connecting the above.

According to the present invention, the hose is attached to the cylinder between the left and right masts to improve the forward visibility of the forklift.

It is a side view which shows an example of the forklift by one Embodiment of this invention. 2 (a) is a front view of the cargo handling device, FIG. 2 (b) is a rear view of the cargo handling device, and FIG. 2 (c) is an upper plan view of the cargo handling device. It is a perspective view which shows a part of a cargo handling apparatus enlarged.

Hereinafter, the forklift according to the embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view of a forklift according to an embodiment of the present invention. The forklift 1 includes a vehicle body 4 provided with traveling wheels 2 and a driver's seat 3, and a cargo handling device 5 provided at the front portion of the vehicle body 4. The cargo handling device 5 is arranged on the pair of left and right outer masts 6 fixed to the front part of the vehicle body 4, the pair of left and right inner masts 7 supported and guided by the outer mast 6, and the inner mast 7 so as to be able to move up and down. It is provided with a carriage 8 which is an elevating body. The carriage 8 is provided with various attachments 9 (for example, side shifts, fork shifts, side clamps, stabilizers, etc.) equipped with actuators. The details of the cargo handling device 5 will be described later. Further, a tilt cylinder 13 for tilting the outer mast 6 in the front-rear direction is provided between the outer mast 6 and the vehicle body 4.

In the present embodiment, a two-stage full free mast will be described as an example of the cargo handling device 5. The cargo handling device 5 is not limited to the two-stage full free mast, and may be a multi-stage full free mast having three or more stages. The cargo handling device 5 includes a pair of outer masts 6, a pair of inner masts 7, a pair of lift cylinders 10 for raising and lowering the inner mast 7 guided by the outer mast 6, and a center cylinder 11 for raising and lowering the carriage 8. , Equipped with.

The cargo handling device 5 of the present embodiment will be described with reference to FIG. 2A is a front view of the cargo handling device 5, FIG. 2B is a rear view of the cargo handling device 5, and FIG. 2C is an upper plan view of the cargo handling device 5. The outer mast 6 functions as a guide rail for the inner mast 7. The outer mast 6 is composed of a right outer mast 6R and a left outer mast 6L. The upper ends of the pair of outer masts 6, that is, the upper ends of the right outer mast 6R and the upper ends of the left outer mast 6L are connected by the outer mast connecting portion 61. The lower ends of the pair of outer masts 6 are connected to each other by a cylinder support 62. The pair of lift cylinders 10 are supported by the cylinder support 62. Further, the pair of outer masts 6 are connected by the tilt beam 63 between the outer mast connecting portion 61 and the cylinder support 62.

The lift cylinder 10 is a ram or piston type hydraulic cylinder and is supported by a cylinder support 62 as described above. The pair of lift cylinders 10 is composed of a left lift cylinder 10L and a right lift cylinder 10R. The tip of the lift cylinder 10, that is, the tip of the piston rod 101 provided at the upper end of the lift cylinder 10 is connected to the upper end of the inner mast 7.

The inner mast 7 is provided inside the outer mast 6 (inside the forklift 1 in the left-right direction) and functions as a guide rail for the carriage 8. The inner mast 7 is composed of a right inner mast 7R and a left inner mast 7L. The upper ends of the pair of inner masts 7, that is, the upper ends of the right inner mast 7R and the upper ends of the left inner mast 7L are connected by the inner mast connecting portion 71. The tip of the piston rod 101 of the lift cylinder 10 described above is connected to the inner mast connecting portion 71. The lower part of the pair of inner masts 7 is connected by the inner mast intermediate beam 72 that connects the right inner mast 7R and the left inner mast 7L. The inner mast 7 moves up and down along the outer mast 6 in accordance with the expansion and contraction operation of the piston rod 101 of the lift cylinder 10.

The center cylinder 11 is a ram type or piston type hydraulic cylinder, and is attached from the front side of the forklift 1 at substantially the center of the inner mast intermediate beam 72 in the left-right direction of the inner mast 7. A chain wheel portion (not shown) is provided at the tip of the piston rod 111 of the center cylinder 11. A chain having one end fixed to the carriage 8 and the other end fixed to the rear of the center cylinder 11 (driver's seat 3 side) is wound around the chain wheel portion. The carriage 8 moves up and down along the inner mast 7 in accordance with the expansion and contraction operation of the piston rod 111 of the center cylinder 11. A guide portion for guiding a plurality of hoses is attached to the center cylinder 11. Details of the plurality of hoses and the guide unit will be described later.

The cargo handling device 5, which is a two-stage full free mast, is configured as described above. First, the piston rod 111 of the center cylinder 11 is extended to raise the carriage 8 and the attachment 9. Then, when the piston rod 111 of the center cylinder 11 extends to the maximum length, the piston rod 101 of the lift cylinder 10 expands and the inner mast 7 rises, whereby the carriage 8 and the attachment 9 further rise. The cargo handling device 5 lifts the hydraulic oil from the control valve (not shown) provided on the vehicle body 4 so that the center cylinder 11 is operated in advance as described above and the lift cylinder 10 is subsequently operated. A pipe 40 for supplying to the cylinder 10 and the center cylinder 11 is provided.

The cargo handling device 5 connects a control valve (not shown) provided on the vehicle body 4 and an actuator (not shown) provided in the attachment 9, and has a pipe 50 for supplying / discharging hydraulic oil for operating the actuator. The pipe 50 includes a right pipe 51 connected to the attachment 9 across the outer circumference of the right lift cylinder 10R and a left pipe 52 connected to the attachment 9 across the outer circumference of the left lift cylinder 10L. The right pipe 51 includes a pair of first right pipelines (pipes) 511, a pair of first right hoses 512, a pair of second right pipelines (pipes) 513, and a pair of second right hoses 514. .. The left pipe 52 includes a pair of first left pipes 521, a pair of first left hoses 522, a pair of second left pipes 523, and a pair of second left hoses 524. ..

The first right pipeline 511 is connected to the hose on the vehicle body 4 side via the right joint 510R, and is routed across the right lift cylinder 10R to the outer mast connecting portion 61. The pair of first right hoses 512 are connected to the first right pipeline 511 via the right joint 515R attached to the lower surface of the outer mast connecting portion 61. The first right hose 512 has a first right guide member 81R extending in the vertical direction along the right lift cylinder 10R inside the right lift cylinder 10R, and a vertical direction along the center cylinder 11 on the right side of the center cylinder 11. Guided by the second right guide member 82R extending to the center cylinder 11, the center cylinder 11 is routed to the vicinity of the upper right side. Since the second right guide member 82R is mounted at a position separated from the center cylinder 11 by a predetermined distance in the horizontal direction perpendicular to the vertical direction by the guide mounting member 90 described later, the second right guide member 82R is the center cylinder 11. The first right hose 512 is guided in the vertical direction at a position at a predetermined distance from. The predetermined distance can be arbitrarily set in consideration of the relationship with the arrangement position and the like of other configurations of the cargo handling device 5.

The pair of second right pipelines 513 is connected to the first right hose 512 via the right joint 516R and is routed to the lower part of the center cylinder 11. The pair of second right hoses 514 are hooked on a hose pulley 83 provided on the upper part of the center cylinder 11. The second right hose 514 hanging from the hose pulley 83 to the driver's seat 3 side of the forklift 1 is connected to the second right pipeline 513 via the right joint 517R, and is hung from the hose pulley 83 to the front side of the forklift 1. The right hose 514 is connected to the actuator. The second right hose 514 is attached to the inner mast intermediate beam 72 by, for example, a beam mounting member 84 which is a convex bending bracket screwed to the inner mast intermediate beam 72 from the driver's seat 3 side.

The left pipe 52 is connected to the attachment 9 across the outer circumference of the left lift cylinder 10L by using a configuration symmetrical to that of the right pipe 51 described above. The first left pipeline 521 is connected to the hose on the vehicle body 4 side via the left joint 510L, and is routed across the left lift cylinder 10L to the outer mast connecting portion 61. The pair of first left hoses 522 are connected to the first left pipeline 521 via a left joint 515L attached to the lower surface of the outer mast connecting portion 61. The first left hose 522 has a first left guide member 81L extending in the vertical direction along the left lift cylinder 10L inside the left lift cylinder 10L, and a vertical direction along the center cylinder 11 on the left side of the center cylinder 11. Guided by the second left guide member 82L extending to the center cylinder 11, the center cylinder 11 is routed to the vicinity of the upper left side. Since the second left guide member 82L is mounted at a position separated from the center cylinder 11 by a predetermined distance in the horizontal direction perpendicular to the vertical direction by the guide mounting member 90 described later, the second left guide member 82L is the center cylinder 11. The first left hose 522 is guided in the vertical direction at a position at a predetermined distance from. The predetermined distance can be arbitrarily set in consideration of the relationship with the arrangement position and the like of other configurations of the cargo handling device 5.

The pair of second left pipelines 523 are connected to the first left hose 522 via the left joint 516L and are routed to the lower part of the center cylinder 11. The pair of second left hoses 524 are mounted on hose pulleys 83 provided on the upper part of the center cylinder 11. The second left hose 524 suspended from the hose pulley 83 to the driver's seat 3 side of the forklift 1 is connected to the second left pipeline 523 via the left joint 517L, and is hung from the hose pulley 83 to the front side of the forklift 1. The left hose 524 connects to the actuator. The second left hose 524 is attached to the inner mast intermediate beam 72 by the beam attachment member 84 in the same manner as the second right hose 514.

In the following description, the right joint 510R and the left joint 510L are collectively referred to as a joint 510, the right joint 515R and the left joint 515L are collectively referred to as a joint 515, and the right joint 516R and the left joint 516L are referred to. When collectively referred to, it is referred to as a joint 516, and when the right joint 517R and the left joint 517L are collectively referred to, it is referred to as a joint 517. Further, the first right guide member 81R and the first left guide member 81L are collectively referred to as the first guide member 81, and the second right guide member 82R and the second left guide member 82L are collectively referred to as the second guide member 82. Call.
In the following description, since the right pipe 51 and the left pipe 52 have a symmetrical configuration, the contents common to the left and right configurations will be described on behalf of the right configuration.

With reference to FIG. 3, the guide portion 80 for guiding the first and second right hoses 512 and 514 of the pipe 50, the first and second left hoses 522, 524, and the guide portion 80 are center cylinders 11. The guide mounting member 90 for mounting on the hose will be described. FIG. 3 is an external perspective view showing a case where the vicinity of the upper portion of the center cylinder 11 is viewed from the rear (driver's seat 3 side). That is, in FIG. 3, the left back of the paper is the front of the forklift 1, the right front of the paper is the back of the forklift 1, the right back of the paper is the right with respect to the front of the forklift 1, and the left front of the paper is the left with respect to the front of the forklift 1. Is. The cargo handling device 5 has a symmetrical configuration with an axle C extending in the front-rear direction of the forklift 1 as a central axis.

The guide portion 80 includes the above-mentioned first guide member 81, a second guide member 82, and a hose pulley 83. The guide mounting member 90 includes a chain mounting member 91 wound around the upper outer periphery of the center cylinder 11 and a connecting member 92 connecting the chain mounting member 91 and the above-mentioned second guide member 82.
The first guide member 81 is attached to each of the pair of lift cylinders 10, and the second guide member 82 is attached to the left and right sides of the center cylinder 11.

The first guide member 81 extends in the vertical direction along the lift cylinder 10 as described above. The first guide member 81 has, for example, a U-shaped cross section on a surface intersecting the extending direction (vertical direction), and the opening 813 of the U-shaped cross section is inside the cargo handling device 5, that is, on the center cylinder 11 side. It is attached to the outer mast 6 by the mast attachment member 812 so as to face. The second guide member 82 extends in the vertical direction along the center cylinder 11 as described above. The second guide member 82 has, for example, a U-shaped cross section on a surface intersecting the extending direction (vertical direction), and the opening portion 823 of the U-shaped cross section is outside the cargo handling device 5, that is, on the lift cylinder 10 side. It is attached to the center cylinder 11 by the guide attachment member 90 so as to face. The first guide member 81 and the second guide so that the opening 813 of the U-shaped cross section of the first guide member 81 and the opening 823 of the U-shaped cross section of the second guide member 82 face each other. The member 82 is attached. That is, the first right guide member 81R and the second right guide member 82R face each other, and the first left guide member 81L and the second left guide member 82L face each other. The hose pulley 83 is rotatably attached to a hose pulley bracket (not shown) attached to the upper end of the center cylinder 11 so as to be rotatable about a shaft (not shown) extending in a direction orthogonal to the front-rear direction of the forklift 1. ..

The chain mounting member 91 of the guide mounting member 90 is a member (for example, an O-shaped metal fitting) for fastening the chain (not shown) of the center cylinder 11, and is wound along the outer circumference of the center cylinder 11. A pair of fastening portions extending toward the driver's seat 3 along the axle C are formed at the pair of ends of the chain mounting member 91 on the driver's seat 3 side, and the chain mounting member 91 is centered at this mounting portion by bolt tightening. It is attached to the cylinder 11. Further, a connecting member 92 is attached to each of the pair of fastening portions by bolting or the like.

The connecting member 92 in the present embodiment is composed of a vertically extending portion 921 extending in the vertical direction, a horizontally extending portion 922 extending in the left-right direction, and a guide connecting portion 923. The vertically stretched portion 921 is provided with a mounting hole at the lower end portion for mounting on the mounting portion of the chain mounting member 91, and has a flat surface along the front-rear direction of the forklift 1. A pair of second right hoses 514 and a second left hose hang down from the hose pulley 83 described above, and pass through a space created between the vertically extended portions 921 of the pair of connecting members 92 provided on the left and right sides of the center cylinder 11.

The horizontally stretched portion 922 is formed at the upper end portion of the vertically stretched portion 921, and stretches from the center cylinder 11 toward the second guide member 82. The guide connecting portion 923 is formed at the upper end of the horizontally stretched portion 922 near the end on the lift cylinder 10 side. The guide connecting portion 923 is formed as a surface that intersects the vertical direction and extends toward the driver's seat 3 side of the forklift 1. The end portion 923A of the guide connecting portion 923 on the lift cylinder 10 side is attached to the upper end portion of the second guide member 82. In the present embodiment, the end portion 923A of the guide connecting portion 923 is formed so as to form a shape forming a predetermined angle with respect to the axle C. Therefore, in the second guide member 82 attached to the guide connecting portion 923, the open portion 823 of the U-shaped cross section forms a predetermined angle with respect to the axle C. In the present embodiment, as described above, the opening portion 813 of the U-shaped cross section of the first guide member 81 and the opening portion 823 of the U-shaped cross section of the second guide member 82 face each other so as to face each other. The case where a predetermined angle is determined is shown as an example.

The horizontal extension portion 922 is provided with mounting holes, and the horizontal extension portion 922 of the pair of connecting members 92 provided on the left and right sides of the center cylinder 11 is a hose that is, for example, a convex bending bracket from the driver's seat 3 side. Engaged by the mounting member 85. As a result, the pair of second right hoses 514 and the pair of second left hoses 524 that hang down the space between the pair of vertically extending portions 921 are suppressed from moving in the direction along the axle C, so that they can be separated. Is suppressed.
The shape of the connecting member 92 described above is an example and is not limited to the above shape, and the second guide member 82 is attached according to the shape of the second guide member 82 in the vicinity of the center cylinder 11. Any shape can be adopted to be possible.

In the cargo handling device 5, first, the piston rod 111 of the center cylinder 11 is extended to raise the carriage 8 and the attachment 9. At this time, the hose pulley 83 also rises as the piston rod 111 extends. The second right hose 514 and the second left hose 524 hanging in front of the center cylinder 11 are sent to the rear of the center cylinder 11 (driver's seat 3 side) by raising the carriage 8 and raising and rotating the hose pulley 83. Will be.

When the piston rod 111 of the center cylinder 11 is extended to the maximum length, the piston rod 101 of the lift cylinder 10 is extended and the inner mast 7 is raised, whereby the carriage 8 and the attachment 9 are further raised. The first right hose 512 and the first left hose 522 rise together with the inner mast 7 until the piston rod 101 of the lift cylinder 10 extends to the maximum length. The first right hose 512 and the first left hose 522 are towed upward from the joint 516 side by the rising center cylinder 11. Therefore, the first right hose 512 and the first left hose 522 pass from the side of the first guide member 81 attached to the outer mast 6 to the side of the second guide member 82 that rises together with the center cylinder 11, and the second guide. It rises while being guided by the member 82. When the cylinder rod 101 of the lift cylinder 10 is extended to the maximum, the first right hose 512 and the first left hose 522 are routed from above the first guide member 81 to below the second guide member 82. As a result, since there is no configuration that obstructs the space between the pair of outer masts 6L and 6R, a wide field of view can be secured from the driver's seat 3.

According to the above-described embodiment, the following effects can be obtained.
(1) The cargo handling device 5 is arranged between the left and right outer masts 6, is attached to a center cylinder 11 that moves up and down along the outer mast 6, and has a chain mounting member 91 of a guide mounting member 90 that fastens the end of the chain. A pipe 50 for supplying and discharging pressure oil as hydraulic oil to an attachment 9 that moves up and down along the left and right outer masts 6, and a second right hose 514 and a second right hose hanging from the upper part of the center cylinder 11 of the pipe 50. 2 A hose mounting member 85 for fixing the left hose 524 together with the chain mounting member 91 is provided. As a result, the second right hose 514 and the second left hose 524 hanging from the center cylinder 11 can be fastened to the center cylinder 11 without arranging the inner mast intermediate beam 72 in the vicinity above the center cylinder 11. Therefore, unlike the conventional technique in which the inner mast beam is attached near the upper side of the center cylinder, a wide field of view near the upper side of the center cylinder 11 can be secured.

(2) The cargo handling device 5 includes a second guide member 82 that guides the first right hose 512 and the first left hose 522 routed from each of the left and right outer masts 6 of the pipe 50 in the vicinity of the center cylinder 11. , A connecting member 92 of a guide mounting member 90 that connects the chain mounting member 91 and the second guide member 82 is provided. As a result, the second guide member 82 can be attached to the chain attachment member 91 for fastening the chain of the center cylinder 11, so that a new configuration for attaching the second guide member 82 to the center cylinder 11 is required. There is no. Therefore, it is possible to prevent the field of view from the driver's seat 3 from being narrowed by adding a new configuration.

(3) The second guide member 82 extends along the direction in which the center cylinder 11 moves up and down. As a result, the first right hose 512 and the first left hose 522, which move up and down as the center cylinder 11 moves up and down, can be reliably guided without shaking in the front-rear direction and the left-right direction of the forklift 1.

(4) The cargo handling device 5 is attached to each of the left and right outer masts 6, and the first guide member 81 guides the first right hose 512 and the first left hose 522 along the direction in which the left and right outer masts 6 extend. The connecting member 92 of the guide mounting member 90 connects the chain mounting member 91 and the second guide member 82 so that the first guide member 81 and the second guide member 82 face each other. As a result, the first right hose 512 and the first left hose 522 can be raised and lowered without causing twisting or the like in the first right hose 512 and the first left hose 522 while the center cylinder 11 is being raised and lowered.

The following modifications are also within the scope of the present invention, and one or more of the modifications can be combined with the above-described embodiment.
Instead of the pair of second guide members 82, one second guide member 82 may be provided. For example, the second guide member 82 can be attached so as to guide the first right hose 512 and the first left hose 522 behind the center cylinder 11 (driver's seat 3 side). In this case, the second guide member 82 can be attached to the rear side (driver's seat 3 side) of the hose attachment member 85 with bolts or the like.
The second guide member 82 is not limited to that formed by a member having a U-shaped cross section extending in the vertical direction. An eyebolt having an opening through which the first right hose 512 and the first left hose 522 can pass, for example, an O-shaped opening may be attached to the attachment portion of the chain attachment member 91.
Further, the cargo handling device 5 is not too long in length of the first right hose 512 and the first left hose 522, and when the center cylinder 11 and the lift cylinder 10 are raised and lowered, the cargo handling device 5 is entangled with other configurations provided in the cargo handling device 5 and vibrates. The second guide member 82 may not be provided if there is no risk of the other configuration being damaged due to a large swing in the front-back and left-right directions. In this case, the connecting member 92 that connects the second guide member 82 and the chain mounting member 91 may have a shape in which the guide connecting portion 923 is not formed. Alternatively, the cargo handling device 5 may directly attach the hose attachment member 85 to the chain attachment member 91 with a bolt or the like without providing the connecting member 92. In this case, for example, a mounting hole is formed on a surface of the hose mounting member 85 parallel to the axle C, and the mounting hole and the fastening portion extending along the axle C at the end of the chain mounting member 91 on the driver's seat 3 side are formed. The hose mounting member 85 and the chain mounting member 91 are mounted by tightening bolts or the like.

The present invention is not limited to the above-described embodiment as long as the features of the present invention are not impaired, and other embodiments considered within the scope of the technical idea of the present invention are also included within the scope of the present invention. ..

1 ... Fork lift 5 ... Cargo handling device 6 ... Outer mast 6R ... Right outer mast 6L ... Left outer mast 7 ... Inner mast 7R ... Right inner mast 7L ... Left inner mast 8 ... Carriage 10 ... Lift cylinder 10R ... Right lift cylinder 10L ... Left Lift cylinder 11 ... Center cylinder 50 ... Piping 51 ... Right piping 52 ... Left piping 80 ... Guide section 81 ... First guide member 82 ... Second guide member 83 ... Hose pulley 85 ... Hose mounting member 90 ... Guide mounting section 91 ... Chain mounting Member 92 ... Connecting member 101 ... Piston rod 111 ... Piston rod 511 ... First right pipe line 512 ... First right hose 513 ... Second right pipe line 514 ... Second right hose 521 ... First left pipe line 522 ... First Left hose 523 ... 2nd left pipeline 524 ... 2nd left hose 921 ... Vertical extension portion 922 ... Horizontal extension portion 923 ... Guide connection portion

Claims (3)

A first mounting member that is placed between the left and right masts and is attached to a cylinder that moves up and down along the left and right masts and fastens the end of the chain.
Piping for supplying and discharging pressure oil as hydraulic oil to the attachment that moves up and down along the left and right masts,
A second mounting member for fixing the first hose hanging from the upper part of the cylinder in the pipe together with the first mounting member ,
A first guide member that guides a second hose routed from each of the left and right masts of the pipe in the vicinity of the cylinder, and
A cargo handling device including a third mounting member that connects the first mounting member and the first guide member. In the cargo handling device according to claim 1,
The first guide member is a cargo handling device that extends along the direction in which the cylinder moves up and down. In the cargo handling device according to claim 2,
Further provided with a second guide member attached to each of the left and right masts and guiding the second hose along the direction in which the left and right masts extend.
The third mounting member is a cargo handling device that connects the first mounting member and the first guide member so that the first guide member and the second guide member face each other.

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