JP2019011186A - Pipe mounting member of forklift - Google Patents

Abstract

To improve the degree of freedom in piping for a hydraulic hose.SOLUTION: A pipe mounting member of a forklift for mounting a hydraulic pipe, which supplies/discharges hydraulic oil, on a mast structure includes a first clamp member mounted with the hydraulic pipe and a second clamp member holding the hydraulic pipe together with the first clamp member. The first clamp member has a notch part on one end part of a rear surface of a surface where the hydraulic pipe is held and is mounted on the mast structure by the notch part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pipe mounting member for a forklift.

  2. Description of the Related Art Conventionally, a hydraulic hose connected to a hydraulic cylinder that drives an attachment is fixed to the outer mast of a forklift mast structure by a clamp in a state in which the outer mast is pulled up and down (for example, patents) Reference 1).

JP 2007-331885 A

  However, there is a problem that the degree of freedom of piping is low and workability is low because it has a dual-support structure that uses two bolts to attach the clamp to the outer mast and fix the hydraulic hose.

  According to the first aspect, a forklift pipe mounting member for mounting hydraulic piping for supplying and discharging hydraulic oil to a mast structure, the first clamping member to which the hydraulic piping is mounted, and the first clamping member And a second clamp member for sandwiching the hydraulic piping, and the first clamp member has a notch portion at one end of the back surface of the surface on which the hydraulic piping is sandwiched, and the notch portion. And attached to the mast structure.

  According to the present invention, since the first clamp member is attached to the mast structure at the notch portion at one end, the degree of freedom of piping can be increased and workability can be improved.

It is a side view showing an example of a forklift according to an embodiment of the present invention. It is the perspective view which expanded a part of cargo handling apparatus of one embodiment. It is a top view explaining an attachment member. It is a top view explaining an example of the attachment member in a modification.

Hereinafter, a forklift according to an 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 of the vehicle body 4. The cargo handling device 5 is supported and guided by a pair of left and right outer masts 6 fixed to the front portion of the vehicle body 4, a pair of left and right intermediate masts 12 supported and guided by the outer mast 6 and freely movable up and down. A pair of left and right inner masts 7 that can be moved up and down, and a carriage 8 that is a lifting body disposed on the inner mast 7 so as to be movable up and down are provided. The carriage 8 is provided with various attachments 9 (for example, a side shift, a fork shift, a side clamp, a stabilizer, etc.) provided with an actuator. Details of the cargo handling device 5 will be described later. Further, a tilt cylinder 13 is provided between the outer mast 6 and the vehicle body 4 to tilt the outer mast 6 in the front-rear direction.

  In the present embodiment, a three-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 a three-stage full free mast, and may be a two-stage full free mast or a multi-stage full free mast exceeding three stages. The cargo handling device 5 includes a pair of outer masts 6, a pair of inner masts 7, a pair of intermediate masts 12, a pair of lift cylinders 10 that lift and lower the inner mast 7 guided by the outer mast 6, and a carriage 8. And a center cylinder 11 for the purpose.

  With reference also to FIG. 2, the cargo handling apparatus 5 of this Embodiment is demonstrated. FIG. 2 is an external perspective view showing a case where a part of the upper part of the cargo handling device 5 is viewed from the rear (driver's seat 3 side). That is, in FIG. 2, the left rear side of the page is the front of the forklift 1, the right front side of the page is the rear side of the forklift 1, the right back side of the page is the right side of the front of the forklift 1, It is. The cargo handling device 5 has a left-right symmetric configuration with an axle C extending in the front-rear direction of the forklift 1 as a central axis. The outer mast 6 functions as a guide rail for a pair of intermediate masts 12 positioned inside the pair of outer masts 6 (in the left-right direction of the forklift 1). FIG. 2 shows the left outer mast 6L on the left side of the pair of outer masts 6 and the surrounding structure. The upper ends of the pair of outer masts 6 are connected by an outer mast connecting portion 61. The lower ends of the pair of outer masts 6 are connected by a lower tie beam (not shown). In the left outer mast 6L, one end of a chain 19 for raising and lowering an inner mast 7 described later is connected to a connecting member 20 that is a chain anchor.

  The pair of lift cylinders 10 are ram type or piston type hydraulic cylinders and are supported by the lower tie beam at the lower end of the outer mast 6 as described above. In FIG. 2, the left lift cylinder 10 </ b> L of the pair of lift cylinders 10 is shown. The distal ends of the pair of lift cylinders 10, that is, the distal ends of the piston rods 101 provided at the upper end portion of the lift cylinder 10 are connected to the upper end of the intermediate mast 12.

  The intermediate mast 12 functions as a guide rail for the pair of inner masts 7 positioned on the inner side of the pair of intermediate masts 12 (the inner side in the left-right direction of the forklift 1). The upper ends of the pair of intermediate masts 12 are connected by an intermediate mast connecting portion (not shown). The tip of the piston rod 101 of the lift cylinder 10 described above is connected to the intermediate mast coupling portion.

  A chain pulley (not shown) on which a chain is hung and a hose pulley 15 on which a pipe which is a hydraulic hose described later is hung are attached to an upper portion of the intermediate mast 12 (for example, an intermediate mast connecting portion). . The chain pulley and the hose pulley 15 are attached so that their axes are parallel to the longitudinal direction of the vehicle, that is, to the axle C. One end of the chain 19 hung on the chain pulley is connected to the connecting member 20 of the outer mast 6 described above, and the other end is connected to the lower part of the inner mast 7. With the above configuration, the intermediate mast 12 moves up and down along the outer mast 6 and the inner mast 7 moves up and down along the intermediate mast 12 via the chain 19 in accordance with the expansion and contraction of the piston rod 101 of the lift cylinder 10. To do.

  The upper ends of the pair of inner masts 7 are connected by an inner mast connecting portion (not shown). A center cylinder 11, which is a ram type or piston type hydraulic cylinder, is erected in the vicinity of the lower central portion of the pair of inner masts 7. A chain wheel portion (not shown) is provided at the tip of the center cylinder 11. A chain (not shown) having one end fixed to the carriage 8 and the other end fixed to the rear (the driver's seat 3 side) of the center cylinder 11 is wound around the chain wheel portion. As a result, the carriage 8 moves up and down along the inner mast 7 in accordance with the expansion and contraction of the piston rod (not shown) of the center cylinder 11.

  The cargo handling device 5 includes piping for supplying and discharging hydraulic oil for raising and lowering the lift cylinder 10, raising and lowering the center cylinder 11, and operating an actuator included in the attachment 9. In the present embodiment, the pipe is suspended from the hose pulley 15, one end is connected to the actuator on the front side of the forklift 1, and the other end is routed outside the left outer mast 6 </ b> L. A pair of hydraulic hoses 621 connected to the pipe on the vehicle body 4 side is provided at the bottom. Note that the hydraulic hose 621 is not limited to a pair of examples, and may be one or three or more.

  The hydraulic hose 621 suspended from the hose pulley 15 and routed along the outer mast 6 is attached to the left outer mast 6L by the attachment member 710. Hereinafter, the mounting member 710 will be described in detail.

  FIG. 3 is an enlarged plan view showing a state where the mounting member 710 is disassembled. The attachment member 710 includes a first clamp member 711, a second clamp member 712, and an attachment bolt 713. The first clamp member 711 and the second clamp member 712 are rectangular parallelepiped blocks. Mounting grooves for fitting and holding a hydraulic hose 621 routed along the axial direction of the outer mast 6 on the mutually opposing surfaces 711a and 712a of the first clamp member 711 and the second clamp member 712 711b and 712b are formed. The mounting grooves 711b and 712b are formed along the direction in which the hydraulic hose 621 is routed, that is, along the axial direction (vertical direction) of the outer mast 6. In the present embodiment, since the mounting member 710 holds the pair of hydraulic hoses 621, two mounting grooves 711 b are formed in the first clamp member 711, and two mounting grooves 712 b are formed in the second clamp member 712. Is formed.

  Through holes 714 and 715 for inserting the mounting bolts 713 are formed in the vicinity of both ends in the front-rear direction of the first clamp member 711 and the second clamp member 712. Of the through holes 714 of the first clamp member 711, taps are formed in the through holes 714 a on the rear side (driver's seat 3 side). The 1st clamp member 711 is attached to the connection member 20 with which the end of the chain 19 is connected by the surface 711c of the back side of the surface 711a. The connecting member 20 has a through hole 716 in which a tap centered on the axis AX2 is formed at a position coaxial with the axis AX1 of the through holes 714b and 715b of the first clamp member 711 and the second clamp member 712. .

  With the hydraulic hose 621 fitted in the mounting grooves 711b and 712b formed in the first clamp member 711 and the second clamp member 712, the first clamp member 711 and the second clamp member 712 are inserted into the through holes 714a and 715a. Fastened with the inserted mounting bolt 713a. As a result, the hydraulic hose 621 is sandwiched between the first clamp member 711 and the second clamp member 712.

  The mounting bolt 713b inserted through the through hole 714b of the first clamp member 711 and the through hole 715b of the second clamp member 712 is inserted through the through hole 716 formed in the connecting member 20 in contact with the first clamp member 711. It is concluded. Thereby, the attachment member 710 is attached to the connection member 20 provided in the left outer mast 6L.

  On the surface 711c of the first clamp member 711, a first portion 720 and a second portion 721 having different sizes in the thickness direction, that is, in the left-right direction when attached to the forklift 1, are formed. In the present embodiment, the first portion 720 is a portion where the through hole 714b is formed, and the second portion 721 is a portion where the through hole 714a is formed.

  The 1st clamp member 711 is comprised from the 1st part 720 and the 2nd part 721 by notching a part of surface 711c among rectangular parallelepiped blocks. The surface 711c is divided by the boundary surface 722 into a surface 720a corresponding to the first portion 720 and a surface 721a corresponding to the second portion 721. That is, the boundary surface 722 is a surface that intersects the surface 720 a of the first portion 720 and the surface 721 a of the second portion 721 of the surface 711 c of the first clamp member 711. As a result, the thickness of the first portion 720 in the left-right direction is smaller than the thickness of the second portion 721 in the left-right direction. That is, the distance between the surface 711a and the surface 720a in the first portion 720 is smaller than the distance between the surface 711a and the surface 721a of the second portion 721 where the mounting groove 711b is not formed. Therefore, the surface 711c has a step-like cross section. 3 shows an example in which the attachment groove 711b is formed in the second portion 721. However, the attachment groove 711b may be formed in the first portion 720, or in the first portion 720 and the second portion 721. It may be formed.

The shape corresponding to the connecting member 20 is cut out from the surface 711c so that the surface 720a of the first portion 720 of the first clamp member 711 is attached in contact with the left surface 20a of the connecting member 20, thereby the first portion. 720 is formed. Therefore, at least the length from the axis AX1 to the boundary surface 722 of the through hole 714b of the first clamp member 711 is larger than the length from the axis AX2 to the surface 20b of the through hole 716 of the connecting member 20. When the attachment member 710 is attached to the connection member 20, at least a part of the connection member 20 is formed by cutting out the surface 711c of the first clamp member 711, and a first portion formed of a surface 720a and a boundary surface 722. The first clamp member 711 and the connecting member 20 are engaged with each other. When the first clamp member 711 and the connecting member 20 of the mounting member 710 are engaged as described above, a force in the direction in which the hydraulic hose 621 is drawn, that is, a vertical force is applied, and a moment is applied to the second portion 721. Even if this works, the surface 20b of the connecting member 20 and the boundary surface 722 interfere with each other. Thereby, since the movement to the rotation direction of the 2nd part 721 is prevented, it can prevent that the attachment member 710 rotates centering on the axis | shaft AX1 of the through-hole 714b.
In the above description, the connecting member 20 provided on the left outer mast 6L has been described as an example. However, the connecting member 20 may be provided on the right outer mast 6 or a pair of outer masts 6L. The mast 6 may be provided on both outer masts 6 respectively.

According to the embodiment described above, the following operational effects can be obtained.
(1) The attachment member 710 includes a first clamp member 711 to which the hydraulic hose 621 is attached, and a second clamp member 712 that sandwiches the hydraulic hose 621 together with the first clamp member 711. The first clamp member 711 has a first portion 720 in which one end of a surface 711c facing the surface 711a where the hydraulic hose 621 is sandwiched is cut out, and the structure of the outer mast 6 is formed in the first portion 720. It is attached to the connecting member 20 which is a thing. Thereby, since the attachment member 710 can take a cantilever support structure attached at one end of the first clamp member 711, compared with a case where the attachment member 710 is attached to the attachment member 710 at both ends of the first clamp member 711. The degree of freedom in routing the hose 621 increases, and the working efficiency is improved.
The first clamp member 711 has a first portion 720 and a second portion 721 that are different in the thickness direction (left-right direction) on the surface 711c on the back side of the surface 711a on which the hydraulic hose 621 is sandwiched, and has a thickness. The first member 720 having a small size is attached to the connecting member 20. As a result, as described above, the axis AX1 of the through-hole 714b is applied even when a vertical force for drawing the hydraulic hose 621 is applied by the first portion 720 formed in the first clamp member 711. The attachment member 710 can be prevented from rotating around the center.

(2) At least two mounting bolts 713 that fasten the first clamp member 711 and the second clamp member 712 sandwiching the hydraulic hose 621 are provided, and one mounting bolt 713b includes the first clamp member 711 and the second clamp member 712b. The first clamp member 711 and the second clamp member 712 are attached to the connecting member 20 by passing through the member 712 and being fastened to the connecting member 20. Thereby, since the attachment member 710 can be attached to the connection member 20 using one attachment bolt 713b, a cantilever support structure can be taken.

(3) The connecting member 20 to which the first clamp member 711 is attached is a member that fastens the chain 19 that moves the intermediate mast 12 up and down. Therefore, since the attachment member 710 is attached using an existing member, it is possible to form a space between the hydraulic hose 621 and the left outer mast 6L, and to arrange another configuration of the cargo handling device 5 in the space. become. As a result, the other configuration of the cargo handling device 5 and the hydraulic hose 621 can be prevented from interfering with each other.

The following modifications are also within the scope of the present invention, and one or a plurality of modifications can be combined with the above-described embodiment.
In the above-described embodiment, the mounting member 710 has been described with an example in which two hydraulic hoses 621 are sandwiched. However, the present invention is not limited to this, and one pipe may be sandwiched. More than one pipe may be sandwiched. In this case, it is preferable that attachment grooves corresponding to the number of pipes to be sandwiched are formed on the surfaces 711a and 712a of the first clamp member 711 and the second clamp member 712 facing each other.

Further, the attachment member 710 is not limited to the case where the attachment member 710 is attached to the connecting member 20, and the attachment member 710 can be attached to any structure constituting the cargo handling device 5. In this case, the surface 711c of the first clamp member 711 has a notch portion formed according to the shape of the attachment portion.
In addition, the first clamp member 711 has, instead of the first clamp member 711 having a stepped surface 711c shown in FIG. 3, for example, a convex portion 717 protruding in the left-right direction as shown in FIG. You may have in the surface 711c. In this case, the boundary surface 722a between the convex portion 713 and the first portion 720 interferes with the surface 20b of the connecting member 20, and the mounting member 710 can prevent the mounting member 710 from rotating about the axis AX1 of the through hole 714b. It becomes. FIG. 4 is a diagram for explaining an example of the attachment member according to the modification of the present invention, and description of the same reference numerals as those in FIG.
In the above-described embodiment, the full free mast is described as an example of the cargo handling device. However, a standard mast or a high mast that does not include the center cylinder 11 may be used.

  As long as the characteristics of the present invention are not impaired, the present invention is not limited to the above-described embodiments, and other forms conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention. .

DESCRIPTION OF SYMBOLS 1 ... Forklift 5 ... Cargo handling device 6 ... Outer mast 6L ... Left outer mast 7 ... Inner mast 8 ... Carriage 10 ... Lift cylinder 10L ... Left lift cylinder 11 ... Center cylinder 12 ... Intermediate mast 19 ... Chain 20 ... Connecting member 101 ... Piston Rod 111 ... Piston rod 710 ... Mounting member 711 ... First clamp member 712 ... Second clamp member 713 ... Mounting bolt 714, 715 ... Through hole 720 ... First part 721 ... Second part

Claims (5)

A forklift piping mounting member for mounting hydraulic piping for supplying and discharging hydraulic oil to a mast structure,
A first clamp member to which the hydraulic pipe is attached;
A second clamp member that sandwiches the hydraulic pipe together with the first clamp member,
The first clamp member has a notch portion at one end of the back surface of the surface on which the hydraulic piping is sandwiched, and is a forklift piping attachment member attached to the mast structure at the notch portion. In the forklift piping attachment member according to claim 1,
The first clamp member has, on the back surface of the surface where the hydraulic piping is sandwiched, one end portion and a portion other than the end portion having a larger size in the thickness direction than the end portion. A pipe attachment member for a forklift attached to the mast structure at an end portion of the forklift. In the pipe attachment member of the forklift according to claim 1 or 2,
Comprising at least two mounting bolts for fastening the first clamp member and the second clamp member sandwiching the hydraulic pipe;
One of the mounting bolts penetrates the first clamp member and the second clamp member and is fastened to the mast structure, thereby connecting the first clamp member and the second clamp member to the mast structure. Forklift pipe mounting members to be attached to objects. In the forklift pipe mounting member according to claim 3,
The first clamp member has a mounting groove along a direction in which the hydraulic piping is routed on a surface to which the hydraulic piping is mounted;
The second clamp member is a pipe mounting member of a forklift having a mounting groove along a direction in which the hydraulic pipe is routed on a surface to which the hydraulic pipe is mounted. In the pipe attachment member of the forklift according to any one of claims 1 to 4,
The first clamp member is a pipe attachment member of a forklift attached to a member that fastens a chain that raises and lowers the mast of the mast structure.

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