JP2006321598A - Three-direction stacking truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-direction stacking truck capable of solving a problem that, when a vehicle advances between racks L, an operator performs the driving operation while checking a guide roller 14 from a driver's seat 4, a support arm 36 forms a cause to impair the view of the operator; the operator must collapse his body every time when the vehicle advances between the racks L to check the guide roller 14, which causes the physical burden on the operator. <P>SOLUTION: The three-direction stacking truck comprises a standing seat type vehicle body 1, a driver's seat 4 in which an operator rides on a rear part of the vehicle body, a mast 2 erected along the vertical direction on a front part of the vehicle body 1, and a pair of right and left support arms 36 to support and fix the mast 2 between a front part of the vehicle body and the mast 2. A recess 40 is formed inward of the vehicle body on a part of a side face or the entire side face outside the vehicle body of the support arms 36. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a three-way stacking truck, and more particularly, to a three-way stacking truck provided with a standing-type vehicle body that an operator stands and operates.

  The three-way stacking truck is generally a forklift that is used to run between racks that store loads, and to handle loads loaded between racks, so that operators can easily get on and off. It is a forklift with a standing body.

  In the forklift, a reach leg for supporting the vehicle body extends forward from both the left and right sides of the vehicle body. A guide roller is provided for smoothly running the vehicle. A mast standing in the vertical direction is provided at the front portion of the forklift, and a three-way loading fork that can be raised and lowered is provided on the mast. The three-way loading fork is a fork for freely changing the direction of the fork even between narrow racks and handling the cargo stored in the rack, and is a side shift mechanism that slides in the left-right direction. And a rotation mechanism that rotates the direction of the fork around a vertical axis.

Since the three-way loading fork provided on the mast is much heavier than a general L-shaped fork, the mast will fall forward unless the mast is supported and fixed to the vehicle body. In addition, if the mast is not supported perpendicularly to the vehicle body, an error will increase in the operation of the pickup or the like in proportion to the fork rising along the mast. Therefore, a support arm for supporting and fixing the mast along the vertical direction is provided between the front portion of the vehicle body and the mast. For example, it is disclosed in Patent Document 1 below.
JP 2002-87782 A

  In the forklift, when entering between racks, the operator operates the vehicle while visually observing the guide roller in a posture standing from the rear of the driver seat of the vehicle body, or the operator does not contact the rack column supporting the rack. Further, since there is only a passage width that allows the vehicle body to pass between the racks in order to place as much load as possible, the confirmation work of the guide rollers is important.

  However, in the confirmation operation, the support arm is located between the operator's eye line and the guide roller, which is a cause of hindering the operator's field of view. Therefore, the operator has to check the guide roller in a posture in which the body is laid down and gets out of the driver's seat. For this reason, every time the player enters between the racks, a physical burden is placed on the operator, and the fatigue accumulated by the operator also affects the work efficiency.

  Accordingly, an object of the present invention is to provide a three-way stacking truck that solves such problems and prevents a reduction in work efficiency.

  In order to achieve the above object, as a first invention, a standing seat type vehicle body, a driver's seat on which an operator gets on the rear portion of the vehicle body, and a mast erected vertically along the front portion of the vehicle body, In a three-way stacking truck comprising a pair of left and right support arms for supporting and fixing the mast between the vehicle body front part and the mast, A three-way stacking track is provided, which is provided with a recess toward the head.

  According to the above three-way stacking truck, the operator can visually observe the guide roller from the position of the operator who has boarded the driver's seat without having to lie down on his / her side.

  Further, as a second invention, a standing-type vehicle body, a driver's seat on the rear side of the vehicle body on which one of the left and right sides is boarded, a mast erected along the vertical direction at the front portion of the vehicle body, In a three-way stacking truck comprising a pair of left and right support arms for supporting and fixing the mast between the vehicle body front part and the mast, A three-way stacking track is provided, which is provided with a recess toward the head.

  According to the above-described three-way stacking truck, the operator can visually observe the guide roller on the side where the operator is standing from the position of the operator who has boarded the driver's seat without having to tilt the body sideways.

  According to the three-way stacking truck according to the present invention, the operator directly views the guide roller from the rear part of the driver's seat by providing a recess toward the inside of the vehicle body on a part or all of the side surface of the support arm outside the vehicle body. Because it is not necessary for the operator to check the guide roller while tilting the body sideways and breaking the posture every time it enters between racks, the physical burden is reduced and the operator's fatigue is also accumulated. It is possible to reduce the work efficiency and prevent the work efficiency from being lowered.

  First, the basic configuration of the three-way stacking track according to the present invention will be described. As shown in FIG. 1 and FIG. 2, the three-way stacking truck is installed in a vertical direction at the front of the vehicle body 1 and a front body of the vehicle body 1 that can be operated by an operator. The mast 2 and a three-way loading fork 3 that moves up and down along the mast 2 are provided.

  A driver's seat 4 on which an operator can board is provided on the rear right side of the vehicle body 1, and a drive wheel 5 having a steering function and a drive function is provided on the rear left side. A head guard 6 that is a protective frame for protecting the operator from falling objects is provided above the driver seat. A caster wheel 7 is attached to the lower part of the driver's seat 4 and handles a load that can be rotated back and forth along with the drive wheel 5.

  A battery chamber 8 in which a battery serving as a power source for the vehicle can be installed and a control chamber 9 in which a control unit for controlling the vehicle can be arranged are provided at the front of the vehicle body 1. The control chamber 9 is disposed above the battery chamber 8. Various control levers 10 for operating the vehicle are arranged at the upper part of the control chamber 9. A steering handle 11 for rotating around the vertical axis to steer the drive wheel 5 is provided at the upper part of the drive wheel 5. is set up.

  A pair of left and right reach legs 12 are fixed to the front from the left and right sides of the lower end of the frame of the vehicle body 1 at the front of the battery chamber 8. Wheels 13 are provided at the front and rear. In addition, a guide roller 14 that rotates around a vertical axis is installed on the outside of the vehicle body of the road wheel 13. In addition, guide rollers 15 that rotate around a vertical axis are also installed on the left and right sides of the vehicle body 1.

  Next, the mast 2 will be described. The mast 2 is composed of a pair of left and right outer masts erected along a vertical direction from a substantially middle position of the reach leg 12 and an inner mast 17 that can be moved up and down along the inner side of the outer mast 16. Yes. The lower end of the outer mast 16 is supported and fixed to the reach leg 12 via a mast support 18. Further, an upper cross beam 19 which is a horizontal beam for connecting and supporting the outer masts 16 from the left and right side surfaces and horizontally supporting them is provided at the upper ends of the pair of left and right outer masts 16. A middle cross beam 20 that connects the pair of left and right outer masts 16 from the left and right side surfaces is provided below the upper cross beam 19 and in the middle of the upper and lower sides of the outer mast 16. Between the middle cross beam 20 and the inner mast 17, there is provided a lift cylinder 21 standing vertically along the mast, and the rod is moved up and down along the inside of the lift cylinder 21. The inner mast 17 fixed to the upper end of the rod moves up and down along the outer mast 16.

  Here, the three-way loading fork 3 will be described. As shown in FIG. 3, the above-described three-way loading fork 3 is attached to the front portion of the inner mast 17 via a lift bracket 22, and lifting guide rollers 23 are provided on both the left and right sides of the lift bracket 23. It has been. The lift bracket 23 is lifted and lowered together with the inner mast 17 so that the three-way loading fork 3 is lifted and lowered. The lift bracket 22 is moved up and down by the guide roller 23 inside the inner mast 17 through a chain. The three-way loading fork 3 includes a head 24 that can be attached to the lift bracket 22, a side shift mechanism 25 that slides the head 24 in the left-right direction, and a pair of left and right forks at the front of the head 24. Rotating mechanism 27 that rotates about 26 vertical axes. Guide rails 28 are provided horizontally at the upper and lower ends of the lift bracket 22 in the left-right direction, and the head 24 is interposed via a shift guide roller 29 that rolls along the pair of upper and lower guide rails 28. Is attached. The guide rail 28 extends from side to side to the left and right ends of the reach leg 12. Thus, the head 24 can be stably slid to the left and right ends of the vehicle body.

  The side shift mechanism 25 includes a pair of upper and lower racks 30 provided on the front surface of the lift bracket 22, a pinion gear 31 meshed with the rack 30, and a side shift shaft 32 that is rotatable about a vertical axis including the pinion gear 31. And a shift motor 33 that rotates the side shift shaft 32. The rotation mechanism 27 includes a rotation shaft 34 that can rotate around a vertical axis that supports the fork 26, and a rotation motor 35 that rotates the rotation shaft 34.

  Here, the operation of the fork 26 will be described. When the shift motor 33 is driven, the head 24 slides between the vehicle widths along the rack 30 via the pinion gear 31. Further, the guide roller 29 rotates along the guide rail 28, so that the head 24 can be side-shifted smoothly. Further, when the rotation motor 35 is driven, the rotation shaft 34 rotates, and the fork 26 supported by the rotation shaft 34 rotates around the vertical axis. By doing so, as shown in FIG. 4, the fork 26 can freely slide left and right between the vehicle widths, and the fork 26 can freely rotate from left to right.

  As shown in FIG. 5, a support arm 36 that supports and fixes the mast 2 along the vertical direction is provided between the vehicle body 1 and the mast 2. The support arm 36 includes an arm main body 37 extending from the vehicle body 1 toward the mast 2, a side plate 38 that is a part of a side surface portion of the arm main body 37 and is fixed in contact with the side surface of the vehicle body 1, A lower plate 39 that protrudes horizontally from the rear part of the arm body 37 and is fixed in contact with the upper part of the battery chamber 8, and a notch 40 that is outside the vehicle body of the arm body and near the mast are provided. ing. The recess 40 has a shape in which a part of the support arm 36 is recessed from the middle toward the mast 2 side from the vehicle body 1 side. The upper surface of the arm body 37 is formed to be lower than the upper end of the side plate 38.

  Between the battery chamber 8 and the control chamber 9, a partition plate 41 for horizontally partitioning both chambers and installing a control unit is provided horizontally. The support arms 36 are installed on the left and right sides of the side of the vehicle body, where the body frame 42 covers the left and right sides of the vehicle body 1 and the partition plate 41. The side plate 38 is fixed to the body frame 42, and the lower plate 39 is fixed to the partition plate 41.

  The support arm 36 extends from the vehicle body 1 toward the mast 2, and the side surface outside the vehicle body of the support arm 36 is recessed toward the inside of the vehicle body. Since the support arm 36 has the recess 40, the midway portion of the support arm 36 becomes larger as it goes from the vehicle body side to the mast side. The mast side end of the support arm 36 is connected to the rear part of the middle cross beam 20 that supports the pair of left and right outer masts 16.

  Since the corners of the body frame 42 and the partition plate 41 between the battery chamber 8 and the control chamber 9 are strong, the support arm 36 is fixed at this position. Thus, the strength enough to support the mast 2 vertically can be maintained.

  An operator who operates the vehicle gets on the driver's seat 4 and operates the various operation levers 10 with the right hand and operates the steering handle 11 with the left hand. The operator can drive the drive wheel 5 to drive the vehicle by operating various operation levers 10, and can move the rod of the lift cylinder 21 up and down, and can also operate the shift motor 33 and the rotate. By operating the motor 35, the position and orientation of the fork 26 can be manipulated. The operator can change the traveling direction of the vehicle by changing the direction of the drive wheel 5 by rotating the steering handle 11.

  In the three-way stacking truck according to the present invention having the support arm 36, the field of view A when the operator directly looks at the guide roller 14 on the right front side from the driver's seat 4 will be described. As shown in FIGS. 6 and 7, the visual field A of the operator passes from the upper side of the vehicle body 1 through the recess 40 of the support arm 36 and from the right side surface of the middle cross beam 20 to a pair of upper and lower guides of the lift bracket 22. It passes between the rails 28 and can reach the guide roller 14. By lowering the upper surface of the arm body 37 closer to the partition plate 41, the range that blocks the view of the operator when the guide roller 14 is viewed from above the driver's seat can be narrowed. Further, at this time, if the head 24 is at the right end, it may disturb a part of the field of view of the operator, so it is more desirable that the head 24 is located on the left side.

  Here, the case of entering between racks by the three-way stacking truck according to the present invention will be described. When the vehicle body 1 enters the rack width L, the three-way loading fork 3 is positioned within the vehicle body 1 width, and then the forklift is moved to a position facing the rack width L to enter. At that time, the operator advances the forklift while visually checking the guide roller 14 at the lower right front from the driver's seat 4 and confirming that it does not collide with the rack. When the vehicle body width is within the rack width L, the guide roller 14 and the guide roller 15 come into contact with the rack guide rail installed at the lower part of the rack, so that the rack can run smoothly. it can. In addition, the three-way stacking truck cannot change the direction of the vehicle body 1 within a narrow rack, but by operating the operation lever 10 described above, the direction and position of the fork 26 can be changed to perform the cargo handling work. It can be carried out.

  According to the three-way stacking truck according to the present invention, the field of view A where the operator sees the guide roller 14 standing in the driver's seat 4 is not obstructed by the support arm 36, so that the operator can stand without breaking his posture. The guide roller 14 can be visually recognized. Therefore, the physical burden on the operator can be reduced, the accumulation of operator fatigue can be reduced, and the effect of preventing a reduction in work efficiency can be exhibited.

  In the support arm 36, the shape in which a part of the support arm 36 is recessed from the vehicle body 1 side to the mast 2 side has been described. However, the shape may be recessed on the inner side of the vehicle body.

  Further, by providing the left side support arm 36 shown in FIG. 5 and the support arm 36 provided with a dent 40 symmetrical to the left and right sides of the vehicle body, when the fork 26 unloads on the left side of the vehicle body, the driver's seat 4 By reducing the number of places that obstruct the operator's field of view, it is easy to visually recognize whether or not the tip of the fork 26 has been inserted into the pallet. It is also effective when unloading.

  Further, by fixing the support arm 36 at the corners of the strong body frame 42 and the partition plate 41, it is possible to prevent the mast 2 from falling forward due to the weight of the three-way loading fork 3.

It is a side view of the three-way stacking truck concerning the present invention. It is a top view of the three-way stacking track according to the present invention. It is a block diagram of a three-way loading fork. It is operation | movement explanatory drawing of a head and a fork. It is an external appearance perspective view of the left support arm. It is a top view showing a field of view when the guide roller is directly viewed from an operator's driver's seat. It is a side view showing a field of view when the guide roller is directly viewed from the operator's driver's seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Mast 3 Three-way loading fork 4 Driver's seat 8 Battery compartment 9 Control room 12 Reach leg 14 Guide roller 16 Outer mast 18 Mast support 19 Upper cross beam 20 Middle cross beam 22 Lift bracket 24 Head 25 Side shift mechanism 26 Fork 27 Rotate Mechanism 28 Guide rail 36 Support arm 37 Arm body 38 Side plate 39 Lower plate 40 Recess A View field L Rack width

Claims (2)

A stand-up type vehicle body, a driver's seat on which the operator gets on the rear of the vehicle body, a mast that is erected in the vertical direction at the front of the vehicle body, and the mast between the vehicle body front portion and the mast In a three-way stacking truck having a pair of left and right support arms for supporting and fixing,
A three-way stacking truck, wherein a part or all of a side surface of the support arm on the outer side of the vehicle body is provided with a recess toward the inner side of the vehicle body. Standing-type vehicle body, a driver's seat at the rear of the vehicle body on either one of the left and right sides, a mast standing vertically along the front of the vehicle body, the vehicle body front portion and the vehicle body In a three-way stacking truck having a pair of left and right support arms for supporting and fixing the mast between the mast,
A three-way stacking truck, wherein a part or all of a side surface of the support arm on the outer side of the vehicle body is provided with a recess toward the inner side of the vehicle body.

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