JP2009179467A - Cylinder coupling device of cargo-handling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily adjust an attaching position of a piston rod to a movable member in a short period of time. <P>SOLUTION: A coupling block 22 is fixed opposite an inner mast 13, a wedge member 23 is slidably arranged in a sliding chamber 31 formed for the coupling block 22 orthogonally to an in-and-out axis O, a long hole 23c in a sliding direction is formed in the wedge member 23 and a mounting hole 32 to which a piston rod 11a is fit is formed in the coupling block 22. A fixing bolt 24 capable of fixing the piston rod 11a via the long hole 23c of the wedge member 23 and an adjusting bolt 25 capable of regulating position of the wedge member 23 are provided for the coupling block 22, a tapered surface 23a inclined at a wedge angle θ is formed in a bottom surface of the wedge member 23 and a tapered receiving surface 11b inclined at the wedge angle θ is formed in a tip end surface of the piston rod 11a contacted with the tapered surface 23a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cylinder coupling device for a cargo handling vehicle capable of adjusting a mounting position of a piston rod of a cargo handling cylinder such as a lift cylinder in a cargo handling vehicle such as a forklift.

For example, Patent Document 1 discloses a mounting adjustment device that connects and fixes a piston rod of a lift cylinder in a forklift to a mast beam of an inner mast.
In this mounting adjustment device, a mounting hole into which the tip of the piston rod is fitted is drilled in the lower surface of the mast beam, and a female screw hole is formed through the upper surface of the mast beam from the upper surface of the mounting hole. The adjustment screw cylinder is fitted. Then, the fixing bolt is inserted into the shaft hole of the adjusting screw cylinder and screwed into the female screw hole of the piston rod head. By tightening the fixing bolt, the mast beam, the adjusting screw and the piston rod are fixed. Yes.
Japanese Utility Model Publication No. 5-37898

  However, the piston rod position adjustment operation requires removing the fixing bolt, then turning the adjustment screw cylinder with a special tool to move it back and forth, and then mounting the fixing bolt again. There was a problem that it took.

  An object of the present invention is to solve the above problems and to provide a cylinder coupling device for a cargo handling vehicle that can easily and quickly adjust the mounting position of a piston rod to a movable member.

  The invention according to claim 1 is a cylinder coupling device of a cargo handling vehicle capable of adjusting an attachment position to a movable member to which a piston rod of a cargo handling cylinder is coupled, wherein a coupling block is opposed to the piston rod on the movable member. A wedge member is slidably disposed in a sliding chamber formed in the connecting block in a direction perpendicular to the piston rod's retracting axis, and a long hole in the sliding direction is formed in the wedge member. A mounting hole that penetrates the sliding block from the facing surface of the piston rod into the connecting block and is fitted with the piston rod, and extends from the sliding chamber to the non-facing surface of the piston rod. A fixing tool that can be fixed through the hole, and an adjustment tool that is provided so as to be freely retractable in the sliding direction of the wedge member from the sliding chamber so that the position of the wedge member can be regulated. Slides at opposite wedge angles on opposite surfaces And a tapered receiving surface inclined in the same direction as the tapered surface at the wedge angle is formed on the tip surface of the piston rod that is in contact with the tapered surface through the mounting hole. It is a thing.

  The invention according to claim 2 is a cylinder coupling device of a cargo handling vehicle capable of adjusting an attachment position to a movable member to which a piston rod of a cargo handling cylinder is coupled, wherein a coupling block is opposed to the piston rod on the movable member. A wedge member is slidably disposed in a sliding chamber formed in the connecting block in a direction perpendicular to the piston rod's retracting axis, and a long hole in the sliding direction is formed in the wedge member. A mounting hole that penetrates the sliding block from the facing surface of the piston rod into the connecting block and is fitted with the piston rod, and extends from the sliding chamber to the non-facing surface of the piston rod. A fixing tool that can be fixed through a hole; and an adjustment tool that is provided so as to be freely retractable from the sliding chamber in the sliding direction of the wedge member so that the position of the wedge member can be regulated. On the opposite side of the formation surface of the A tapered receiving surface which is inclined to the moving direction, the wedge member facing said tapered receiving surface is obtained by forming a tapered surface which is inclined in the same direction of the tapered abutment with the wedge angle.

  According to the first aspect of the present invention, the fixing tool is loosened, the adjusting tool is withdrawn and retracted to displace the restricting position of the wedge member, and the wedge angle is adjusted by the action of the tapered surface of the wedge member and the tapered receiving surface of the piston rod. The position of the piston rod attached to the movable member can be adjusted by displacing the contact position of the piston rod with the wedge member in the protruding and retracting axial direction within the displacement range in the protruding and retracting axial direction due to the gradient. Thereby, the attachment position to the movable member of a piston rod can be adjusted easily and in a short time.

  According to the second aspect of the present invention, the fixing tool is loosened, the adjusting tool is moved back and forth to displace the restricting position of the wedge member, and the wedge angle is obtained by the action of the tapered surface of the wedge member and the tapered receiving surface of the sliding chamber. The piston rod mounting position can be adjusted by displacing the contact position of the piston rod with the wedge member in the protruding and retracting axial direction within the displacement range of the retracting and retracting axis direction due to the gradient of. Thereby, the attachment position to the movable member of a piston rod can be adjusted easily and in a short time.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Embodiment 1]
A first embodiment of a cylinder coupling device for a cargo handling vehicle according to the present invention will be described with reference to FIGS.

  In FIG. 3, a cargo handling device provided at the front of a vehicle body of a forklift that is a cargo handling vehicle includes a pair of left and right outer masts 12, and an inner mast (movable member) 13 guided between the outer masts 12 so as to be movable up and down. A carriage (not shown) disposed between the inner masts 13 so as to be movable up and down, a winding double speed mechanism (not shown) for driving the carriage up and down, and a pair of left and right lift cylinders (up and down driving the inner mast) Loading cylinder) 11. The winding-type double speed mechanism connects a lifting chain (not shown) from the bottom of the outer mast 12 to a carriage via a sprocket (not shown) rotatably supported on the upper part of the inner mast 13, By extending and retracting the lift cylinder 11 and moving the inner mast 13 up and down, the cargo handling fork is lifted and lowered via the winding type double speed mechanism and the carriage.

  The lift cylinder 11 is supported by the lower part of the outer mast 12 via an attachment member, and the piston rod 11a of the lift cylinder 11 is connected to the inner mast 13 via the connecting device 21 according to the present invention.

  As shown in FIGS. 1 and 2, the connecting device 21 has a connecting block 22 attached to a predetermined position of the inner mast 13, and a wedge member 23 is connected to a sliding chamber 31 formed in the connecting block 22 with a piston rod. It is slidably arranged in the front-rear direction (sliding direction) perpendicular to the extending and retracting axis O of 11a. The wedge member 23 has a long hole 23c extending in the vertical direction along the front-rear direction. Further, a mounting hole 32 is formed in the connecting block 22 so as to pass through the sliding chamber 31 from the bottom surface (opposite surface of the piston rod 11a) along the extending / retracting axis O and the piston rod 11a is removably fitted. Yes. Further, a fixing bolt hole 33 is formed through the connecting block 22 from the sliding chamber 31 to the top surface (the opposite surface of the piston rod 11a) along the protruding and retracting axis O, and the protruding and retracting shaft extends from the sliding chamber 31 to the rear surface. An adjustment bolt hole 34 is formed through in a direction perpendicular to the center O. The fixing bolt hole 33 is provided with a fixing bolt (fixing tool) 24 to be attached to the fixing screw hole 11c of the piston rod 11a through the elongated hole 23c of the wedge member 23. An adjustment bolt (adjustment tool) 25 with a lock nut 25a capable of restricting the position by protruding the portion into the sliding chamber 31 and contacting the rear surface of the wedge member 23 is screwed.

  The wedge member 23 has a trapezoidal block shape with a thicker portion at the rear, and the top surface is formed on a slide surface 23b orthogonal to the protrusion / retraction axis O. It is formed on the tapered surface 23a.

  Further, a tapered receiving surface 11b is formed at the tip of the piston rod 11a with a wedge angle: θ and inclined in the same direction as the tapered surface 23a with respect to the surface orthogonal to the extending and retracting axis O, and the tapered receiving surface 11b. The fixing screw hole 11c is formed at the position of the protruding and retracting axis O.

  The connection block 22 is formed in a substantially rectangular parallelepiped shape, and is fixed to the inner mast 13 via a fixing tool (not shown) such as a bolt. A sliding chamber 31 is formed in the connecting block 22 so as to penetrate the left and right side surfaces. The sliding chamber 31 has a top surface formed on a guide surface 31a orthogonal to the extending and retracting axis O, and a bottom surface serving as a guide. It is formed in a tapered guide surface 31b inclined in the front-rear direction at a wedge angle: θ with respect to the surface 31a, and is configured in a trapezoidal space. And the wedge member 23 is arrange | positioned in the sliding chamber 31 so that sliding is possible in the front-back direction along the guide surface 31a via the slide surface 23b.

  Therefore, when adjusting the mounting position of the piston rod 11a to the inner mast 13, first, the fixing bolt 24 is loosened, then the lock nut 25a is loosened, and then the adjusting bolt 25 is retracted to adjust the restricting position of the wedge member 23. To do. For example, as shown in FIG. 1A, when the adjustment bolt 25 is protruded and the wedge member 23 is pushed forward, the piston rod is moved by the action of the taper surface 23a of the wedge member 23 and the taper receiving surface 11b of the piston rod 11a. The contact surface of 11a with the wedge member 23 is displaced downward. Then, by tightening the fixing bolt 24, the mounting position of the piston rod 11a is displaced in the development direction. Further, as shown in FIG. 1B, after the adjustment bolt 25 is retracted, the fixing bolt 24 is tightened, whereby the wedge member 23 is retracted, and the piston rod 11a is operated by the action of the taper surface 23a and the taper receiving surface 11b. The abutting surface to the wedge member 23 is displaced upward. Then, by tightening the fixing bolt 24, the mounting position of the piston rod 11a is displaced in the contraction direction.

As a result, the piston rod 11a can be attached with the inner mast 13 adjusted at a uniform position corresponding to the retracted position of the left and right lift cylinders 11.
According to the first embodiment, the fixing bolt 24 attached to the connecting block 22 is loosened, and the regulation position of the wedge member 23 is displaced by the adjustment bolt 25 within the range of the adjustment stroke S (the length of the long hole 23c). By the action of the wedge angle: θ between the tapered surface 23a of the wedge member 23 and the tapered receiving surface 11b of the piston rod 11a, the contact position of the piston rod 11a with the wedge member 23 is displaced vertically within the range of the adjustment stroke: β. Thus, the mounting position can be adjusted. Then, the connecting bolt 22, the wedge member 23, and the piston rod 11a may be fixed to each other by tightening the fixing bolt 24. Thereby, the attachment position to the inner mast 13 of the piston rod 11a can be adjusted easily and in a short time.
[Embodiment 2]
FIG. 4 shows a second embodiment of a cylinder coupling device for a cargo handling vehicle. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The cylinder coupling device 41 is configured such that the wedge member 23 is arranged upside down. That is, the wedge member 23 is formed on the slide surface 23d whose bottom surface is orthogonal to the retracting axis O, and the top surface is formed on the tapered surface 23e inclined at the wedge angle: θ above the rear surface with respect to the slide surface 23d. ing.

The sliding chamber 31 is formed with a taper receiving surface 31c whose top surface is inclined at a wedge angle: θ above the rear portion, and a bottom portion is formed on a sliding surface 31d orthogonal to the retracting axis O.
Furthermore, the tip of the piston rod 11a is formed on an abutment surface 11d orthogonal to the extension / retraction axis O and abuts on the slide surface 31d.

  In the above configuration, when adjusting the mounting position of the piston rod 11a with respect to the inner mast 13, first, the fixing bolt 24 is loosened, then the lock nut 25a is loosened, and then the adjusting bolt 25 is moved back and forth to set the restricting position of the wedge member 23. adjust. For example, as shown in FIG. 4A, when the adjustment bolt 25 is protruded and the wedge member 23 is pushed forward, the connecting block is formed by the action of the tapered surface 23e of the wedge member 23 and the tapered receiving surface 31c of the sliding chamber 31. 22 is pushed up. Then, by tightening the fixing bolt 24, the mounting position of the piston rod 11a is displaced in the development direction. Further, as shown in FIG. 4B, after the adjustment bolt 25 is retracted, the fixing member 24 is tightened to retract the wedge member 23, and the taper surface 23 e and the taper receiving surface 31 c of the sliding chamber 31 act. Thus, the connecting block 22 is pulled down. Thereby, the attachment position of the piston rod 11a is displaced in the contraction direction.

Thereby, the piston rod 11a can be adjusted and attached to the inner mast 13 at an equal position corresponding to the retracted position of the left and right lift cylinders 11.
According to the above embodiment, the fixing bolt 24 attached to the connecting block 22 is loosened, and the regulating position of the wedge member 23 is displaced by the adjusting bolt 25 within the range of the adjusting stroke S (the length of the long hole 23c). The contact position of the piston rod 11a with the wedge member 23 is displaced within the range of the adjustment stroke β by the action of the wedge angle θ of the tapered surface 23e of the wedge member 23 and the tapered receiving surface 31c of the sliding chamber 31. The mounting position can be adjusted. Then, the connecting bolt 22, the wedge member 23, and the piston rod 11a may be fixed to each other by tightening the fixing bolt 24. Thereby, the attachment position to the inner mast 13 of the piston rod 11a can be adjusted easily and in a short time. Moreover, it is not necessary to process the front-end | tip part of the piston rod 11a of the lift cylinder 11 which uses ready-made goods.

  In the first and second embodiments, the sliding direction of the wedge member 23 is the front-rear direction of the vehicle body, but it may be the width direction.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view which shows Embodiment 1 of the cylinder coupling device of the cargo handling vehicle which concerns on this invention, (a) shows the advance limit of a wedge member, (b) shows the retreat limit of a wedge member. It is a disassembled perspective view of a connection device. It is a disassembled perspective view which shows the installation state of a connection apparatus. It is a longitudinal cross-sectional view which shows Embodiment 2 of the cylinder coupling device of the cargo handling vehicle which concerns on this invention, (a) shows the advancing limit of a wedge member, (b) shows the backward limit of a wedge member.

Explanation of symbols

O Retract axis 11 Lift cylinder (carrying cylinder)
11a Piston rod 11b Tapered receiving surface 11c Fixing screw hole 13 Inner mast (movable member)
21 connecting device 22 connecting block 23 wedge member 23a taper surface 23b slide surface 23c long hole 24 fixing bolt (fixing tool)
25 Adjustment bolt (Adjustment tool)
31 Sliding chamber 31a Guide surface 31b Tapered guide surface 32 Mounting hole 33 Fixing bolt hole (fixing hole)
34 Adjustment bolt hole (Adjustment hole)
41 connecting device 11d contact surface 23d slide surface 23e taper surface 31c taper receiving surface 31d slide surface

Claims (2)

A cylinder coupling device for a cargo handling vehicle capable of adjusting an attachment position to a movable member to which a piston rod of a cargo handling cylinder is coupled,
On the movable member, fix the connecting block facing the piston rod,
In the sliding chamber formed in the connecting block, a wedge member is slidably arranged in a direction perpendicular to the piston rod's retracting axis, and a long hole in the sliding direction is formed in the wedge member.
A mounting hole that penetrates the sliding block from the facing surface of the piston rod to the sliding chamber and fits the piston rod into the connecting block, and a piston rod that extends from the sliding chamber to the opposite surface of the piston rod and that is a long hole in the wedge member And a fixing tool that can be fixed via the sliding chamber, and an adjustment tool that is provided so as to be freely retractable in the sliding direction of the wedge member from the sliding chamber and can regulate the position of the wedge member,
Forming a tapered surface inclined in a sliding direction at a predetermined wedge angle on a surface facing the mounting hole of the wedge member;
A cylinder coupling device for a cargo handling vehicle, wherein a tapered receiving surface that is inclined in the same direction as the tapered surface at the wedge angle is formed on a tip surface of a piston rod that is in contact with the tapered surface through the mounting hole. . A cylinder coupling device for a cargo handling vehicle capable of adjusting an attachment position to a movable member to which a piston rod of a cargo handling cylinder is coupled,
On the movable member, fix the connecting block facing the piston rod,
In the sliding chamber formed in the connecting block, a wedge member is slidably disposed in a direction perpendicular to the piston rod's retracting axis, and a long hole in the sliding direction is formed in the wedge member.
A mounting hole that penetrates the sliding block from the facing surface of the piston rod to the sliding chamber and fits the piston rod into the connecting block, and a piston rod that extends from the sliding chamber to the opposite surface of the piston rod and that is a long hole in the wedge member And a fixing tool that can be fixed via the sliding chamber, and an adjustment tool that is provided so as to be freely retractable in the sliding direction of the wedge member from the sliding chamber and can regulate the position of the wedge member,
A taper receiving surface inclined in a sliding direction at a predetermined wedge angle is formed on the surface opposite to the surface where the mounting hole is formed in the sliding chamber,
A cylinder coupling device for a cargo handling vehicle, wherein a taper surface inclined in the same direction of the taper receiving surface at the wedge angle is formed on a wedge member facing the taper receiving surface.

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