JPH02163295A - Inverting device for long lumber - Google Patents

Abstract

PURPOSE:To raise a packed long lumber from a horizontal position to a vertical position by arranging a clamping means for clamping both longitudinal sides and a rotating means such as rotary base on a supporting base. CONSTITUTION:A fork-lift F stands a main mast 1 straight, goes forward with two couples of clamping devices C opened vertically, and clamps a cargo T by closing respective clamping devices C through respective cylinders 7, coming into contact with one side surface of the cargo T and constrains the front of the cargo T by expanding respective jaws J fully through respective cylinders 13. Next a rotary base 5 is made to go up and the cargo T is floated from the ground, and the main mast 1 is inclined backwards to get ready for traveling transportation. When it goes near a given point in a forest area or the like, the rotary base 5 is lifted by a required amount, turned by 90 deg., and inclines the main mast 1 forward. Then the top of the cargo T is made to come into contact with a wall or the like to press the bottom end of the cargo T against the ground. Finally respective jaws J are retracted and the respective clamping devices C are opened to retract the fork-lift F.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is for converting long pieces of wood, particularly a plurality of tied pieces of wood, from a horizontal position on the ground, etc. to an inverted position, such as hanging on a wall. The invention relates to a device.

(Prior art) For example, at a lumber clothing store, etc., multiple sawn long planks, pillars, etc., bound/packed, are transported by truck or the like from a lumber wholesaler or a sawmill and placed horizontally on the ground. Conventionally, the work of converting an object placed in an upright position to an inverted (standing) position for use on a slope or for storage has been carried out entirely by manual labor.

[Problem to be solved by the invention]

However, among the various forms of this type of packaging, for example, in the case of 10XIO" (3 dimension square) pillar materials, the external dimensions of the packaging bound with polypropylene (PP) bands etc. are such that it can be placed horizontally on the ground! ! If placed, for example width! , 2M
Most of them have a height of 0.6 to 1.2'' and a length of 4 to 61 mm, and their total weight reaches a maximum of about 2 mm in the case of raw materials, making it extremely difficult for the above-mentioned inverted work. They were also forced to do dangerous work.

This invention was made in view of the problems of the conventional manual lifting (including transportation) method as described above.
The object of the present invention is to provide a powered cargo handling device for turning mainly packed long wood (hereinafter simply referred to as "cargo") from a horizontal position to an upright position.

[Means for Solving the Problems] Therefore, in the present invention, the front surface of a support base provided as a lift member of a forklift vehicle (hereinafter simply referred to as a "forklift") equipped with a tiltable lift means is provided. A rotating stand is provided above the forklift so as to be rotatable around one horizontal axis on the vertical center line of the forklift or its left and right proximal means, and the front side of the rotating stand is in contact with the front side. Clamping means for clamping both longitudinal sides of the load so as to be releasable from both sides is disposed substantially symmetrically with respect to the longitudinal center line of the long piece of wood serving as the load, and the support base The above objective is achieved by providing a rotating means on the top for rotationally driving the rotating table.

[Effect]

With the forklift attachment device as described above, as the forklift moves forward, the longitudinal direction and the side surface of the load placed substantially horizontally on the ground are brought into contact with the rotating table, and each of the clamping means The load is clamped and restrained from above and below, and the rotary table is lifted and tilted backwards in that position to make it ready for transportation. When the specified forest area, etc. is reached, the rotary table is lifted to the required height of the load. Then, by rotating the rotating table by substantially 90 degrees to either the left or right using the rotating means, the rotating table is turned into an inverted position. By tilting forward so that the upper end of the load is in contact with the rotating table, the rotary table is lowered to touch the ground, the clamping means is released, and the forklift is moved backwards, making it possible to stand the load in woodlots, etc., without requiring any manual labor. This can be done safely using power.

(Example) The present invention will be explained below based on examples.

(1) First embodiment (FIGS. 1 to 7) FIG. 1 is a side view illustrating the overall configuration of the first embodiment of the device of the present invention, and FIG. The perspective view, FIGS. 3(a) and 3(b) respectively show an enlarged view of part B of FIG. 2 and a plan view thereof.

(Configuration) In Fig. 1, F is a general conventional "forklift" (truck), which is equipped with a tiltable main mast 1 at the front of the vehicle body, and a lift member on the front of the mast 1. A support base 2 is attached to the main mast 1 so that it can be lifted up and down. Reference numeral 3 indicates a lift cylinder as a means for raising and lowering the lift, and reference numeral 4 indicates a piston rod thereof.

A circular rotating table 5 having a horizontal axis O on the front vertical center line of the forklift truck F is slidably and rotatably received by a circular flange section on the outer periphery of the supporting base 2, and is fixed to the supporting base 2. The axial displacement is restrained by the rotary table presser 2a.

Further, the horizontal axis O of the support base 2 is provided with a hydraulic actuator or a hydraulic rotary actuator M as a rotation means.
A rotary drive device such as
is fixed in the center. On the national side, the rotating means M and the rotating table 5 are directly connected, but it goes without saying that an appropriate speed reduction device may be interposed between them.

As shown in FIG. 6 (front view), which will be described later, on the front surface of the rotating table 5, bait markings are placed symmetrically with respect to the axis 0 in the direction of one diameter within the rotation plane of the rotating table 5. A pair of clamp devices C are disposed symmetrically on both sides with respect to the diameter, and the root portion 6a of each hollow clamp arm 6 extends within the linear guide portion a on the rotary table 5 to the diameter. They are constructed so that they can move in a straight line in opposition to each other. Each of these opposing clamp arms 6 compresses and holds the load T from the outside toward the inside, or compresses and holds the load T from the outside, respectively, by means of the piston rods 8 of the hydraulic cylinders 7 arranged in parallel and in opposite directions. You can release it.

Each of these clamp devices C has almost the same configuration,
As shown in FIG. 3, which is an enlarged view of the distal end, it consists of a diagonal 5-J that is telescopically disposed within each hollow arm 6, and each diagonal El
-J is a plurality of serial pieces with pin engagement between adjacent pieces! The pins 11 are arranged parallel to each other near the X-direction side that receives the load, and the Y-sides on the opposite side are in contact with each other at their contact surfaces 13. is configured to resist deformation and to be able to freely flex/bend in response to a load in the Y direction, that is, to have unidirectional flexibility.

Each of these pieces 10 remains chained and has a relatively large radius of curvature 12 at the tip. straight guide tube 1 with a
2, and each guide tube 12 is disposed within the hollow arm 6, respectively.

Each piece 10a at both ends of the chain jaw J.

Only 10b is each piece in the middle! 0 and abnormal shape,
The piece 10a at the tip is tapered, and the piece 10a at the rear end is tapered.
b is the piston rod 14 of the hydraulic cylinder 13 for expansion and contraction;
It is connected with a pin to the tip of the piston rod 14 and is configured to be able to expand and contract with the piston rod 14 and be housed in each guide tube 12, or to be able to extend and retract from the end 12a by a predetermined amount in the perpendicular Z direction.

In addition, the guide tube for each wrinkle J! 2 is not housed separately in the hollow arm 6 as in this embodiment,
It goes without saying that the structure may be integrated with the hollow arm 6.

(Operation) Next, the inverted operation sequence of the load T in two or more configurations will be described. 4 to 8 show schematic side views of each state of the above sequence, respectively. In each of these figures, the lift cylinder 3 behind the main mast 1 is omitted for simplification.

First, in Fig. 4, a load T of long wood bound with PP bands etc. is unloaded from a truck etc. and is placed on the ground (
GL) is placed horizontally on a pair of sleepers 20.

As shown in FIG. 4, the forklift F equipped with the attachment device according to the present invention advances 01 with the main mast upright and the two pairs of clamp devices C opened in the vertical direction. Close each clamping device C by each cylinder 7 with the weight of O almost matching the width center of the load T and approaching the midpoint of the length, and in contact with one side of the load T. Clamping and twisting each 5-J
are fully extended by each cylinder 13 to restrain the front of the load T.

Next, as shown in FIG. 5, the rotary table 5 is slightly raised to lift the load T off the ground, and the main mast 1 is tilted backwards, making it possible to travel and transport. When reaching a predetermined point in a forest, etc., as shown in FIG. 6, the rotating table 5 is lifted by the required amount and rotated substantially 90 degrees to either the left or right, and the horizontal load T is The load T becomes vertically inverted as shown in FIG. 7, and is then lowered to such an extent that the lower end of the load T does not touch the ground. In this state, the load T is transferred to a predetermined point in the forest, and the main mast 1 is tilted so that the top of the load T is brought into contact with the wall 21 or crosspiece 22, the lower end of the load T is grounded, and each jaw J By retracting the forklift truck F, opening each clamping device C, and retreating the forklift F, the load T can be safely placed in a predetermined position without requiring any manual work during the entire process.

(2) Second Embodiment (Figs. 9 and 10) Fig. 9 shows a view corresponding to Fig. 1 of the first embodiment of this invention, and Fig. 10 shows a front view thereof. , the same (equivalent) components as in FIGS. 1 to 8 of the first embodiment are represented by the same or equivalent symbols, and repeated explanations of individual components will be omitted.

(Configuration) The difference in configuration between this second embodiment and the first embodiment is that the shape of the support base 2A as a lift member is different, and it is located on the front vertical center line of the forklift or on the left side (or right side) thereof. A pin is provided on the longitudinal centerline OA at the bottom position, and a substantially square plate-shaped rotating table 5A is provided to be rotatable around the pin OA. On the rotary table 5A, each pair of clamp devices c similar to those shown in FIG. One end of a hydraulic cylinder 30 is pivotally connected to a point 2a at the lower end of the support base 2A, and the tip of the piston rod 31 is pivotally connected to a point 5a at the lower end of the rotating table. The rotary table 5A is configured to be able to rotate substantially 90 degrees by the expansion and contraction of the rotary table 5A.
The configuration is similar to that of the embodiment.

(Operation) Therefore, in the operation of this second embodiment, the support base 2 is changed to 2A in the explanation of FIGS. 4 to 8 showing the operation sequence of the first embodiment.

The explanation will be made in exactly the same manner by replacing the rotating table 5 with 5A, the center axis O with the pin OA, and the rotating means M with the cylinder/piston 30/31, so detailed explanation of IIA will be omitted.

Note that the rotating table, its rotating means, and clamp device shown in each of the above embodiments are not limited to these, and the same purpose can be achieved even if they have other modified shapes. can.

Furthermore, in each of the above embodiments, the operation of changing from the horizontal position on the ground to the standing position has been described, but for example, the bundled cargo T may be reloaded onto a truck or the like for sale, etc. Of course, it can also be applied to the reverse conversion operation if necessary.

〔Effect of the invention〕

As explained above, according to the present invention, since the forklift that can lift and tilt is provided with a rotating table having a releasable clamp device and a support base having a rotating means for the rotating table at the front part of the forklift that can be lifted and tilted, The long timber load placed on the ground is restrained from the sides in the longitudinal direction by the above-mentioned clamping device, and the rotating table is rotated in either the left or right direction by the above-mentioned rotating device to stand it upside down and move it to the desired location. Transporting and driving,
All the work up to hanging it up against a wall etc. can now be done safely and easily without the need for manual labor.

[Brief explanation of the drawing]

FIG. 1 is a side view of the configuration of a first embodiment of the long wood inversion device according to the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. ) is an enlarged view of part B in FIG. 2 and its plan view, FIGS. 4 to 8 are side views of each operating state, and FIG.
The corresponding figure, Figure 1θ, is a front view thereof. F---Forklift vehicle T-11 load (long wood) C・----Clamp device J・----Jaw 0---Horizontal axis 0A----Pin 2.2A--- ---Support base (lifting member) 10-
--- Piece 11 --- Pin 12 --- Guide tube

Claims (4)

[Claims] (1) On the front surface of a support base as a lifting member of a forklift vehicle equipped with a tiltable lifting means, it can be rotated around one horizontal axis on the front vertical center line of the forklift, or a parallel line adjacent to the left and right of the forklift. A rotary table is provided, and the front surface of the rotary table is substantially symmetrical with respect to the longitudinal centerline of the long timber as a load, with one longitudinal side abutting on the front surface. Clamp means for clamping both sides of the load in the longitudinal direction so as to be releasable from both sides, and a rotation means for rotationally driving the rotation table is provided on the support base. A device for inverting long pieces of wood. (2) Claim 1, wherein the rotation means comprises a rotation drive device provided at a horizontal axis on the support member.
The device for inverting long wood as described. (3) The apparatus for inverting a long piece of wood according to claim 1, wherein the rotating means comprises a cylinder device disposed between the support base and the rotating table. (4) The clamping means is telescopically accommodated in the guide tube by a cylinder device, and has a chain-like jaw member composed of a plurality of piece members each connected with a pin so as to have flexibility in one direction. The elongated wood inversion device according to any one of claims 1 to 4, characterized by: