JP2007131256A - Carriage for product inversion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive carriage for product inversion in which a product inversion direction is coincident with a conveying direction and is not limited by a cross section shape of the product, expertise is not required for operation and the product can be safely reversed. <P>SOLUTION: In the hand carriage 1 with a lift table 15, a product receiver provided with two perpendicularly intersected product support arms 37L, 37S is provided on the lift table, a hinge shaft 41 for pivotally supporting a cross section of the product support arms is provided on the lift table and a product receiver turning means for turning the product receiver in a longitudinal direction by lifting action of the lift table making the hinge shaft as a center is provided. Subsequently, when the product support arm 37S gets in a horizontal attitude on a front side of the lift table by ascending action of the lift table, a short arm fixing means 45 capable of fixing turning of the product support arm is provided and the carriage for product inversion retaining the product support arm 37L in a horizontal attitude on a rear side of the lift table is constituted when the lift table gets to a descending limit position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a product reversing cart.

  When reversing a rod-shaped or column-shaped material (product) that is heavy and feeding it to the processing machine or carrying it out of the processing machine, use a crane to wire the material (product) and invert it, In some cases, it is performed manually.

In addition, for those using a dedicated reversing device, for example, a transfer chain perpendicular to the transfer direction is provided in the transfer path of the roller conveyor that transfers the material, and the upper chain of this transfer chain is provided loosely and freely. The transfer device can be moved up and down, and the material can be reversed by lifting the material on the tensioning surface of the transfer chain and rotating it in a state of protruding on the transfer surface of the roller conveyor. There is an inverting device (for example, Patent Document 1).
JP-A-6-199412

  The reversing method by wire hooking using a crane requires a crane with high equipment costs and at the same time requires skilled crane operation technology and wire hooking technology. There's a problem. In the case of the reversing device disclosed in Patent Document 1, the reversing direction of the material (product) is a direction orthogonal to the transport direction, and the material (product) has a rectangular or square cross section. If the cross section is circular, it is out of scope.

  The present invention has been made in order to solve the above-described problems, and the problem of the present invention is that the reversal direction of the product (material) coincides with the transport direction, and the cross-sectional shape of the product (material) to be carried in / out It is an object of the present invention to provide an inexpensive product reversing cart that is capable of reversing a heavy product (material) safely without requiring special expertise for operation.

  The product reversing cart according to claim 1 as means for solving the above-mentioned problem is a hand cart provided with a lift table, wherein a product receiver provided with two orthogonal product support arms is provided on the upper surface of the lift table. The product table is provided with a hinge shaft that pivotally supports the intersection of the two product support arms, and the product receiver is rotated in the front-rear direction about the hinge shaft by the lifting and lowering operation of the lift table. Supporting arm fixing means provided with a rotating means and capable of fixing the rotation of the support arm when one of the product support arms is in a horizontal position on the front side of the lift table by the lifting operation of the lift table. And the other arm of the product support arm is held in a horizontal position on the rear side of the lift table when the lift table reaches the lower limit position. It is intended to.

  The product reversing cart according to claim 2 is the product reversing cart according to claim 1, wherein the product receiving rotation means includes a groove cam provided in the product receiving, and a lower limit position of the lift table. And a cam follower provided in the handcart that engages in a cam engagement range between a lift product reversal start position set lower than the lift limit position of the lift table, and the support arm fixing means is the support A locking member provided on the front side of the arm, a hook provided on the lift table so as to constantly press and urge the locking member, and the locking member abuttingly engaging the hook. A dog member for releasing the engagement of the product, and when the groove cam and the cam follower are engaged with each other in the cam engagement range, the lift table is moved up and down to lift the product receiver It is an gist be rotated in the front-rear direction about the shaft.

  The product reversing cart according to claim 3 is the product reversing cart according to claim 2, wherein the lift table is provided so as to be movable and positionable to a position outside the cam engagement range above the upper product reversing start position. The gist of the invention is that the height level of the product receiver can be freely changed in a state where one support arm of the product receiver is held in a horizontal posture at a position outside the cam engagement range.

  The product reversing cart according to claim 4 is the product reversing cart according to any one of claims 1, 2, and 3, wherein the other arm of the two orthogonal product support arms is set to the one support arm. The gist of the invention is that it can be rotated and fixed at a position of 90 degrees or 180 degrees.

  According to the present invention, the reversal direction of the product (material) coincides with the transport direction, and the product (material) can be reversed without being limited by the cross-sectional shape of the product (material) to be loaded and unloaded. In addition, since no large transport means such as cranes are used, even unstable products such as round bars can be easily and safely reversed and carried out or carried in without requiring special expertise for operation. be able to. Moreover, the height of the conveyance surface carried out or carried in can be changed easily.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a front view of a product reversing cart according to the present invention, FIG. 2 is a right side view, and FIG. 3 is a left side view.

Referring to FIGS. 1 to 3, a base 3 made of a rectangular frame is provided at the lower part of the hand cart 1. A pair of fixed wheels 5 are attached to the lower surfaces on both the left and right sides of the front side (right side in FIG. 1) of the base 3, and free wheels 7 with stoppers are attached to the lower surfaces on both sides of the rear side. A gate-shaped hand handle 9 is integrally attached to the rear side of the base 3.
Further, the base 3 of the hand cart 1 described above is provided with a rectangular lift table 15 having a pair of hydraulically driven X-type link mechanisms 13 (a, b) that can be raised and lowered. The X-type link mechanism 13 is provided near the front side of the hand cart 1 and has a first link member 17 (a, b) having a lower end pivotally supported by the base 3 and an upper end portion of the lift. A second link member 19 (a, b) pivotally supported on the table 15 is arranged so as to intersect in an X shape.

  The first link member 17 (a, b) and the second link member 19 (a, b) are rotatably connected by a pin 21 at the intersection. A wheel (not shown) is provided at the upper end of the first link member 17 (a, b), and the wheel is engaged with the lower surface of the lift table 15 so as to be able to travel in the front-rear direction. Support. Similarly, a wheel (not shown) is provided at the lower end of the second link member 19 (a, b), and the wheel is engaged with the upper portion of the base 3 so as to be able to run in the front-rear direction. The table 15 is supported.

  The first link members 17a and 17b in the above-described X-shaped link mechanism 13 (a, b) are integrally connected by a beam member 23 extending in the horizontal direction. Further, a beam member 25 that is integrally fixed to the base 3 is provided on the lower surface of the base 3. The beam member 23 and the beam member 25 are provided with rotating shaft support portions 27 and 29, respectively. It is.

  A head portion of a clevis-type hydraulic cylinder 31 is swingably connected to the rotary shaft support portion 29, and a tip end portion of a piston rod of the hydraulic cylinder 31 is rotatably connected to the rotary shaft support portion 27. It is.

  A hydraulic pump 35 driven by a foot pedal 33 is provided at the lower part of the base 3, and the hydraulic pump 35 and the hydraulic cylinder 31 are connected by a pipe line (not shown).

  The lift table 15 having the above-described configuration can be raised and positioned to an appropriate height by driving the hydraulic pump 35 by stepping on the foot pedal 33. When the lift table 15 is lowered, a variable flow rate control valve (not shown) capable of manually controlling the flow rate of oil discharged from the hydraulic pump 35 is operated at an appropriate speed and at an arbitrarily high level. In addition, it can be positioned downward.

  As shown in FIGS. 1 and 3, a product receiver 37 having two L-shaped product support arms orthogonal to each other is provided on the upper surface of the lift table 15. On the long arm 37L and the short arm 37S of the product receiver 37, a plurality of product transport rollers 39 arranged at appropriate intervals are rotatably supported on the side walls of the long arm 37L and the short arm 37S.

  A hinge shaft 41 that extends horizontally in the left-right direction (the direction orthogonal to the paper surface in FIG. 1) is inserted through the intersection of the long arm 37L and the short arm 37S, and the hinge shaft 41 can be rotated. A pair of bearings 43 that support the shaft are provided on both the left and right sides of the lift table 15 at a substantially intermediate position in the front-rear direction (left-right direction in FIG. 1).

  The long arm 37L and the short arm 37S are fixed to the left and right side walls of the long arm 37L and the short arm 37S by a fixing member 44 that can be connected and fixed. However, if the fixing member 44 is removed, the long arm 37L is The hinge shaft 41 can be turned in the range of 90 degrees counterclockwise about the axis. That is, the long arm 37L can be fixed at a position of 90 degrees with respect to the short arm 37S or can be set at a position of 180 degrees with respect to the short arm 37S. Further, the upper end surface of the product transport roller 39 when the long arm 37L is set at a position of 180 degrees is provided to be at the same level as the short arm 37S transport surface PL.

  One end of the above-described fixing member 44 is rotatably supported by the long arm 37L, and the other end is screwed to the short arm 37S by a screw 48 having a handle 46.

  When the lift table 15 is located at a height above the product reversal start position when lowered (position shown in FIG. 5), the short arm 37S is held in a horizontal posture by the short arm fixing means 45 described later. And the right end portion thereof is provided so as to slightly overhang forward of the lift table 15. At this time, the long arm 37L naturally stands up vertically with respect to the short arm 37S (see FIG. 1).

  The configuration of the short arm fixing means 45 will be described below.

  A bracket 47 is integrally fixed to the front side of the lift table 15, and a hook 51 is pivotally supported on a pin 49 provided on the bracket 47 so as to be swingable in the front-rear direction.

  The hook 51 is integrally provided with a lever member 53 extending obliquely downward and downward from the pin 49, and a rotatable roller 55 is provided at the tip of the lever member 53.

  On the lower surface of the front side portion of the short arm 37S, a plate-like locking member 57 that is detachably engageable with the hook 51 is integrally provided. Between the bracket 47 and the hook 51, the hook 51 is always pressed and urged counterclockwise around the pin 49, and the engagement between the locking member 57 and the hook 51 is maintained appropriately. A tension spring 59 having an appropriate tension is provided.

  On the other hand, a pair of left and right groove cams 63 having a groove 61 (when the lift table 15 is in the position of FIG. 1) that opens in the lower right 45 ° direction are integrally formed below the left and right side walls of the short arm 37S. Is provided.

  On the front side of the base 3, a wall body 65 having a front wall 64F and left and right side walls 64 (L, R) and having a U-shaped cross section with the rear side and the upper surface open is erected. Inside the side wall 64 (L, R) of the wall surface body 65, a pair of left and right cam followers 67 that can be freely engaged with and detached from the pair of groove cams 63 are provided at appropriate positions directly below the groove cam 63.

  The inner surface of the front wall 64F of the wall surface 65 is provided at a position where the cam follower 67 and the groove cam 63 can be freely engaged and disengaged, and functions as a dog with which the roller 55 abuts.

  In addition, an introduction portion 69 is provided on the upper portion of the front wall 64F. The introduction portion 69 extends obliquely forward and obliquely forward so that the cam follower 67 smoothly enters and engages.

  An example in which a round bar (cut product) cut by a cutting machine such as a horizontal band saw machine or a circular saw machine is carried out using the product reversing carriage having the above configuration will be described.

  First, the height of the lift table 15 is adjusted so that the transport surface PL of the product transport roller 39 of the short arm 37S in the product reversing cart matches the product discharge surface of the cutting machine ( (See FIG. 4). The height adjustment range of the product carry-out surface PL is a range between the ascent end position of the lift table 15 and the lift table 15 reaching the product reversal start position when descending.

  Next, the round bar (cut product) cut by the cutting machine is carried onto the short arm 37S of the product receiver 37, and the product transfer roller 39 whose cut surface of the cut round bar (cut product) is the long arm 37L. (See FIG. 4).

  When the cut surface of the cut round bar (cut product) comes into contact with the product conveying roller 39 of the long arm 37L, the lift table 15 is slowly moved by operating a manually controlled variable flow rate control valve (not shown). Lower. When the pair of left and right groove cams 63 reach a position where they engage with the pair of left and right cam followers 67, that is, when reaching the product reversal start position when descending, the roller 55 provided on the lever member 53 of the hook 51 is moved to the wall surface. 65 is engaged with the front wall 64F of 65 and the lever member 53 is rotated in the clockwise direction so that the engagement between the hook 51 and the locking member 57 is released, and at the same time, the pair of left and right groove cams 63 Engagement with the pair of cam followers 67 is started, and rotation of the product receiver 37 in the counterclockwise direction is started (see FIG. 6).

  Further, when the lift table is lowered and reaches the lower limit position of the lift table 15, it reaches a position where the long arm 37 </ b> L of the product receiver 37 is positioned horizontally on the upper surface of the lift table 15, and the rotation stops. At this time, the engagement between the groove cam 63 and the cam follower 67 is released (see FIG. 7).

  In the state of FIG. 7 described above, the cut round bar (cut product) is rotated exactly 90 degrees counterclockwise, and the long arm 37L of the long arm 37L is placed with the cut surface of the round bar (cut product) facing up. The product is placed in a stable posture on the product transporting roller 39 and moves to a position lowered to a position sufficiently lower than the product delivery surface of the cutting machine.

  In this way, the round bar (cut product) cut by the cutting machine is reversed to a stable posture with the cut surface facing up, and at the same time, the conveyance surface is changed to a sufficiently low position, and then the product reversing cart Can be moved to an appropriate place and passed to the next process, or can be safely lowered to a pallet or the like using an appropriate device.

  If the above steps are reversed, a material such as a round bar can be safely carried or supplied to a cutting machine such as a horizontal band saw or a circular saw.

  Further, at a position above the product reversal start position at the time of lowering, the conveyance surface PL of the product conveyance roller 39 of the short arm 37S can be arbitrarily adjusted to a height that coincides with the product carry-out surface of the cutting machine. Therefore, it can correspond to various conveyance surfaces PL.

  Further, as shown in FIG. 8, the screw 48 of the fixing member 44 connecting the left and right side walls of the long arm 37L and the short arm 37S is loosened to release the connection between the fixing member 44 and the short arm 37S. If 37L is rotated 90 degrees counterclockwise, it can also be used as a normal conveyor for carrying out longer round bars (cut products) and the like.

  In the above-described embodiment, the groove cam 63 and the cam follower 67 are used to rotate the product receiver 37. However, a gear can be used instead of the groove cam 63 and a rack can be used instead of the cam follower 67. .

  In the actual example, the long and short product support arms are the long arm 37L and the short arm 37S, but this is because there are many products with a relatively large diameter (that is, a high height) and a short cutting length in the cutting operation. For convenience, it is possible to use arms of the same length or vice versa.

It is explanatory drawing of the cart for product inversion which concerns on this invention which concerns on this invention (front view). It is an AA arrow line view in FIG. FIG. 3 is a left side view in FIG. 2. Operation | movement explanatory drawing (product carrying-out process) of the cart for product inversion which concerns on this invention. Operation | movement explanatory drawing of the product reversing trolley | bogie which concerns on this invention (Product reversal start position at the time of descent). Operation | movement explanatory drawing of the cart for product inversion which concerns on this invention (state in the middle of inversion process). Operation | movement explanatory drawing (state of the inversion process completion) of the cart for product inversion which concerns on this invention. The figure explaining another embodiment of the trolley | bogie for product inversion which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Handcart 3 Base 5 Fixed wheel 7 Swivel wheel 9 Hand handle 13 X-type link mechanism 15 Lift table 17 1st link member 19 2nd link member 21 Pin 23, 25 Beam member 27, 29 Rotating shaft support part 31 Hydraulic cylinder 33 Foot pedal 35 Hydraulic pump 37 Product receiver 37L Long arm 37S Short arm 39 Product transport roller 41 Hinge shaft 43 Bearing 44 Fixing member 45 Short arm fixing means 46 Handle 47 Bracket 48 Screw 49 Pin 51 Hook 53 Lever member 55 Roller 57 Locking member 59 Tension spring 61 Groove 63 Groove cam 64F Front wall 64 (L, R) Side wall 65 Wall surface body 67 Cam follower 69 Introduction part PL Transport surface W Workpiece

Claims (4)

  In a handcart equipped with a lift table, a product receiver provided with two orthogonal product support arms is provided on the upper surface of the lift table, and a hinge shaft that pivotally supports the intersection of the two product support arms Provided on the table, and provided with product receiving and rotating means for rotating the product receiver in the front-rear direction about the hinge axis by the lifting and lowering operation of the lift table, and one of the product support arms by the lifting operation of the lift table Provided with a support arm fixing means that can fix the rotation of the support arm when the arm is in a horizontal position on the front side of the lift table, and the other of the product support arms when the lift table is at the lower limit position The product reversing cart is characterized in that the arm is held in a horizontal posture on the rear side of the lift table.   2. The product reversing cart according to claim 1, wherein the product receiving rotating means is set lower than a groove cam provided on the product receiving, a lower limit position of the lift table, and an upper limit position of the lift table. A cam follower provided in the handcart that engages in a cam engagement range between the lowered product reversal start position and the support arm fixing means includes a locking member provided on the front side of the support arm, A hook provided on the lift table so as to be constantly pressed and urged so as to be disengageable from the locking member, and a dog member that abuts and engages with the hook to release the engagement with the locking member, In a state where the groove cam and the cam follower are engaged in the cam engagement range, the product receiver is rotated in the front-rear direction around the hinge shaft by raising and lowering the lift table. Product reversing truck, characterized in that.   The product reversing cart according to claim 2, wherein the lift table is movably positioned to a position outside the cam engagement range above the upper product reversal start position, and the product receiver is positioned at the position outside the cam engagement range. A product reversing cart characterized in that the height level of the product receiver is freely changeable with one support arm held in a horizontal position.   4. The product reversing cart according to claim 1, wherein the other arm of the two product support arms orthogonal to each other is rotatable and fixed at a position of 90 degrees or 180 degrees with respect to the one support arm. A product reversing cart characterized by being provided in

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