JP2005154075A - Mold transporting vehicle and mold transporting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold transporting vehicle and a mold transporting method capable of reducing a clearance on both sides of a mold arranged by switching a steering gear of the mold transporting vehicle to a steering regulating mechanism to enable rectilinear running of the steering wheels, wherein the number of the mold to be stored is increased and space can be effectively utilized. <P>SOLUTION: The mold transporting vehicle has an upper frame 2 with a front side lifter 17 and a rear side lifter 18 for lifting the mold, a lower frame 2 opposed to the upper frame and provided at a lower part, steering wheels 8L8R, 9L9R, at front, rear, left and right, arranged at the lower frame 3, the steering gear 48 for steering the steering wheels, and transports the mold arranged in a storage place in a plant with the clearance on both sides, to the indoor side of the plant. The steering gear 48 is switched into the steering regulating mechanism 48a applying no horizontal rotation to the steering wheels or a steering mechanism 48b applying the horizontal rotation to the steering wheels. The steering wheels rectilinearly run in a fore and aft direction in the clearance on both sides of the mold arranged by switching the steering gear to the steering regulating mechanism. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mold transportation vehicle used for manufacturing parts and a method of transporting a mold.

  Conventionally, as shown in FIG. 11 (a), a large number of molds 80 used for the manufacture of press parts such as automobiles are arranged mainly in outdoor storage locations of factories. These molds 80 are stacked on the lower surface with two sleepers 81, and a forklift (a 20-ton large forklift) 82 is used when transporting from a storage location to the factory. A forklift lifts any one of the two tiered molds (one piece) with a fork 82a to carry it indoors, and uses an indoor overhead crane (not shown) to mold it. Is lowered and installed on the machine as appropriate.

  However, when the mold 80 'to be transported is in the back of the storage location and the forklift cannot enter, the crane vehicle 83 is loaded into the storage location, the mold 80' is once lifted, and then stored in the storage location. The truck 84 is transferred to the prepared truck 84, transported to the factory by the truck, and installed in the machine as appropriate as described above.

  Such dies 80 and 80 'have, for example, a large size having a total length (L) of 4000 mm, a total width (W) of 2100 mm, a total height (H) of 1100 mm and a weight of 20,000 kg. Large vehicles are used, and the site of the storage place is required to have a wide area of horizontal (Y) 100 m × vertical (X) 100 m. In addition, the height dimension of the sleeper 81 is 70 mm.

  In addition, there is a marine carrier that is transported in a state where a ship such as a motor boat is lifted from a water surface and lifted on a quay such as a harbor, a lake, or a river as a vehicle that is transported in a state where an article is lifted.

That is, it has a front hanger and a rear hanger that can lift the ship, and the front hanger can be moved in the front-rear direction by the left and right wires, and the rear hanger is fixed so as not to move. Yes. And the marine carrier which equipped with the raising / lowering apparatus which can raise / lower these hanging tools to an up-down direction is known (for example, refer patent document 1).
JP 2003-292286 A (FIGS. 1 to 4)

  However, there are the following problems in order to carry the vehicle by using only the forklift 82 without using the crane vehicle 83 or the truck 84.

  That is, as shown in the plan view of the mold arrangement in FIG. 11 (b), from the storage place 85 in which a large number of molds 80 having an overall length (L) of 4000 mm, an overall width (W) of 2100 mm, and an overall height (H) of 1100 mm are arranged. Left and right mold groups 80a arranged in the lateral direction as a passage width for the forklift 82 (FIG. 11 (a)) to travel left and right and back and forth in a storage place for transportation indoors (not shown) It is necessary to provide a gap Ya in the central part of the metal plate and a gap Xa in the mold group 80a before and after the vertical arrangement.

  For example, on the site of vertical (X) 100 m × horizontal (Y) 100 m of the storage place 85, the molds 80 are adjacent to the forklift in two rows and adjacent to 11 rows, and left and right across the gap Ya. If each mold group 80a is configured and 9 rows are arranged with the gap Xa in the vertical direction, the forklift travels forward and backward in the left and right directions and conveys the molds at any position. can do. However, on the site of the predetermined storage place 85, for example, the gap Xa is 9 places in width 9m, and the gap Ya in the center 1 place is 6m in width. It is much larger than the area to be arranged. Therefore, the number of molds to be stored is 396, and the site (space) of the storage location cannot be used effectively.

  In addition, when a heavy metal mold is transported to a long-distance factory using a forklift, the weight balance between the front and rear may be unstable, so the vehicle must be operated without impairing running stability.

  Next, when the crane truck 83 or the truck 84 is used at the mold storage location, two people are required for lifting work by the crane truck, and one person is required for loading / unloading work from the truck, for a total of three workers. Is done.

  In addition, as shown in FIG. 11 (a), when the mold 80 ′ in the back of the storage place is lifted by a crane car, the mold groups 80b and 80c moved out of the row are returned to their original positions. It may be stored in a distributed state around the crane truck without returning to

  Patent Document 1 does not describe a steering switching mechanism for steered wheels in a marine carrier.

  In view of the above-mentioned conventional problems, the present invention makes it possible to narrow the left and right gaps of the arranged molds by switching the steering device of the mold transporting vehicle to a steering restriction mechanism, and to allow the steering wheel to go straight. An object of the present invention is to provide a mold transporting vehicle and a mold transporting method that can increase the storage quantity and effectively use the space.

The invention according to claim 1 is a pair of left and right upper frames each provided with a front hanger and a rear hanger capable of lifting a mold, and a pair of left and right lower parts facing the upper frame and separated at a lower part. The steering wheel is arranged in the left and right and front and rear in the lower frame, the steering wheel steering device is provided on the lower side of the lower frame, and the gold is arranged in the factory storage place with a gap on the left and right. In a mold transport vehicle that transports the mold to the inside of the factory,
The steering device can be switched between a steering restriction mechanism that does not give a horizontal turn (steering angle) to the steered wheels and a steering mechanism that gives a horizontal turn (steering angle), and switches the steering device to the steering restriction mechanism. Thus, the steered wheel is configured to advance straight in the front-rear direction through the gap.

  In this way, the mold transportation vehicle is steered because the steering angle is not given by switching the steering device to a steering restricting mechanism that does not give horizontal steering to the steered wheels in the vicinity of the mold storage location. The wheels are oriented in the same direction as the front and rear direction of the mold transporting vehicle, and only go straight. After that, the mold enters the mold, sandwiches the mold by the front and rear suspensions, and travels straight forward or backward through the left and right gaps of the arranged molds.

  In other words, by switching the steering device to the steering restriction mechanism, the steered wheels are restricted from turning in the horizontal direction and only go straight, so the steering is not restricted and the steering angle is given and the steered wheels are moved in the horizontal direction. Compared to turning, the left and right gaps of the mold can be narrowed. Therefore, compared with the case where a conventional forklift is used, the gap occupying the passage width is reduced, so that the number of molds to be stored increases and the storage space can be used effectively. Furthermore, since a crane vehicle is not used, centralized management can be performed without dispersion of mold storage locations.

  According to a second aspect of the present invention, the steering restricting mechanism includes a locking piece attached to the left and right center arms that are provided in an intermediate portion of the left and right steering wheels and control steering of the steering wheels. The steering of the steering wheel is restricted by engaging a stopper device with the locking piece at a position where the center arm does not give a horizontal turning (steering angle) to the steering wheel. It is desirable.

  In this way, the rotation of the center arm stops at a position where the steering wheel does not turn in the horizontal direction, and the steering wheel is engaged by engaging the stopper device with the locking piece provided on the center arm. Steering of the horizontal turn of is controlled.

  Therefore, the steering wheel can be regulated properly and quickly with a simple configuration by the engagement of the stopper device.

  According to a third aspect of the present invention, the stopper device is composed of a hydraulic cylinder having a stopper member that fits the locking piece from above at the tip, and an electromagnetic valve that controls expansion and contraction of the hydraulic cylinder. It is desirable that the hydraulic cylinder is installed so as to penetrate the vertical direction of the lower frame.

  In this way, the stopper device is configured such that the rod side of the hydraulic cylinder extends downward by switching the supply of pressure oil from the solenoid valve to the piston side of the hydraulic cylinder, and the stopper member provided at the tip end on the rod side The locking piece can be fitted from above and the movement of the locking piece in the left-right direction can be restricted. Also, by switching the pressure oil supply from the solenoid valve to the rod side, the rod side of the hydraulic cylinder shrinks upward, and the stopper member provided at the rod end is separated from the locking piece, The restriction in the left-right direction of the piece is released. Thus, since the hydraulic cylinder and the electromagnetic valve are provided in the stopper device, the stopper device can be operated accurately in a short time.

  Furthermore, since the hydraulic cylinder is installed so as to penetrate the lower frame in the vertical direction, damage from the outside of the hydraulic cylinder can be prevented.

  According to a fourth aspect of the present invention, the rear suspension is lifted and lowered in the vertical direction along the left and right rear struts erected between the upper frame and the lower frame. It is desirable to provide a steady rest in the direction.

  In this way, the rear suspension is lifted and lowered in the vertical direction along the left and right rear columns, but the swinging provided in the left and right side portions can prevent swinging in the front and rear as well as in the horizontal direction. . Therefore, the rear suspension is kept stable.

  According to the invention of claim 5, the vehicle carrying the mold is regulated to steer the steering wheel, enters the mold storage place in the factory, and lowers the rear suspension attached to the rear part of the vehicle. The forward suspension is inserted into the rear lower space of the mold by moving the vehicle forward, the front suspension mounted on the front of the vehicle is moved forward, and then lowered, The front suspension is inserted by retreating to the front lower space portion of the mold, and the mold is lifted by winding the front suspension and the rear suspension so that the vehicle moves forward or When the vehicle travels straight rearward and changes the travel from the straight travel to the orthogonal path, the steering wheel steering restriction is released, and the mold is transported from the storage location to the factory. .

  In this way, the vehicle carrying the mold enters the mold storage place with a posture in which steering of the steering wheel is restricted, so that the vehicle travels straight forward and backward without meandering in the left-right direction. . However, when the die is lifted by the front suspension and the rear suspension and travels straight forward or rearward to change to an orthogonal passage, the steering restriction of the steering wheel is released. This makes it possible to turn the steering wheel in the left-right direction and travel along the orthogonal path to transport the mold into the factory.

  Therefore, it is possible to efficiently carry out the mold transportation work by only one driver of the vehicle.

According to the first aspect of the present invention, the steering device of the mold transportation vehicle can be switched between a steering restricting mechanism that does not give horizontal turning to the steered wheels and a steering mechanism that gives horizontal turning, and the steering is made by switching to the steering restricting mechanism. Since the left and right gaps of the mold with the wheels arranged are going straight forward and backward,
(1) Compared to using a conventional forklift,
Since the gap occupying the passage width is reduced, the number of molds stored can be increased and the mold storage space can be used effectively.
Furthermore, when a heavy mold is transported by a mold transport vehicle, the front and rear weight balance is stable and the running stability is excellent.
(2) Compared to using a crane truck,
Centralized management is possible without dispersion of mold storage locations.
Furthermore, the number of workers can be reduced from three to one driver.

According to the fifth aspect of the present invention, when the mold is transported from the storage place, the steering of the steering wheel of the vehicle is regulated and the mold is lifted by a lifting tool attached to the front and rear of the vehicle, and goes straight. When traveling and changing the passage, the steering wheel steering restriction was lifted and transported.
(1) With one driver, the mold can be quickly transported from the mold storage location to the factory interior, improving the efficiency of transport work.
(2) A heavy metal mold can be properly supported by the front and rear suspension brackets and transported safely.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic side view of a mold transportation vehicle according to an embodiment of the present invention, showing a right side in a traveling direction, and FIG. 2 is a rear view of a cross section in the direction AA of FIG. The left half of the front hanger 17 is divided on the left side, and the right half of the rear hanger 18 is divided on the right side.

  Here, including the subsequent drawings, the left and right symmetrical members are denoted by L, the right member is denoted by R, and the left or right member not illustrated is denoted by L or R in parentheses. Moreover, the front side of the mold transport vehicle refers to the side on which the winches 13 to 16 are installed, and the rear side refers to the side on which the cab 26 is installed.

  As shown in FIG. 1 and FIG. 2, the mold transport vehicle 1 has a pair of left and right upper frames 2 in the upper part, and a pair of left and right lower frames 3 facing the upper frames and separated in the lower part. Left and right front columns 4L, 4R and rear columns 5L, 5R are erected between the upper frame and the lower frame. The upper frame 2 is composed of a left upper frame 2L and an upper right frame 2R which are separated from each other in the left and right directions, and the lower frame 3 is also composed of a left lower frame 3L and a right lower frame 3R which are separated from each other to the left and right. A front frame 6 is connected to the left and right front ends of the upper frame, and a rear frame 7 is connected to the left and right rear ends.

  The upper frame 2 is provided with a front hanger 17 and a rear hanger 18 for lifting the mold 80, and the front hanger 17 is movable in the front-rear direction as indicated by a one-dot chain line.

  On the other hand, in the lower part of the lower frame 3, the front and rear steering wheels 8L and 9L are arranged on the left side and the left and right front and rear sides, and the front and rear steering wheels 8R and 9R are arranged on the right side. The left and right support members 10L and 11L and the right and left support members 10R and 11R are supported, respectively. These support members are connected to a steering device 12 described later. In the present embodiment, the left and right steering wheels 8L and 8R are drive wheels.

  The right lower frame 3R is provided with four sets of winches (hoists) 13, 14, 15, 16 at the front end, and wires for lifting and lowering the front hanger 17 and the rear hanger 18. The ropes 19, 21, 20, and 22 are wound respectively. In addition, an engine unit 23 that is a power source of the mold transportation vehicle is provided on the upper center side, an oil tank 24 and a fuel tank 25 are provided on the lower side of the center part, and a cab 26 is provided on the rear end part. ing. The driver's cab includes a steering wheel 26a for steering, an operation lever 26b for the front suspension 17 and the rear suspension 18, and the like.

  Next, the outlines of the front hanger 17 and the rear hanger 18 will be described with reference to FIGS. Here, FIG. 3A is a view taken in the direction of arrow BB in FIG. 1, FIG. 3B is a view taken in the direction of arrow DD in FIG. 3A, and FIG. -C direction arrow view, FIG. 4 (b) is an EE direction arrow view of FIG. 4 (a), and FIG. 4 (c) is a cross-sectional view of the FF direction arrow of FIG. 4 (a). Show.

  As shown in FIG. 3, the front hanger 17 includes a belt-like member 27 that supports a mold 80 (FIG. 2) at the center, and right and left ends that are connected to both ends (28L) 28R of the belt-like member. The movable pulley member (29L) 29R and the left and right static pulley members (30L) 30R interlocked with the rotation of the movable pulley member by the wire rope (19) 20 are configured. The belt-like member 27 is made of a steel plate having a required width and thickness for lifting the mold 80, and both end portions are fixed to the movable pulley member. Here, since the dynamic pulley member (29L) 29R and the static pulley member (30L) 30R are symmetrical, only the dynamic pulley member 29R for the right side and the static pulley member 30R for the right side will be described, and the description for the left side will be omitted. To do.

  The movable pulley member 29R includes two movable pulleys 31 and left and right support members 32L and 32R that sandwich the dynamic pulleys, and the movable pulleys are rotatably supported by these support members. The static pulley member 30R includes three static pulleys 33, a support member 34R that rotatably supports the static pulleys and formed in an inverted U shape, two sets of support roller members 35R, and a guide roller member 36R. It is composed. The two sets of support roller members 35R are provided inside the center of the support member 34R, and the guide roller member 36R is provided on the right inner surface of the support member 34R so as to face the central pulley 33. The two sets of support roller members 35R support the support member 34R and are movable while rolling a predetermined range in the front-rear direction on the upper surface of the upper right frame 2R. The guide roller member 36R is also movable in the front-rear direction while rolling along the lower surface of the guide plate 37 projecting from a predetermined location on the outer surface of the upper right frame 2R.

  The movable pulley member (29L) 29R is supported by the static pulley member (30L) 30R through the wire ropes 19 and 20 so that the movable pulley member (29L) 29R can be lifted and lowered. As shown in FIG. 1, the static pulley member (30L) 30R and the winches 13 and 15 Guide wheels 38L and 38R are arranged between the wire ropes 19 and 20 therebetween. The wire ropes 19 and 20 are wound around the winches 13 and 15.

  A support plate 41 having guide holes 40 drilled on the left and right wire ropes 39 is fixed to the upper part of the support member 34R of the front hanger 17 so that the left and right wire ropes 39 are pulleys (not shown). The support member 34R can be moved in the front-rear direction by expansion and contraction of the sheave) and the hydraulic cylinder.

  As shown in FIG. 4, the rear hanger 18 also has a belt-like member 40 that is supported by sandwiching the mold 80 (FIG. 2) in the center, and left and right sides that are connected to both ends (41L) 41R of the belt-like member. The movable pulley member (29L) 29R and the left and right static pulley members (42L) 42R interlocked with the rotation of the movable pulley member by the wire rope (21) 22 and the like. The belt-like member 40 has the same shape as that of the belt-like member 27 of the front hanger 17, but a steady member (44L) 44R described later is fixed to the left and right. Further, the movable pulley member is the same as the front hanger 17. The static pulley member (42L) 42R includes three static pulleys 33 that are the same as the front suspension and a support member (43L) 43R that is formed in an inverted L shape that rotatably supports the static pulleys. doing. As shown in FIG. 4C, the center in the front-rear direction of the rear suspension 18 and the center in the front-rear direction of the left and right rear columns 5L, 5R are positioned on the same line (U-U line). As shown, the support members (43L) 43R are fixed to the upper surfaces of the upper left frame (2L) and the upper right frame 2R, respectively. Therefore, the rear suspension tool 18 does not move in the front-rear direction.

  The movable pulley member (29L) 29R of the rear suspension is supported by the static pulley member (42L) 42R through the wire rope (21) 22 so that it can be moved up and down. As shown in FIG. , 16 are provided with guide wheels 45L and 45R via wire ropes 21 and 22, respectively. The wire ropes 21 and 22 are wound around the winches 14 and 16.

  Next, as shown in FIGS. 4 (a) and 4 (c), as shown in FIG. 4 (a) and FIG. 4 (c), as shown in FIGS. doing.

  Here, since the steady rest member (44L) 44R is bilaterally symmetrical, only the right side will be described, and the left side description will be omitted.

  The anti-sway member 44R is fixed to the front and rear anti-skid member 46 formed so as to sandwich the front and rear surfaces of the rear column 5R, and to the back of the front and rear anti-skid member so as to be close to the inner surface of the rear column 5R. The left and right steady rest material 47 is used. The back-and-forth backrest material 46 has a web 46a and a flange 46b extending outward from both ends thereof in a groove shape. Then, the web 46a is moved to a position where the lower end surface 46c of the flange 46b does not interfere with the upper surface of the lower right frame 3R in a state where the rear suspension is lowered and the bottom surface 40a of the band member 40 is close to the ground. It adheres to the outer side surface 40b. The steadying member 44R is movable in the vertical direction between the inner surface of each flange 46b and the front and rear surfaces of the rear column 5R, and between the outer surface of the left and right steadying member 47 and the inner surface of the rear column 5R. Each gap U1 is provided as appropriate.

  Next, the steering device 48 disposed below the lower frame 2 will be described with reference to FIGS.

  FIG. 5A is a schematic plan view showing the steering device in the GG direction arrow view of FIG. 1 and shows a state in which the steering wheel is switched to a steering restriction mechanism that does not give the steering wheel a horizontal turn. FIG. 5B shows a state in which the state shown in FIG. 5A has been switched to the steering mechanism for horizontally turning the steering wheel. 6A is a cross-sectional view taken along the arrow HH in FIG. 5A, FIG. 7A is a cross-sectional view taken along the arrow JJ in FIG. 5A, and FIG. FIG. 8A is a sectional view taken along the line LL in FIG. 7B and includes an explanatory diagram of the electromagnetic valve. 8B is a cross-sectional view taken along the line MM in FIG. 8A, FIG. 8C is a cross-sectional view taken along the line NN in FIG. 8A, and FIG. FIG. 8B is a detailed view of the Q portion, and FIG. 8E is a view taken in the direction of arrows PP in FIG. 8A.

  As shown in FIGS. 5 (a) and 5 (b), the steering device 48 is a four-wheel steering system in which the front and rear wheels are steered in opposite directions, and the left and right steered wheels 8L and 9L and the right and left front and rear wheels are steered. The steering wheel 8R, 9R can be switched between a steering restriction mechanism 48a that does not give horizontal turning (does not give a steering angle to front and rear wheels) and a steering mechanism 48b that gives horizontal turning (giving a steering angle to front and rear wheels). Yes.

  Here, since the steering restricting mechanism 48a and the steering mechanism 48b are bilaterally symmetric and independent mechanisms, the right side mechanism will be described and the left side description will be omitted to simplify the description. The steering restricting mechanism 48a includes support members 10R and 11R provided on the lower side of the lower right frame 3R (FIG. 1), front and rear steering wheels 8R and 9R supported by these support members, and A center arm 49R that is provided in the middle of the front and rear steering wheels 8R and 9R to control the front and rear steering wheels, and the front link rod 50R that connects the center arm and the front and rear steering wheels 8R and 9R to the rear The side link rod 51R, the locking piece 52R fixed to the center arm 49R, the stopper device 53R engaged with the locking piece, and the steering wheel 8R, 9R connected to the center arm to the front and rear steering wheels 8R, 9R This is composed of a steering cylinder 54R for controlling the motor. Hereinafter, each component will be described.

  The front and rear support members 10R and 11R support the front and rear steering wheels 8R and 9R so as to be able to turn horizontally. Since the front and rear support members 10R and 11R have the same configuration, the rear support member 11R will be described, and the description of the front support member 10R will be omitted.

  As shown in FIG. 6, the rear support member 11R includes a bush 55 welded to the lower surface of the lower right frame 3R, a thrust bearing 56 built in the bush, and a fork pin 57 that turns horizontally via the thrust bearing. And a fork arm 58 for supporting the rear right steering wheel 9R, and the like. The fork pin 57 and the fork arm 58 are fastened together by a fork 59 and a bolt 60. The fork 59 supports the rear right steering wheel 9 </ b> R via a wheel hub, a brake device, etc. (not shown) and the spindle 60.

  The front right steering wheel 8R, which is a drive wheel, is provided with a drive hydraulic motor (not shown).

  As shown in FIGS. 5A and 7, the center arm 49R supports a pin 61 that is welded to the lower surface of the lower right frame 3R, an arm 62 that rotates around the pin in the horizontal direction, and the arm. A washer 63 and a nut 64 are used. The pin 61 forms a small-diameter portion 61a around which the arm 62 rotates, and a screw portion 61b that engages with the nut 64 at the tip of the small-diameter portion. The arm 62 forms a boss 62a to be inserted into the small-diameter portion 61a of the pin and an arm main body 62b welded to the boss. The arm main body is connected to the rear end portion of the front link rod 50R at the right end portion thereof. A connecting hole 62c for connecting to the front end of the rear link rod 51R is formed in the connecting hole 62c for connecting to the left end. Next, the locking piece 52R is welded to the arm main body 62b of the center arm 49R. As shown in FIGS. 5 (a) and 7 (b), the position is such that the front and rear steering wheels 8R and 9R do not turn horizontally, that is, do not give a steering angle (on the line L1-L1). In this embodiment, the arm main body 62b is at a position on the L2-L2 line orthogonal to the L1-L1 line, and the locking piece 52R is in the straight traveling direction of the front and rear steering wheels 8R, 9R. Located on the same L1-L1 line. In addition, as shown in FIG.8 (d), chamfering R1 is given to the upper surface both ends of the locking piece, and the stopper member 65 mentioned later is made easy to fit.

  As shown in FIGS. 7B and 8, the stopper device 53R that engages with such a locking piece operates a stopper member 65 that engages the locking piece 52R from above and the stopper member in the vertical direction. A hydraulic cylinder 66 and an electromagnetic valve 67 for controlling the expansion and contraction operation of the hydraulic cylinder are included.

  As shown in FIGS. 8 (b) and 8 (d), the stopper member 65 is formed in an inverted U shape into which the locking piece 52R can be fitted from above, and a nut 66b is attached to the tip of the rod 66a of the hydraulic cylinder. It is concluded through. The stopper inner surface 65a of the stopper member and the end face of the locking piece 52R are provided with play (gap) R2 as appropriate so that the front and rear steering wheels 8R, 9R (FIG. 5A) do not meander left and right. .

  As shown in FIGS. 8A, 8B, and 8C, the hydraulic cylinder 66 is disposed on a vertical line (M1-M1 line) where the stopper member 65 engages with the locking piece 52R. The right lower frame 3R is installed so as to penetrate the vertical direction, and a cylindrical reinforcing member 68 is welded to the upper and lower surfaces of the right lower frame 3R in the penetrating portion. A central support member 66c projects from the upper end portion of the hydraulic cylinder 66, and end support members 69 project from both sides away from the central support material and project near the reinforcing member 68 on the upper surface of the right lower frame 3R. These support members pass through the bolt member 70 in parallel with the upper surface of the lower right frame and fasten the end with a nut 70a to support the upper end of the hydraulic cylinder.

  On the other hand, as shown in FIGS. 8B and 8E, the lower end portion of the hydraulic cylinder 66 is fixed to the lower end portion of the hydraulic cylinder with a bottom plate 66d formed in a substantially square shape and is flush with the bottom plate. The enclosure plate 71 having a square hole so as to surround the outer periphery of the bottom plate is welded to the lower surface of the right lower frame 3R, and a slight gap is formed between the outer periphery of the bottom plate 66d and the square hole of the enclosure plate 71. P1 is provided. The combination of the square plate-shaped bottom plate and the square hole-shaped enclosure plate prevents the hydraulic cylinder from rotating horizontally inadvertently. The solenoid valve 67 for controlling the expansion and contraction operation of the rod 66a of the hydraulic cylinder 66 is a four-port three-position switching valve and is disposed at an appropriate position in the lower right frame. The piston side chamber of the hydraulic cylinder, the circuit 67a, the rod side chamber And a circuit 67b. Moreover, it connects with the switch 72 for solenoid valves provided in the cab 26 (FIG. 1) by the electrical wiring 72a.

  A hydraulic cylinder 66 (not shown) is also provided on the left side of the steering restricting mechanism 48a symmetrically with the right side, and the electromagnetic valve is shared with the above-described electromagnetic valve 67, and the piston side chamber of the hydraulic cylinder and the circuit 67a ′. The rod side chamber is connected via a circuit 67b ′. These circuits are branched from the circuits 67a and 67b described above.

  Next, the steering cylinder 54R for controlling the steering angle to the front and rear steering wheels 8R, 9R shown in FIG. 5A is disposed at an appropriate position of the lower right frame 3R and connected to the arm main body 62b of the center arm 49R. doing. The pressure oil to the steering cylinder is supplied via a rotary hydraulic valve (not shown) installed at a lower portion of a steering wheel 26a provided in the cab 26 (FIG. 1). That is, pressure oil corresponding to the amount of operation (turning) to the left and right of the steering wheel is supplied to the steering cylinder 54R.

  Next, the operation of the steering restriction mechanism 48a configured as described above will be described with reference to FIGS.

  When the driver switches the steering device 48 to the steering restricting mechanism 48a in the cab 26 (FIG. 1) of the mold transport vehicle 1, the left and right steering wheels 8L, 9L and 8R, 9R move in the straight direction (L1-L1). Confirm that it is on the line. It visually confirms the neutral position of the steering wheel 26a (the position that does not rotate in either the left or right direction) and switches the solenoid valve switch 72 (FIG. 8A) to the forward tilt position a. As a result, the A block of the electromagnetic valve 67 moves to the B block, pressure oil from the hydraulic pump 67c is supplied to the piston chamber side of the hydraulic cylinder 66 via the circuit 67a, and the rod 66a of the hydraulic cylinder extends. At the same time, the stopper member 65 provided at the tip of the rod fits into the engagement piece 52R.

  Accordingly, the movement of the engagement piece in the horizontal direction is restricted, and the center arm 49R, the front link rod 50R and the rear link rod 51R connected to the center arm 49R, the front and rear support members 10R, 11R, etc. The movement of the component members in the horizontal direction is restricted, and the steering wheel 26a (FIG. 1) cannot be operated (turned). Accordingly, since the horizontal turning to the front and rear steering wheels 8R and 9R is not given, the steering wheels are directed in the same direction as the front-rear direction of the mold transport vehicle 1, and the traveling posture of the straight traveling direction only. Become.

  Next, the operation when the steering restriction mechanism 48a described above is released and switched to the steering mechanism 48b will be described with reference to FIGS.

  By switching the solenoid valve switch 72 to the backward tilt position b, the C block of the solenoid valve 67 moves to the B block, and the pressure oil from the hydraulic pump 67c is supplied to the rod side chamber of the hydraulic cylinder 66 through the circuit 67b. Then, the rod 66a of the hydraulic cylinder moves upward (R direction) and contracts as shown in FIG. 8 (d). At the same time, the stopper member 65 provided at the tip of the rod is released from the engagement piece 52R.

  Accordingly, the restriction of the movement of the engaging piece in the horizontal direction is released, the center arm 49R, the front link rod 50R and the rear link rod 51R connected to the center arm 49R, the front and rear support members 10R and 11R, and the like. The restriction of the horizontal movement of each component member is released, and the steering wheel 26a (FIG. 1) can be operated (turned). However, horizontal turning is given to the front and rear steering wheels 8R, 9R, and the traveling direction of the mold transporting vehicle 1 can be changed by appropriately giving the steering angle α. For example, by rotating the steering wheel to the left, as shown by the solid line in FIG. 5B, the right steering cylinder 54R expands, the left steering cylinder 54L contracts, and the front and rear wheels move in opposite directions. Will be steered to. In the present embodiment, the maximum steering angle α is, for example, 45 degrees.

  Next, an arrangement and a transport method in the case where the above-described steering device of the mold transport vehicle 1 is switched to the steering restriction mechanism 48a and the mold is stored in a factory storage location will be described with reference to FIGS.

  Fig. 9 (a) is a diagram showing how to arrange the molds at the mold storage location in the factory, and Fig. 9 (b) is a view taken in the direction of the arrow S-S in Fig. 9 (a). FIG. 10 is a schematic diagram showing a method of transporting the mold, and the mold is shown by a solid line in FIG. 10 (a). In FIG. 10 (f), each is indicated by a one-dot chain line.

  As shown in FIG. 9A, the mold 80 is disposed in the storage place 85 in the longitudinal direction (the entire length is the longitudinal direction), the gap Y1 is provided in the lateral direction on the left and right, and the gap X3 is disposed in the longitudinal direction. Can be arranged. The gap Y1 is provided in a continuous and straight line in the column, and the width (passage width) is such that the steered wheels on the left and right and front and rear of the mold transport vehicle can go straight with restricted horizontal turning to the left and right. Can be set as appropriate so that the worker can pass through.

  In the present embodiment, for example, if the gap Y1 can be secured to 900 mm, the mold transport vehicle can travel straight. The breakdown of the gap Y1 is determined as follows.

  That is, as shown in FIG. 9 (b), the gap Y1 on the left steering wheel 8L (9L) side is located outside the left side from the inner side surface and the outer side surface of the steering wheel 8L (9L). The distance a to the outer surface of the support member 10L (11L) protruding to the outside, the distance b to the inner side surface of the steering wheel 8L (9L) and the left end surface 80d of the mold, and the outside of the support member 10L (11L) This is a summary of the side face and the distance c between the mold right end face 80e. When the tire size of the steered wheel is 12.00-24-18PR, the distance a is set to 550 mm, the tire width and the protruding amount of the support member on the left side, and the distance b and the distance c are set by the driver The left and right sides of the steering wheel protrude from the steering wheel in consideration of the slight left / right deflection of the steering wheel due to the play of the steering wheel 26a (gap R2 between the locking piece 52R and the stopper member 65) when the vehicle travels straight. The interval between the members to be interfered with the left and right end surfaces of the mold is set. That is, the distance b is a member protruding rightward from the inner surface of the steered wheel, for example, 200 mm as the distance at which the end surface of the steering cylinder 54L (FIG. 5) does not interfere with the mold left end surface 80d, and the distance c is the driver. However, 150 mm is set as an interval at which the outer surface of the support member 10L (11L) protruding to the left side as viewed from the cab 26 does not interfere with the right end surface 80e of the mold. Note that the gap Y1 on the right steering wheel 8R (9R) side is also the same as the left Y1.

  This gap Y1 is greatly reduced compared to the passage width (3200 mm) when traveling straight using a conventional forklift.

  Further, in the present embodiment, as shown in FIG. 9A, the total length (L) is 4000 mm, the total width (W) is 2100 mm, the total height is (X) 100 m × width (Y) 100 m in the storage place 85. H) 1100 mm molds 80 are stacked in two stages, left and right gaps Y1 are set to 900 mm, 33 rows are arranged in the vertical direction, and a central part X1 gap is set to 8000 mm, and divided vertically and vertically (X1 ) With a gap X3 of 600 mm and 10 rows and 20 rows before and after, and the mold storage quantity reaches 1320 in a two-stage stack.

  Therefore, it is possible to store more than three times the quantity of 396 molds stored when a conventional forklift is used to transport the molds. In order to arrange such a large number of molds with the gaps Y1 and the gaps X3 regularly arranged, the mold carrier vehicle driver can visually check from the driver's cab in the vertical and horizontal directions in advance on the ground of the storage location. Apply line drawing or marking.

  Note that the gap X2 is a width (passage width) that is necessary for the mold transport vehicle 1 to exit the vertical gap Y1 and switch the steering device to the steering mechanism 48b to travel in a perpendicular path.

  Next, when the mold transporting vehicle 1 travels through the gap Y1 inside the storage place 85, the molds 80 arranged in this way are stacked in two stages as shown in FIG. 9B. In this case, the mold 80 is lifted upward by the front hanger 17 and the rear hanger 18 to a height exceeding the height of those molds. After that, the left and right front and rear steering wheels 8L (9L) and 8R (9R) are moved forward or backward without being meandering in the left-right direction with the horizontal turning restricted in the left and right gaps Y1 of the arranged molds. Go straight. H represents the total height of the mold, and Z represents the height of sleepers provided on the lower surface of the mold.

  Next, the conveyance method of the metal mold | die 80 is demonstrated based on FIGS. 10-1 and 10-2. In addition, (a) shows the back part lower space part 81a and the front part lower space part 81b of a metal mold | die.

  The mold transporting vehicle 1 is controlled to steer the steering wheel, enters the factory mold storage place, changes its direction in the vertical direction at X2 in FIG. 9 (a), and the direction A shown in FIG. As shown in FIG. 5B, the front and rear central portions of the rear suspension 18 are stopped at the front and rear intermediate portion of the gap X3 between the front and rear molds 80-1 and 80-2. Further, the rear lifting tool 18 is lowered to the lower part by operating the operating lever 26b (FIG. 1) provided in the cab 26, and the mold transport vehicle 1 is advanced in the B direction. Thereby, as shown in (c), the lower end part of the rear suspension tool 18 is inserted into the rear part lower space part 81a of the mold part at the rear part of the sleeper 81 of the mold 80-1. Subsequently, by operating the operating lever 26b, as shown in (d), the front suspension 17 is moved forward in the C direction from the position of the one-dot chain line, and then the front suspension 17 is lowered in the D direction. Further, in order to insert the lower end of the front suspension 17 into the front lower space 81b of the mold 80-1 at the front of the sleeper 81, the front suspension 17 is shown in FIG. After the rearward movement in the E direction, the lower ends of the front hanger 17 and the rear hanger 18 are lifted upward in the F direction so as to hold the lower surface of the mold 80-1. Furthermore, as shown in (f), it is lifted to a height exceeding the height of the molds stacked in two stages, and the mold transportation vehicle 1 travels straight forward or backward.

  When the travel is changed from the straight travel to the orthogonal passage, the steering restriction of the steering wheel is released, and the mold 80-1 is transported from the storage location to the factory.

In addition to the above, the mold transport vehicle according to the present invention may be implemented as follows.
(1) Although four sets of winches 13 to 16 are installed at the front end of the lower right frame 3R, the winches 13 to 16 are not limited to the front end and may be installed at appropriate positions on the left and right lower frames.
(2) When switching the steering device 48 to the steering restricting mechanism 48a, the driver decides to visually confirm the neutral position of the steering wheel 26a, but receives an electrical signal from the steering wheel or steering wheel. The neutral position of the steering wheel may be confirmed by
(3) Although the stopper member 65 is fitted into the engagement piece 52R by the steering restriction mechanism 48a, the stopper member is omitted and the tip of the engagement piece is drilled, and the rod tip of the hydraulic cylinder is inserted into the hole. You may do it.

The schematic side view of the metallic mold conveyance vehicle which concerns on implementation of this invention is shown. In the rear view of the AA direction cross section of FIG. 1, the left half of the front hanger 17 is divided on the left side, and the right half of the rear hanger 18 is divided on the right side. 3A is a view taken in the direction of arrows BB in FIG. 1, and FIG. 3B is a view taken in the direction of arrows DD in FIG. 3A. 4A is a view in the direction of arrows CC in FIG. 1, FIG. 4B is a view in the direction of arrows EE in FIG. 4A, and FIG. 4C is an F view in FIG. -F direction sectional view is shown respectively. FIG. 5 (a) is a schematic plan view showing the steering device in the GG direction arrow view of FIG. 1, showing a state switched to the steering restriction mechanism, and FIG. 5 (b) is a steering device from FIG. 5 (a). Shows a state in which is switched to the steering mechanism. FIG. 6 shows a cross-sectional view taken in the direction of arrows HH in FIG. 7A is a cross-sectional view taken along the line JJ in FIG. 5A, and FIG. 7B is a view taken along the line KK in FIG. 7A. Fig.8 (a) is sectional drawing of the LL direction arrow of FIG.7 (b), and contains explanatory drawing of a solenoid valve. 8B is a cross-sectional view taken along the line MM in FIG. 8A, FIG. 8C is a cross-sectional view taken along the line NN in FIG. 8A, and FIG. FIG. 8B is a detailed view of the Q portion, and FIG. 8E is a view taken in the direction of arrows PP in FIG. 8A. FIG. 9 (a) is a diagram showing how to arrange the molds at the mold storage location in the factory, and FIG. 9 (b) is a schematic view taken along the line S-S in FIG. 9 (a). (A) is a state diagram in which the mold transportation vehicle moves forward to the mold storage location, (b) is a state diagram in which the center part of the rear suspension is located in the middle part of the gap between the front and rear molds, and (c). These respectively show the state figure which advances to the position where a back suspender is inserted in the back part lower space part of a front metal mold | die. (D) is a state diagram in which the front lifting tool is moved forward, (e) is a state diagram in which the front mold is started to be lifted by the front and rear lifting tools, and (f) is a front mold by the front and rear lifting tools. Each state diagram is shown. FIG. 11A is a schematic diagram for explaining a conventional mold arrangement and transportation method, and FIG. 11B is a plan view of the mold arrangement when the mold is transported using only a conventional forklift. Each is shown.

Explanation of symbols

1 Mold carrier 2 Upper frame 3 Lower frame 5L Left rear column 5R Right rear column 8L Front left steering wheel 8R Front right steering wheel 9L Rear left steering wheel 9R Rear right steering wheel 17 Front suspension Tool 18 Rear suspension tool 44L Left side swing 44R Right side steady stop 48 Steering device 48a Steering restriction mechanism 48b Steering mechanism 49L Left center arm 49R Right center arm 52L Left side locking piece 52R Right side locking piece 53L Left side stopper device 53R Right side stopper device 65 Stopper member 66 Hydraulic cylinder 67 Solenoid valve 80 Die 81a Mold lower part lower space part 81b Mold front part lower space part 85 Mold storage place Y1 Left and right gap of mold

Claims (5)

The lower part has a pair of left and right upper frames provided with a front hanger and a rear hanger capable of lifting a mold, and a pair of left and right lower frames facing the upper frame and separated from the lower part. Steering wheels are arranged on the left and right and front and rear in a frame, the steering wheel steering device is provided on the lower side of the lower frame, and the molds arranged with a gap on the left and right in a factory storage place are arranged inside the factory. In the mold transportation vehicle that transports up to
The steering device can be switched between a steering restriction mechanism that does not give a horizontal turn to the steered wheel and a steering mechanism that gives a horizontal turn, and by switching the steering device to the steering restriction mechanism, A mold transportation vehicle configured to travel straight in the front-rear direction of the gap.   The steering restricting mechanism is provided at an intermediate portion of the left and right front and rear steering wheels to attach a locking piece to a left and right center arm that controls steering of the steering wheel, and the center arm is connected to the steering wheel. 2. The mold according to claim 1, wherein steering of the steered wheel is restricted by engaging a stopper device with the locking piece at a position where horizontal turning is not applied to the mold. Transportation vehicle.   The stopper device is composed of a hydraulic cylinder having a stopper member for fitting the locking piece from above at a tip portion thereof, an electromagnetic valve for controlling expansion and contraction of the hydraulic cylinder, and the like. The mold transport vehicle according to claim 2, wherein the mold transport vehicle is installed so as to penetrate in a vertical direction.   The rear suspension is lifted up and down along the left and right rear struts erected between the upper frame and the lower frame, and is provided with a back-and-forth back-and-forth and a lateral stabilization. The mold transport vehicle according to claim 1, wherein:   The vehicle carrying the mold is controlled to steer the steering wheel, enters the mold storage place in the factory, lowers the rear suspension attached to the rear part of the vehicle, and advances the vehicle The rear suspension is inserted into the rear lower space portion of the mold by the above, the front suspension mounted on the front portion of the vehicle is moved forward, and then lowered, and the front lower space of the mold The front suspension is inserted by retreating to the part, the mold is lifted by winding up the front suspension and the rear suspension, and the vehicle travels straight forward or backward, In the case of changing the travel from straight traveling to an orthogonal passage, the steering restriction of the steering wheel is released, and the mold is transported from the storage location to the factory interior.

Images