JPS6146209B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold carrier developed for transporting heavy items such as molds within a molding factory or the like.

The main object of the present invention is to obtain a transport vehicle that allows easy loading and unloading of objects such as molds.

Molds used in presses, molding machines, etc. are generally heavy and difficult to handle. For this reason, it took a considerable amount of time and effort to replace the mold.
Therefore, in order to make it easier to move the mold, mold carriers such as those described in Japanese Utility Model Application Publication No. 56-23217, Japanese Utility Model Application Publication No. 55-103023, and Japanese Patent Application Publication No. 55-84234 have been used. It has been known. However, these conventional mold carriers have a roller conveyor that can be moved in and out of the upper surface of the vehicle, and the molds are supported so that they can move in a fixed direction, which makes them inconvenient to use. There were flaws. In other words, since molds vary in size and shape, it is necessary to finely adjust the mold in the width direction on a roller conveyor when transporting the mold to the desired setting position of a press machine, etc. In this case, a large amount of force is required to move the heavy mold in the width direction on a roller conveyor, so there is a problem in that changing the mold becomes extremely labor-intensive.

The present invention has been made in view of the above, and includes a chassis frame having wheels that follow the turning direction of a towing handle, and a planar rectangular frame provided on the chassis frame so as to vertically move up and down by hydraulic drive. A plurality of cylindrical roller members, each consisting of an elevating table and rotatably enclosing a sphere at its upper end, are provided at intervals on the upper surface of the elevating table, and molds are moved on the horizontal conveying surface created by the roller members. is supported so as to be movable in a free direction, and a table plate having a number of through holes into which the roller members are loosely fitted is disposed so as to protrude and retract from the horizontal conveying surface formed by the roller members, Furthermore, the mold transport vehicle is characterized in that surrounding plates are provided on the four sides of the lifting table so that they can move in and out independently.

An embodiment of the mold carrier according to the present invention will be described below. First, the suspension will be explained with reference to FIGS. 1 to 4. In the figure, reference numeral 1 denotes a chassis frame having an H-shaped planar structure, on which pivot shafts 2R, 2L, 3R, and 3L are vertically supported at the front left and right positions and the rear left and right positions, respectively. As shown in FIG. 5, the lower end of each of the rotating shafts is fixed with a forked metal fitting 4, and two disc-shaped wheels 6a, 6b are attached to the bearings 7a, respectively, on an axle 5 that is horizontally suspended on the bearing metal fitting. , 7b so as to be rotatable. That is, a pair of wheels 6
a, 6b are the respective rotation axes 2R, 2L, 3R, 3L
are provided at the bottom end of each. Sprockets 7R and 8R are fixedly installed at the end of the front right turning shaft 2R that projects onto the chassis frame 1, and sprockets 7L and 8L are similarly fixed at the end of the front left turning shaft 2L that projects above the chassis 1. has been done. Furthermore, sprockets 9R and 9L are fixed to the projecting ends of the rear left and right pivot shafts 3R and 3L onto the chassis frame 1, respectively. 10R is an endless chain wound across sprockets 8R and 9R, 10L is an endless chain wound across sprockets 8L and 9L, and 11 is an endless chain 10R and 10L. The guide roller 12 also serves as tension adjustment, and 12 is a partition piece provided at the X-shaped intersection. This allows the right pivot axis 2
R and 3R turn in opposite directions, and left turning axes 2L and 3L also turn in opposite directions.

Reference numeral 13 denotes a towing handle, the base end of which is connected via a pin 15 to a handle shaft 14 that is vertically supported on the central vertical line of the chassis frame 1. Reference numeral 16 denotes a gearbox incorporating a gear transmission mechanism, which will be explained in detail later.
Conducted to 7R and 17L. The vertical axis 17R, 1
Sprockets 18R, 18L fixed to 7L and sprockets 7R, 7L of the pivot shafts 2R, 2L
Endless chains 19R and 19L are respectively wound between the handle shafts 14 and
I am trying to communicate this to L. Therefore, the wheels provided on the front pivot axes 2R and 2L are the tow handles 1.
Turn in the same direction as the towing direction of 3, and rotate the rear pivot axis 3.
The wheels provided at R and 3L turn in the opposite direction.

The gear transmission mechanism in the gearbox 16 is shown in Figure 6~
It is shown in FIG. That is, a camshaft 20 is rotatably supported in the gearbox 16 parallel to the vertically supported handle shaft 14, a large-diameter spur gear 21 is fixed to the handle shaft 14, and the camshaft 20 has the large-diameter Small diameter spur gear 2 with a smaller diameter and half the number of teeth than spur gear 21
The handle shaft 14 and the cam shaft 20 are connected by fixing the handle shaft 14 and the cam shaft 20 and meshing the pair of spur gears. An inclined shaft 24 is bendably connected to the lower end of the handle shaft 14 via a universal joint 23, and a bevel gear 26 is fixed to the inclined shaft 24. A cam plate 28 having a cocoon-shaped cam groove 27 formed on the upper surface is fixed to the lower end of the cam shaft 20,
The rotor 29 at the tip of the tilting shaft 24 is connected to the cam groove 27.
It is loosely fitted inside. Reference numerals 30R and 30L denote a pair of horizontal shafts provided on a horizontal axis passing through the bending point P of the universal joint 23, and a pair of driven bevel gears meshing with the bevel gear 26 are provided at the protruding ends of the respective horizontal shafts in the gear box 16. 31R and 31L are fixedly installed. Also 32
is a front-shaped guide frame with both ends attached to the horizontal axis 30.
R, 30L, and is supported by penetrating the tilting shaft 24 at the intermediate portion, so that the tilting shaft 24 can tilt only within a vertical plane centered at the bending point P and orthogonal to the horizontal axes 30R, 30L. We are guiding you. The protruding ends of the horizontal shafts 30R, 30L are the vertical shafts 17R,
Transmission bevel gears 34R, 34L are fixed to mesh with transmission bevel gears 33R, 33L fixed to the horizontal shafts 30R, 30L, and the rotation of the horizontal shafts 30R, 30L is caused by the vertical shafts 17R, 17L.
Transmit to 17L.

For this reason, when the towing handle 13 is directed directly forward, the gear transmission mechanism is positioned so that the cam plate 28 is positioned as shown by the solid line in FIGS. Since the wheels provided on 3R and 3L are in a straight parallel state, the vehicle moves forward by pulling the handle 13. Now, if the towing handle 13 is tilted at 45 degrees for a left turn, the handle shaft 14 rotates 45 degrees, but the cam shaft 20 rotates 90 degrees, so the cam plate 28
is as shown by the dashed line in FIG. That is,
When the tow handle 13 is straight, the trochanter 2
9 was loosely fitted into the long diameter part of the cocoon-shaped cam groove 27, but when the towing handle 13 is tilted by 45 degrees, the trochanter 29 is loosely fitted into the short diameter part of the cam groove 27, so The fixed bevel gear 26 changes its tilting direction as shown by the dashed line in FIG. At the same time, the 45 degree rotation of the handle shaft 14 is transmitted to the bevel gear 26 via the universal joint 23.
Since the rotation is accompanied by 45 degrees of rotation, the driven bevel gears 31R and 3
1L and auxiliary rotation, respectively. At this time, since the bevel gear 26 tilts according to the guidance by the cam groove 27, the rotation angles of the driven gears 31R and 31L differ according to the differential gear theory. That is, the right driven gear 3
1R has a larger rotation angle than the left driven gear 31L. (In other words, the rotational speed of the driven gear 31R is faster than the rotational speed of the driven gear 31L). Therefore, the rotating shaft 2 is transmitted through the endless chain 19R.
The rotation angle of R is 45 degrees or more, whereas the rotation angle of the rotating shaft 2L transmitted through the endless chain 19L is 45 degrees or less. The rotation of the rotating shaft 2R is transmitted to the rear rotating shaft 3R via the cross-shaped endless chain 10R, and the rotation of the rotating shaft 2L is transmitted to the rear rotating shaft 3L via the left-hand cross-shaped endless chain 10L. be done. Therefore, as shown schematically in FIG. 13, the wheels installed on these pivot axes have a turning angle where the extension lines of the wheels intersect at the focal point F, and the carrier is turned to the left around this focal point F. can. At that time, the wheels do not slip at all, so by pulling the tow handle 13, the wheels can be moved lightly and smoothly.

Further, if the towing handle 13 is rotated 90 degrees, each wheel turns 90 degrees and becomes horizontally parallel as shown in FIG. 14, so that the carrier vehicle can be moved right sideways in this state.

In addition, since the pair of wheels 6a and 6b are independently rotatably supported on the axle 5, when rotating the respective turning shafts 2R, 2L, 3R, and 3L. Since they can rotate in opposite directions, they move smoothly without any load being applied to their rotation axes.

Next, a device for maintaining the safety of the vehicle body in a stationary state will be explained. A straight pipe-shaped guide tube 36 is fixed vertically to a bracket 35 protruding from the four corners of the chassis frame 1, and a shaft-shaped grounding leg 37 is inserted into the guide tube 36 so as to be vertically movable. The lower end portion 38 of the ground leg 37 has a large diameter and has an elastic pad made of rubber or the like affixed to its lower surface. A tsuba 39 is provided approximately in the middle of the grounding leg 37.
is formed, and the upper end of a coil spring 40 housed in the guide tube 36 in a compressed state is elastically brought into contact with the collar 39 to urge the grounding leg 37 upward. 4
Reference numerals 1 and 41 refer to a bearing plate whose lower part is fixed to both outer surfaces of the upper part of the guide tube 36 and which is vertically established in the upper part of the guide tube 36; A toggle joint formed by connecting in a letter shape, the upper end of the toggle joint 42 is pivotally connected to the upper end of the bearing plates 41, 41 by a pivot pin 44, and the lower end is connected to the upper end of the grounding leg 37. It is pivotally connected to the section by a pivot pin 45. In this case, the inner bearing plate of the pair of bearing plates 41, 41 has a frame portion 41' extending therefrom, and a cover (not shown) covering the endless chains 10R, 10L is provided on this frame portion 41'.
can be fixed with screws.

In addition, an operating shaft 46 in the vehicle width direction is attached to the chassis frame 1.
is rotatably supported, and both ends of the operating shaft 46 protrude from both sides of the chassis frame 1, and a T is attached to each end of the operating shaft 46.
A lever piece 47 is fixed so as to be perpendicular to the letter shape, and a foot pedal 48 is installed approximately in the middle of the operating shaft 46.
to fix. Then, the proximal ends of each interlocking rod 50 are connected to each other with pivot pins 49 at both ends of both lever pieces 47, and the tips of each interlocking rod 50 are connected to the connecting pins 43 of the toggle joint 42, respectively. wear.

Reference numeral 51 designates stoppers that protrude from both sides of the chassis frame 1 so as to come into contact with the lever pieces 47 in order to regulate the rotation angle of the operating shaft 46. When the foot pedal 48 is depressed and the lever piece 47 is turned in the direction of the arrow, each interlocking rod 50 is pressed and the connecting pin 43 at the tip is pressed.
By pushing , the opening angle of the toggle joint 42 is expanded, so that the grounding leg 37 can be moved downward against the elasticity of the coil spring 40. Then, the lower end of the grounding leg 37 touches the ground as shown by the dashed line in FIG. In this state, the lever piece 47 comes into contact with the stopper 51, and the downward movement of the foot pedal 48 is stopped at the stopping angle. That is, if the connecting pin 43 crosses the vertical axis of the grounding leg 37 even slightly to the opposite side, the grounding leg 37
is held in a downward motion. Therefore, the four grounding legs 37 touch the ground at the same time to maintain stability.
To understand this, each connecting pin 43 is pulled by kicking up the foot pedal 48 with the tip of the toe, so the toggle joint 42 returns to its original dogleg shape and the coil spring 40 of the grounding leg 37 is pulled up. Pull upward with elasticity.

A hydraulic cylinder 52 is vertically installed in the center of the chassis frame 1, and telescopic guide columns 5 are provided on both sides of the hydraulic cylinder 52.
3R and 53L are vertically installed, and a horizontal lifting table 54 is provided above the hydraulic cylinders. 55 operates the hydraulic cylinder 52 to raise and lower the lifting table 5.
4, a foot-operated lifting pedal 56 is used to discharge the hydraulic oil in the hydraulic cylinder 52 and lower the lifting table 54, and 57 is a lowering pedal that is used to lower the lifting table 54. This is a container box stored at the bottom of 1.

The lifting table 54 is formed into a rectangular shape with a channel-shaped frame material arranged around it, and a sphere 5 is placed on the upper surface of the rectangular frame.
A plurality of cylindrical roller members 59 each having a roller member 8 rotatably held at its upper end are provided at intervals. Reference numerals 60 and 60 denote a pair of parallel horizontal shafts supported in the width direction of the lifting table 54, and eccentric wheels 61 are provided at both ends of the horizontal shafts, respectively.
is fixed thereto, and protruding pieces 62, 62 are fixed to approximately the middle portion as shown in FIG. The tips of these protruding pieces are attached to pivot pins 63, 63.
A nut 66 is connected to an interlocking rod 64 by a pivot pin 65 at one end of the interlocking rod 64. A bearing 69 is supported by a pivot pin 68 on a bracket 67 fixed to the front surface of the lifting table 54, and a screw shaft 70 rotatably supported by the bearing 69 is screwed into the nut 66. A rotation handle 71 is provided at the other end of the screw shaft 70.

Reference numeral 72 designates a table board made of plywood, the periphery of which is reinforced by a metal frame 73 with a square cross section.
The table plate 72 is placed in such a way that the total four eccentric wheels 61 mentioned above come into contact with the lower surface of the metal frame 73.
is supported on the eccentric wheel 61.
Therefore, each of the roller members 59 is mounted on the table plate 72.
A large number of through holes 74 are formed into which the holes 74 are loosely fitted. Then, by operating the rotary handle 71 and rotating the screw shaft 70, the protruding pieces 62, 62 are moved to the first position via the interlocking rod 64.
Rotate the horizontal axis 6 as shown by the two-dot chain line in Figure 0.
When each eccentric wheel 61 is rotated by rotating 0 and 60, the table plate 72 supported on the eccentric wheel 61 moves up and down according to the amount of eccentricity, and the upper surface of the table plate 72 touches each roller member 59. sphere 58
It appears from the horizontal conveyance surface created by

Support holes are formed at regular intervals in the channel-shaped frame material on the four sides of the lifting table 54, and a support shaft 75 is vertically supported in the support holes so as to be movable up and down. Each support shaft 75 is brought into contact with the upper end of a coil spring 77 disposed in a compressed state within the channel-shaped portion of the frame material by contacting the formed collar 76.
force upward. The downwardly protruding end of the support shaft 75 is fixed to a band plate 78 provided on each side with bolts 79 to prevent it from coming off. Surrounding plates 80F, 80B, 80R, and 80L are fixed to the upper part of the support shaft 75 by welding so as to surround the front, rear, left, and right sides of the table plate 72, respectively.

Among the surrounding plates on each side, the rear surrounding plate 80B is the first
As shown in FIG. 1, the lever 81 extending forward is moved forward and backward to move it in and out. Further, the right side surrounding plate 80R is configured to be retracted by operating a lever 82R, and the left side surrounding plate 80L is configured to be retracted by operating a lever 82R, the details of which are shown in FIG. 12. That is, regarding the surrounding plate 80B, a shaped frame 83 is fixed to the lower surface of the band plate 78, and a pivot pin 85 is attached to the lower end of a bracket 84 hanging inside the rear of the lifting table 54 to pivot the shaped piece 86. One end of the conical piece 86 is loosely fitted into the frame 83, and the other end is connected to the tip of the lever 81 with a pivot pin 87.

Regarding the surrounding plates 80R and 80L, similarly, a shaped frame 88 is formed on the band plate 78 located directly below the corresponding surrounding plate, and pivot pins 89 are provided on the inside of both sides of the lifting table 54. An engagement pin 91 is implanted at the tip of the plate-shaped engagement piece 90 that is pivotally supported, and the engagement pin 91 is loosely fitted into the shaped frame 88.
Lever 80R, 80 is provided in the middle part of the plate-like engagement piece 90.
The tip of L is pivotally attached using a pivot pin 92.

In order to use the mold carrier constructed in this manner to replace a mold in a press machine or the like installed in a factory, first, step on the ascending pedal 55 or the descending pedal 56. Adjust the height of the lifting table 54 so that the horizontal conveying surface created by the roller members 59 matches the level at which the mold is installed,
The four grounding legs 37 are brought into contact with the ground by stepping on the foot pedal 48. Then, lower the required surrounding plate and make the sphere 5.
The mold is carried onto the lifting table 54 by freely rotating the mold 8. Thereafter, by operating the rotary handle 71 to raise the table plate 72 and sinking the sphere 58 into the through hole 74 of the table plate, the lower surface of the mold is brought into contact with the upper surface of the table plate 72, and the mold is removed. prevent the free movement of Then, the grounding leg 37 is retracted and the towing handle 13 is pulled to move the carrier to a desired location. Then, by rotating the rotary handle 71 in the opposite direction to lower the table plate 72 and slidably supporting the mold on the roller member 59 again, the corresponding surrounding plate can be lowered from either the front, rear, left or right sides of the elevating table. The mold can be easily transported.

As described above with respect to the embodiments, the mold carrier according to the present invention includes a chassis frame having wheels that follow the turning direction of the towing handle, and a vehicle mounted on the chassis frame that vertically moves up and down by hydraulic drive. A cylindrical roller member having a spherical body rotatably encased in its upper end is provided at plural intervals on the upper surface of the elevating table. The mold is supported so as to be freely movable on a horizontal conveyance surface, and a table plate with a large number of through holes into which the roller members loosely fit is provided on the horizontal conveyance surface formed by the roller members. In addition, surrounding plates were provided on each of the four sides of the lifting table so that they could move in and out independently, so that the surrounding plates could prevent the mold from falling off during transportation, and also prevent the mold from sliding down during transportation. By lowering the enclosure plate, the mold can be carried onto or removed from the roller member from either side of the lifting table. Since the mold is supported by a sphere rotatably supported by a roller member, it can be easily moved and rotated in any direction on the horizontal conveyance surface, making it easy to handle the mold. This has the effect of promoting mold replacement work.

[Brief explanation of the drawing]

The drawings show an embodiment of the mold carrier according to the present invention, in which FIG. 1 is an overall front view, FIG. 2 is a left side view, FIG. 3 is a plan view, and FIG. is a sectional view taken along line A-A in Figure 2, and Figure 5 is a cross-sectional view taken along line B-B in Figure 2.
6 is a cross-sectional view of the gearbox showing the configuration of the gear transmission mechanism, and FIG. 7 is an enlarged view of the line C-
8 is a sectional view taken along line C, and FIG. 8 is a sectional view taken along line D-D in FIG. 7.
9 is a partially enlarged sectional view of FIG. 2, FIG. 10 is a sectional view taken along line E-E of FIG. 3, and FIG. 11 is a cross-sectional view of FIG.
FIG. 12 is a sectional view taken along the line G--G in FIG. 3, and FIGS. 13 and 14 are schematic diagrams showing the operating state during turning. 1... Chassis frame, 2R, 2L, 3R, 3L
...Swivel axis, 6a, 6b...Wheel, 7R, 7L,
8R, 8L, 9R, 9L... Sprocket, 10
R, 10L... Endless chain, 13... Traction handle, 14... Handle shaft, 16... Gear box, 17R, 17L... Vertical shaft, 18R, 18L
... Sprocket, 19R, 19L ... Endless chain, 20 ... Camshaft, 21 ... Large diameter spur gear, 22
... Small diameter spur gear, 23 ... Universal joint, 24 ... Inclined shaft, 26 ... Bevel gear, 27 ... Cam groove, 28 ...
...Cam plate, 29... Trochanter, 30R, 30L... Horizontal shaft, 31R, 31L... Driven bevel gear, 33R,
33L, 34R, 34L...conduction bevel gear, 52...
...Hydraulic cylinder, 54... Lifting table, 55...
...Pedal for ascending, 56...Pedal for descending, 58...
... Sphere, 59 ... Roller member, 60 ... Horizontal axis, 61
... Eccentric wheel, 71 ... Rotating handle, 72 ... Table plate, 74 ... Through hole, 80F, 80B, 80
R, 80L... Surrounding plate, 81, 82R, 82L...
lever.

Claims (1)

[Claims] 1 Consists of an undercarriage frame with wheels that follow the turning direction of the towing handle, and a rectangular planar lifting table installed on the undercarriage frame so as to move vertically up and down by hydraulic drive, with a spherical body at the upper end. A plurality of rotatably supported cylindrical roller members are provided at intervals on the upper surface of the lifting table, so that the mold is supported so as to be movable in a free direction on a horizontal conveyance surface created by the roller members. At the same time, a table plate with a large number of through holes into which the roller members loosely fit is arranged so as to protrude and retract from the horizontal conveying surface formed by the roller members, and furthermore, surrounding plates are provided on the four sides of the elevating table. A transport vehicle for molds, characterized in that each of them is provided so that they can appear and appear independently.