JPH0535901Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a hand lift truck device for moving and installing relatively heavy machinery and the like to various work sites within, for example, a factory or warehouse.

"Conventional Technology" Conventionally, the machinery used at the destination as described above has been transported by hoisting using a crane device or using rolling wheels.

``Problems that the invention attempts to solve'' However, with crane equipment, it takes a lot of effort and time to move one time, and it is difficult to perform precise positioning, and with one-way wheels, it is difficult to In order to make the wheels protrude from the bottom or the underside of the installation stand, a means for fixing the position is required, and if the wheels are made to be retractable, there may be problems such as the need for a separate wheel projection mechanism on the machine or installation stand. Ta.

``Means for Solving the Problems'' However, the present invention consists of a truck frame in which the front wheels are disposed on the left and right bifurcated forks, a master cylinder to which the rear wheel at the lower end is attached so as to be freely changeable in direction, and a master cylinder to which the cylinder is driven to drive the truck. A hand lift truck device equipped with a plunger pump that raises and lowers a frame and a pumping handle that operates the pump includes: an equipment installation stand having a fork insertion part into which the left and right fork parts are fitted; and the installation stand and the fork part. a wheel support member having a movable wheel at one end is swingably attached to the end of the installation base on the side opposite to the fork insertion via a pivot pin; A movable wheel is provided below so as to be able to protrude freely, and one end of a slave rod for vertically controlling the wheel position is connected to the support shaft at the other end of the wheel support member, and the other end of the rod is connected to the fork of the installation base. While facing the insertion part, a main rod for controlling the wheel position up and down, which moves back and forth in conjunction with the raising and lowering of the track frame by the cylinder and connects its tip side to the rod, is inserted into the left and right fork parts. It is configured as follows.

``Function'' According to the present invention, by fitting and connecting the left and right fork parts of the truck to the fork insertion part of the installation stand on which machinery is mounted, when the installation stand is lifted by the cylinder of the truck, this lifting The rear wheels of the truck and the movable wheels of the installation base can be used to simultaneously move the truck along with the machinery on the installation base safely and easily by using force to simultaneously project the moving wheels of the installation base downward. in,
In particular, in this case, the length of the fork part of the truck can be made short and small, making the truck small and lightweight, making it easy to handle, and the mounting base is not limited by the truck and can be used for machinery. It is highly adaptable as it can be freely selected according to the size, and there is no need to separately install a drive device for protruding or retracting the wheels, which is extremely simple. This makes it possible to carry out work with excellent operability using only a truck, and transport work that can be appropriately adapted to machines of various sizes and shapes without any hindrance, making it extremely practical.

"Embodiments" Examples of the present invention will be described below in detail based on the drawings. Fig. 1 is an enlarged sectional view of the main parts, Fig. 2 is a side view of the whole, and Fig. 3 is a plan view of the same, in which a device installation stand 3 on which a machine 2 is mounted is connected to the front of a hand lift truck 1. In the figure, reference numeral 4 denotes a truck frame having left and right bifurcated fork portions 5, 5 protruding from the lower front surface; 6, 6 denote the fork portions 5, 5;
7 is a master cylinder to which a pair of left and right rear wheels 9, 9 are attached at the lower end via an axle 8 so as to be able to freely change direction; 10 is a brake device for the rear wheels 9; 11 is a brake device for the rear wheels 9; a ram piston 13 whose upper end fits into the chevron-shaped support portion 12;
14 is a bearing plate rotatably provided on the circumferential side of the cylinder 7 below the base 13; 15 is an oil tank fixed on the circumferential side of the cylinder 7 on the upper surface of the base 13; 16; 17 is a plunger pump that pumps the oil in the tank 15 to the cylinder 7, and 17 is the tank 15.
Handle base bracket fixed to upper back,
18 is a pumping handle whose lower end is supported by the base bracket 17 so as to be swingable back and forth to operate the pump 16; 19 is a loop-shaped grip provided at the upper end of the handle 18; and 20 is a pump handle based on the cap 21 at the upper end of the handle 18. This is a hydraulic switching lever whose end is inserted and connected to the hydraulic operating arm 22 of the base 13.

On the other hand, the installation stand 3 has fork parts 5, 5 on the left and right sides.
The left and right chassis 23, 23 are inserted from the rear end, and the left and right chassis 23, 23 are inserted into the horizontal frame 2.
4, 24, 25, and the front horizontal frames 24, 24 are connected via the vertical frame 26, and a top plate 27 is pasted on the upper surface of the chassis 23, 23 and each frame 24, 24, 26 to form a pallet. The left and right fork bases 2 are attached from both sides of the horizontal frame 24 to the front of the installation stand 3.
8, 28 are provided in a protruding manner, and left and right forks 29, 29, which are attachments, are formed to be detachably attached to the bases 28, 28 via bolts 30.

Further, the fork portions 5, 5 are connected to the left and right chassis 2.
3, 23 is an engaging member that is fitted into partition spaces 32, 32 which are fork insertion parts formed at the rear through a partition wall 31, and connects and connects the fork parts 5, 5 to the installation base 3 in a detachable manner. A set pin 33 is provided, and the set pin 33 is fitted into receivers 34, 34 installed in the top plate 27 above the partition spaces 32, 32, and the lower part of the set pin 33 is inserted as shown in FIG. Pin holes 35, 36 are formed in the upper surfaces of the left and right chassis 23, 23 and the fork parts 5, 5 to pass through the fork parts 5, 5 in the connected state. Furthermore, the partition walls 31, 3
A connecting plate 37 is provided with one end connected to the connecting plate 1 to protrude into the partition spaces 32, 32, and the tip of the connecting plate 37 is bent downward to form a tapered surface 37a, and the tip of the fork portion 5 is connected to the upper surface of the connecting plate 37. By sliding the front wheel 6 into contact with the tapered surface 37a, the truck 1 is stopped and held at a position where the respective pin holes 35 and 36 match (connection position). .

Furthermore, movable wheels 38, 38 of the installation base 3 are installed inside the front ends of the chassis 23, 23, and the intermediate portions of the side plates 39 of the wheels 38, 38 are rotatably supported on the chassis 23 via fixing pins 40, and the chassis 2
A wheel 38 is supported downwardly so as to be protrusive.

Then, the lifting rod 41 that causes the moving wheels 38, 38 to protrude downward is connected to the hand lift truck 1.
The front end of the rod 41a on the track 1 side, which is inserted into the fork parts 5, 5, protrudes from the front surface of the fork parts 5, 5, while the front end of the rod 41a inserted into the fork parts 5, 5 is inserted into the chassis 23, 23. The front end bearing part 42 of the rod 41b on the side of the installation stand 3 to be inserted is connected to the rear side of the side plate 39 via the support shaft 43, and the rear end is passed through the partition wall 31 to face the inside of the partition space 32. When the mounting base 3 is connected, the end faces of each rod 41a, 41b are brought into contact with each other.

Furthermore, as shown in Fig. 5, arms 4 are attached to both ends.
Left and right cylinder shafts 46, 46 that integrally connect 4, 45
is rotatably fitted to a rotation fulcrum shaft 47 horizontally mounted on the truck frame 4, and the inner arm 44,
The tips of the arms 44 are rotatably connected to both sides of the bearing plate 14 via fixing pins 48, while the tips of the outer arms 44 are exposed to the inside of the fork portions 5, 5 through the openings 49 on the upper surfaces of the rear ends. Said rod 41
The movable wheels 38, 38 are rotatably connected to the rear end bearing portion 50 of a via a support shaft 51, and are protruded or retracted via the rods 41a, 41b in conjunction with the vertical movement of the truck frame 4. It consists of

A bearing 5 integrally connects the intermediate portions of the cylindrical shafts 46, 46 to the track frame 4 via a support plate 52.
3, it is rotatably supported. Further, the set pin 33 is provided with a pull-out pin 54 which is a pull-out handle to be inserted into the hole 33a in the upper part, and a large diameter ring and a small diameter ring 55, 56 for holding each pin 33, 54 when not in use are attached to the track frame. It is provided on the back of one side of 4. Further, stoppers 57, 57 are fixed to the lower front surface of the truck frame 4 inside the fork portions 5, 5 to prevent the front surface of the truck frame 4 from coming into contact with the rear surface of the installation base 3.

The present embodiment is constructed as described above, in which the hand lift truck 1 is moved to the rear of the installation base 3, and the oil in the cylinder 7 is returned to the tank 15 by operating the hydraulic pressure switching lever 20 to move the truck frame 4 to the lowest position. to support. After this track 1
is advanced to partition the left and right fork parts 5, 5 into the space 3.
1, and set the set pins 33, 33 into the receiver 3.
4 and 34, the track 1 is connected to the rear of the installation base 3.

In this state, the pump 16 is driven by swinging the pumping handle 18 back and forth, and the oil in the tank 15 is forced into the cylinder 7, thereby causing the ram piston 11 to protrude and the truck frame 4 to rise. As a result, the rear part of the installation base 3 is lifted and supported by the left and right fork parts 5, 5, and the arm 4 is moved in conjunction with the rise of the frame 4.
4 and 45 integrally rotate counterclockwise around the fulcrum shaft 47, and the lifting rods 41a and 41b are pushed forward, which causes the side plate 39 to rotate clockwise around the fixing pin 40. By projecting the movable wheels 38, 38 below the chassis 23, the front portion of the installation base 3 is lifted and supported.

Therefore, the installation base 3 is raised horizontally from the ground surface by the left and right fork parts 5, 5 and the left and right moving wheels 38, 38, and the moving wheels 38, 38 and the truck 1
The machine 2 mounted on the installation base 3 and the machine 2 can be transported and moved using the rear wheels 9, 9.

On the other hand, after moving the installation platform 3 and machine 2 to the work site, the truck frame 4 is lowered to the lowest position by operating the hydraulic switching lever 20 again, and the moving wheels 38, 38 are stored in the chassis 23, 23. , ground the installation base 3. After this, the pull-out pin 52 is inserted into the set pins 33, 33 and pulled upward, the connection between the track 1 and the installation base 3 by the set pins 33, 33 is released, and the track 1 is moved backward and separated from the installation base 3. It is.

Furthermore, by separately installing forks 29, 29 on the installation stand 3 connected to the truck 1, it is also possible to transport cargo loaded on general pallets.

"Effects of the Invention" As is clear from the above embodiments, the present invention consists of a track frame 4 in which the front wheels 6, 6 are provided on the left and right bifurcated fork parts 5, 5, and a rear wheel 9, 9 in the lower end, which can freely change direction. a master cylinder 7 attached to the pump 1; a plunger pump 16 that drives the cylinder 7 to raise and lower the track frame 4;
6, a fork insertion portion 32, into which the left and right fork portions 5, 5 are fitted;
32, and an engagement member 33 that removably connects the installation base 3 and the fork parts 5, 5, and a wheel support member 39 having a movable wheel 38 at one end. A movable wheel 38 is swingably attached to the end of the installation base 3 on the side opposite to the fork insertion via a support pin 40, and is provided with a movable wheel 38 that can freely project below the installation base 3, and a support shaft at the other end of the wheel support member 39. 43 is a slave rod 4 for controlling the wheel position up and down.
One end side of the rod 41b is connected, and the other end side of the rod 41b is connected to the fork insertion portions 32, 32 of the installation base 3.
On the other hand, a main rod 41a for controlling the wheel position up and down, which moves back and forth in conjunction with the raising and lowering of the truck frame 4 by the cylinder 7 and connects its tip side to the rod 41b, is connected to the left and right fork parts 5, 5, the fork insertion portions 32, 3 of the installation stand 3 on which the machine type 2 is mounted.
When the mounting base 3 is lifted by the cylinder 7 of the truck 1, the moving wheels 38 of the mounting base 3 are projected downward at the same time by using this lifting force. The rear wheels 9 of the truck 1 and the movable wheels 38 of the installation base 3 allow the truck 1 to be moved safely and easily together with the machinery on the installation base 3. In particular, in this case, the forks of the truck 1 The length of the parts can be made short and small, making the truck 1 small and lightweight, which provides excellent handling and operability, and the mounting base 3 is not limited by the truck 1, but can be made as large as a Class 2 machine. It is highly adaptable as it can be freely selected according to the size of the wheel 3.
There is no need to separately install a drive device for protruding or retracting the truck 8, and therefore it is possible to perform work with excellent operability using only the truck 1, and to work with various sizes and shapes using extremely simple means. It has remarkable effects, such as being able to carry out transportation work in an appropriate manner without any hindrance to Type 2 machinery, and being extremely practical.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional explanatory view of a main part, FIG. 2 is an overall side view, FIG. 3 is a plan view thereof, FIG. 4 is a partial side view, and FIG. 5 is a partial plan view. 1...Hand lift truck, 2...Machine, 3
...Equipment installation stand, 4...Truck frame, 5
...Fork part, 6...Front wheel, 7...Master cylinder, 9...Rear wheel, 16...Plunger pump,
18... Pumping handle, 32... Fork insertion portion, 33... Set pin (engaging member).

Claims (1)

[Scope of utility model registration request] A track frame 4 in which front wheels 6, 6 are disposed on the left and right forked forks 5, 5, a master cylinder 7 on which rear wheels 9, 9 are attached to the lower end so as to be able to freely change direction, and a master cylinder 7 that drives the cylinder 7 to rotate the track frame 4. In a hand lift truck device equipped with a plunger pump 16 for raising and lowering and a pumping handle 18 for operating this pump 16, a fork insertion part 3 into which the left and right fork parts 5 are fitted.
2 and 32, and an engagement member 33 that removably connects the installation base 3 and the fork parts 5 and 5, and a wheel support member 39 having a moving wheel 38 at one end is provided. A movable wheel 38 is swingably attached to the end of the installation base 3 on the side opposite to the fork insertion via a pivot pin 40, and is provided with a movable wheel 38 that can freely protrude below the installation base 3, and the wheel support member 39
One end of a slave rod 41b for controlling the wheel position up and down is connected to the support shaft 43 at the other end, and the other end of the rod 41b is connected to the fork insertion portion 32 of the installation base 3,
On the other hand, the main rod 41a for controlling the wheel position up and down, which moves back and forth in conjunction with the raising and lowering of the truck frame 4 by the cylinder 7 and connects its tip side to the rod 41b, is attached to the left and right fork portions 5. , 5. , 5.