JPH0537996Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention provides a sub-lift called a remote control pallet truck ( The present invention relates to a parent-child lift that is removably equipped with a sub-lift (hereinafter referred to as a sub-lift), and specifically relates to a guide pulley for guiding piping and wiring drawn out from the main lift side to the sub-lift side.

(Prior Art) A parent-child lift is used, for example, when loading and unloading a shipping container. -Disclosed in Publication No. 7181.

In general, in a parent-child lift, as shown in the schematic diagrams of FIGS. 7 and 8, a child lift 4 is attached to a lift bracket 3 as an elevating member that is moved up and down along a mast 2 of a parent lift 1 via a hook 5. It is a removable type that can be hung and fastened. The child lift 4 is equipped with a drive unit 7 using an oil motor as a drive source on the main body 6 side, and an auxiliary wheel 9 on the leg 8 side corresponding to a fork. It is equipped with a power steering cylinder for steering and a lift cylinder for raising and lowering the legs 8. That is, the child lift 4 itself is equipped with a lifting device, a traveling device, and a steering device for cargo handling work, and by remotely controlling each of these devices on the main lift side, the child lift 4 can move the transport container as shown in the figure. The container C is loaded and unloaded with cargo by traveling inside the container C.

On the other hand, the hydraulic piping for the hydraulic actuators of each of the devices is provided with a hose reel 12 on the rear side of the head guard 10 of the main lift 1, and two hoses drawn out from this hose reel 12, one for oil supply and one for oil return. 11 is guided to the slave lift 4 via a drum-shaped guide pulley 22 installed at the top of the mast 2, and its ends are connected to hydraulic piping on the slave lift 4 side via hose couplers, respectively. ing. The other end of the hose 11 is connected to the hydraulic unit of the main lift 1 via a pipe or the like.

In addition to the above-mentioned hydraulic piping, a power supply cable 16 for supplying control current to a solenoid valve in the hydraulic piping on the child lift 4 side is also wired between the parent lift 1 and the child lift 4. As in the case of hydraulic piping, the power supply cable 16 is also pulled out from the cable reel 17 installed on the head guard 10 of the main lift 1, and is guided to the child lift 4 via a guide pulley 22 that is common to the hose, and its end is It is connected to the cable on the child lift 4 side via a connector.

(Problem that the invention aims to solve) By the way, the parent-child lift may be used as a normal forklift by replacing the child lift with another attachment, such as a standard fork, and in that case, the hose on the parent lift side Since there is no need for a cable or a power supply cable, it can be hung and held near the mast using a suitable auxiliary tool so as not to get in the way. Then, when the child lift is subsequently reinstalled, that is, when it is used as a parent-child lift again, the hose and power supply cable that have been suspended in this way are attached to the reel in order to be reconnected with the piping and power supply cable on the child lift side. Although it overcomes the unwinding force and pulls out forward, there is a problem in that the guide pulley acts as a pull-out resistance for the hose and power supply cable.

In other words, the guide pulley is formed into a drum shape with a length equivalent to the width of the mast so that it can accommodate the side shift mechanism, and is commonly used for hoses and cables. When pulling out a cable, for example, when pulling out an oil supply hose, other hoses that are in contact with the guide pulley, that is, the oil return hose and the oil supply cable, act as rotational resistance for the guide pulley. However, the operator had to pull out the hose or the power cable by overcoming the pulling resistance of the guide pulley, making the pulling operation difficult.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to facilitate the work of pulling out a hose or a power supply cable when the hose or power supply cable is connected.

(Means for Solving the Problems) The present invention for solving the above problems is that the hoses and power supply cables pulled out from the reel of the parent lift are placed at the upper end of the inner mast in order to guide them to the child lift side. The main idea is that the drum-shaped guide pulley is divided into parts corresponding to the number of hoses and power supply cables, and each of the divided small pulley parts is rotatably attached to a pulley shaft horizontally suspended on a pulley bracket. do.

(Function) Therefore, when connecting the hose or power supply cable on the parent lift side to the piping or wiring on the child lift side, pull out the hose or power supply cable from the reel to the length required for connection. Each small pulley divided in correspondence with the hose or power supply cable rotates individually. That is, the hose or the power supply cable can be easily pulled out while rotating the small pulley part without being affected by other small pulley parts.

(Example) Hereinafter, an example of the present invention will be specifically described based on the drawings. Note that the general structure of the parent-child lift is the same as the conventional one, so a description thereof will be omitted. Two hoses 11 for oil sending and oil return
is pulled out from the hose reel 12 installed at the top of the rear end of the head guard 10, and the mast,
Specifically, it passes between a guide pulley 22 rotatably attached to a pulley bracket 23 fixed to the upper end of the inner mast 2 and a retaining bar 24, and is pulled out to the child lift 4 side.
It can be connected to a rotary joint 13 corresponding to the end of the hydraulic piping on the side via a hose coupler 14. In addition, this hose coupler 14
is a conventionally known hose coupler in which a so-called male coupler 14a and a female coupler 14b are attached and detached by inserting and removing them.In this embodiment, the male coupler 1
4a is attached to the end of the hose 11, and a female coupler 14b is attached to the rotary joint 13. A stopper rubber 15 is attached to the end of the hose 11 at the base of the male coupler 14a, and the stopper rubber 15 is set to a thickness that does not allow it to pass through the gap between the guide pulley 22 and the stopper bar 24. has been done.

In addition, as in the case of the hose 11, the power supply cable 16 is pulled out from the cable reel 17 installed at the rear upper end of the head guard 10, and passes between the guide pulley 22 and the retaining bar 24 to the child lift 4 side. The plug 18 that has been pulled out and attached to its end is connected to the adapter 2 attached to the end of the power supply cable 19 on the child lift 4 side.
It is designed to be connected by inserting it into 0. Note that the plug 18 has a thickness that does not allow it to pass through the gap between the guide pulley 22 and the stopper bar 24. In addition, the power supply cable 19 on the child lift 4 side
is guided by a curved cable guide 21 attached to the main body 6 and equipped with a retainer.

As shown in FIG. 3, the guide pulley 22 has a three-part structure that corresponds to the oil supply and oil return hoses 11 and the power supply cable 16, thereby reducing pull-out resistance (rotation resistance). ing. That is, the guide pulley 22 as a whole is formed into a long drum shape in the axial direction, and is divided into three small pulley parts 22a, 22b, and 22c in the axial direction, and each of the small pulley parts 22
a, 22b, and 22c are individually rotatably supported via bearings 26 on a pulley shaft 25 horizontally suspended on a pulley bracket 23.

Moreover, among the small pulley parts, a collar 27 is formed on the outside of the small pulley parts 22a and 22c located on both sides, and the other parts are left without a collar. This is the hose 11 or the power supply cable 16 when the parent-child lift is equipped with a so-called side shift device.
This is done to allow movement in the lateral direction. Further, the adjacent small pulley portions 22a, 2
2b and 22c have a slight gap between them by the collar 28. In addition, the pulley bracket 23 is
In order to facilitate the assembly of the small pulley parts 22a, 22b, 22c, they are divided approximately at the center in the axial direction, and after the guide pulley 22 is assembled, they are connected by bolts 30 via the connection plate 29. There is.

In addition, the pulley bracket 23 is equipped with a hose 11 that has been separated from the child lift 4 side as shown in FIG.
A hose hook 31 and a cable hook 37 for hanging and holding the power supply cable 16 are vertically installed in parallel. The hose hook 31 is formed into a cross shape by a vertical plate 32 and a horizontal plate 33 fixed to the vertical plate 32, and the upper end of the vertical plate 32 is fixed to the lower surface of the pulley bracket 23 with a bolt 34. . At both ends of the horizontal plate 33, two-pronged hooking portions 35 are bent and protrude horizontally toward the front, and the groove width of the hooking portions 35 is formed to be slightly wider than the hose 11. has been done. That is, with the hose 11 fitted into the hooking portion 35 of the horizontal plate 33, the stopper rubber 15 of the hose 11 is hooked. In addition, a holding piece 35a bent downward is provided at the tip of the fork-shaped hanging part 35, and the holding piece 35a is designed to maintain the hanging posture of the hose 11 by coming into contact with the front surface of the stopper rubber 15 in the hanging state. It's summery.

Further, on the vertical plate 32 of the hose latching device 31, two upper and lower locking pins 36 for temporarily securing the hose are provided horizontally protruding forward at a predetermined interval.
The distance between the locking pins 36 is appropriately set depending on the thickness and flexibility of the hose 11. That is, when the hose 11 is pulled out, the two upper and lower locking pins 36 temporarily hold it in the pulled-out position by utilizing the frictional force generated when the hose 11 is entwined in a substantially S-shape. In particular, both of the locking pins 36 in this embodiment are head pins so that they do not easily come off when the hose 11 moves forward.

On the other hand, the cable hook 37 is formed into a vertically long plate shape, and its upper end is fixed to the pulley bracket 23 with a bolt 37a, and its lower end has two horizontally protruding parts facing forward. It is provided with a fork-shaped hook portion 38. This hook part 3
The width of the groove 8 is set to a size that allows the power supply cable 16 to pass through, and the flange 18a of the plug 18 is hooked thereto. Further, the bifurcated hook portion 38 is provided with a downwardly bent holding piece 38a for maintaining the hooking position, as in the case of the hose hook 31.

Further, a locking pin 39 with a head is provided at a position above the locking part 38 of the cable locking tool 37 for temporarily securing the cable, and this locking pin 39 and the locking pin 39 below the locking pin 39 are provided with The stop portion 38 constitutes a temporary stop for the power supply cable 16.

This embodiment is configured as described above,
The effect will be explained below.

When used as a parent-child lift, parent lift 1
The side hose 11 and power supply cable 16 are connected to the sub-lift 4 side as shown in FIGS. 1 and 2.

In such a state, when detaching the child lift 4 from the parent lift 1 in order to replace it with another attachment, the hose coupler 14 of the hose 11 is first separated into the male coupler 14a and the female coupler 14b, that is, the hose 11 is removed from the child lift 1. After disconnecting from the lift-side piping, the stopper rubbers 15 of these hoses 11 are respectively hooked to the corresponding hook portions 35 of the hose hook 31, as shown in FIG. Further, the plug 18 of the power supply cable 16 is pulled out from the adapter 20 of the power supply cable 19 on the sub-lift 4 side, and then it is latched to the latching portion 38 of the cable latching tool 37. Hose 11 hung in this way
The power supply cable 16 is held in a predetermined tension state by receiving the unwinding force of the hose reel 12 and the cable reel 17, and is held in a predetermined tension state by the holding pieces 35a and 38.
By restricting movement in the disengagement direction by a, the desired locked state can be maintained even when subjected to vibrations etc. during traveling. Note that the separated male coupler 14a,
The female coupler 14b, the plug 18, and the adapter 20 are covered with suitable caps (not shown),
Prevent dust and rainwater from entering.

Now, when reinstalling the child lift 4, the hose 11
After the power supply cable 16 is detached from the hooking parts 35 and 38, it is pulled out forward by overcoming the unwinding force of the reels 12 and 17 and connected to the child lift 4 side. force is reduced. That is, when pulling out the hose or cable, in addition to the unwinding force of the hose reel 12 or cable reel 17, the guide pulley 22
acts as a pull-out resistance, and in the case of a conventional commonly used guide pulley, for example, when the oil supply hose 11 is pulled out, the oil return hose 1
1 and the power supply cable 16 act as rotational resistance for the guide pulley 22, so the pull-out resistance added by the guide pulley 22 becomes large. However, according to the present embodiment, the guide pulley 22 is divided into three parts, and each of them can freely rotate when the guide pulley 22 is pulled out, so that the pulling resistance caused by the guide pulley 22 is slight. In other words, the operator can pull out the hose 11 or the power supply cable 16 with enough force to overcome the unwinding force of the hose reel 12 or cable reel 17.

After being pulled out, the hose 11 is connected to the piping on the secondary lift side by connecting the hose coupler 14. However, prior to the connecting operation, the hose 11 is temporarily fixed in the pulled-out position using a temporary fastener. do.
That is, as shown in FIG.
When the hoses 11 are tied together in a square shape, the hoses 11 are held in place by frictional force, so the hose coupler 14 can be connected in this state. Therefore,
The operator can easily connect the hose coupler 14 without being affected by the unwinding force of the hose reel 12. Note that after the connection, if the hose 11 is removed from the locking pin 36, the hose 11 can be removed.
is tensioned to a predetermined tension by the unwinding force of the hose reel 12.

In addition, in the case of the power supply cable 16, after the power supply cable 16 is pulled out from the cable reel 17 by a predetermined amount, it is entangled with the locking pin 39 and the locking part 8 in an approximately inverted S shape as shown in FIG. If attached, the power supply cable 16 will be connected as in the case of the hose 11 described above.
The plug 2 is latched and held in a state where the unwinding force of the cable reel 17 is not applied.
1 and the adapter 20 can be easily connected.

Next, the embodiment shown in FIG. 6 will be described. This example is an example of a change in the shape of the small pulley parts 22a, 22b, 22c in the guide pulley 22, and each small pulley part 22a, 22b, 22c
As shown in the figure, each is formed into a substantially spindle shape with an expanded center. That is, this example utilizes the habit of the hose 11 and the power supply cable 16 to approach the middle and high part of the center due to the above configuration, and the two hoses 11 and the power supply cable 16 are always connected to the corresponding small pulley parts 22a and 22b. , 22c. In the case of a parallel pulley without a middle part, for example, if the hose 11 is connected in a twisted state while being used as a parent-child lift, when the child lift 4 is pulled out and moves away from the parent lift 1. , the hose 11
may shift on the guide pulley 22 in the direction of untwisting and move toward the adjacent small pulley section. Then, when the child lift 4 returns, there is a problem that it cannot return to the initial position on the guide pulley, which is not rewound while remaining in the moved position. However, according to this modification, the above disadvantages are solved.

In this embodiment, two temporary fixing pins 36 are provided on the hose hook 31 side, and one temporary temporary fixing pin 39 is provided on the cable hook 37 side. However, the number can be changed as appropriate, and if the frictional force is insufficient, the number can be increased. Further, in this embodiment, the locking pins 36 are arranged vertically, but it may be changed to a configuration in which they are arranged laterally, and furthermore, the shape is not limited to the headed pin as shown in the figure, for example. It can be changed as necessary, such as using a tapered pin with a thick tip or a square pin, and if possible, it is also possible to use bifurcated parallel opposing horizontal pieces that constitute the hooking part 35. do not have. Furthermore, in this embodiment, the guide pulley 22 is divided into three parts for the three power supply cables 16 and hoses 11, but no matter how many cables and hoses there are, the same effect can be achieved if the guide pulleys 22 are divided into more than that number. The effect of this can be obtained.

(Effects of the invention) As detailed above, according to the invention, the guide pulley has a divided structure corresponding to the number of hoses and power supply cables, and when pulling out, the divided small pulley part connects the hoses and power supply cables. Since they rotate individually in response to the cables, it is possible to easily pull out the hose and power supply cable with less force than before. Further, since the guide pulley consisting of the small pulley portion is formed into a drum shape as a whole, it can cope with the side shift action without any problem.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a longitudinal sectional view showing details of the guide pulley, and Fig. 4 is a view of the hose and power supply cable. FIG. 5 is a perspective view showing how the temporary fasteners for hoses and power supply cables are used; FIG. 6 is a front view showing an example of a change in the shape of the small pulley part. , FIG. 7 is a schematic side view of the parent-child lift, and FIG. 8 is a plan view thereof. 1... Main lift, 4... Child lift, 11... Hose, 12... Hose reel, 16... Power supply cable, 17... Cable reel, 22... Guide pulley, 22a, 22b, 22c... Small pulley ,
23...Pulley bracket, 25...Pulley shaft.

Claims (1)

[Scope of utility model registration request] A drum-shaped guide pulley placed at the upper end of the inner mast to guide the hoses and power supply cables pulled out from the reel of the parent lift to the child lift side.It is divided into parts according to the number of hoses and power supply cables. A guide pulley for guiding piping and wiring of a parent-child lift, in which the divided small pulley parts are individually rotatably attached to a pulley shaft suspended horizontally on a pulley bracket.