JPH07101697A - Container spreader device - Google Patents

Abstract

PURPOSE:To provide a container spreader device effective in relieving impact when the movement of extension/contraction rail is stopped. CONSTITUTION:In a container spreader device where a pair of extension/ contraction rails having twist lock pins to engage with hanging holes of a container are arranged movably in the lateral direction and a driving device is arranged for the extension/contraction rails, the device has a first detecting means 70 to detect approach to an end of an extension stroke of the extension/ contraction rails 14a and 16a and a second detecting means 72 to detect approach to an end of a contraction stroke of the extension/contraction rails 14a and 16a, and has a control means 80 to carry out reduction control on extension/contraction movement speed of the extension/contraction rails 14a and 16a through the driving device 24 according to an output signal from the first detecting means 70 or the second detecting means 72.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic container spreader device mounted on a cargo handling vehicle such as a forklift and used for cargo handling of a container, and more particularly, to control a telescopic movement speed of a telescopic rail in the container spreader device. Regarding

[0002]

2. Description of the Related Art Generally, a container spreader device is attached to an elevating member such as a lift bracket or a finger bar of a forklift truck and used for loading and unloading containers. That is, such a container spreader device has a spreader body attached to the elevating member, and includes a rail holder formed in a horizontally long rectangular tube shape on the front side of the spreader body. In the rail holder, telescopic rails, which consist of a pair of left and right and have twist lock pins at their ends, are arranged so as to be telescopically movable. Accordingly, the telescopic rail can be telescopically moved according to the size of the container, and the twist lock pins can be engaged with the fishing holes formed at both ends of the upper surface of the container so that the container can be supported and transported. It has become.

The extension and contraction movement of the telescopic rail is
Each is a small piece-shaped stopper provided on the holder side,
Braking is performed by contact with a small-piece-shaped stopper receiver provided at a position facing the stopper on the telescopic rail side, and as a result, the movement of the telescopic rail is forcibly stopped. After that, by operating a lever that controls the movement of the telescopic rail provided in the driver's seat, the movement of the telescopic rail will be completely stopped. The distance between the twist lock pins at the maximum extension and the maximum contraction of the telescopic rail obtained by these stoppers is adapted to match the distance between the hanging holes of two standard containers, large and small. As such a container spreader device, an actual Kaihei 1-174
The container spreader device disclosed in Japanese Patent No. 398 can be mentioned.

[0004]

By the way, the expansion / contraction of the telescopic rail is performed at a very high speed in order to speed up the work of container loading and unloading. The stopper that comes into contact with it receives a large impact. As a result, the stopper itself may be deformed due to wear or damage, or the stopper setting position may be displaced, and the distance between the twist lock pins obtained by this stopper and the standard hanging hole of the container However, there is a problem in that it is not possible to maintain a match with the distance in (1), which hinders the cargo handling of the container.
Further, there remains a problem that the impact when the movement of the telescopic rail is stopped is one of the causes of the failure of various instrumentation components arranged in the container spreader device. Therefore, the present invention, in view of the above problems,
It is a technical problem to be solved to provide a container spreader device which is effective in alleviating the impact when stopping the movement of the telescopic rail.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a pair of left and right rail holders installed on a spreader main body, each of which has a twist lock pin engaged with a fishing hole of a container at an end thereof. In a container spreader device in which a telescopic rail of the telescopic rail is movably provided in the lateral direction, and further, a drive device for laterally moving the telescopic rail is provided in the rail holder, in the extension movement of the telescopic rail, an approach to an end of an extension stroke is performed. And a second detection means for detecting an approach to the contraction stroke end in the contraction movement of the telescopic rail and for outputting an output signal, the first detection means or And a control means for reducing and controlling the extension / contraction movement speed of the extension / contraction rail via the drive device based on the output signal from the second detection means.

[0006]

In the container spreader device configured as described above, when the telescopic rail approaches the end of the extension stroke in the extension movement, the first detecting means detects the approach of the telescopic rail, and An output signal is issued to the control means for controlling the expansion / contraction speed to be reduced. And
The control means reduces the extension moving speed of the telescopic rail based on the output signal. Therefore, the extension speed of the telescopic rail is reduced at the end of the extension stroke. Similarly, when the telescopic rail approaches the end of the contraction stroke during the contracting movement, the second detecting means detects the approaching of the telescopic rail, and outputs an output signal to the control means for reducing and controlling the telescopic moving speed of the telescopic rail. Emit. And this control means
The contraction movement speed of the telescopic rail is reduced based on the output signal. Therefore, the contraction movement of the telescopic rail decreases at the end of the contraction stroke.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the container spreader device according to the present invention will be described below with reference to FIGS. First, an outline of a telescopic container spreader device will be described with reference to FIGS. 1, 2 and 3. The container spreader device 1 is generally mounted on an elevating member 3 including a lift bracket, a finger bar and the like of a forklift 2 as shown in FIG. Then, as shown in FIG. 1, the container spreader device 1 includes a spreader body 10 in which pillar members are combined in a vertically long substantially rectangular shape so as to be fixed to the front side of the elevating member 3. A hollow rail holder 11 formed in a horizontally long rectangular tube shape is attached to a front side portion of the spreader body 10.
A pair of left and right telescopic rails 14 and 16 are provided therein so as to be telescopically movable. These telescopic rails 14, 16
Are substantially L-shaped, and have arm portions 14a and 16a that slide in the rail holder 11, and column portions 14b and 16b that are bent and extend at right angles from the respective tips of the arm portions 14a and 16a.
And extension portions 14c and 16c that extend short in the front horizontal direction at the tops of the pillar portions 14b and 16b. Furthermore, twist lock pins 14d and 16d that can be engaged with fishing holes formed at both ends of the upper surface of the container C are provided on the lower side surfaces of the extending portions 14c and 16c so as to hang down. The arms 14a, 16a
Each has a hollow shape with a substantially rectangular cross section, and the arm portion 16a enters into the arm portion 14a when the telescopic rails 14 and 16 are contracted.

Next, based on FIG. 2, telescopic rails 14, 1
A drive device for expanding and contracting 6 will be described. The chain sprocket 2 is provided at both end positions on the rear surface of the rail holder 11 which supports the telescopic rails 14 and 16 so as to be telescopically movable.
0 and 22 are rotatably attached. One of the chain sprockets 20 transmits the drive of the hydraulic motor 24 because the shaft at the center of the chain sprocket 20 is connected to the output shaft of the hydraulic motor 24 that can rotate in both forward and reverse directions. Between the chain sprockets 20 and 22, chains 30 and 32, which are divided into two by interposing two connecting pieces 26 and 28, are stretched in a circuit form in series. That is, the chain 30 is suspended on the chain sprocket 20, and the chain 32 is suspended on the chain sprocket 22.
Each end of 32 is connected by connecting pieces 26 and 28. The two connecting pieces 26 and 28 are slidably supported on the back surface of the rail holder 11 and are substantially parallel to the arm portions 14a and 16a of the telescopic rails 14 and 16 and are horizontally long rail driving rods. One end of each of 34 and 36 is fixed, and the other ends are fixed to the lower sides of the pillar portions 14b and 16b of the telescopic rails 14 and 16, respectively.

Therefore, when the hydraulic motor 24 is driven to rotate, the chain sprocket 20 rotates and the chain 30 moves.
Is driven and the chain 32 is driven via the connecting pieces 26 and 28 to rotate the chain sprocket 22. Then, along with these rotational movements, the connecting piece 2
Since the rails 6 and 28 move in the longitudinal direction of the rail holder 11, that is, the left-right direction in FIG.
Similarly, 6 is moved in the longitudinal direction of the rail holder 11, that is, in the left-right direction in FIG. As a result, the telescopic rail 14,
16 can be moved in the longitudinal direction of the rail holder 11, that is, the horizontal direction in FIG.

That is, when the hydraulic motor 24 rotates clockwise, the rotation of the chain sprocket 20 causes
The chain 30 drives the connecting piece 28 so as to pull it to the left in FIG. The chain 32 is driven by the towed connecting piece 28 to drive the chain sprocket 2
While rotating 2, the connecting piece 26 is pulled rightward in FIG. Therefore, the rail driving rod 36 moves to the left in FIG. 2 as the connecting piece 28 moves to the left in FIG. 2, and the rail driving rod 36 moves to the right in FIG. 2 as the connecting piece 26 moves to the right. 34 will move to the right in FIG. As a result, the telescopic rails 14 and 16 are driven to contract and move.

Similarly, when the hydraulic motor 24 rotates counterclockwise, the chain 30 drives the connecting piece 26 to be pulled to the left in FIG. 2 through the rotation of the chain sprocket 20. The chain 32 is driven by the pulled connecting piece 26 to rotate the chain sprocket 22, and the connecting piece 28 is pulled rightward in FIG. Therefore, the rail driving rod 34 moves to the left in FIG. 2 as the connecting piece 26 moves to the left in FIG. 2, and the rail driving rod 34 moves to the right in FIG. 2 as the connecting piece 28 moves to the right. 36 is shown in FIG.
It will move to the right in. As a result, the telescopic rails 14 and 16 are driven so as to extend and move.

Next, the braking and stopping of the telescopic movement of the telescopic rails 14 and 16 will be described below with reference to FIGS. 1 and 2. As shown in FIG. 2, the rail driving rods 34, 3
In FIG. 6, thin vertically elongated stoppers 40 and 42 having a substantially rectangular parallelepiped shape are provided at the respective ends to which the connecting pieces 26 and 28 are attached. And, on the back surface of the rail holder 11,
Two small piece-shaped stopper receivers 44 and 46 are provided at positions facing the stoppers 40 and 42 and near the chain sprockets 20 and 22, respectively. It should be noted that the stopper receivers 44 and 46 are disposed between the rail driving rod 3 and
4, 36 and the chains 30, 32 are divided into two because of the clearance required to move. Therefore, as the telescopic rails 14 and 16 continue to extend, the stopper 4
0 and 42 come into contact with the stopper receivers 44 and 46, and the extensional movement of the telescopic rails 14 and 16 is forcibly stopped. Therefore, the stoppers 40, 42
By the stopper receivers 44 and 46, the telescopic rail 1
A maximum extension distance of 4, 16 is determined.

Further, as shown in FIG. 1, the telescopic rail 1
In the lower part of the inner side surface of the pillar portions 14b and 16b of 4, 16 at the most front side, a thin vertically elongated stopper 50 having a substantially rectangular parallelepiped shape,
52 is provided. Further, at the frontmost ends of both ends of the rail holder 11, stoppers 54 and 56, which are also thin and vertically long and have a substantially rectangular parallelepiped shape, are provided at positions facing the stoppers 50 and 52, respectively. Therefore, as the telescopic rails 14 and 16 continue to contract and move, the stopper 5
0, 52 and the stopper receivers 54, 56 come into contact with each other, and the contraction movement of the telescopic rails 14, 16 is forcibly stopped. Therefore, the maximum contraction distance of the telescopic rails 14 and 16 is determined by the stoppers 50 and 52 and the stopper receivers 54 and 56.

As described above, the telescopic rails 14 and 16
After the telescopic movement of the vehicle is forcibly stopped by the stoppers 40, 42, etc., the telescopic rail 1 installed in the driver's seat
The levers that control the movements of 4 and 16 are telescopic rails 14 and 1.
Operate so that 6 stops. As a result, the movement of the telescopic rail can be stopped completely. In addition, the stopper 4
The distance between the twist lock pins 14d and 16d at the maximum extension and the maximum contraction of the telescopic rails 14 and 16 determined by the maximum extension and contraction distances of the telescopic rails 14 and 16 obtained by 0, 42, etc. It is adapted to match the distance between the hanging holes of two standard containers C.

Further, as shown in FIG. 1, the rail holder 1
Non-contact type proximity switches 60 and 62 are provided on both ends of the upper surface of the column 1. At the positions facing the proximity switches 60 and 62, the pillar portions 14b and 16 of the telescopic rails 14 and 16 are provided.
Dogs 64 and 66 are provided on the inner side surface of b. Therefore, when the telescopic rails 14 and 16 continue the contraction movement and reach the maximum contraction distance, the proximity switches 60 and 62 detect the approach of the dogs 64 and 66. Then, based on a circuit configuration (not shown), it is displayed on the operation panel (not shown) that the telescopic rails 14 and 16 have reached the maximum contraction distance. Normally, the operator operates the levers that control the movement of the telescopic rails 14 and 16 so that the telescopic rails 14 and 16 stop based on the display on the operation panel. Although not shown, similar proximity switches and dogs are provided on the rear surface of the rail holder 11, and the arrival of the maximum extension distance of the telescopic rails 14 and 16 is displayed on the operation panel (not shown) of the driver's seat. It is like this.

Next, the first switch as the first detecting means and the second switch as the second detecting means will be described with reference to FIG. A body portion 70a forming a part of the first switch 70 is provided near the stopper receiver 44 on the uppermost side of the top surface of the rail holder 11. It should be noted that this main body 70a is provided with a hydraulic motor 24 described later.
Is connected to the control means 80. Further, the main body 70a is provided not directly above the stopper receiver 44, but somewhat closer to the stopper 40, that is, closer to the right side in FIG.
A tactile portion 70b made of a rigid wire material such as a piano wire is attached so as to hang from a side surface facing the same direction as the back surface of the. Further, the tactile portion 70b is provided on the telescopic rail 1.
It is set so as to be able to contact the stopper 40 that moves in the same manner as the movement of No. 4, and when the tactile portion 70b contacts the stopper 40, it is immediately before the stopper 40 contacts the stopper receiver 44. Therefore, the first switch 70 is
Since the tactile portion 70b contacts the stopper 40 immediately before contacting the stopper receiver 44, the approach of the telescopic rail 14 to the maximum extension can be detected immediately before that.
Based on this detection, the first switch 70 turns on the main body 70a.
A detection signal is transmitted to the control means 80 of the hydraulic motor 24. Since the telescopic rails 14 and 16 move in synchronization with each other, the first switch 70 operates as follows.
The approach of 6 to the maximum extension will be detected immediately before that.

On the other hand, a main body portion 72a forming a part of the second switch 72 is provided at one end of the upper surface of the rail holder 11 closest to the rear surface. The main body 72a is also connected to the control means 80 of the hydraulic motor 24 described later. Further, the main body 72a is provided on the rail holder 11
Like the first switch 70, a tactile part made of a rigid wire such as a piano wire is provided on the outermost end of the upper surface of the main body 72a and faces the same direction as the back of the rail holder 11. 72b is attached toward the telescopic rail 16. The tactile portion 72b is provided on the telescopic rail 1
When the tactile portion 72b contacts the pillar portion 16b of the telescopic rail 16, the telescopic rail 16 is the rail holder 1 most.
It is immediately before approaching 1, that is, just before the maximum contraction of the telescopic rail 16. Therefore, the second switch 72 can detect the approach of the telescopic rail 16 to the maximum contraction immediately before the tactile portion 72b comes into contact with the pillar portion 16b of the telescopic rail 16, and based on this detection. The second switch 72 sends a detection signal from the main body 72a to the control means 80 of the hydraulic motor 24. As in the case of the first switch, since the telescopic rails 14 and 16 move in synchronization, the second switch 72 operates in the telescopic rail 14
And the approach of 16 to the maximum contraction time will be detected immediately before that.

Next, the control means 80 of the hydraulic motor 24 will be described below with reference to FIGS. 4 and 5. First, as shown in FIG. 4, the control means 80 is provided with an oil tank 81 serving as a hydraulic pressure supply source for driving and controlling the hydraulic motor 24, and the hydraulic oil is supplied from the oil tank 81 to the pipeline 82. It is supplied to the hydraulic pump 83 via the. The hydraulic pump 83 is connected to and driven by an engine 84 mounted on the forklift 2. Then, the hydraulic oil pressurized by the hydraulic pump 83 is sent to any one of the ports of the solenoid type flow rate adjusting valve 85 having two ports via the conduit 82. The two ports include a port for sending out the amount of hydraulic oil as it is and a port for sending out the amount of hydraulic oil significantly. Further, the hydraulic oil supplied from any port of the flow rate adjusting valve 85 is sent to any port of the directional control valve 86 having three ports via the conduit 82. Among the three ports, a port that flows out without changing the inflow direction of the hydraulic oil, and a port that flows out the hydraulic oil so as to return to the oil tank 81 without flowing out from the direction switching valve 86,
There is a port that changes the inflow direction of hydraulic oil and flows out.
Then, the hydraulic oil supplied from any port of the direction switching valve 86 is sent to the hydraulic motor 24 via the pipe line 82 or the pipe line 87, thereby controlling the drive of the hydraulic motor 24. . That is, the direction switching valve 86 controls forward / reverse rotation of the hydraulic motor 24 and stop. Further, the hydraulic oil that has flowed out after driving the hydraulic motor 24 again flows into the port through which the directional control valve 86 passed through via the pipe line 82 or the pipe line 87, and the hydraulic oil that flows out from that port is It is returned to the oil tank 81 via the pipe line 87. In addition, a relief valve 88 communicating with the pipeline 87 is connected to the pipeline 82 so that the maximum pressure of the hydraulic oil in the pipeline 82 can be regulated to a predetermined pressure or lower.

The rotary drive of the hydraulic motor 24 is performed as described above in the section of the drive means for the telescopic rails 14 and 16.
Since the telescopic rails 14 and 16 are telescopically moved, the telescopic rails 14 and 16 perform extension movement, contraction movement, or stop telescopic movement depending on which port position the direction switching valve 86 is switched to. Is decided. The directional control valve 86 includes the above-described telescopic rail 14,
It is connected to a lever that controls the movement of 16.

Further, as shown in FIG. 5, the flow rate adjusting valve 85 is provided with a solenoid switching circuit 90 for controlling the port position switching of the flow rate adjusting valve 85. The solenoid switching circuit 90 is a battery 91 which is provided in advance on the forklift 2, and a first relay means 9 which is switched to an ON position based on an output signal of the first switch 70.
2, second relay means 93 that is switched to the ON position based on the output signal of the second switch 72, and the flow rate adjustment valve 85.
And a solenoid 94 for switching the port position of the. First relay means 92 and second relay means 93
And are connected in parallel to the battery 91,
It is normally urged in the off position by spring means or the like (not shown). When the first relay means 92 and the second relay means 93 are in the off position, the flow rate adjusting valve 8
The port position of 5 is set to a port that sends out the amount of hydraulic oil as it is. Then, when the first relay means 92 or the second relay means 93 is switched to the ON position, the solenoid 94 of the flow rate adjusting valve 85 is excited to switch the position to a port for greatly reducing the amount of hydraulic oil and sending it out. It is supposed to do.

The operation of the container spreader device 1 of the present embodiment having the above-described structure will be described. The telescopic rails 14 and 16 are extended to move the telescopic rail 1
Just before 4 and 16 reach the maximum extension distance, the first
The haptic part 70b of the switch 70 contacts the stopper 40,
An output signal is emitted from the first switch 70. Then,
The first relay means 92 switches to the ON position on the basis of the output signal, and the flow rate adjusting valve 85 causes the first relay means 9 to move.
The position is switched to the port that is excited by 2 and greatly reduces the amount of hydraulic oil and sends it out. As a result, the amount of hydraulic oil supplied to the hydraulic motor 24 is significantly reduced, and the hydraulic motor 24
Therefore, the rotational driving of the telescopic rails 14 and 16 is significantly reduced, and the extension and moving speed of the telescopic rails 14 and 16 is significantly reduced.

Similarly, when the telescopic rails 14 and 16 are contracted and moved, and just before the telescopic rails 14 and 16 reach the maximum contraction distance, the tactile portion 72b of the second switch 72 is moved.
Comes into contact with the pillar portion 16b of the telescopic rail 16, and an output signal is emitted from the second switch 72. Then, the second relay means 93 is switched to the ON position based on the output signal, and the flow rate adjustment valve 85 is switched to the port which is excited by the second relay means 93 and drastically reduces the amount of hydraulic oil to be sent out. . As a result, the amount of hydraulic oil supplied to the hydraulic motor 24 is significantly reduced, the rotational drive of the hydraulic motor 24 is significantly reduced, and the contraction movement speed of the telescopic rails 14 and 16 is significantly reduced.

Therefore, according to the container spreader device 1 of the present embodiment, the retracting movement speed of the telescopic rails 14 and 16 is the end of the extension and contraction strokes, that is, the telescopic rails 14 and 1.
Just before the maximum extension and contraction distance of 6 is reached, it is drastically and sharply reduced. As a result, the telescopic rails 14, 1
The stoppers 40 and 42 and the stopper receiver 4 that come into contact with each other to forcibly stop the telescopic movement of the telescopic rails 14 and 16 when 6 reaches the maximum extension and contraction distances.
In the cases of 4 and 46, only shocks that are significantly suppressed as compared with the conventional case are generated. As a result, it is possible to prevent the wear deformation of the stoppers 40, 42 and the stopper receivers 44, 46 and the displacement of the mounting position, and to extend and retract the rails 16, 16 determined by the stoppers 40, 42 and the stopper receivers 44, 46.
It is possible to keep the maximum extension distance and the maximum contraction distance of the constant. Therefore, the distance between the twist lock pins 14d and 16d at the time of maximum extension and maximum contraction of the telescopic rails 14 and 16 provided so as to match the distance between the hanging holes of the two large and small standard containers C is maintained. Therefore, it is possible to prevent the cargo handling work of the container C from being hindered.

Further, according to the container spreader device 1 of this embodiment, the stoppers 40 and 42 and the stopper receiver 4 are provided.
Non-contact proximity for displaying the arrival of the maximum contraction distance of the telescopic rails 14 and 16 on the operation panel of the driver's seat (not shown) by applying a shock that is remarkably suppressed as compared with the related art to Nos. 4 and 46. It is extremely effective in avoiding failures in various instrumentation parts including the switches 60 and 62.
Furthermore, according to the container spreader device 1 of the present embodiment, the telescopic rail 1 is configured by the tactile units 70b and 72b provided on the first switch 70 and the second switch 72.
Since reaching the maximum extension and contraction distances of 4 and 16 can be detected immediately before that, the telescopic rails 14 and 1
The moving speed of 6 can be reduced at once just before reaching the maximum extension and the maximum contraction distance. Therefore, even if the moving speed of the telescopic rails 14 and 16 is reduced as described above, the speed of moving the telescopic rails as in the conventional container spreader device is not reduced, and the speed of the telescopic rails 14 is almost the same. It is possible to perform the work of switching between 16 expansion / contraction movements.

The present invention is not limited to the above-mentioned embodiments, and may be implemented as follows, for example, with a part of the structure appropriately changed without departing from the spirit of the present invention. (1) In the above embodiment, the first switch 70 is provided on the upper surface of the rail holder 11 near the stopper receiver 44 to detect the approach of the stopper 40. However, the present invention is not limited to this. For example, the first switch 70 may be provided on the upper surface of the rail holder 11 near the stopper receiver 46 to detect the approach of the stopper 42. In short, the first switch 70 is the telescopic rails 14 and 1
It suffices if it is at a position where it can be detected immediately before reaching the maximum extension distance in the extension movement of 6. (2) In the above embodiment, the telescopic rail 16 is provided by providing the second switch 72 at one end of the upper surface of the rail holder 11.
However, the present invention is not limited to this. For example, the second switch 72 may be provided at the other end of the upper surface of the rail holder 11 to detect the approach of the pillar portion 14b of the telescopic rail 14. Further, the second switch 72 may be provided near the stopper receiver 54 or 56 to detect the approach of the stopper 50 or 52. The point is that, like the first switch 70, the second switch 72 only needs to be in a position where it can detect immediately before reaching the maximum contraction distance in contraction movement of the telescopic rails 14 and 16. (3) In the above embodiment, the control means 80 is configured so that the hydraulic oil flows out of the flow rate adjusting valve 85 and then into the direction switching valve 86, but the invention is not limited to this. The hydraulic oil may flow into the flow rate adjusting valve 85 after flowing out of the direction switching valve 86.

[0026]

As described in detail above, according to the present invention,
When stopping the extension / contraction movement of the extension / contraction rail, the extension / contraction movement speed of the extension / contraction rail can be significantly reduced.
As a result, it is possible to reduce the impact when stopping the extension / contraction movement of the extension / contraction rail.

[Brief description of drawings]

FIG. 1 is a schematic front view of a container spreader device embodying the present invention.

FIG. 2 is a schematic rear view of a container spreader device embodying the present invention.

FIG. 3 is a side view of a forklift equipped with a container spreader device embodying the present invention.

FIG. 4 is a schematic circuit diagram of control means according to the container spreader device of the present invention.

FIG. 5 is a schematic circuit diagram of a solenoid switching circuit of a flow rate adjusting valve according to a control means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Container spreader apparatus 10 ... Spreader main body 11 ... Rail holder 14 ... Telescopic rail 16 ... Telescopic rail 14d ... Twist lock pin 16d ... Twist lock pin 70 ... 1st switch 72 as 1st detection means 72 ... 2nd detection means Switch 70b as a ... Tactile part as a first rigid wire 72b ... Tactile part as a second rigid wire 80 ... Control means C ... Container

Claims (2)

[Claims] 1. A rail holder installed on a spreader body is provided with a pair of left and right telescopic rails having twist lock pins engaging with a fishing hole of a container attached to ends thereof so as to be movable in a lateral direction. A container spreader device in which a drive device for moving a telescopic rail in a lateral direction is provided in a holder, and first detecting means for detecting an approach to an end of an extension stroke in an extension movement of the telescopic rail and issuing an output signal, A second detection unit that detects an approach to the end of the contraction stroke in the contraction movement of the telescopic rail and outputs an output signal; and the drive device based on the output signal from the first detection unit or the second detection unit. A container spreader device comprising: a control means for controlling the extension / contraction movement speed of the extension / reduction rail via the control means. 2. The first detection means according to claim 1,
The first rigid wire rod provided on the rail holder detects the approach of the telescopic rail to the end of the extension stroke by contacting a part of the telescopic rail approaching the end of the extension stroke, and second detecting means. Is a container configured to detect the approach of the telescopic rail to the end of the contraction stroke by contacting a part of the telescopic rail approaching the end of the contraction stroke with the second rigid wire provided on the rail holder. Spreader device.