JP2013245054A - Safety device for battery type cargo handling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a stopper member for fixing a battery from being unmounted.SOLUTION: A battery housing part 22 to be mounted with a battery case 21, housing a plurality of batteries B, to be freely inserted/extracted is formed in a vehicle body, the battery housing part 22 is provided with a battery fixation device 30 including a detachable stopper pin restraining the battery case 21 from moving and a pin detector for detecting the stopper pin, and a vehicle controller is provided with an interlock mechanism for a battery stopper for stopping the operation of a traveling device and a cargo handling device when the pin detector does not detect the stopper pin.

Description

  The present invention relates to a safety device that can prevent a battery from dropping or breaking in a battery-type cargo handling vehicle such as a forklift.

  For example, Patent Literature 1 discloses a battery fixing device for a battery forklift. This fixing device is formed at the base end portion of the stopper member by causing the stopper member to protrude into the fixing hole of the fixing frame and fitting the upper side portion of the battery case into the engaging groove formed at the tip of the stopper member. An engagement piece of a lock arm rotatably provided on the fixed frame is engaged with the lock hole.

JP 2010-149939 A

  According to the above configuration, after replacing the battery case, the stopper member is attached to the fixing hole, the battery case is engaged by the engagement groove, and the stopper member is fixed by operating the lock arm. It can be fixed securely.

  However, if the battery replacement operation is rushed or performed simultaneously with other operations, the stopper member may be forgotten to be installed. In such a case, since the battery case is not fixed to the vehicle body, the electric wiring part may be damaged due to acceleration or vibration due to running on a slope, sudden start, sudden braking, work, or damage due to collision with the battery cover. The battery case could fall.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a safety device for a battery-type cargo handling vehicle that solves the above-described problems and prevents the stopper member for fixing the battery from being unmounted.

The invention described in claim 1 is a safety device for a battery-type cargo handling vehicle in which a traveling device and a cargo handling device are driven by a battery mounted on a vehicle body,
Forming a battery housing part in which a battery case housing a plurality of batteries is detachably mounted on the vehicle body,
A battery fixing device having a detachable stopper member for restricting movement of the battery case and a stopper member detector for detecting the stopper member is provided in the battery housing portion,
The vehicle controller is provided with a battery stopper interlock mechanism that stops the operation of the traveling device and the cargo handling device when the stopper member detector does not detect the stopper pin.

The invention according to claim 2 is the configuration according to claim 1,
While forming an opening through which the battery case can be taken in and out on one side of the battery housing part, a support member for supporting the battery case from below is provided at the bottom of the battery housing part,
Forming a fork insertion part into which a fork for carrying in and out the battery case can be inserted along the back part from the opening part between the support members,
The opening is provided with a case locking member that abuts against the front of the bottom of the battery case on the opening side and restricts forward movement,
The battery fixing device is configured such that the stopper member is disposed above one side on the opening side of the battery housing portion and prevents the battery case from being lifted beyond the case locking member.

The invention according to claim 3 is the configuration according to claim 1 or 2,
The battery stopper interlock mechanism is configured to output an operation signal to the warning device when the stopper member is not detected by the stopper member detector.

  According to the first aspect of the present invention, the stopper member for restricting the movement of the battery case and the stopper member detector for detecting whether or not the stopper member is attached are provided, and the stopper member detector is provided by the battery stopper interlock mechanism. Based on the detection signal, the travel device and the cargo handling device are stopped when the stopper member is not attached, so that it is possible to prevent the forgetting to attach the stopper member and to securely mount and fix the battery case. it can.

  According to the second aspect of the invention, in the method of placing and replacing the battery case on the fork of another forklift, the battery fixing device can be easily and easily prevented by lifting the opening side of the battery case with the stopper member. The battery case can be securely fixed to the battery housing portion with a simple structure.

  According to the third aspect of the present invention, since the driver is warned by the warning device when the stopper pin is not attached, it is possible to reliably prevent forgetting to attach the stopper pin.

BRIEF DESCRIPTION OF THE DRAWINGS It is Example 1 of the battery-type forklift provided with the safety device which concerns on this invention, and is the side view of the state which removed the battery cover. It is a side view of a forklift. It is a perspective view which shows the battery accommodating part provided in the vehicle body. It is a top view which shows a battery accommodating part. (A)-(c) shows a battery fixing device, (a) is a top view, (b) is a front view, (c) is a side view. It is a block diagram which shows a safety device. It is a flowchart which shows operation | movement of a safety device.

[Example 1]
Embodiments of a battery-type forklift having a safety device according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 2, this battery-type forklift has a pair of driving front wheels 12 that are rotationally driven by a driving motor (traveling device) at the front of a vehicle body 11 and a steering device (steering device) at the rear. And a pair of rear wheels 13 for steering to be driven. A lift device (a cargo handling device) 14 having a hydraulic lift cylinder 14a is disposed at the front of the vehicle body 11, and a travel drive motor is driven by the battery B mounted on the vehicle body 11, and is driven by the battery. Pressure oil is supplied from the hydraulic device to the steering device and the lift cylinder 14a.

  A balance weight 15 is mounted at the rear of the vehicle body 11 to balance the weight with the cargo handling load. In the lift device 14, a carriage (not shown) is supported on a pair of left and right masts 14b that can be extended and retracted via a winding transmission mechanism including a sprocket and a chain, and the carriage is supported by a carriage via a backrest 16. A pair of forks 17 is provided so as to be adjustable in the width direction.

  In addition, a pair of left and right front posts 18a erected on both sides of the control panel of the driver's seat, a pair of left and right rear posts 18b erected on both sides of the front portion of the balance weight 15, the front post 18a and the rear post A head guard 18 is formed by a guard member 18c attached to the upper end of 18b. A notch 19 is formed on one side of the guard member 18c (left side in the figure) for hanging and inserting a battery case 21 described later with a wire rope or the like.

  As shown in FIGS. 1, 2 to 4, a battery housing portion 22 in which a battery case 21 housing a plurality of batteries B is mounted is formed at the center of the vehicle body 11. The left and right side walls 22F and 22B and the left and right side walls (left side in the figure) 22L are surrounded, and the other side (left) side wall part is opened to form an opening 25. The battery housing portion 22 is covered with a bonnet 23 having a driving seat 24 on the upper surface, and the bonnet 23 is attached to the front portion of the balance weight 15 so as to be freely opened and closed. The opening 25 is formed so that the battery case 21 can be inserted and removed using another forklift, and upper and lower side panels 26U and 26D covering the opening 25 are detachably attached.

  Three support rails (support members) 27 that respectively support the battery case 21 from below are laid on the bottom of the battery housing portion 22 at the front, center, and rear. A fork insertion space 28 into which a fork can be inserted is formed between 27 and between the support rails 27 at the center and the rear. Further, a case locking block 29 for restricting the movement of the battery case 21 from the opening 25 to the outside is attached to the end of each support rail 27 on the opening 25 side. Here, when the battery case 21 floats higher than the height of the case locking block 29, the battery case 21 passes over the case locking block 29 and protrudes from the opening 25 through the side panels 26U and 26D, or is supplied due to misalignment. There is a risk of wire breakage.

  In order to prevent this, as shown in FIG. 5, a battery fixing device 30 is installed in the vicinity of the right rear post 18 b which is the rear upper part of the opening 25. The battery fixing device 30 is mounted on a support post 31 erected on the battery accommodating portion 22 in a mounting hole 32 formed in the vicinity of the upper end portion in the front-rear direction, and detachably mounted in the mounting hole 32. A stopper pin (stopper member) 33 that can prevent the stopper pin 33 from lifting, a pin fixture 34 that prevents the stopper pin 33 from coming off from the mounting hole 32, and a pin detector that detects the stopper pin 33 mounted in the mounting hole 32 ( (Stopper member detector) 35 and cooperates with the case locking block 29 to fix the battery case 21.

  The pin fixture 34 has a latching rod 34a that protrudes laterally from the stopper pin 33, and a latching plate 34b that latches the latching rod 34a. The latching plate 34b is formed of a spring steel plate. ing. The latch plate 34b is attached in an open state so that the latch rod 34a is fitted to a mounting plate 34c that protrudes laterally from the support post 31, and the latch rod is fitted from above. 34a is configured to be pressed and fixed to the retaining plate 34bs mounting plate 34c.

  The pin detector 35 includes a detector main body 35a attached to a bracket 36 that protrudes rearward from the upper end of the support post 31, and is supported so as to be swingable downward from the detector main body 35a. It is comprised with the urged striker 35b.

  As shown in FIG. 6, it is confirmed whether or not the stopper pin 33 for fixing the battery case 21 is securely attached. When the stopper pin 33 is not attached, the battery stopper interlock mechanism 41 causes the forklift to lift. The safety device according to the present invention is provided to prevent the battery case 21 from shifting, popping out, or falling off by stopping the traveling and cargo handling. That is, the battery stopper interlock mechanism 41 is provided in the main controller (vehicle controller) 42 of the forklift. The main controller 42 drives a traveling motor 43 and a hydraulic pump motor 44 for generating hydraulic pressure, which is a driving source of the lift device 14, by the electric power of the battery B. Operation control signals are output to the hydraulic pump motors 44, respectively. As shown in FIG. 7, if the pin detector 35 does not detect the mounting of the stopper pin 33, an operation signal is sent from the battery stopper interlock mechanism 41 of the main controller 42 to the warning display unit (warning device) 45. For example, the warning lamp of the warning display unit 45 is turned on, or the warning buzzer of the warning display unit 45 is activated when a predetermined time elapses to notify the driver. Further, stop signals are output to the traveling motor 43 and the hydraulic pump motor 44, respectively, to stop traveling of the forklift and the cargo handling operation. Here, the steering is not stopped. This is because, for example, when the battery stopper interlock mechanism 41 is working due to disconnection or the like, it must be towed and carried to the inspection factory. If the steering is stopped here, it is difficult to carry. It is to become.

  According to the above embodiment, the case locking block 29 for restricting the movement of the battery case 21, the stopper pin 33 for regulating the lifting of the battery case 21 beyond the case locking block 29, and the mounting of the stopper pin 33. When the pin detector 35 does not detect the stopper pin 33 by the battery stopper interlock mechanism 41, the travel motor 43 and the hydraulic pump motor 44 are stopped and the travel is stopped. Therefore, forgetting to attach the stopper pin 33 is prevented, and the battery case 21 can be securely mounted and fixed.

  Further, in a system in which a battery case is mounted on a fork of another forklift and exchanged, the battery fixing device 30 prevents the battery case 21 from being lifted by the stopper pin 33, so that the battery can be easily and simply structured. The case 21 can be fixed to the battery housing part 22.

  Furthermore, since the driver is warned from the warning display section 45 when the stopper pin 33 is not attached, forgetting to attach the stopper pin 33 can be reliably prevented.

11 Body 12 Front wheel 13 Rear wheel 14 Lift device 15 Balance weight 17 Fork 21 Battery case 22 Battery housing portion 25 Opening portion 27 Support rail 28 Fork insertion space 29 Case locking block 30 Battery fixing device 31 Support post 32 Mounting hole 33 Stopper pin 34 pin fixture 35 pin detector 41 battery stopper interlock mechanism 42 main controller 43 travel motor 44 hydraulic pump motor 45 warning display

Claims (3)

A safety device for a battery-type cargo handling vehicle in which a traveling device and a cargo handling device are driven by a battery mounted on a vehicle body,
Forming a battery housing part in which a battery case housing a plurality of batteries is detachably mounted on the vehicle body,
A battery fixing device having a detachable stopper member for restricting movement of the battery case and a stopper member detector for detecting the stopper member is provided in the battery housing portion,
The vehicle controller is provided with a battery stopper interlock mechanism that stops the operation of the traveling device and the cargo handling device when the stopper member detector has not detected the stopper member. apparatus. While forming an opening through which the battery case can be taken in and out on one side of the battery housing part, a support member for supporting the battery case from below is provided at the bottom of the battery housing part,
Forming a fork insertion part into which a fork for carrying in and out the battery case can be inserted along the back part from the opening part between the support members,
The opening is provided with a case locking member that abuts against the front of the bottom of the battery case on the opening side and restricts forward movement,
The battery fixing device is characterized in that the stopper member is arranged above one side on the opening side of the battery housing portion, and the battery case is configured to prevent the battery case from floating above the case locking tool. Safety device for battery-operated cargo handling vehicles. The battery stopper interlock mechanism is configured to output an operation signal to a warning device when the stopper member is not detected by the stopper member detector. Safety device.

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