JP2009155035A - Hoisting accessary of wide pallet truck for sintering machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hoisting accessory for hoisting a wide pallet truck, lessening labor of a worker in hoisting the wide pallet truck by allowing locking parts inserted in hoisting arm receiving recesses to be locked at correct positions by using the shape of the hoisting arm receiving recesses without requiring position adjustment by manual work of the worker. <P>SOLUTION: The locking part 7 of a lower hoisting arm 3 of the hoisting accessory 1 is provided with a pawl 9 which is provided for projecting and retracting in a direction perpendicular to an insertion direction of the locking part to the hoisting arm receiving recess and is always biased to a retracting direction, and a pawl opening and closing means 11 which is able to project and retract along a moving direction of the locking part to the hoisting arm receiving recess, is always biased to a projecting direction and has a guide part 12 moving the pawl in a projecting direction with the movement in a retracting direction, and has a construction for projecting the pawl 9 with the movement of the pawl opening and closing means 11 in the retracting direction caused by the locking part 7 inserted in the hoisting arm receiving recess and contacting with a back surface of the hoisting arm receiving recess. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a lifting tool used when lifting a wide pallet truck that receives raw materials such as fine ore and moves a sintering process of a sintering machine for maintenance.

  Conventionally, in a sintering machine that sinters powder ore to a certain size to make ore agglomerates, multiple pallet trucks are arranged endlessly and circulated to sinter raw powder ore etc. Through. When the pallet truck is removed from the transport line due to maintenance or the like, a lifting device such as a crane is positioned above the transport line of the pallet truck, and the side of the pallet truck (in a direction orthogonal to the transport direction). A lifting tool having a suspension arm that hangs a lower end on a pair of wheels that are opposed to each other and has a pair of wheels that ride on a conveyance rail on each side portion is hung on a suspension hook of the lifting device. Is lowered and hung on a pallet truck to remove it from the transfer line.

As shown in Patent Document 1 and the like, the lifting tool used for lifting and lowering the pallet truck for the sintering machine has a lower suspension hanging from the support beam at each end of the support beam. The arm is pivotally attached so as to be rotatable in the longitudinal direction of the supporting beam, and the suspension arm receiver on the side of the pallet truck is configured with the lower end bent in a bowl shape of the lower suspension arm as a locking portion. When the lifting tool is raised by being inserted into the recess, the locking portion is hung on the suspension arm receiving portion.
And when hanging the lower suspension arm on the pallet carriage, lower the suspension while opening between the lower suspension arms above the pallet carriage, and place it with the support beam in contact with the pallet carriage. There is a mechanism in which each of the lower suspension arms pivots in the closing direction between the lower suspension arms when lifting the lifting tool, and the support beam rides directly or indirectly on the object to be lifted Various mechanisms have been proposed in which the lower suspension arm pivots in the closing direction by pulling it up.

For example, it is assumed that the upper suspension arm connected to the lower suspension arm is inclined toward the support beam side, and a stay-like shape is formed between the coupler suspended on the suspension hook of the lifting device and the upper suspension arm. The reinforcing member is handed over, one end of the reinforcing member is pin-joined to the upper suspension arm, and the other end is pin-joined to the coupler, and the reinforcing member is lifted as the coupler is lifted, There are links that rotate so that each arm is raised, and each lower suspension arm pivots in the closing direction between the lower suspension arms, and locks when each lower suspension arm pivots in the closing direction An operator may guide each part so as to be inserted into the suspension arm receiving recess of the pallet carriage.
When removing the suspension device having this link structure, if the support beam is placed on the pallet carriage as described above and the connector is further lowered so as to approach the support beam, the reinforcing members are also lowered and moved upward. The suspension arm falls into the support beam, and each lower suspension arm opens between the lower suspension arms, and the locking portion of the lower suspension arm is disengaged from the suspension arm receiving recess of the pallet truck, and the lower suspension arm is opened. The lifting tool can be returned from the pallet carriage to the standby position by raising the lifting tool while maintaining the lifting tool.
Japanese Patent Laid-Open No. 50-097054

In the above-mentioned sintering machine, for the purpose of improving production efficiency, a wide pallet truck having a pallet part wide in the direction orthogonal to the transport direction has been used for the transport line. The following problems have arisen by using.
That is, since the wide pallet truck is widened in the direction of hanging the lifting tool, the suspension arm receiving recess on the side of the main body of the carriage is positioned below the widening part, and the lower suspension arm interferes with the widening part. In order to allow the locking portion to be inserted into the suspension arm receiving portion without doing so, the length of the locking portion (the length of the locking portion in the feeding direction) has been increased.
However, since the suspension arm receiving recess itself is hidden under the widening portion, the worker can feed the locking portion of the lower suspension arm to the appropriate position of the suspension arm receiving recess while the worker is standing. If the locking part is sent to the suspension arm receiving recess and the lifting tool is raised in a state of being shifted, the locking part is locked while being displaced from the appropriate position in the suspension arm receiving recess. Cannot be corrected, and the widened pallet truck lifted becomes difficult to stabilize. For this reason, there has been a problem that the worker has to bend and feed the locking portion while looking at the suspension arm receiving recess.

  Therefore, in view of the above circumstances, the present invention provides a suspension arm receiver for hanging a wide pallet truck in which the inner surface of the recess in the suspension arm receiving recess is inclined and the recess space tapers upward in a substantially tapered shape. Using the shape of the recess, it is an object to lock the locking part inserted into the suspension arm receiving recess at an appropriate position without the need for manual position adjustment by the operator. The purpose is to reduce the labor of workers.

  The present invention has been made in consideration of the above problems, and has a suspension arm receiving recess under each of the opposing widened portions of the pallet, and the side of the carriage and the bottom of the carriage in the suspension arm receiving recess are open. The widening pallet carriage for a sintering machine in which the inner surface of the concave portion positioned in a direction orthogonal to the opposing direction of the widening portion is inclined and the concave space of the suspension arm receiving concave portion tapers upward in a substantially tapered shape. A lower suspension arm hanging from the support beam is pivotally supported at each end of the support beam so as to be rotatable in the longitudinal direction of the support beam, and directed to the upper end of the lower suspension arm toward the support beam side. A reinforcing member is passed between the upper suspension arm that is connected in an inclined manner and a coupler that is located above the support beam and is hooked by the lifting hook of the lifting machine, and one end of the reinforcing member is suspended from the upper suspension arm. Pinned to the arm An end is pin-joined to the coupler, and a lower end of the lower suspension arm is provided with a locking portion that can be inserted into the suspension arm receiving recess of the widening pallet carriage for the sintering machine, The upper suspension arm is rotated upward by the upward movement, the lower suspension arm is pivoted in the closing direction between the lower suspension arms, and the locking portion of the lower suspension arm is the suspension arm of the wide pallet truck for the sintering machine. In the hanger provided so as to be insertable into the receiving recess, the locking portion is provided so as to protrude and retract in a direction perpendicular to the insertion direction of the locking portion with respect to the hanging arm receiving recess and is always urged in the sinking direction. And a guide portion that is capable of projecting and retracting along the approaching direction of the locking portion with respect to the suspension arm receiving recess and is always biased in the projecting direction, and that moves the nails in the projecting direction by movement in the sank direction. Nail opening and closing means having And a hook is inserted into the suspension arm receiving recess, and the claw is protruded by the movement of the claw opening / closing means in the sinking direction by contact with the rear surface of the suspension arm receiving recess. A lifting tool for a widening pallet truck for a knot is provided to solve the above-mentioned problems.

  In each of the wide pallet trucks, the suspension arm receiving recess itself is located on the center line along the width direction of the wide pallet truck (hanging tool hanging direction). For this reason, according to the present invention, the lower suspension arm is aligned with the center position of the wide pallet truck with the operator's register, and the lower suspension arm is rotated in the closing direction so that the locking portion is Inserted in the suspension arm receiving recess, the claw opening and closing means of the locking part abuts the back surface of the suspension arm receiving recess, so that the claw protrudes, and when the lifting tool is lifted, inside the recess of the suspension arm receiving recess When the claw comes into contact with the side surface, the locking portion is guided and locked at an appropriate position in the suspension arm receiving recess. This eliminates the need to guide the locking portion to an appropriate position while the worker is bent, and can greatly reduce labor during the lifting operation of the wide pallet.

Next, the present invention will be described in detail based on the embodiment shown in FIGS.
In the figure, 1 is a lifting tool used to suspend the widening pallet truck a for the sintering machine. The widening pallet truck a for the sintering machine has suspension arm receiving recesses c on both sides of the main body of the pallet that are under the widening part b of the pallet projecting opposite in the cart width direction, The side of the carriage and the lower part of the carriage are open. Then, as shown in FIG. 2, in this suspension arm receiving recess c, the two recess inner surfaces d positioned in the direction orthogonal to the facing direction of the widened portion b (the carriage width direction) are inclined, and the two recesses A concave space formed by the inner surface d, the concave inner surface e on the central side of the carriage, and the concave top surface f is formed as a space that tapers upward in a substantially tapered shape.

The suspension arm receiving recess c is located on a center line passing in the cart width direction, and the lifting tool 1 is placed in the cart width direction so as to be on the center line of the wide pallet cart a. It is something to hang.
As shown in FIG. 1, the hanger 1 has a lower suspension arm 3 that hangs down from both ends of a horizontal support beam 2, and the lower suspension arm 3 rotates in the longitudinal direction of the support beam 2. The support beam 2 is pivotally supported so as to be movable. Further, an upper suspension arm 4 that is inclined toward the center side of the support beam 2 is connected to the upper end of each of the lower suspension arms 3. The arm 3 is rotated about the pivotal support portion of the support beam 2, and when the upper suspension arm 4 is rotated to the support beam 2 side, the lower suspension arm 3 is opened in the direction between the lower suspension arms. When the upper suspension arm 4 pivots in the direction that occurs with respect to the support beam 2, the lower suspension arm 3 rotates in the closing direction between the lower suspension arms.

Further, a member for rotating the upper suspension arm 4 is connected to the upper suspension arm 4, and as shown in the figure, a connector that is positioned above the support beam 2 and that holds the suspension hook of the lifting machine. A stay-like reinforcing member 6 is located from 5 to each of the upper suspension arms 4. The reinforcing member 6 has one end pin-connected to the tip of the upper suspension arm 4 and the other end pin-connected to the coupler 5, and when the hoist 1 is pulled up by a lifting machine or the like, When the coupler 5 moves away from the support beam 2, the upper suspension arm 4 is rotated in the direction in which the upper suspension arm 4 is raised by the reinforcing member 6 that moves upward together with the coupler 5, and the lower suspension arm 3 is moved to the support beam 2. The lower suspension arm 3 is rotated in the closing direction between the lower suspension arms up to a right angle position, and the lower suspension arm 3 is positioned in a state perpendicular to the support beam 2.
Further, the extension line of the reinforcing member 6 to the support beam 2 side with the pin joint point between the reinforcing member 6 and the upper suspension arm 4 as one end is always the rotation center of the upper suspension arm 4 (with respect to the lower suspension arm of the support beam). From the state where the upper suspension arm 4 is at an angle with respect to the support beam 2, the coupler 5 is brought closer to the support beam 2 from the pivotal support position) through the center side of the support beam 2. When lowered, the upper suspension arm 4 is pivoted so as to fall to the support beam 2 as the reinforcing member 6 is lowered, and the lower suspension arm 3 is pivoted in the opening direction between the lower suspension arms. At the time when 4 overlaps with the support beam 2, the lower suspension arm 3 is provided so that the rotation in the arm opening direction stops.

(Locking part)
A support beam 2 is placed on the lower end of each lower suspension arm 3 so as to correspond to the center position in the width direction of the wide pallet carriage for the sintering machine, and the lower suspension arm 3 is rotated in the closing direction between the arms. A locking portion 7 is provided that is inserted into the suspension arm receiving recess of the widening pallet truck for the sintering machine when moved.
As shown in FIGS. 3 and 4, the locking portion 7 accommodates a pair of claws 9 whose tips can come into contact with the inner surface d of the recessed portion of the suspension arm receiving recess c on the locking portion main body 8. The two claws 9 are provided so as to be able to project and retract in directions opposite to the insertion direction of the locking portion 7 in opposite directions, that is, along the direction in which the inner surface d of the recess faces. The two claws 9 are always urged in the sinking direction by the spring 10. (See Figure 3)

Further, a claw opening / closing means 11 is accommodated on the distal end side of the locking portion main body 8 of the locking portion 7 so as to be able to project and retract along the entering direction of the locking portion 7, and is always attached in the protruding direction by the spring 10. It is energized. Further, the claw opening / closing means 11 is located between the two claws 9 and protrudes and retracts with both side surfaces slidably brought into contact with the respective claws 9. When the claw opening / closing means 11 is moved in the direction in which the claw opening / closing means 11 is submerged between the claw 9 that is drawn and sunk toward the claw 9, the claw 9 is provided with a guide portion 12 formed of a slope that guides each claw 9 in the protruding direction. The opening / closing means 11 is provided so that the nail opening / closing means 11 is maintained in a depressed state so that the two claws 9 are sandwiched between the nail opening / closing means 11 and the protruding state of each of the claws 9 is maintained. Yes. (See Figure 4)
Further, when the claw opening / closing means 11 moves in the protruding direction, each of the claws 9 is submerged into the locking portion main body 8 by the action of the spring 10.
Note that the locking portion main body 8 is a combination of steel plates so that the claw 9 and the claw opening / closing means 11 can be moved, but in order to clarify the configuration of the locking portion 7 in the figure. A member that stops the one end side of the spring 10 that urges the claw 9 in the sunk direction, and a member that stops the one end side of the spring 10 that urges the claw opening / closing means 11 in the protruding direction. Each is schematically illustrated with a virtual line.

In this way, the locking portion 7 of each lower suspension arm 3 protrudes when the claw opening / closing means 11 protrudes so as to protrude and retract and when the claw opening / closing means 11 retracts so as to be immersed in the locking portion main body 8. Since the claw 9 is provided, if each of the lower suspension arms 3 is rotated in the inter-arm closing direction and the locking portion 7 is inserted into the suspension arm receiving recess c, the recess back surface e of the suspension arm receiving recess c And the claw opening / closing means 11 are moved into the locking portion main body 8 so that the claw opening / closing means 11 is submerged. Projecting toward the end, and the projecting state is maintained.
If the lifting tool 1 with the claw 9 protruding from the locking portion 7 is gradually lifted, each inner surface d of the recess is inclined, so that the claw 9 abuts against the inner surface d of the recess. If the locking portion 7 is guided to an appropriate position in the suspension arm receiving recess c, and further the claws 9 are in contact with the inner surface d of the recess (FIG. 4), the widening pallet carriage for the sintering machine Will be lifted.
Further, the suspended widening pallet carriage for the sintering machine is lowered to a predetermined position, and the lifting tool 1 is lowered until the support beam 2 is placed on the pallet portion of the widening pallet carriage for the sintering machine, and then the suspension arm receiving recess c is engaged. The stop 7 is lowered and the claws 9 are separated from the inner surface d of the recess. Then, by lowering the coupler 5 with the support beam 2 riding on the pallet part, the lower suspension arm 3 rotates in the arm-to-arm opening direction, and the claw opening / closing means 11 protrudes away from the concave inner surface. Thus, each of the claws 9 is drawn into the locking portion main body 8, and the locking portion 7 of the lower suspension arm 3 comes out of the suspension arm receiving recess.

In the present suspension 1, a lock is provided between the coupler 5 and the support beam 2 so that the distance between the coupler 5 and the support beam 2 is maintained at a distance that opens the lower suspension arm 4 when the suspension is lifted. Each time the coupler 5 is lowered so that the device 13 is located and the hanger 1 is lowered and the distance from the support beam 2 is equal to or less than a predetermined value, the operation and non-operation of the lock device 13 are alternately switched. Is provided.
Thereby, after lowering the widening pallet carriage for the sintering machine to a predetermined position, the lower suspension arm 3 is opened while the coupler 5 is continuously lowered, and further the lock by the lock device 13 is operated. Thus, the lower suspension arm 3 is maintained, and if the suspension tool 1 is pulled upward in this state, the suspension tool 1 can be easily separated from the widening pallet carriage for the sintering machine, The lifting and unloading work of the wide pallet truck becomes easier.

(Suspension set)
For example, FIG. 5 shows a set of hanger 1. In the form shown in FIG. 5, the locking device 13 is operated, and the lower suspension arm 3 is maintained between the lower suspension arms in the opening direction so that the coupler 5 and the support beam 2 are maintained. It is regulated by the locking device 13 that operates between the two. In this state, the hanger 1 is hung above the widening pallet carriage for the sintering machine and then lowered, and the support beam 2 is placed on the widening pallet carriage for the sintering machine.
(Suspension lock)
FIG. 6 shows a state in which the lifting tool 1 is locked to the widening pallet carriage for the sintering machine. After the support beam 2 is placed on the widening pallet carriage for the sintering machine during the above-described setting, the coupler 5 is further connected. Is lowered, and the locking device 13 is changed from operating to non-operating by the lowering of the coupler 5. Then, the upper suspension arm 4 is raised by gradually raising the coupler 5, and the lower suspension arm 3 rotates in the closing direction between the lower suspension arms. By the rotation, each of the locking portions 7 of the lower suspension arm 3 enters the suspension arm receiving recess c.
When the claw opening / closing means 11 of the locking part 7 comes into contact with the recess back surface d of the suspension arm receiving recess c, each of the claw 9 protrudes and the entire lifting tool 1 is lifted so that the locking part 7 is described above. Thus, the wide arm pallet truck for the sintering machine is lifted by being locked in the suspension arm receiving recess c at an appropriate position.

(Removing the lifting tool)
After lowering the widening pallet carriage for the sintering machine to the required place with the lifting tool 1 (the locking device is not activated), the support beam 2 is lowered so as to ride on the widening pallet carriage for the sintering machine, In this state, the coupler 5 is lowered. As described above, the lower suspension arm 3 is rotated in the opening direction between the lower suspension arms by the lowering of the coupler 5, and the locking portion 7 is detached from the suspension arm receiving recess c. At this time, the claw opening / closing means 11 protrudes, moves in the direction in which the claw 9 is sunk along the moving guide portion 11a, and is accommodated in the locking portion main body 8.
At this time, the locking device 13 is changed from the non-actuated state to the activated state by the lowering of the coupler 5, and the open state of each of the lower suspension arms 3 is maintained. The lifting tool 1 is lifted to leave the widening pallet truck for the sintering machine. (Fig. 7)

(Hanging device storage)
FIG. 8 shows the retracted state of the hanger 1, and the upper receiver 14 is received so that the coupler 5 of the hanger 1 in which the lock device 13 is activated and the lower hanger arm 3 is in the open state is not lowered. Then, it is installed on a gantry 16 having a lower support 15 for receiving the support beam 2. Thus, if the hanging tool 1 is installed on the dedicated mount 16, the hanging tool 1 can be easily stored and managed.

It is explanatory drawing which shows an example of the lifting tool of the wide pallet truck for sintering machines which concerns on this invention, and the wide pallet truck for sintering machines. It is explanatory drawing which shows the suspension arm receiving recessed part of the wide pallet cart for sintering machines. It is explanatory drawing which shows the state in which the nail | claw is sunk in the latching | locking part in an example. It is explanatory drawing which shows the state which the nail | claw protrudes in the latching | locking part in an example. It is explanatory drawing which shows the state which sets the hanging tool of an example to the wide pallet cart for sintering machines. It is explanatory drawing which shows the state which made the hanging tool of an example latched to the wide pallet cart for sintering machines. It is explanatory drawing which shows the state which separated the lifting tool of an example from the wide pallet cart for sintering machines. It is explanatory drawing which shows the retracted state of an example lifting tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Suspension tool 2 ... Supporting beam 3 ... Lower suspension arm 4 ... Upper suspension arm 5 ... Connector 6 ... Reinforcement member 7 ... Locking part 8 ... Locking part main body 9 ... Claw 11 ... Claw opening / closing means 12 ... Guide part 13 ... Locking device a ... Widening pallet carriage for sintering machine b ... Widening part c ... Suspension arm receiving concave part d ... Inner side face of concave part e ... Back face of concave part f ... Top face in concave part

Claims (1)

A suspension arm receiving recess is provided below each of the opposed widened portions of the pallet, and the side of the carriage and the lower side of the carriage in the suspended arm receiving recessed portion are opened and positioned in a direction perpendicular to the facing direction of the widened portion. The inner surface of the concave portion to be inclined is a hanging tool for a widening pallet carriage for a sintering machine in which the concave space of the suspension arm receiving concave portion tapers upward in a substantially tapered shape.
A lower suspension arm hanging from the support beam is pivotally supported at each end of the support beam so as to be pivotable in the longitudinal direction of the support beam, and is connected to the upper end of the lower suspension arm with an inclination toward the support beam. A reinforcing member is passed between the upper suspension arm that is positioned above the support beam and a coupler to which the lifting hook of the lifting machine is hooked, and one end of the reinforcing member is pin-joined to the upper suspension arm The end is pinned to the coupler,
At the lower end of the lower suspension arm, provided with a locking portion that can be inserted into the suspension arm receiving recess of the widening pallet carriage for the sintering machine,
The upper suspension arm pivots upward by the upward movement of the coupler with respect to the support beam, the lower suspension arm pivots in the closing direction between the lower suspension arms, and the locking portion of the lower suspension arm becomes a sintering machine. In the suspension provided so that it can be inserted into the suspension arm receiving recess of the wide pallet truck for use,
The locking portion includes a claw provided so as to be able to project and retract in a direction perpendicular to the insertion direction of the locking portion with respect to the suspension arm receiving recess, and constantly biased in the sinking direction, and a locking portion with respect to the suspension arm receiving recess. A claw opening / closing means having a guide portion that is capable of projecting and retracting along the approach direction and being constantly biased in the projecting direction and moving the claw in the projecting direction by movement in the sank direction,
A sintering machine having a structure in which a latching portion is inserted into a suspension arm receiving recess and the nail is protruded by movement of the nail opening / closing means in a sinking direction by contact with a rear surface of the suspension arm receiving recess. Widening pallet trolley hanger.

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