JP4873494B2 - Attachment for low lift truck - Google Patents

Description

  The present invention relates to a low lift truck attachment for towing a cart.

  In wholesale trade, retail trade, manufacturing, etc., a system is adopted in which stocks of goods are stored in distribution centers established in various places, and goods are quickly delivered according to orders from retail stores or customers. . In this method, when the delivery destination of the stored product is determined, the stored products are collected from the warehouse for each delivery destination or every delivery route before the scheduled delivery date or immediately before delivery, and the packages are collected. A so-called picking operation is performed.

In this picking operation, a cart (picking cart) C as shown in FIG. 9 is used. Since the cart C has wheels W, it can be transported by human power, but it may be difficult to transport depending on the weight of the load. In this case, the cart C is often loaded and transported on the fork of the low lift truck (see, for example, Patent Documents 1 to 3).
Japanese Utility Model Publication No.59-112898 Japanese Utility Model Publication No. 1-142371 JP 2005-170593 A

  However, in the method of loading and transporting a cart on a fork of a low lift truck, the number of products that can be picked at a time is limited to the number of products that can be placed on the loaded cart. Therefore, when picking more products at a time, it is necessary to manually pull the number of carts corresponding to the number of products, which is a heavy labor.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an attachment for a low lift truck for placing and pulling a cart on a side while loading the cart on a fork. It is to provide.

  In order to solve the above-mentioned problems, the present invention is (1) an attachment for a low lift truck for towing a cart, and includes a hook that can be engaged with a rear portion of the cart, and the hook at a tip portion. And a base end portion of the arm that is attached to the lifting / lowering main body portion of the low lift truck, the storage position where the hook is close to the lifting / lowering main body portion, and the overhanging position where the hook projects outward from the lifting / lowering main body portion. When the cart is towed, the hook of the arm arranged in the extended position is attached to the rear part of the cart arranged on the side of the low lift truck. An attachment for a low lift truck characterized by being adapted to be engaged is provided.

  Further, the present invention is the above configuration, wherein (2) in the state where the arm is in the extended position, the hook has a projecting portion projecting upward, It is an object of the present invention to provide an attachment for a low lift truck, characterized in that a protruding portion can be inserted from below into a recess provided on the back side of the cart.

  In any one of the above-described configurations, the present invention is characterized in that (3) the arm is attached to the front surface of the elevating main body, and is supported rotatably on the shaft extending in front of the low lift truck. An attachment for a low lift truck, comprising: a plate-like arm piece, wherein the arm piece rotates about the axis between the storage position and the extended position. Is to provide.

  In the configuration (3), the present invention relates to (4) wherein the storage position is a position where the hook is close to the lifting main body portion, and the moment about the axis due to its own weight acting on the arm is A first stopper that is positioned to face a direction opposite to the direction of rotation of the arm from the storage position to the extended position, and the arm is disposed to oppose the moment at the storage position. It is intended to provide an attachment for a low lift truck, which is characterized by staying in that position by abutting with.

  According to the present invention, in the configuration (3) or (4), (5) the projecting position is a position where the hook projects to the side of the elevating body part, and is based on its own weight acting on the arm. The moment around the axis is set to a position that is opposite to the direction of rotation of the arm from the extended position to the retracted position, and the arm opposes the moment at the extended position. An attachment for a low lift truck is provided, which is adapted to stay in that position by abutting with a second stopper arranged in this manner.

  In the attachment for a low lift truck of the present invention configured as described above, an arm having a hook at the tip can project to the side of the lifting / lowering main body of the low lift truck. Therefore, according to the present invention, it is possible to pull the side cart while loading the cart on the fork by engaging the overhanging hook with the rear portion of the cart arranged on the side of the low lift truck. it can.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of a low lift truck provided with the attachment of the present invention, and FIG. 2 is a front view showing a main part of the low lift truck shown in FIG. 3 is a front view and a side view showing the attachment of FIG. 1, and FIG. 4 is a perspective view showing a hook in the attachment of FIG. FIG. 5 is a front view showing a preparation stage when the cart is pulled using the attachment of FIG. FIG. 6 is a view showing a lock device for fixing the cart loaded on the fork of the low lift truck. 7 is a front view showing a state where the cart is being pulled using the attachment of FIG. 1, and FIG. 8 is a side sectional view showing an operation when the hook of FIG. 4 engages with the cart.

[Constitution]
As shown in FIG. 1, the attachment 1 for a low lift truck according to the present embodiment is provided on an arm 3 that is rotatably attached to the front surface of a lift main body 11 of a low lift truck 10 and a tip 32 of the arm 3. The hook 4 is attached, and the stopper 5 is brought into contact with the arm 3 to stop the arm 3 at the storage position and the extended position.

  As shown in FIGS. 1 to 3, the arm 3 includes an arm piece 30, a shaft 36 that rotatably supports a base end portion 31 of the arm piece 30, and a boss portion provided at a distal end portion 32 of the arm piece 30. 33, 33 and grips 35, 35 provided in the middle part of the arm piece 30.

  The shaft 36 is attached to the front surface of the lift main body 11 of the low lift truck 10 so as to extend straight ahead of the low lift truck 10.

  As shown in FIG. 3, the arm piece 30 is made of a steel plate or the like formed in a substantially S shape. A bearing hole 30 a is provided in the base end portion 31 of the arm piece 30. By inserting the bearing hole 30 a into the shaft 36, the arm piece 30 is rotatably supported by the shaft 36.

  Boss portions 33 are attached to the lower end side of the distal end portion 32 of the arm piece 30 by welding or the like. Each of the boss portions 33, 33 is provided with a bearing hole 34 for supporting a shaft 41 of the hook 4 described later.

  As shown in FIG. 3B, a magnet 37 is attached to the upper end side of the distal end portion 32 of the arm piece 30. The magnet 37 abuts on a base portion 42a of the hook 4 described later and can be magnetically coupled.

  On the side surface of the intermediate portion of the arm piece 30, handles 35, 35 used when the arm piece 30 is rotated around the shaft 36 are attached by welding or the like.

  As shown in FIG. 4, the hook 4 is inserted into the hook piece 42 formed by bending a steel plate or the like in a substantially U-shape, a bearing portion 43 attached to the inside of the hook piece 42 by welding, and the like. And a shaft 41.

  The hook piece 42 includes a flat base portion 42a, a protruding portion 42b protruding substantially perpendicularly to the base portion 42a at one end of the base portion 42a, and a standing portion 42c rising in the same direction as the protruding portion 42b at the other end. It is made up of.

  The bearing portion 43 has a cylindrical shape and is disposed so as to contact the base portion 42a and the standing portion 42c of the hook piece 42. A shaft 41 is inserted into the bearing portion 43.

  As shown in FIG. 3, both ends of the shaft 41 are inserted into and supported by the bearing holes 34 of the boss portions 33, 33 in the arm piece 3. The hook piece 42 rotates around the shaft 41 and can take a folded position shown in FIG. 3A and a deployed position shown in FIG. 3B.

  In the folded position, the hook piece 42 is magnetically coupled to the magnet 37 and held in that position. Further, the hook piece 42 is held at the deployed position by balancing the moment around the shaft 41 due to its own weight and the moment caused by the reaction force received by the standing portion 42c coming into contact with the arm piece 30.

  As shown in FIG. 2, the arm 3 configured as described above rotates around the shaft 36 together with the hook 4 attached to the distal end portion 32. The arm 3 has a storage position (a two-dot chain line in FIG. 2) in which the hook 4 is located above the shaft 36 and immediately in front of the lifting body 11, and the hook 4 is located below the shaft 36. A projecting position (solid line in FIG. 2) projecting to the side of the elevating / lowering main body 11 can be taken.

  As shown in FIGS. 1 and 2, the stopper 5 is formed in a block shape, and is disposed in the vicinity of the shaft 36 on the front surface of the elevating body 11. The stopper 5 is configured such that when the arm 3 is in the storage position, the upper end surface 5 a (first stopper) abuts on the end surface 30 b of the base end portion 31 of the arm piece 30. The stopper 5 is configured such that the outer end surface 5 b (second stopper) abuts on the end surface 30 c of the base end portion 31 of the arm piece 30 when the arm 3 is in the extended position.

  On the arm 3 in the storage position, a moment around the shaft 36 due to its own weight, which is in a direction opposite to the direction of rotation to the overhanging position, acts. At the same time, a moment around the shaft 36 due to the reaction force received from the upper end surface 5a of the stopper 5 is applied to the arm 3 in a direction opposite to the moment due to its own weight. The arm 3 remains in the stowed position by the moment due to the reaction force being balanced with the moment due to its own weight.

  On the other hand, a moment around the shaft 36 due to its own weight, which is in the direction opposite to the direction of rotation to the storage position, acts on the arm 3 in the extended position. At the same time, a moment around the shaft 36 due to the reaction force received from the outer end surface 5b of the stopper 5 is applied to the arm 3 in a direction opposite to the moment due to its own weight. The arm 3 stays at the overhang position by the moment due to the reaction force being balanced with the moment due to its own weight.

[how to use]
Next, the usage method of the attachment 1 comprised as mentioned above is demonstrated with reference to drawings. 5 and 7, the cart is not shown on the right side, but this is merely omitted to show the state of the attachment 1, and the cart is arranged during normal use. Is done.

  First, the arm 3 in the storage position is rotated to the extended position by holding the handle 35 (see FIG. 2). At this time, the operator rotates the arm 3 against a moment around the shaft 36 due to its own weight acting on the arm 3 in the storage position.

  Next, a force is applied to the hook piece 42 in the folded position so that the hook piece 42 is rotated downward, the magnetic coupling between the magnet 37 and the hook piece 42 is canceled, and the hook piece 42 is rotated to the deployed position. (See FIG. 3B).

  Next, as shown in FIG. 5, the cart C1 to be loaded is placed on the fork 12 of the low lift truck 10 before lifting, and the cart C2 to be pulled is placed on the side of the cart C1.

  At this time, the cart C1 is fixed to the low lift truck 10 by holding the predetermined portion S1 of the frame S of the cart C1 between the fixed block B1 and the movable block B2 of the lock device R. 8A, the cart C2 is disposed such that the concave portion CP provided in the rear portion of the loading platform LP is positioned above the protruding portion 42b of the hook piece 42.

  The locking device R is provided above the elevating body portion 11 of the low lift truck 10 as shown in FIGS. As shown in FIG. 6, the locking device R includes a main body R1, a fixed block B1, movable blocks B2 and B2, and a lever L for moving the movable block B2. By operating the lever L, the movable blocks B2 and B2 are brought into an open state shown in FIG. 6A or a closed state shown in FIG. 6B via a link mechanism (not shown) housed in the main body R1. . With the movable blocks B2 and B2 opened, the frame S of the cart C1 is introduced between the movable blocks B2 and B2 and the fixed block B1, and then the movable blocks B2 and B2 are closed by the lever L. The frame S is sandwiched.

  Next, the low lift truck 10 is operated to lift the elevating main body 11 and the fork 12 as shown in FIGS. 7 and 8B. Thus, the cart C1 is loaded on the fork 12. At the same time, in the cart C2, the hook 4 of the attachment 1 is engaged with the concave portion CP.

  Then, the worker runs the low lift truck 10 and performs a picking operation while pulling the cart C2 with the attachment 1 while loading the cart C1 on the fork 12. When the picking operation is completed and it is no longer necessary to pull the cart C2, the arm 3 is rotated to the storage position after the hook piece 42 is returned to the folded position.

[effect]
According to the attachment 1 configured as described above, the arm 3 provided with the hook 4 at the tip can project to the side of the lift main body 11 of the low lift truck 10. Then, by lifting the elevating main body 11 of the low lift truck 10, the protruding portion 42 b of the hook 4 protruding to the side is provided at the rear part of the loading platform LP of the cart C <b> 2 disposed on the side of the low lift truck 10. It can be engaged with the recess CP. By running the low lift truck 10 in this state, the cart C2 can be pulled while the cart C1 is loaded on the fork 12.

  That is, according to the present invention, the cart C1 can be loaded on the fork 12, and the cart C2 can be arranged and pulled to the side of the fork 12, so that the number of products that can be picked at a time can be increased. .

  Further, according to the attachment 1, the hook 4 can be engaged with the concave portion CP of the cart C2 at the same time when the cart C1 disposed on the fork 12 is lifted. Therefore, a complicated operation is not required when the hook 4 and the cart C2 are engaged, and no effort is required.

  Further, according to the attachment 1, since the arm 3 can take the storage position and the overhanging position, if it is not necessary to pull the cart, the arm 3 is placed in the storage position so that the low lift It does not interfere with normal use of the truck 10.

  Further, since the hook 4 is folded at the storage position, a space in front of the elevating / lowering main body 11 is not increased, and the normal use of the low lift truck is not disturbed.

  Further, according to the attachment 1, a moment around the shaft 36 due to its own weight, which is opposite to the direction of rotation to the extended position, acts on the arm 3 in the storage position. . If a moment that overcomes the moment around the shaft 36 due to its own weight is not added, the arm 3 will remain in the stowed position. Therefore, according to the attachment 1, the arm 3 can be held at the storage position only by disposing the stopper 5 so as to oppose the moment due to its own weight, and no other holding means is required.

  Similarly, at the extended position, the arm 3 can be held at the extended position only by arranging the stopper 5 so as to oppose the moment due to its own weight, and no other holding means is required.

  There are several types of carts used for picking. However, since there is generally some kind of recess on the back of the loading platform of the cart, the types of carts that can be pulled are not limited.

[Modification]
Although the embodiments of the present invention have been specifically described above, the present invention can be implemented with the following modifications.

  In the said embodiment, although the protrusion part was provided in the hook and it was set as the structure which engages the said protrusion part with the recessed part of a cart carrier, the shape of a hook is not limited to this. The hook may have any shape as long as it can engage with the cart. For example, the hook may have a concave portion that can be engaged with the convex portion of the cart.

  Moreover, although it comprised so that an accommodation position and an overhang | projection position could be taken by rotating an arm in the surface orthogonal to the advancing direction of a low lift truck, it is not limited to this. For example, like an automobile door, the arm may be configured to rotate forward in the horizontal plane from the storage position along the side surface of the lifting main body, so that the arm moves to the extended position. You may comprise so that it may slide to a horizontal position from the storage position of the raising / lowering main-body part front side, and may move to an overhanging position.

  In the above embodiment, the attachment of the present invention is applied to a riding type low lift truck. However, the attachment may be any self-propelled low lift truck, for example, a so-called walkie type where an operator walks. May be.

It is a perspective view which shows an example of the low lift truck provided with the attachment of this invention. It is a front view which shows the principal part of the low lift truck of FIG. It is the front view and side view which show the attachment of FIG. It is a perspective view which shows the hook in the attachment of FIG. It is a front view which shows the preparation stage at the time of pulling a cart using the attachment of FIG. It is a figure which shows the locking device for fixing the cart loaded on the fork of a low lift truck. It is a front view which shows the state which is pulling the cart using the attachment of FIG. It is a sectional side view which shows the operation | movement at the time of the hook of FIG. 4 engaging a cart. It is a perspective view which shows the general cart used for a picking operation | work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Attachment 3 Arm 4 Hook 5 Stopper 10 Low lift truck 11 Lifting body part 12 Fork 31 Base end part 32 Tip part 33 Boss part 34 Bearing hole 35 Handle 36 Axis

Claims (5)

A low lift truck attachment for towing a cart,
A hook that can engage the rear of the cart;
An arm having the hook at the tip and a base end attached to the lifting main body of the low lift truck, the storage position where the hook is close to the lifting main body, and the hook being the lifting main body That can take the projecting position of projecting outward,
With
When the cart is towed, the hook of the arm arranged at the extended position engages with a rear portion of the cart arranged at a side of the low lift truck. Attachment for low lift truck. In the state where the arm is in the extended position, the hook has a protruding portion that protrudes upward, and the protruding portion is provided on the back side of the loading platform of the cart when raised with the lifting body portion. 2. The attachment for a low lift truck according to claim 1, wherein the attachment can be inserted into the recess from below. The arm includes a shaft attached to the front surface of the elevating main body and extending in front of the low lift truck, and a plate-like arm piece rotatably supported on the shaft.
The low lift truck attachment according to claim 1 or 2, wherein the arm piece is configured to rotate about the axis between the storage position and the extended position. The storage position is a position where the hook is close to the lift main body, and a moment around the axis due to its own weight acting on the arm causes rotation of the arm from the storage position to the extended position. It is a position facing the direction opposite to the direction,
The low arm according to claim 3, wherein the arm stays in the retracted position by abutting with a first stopper disposed to oppose the moment. Attachment for lift truck. The projecting position is a position where the hook projects to the side of the lifting main body, and a moment around the axis due to its own weight acting on the arm is changed from the projecting position of the arm to the storage position. It is the position facing the direction opposite to the direction of rotation,
5. The arm according to claim 3, wherein the arm stays at the projecting position by abutting with a second stopper disposed so as to oppose the moment. The low lift truck attachment described.

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