JP6335501B2 - Pallet fixing device - Google Patents

Description

  The present invention relates to a pallet fixing device for a forklift.

  The pallet fixing device is a device that fixes a pallet supported by a fork of a forklift vehicle to the fork, as described in Patent Document 1, for example.

Japanese Patent No. 4257953

  In the invention described in Patent Document 1, since the fork is configured as a part of the fixing device, it is difficult to replace only the fork. That is, the fork is a consumable item that is assumed to be replaced regularly or irregularly, whereas the fixing device is not a consumable item.

  For this reason, when the fork is configured as a part of the fixing device, when the fork is replaced, it is necessary to take a work form such as disassembling the fixing device or replacing the fork together with the fixing device. Therefore, it is difficult to replace only the fork.

  An object of this invention is to provide the fixing device which can replace | exchange only a fork easily in view of the said point.

  In order to achieve the above object, the present invention provides a pallet fixing device for fixing a pallet (P) supported on a fork (4) of a forklift vehicle to the fork (4), wherein at least the pallet (P) is a fork (4). When fixing to the fork (4), the operation unit (11) operated by the operator and the pallet (P) are fixed to the fork (4), and the fixing unit is operated in conjunction with the operation of the operation unit (11) ( 12) and an assembling part for detachably assembling the apparatus main body with respect to the vehicle body (2) and the fork (4), and at least one of the vehicle body (2) and the fork (4) It is provided with the assembly part (21A) assembled | attached to the to-be-assembled part (3B) provided.

  Thereby, in this invention, an apparatus main body can be assembled | attached to a vehicle body (2) and a fork (4) so that attachment or detachment is possible. That is, the apparatus main body according to the present invention is an independent member for the vehicle body (2) and the fork (4). Therefore, only the fork (4) can be easily replaced.

  In the present invention, (a) the apparatus main body is assembled to both the vehicle body (2) and the fork (4) and is detachable from the vehicle body (2) and the fork (4), and (b) the apparatus main body. Is assembled to the vehicle body (2) and is detachable from the vehicle body (2) and the fork (4), and (c) the apparatus main body is assembled to the fork (4) and the vehicle body (2) and the fork (4). ) May be any of the configurations that can be freely attached to and detached from.

  Further, (A) when assembling the apparatus main body to at least one of the vehicle body (2) and the fork (4), the apparatus main body is directly assembled to at least one of the vehicle body (2) and the fork (4); B) Any configuration may be employed in which the apparatus main body is indirectly assembled to at least one of the vehicle body (2) and the fork (4).

  Incidentally, the reference numerals in parentheses for each of the above means are examples showing the correspondence with the specific means described in the embodiments described later, and the present invention is indicated by the reference numerals in the parentheses of the above respective means. It is not limited to specific means.

1 is an external perspective view of a forklift according to an embodiment of the present invention. It is a front view of the cargo handling part 3. FIG. 1 is a perspective view of a pallet fixing device 10 according to a first embodiment of the present invention. 1 is a perspective view of a pallet fixing device 10 according to a first embodiment of the present invention. 1 is an enlarged perspective view of a pallet fixing device 10 according to a first embodiment of the present invention. (A)-(c) is a figure which shows the use condition of the pallet fixing apparatus 10 which concerns on 1st Embodiment of this invention. It is a perspective view of the pallet fixing device 10 which concerns on 2nd Embodiment of this invention. It is a perspective view of the pallet fixing device 10 which concerns on 3rd Embodiment of this invention. (A) is a perspective view of the pallet fixing device 10 which concerns on 4th Embodiment of this invention. (B) is AA sectional drawing of Fig.9 (a). It is a perspective view of the pallet fixing device 10 which concerns on 5th Embodiment of this invention.

  The “embodiment of the invention” described below shows an example of the embodiment. In other words, the invention specific items described in the claims are not limited to the specific means and structures shown in the following embodiments.

  In the present embodiment, the present invention is applied to a pallet fixing device for a reach type forklift vehicle (hereinafter referred to as a forklift). The arrow indicating the direction given to each drawing, the dimensions of each component, and the like are described for easy understanding of the relationship between the drawings. The present invention is not limited to the directions and dimensional relationships shown in the drawings.

  At least one member or part described with at least a reference numeral is provided, except where “plurality”, “two or more”, and the like are omitted. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1. As shown in FIG. 1, the forklift 1 has a vehicle body portion 2 and a cargo handling portion 3. The vehicle body portion 2 is provided with a power portion (not shown) such as an electric motor or a battery. The cargo handling unit 3 is an operation unit that performs cargo handling, and is provided on the front side of the vehicle body unit 2.

  The cargo handling unit 3 is provided with an elevating mechanism (not shown), a carriage 3A, and the like. The lifting mechanism moves the carriage 3A up and down. The lifting mechanism includes a rope, a pulley, and a hydraulic cylinder that lifts and lowers the pulley.

  The carriage 3A is provided with a fork support member (hereinafter abbreviated as a support member) 3B to which the fork 4 is assembled. The support member 3B is a beam-like member extending in the horizontal direction (left-right direction). The support member 3B according to the present embodiment is a cylindrical or columnar shaft member.

  The fork 4 has a claw portion 4A, a hanger portion 4B, and the like, and is configured in an L shape. The claw portion 4A is a portion extending in the horizontal direction from the carriage 3A. The hanger portion 4B is a portion that rises upward from one end side in the longitudinal direction of the claw portion 4A.

  As shown in FIG. 2, a supported portion 4D for assembling the fork 4 to the support member 3B is provided at the upper end of the hanger portion 4B. The supported portion 4D is a cylindrical member having an assembly hole 4C into which the support member 3B can be inserted.

  A positioning plate 3C extending in parallel with the support member 3B is provided above the support member 3B. The plate 3C is a strip-shaped member whose both longitudinal ends are fixed to the carriage 3A. The plate 3C is provided with a plurality of recesses 3D along the longitudinal direction. The recess 3D according to the present embodiment is a through hole that penetrates the plate 3C in the vertical direction.

  The pin 3F is a columnar member that is detachably fitted into the recess 3D. An engaged portion 4E is provided on the upper surface of the supported portion 4D. The engaged portion 4E is a through hole through which the pin 3F passes, and engages with the pin 3F when the pin 3F is inserted.

  When the pin 3F is fitted in the recess 3D and the pin 3F and the engaged portion 4E are engaged, the fork 4 is restricted from being displaced in the horizontal direction. That is, the pin 3F, the recess 3D, and the engaged portion 4E constitute a fork regulating mechanism that regulates the displacement of the fork 4 in the horizontal direction.

2. Pallet fixing device The pallet fixing device 10 is attached to the cargo handling part 3 of the forklift 1, as shown in FIG. The pallet fixing device 10 is for fixing the pallet P supported by the fork 4 to the fork 4. That is, the pallet fixing device 10 prevents the claw portion 4A inserted into the insertion hole P1 of the pallet P from coming out of the insertion hole P1.

  In the present embodiment, a pallet fixing device 10 is provided for each of the pair of forks 4. The pallet fixing device 10 on the right side of the paper has only a left-right opposite structure to the pallet fixing device 10 on the left side of the paper, and the basic structure is the same. Hereinafter, the pallet fixing device 10 according to the present embodiment will be described using the pallet fixing device 10 on the right side of the drawing as an example.

2.1 Structure of Pallet Fixing Device The pallet fixing device 10 according to the present embodiment is detachably assembled to the support member 3B, that is, the vehicle body portion 2. That is, the pallet fixing device 10 is detachably assembled to the fork 4 and the vehicle body 2.

  As shown in FIG. 3, the pallet fixing device 10 includes an operation unit 11, a fixing unit 12, a first elastic member 20, and the like. The operation unit 11 is a member that is displaced by receiving an operation force from an operator when the pallet P is fixed to the fork 4 (claw portion 4A).

  The operation unit 11 is a rod-shaped member. The extending direction of the operation portion 11 coincides with the direction parallel to the hanger portion 4B, that is, the vertical direction in a state where the pallet fixing device 10 is assembled to the fork 4. Both ends of the operation unit 11 in the longitudinal direction are supported by the first support member 13 and the second support member 14 so as to be displaceable.

  That is, the first support member 13 that supports the upper end side of the operation unit 11 is provided with a through hole 13A through which the operation unit 11 passes. The second support member 14 that supports the lower end side of the operation unit 11 is provided with a hole 14A through which the operation unit 11 can protrude and retract.

  The fixing portion 12 fixes the pallet P to the fork 4 by contacting the pallet P. Specifically, the fixing portion 12 is an arm-like member extending in a direction parallel to the claw portion 4A of the fork 4 in a state where the pallet fixing device 10 is assembled to the fork 4.

  And the fixing | fixed part 12 is a pallet in the direction which the contact pressure of 4 A of claw parts and the insertion hole P1 increases in the state which contacted the internal peripheral surface opposite to the internal peripheral surface which the claw part 4A contacts among the insertion holes P1. Press P.

  Specifically, as shown in FIG. 2, the claw portion 4A comes into contact with the inner peripheral surface on the upper surface side. The fixed portion 12 receives an elastic force in a direction to increase the contact pressure with the pallet P from the first elastic member 20 in a state where the fixed portion 12 is in contact with the inner peripheral surface on the lower surface side.

  As shown in FIG. 4, the fixing portion 12 is provided on the front end side in the pressing direction of a rod-shaped pressing rod 15 extending in a direction parallel to the operation portion 11. The first elastic member 20 is a compression coil spring. A pressing rod 15 is inserted into the first elastic member 20.

  As shown in FIG. 5, a first engaging portion 16 that engages with one end in the axial direction of the first elastic member 20 (the lower end in the present embodiment) is provided on the fixing rod 12 side of the pressing rod 15. . For this reason, one end in the axial direction of the first elastic member 20 cannot be displaced from the position of the first engagement portion 16 toward the fixed portion 12. The first engaging portion 16 according to the present embodiment is a pin-shaped member that penetrates the pressing rod 15.

  A second engaging portion 17 that engages with the other end is provided on the other end (upper end in the present embodiment) in the axial direction of the first elastic member 20. The second engagement portion 17 is an arm-like member that protrudes from the operation portion 11 toward the pressing rod 15, and is displaced integrally with the operation portion 11.

  Specifically, the second engagement portion 17 has a through hole 17A through which the pressing rod 15 can pass, and one end side in the extending direction is fixed to the operation portion 11 by a fastening portion 17B such as a bolt. The first elastic member 20 is sandwiched between the first engaging portion 16 and the second engaging portion 17.

  The holding member 18 is a member that holds the first elastic member 20 in a compressed and deformed state when the fixing portion 12 and the pallet P are not in contact with each other. That is, the holding member 18 extends along the axial direction of the first elastic member 20. One end side in the longitudinal direction of the holding member 18 (the lower end side in FIG. 5) is engaged with the first engagement portion 16, and the other end side in the longitudinal direction (the upper end side in FIG. 5) is engaged with the second engagement portion 17. It is connected.

  A portion of the holding member 18 that engages with the first engagement portion 16 (hereinafter, referred to as a third engagement portion) 18 </ b> A is separated from the first engagement portion 16 from the side opposite to the first elastic member 20. Engage possible. That is, in a state where the third engagement portion 18 </ b> A and the first engagement portion 16 are engaged, the third engagement portion 18 </ b> A contacts the lower surface of the first engagement portion 16.

  In a state where the first engagement portion 16 is engaged (contacted) with the third engagement portion 18A, the dimension H1 from the first engagement portion 16 to the second engagement portion 17 is the first elastic member 20. The dimension is shorter than the natural length. For this reason, the 1st elastic member 20 is always maintained in the state compressed and deformed. Hereinafter, the elastic force exerted by the first elastic member 20 when the first engagement portion 16 is engaged with the third engagement portion 18A is referred to as an initial load.

  The first engaging portion 16 is third engaged on the second engaging portion 17 side of the holding member 18 from the third engaging portion 18A, that is, above the third engaging portion 18A of the holding member 18. An elongated hole-shaped guide portion 18B that guides the displacement of the first engagement portion 16 when displaced away from the portion 18A is provided.

The spring restricting mechanism 19 restricts the first elastic member 20 from being displaced in a direction in which the contact pressure between the fixed portion 12 and the pallet P decreases when the fixed portion 12 and the pallet P are in contact with each other.
That is, since the first elastic member 20 always presses the second engaging portion 17, the other end side in the axial direction of the first elastic member 20, that is, the upper end of the first elastic member 20 is connected to the second engaging portion 17. In contact. For this reason, the upper end position of the first elastic member 20 is determined by the position of the second engaging portion 17.

  Since the second engagement portion 17 is displaced integrally with the operation portion 11, the position of the second engagement portion 17, that is, the upper end position of the first elastic member 20 is determined by the position of the operation portion 11. That is, the upper end position of the first elastic member 20 can be restricted by restricting the displacement of the operation unit 11 when the first elastic member 20 is further compressed and deformed from the state where the initial load is exerted.

  The spring restricting mechanism 19 according to the present embodiment restricts the displacement of the operation unit 11 with respect to the first support member 13, so that the upper end position of the first elastic member 20, that is, the first elastic member 20. The first elastic member 20 is restricted from being displaced in a direction in which the position is maintained and the contact pressure decreases.

  As shown in FIG. 4, the spring regulating mechanism 19 according to the present embodiment includes a first support member 13, a plurality of recesses 11 </ b> A provided in the operation unit 11, and pins 19 </ b> A that are detachably fitted into the recesses 11 </ b> A. It is comprised.

  The pin 19A is engageable with the first support member 13 when fitted into the recess 11A. For this reason, when the pin 19 </ b> A is fitted in the recess 11 </ b> A, the operation unit 11 cannot be displaced with respect to the first support member 13. The state in which the pin 19A is fitted in the recess 11A is held by the second elastic member 19B shown in FIG.

  The third elastic member 20 </ b> A exhibits an elastic force that separates the fixing portion 12 from the pallet P. In the present embodiment, the fixing portion 12 is provided on the pressing rod 15, and the pressing rod 15 is the second engaging portion in a state where the first engaging portion 16 is engaged with the third engaging portion 18A. Accordingly, the third elastic member 20 </ b> A applies the above-described elastic force to the second engaging portion 17.

  The first support member 13 and the second support member 14 are fixed to a frame 21 that extends in parallel with the operation unit 11. An assembly portion 21 </ b> A is provided at the end in the longitudinal direction of the frame 21 and on the side opposite to the fixed portion 12. The assembly portion 21A has a through hole 21B through which the support member 3B can penetrate. A portion of the pallet fixing device 10 excluding the assembly portion 21A is also referred to as a device main body.

  The pallet fixing device 10, that is, the device main body, is assembled to the support member 3B, which is the assembly portion, via the assembly portion 21A. An engaged portion 21D is provided on the upper surface of the assembly portion 21A. The engaged portion 21D is a recess or a hole that can be engaged with the pin 3F.

  When the pin 3F is fitted in the recess 3D of the plate 3C and the pin 3F is engaged with the engaged portion 21D, the pallet fixing device 10 is restricted from moving in the horizontal direction. The sub-frame 22 is a strip-shaped member that connects the first support member 13 and the second support member 14, and is provided on the opposite side of the frame 21 with the operation unit 11 and the pressing rod 15 interposed therebetween.

  A leaf spring 23 is assembled and fixed to the holding member 18 side of the frame 21 as shown in FIG. The leaf spring 23 is bent into a “<” shape or a “he” shape so as to protrude toward the holding member 18. A sliding contact portion 18 </ b> C capable of sliding contact (hereinafter also referred to as sliding contact) with the leaf spring 23 is provided at a portion of the holding member 18 that faces the leaf spring 23.

  When the fixed portion 12 and the pallet P are not in contact with each other, the portion A where the slidable contact portion 18C and the leaf spring 23 come in contact with the bent portion 23A of the leaf spring 23 on the first support member 13 side. It is. As shown in FIGS. 6A and 6C, when the fixed portion 12 and the pallet P are in contact with each other, the portion B where the slidable contact portion 18C is in contact with the leaf spring 23 is in contact with the bent portion 23A. The second support member 14 side.

  Therefore, when the sliding contact portion 18C approaches the bent portion 23A while slidingly contacting the leaf spring 23, that is, when the holding member 18 is displaced toward the first support member 13, the holding member 18 moves the sliding contact portion 18C. The force of the direction which prevents a displacement is received from the leaf | plate spring 23 via this.

2.2 Pallet fixing device operation method (pallet fixing work)
The operator displaces the operation unit 11 downward while the pin 19A is removed from the recess 11A. At this time, the fixing portion 12 is displaced downward in conjunction with the operation portion 11 until the fixing portion 12 contacts the pallet P.

Next, the operator presses the operation unit 11 further downward, and inserts the pin 19A into the recess 11A at any one of the recesses 11A provided at a plurality of positions.
As a result, the upper end of the first elastic member 20 is displaced downward together with the operation portion 11, so that the first elastic member 20 is further compressed and deformed from the state where the initial load is exerted, and the compressed and deformed state is maintained. Is done. Therefore, the contact pressure between the fixed portion 12 and the pallet P is increased and the state is maintained, so that the pallet P is fixed to the fork 4.

3. Features of Pallet Fixing Device According to this Embodiment In this embodiment, the device main body, that is, the pallet fixing device 10 can be detachably assembled to the vehicle body portion 2 and the fork 4. That is, the pallet fixing device 10 according to the present embodiment is an independent member with respect to the vehicle body portion 2 and the fork 4. Therefore, only the fork 4 can be easily replaced.

The present embodiment is characterized in that a support member 3B to which the fork 4 is assembled is used as an assembly portion to which the pallet fixing device 10 is assembled.
Thereby, in this embodiment, an apparatus main body, ie, the pallet fixing apparatus 10, can be assembled | attached using the supporting member 3B which exists in the vehicle body part 2. FIG. Therefore, the pallet fixing device 10 according to the present embodiment can be easily assembled to an existing forklift vehicle.

  In the present embodiment, the assembly portion 21A (pallet fixing device 10) assembled to the support member 3B is characterized in that the displacement in the horizontal direction is regulated by a fork regulating mechanism. Accordingly, it is possible to regulate the displacement of the apparatus main body in the horizontal direction using an existing fork regulating mechanism without newly providing a regulating mechanism.

  The fork regulating mechanism according to the present embodiment is configured such that when the pin 3F is fitted into a through-hole-shaped recess 3D provided in the plate 3C, the pin 3F and the engaged portion 21D provided in the assembly portion 21A It is the structure which engages, It is characterized by the above-mentioned. Thereby, it can control reliably that the pallet fixing device 10 will be displaced to a horizontal direction.

  In the pallet fixing device 10 according to the present embodiment, since the pallet P can be fixed to the fork 4 using the elastic force exerted by the first elastic member 20, the pallet P can be stably fixed to the fork 4. Become.

  And if an operator operates the operation part 11 so that the amount of elastic deformation of the 1st elastic member 20 may become constant, since it will become possible to make contact pressure constant, the insertion height of the pallet P will be sufficient. Even if different, the pallet P can be stably fixed to the fork 4.

  That is, in the present embodiment, the contact surface pressure between the fixed portion 12 and the pallet P when the fixed portion 12 is fixed to the pallet P, that is, the force with which the fixed portion 12 presses the pallet P (hereinafter referred to as pallet pressing force). ) Is a size obtained by applying an initial load to the elastic force corresponding to the elastic deformation amount of the first elastic member 20 from when the fixed portion 12 contacts the pallet P.

  Therefore, for example, when the height dimension Hp of the insertion hole P1 of the pallet P is small (see FIG. 6B) and when the height dimension Hp of the insertion hole P1 of the pallet P is large (see FIG. 6C). In any case, if the amount of elastic deformation of the first elastic member 20 from when the fixed portion 12 contacts the pallet P is the same, the pallet pressing force is the same.

  That is, even if the height dimension Hp of the insertion hole P1 is different, if the operator operates the operation unit 11 so that the elastic deformation amount of the first elastic member 20 is constant, the pallet pressing force is constant. The size can be as follows.

  The spring restricting mechanism 19 according to the present embodiment is characterized in that the position of the first elastic member 20 is restricted by restricting the displacement of the operation unit 11. Thereby, in this embodiment, the operator can perform the fixing operation | work of the pallet fixing apparatus 10 easily.

  The spring restricting mechanism 19 according to the present embodiment is configured such that when the pin 19A is fitted into the recess 11A provided in the operation unit 11, the first support member 13 and the pin 19A are engaged to displace the operation unit 11. It is characterized by regulating. Thereby, it can control reliably that the 1st elastic member 20 is displaced to the direction where the contact pressure of the fixing | fixed part 12 and the pallet P reduces.

  In this embodiment, when the fixing | fixed part 12 and the pallet P are not contacting, it is provided with the holding member 18 which hold | maintains the state which compressed and deformed the 1st elastic member 20, Furthermore, the said holding member 18 is a longitudinal direction. A first engagement portion 16 has a third engagement portion 18A that can be detachably connected to the first engagement portion 16 from the side opposite to the first elastic member 20, and the other end in the longitudinal direction is the second engagement. It is connected to the portion 17 and is integrally displaced with the operation portion 11.

Thereby, in this embodiment, a large elastic force can be exerted on the first elastic member 20 without greatly operating the operation unit 11.
That is, the elastic force exerted by the first elastic member 20 increases as the elastic deformation amount of the first elastic member 20 increases. In this embodiment, since the initial load is generated even when the fixed portion 12 and the pallet P are not in contact with each other, the first elastic member has already been formed when the fixed portion 12 and the pallet P are in contact with each other. 20 exhibits an elastic force.

  Therefore, when the operation unit 11 is operated from the state where the fixing unit 12 and the pallet P are in contact with each other, the first elastic member 20 is further compressed and deformed from the already compressed state. Therefore, a large elastic force can be exerted on the first elastic member 20 without greatly operating the operation unit 11.

  In the present embodiment, when the holding member 18 is displaced toward the first support member 13, that is, when the operation unit 11 is displaced upward, the holding member 18 exerts a force in a direction that prevents the displacement via the sliding contact portion 18 </ b> C. It is characterized by receiving from the leaf spring 23. Thereby, when the pin 19A is removed from the concave portion 11A, it is possible to suppress the operation unit 11 from being rapidly displaced upward.

(Second Embodiment)
In the above-described embodiment, the pallet fixing device 10 is restricted from being displaced in the horizontal direction by engaging the pin 3F with the engaged portion 21D, but in this embodiment, the locking portion 21C shown in FIG. By locking the pallet fixing device 10 to the fork 4, the horizontal displacement of the pallet fixing device 10 is restricted.

That is, the pallet fixing device 10 according to the present embodiment is supported by the support member 3B, and is locked to the fork 4 by the locking portion 21C to restrict horizontal displacement.
The locking portion 21C according to the present embodiment holds the hanger portion 4B of the fork 4 from the horizontal direction in cooperation with the frame 21, thereby locking the pallet fixing device 10 to the fork 4 and the pallet fixing device 10. And fork 4 are integrated.

(Third embodiment)
In this embodiment, as shown in FIG. 8, the pallet fixing device 10 can be assembled to the sheath fork 24. And the assembly | attachment part 21A which concerns on this embodiment is comprised by the L-shaped attachment angle provided in the flame | frame 21. As shown in FIG. The assembly portion 21A and the sheath fork 24 are assembled and fixed by mechanical fastening means such as screws.

  The sheath fork 24 has a rectangular tube-shaped sheath portion 24A into which the claw portion 4A of the fork 4 is inserted, a stopper portion (not shown) that prevents the sheath fork 24 from coming off the fork 4, and the like. ing.

  In this embodiment, since the pallet fixing device 10 is assembled to the fork 4 via the sheath fork 24, the claw portion 4A and the sheath portion 24A constitute the assembled portion described in the claims. Is done.

  In the present embodiment, as shown in FIG. 8, a connecting member 25 that connects the pair of left and right pallet fixing devices 10 in the horizontal direction is provided. The connecting member 25 connects the frames 21 of the pallet fixing devices 10.

  Accordingly, the pair of left and right pallet fixing devices 10 and the sheath fork 24 can be handled as one unit, and the pair of pallet fixing devices 10 can be firmly fixed to the vehicle body portion 2 and the fork 4 during a cargo handling operation. Can do.

(Fourth embodiment)
In the above-described embodiment, the shaft system is such that the fork 4 is assembled to the support member 3B by the support member 3B penetrating the assembly hole 4C of the fork 4. However, in this embodiment, the fork 4 is attached to the support member 3B. The present invention is applied to a hanging hook system.

  That is, as shown to Fig.9 (a), the support member 3B is comprised with the strip | belt-plate-shaped member provided with several recessed part 3D. As shown in FIG. 9B, the hanger portion 4B of the fork 4 is provided with a first hook 4F and a second hook 4G.

  The first hook 4F is a hook for suspending the fork 4 from the support member 3B, and is provided on the upper end side of the hanger portion 4B. The second hook 4G is a hook that is locked to the second support member 3E provided on the carriage 3A, and is provided on the lower end side of the hanger portion 4B.

  Note that most of the load acting on the fork 4 is received by the support member 3B via the first hook 4F. The second hook 4G suppresses the second hook 4G from detaching the first hook 4F from the support member 3B.

  The pin 3F of the fork regulating mechanism that regulates the horizontal displacement of the fork 4 is assembled to the fork 4 so as to be displaceable with respect to the fork 4. In the method of assembling the fork 4 to the support member 3B by the hook method, the horizontal displacement of the pallet fixing device 10 is regulated using the recess 3D provided in the support member 3B.

  That is, as shown in FIG. 9A, the pin 3 </ b> F that is detachably fitted into the recess 3 </ b> D is assembled to the pallet fixing device 10 so as to be displaceable relative to the pallet fixing device 10. The assembly structure of the pin 3F to the pallet fixing device 10 is the same structure as the assembly structure of the pin 3F to the fork 4.

(Fifth embodiment)
As shown in FIG. 10, in this embodiment, in the pallet fixing device 10 according to the first embodiment, a pair of left and right pallet fixing devices 10 are connected by a connecting member 25 as in the third embodiment. .

  In the pallet fixing device 10 according to the second embodiment and the fourth embodiment, it is natural that the pair of left and right pallet fixing devices 10 may be connected by the connecting member 25 as in the present embodiment. .

(Other embodiments)
In the above-described embodiment, the present invention is applied to a reach type forklift vehicle. However, the present invention is not limited to this, and the present invention can also be applied to a counterweight type forklift vehicle.

  In the third embodiment, the pallet fixing device 10 is indirectly assembled to the fork 4 via the sheath fork 24 or the like, but the present invention is not limited to this, and the assembly portion is attached to the fork 4. The pallet fixing device 10 may be installed directly on the fork 4.

  In the above-described embodiment, the pallet fixing device 10 is detachably assembled to the carriage 3A such as the fork 4 or the support member 3B. However, the present invention is not limited to this. a) Even if the pallet fixing device 10 is detachably assembled to the vehicle body 2, or (b) the pallet fixing device 10 is detachably assembled to both the fork 4 and the vehicle body 2. Good.

  In the pallet fixing device 10 according to the above-described embodiment, the pallet P is fixed to the fork 4 using the elastic force exerted by the first elastic member 20, but the present invention is not limited to this. Instead, for example, a method of fixing the pallet P to the fork 4 using the weight of the fixing portion 12 and the pressing rod 15 may be used.

  Although the 1st elastic member 20 which concerns on the above-mentioned embodiment was a compression coil spring, this invention is not limited to this, For example, the 1st elastic member 20 is a torsion coil spring, a disc spring, rubber | gum, etc. May be configured.

Although the operation unit 11 according to the above-described embodiment is a rod-shaped rod, the present invention is not limited to this, and may be, for example, an arm-shaped handle that rotates or swings.
The spring restricting mechanism 19 according to the above-described embodiment restricts the position of the first elastic member 20 by restricting the displacement of the operation unit 11, but the present invention is not limited to this, and the first elastic member The structure which controls the upper end position of the member 20 directly, or the structure which controls the 2nd engaging part 17 may be sufficient.

  The spring restricting mechanism 19 according to the above-described embodiment is configured to restrict the position of the first elastic member 20 to any one of a plurality of predetermined positions, but the present invention is limited to this. Instead, the configuration may be such that the position of the first elastic member 20 is regulated steplessly.

  Although the forklift according to the above-described embodiment uses an electric motor as a power source, the present invention is not limited to this, and the present invention is a forklift using a heat engine such as an internal combustion engine as a power source. Is also applicable.

  In the above-described embodiment, the present invention is applied to the forklift in which the two pallet fixing devices 10 are arranged on the left and right, but the application of the present invention is not limited to this. That is, for example, the present invention can be applied to a forklift in which one pallet fixing device 10 is disposed in the center in the left-right direction, or a forklift in which three or more pallet fixing devices 10 are disposed in the left-right direction.

  In the above-described embodiment, the pallet fixing device 10 is assembled using the existing fork support member, but the present invention is not limited to this. That is, for example, a process of providing a fastening portion such as a bolt hole in the fork 4 or the vehicle body portion 2 may be performed, and the pallet fixing device 10 according to the present invention may be assembled using the fastening portion as an assembly portion.

  In addition, the present invention enables the pallet fixing device 10 to be detachably assembled independently of both the vehicle body portion 2 and the fork 4. It is not limited to the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Forklift 2 ... Car body part 3 ... Cargo handling part 3A ... Carriage 3B ... Support member 3C ... Plate 3D ... Recess 3F ... Pin 3E ... Support member 4 ... Fork 4A ... Claw part 4B ... Hanger part 4D ... Supported part 4C ... Set Attached hole 4E ... engaged part 4F ... first hook 4G ... second hook 10 ... pallet fixing device 11 ... operation part 11A ... recessed part 12 ... fixing part 13 ... first support member 13A ... through hole 14 ... second support member 14A ... Hole 15 ... Press rod 16 ... First engagement portion 17 ... Second engagement portion 17A ... Through hole 17B ... Fastening portion 18 ... Holding member 18A ... Third engagement portion 18B ... Guide portion 18C ... Sliding contact portion 19 ... Spring restricting mechanism 19A ... Pin 19B ... Second elastic member 20 ... First elastic member 20A ... Third elastic member 21 ... Frame 21A ... Assembly part 21B ... Through hole 1D ... engaged portion 21C ... locking portion 22 ... sub-frame 23A ... bent portion 24 ... sheath fork 24A ... sheath portion 25 ... connecting member P ... Palette

Claims (7)

In the pallet fixing device for fixing the pallet supported by the fork of the forklift vehicle to the fork,
At least when the pallet is fixed to the fork, an operation unit operated by an operator, and the pallet is fixed to the fork in contact with the pallet and operates in conjunction with the operation of the operation unit. An apparatus body having a fixing part;
Only one assembling part for detachably assembling the apparatus main body with respect to the vehicle body, and only one assembly assembled to the assembled part provided on the upper end side of the fork in the vehicle body With an appendage,
In a state where the device main body is assembled to the vehicle body only through the one assembling portion and the pallet is not fixed to the fork, the fixing portion is positioned at the lower end of the device main body. And the pallet fixing device is located above the lower end of the fork.   The pallet fixing device according to claim 1, wherein the attached portion is a fork support member to which the fork is assembled, and is a fork support member provided on the vehicle body. The vehicle body has a fork restricting mechanism for restricting the fork assembled to the assembled part from being displaced in the horizontal direction,
The pallet fixing device according to claim 2, wherein a displacement in a horizontal direction of the assembly portion assembled to the assembly portion is regulated by the fork regulating mechanism. The fork regulating mechanism is
A horizontally extending member provided with a plurality of recesses, and a pin that is detachably fitted into the recess, and has a pin that can be engaged with the fork when fitted into the recess,
The pallet fixing device according to claim 3, wherein the assembly portion is provided with an engaged portion that can be engaged with the pin when the pin is fitted into the recess. The device main body is provided with a locking portion for locking the device main body to the fork,
3. The pallet fixing device according to claim 2, wherein a displacement of the device main body in a horizontal direction is restricted by the locking portion in a state where the device main body is supported by the assembled portion. In the pallet fixing device for fixing the pallet supported by the fork of the forklift vehicle to the fork,
An apparatus main body having an operation part operated by an operator at least when the pallet is fixed to the fork, and a fixing part that fixes the pallet to the fork and operates in conjunction with the operation of the operation part. When,
A pallet fixing device comprising: an assembly portion for detachably assembling the device main body with respect to the fork, the assembly portion being assembled via a sheath fork attached to the fork.   The pallet fixing device according to claim 1, further comprising a connecting member that connects a plurality of the apparatus main bodies in a horizontal direction.

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