JP6002001B2 - Lifting platform - Google Patents

Description

  The present invention relates to a lifting base for mounting a large container such as a drum can attached to a fork of a forklift.

A lifting platform for a forklift has a sheath body, and a forklift fork is inserted into the sheath body to be used for lifting a container. There was a risk of falling off the fork.
Therefore, the applicant can lock the fork securely to the sheath body by the wedge effect only by inserting the fork into the sheath body and raising the fork, and automatically locking the fork by lowering the fork and grounding the lifting platform. Previously, a lifting platform that can release the state has been proposed (Patent Document 1).

  As shown in FIG. 14, the lifting platform (1 ′) is provided with locking means (5 ′) on the lower side of the opening side of the sheath body (2 ′) for inserting and extracting the fork (100). The locking means (5 ′) includes a pair of bases (51 ′) extending downward from both sides of the sheath body (2 ′), and can swing within a vertical plane between the bases (51 ′). A grounding lever (8 ') is arranged. The grounding lever (8 ′) includes a roller (6 ′) that interlocks with the rotation of the grounding lever (8 ′), and the roller (6 ′) is located below the fork insertion space between the bases (51 ′). It can be moved back and forth along a guide surface (53 ') that is arranged and rises toward the fork extraction side.

  However, when the lifting platform (1 ′) is in the grounded state, the roller (6 ′) is pulled back by the rotation of the grounding lever (8 ′) and lowered to the standby position, and the fork is inserted into and extracted from the sheath (2 ′). However, when the lifting platform (1 ') is raised, the roller (6') is raised along the guide surface (53 ') by the rotation of the grounding lever (8'), and the fork (100 ' ) Push up the bottom surface to lock.

A strut (3 ') is erected on the distal end side of the sheath (2'), and a clamp part (4 ') for lifting the container (200') is attached to the upper end of the strut (3 '). A contact portion (12 ′) for receiving the body portion of the container (200 ′) is provided between the sheath portions (2 ′) at the tip of the sheath portion (2 ′).
To lift the container (200 ′), hold the upper edge of the container (200 ′) with the clamp part (4 ′) and place the contact part (12 ′) against the body of the can so that the container (200 ′) I try to keep a straight posture.

Japanese Patent No. 3058592

Since the locking means (5 ′) protrudes downward from the opening end of the sheath body (2 ′), in order to keep the sheath body (2 ′) horizontal, the distal end side of the sheath body (2 ′) It is necessary to project the auxiliary leg (14 ') downward. As a result, the sheath body (2 ′) is formed at a position away from the floor surface.
Further, in order to lock the lifting platform (1 ′) to the fork (100) and maintain the locked state, the lifting platform (1 ′) is lifted and one end of the grounding lever (8 ′) as shown in FIG. The roller (6 ′) needs to be brought into contact with the lower surface of the fork (100) by rotating it so that it protrudes greatly from the base (51 ′).

Therefore, the lifting platform (1 ′) must be lifted from the floor surface to a height higher than the sum of the height of the locking means (5 ′) and the downward protrusion of the grounding lever (8 ′).
For this reason, as shown in FIG. 14, the support column (3 ′) is placed in the container so that the clamp part (4 ′) reaches the upper edge of the container (200 ′) with the lifting base (1 ′) lifted. It must be shortened to about half the height of (200 ').

  Since the column (3 ') must be shortened, when the container (200') is gripped by the clamp part (4 '), the contact part (12') is placed in the body of the container (200 '). (In FIG. 14, it is in contact with the upper edge of the container (200 ′) L ′) and a reaction force F ′ is applied to the barrel. The body part of the container (200 ′) is more likely to be recessed than the vicinity of the upper and lower edges closed by the upper and lower lids, so the body part is deformed by the reaction force F ′ from the contact part (12 ′). May end up.

  In order to reduce the reaction force acting on the container body from the contact part (12 ') when lifting the container (200'), the distance L 'from the clamp part (4') to the contact part (12 ') is set. It is necessary to reduce the reaction force F ′ which is long and inversely proportional to the distance. However, as described above, the locking means (5 ′) and the auxiliary leg (14 ′) protrude below the sheath body (2 ′), and the clamp part (4 ′) is located above the container (200 ′). When approaching the edge, the grounding lever (8 ′) interferes with the floor surface and the lock is released, so the structure in which the column (3 ′) is simply elongated is the lifting platform (1 ′) of Patent Document 1. ) Cannot be adopted.

  As another problem, the roller (6 ') pushes up the lower surface of the fork (100) to lock it, but the tip of the fork (100) has a taper on the lower surface side. When this taper portion contacts the roller (6 ′), the locking effect is not sufficient.

  An object of the present invention is to provide a lifting platform that can hold a container while keeping the sheath body as low as possible and can prevent the sheath from falling off the fork.

The lifting platform (1) according to the present invention is:
A sheath (2) having a fork insertion space for receiving a fork (100) of a forklift, a clamp part (4) disposed above the sheath (2) and gripping an upper edge of the container (200), and a container ( 200) has a contact part (12) for supporting the body part, and the fork (100) is inserted into the sheath body (2), the upper edge of the container is gripped by the clamp part (4), and the fork ( In the lifting platform (1) for lifting the container by raising 100)
The lifting platform (1) includes a locking means (5) for the fork (100) inserted into the sheath body (2) on the fork withdrawal side of the sheath body (2),
The locking means (5)
A guide surface (53) disposed above the fork insertion space and inclined so that the fork withdrawal side is low;
A roller (6) capable of moving along the guide surface (53) and pushing down the upper surface of the fork (100);
One end is connected to the roller (6), the other end protrudes downward so that it can come into contact with the floor, and the middle part is supported so as to be rotatable in a vertical plane, and the roller (6) is pushed in the downward direction. A grounding lever (8) biasing in the direction,
With
At the raised position of the lifting platform (1), the grounding lever (8) rotates and the roller (6) advances in the wedge space between the upper surface of the fork (100) and the guide surface (53). Then the upper surface of the fork (100) is pushed down and locked, and when the lifting base (1) is lowered and the lower end of the grounding lever (8) is grounded, the grounding lever (8) rotates in the opposite direction. The roller (6) connected to the grounding lever (8) rises along the guide surface (53) and releases the lock on the upper surface of the fork (100).

When the roller (6) is lifted, the upper surface of the horizontal and flat fork (100) is pushed down to lock the fork (100), so the locking effect is lower than in the conventional case where the lower surface of the fork (100) is pushed up. Rise.
In particular, even in a state where the lock with the fork (100) is not sufficient, as described in the embodiments described later, vibration is applied to the lifting platform (1), the container is gripped or tilted forward due to its own weight, etc. When the lifting platform (1) moves relative to the fork (100) in a relative direction, the roller (6) enters the wedge space formed by the guide surface (53) and the upper surface of the fork (100). The wedge action is strengthened and a sufficient locked state can be obtained.

  Further, according to the present invention, the lifting platform (1) does not protrude downward from the sheath body (2) when placed on the floor surface. Accordingly, the support column can be lengthened to form the clamp part (4) at a high position from the sheath body (2), and the distance L between the clamp part (4) and the contact part (12) can be taken large. When the upper edge of the container (200) is gripped by the part (4), the contact part (12) can be brought into contact with the vicinity of the lower edge of the container (200). Therefore, the reaction force F applied from the contact portion (12) to the barrel portion of the container (200) can be reduced, and the container (200) can be transported by a forklift while suppressing deformation of the container (200). it can. Further, since the container (200) is more difficult to deform near the upper edge and the lower edge where the upper cover and the lower cover are closed than the center of the body part, the container (200) can be further increased by taking a larger distance L. ) Deformation and the like can be suppressed.

FIG. 1 is a right side view of the lifting platform at the time of grounding. FIG. 2 is a right side view of the lifting platform when the container is lifted. FIG. 3 is a plan view of the lifting platform. FIG. 4 is a cross-sectional view of the locking means at the time of grounding, taken along line 3A-A in FIG. FIG. 5 is an enlarged view of a circled portion α in FIG. FIG. 6 is a cross-sectional view of the locking means when the container is lifted, broken along the line AA in FIG. FIG. 7 is an exploded perspective view of the locking means when the container is lifted. FIG. 8 is a cross-sectional view of the locking means showing a state where the locking action is exerted from the state where the locking is insufficient. FIG. 9 is an explanatory diagram of the locking operation when the lifting platform moves in the direction of falling off the fork with insufficient locking. FIG. 10 is a cross-sectional view of the locking means at the time of grounding, showing another embodiment of the means for biasing the grounding lever. FIG. 11 is a cross-sectional view of the locking means in the second embodiment of FIG. 10 when the container is lifted. FIG. 12 is a cross-sectional view of a lifting stand that is tilted forward by a fulcrum member and locked. FIG. 13 is a cross-sectional view of a lifting stand that is locked forwardly by a fulcrum member. FIG. 14 is a right side view of a conventional example (Patent Document 1) previously proposed by the applicant.

As shown in Fig. 1 and Fig. 3, the lifting platform (1) connects the front and back of two sheath bodies (2) and (2) arranged in parallel with two connecting rods (10) and (11). A support column (3) is erected in the center of the connecting rod (10). Here, the front side of the lifting base (1) is the container side into which the fork (100) of the forklift is inserted into the sheath body (2), and the rear side is the forklift side that pulls out the fork (100) from the sheath body (2). FIG. 1 is a view of the lifting platform (1) as viewed from the right side.
In the vicinity of the upper end of the support column (3), a clamp part (4) that holds the upper edge of the container (200) is provided. The strut (3) is reinforced by a reinforcing rod (13) provided obliquely between its upper end and the rear side of each sheath (2).

  In the illustrated embodiment, the clamp portion (4) has an upper nail and a lower nail, and lifts the lower nail against the upper edge of the container so that the upper nail approaches the lower nail by the weight of the container. It is a structure which rotates and grips the can edge with both claws. The clamp part (4) has various configurations such as one that can screw the lower nail or upper nail and grasp the can edge with the upper and lower claws, and one that can grasp the can edge of the container so that it can be opened and closed. Can do.

  The front ends of the two sheath bodies (2) and (2) are provided with contact portions (12) and (12) which are brought into contact with the trunk portion of the suspended container (200) and prevent the container from tilting.

  Locking means (5) for the fork (100) is provided at the rear of one or both sheath bodies (2). The locking means (5) has a middle portion pivoted between a box-shaped base (51) integrally connected to the sheath body (2) and having an open front and rear surface, and side plates (52) and (52) of the base (51). A grounding lever (8) that is supported and rotated in a vertical plane along the front-rear direction, a guide surface (53) that is formed above the fork insertion space in the base (51) and has a low rear slope, and the guide surface ( 53) The roller (6) moving up, the connecting rod (7) pivotally connecting the end of the grounding lever (8) and the roller (6), and the roller connected to the grounding lever (8) And a means (9) for urging the grounding lever (8) to move in the direction of travel. The rear plate of the base (51) is provided with an opening (56) for inserting and extracting a fork, and a receiving plate (55) is projected forward from the lower portion of the opening (56). The guide surface (53) is located above the opening (56).

  The grounding lever (8) connects a pair of lever plates (81) and (81) of the same shape with a connecting plate (82) and a connecting shaft (83). ) Is rotatably supported on the base (51) by a shaft (84) installed between them. A rotation stop piece (86) is attached to one end of the shaft (84), and the rotation stop piece is bolted to the side plate (52). The grounding lever (8) is pivotally biased by the biasing means (9). When the lifting base (1) is in the raised position as shown in FIGS. 2 and 6, the upper end of the grounding lever (8) is the base (51 ) Between the side plates (52) and (52), and the lower end protrudes below the base (51).

  In the embodiment, the guide surface (53) extends over the both side plates (52) and (52) of the base (51) above the fork insertion space, and the guide plate is inclined so that the rear is inclined at an inclination angle of about 10 degrees. Deploy and form. Support plates (54) for receiving the ends of the following rollers (6) are fixed to the inner surfaces of the side plates (52) and (52) so as to face each other. The support plate (54) is inclined downwardly more than the guide surface (53) in parallel with the guide surface (53) or toward the rear with respect to the guide surface (53), thereby facilitating the transition of the rollers.

  The roller (6) is knurled on the roller part (62) that comes into contact with the fork, both ends of the roller part (62) are smooth surfaces, and the smooth surface end parts are respectively placed on the support plates (54) (54). It is supported. A small-diameter shaft (61) protrudes from both end faces of the roller (6), and one end of the connecting rod (7) is freely fitted.

  The other end of each connecting rod (7) is freely fitted to a connecting shaft (83) projecting from the tip of the grounding lever plate (81) (81) so that the grounding lever (8) and the roller (6) are connected. It is connected.

  In the embodiment shown in FIGS. 1 to 7, the urging means (9) includes a projecting shaft (57) projecting from the center of the rod (85) disposed at the tip of the grounding lever (8) and the upper surface of the base (51). A spring (91) is stretched between and the grounding lever (8) is moved downward along the guide surface (53) by moving the roller (6), that is, the lifting base (1) from the right side. It is energized in the clockwise direction when looking at. With the lifting platform (1) placed on the floor (GL) (Figs. 1 and 4), the lever (8) is pushed against the floor (GL) against the biasing force of the spring (91). Since it rotates counterclockwise and pulls back the roller (6) through the connecting rod (7), the roller (6) rises along the guide surface (53) and the opening (56) of the base (51) The fork can be inserted and removed freely.

  The strut (3) can secure a length L in which the clamp part (4) faces the upper edge of the container (200) and the contact part (12) faces the lower edge of the container. More specifically, the length L is at the maximum under the clamp (4) with the lifting platform (1) fully locking the fork (100) and separated from the floor (GL) with a slight clearance. The difference between the position where the nail can be hooked on the upper edge of the container (200) and the contact portion (12) can be set.

  Regarding the lifting platform (1) having the above-described configuration, the lock to the fork (100), the transportation of the container (200) and the unlocking operation will be described.

  In the state where the lifting platform (1) is placed on the floor (GL), the lever (8) is pushed against the floor and rotated counterclockwise as shown in FIG. Since the roller (6) ascends along the guide surface (53) via 7), the opening (56) of the base (51) is largely released, and the fork can be freely inserted and extracted.

  In this state, the fork (100) is inserted into the sheath body (2) from the opening (56), and the fork (100) is raised. In the state where the fork (100) is inserted into the sheath body (2), the roller (6) is still pulled by the lever (8) and rises along the support plate (54). As shown in FIG. 5, which is an enlarged view of FIG. 5, there is a gap (W1) between the roller (6) and the fork (100).

  When the fork (100) is raised, the lifting platform (1) also rises, releasing the pressure from the floor (GL) against the projecting lower end of the lever (8) and the biasing force of the spring (91) As a result, the lever (8) rotates clockwise as shown in FIG. As a result, the roller (6) is pushed to the lower side along the guide surface (53), and the roller (6) is on the upper surface of the fork (100), and lowers the upper surface of the fork (100). That is, the roller (6) is pushed into a wedge-shaped space formed between the guide surface (53) and the top surface of the fork to lock the fork (100).

  In this state, when the fork (100) is raised until the upper edge of the container is gripped by the lower and upper claws of the clamp part (4) (FIGS. 2 and 6), the container ( 200) is gripped, the container (200) is also raised, and the contact part (12) comes into contact with the body part of the container (200).

  At this time, as shown in FIG. 2, when the container (200) is gripped by the clamp part (4), the clamp part (4) is lowered, so that the position where the contact part (12) supports the container (200) is relatively Although it is shifted upward, the contact part (12) still supports the lower part of the container (200), and the length L between the clamp part (4) and the contact part (12) is the conventional length L ′. Can be larger. Therefore, the reaction force F applied to the container (200) is reduced in inverse proportion to the increase in the distance L, and deformation of the container (200) can be suppressed. Further, the container (200) is more difficult to deform near the upper edge and near the lower edge that are closed by the upper lid and the lower lid than at the center of the trunk portion. Can be suppressed.

  In this state, the clamp (4) holds the upper edge of the container (200) and raises the lifting base (1) to lift the container (200) and carry it to a predetermined position.

  After transporting the container (200), when the lifting platform (1) is lowered, the bottom of the container (200) hits the floor surface (GL), and the clamp part (4) releases the grip of the container (200).

  When the fork (100) is further lowered, the grounding lever (8) hits the floor (GL) immediately before the lifting platform (1) contacts the ground, and the spring (91) is biased by the weight of the lifting platform (1). The grounding lever (8) rotates counterclockwise, pulling the roller (6) to the ascending side of the guide surface (53) via the connecting rod (7). As a result, as shown in the enlarged view of FIG. 4, the roller (6) is separated from the fork (100), the lock of the fork (100) is released, and the forklift is moved backward to remove the fork (100) from the sheath body ( 2) can be removed.

  The fork (100) is inserted into the lifting base (1) and the fork (100) is simply lifted, so that the lifting base (1) locks the fork (100). However, when the fork (100) moves in the direction in which the fork (100) is pulled out, the roller (6) rolls in a direction to slide down along the guide surface (53) due to friction with the fork (100). Since the roller (6) is pressed against the fork (100), the wedge effect is further enhanced and the fork (100) can be reliably prevented from being pulled out.

  Further, as shown in FIG. 4, when the fork (100) is inserted into the sheath body (2) with the clamp part (4) not holding the container and the fork (100) is raised, the grounding lever ( The roller (6) is pressed against the upper surface of the fork (100) by the dead weight of the grounding lever (8) when the 8) comes off the floor (GL) and the clockwise pulling force by the biasing means (9). The lock is performed.

  For example, as shown in FIG. 8 (the biasing means (9) is not shown), the weight of the lifting base (1) prevents the grounding lever (8) from rotating clockwise, and the fork (100 ) Even if the entire upper surface of the sheath body (2) remains in contact with the upper inner surface of the sheath body (2), as shown by the arrow B in FIG. 8, the sheath body (2) moves away from the fork (100). The roller (6) rolls counterclockwise while rubbing on the fork (100) (arrow C), and presses the fork (100) downward, so that the gap between the guide surface (53) and the top surface of the fork Since it enters the formed wedge space (arrow D), it exerts a locking action on the fork (100). Accordingly, the grounding lever (8) is also rotated in the direction of arrow E so as to protrude downward. FIG. 9 shows a locked state (partial cross section) in a state in which the sheath body (2) is moved in a direction of coming out of the fork (100). Referring to FIG. 9, there is a gap (W2) between the tip of the sheath body (2) and the tip of the fork (100), but the tip of the fork (100) hits the upper surface of the sheath body (2). At the same time, the lower surface hits the receiving plate (55) of the sheath body (2), and is further locked down by the roller (6) to be locked to the lifting platform (1).

  Similarly, as shown in FIG. 8, when the sheath body (2) moves relative to the fork in a direction of falling off from the fork, such as when the forklift suddenly stops or suddenly starts, as shown in FIG. Due to the impact, the lifting platform (1) tilts forward (arrow F in FIG. 8). By this forward tilt, the lower surface of the fork (100) is tilted in a direction to be pressed against the receiving plate (55) of the sheath body (2), and the fork (100) is separated from the upper inner surface on the opening side of the sheath body (2). Since the roller (6) enters the wedge space formed by the guide surface (53) and the upper surface of the fork (arrow D), the wedge action is strengthened and the lock action can be exerted. Along with this, the grounding lever (8) also rotates in the direction of arrow E so as to protrude downward.

  In addition, when the container (200) is gripped by the clamp part (4) in a state where the lock is insufficient, the combined center of gravity G1 of the lifting platform (1) and the container (200) is the weight of the container (200). However, since the fork (100) comes forward (see FIG. 2), when the fork (100) is raised, the lifting base (1) tilts forward (arrow F in FIG. 8). By this forward tilt, the lower surface of the fork (100) is tilted in a direction to be pressed against the receiving plate (55) of the sheath body (2), and the fork (100) is separated from the upper inner surface on the opening side of the sheath body (2). Since the roller (6) enters the wedge space formed by the guide surface (53) and the upper surface of the fork (arrow D), the wedge action is strengthened and the lock action can be exerted. Along with this, the grounding lever (8) also rotates in the direction of arrow E so as to protrude downward.

  Similarly, when the fork (100) is vibrated, the fork (100) moves up and down inside the sheath body (2), and the top surface of the fork (100) is separated from the upper inner surface of the sheath body (2). Since the roller (6) enters the wedge space (arrow D), the wedge action is strengthened and the lock action can be exerted. Along with this, the grounding lever (8) also rotates in the direction of arrow E so as to protrude downward.

  Furthermore, even if the fork (100) is lifted with the fork (100) not fully inserted into the sheath body (2), the center of gravity G of the lifting platform (1) is in the vicinity of the column (3). Since the fork (100) comes to the front of the fork (100), when the fork (100) is raised, the lifting base (1) is tilted forward due to the bias of the center of gravity G. For this reason, since the lower surface of the fork (100) is inclined in a direction in which it is pressed against the receiving plate (55) of the sheath body (2), the roller (6) moves to the wedge space formed by the guide surface (53) and the upper surface of the fork. When entering (arrow D in FIG. 8), the wedge action is strengthened and the locking action can be exhibited. Accordingly, the grounding lever (8) is also rotated in the direction of arrow E in FIG. 8 so as to protrude downward.

  In the above embodiment, the spring (9) for biasing the roller (6) is connected to the lever (8), but it is needless to say that the spring (9) can be directly connected to the roller (6).

<Different Examples>
10 and 11 show another embodiment of the means for urging and rotating the grounding lever (8) of the lifting base (1). The biasing means (9a) is provided with a heavy balance weight (92) on the connecting plate (82) instead of the spring (91) of the previous embodiment.
When the lifting platform (1) is raised and the grounding lever (8) is separated from the floor (GL) (FIG. 11), the grounding lever (8) is rotated clockwise by the rotational moment of the balance weight (92). The roller (6) moves to the wedge space along the guide surface (53) and pushes down the upper surface of the fork to lock the fork.

  When the lifting platform (1) is lowered and the grounding lever (8) comes into contact with the floor (GL) again (Fig. 10), the grounding lever (8) is counterclockwise against the moment due to the balance weight (92). Rotate and move the roller (6) in the upward direction, releasing the lock on the top surface of the fork, allowing the fork to be removed or inserted.

<Further different embodiments>
In any of the above-described embodiments, the ground lever (8) is provided with means for turning and urging, but the present invention can also be realized by a configuration not provided with means for turning and biasing. In this case, in a no-load state, the grounding lever (8) has a weight balance that pushes the roller (6) to the lower side along the guide surface (53).

  For example, when the fork (100) is inserted into the sheath body (2) and the fork (100) is raised with respect to the lifting base (1) in a state where the container (200) is not grasped, the lifting base (1) By adopting a forward tilting configuration, there is an advantage that means for rotating and energizing the grounding lever (8) can be omitted. When the lifting platform (1) is tilted forward, the lower surface of the fork (100) is tilted in a direction to be pressed against the receiving plate (55) of the sheath body (2) as shown by the arrow F in FIG. ), The fork (100) is separated from the upper inner surface of the opening side, and the roller (6) enters the wedge space formed by the guide surface (53) and the upper surface of the fork (arrow D). It can be demonstrated.

  In order to tilt the lifting platform (1) forward, a configuration in which the positional relationship between the gravity center G of the lifting platform (1) and the fork (100) can be exemplified. Specifically, the weight (such as a weight) is placed on the tip of the sheath (2) of the lifting base (1) to move the center of gravity G of the lifting base (1) forward, and the total length of the sheath (2) is increased. Thus, the insertion length of the fork (100) is set so that the center of gravity G of the lifting base (1) is positioned near or in front of the front end of the fork (100). And so on.

  Further, as shown in the partial cross-sectional views of FIGS. 12 and 13, the inner upper surface of the sheath body (2) can be configured such that the tip side is higher than the opening (56) side. In the illustrated embodiment, a plate-like fulcrum member (94) is attached to the inner upper surface on the opening side of the sheath body (2). The fulcrum member (94) has a length in the vicinity of the center of gravity of the lifting base (1) or to the rear of the center of gravity G. In the figure, the fulcrum member (94) has a length of about ３ from the rear opening side. Further, the thickness of the fulcrum member (94) is such that the fork (100) is inserted into the sheath body (2), the top surface on the front end side of the fork (100) hits the inner top surface on the front end side of the sheath body (2), The bottom surface of the base end side of 100) hits the bottom surface of the opening side of the sheath body (2), and further, the tip of the fulcrum member (94) serves as a fulcrum so that it can hit the top surface of the fork (100). desirable.

  In the lifting platform (1) configured as described above, as shown in FIG. 12, the fork (100) is inserted between the fulcrum member (94) and the inner lower surface of the sheath body (2).

  When the fork (100) is raised, the upper surface of the fork (100) comes into contact with the fulcrum member (94). As shown in FIG. 12, the center of gravity G of the lifting platform (1) is located in front of the fulcrum member (94). Therefore, when the fork (100) is further lifted from this state, the lifting platform (1) As shown in FIG. 13, the tip of the fulcrum member (94) is tilted forward as indicated by the arrow H in the figure with the fulcrum as the fulcrum. As a result, the upper surface on the distal end side of the fork (100) hits the inner upper surface on the distal end side of the sheath body (2), and the lower surface on the proximal end side of the fork (100) hits the lower surface on the opening side of the sheath body (2).

  Due to the forward tilt of the lifting platform (1), the fork (100) is separated from the upper inner surface on the opening side of the sheath body (2), the grounding lever (8) rotates in the direction of arrow I, and the roller (6) is guided to the guide surface (53 ) And the wedge space formed by the upper surface of the fork, the wedge action is strengthened and the lock action can be exerted.

  Note that the fulcrum member (94) is not limited to a plate-like body, and may be a ridge, or may be composed of one or a plurality of protrusions.

  Moreover, it can also be set as the structure which comprises both the fulcrum member (94) and the means to urge the rotation of the grounding lever (8).

  The present invention is not limited to the configuration of the above-described embodiment, and various modifications can be made within the scope of the claims.

  For example, in any embodiment, the number of sheath bodies (2) is not limited to two, but may be one or a plurality of three or more, and may correspond to the fork of the counterpart forklift. Even when there are a plurality of sheath bodies (2), the locking means (5) need only be provided on one sheath body (2).

(1) Lifting stand
(2) Sheath body
(5) Locking means
(53) Guide surface
(6) Roller
(7) Linkage
(8) Ground lever
(9) Spring biasing means
(91) Spring
(92) Balance weight
(94) Support member

Claims (6)

A sheath (2) having a fork insertion space for receiving a fork (100) of a forklift, a clamp part (4) disposed above the sheath (2) and gripping an upper edge of the container (200), and a container ( 200) has a contact part (12) for supporting the body part, and the fork (100) is inserted into the sheath body (2), the upper edge of the container is gripped by the clamp part (4), and the fork ( In the lifting platform (1) for lifting the container by raising 100)
The lifting platform (1) includes a locking means (5) for the fork (100) inserted into the sheath body (2) on the fork withdrawal side of the sheath body (2),
The locking means (5)
A guide surface (53) disposed above the fork insertion space and inclined so that the fork withdrawal side is low;
A roller (6) capable of moving along the guide surface (53) and pushing down the upper surface of the fork (100);
One end is connected to the roller (6), the other end protrudes downward so that it can come into contact with the floor, and the middle part is supported so as to be rotatable in a vertical plane, and the roller (6) is pushed in the downward direction. A grounding lever (8) biasing in the direction,
With
At the raised position of the lifting platform (1), the grounding lever (8) rotates and the roller (6) advances in the wedge space between the upper surface of the fork (100) and the guide surface (53). Then the upper surface of the fork (100) is pushed down and locked, and when the lifting base (1) is lowered and the lower end of the grounding lever (8) is grounded, the grounding lever (8) rotates in the opposite direction. The lifting base in which the roller (6) connected to the grounding lever (8) rises along the guide surface (53) and releases the lock on the upper surface of the fork (100).   One end of the roller (6) and the grounding lever (8) are connected via a connecting rod (7), and the connecting rod (7) moves the roller (6) by rotating the grounding lever (8). The lifting platform according to claim 1, wherein the lifting platform is moved along the guide surface (53).   The lifting stand according to claim 1 or 2, further comprising means (9) for biasing one end of the grounding lever (8) in a downward projecting direction.   The means (9) for biasing the grounding lever (8) is a spring (91) locked to the grounding lever (8), and the grounding lever (8) is elastically applied by the spring (91). The lifting stand according to claim 3, wherein one end of the suspension is biased in a downward projecting direction.   The means (9) for biasing the grounding lever (8) is a balance weight (92) attached to the grounding lever (8), and the grounding lever (8) depends on the weight of the balance weight (92). The lifting base according to claim 3, wherein one end of) is biased in a downward projecting direction.   The lifting stand according to claim 1 or 2, further comprising a fulcrum member (94) for tilting the lifting stand (1) forward on an inner upper surface on the opening side of the sheath body (2).

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