JP5531399B2 - Elevator lock device - Google Patents

Description

  The present invention relates to a safe locking device that supports a heavy lifting body, and more particularly to a locking device that can support a heavy lifting body with a light operating force.

  As shown in FIG. 6, the conventional general lifting / lowering body locking device has holes 11a and 12a formed in the horizontal direction in the lifting body 11 and the support frame 12, respectively, so that these holes 11a and 12a are at the same level. In the set state, the pin 13 was inserted into the holes 11a and 12a. Since the pins 13 inserted into the support frame 12 support the elevating body 11, the elevating body 11 can be prevented from falling.

As a lifting device locking device, Patent Documents 1 to 3 disclose a pallet drop prevention device for a multilevel parking garage.
Japanese Utility Model Publication No. 1-129441 Japanese Utility Model Publication No. 7-4711 JP-A-8-82107

  However, in the conventional lifting / lowering body locking device, as the weight of the lifting / lowering body 11 increases, the mass of the pin 13 also increases. For this reason, when the pin 13 is so large that it cannot be supported by human power, a method of inserting the pin 13 using a drive device such as electric power or hydraulic pressure has been adopted. The insertion method using the drive device leads to an increase in size and complexity of the lock device.

  Accordingly, an object of the present invention is to provide a lock device that can be safely operated manually without using a driving device such as electric power and hydraulic pressure.

  In addition, in the conventional lifting / lowering body locking device, it is necessary to set the hole 12a of the support frame 12 and the hole 11a of the lifting / lowering body 11 at the same level prior to inserting the pin 13, which is troublesome. It was over. Furthermore, the level to be locked is limited to a certain level, and locking at an arbitrary level is impossible.

  Accordingly, another object of the present invention is to provide a lock device that automatically operates without setting the holes of the elevating body and the support frame to the same level.

In order to solve the above-mentioned problem, the invention according to claim 1 is a lock device that supports the lifting body by engaging a stopper with the lifting body, and is attached to the support frame in a horizontal direction. A shaft, a stopper that rotates around the shaft so that it can tilt in one direction toward the lift and away from the lift, and the stopper in the one direction and the other An operating member that tilts in the direction, and the stopper is formed in a stepwise manner in parallel with the first contact surface that contacts the support frame and the first contact surface, and the second contact that contacts the lifting body Is provided between the first contact surface and the second contact surface, and is inclined with respect to the first contact surface and the second contact surface. a contact with the contact surface, the, to operate the operating member Thus, the unlocked state in which the stopper is separated from the lifting body and the locked state in which the stopper is engaged with the lifting body are switched. In the unlocked state, the center of gravity of the stopper is The third contact surface of the stopper hits the support frame, and the center of gravity of the stopper is in the locked state with respect to the center of the shaft body. The locking device of the lifting body, which is located on the lifting body side, the first contact surface of the stopper hits the support frame, and the second contact surface of the stopper hits the lifting body.

The invention according to claim 2 is a locking device that supports the lifting body by engaging a stopper with the lifting body, the shaft body being attached to the support frame in a horizontal direction, and the lifting body. A stopper that rotates around the shaft so that it can tilt in one direction toward and away from the elevator, and an operation member that tilts the stopper in the one direction and the other direction, The stopper includes: a first contact surface that contacts the support frame; a second contact surface that is parallel to the first contact surface and formed stepwise; A third contact surface provided between the first contact surface and the second contact surface and inclined with respect to the first contact surface and the second contact surface. and, by operating the operating member, said stopper Is switched between a lock release state in which the lifter is separated from the lifting body and an automatic lock setting state in which the stopper leans against the lift body. On the other hand, the third contact surface of the stopper contacts the support frame, and the center of gravity of the stopper is set to the center of the shaft body in the set state of the automatic lock. When the lifting body is located on the lifting body side and is lifted or lowered, the stopper automatically enters the hole or recess of the lifting body, and the first contact surface of the stopper hits the support frame. The second contact surface of the stopper hits the lifting body, and the locking device for the lifting body is in a state where the stopper supports the lifting body.

The invention according to claim 3, in the locking device of the lifting body according to claim 1, Oite the locking state, by the lifting member pushes the stopper downward, the shaft body downward And the gap between the stopper and the support frame disappears, and the gap is restored by the elasticity of the shaft itself in the unlocked state.
According to a fourth aspect of the present invention, in the locking device for the lifting body according to the second aspect, in the set state of the automatic lock, when the lifting body pushes the stopper downward, the shaft body moves downward. And the gap between the stopper and the support frame disappears, and the gap is restored by the elasticity of the shaft itself in the unlocked state.

According to a fifth aspect of the present invention, in the locking device for the lifting body according to the first or third aspect , the position of the center of gravity of the stopper in the unlocked state and the position of the center of gravity of the stopper in the locked state are the shaft body. It is characterized in that it is arranged in the vicinity of a vertical plane including the center of.
The invention according to claim 6 is the locking device of the lifting body according to claim 2 or 4, wherein the gravity center position of the stopper in the unlocked state and the gravity center position of the stopper in the automatic lock set state are: It is arranged in the vicinity of a vertical plane including the center of the shaft body.

According to a seventh aspect of the present invention, in the locking device for the lifting body according to any one of the first to sixth aspects, the counterweight for balancing the mass of the stopper, the operating member, and the shaft body are The stopper is configured integrally with the stopper, and the gravity center position of the stopper is the gravity center position of the integral product.

The invention according to claim 8 is the lifting device locking device according to any one of claims 1, 3, 5 and 7 , wherein a plurality of the stoppers are provided at intervals in the axial direction of the shaft body, The lift body is provided with a plurality of holes or recesses into which the plurality of stoppers enter in the locked state .
The invention according to claim 9 is the lifting device locking device according to any one of claims 2, 4, 6 and 7, wherein a plurality of the stoppers are provided at intervals in the axial direction of the shaft body, The lifting body is provided with a plurality of holes or recesses into which the plurality of stoppers enter when the automatic lock is set.

  By operating the operation member and tilting the stopper in one direction and the other direction, the lock release state and the lock state are switched. In the locked state, the center of gravity of the stopper is located on the lifting body side with respect to the vertical surface including the center line of the shaft body, and in the unlocked state, the center of gravity of the stopper is lifted relative to the vertical surface including the center line of the shaft body. Therefore, even if the mass of the stopper is large, the moment required to tilt the stopper in one direction and the other direction can be reduced. As a result, a locking device that can be safely operated manually is possible.

  Further, in the set state of the automatic lock, the stopper leans against the lifting body, and there is no stopper in the hole or recess of the lifting body. When the elevating body is raised or lowered and the stopper comes to the position of the hole or recess, the stopper automatically enters the hole or recess, and the stopper supports the elevating body. Therefore, the locking device can be automatically operated without setting the holes of the elevating body and the support frame to the same level.

  Hereinafter, a locking device for a lifting body according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a vertical sectional view of the locking device. 2 shows the lock device in the unlocked state, FIG. 3 shows the lock device in the locked state, and FIG. 4 shows the set state of the automatic lock. FIG. 5 shows a perspective view of a stopper and related equipment such as a handle for operating the stopper.

  As shown in FIG. 1, the inverted triangular stopper 1 tilts to the left and right about a rotation shaft 2 as a shaft body. When it is tilted to the left, it is in the unlocked state, which is shown in FIG. When tilted to the right, the upper right end of the stopper 1 enters the hole 3 a provided in the lifting body 3. When the lifting body 3 is lowered in this state, the stopper 1 supports and locks the lifting body 3. This locked state is shown in FIG. Two stoppers 1 are provided apart from each other in the axial direction of the rotating shaft 2 (see FIG. 5), and two holes 3 a of the elevating body 3 are provided according to the number of the stoppers 1.

  When the stopper 1 is tilted to the right, the stopper 1 may lean against the wall surface of the elevator 3 without entering the hole 3a of the elevator 3. When the elevating body 3 is raised in this state and the stopper 1 comes to the position of the hole 3a, the stopper 1 automatically enters the hole 3a, and the stopper 1 supports the elevating body 3. The automatic lock setting state is shown in FIG.

  As shown in FIG. 1, the support frame 4 that supports the elevating body 3 is provided with a stopper accommodating space 4a in which the stopper 1 is accommodated. The rotating shaft 2 is attached to the lower end of the storage space 4a with the rotating shaft 2 facing in the horizontal direction. The rotary shaft 2 is rotatably attached to the support frame 4 by a bearing 5 (see FIG. 5) having a low frictional resistance. A lower portion 1a of the stopper 1 viewed from the length direction of the rotating shaft 2 is formed in an arc shape. The support frame 4 is formed with an arc-shaped lower receiving surface 4 b corresponding to the lower portion 1 a of the stopper 1. The lower part 1a of the stopper 1 and the lower receiving surface 4b of the support frame 4 are slightly separated, and a gap g of about 1 mm is formed between them.

  As shown in FIG. 3, on the upper surface of the inverted triangular stopper 1, a left first contact surface 1b and a right second contact surface 1c projecting upward from the first contact surface 1b. Is formed. These first and second contact surfaces 1b and 1c formed in steps are parallel to each other. In the locked state of FIG. 3, the first contact surface 1 b hits the upper receiving surface 4 c of the support frame 4, and the rotation of the stopper 1 in one direction toward the elevating body 3 is restricted. Since the second contact surface 1c of the stopper 1 enters the hole 3a of the lifting body 3 in a state where the rotation is restricted, the lifting body 3 can be supported. In this locked state, when the elevating body 3 pushes the stopper 1 downward, the rotating shaft 2 bends downward and there is no gap between the lower portion 1 a of the stopper 1 and the lower receiving surface 4 b of the support frame 4. . For this reason, the heavy lifting body 3 can be supported.

  As shown in FIG. 2, a third contact surface 1d inclined with respect to the first contact surface 1b and the second contact surface 1c of the stopper 1 is formed. When the stopper 1 is rotated by a predetermined angle in the other direction away from the elevator 3, the third contact surface 1 d hits the vertical receiving surface 4 d of the support frame 4 and the rotation of the stopper 1 to the other is restricted. This state in which the stopper 1 is separated from the elevating body 3 is a lock release state. When the lifting body 3 is released from the stopper 1, the rotating shaft 2 restores the gap g between the stopper 1 and the lower receiving surface 4b of the support frame 4 by its own elasticity.

  As shown in FIG. 5, the stopper 1 is configured integrally with a rotating shaft 2, a counterweight 6, and a handle 7 as an operation member. The counterweight 6 is arranged on the opposite side across the center of gravity of the stopper 1 and the rotation shaft 2, and balances the mass of the stopper 1. When the handle 7 is rotated, the integrated product rotates integrally.

  As shown in FIG. 2, in the unlocked state, the center of gravity C <b> 1 of the integral product is disposed on the opposite side of the lifting body 3 with respect to the center C <b> 2 of the rotating shaft 2, that is, on the left side. On the other hand, as shown in FIG. 3, in the locked state, the center of gravity C <b> 1 of the integrated product is arranged so as to be on the lifting body 3 side, that is, on the right side with respect to the center C <b> 2 of the rotating shaft 2. The center of gravity C1 of the integrated product in the unlocked state and the locked state is disposed in the vicinity of the vertical plane P1 including the center C2 of the rotating shaft 2 and above the horizontal plane P2 including the center C2 of the rotating shaft 2.

  By operating the handle by tilting it to the left or right, the stopper 1 tilts to the left or right. Then, when the stopper 1 tilts left and right, the lock release state and the lock state are switched. The center of gravity C1 of the integrated product is disposed in the vicinity of the vertical plane P1 including the center C2 of the rotating shaft 2, and moves slightly to the left and right with respect to the center C2 of the rotating shaft 2. For this reason, even if the mass of the stopper 1 is large, the moment required to tilt the stopper 1 to the left and right can be reduced. As a result, manual operation is possible.

  As shown in FIG. 3, when the elevating body 3 is lowered while the stopper 1 is tilted to the right, the elevating body 3 pushes the stopper 1 downward, the rotary shaft 2 is bent downward, and the gap g disappears. Since the upper left of the stopper 1 is in contact with the support frame 4, the stopper 1 stops moving and supports the elevating body 3.

  As shown in FIG. 2, when releasing the lock, the lifting body 3 is lifted upward by the drive device, and then the handle 7 is operated to tilt the stopper 1 to the left. At this time, the rotating shaft 2 is not elastically bent by itself and does not affect the handle operating force because the gap g is restored. A drive device such as a jack or a crane is used to raise and lower the elevating body 3.

  As shown in FIG. 4, in the automatic lock set state, the stopper 1 is leaning against the wall surface of the lifting body 3, and the stopper 1 is not in the hole 3 a of the lifting body 3. In this automatic lock set state, the center of gravity C1 of the integral product is arranged on the lifting body 3 side, that is, on the right side with respect to the center C2 of the rotating shaft 2. When the elevating body 3 rises and the hole 3a reaches the position of the stopper 1, the stopper 1 automatically enters the hole 3a of the elevating body 3, and the stopper 1 is in a locked state that supports the elevating body 3.

  In addition, this invention is not limited to the said embodiment, It can change into various embodiment in the range which does not change the summary of this invention. For example, when the stopper is engaged with the lifting body, the stopper may enter the recess or lower surface of the lifting body instead of entering the hole of the lifting body. As the operation member, a driving device such as electric power or hydraulic pressure may be used without using a handle by manual operation.

The vertical sectional view of the locking device of one embodiment of the present invention Vertical sectional view of the locking device in the unlocked state Vertical section of the locking device in the locked state Vertical section of the locking device with automatic locking set Perspective view of related equipment Vertical sectional view showing a conventional locking device

Explanation of symbols

1 ... Stopper 2 ... Rotating shaft (shaft body)
3 ... Lifting body 3a ... Hole 4 ... Support frame 6 ... Counterweight 7 ... Handle (operating member)
C1... Center of gravity of the integral product C2 ... Center of shaft body g ... Clearance P1 ... Vertical plane

Claims (9)

A locking device that supports the lifting body by engaging the stopper with the lifting body,
A shaft attached to the support frame in a state of facing the horizontal direction;
A stopper that rotates around the shaft so that it can tilt in one direction toward the elevator and in another direction away from the elevator;
An operation member for tilting the stopper in the one direction and the other direction,
The stopper includes a first abutting surface that contacts the support frame, a second abutting surface that is parallel to the first abutting surface and formed stepwise, and that contacts the elevating body, and the first abutting surface. A third contact surface that is provided between the contact surface and the second contact surface and is inclined with respect to the first contact surface and the second contact surface;
By operating the operation member, the unlocked state in which the stopper is separated from the lifting body and the locked state in which the stopper is engaged with the lifting body are switched,
In the unlocked state, the center of gravity of the stopper is located on the opposite side of the lifting body with respect to the center of the shaft body, the third contact surface of the stopper hits the support frame,
In the locked state, the center of gravity of the stopper is positioned on the lifting body side with respect to the center of the shaft body, the first contact surface of the stopper hits the support frame, and the second contact of the stopper A locking device for a lifting body whose surface hits the lifting body. A locking device that supports the lifting body by engaging the stopper with the lifting body,
A shaft attached to the support frame in a state of facing the horizontal direction;
A stopper that rotates around the shaft so that it can tilt in one direction toward the elevator and in another direction away from the elevator;
An operation member for tilting the stopper in the one direction and the other direction,
The stopper includes a first abutting surface that contacts the support frame, a second abutting surface that is parallel to the first abutting surface and formed stepwise, and that contacts the elevating body, and the first abutting surface. A third contact surface that is provided between the contact surface and the second contact surface and is inclined with respect to the first contact surface and the second contact surface;
By operating the operation member, the lock released state in which the stopper is separated from the lifting body and the automatic lock setting state in which the stopper leans against the lifting body are switched,
In the unlocked state, the center of gravity of the stopper is located on the opposite side of the lifting body with respect to the center of the shaft body, the third contact surface of the stopper hits the support frame,
In the set state of the automatic lock, the center of gravity of the stopper is positioned on the lifting body side with respect to the center of the shaft body, and when the lifting body is raised or lowered, the stopper automatically moves to the lifting body. It enters into the hole or the recess, the first contact surface of the stopper hits the support frame, the second contact surface of the stopper hits the lifting body, and the stopper supports the lifting body. Elevator lock device. In the locked state , when the lifting body pushes the stopper downward, the shaft body bends downward and there is no gap between the stopper and the support frame,
The lifting / lowering body locking device according to claim 1 , wherein the clearance is restored by the elasticity of the shaft itself in the unlocked state. In the set state of the automatic lock , when the lifting body pushes the stopper downward, the shaft body bends downward and there is no gap between the stopper and the support frame,
3. The lifting / lowering body locking device according to claim 2 , wherein the clearance is restored by the elasticity of the shaft body itself in the unlocked state. Center-of-gravity position of the stopper in the lock released state, and the center of gravity of the stopper in the locked state, to claim 1 or 3, characterized in that it is arranged in the vicinity of the vertical plane containing the center of the shaft body The lifting / lowering body locking device described. The center of gravity of the stopper in the lock released state, and the center of gravity of the stopper in the set state of the automatic lock, according to claim characterized in that it is arranged in the vicinity of the vertical plane containing the center of the shaft body 2 Or the raising / lowering body locking device of 4. The counterweight for balancing the mass of the stopper, the operating member and the shaft body are configured integrally with the stopper,
A center of gravity of said stopper, vertically movable body of the locking device according to any one of claims 1 to 6, characterized in that a center of gravity of the piece goods. A plurality of the stoppers are provided at intervals in the axial direction of the shaft body,
Wherein the lifting body is in the locked state, the lifting of the locking device according to any one of claims 1, 3, 5, 7, wherein a plurality of holes or recesses wherein the plurality of stopper enters is provided . A plurality of the stoppers are provided at intervals in the axial direction of the shaft body,
The lifting body according to any one of claims 2, 4, 6, and 7, wherein the lifting body is provided with a plurality of holes or recesses into which the plurality of stoppers enter in the set state of the automatic lock. Locking device.

Images