JP2001301627A - Locking device for dolly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability in releasing fixing of a lock device in a dolly without decreasing containing quantity on it. SOLUTION: A down pedal 20 is rotatably shaft-supported on a support body 16 disposed on a bottom part of a main body through a first shaft 22. An up pedal 26 rotatably shaft-supported on the down pedal 20 through a third shaft 28 is rotatably shaft-supported on a leg 18 supported on the support body 16 through a second shaft 24. On a bracket 32 disposed on the bottom part of the main body, a fixing releasing pedal 36 is rotatably shaft-supported through a fourth shaft 34. On the fixing releasing pedal 36, an actuation member 44 which can be applied to upper surfaces of the down pedal 20 and the up pedal 26 is disposed. When an operation part 40c of the fixing releasing pedal 36 is pushed down as a lower end of the leg 18 faces a fixing position, an operation part 26b of the up pedal 26 is pushed down by the actuation member 44, thereby fixing is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device for a transport vehicle, and more particularly, to a transport vehicle configured to be movable by a plurality of casters disposed on a bottom portion of a main body. And a locking device.

[0002]

2. Description of the Related Art As shown in FIG. 7, a carrier such as a catering truck for carrying a large number of dishes and dishes is provided with a plurality of casters 12 at the bottom of a main body 10 so as to be movable via the casters 12. Is done. This transport vehicle is provided with a lock device 14 for fixing the position so as not to move at an arbitrary position. The locking device 14 includes a cylindrical support 16 which is vertically provided at the bottom of the main body 10 via a base 16a and which opens downward. A leg 18 is attached to the support 16 via a leg 18a. It is supported so that it can be raised and lowered. A disc-shaped base (lower end of the leg) 18b is disposed at the lower end of the leg 18a projecting from the lower end of the support 16, and the base 18b is
A fixed release position (FIG. 7) retracting above the lower end of the caster 12, and a fixing position (FIG. 8) projecting below the lower end.
It is configured to be movable between and. The leg 18 is normally urged upward by an elastic means such as a spring inserted into the support 16 so that the base 18b faces the fixing release position.

In the vicinity of the upper end of the support 16, a fork-like fork-like mounting portion 20 a formed at one end of the down pedal 20 is located with the support 16 interposed therebetween.
The operation unit 20b is rotatably supported through the main body 1 and is formed at the other end of the down pedal 20.
It extends outside 0. In addition, on the side peripheral portion of the support 16 below the shaft support portion of the down pedal 20, the long holes 16b, 16b ( (Only one is shown). The leg 1 is parallel to the first shaft 22.
One end of an up pedal 26 is rotatably supported by a second shaft 24 which is disposed on the leg 18a of the eighth and extends outward from each of the long holes 16b. This up pedal 26
As in the case of the down pedal 20, a fork-like mounting portion 26a is formed at one end thereof, and an operation portion 26b is formed at the other end thereof. When the operation portion 26b is supported by the second shaft 24, the operation portion 26b is moved to the operation portion 20 of the down pedal 20.
It extends in the same direction as b. The up pedal 26
Is configured to be rotatable inside the mounting portion 20a of the down pedal 20 without interfering with the down pedal 20.

[0004] The up pedal 26 is provided with a mounting portion 26a facing between a shaft support portion for the leg 18 and an operation portion 26b.
Is rotatably supported by a corresponding mounting portion 20 a of the down pedal 20 via a third shaft 28. The third
The shaft 28 is attached to the mounting portions 20a, 2 of the pedals 20, 26.
Each of the pieces located on both sides of the support portion 6a is pivotally supported, and does not interfere with the support 16 when the pedals 20, 26 are rotated.

[0005] The operation unit 2 of the down pedal 20
0b is a state in which the base 18b of the leg 18 faces the unlocking position as shown in FIG.
Above the operating portion 26b facing the operating position in the inclined position in FIG. The caster 12 is in contact with the floor surface FL, and the carrier is in a movable state. In this state, the down pedal 20
When the operator depresses the operation unit 20b with his / her foot, the pedal 20 rotates counterclockwise about the first shaft 22. The second shaft 24, which supports the up pedal 26 and the leg 18, is restricted by the long holes 16b, 16b of the support 16 and is configured to move only in the vertical direction. With the movement, the up pedal 26
Is a shaft supporting portion with respect to the leg portion 18a around the third shaft 28.
The (second shaft 24) rotates clockwise to move downward. As a result, the leg 18 descends along the support 16, and the base 18 b comes into contact with the floor surface FL to further move the caster 12.
By moving to the fixed position protruding below the lower end of the
The casters 12 are lifted off the floor FL, and the carrier is held in a fixed state where it cannot move (see FIG. 8).

When the base 18b reaches the fixed position, the third shaft 28 is opposite to the operation portion 26b with respect to a vertical line where the first shaft 22 and the second shaft 24 are aligned. Side, and the end of the operating portion 26b of the up pedal 26 facing the support 16 abuts on the support 16, whereby the rotation of the pedals 20, 26 is restricted (locked). That is, the force (weight of the main body 10) applied to the leg 18 at this time is
The base 18b is positioned and held at a fixed position because it acts in a direction (clockwise direction in FIG. 8) for bringing the base 6b into contact with the support 16. In this fixed state, the operation part 26b of the up pedal 26 is turned counterclockwise as shown in FIG.
It comes to a standby position above 0b in a substantially horizontal posture.

Next, when the operator depresses the operating portion 26b facing the standby position of the up pedal 26 with his / her foot,
The pedal 26 is connected to the leg 18 around the third shaft 28.
The shaft support (the second shaft 24) is rotated counterclockwise to move upward. At this time, the third shaft 28 is displaced toward the operation portion 26b from the vertical line where the first shaft 22 and the second shaft 24 are aligned, so that the rotation restriction is released (the force applied to the leg 18 is The operating portion 26b acts in a direction away from the support 16), and the up pedal 26
As the legs 18 rise along the support 16 with the rotation of the body, the main body 10 descends and the casters 12
L comes into contact. The casters 12 are on the floor FL.
After contact with the elastic member, the leg 18
Is raised, the base 18b moves to the unlocked position, the two pedals 20, 26 rotate in a predetermined direction, the operation unit 20b of the down pedal 20 returns to the initial standby position, and the up pedal The operation section 26b of 26 also returns to the initial operation position.

[0008]

In the above-mentioned transport vehicle,
An up pedal 26 smaller than the down pedal 20
In order to make it easy for an operator to step on the lock device 14 when releasing the fixed state, the operating portion 26b of the up pedal 26 is used.
The position of the lock device 14 is set so that the lock device 14 extends outside the main body 10 (see FIG. 8). However, in this case, since the operation portion 20b of the down pedal 20 greatly extends to the outside of the main body, the outer dimensions of the transport vehicle itself increase by the extent of the operation portion 20b. Therefore, in the fixed state of the lock device 14, a space between the operating portion 26b of the up pedal 26 and the bottom of the main body, in which an operator's foot enters, is inserted between the lock device 14 and the bottom of the main body with a spacer interposed therebetween. It is proposed to arrange the lock device 14 at a position where the pedal 26 does not extend outward from the main body by securing the lock device 14. However, in this case, there is a problem that the height of the transport vehicle itself is increased by the distance of the spacer. In addition, it is necessary to move the transport vehicle while accommodating it in a small elevator or the like, and when the external dimensions are regulated, the main body dimensions must be reduced by the amount of the spacers, such as a dining table or tableware. This leads to a drawback that the amount of stored items is reduced.

As described above, the locking device 14
The up-pedal 26 for releasing the fixed state of the down pedal 20 is small in size to rotate without interfering with the inside of the mounting portion of the down pedal 20, and therefore, it is pointed out that the operability is low.

[0010]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems inherent in the prior art, and has been proposed to solve the problem suitably. An object of the present invention is to provide a lock device for a transport vehicle that can improve operability at the time of fixing release.

[0011]

[Means for solving the problems] To overcome the above-mentioned problems,
In order to appropriately achieve the intended purpose, a lock device for a transport vehicle according to the present invention is provided at a bottom of a main body on which a plurality of casters are disposed, and supports a leg so as to be able to move up and down. A down pedal whose one end is rotatably supported on the support, and one end of which is rotatably supported on the leg, and a portion separated from the support is rotatable with the down pedal. An up pedal that is pivotally supported, and by pressing down an operation section on the other end side opposite to the pivot support section with respect to the support with the pivot section between the up pedal and the up pedal in the down pedal being pressed down, The lower end of the leg is moved to a fixed position protruding downward from the lower end of the caster, and the lower end of the leg is opposite to the lower end of the up pedal. Press the operation unit on the other end. In the locking device, the pivot portion of the up-pedal with the leg rises to move the lower end of the leg to a fixed release position retracted above the lower end of the caster. One end portion is rotatably supported at the other end, and an operation unit on the other end side opposite to the shaft support portion faces a position not interfering with the movement locus of the down pedal, and a shaft of the fixed release pedal. The operation unit of the unlocking pedal is disposed between the support unit and the operation unit, and can be brought into contact with the upper surface of the down pedal and the up pedal that is separated from each shaft support unit, and the lower end of the leg faces the fixed position. And an operating member for releasing the fixing by depressing the operating portion of the up pedal when depressed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a lock device for a transport vehicle according to the present invention will be described with reference to the accompanying drawings by way of a preferred embodiment. Since the basic structure of the lock device described in the related art with reference to FIGS. 7 and 8 is the same, the same members are denoted by the same reference numerals and detailed description thereof will be omitted.

That is, as shown in FIG. 1, a lock device 30 provided at the bottom of the main body 10 of the carrier has a mounting portion (one end portion) of the down pedal 20 on the support 16 via a first shaft 22. The mounting portion (one end) 26a of the up pedal 26 rotatably supported by the down pedal 20 via the third shaft 28 is attached to the support 16 while the rotatable shaft 20a is rotatably supported. Leg 18a of leg 18 supported to be able to move up and down
Is rotatably supported via a second shaft 24. In the lock device 30 according to the embodiment, the lock release state (the base 1
8b faces the unlocking position), the operating portion 20b facing the standby position of the down pedal 20 extends outward from the front end surface of the main body 10, but is fixed (the base 18b faces the fixing position). In the above, the up pedal 26
The operation section 26b facing the standby position of the main body 10 is supported by the support 16
Is set.

At the bottom of the main body 10, the support 16
The bracket 32 is disposed on the opposite side of the operation portions 20 b and 26 b of the pedals 20 and 26 from the extension side of the pedals 20 and 26, and the bracket 32 extends in parallel with the first shaft 22. One end in the longitudinal direction of the fixed release pedal 36 is rotatably supported via the four shafts 34. That is, as shown in FIG. 2, the fixing release pedal 36 includes a pair of mounting plates 38, 38 which are spaced apart in the axial direction of the fourth shaft 34 and face both sides of the down pedal 20. One end (rear end) in the longitudinal direction is supported by the fourth shaft 34. The other end of each mounting plate 38 facing forward from the support 16
At the (front end), a vertical portion 40b of an L-shaped operation plate 40 in which a horizontal portion 40a extends forward (opposite to the mounting plate 38).
The operation plates 40, 40 are connected via a connection plate 42 disposed between the lower surfaces of the horizontal portions 40a, 40a. The mounting plates 38, 38, the operating plates 40, 40, and the connecting plate 42 are all set so as to face positions where they do not interfere with the rotation of the down pedal 20 and the up pedal 26.

The vertical portions 40 of the operation plates 40, 40
An operating member 44 is provided between the mounting members 38 and 38 near the connecting portions 38 and 38. When the locking device 30 shown in FIG. 1 is unlocked, the unlocking pedal 36 is connected to the down pedal 20. The operating member 44 is held in a state in which the operating member 44 is in contact with the upper surface of the mounting portion 20a. And
In this state, the horizontal portions 4 of the operation plates 40, 40 are
0a, 40a is the operating part 20 of the down pedal 20.
It extends to almost the same position as the front end of b. At the front end of the horizontal portion 40a of each operation plate 40, an operation portion 40c which is depressed by an operator to depress the fixing release pedal 36 is bent so as to extend substantially horizontally outward. It is. The operation units 40c, 40c are connected to the down pedal 2
0 at a position that does not interfere with the trajectory of the
It is configured so that c and 40c can be depressed by stepping alone.

As shown in FIGS. 3 and 4, the operating member 44 is positioned so as to face the turning trajectory of the operating portion 26b of the up pedal 26, and when the lock device 30 shown in FIG. The fixed release pedal 36 is configured to be held in a state in which the operating member 44 is in contact with the upper surface of the operation portion 26b of the up pedal 26. Also, at this time, a sufficient space is defined between the operating portions 40c, 40c of the fixing release pedal 36 and the bottom of the main body so that a necessary space enough for an operator's foot to be inserted is defined. When the operator depresses the operation units 40c, 40c with his / her feet, the fixing release pedal 36 is moved to the fourth position.
The operation member 44 is rotated counterclockwise about the shaft 34.
As a result, the operation section 26b of the up pedal 26 is pressed down, whereby the rotation restriction of the down pedal 20 and the up pedal 26 in the lock device 30 is released.

[0017]

Next, the operation of the lock device for a carrier according to the embodiment will be described below. In addition, in a state where the caster 12 is in contact with the floor surface FL and the transport vehicle is movable,
It is assumed that the lock device 30 is in the unlocked state shown in FIG. When the position of the transport vehicle is fixed by operating the lock device 30, the operation unit 20b facing the standby position of the down pedal 20 is depressed with a foot as described above. As shown in FIG. 3, as the down pedal 20 rotates counterclockwise about the first shaft 22, the up pedal 26 moves the leg 18 a about the third shaft 28.
The second shaft 24 rotates clockwise to move downward. As a result, the legs 18 move down along the support 16, and the base 18 b abuts on the floor surface FL and moves to a fixed position where the base 18 b further projects below the lower end of the casters 12, so that the casters 12 are moved to the floor. The vehicle lifts up from the surface FL, and is held in a fixed state that cannot be moved (see FIG. 4).

When the base 18b arrives at the fixed position, as shown in FIG. 4, the third shaft 28 moves with respect to the vertical line where the first shaft 22 and the second shaft 24 are aligned. The rear end of the operating portion 26b of the up pedal 26 that faces the support 16 abuts against the support 16 and the pedal 2
The rotation of 0, 26 is restricted, and the base 18b is positioned and held at a fixed position. In this state, the operating member 44 disposed on the unlocking pedal 36 abuts on the upper surface of the operating portion 26b of the up pedal 26, and the operating portions 40c, 40c of the unlocking pedal 36 are in contact with the bottom of the main body. In a state where a required space is defined, the user faces upward from the operating portion 20b of the down pedal 20 facing the operating position.

Next, when releasing the lock state of the lock device 30, the operation unit 40 of the lock release pedal 36 is released.
The foot is put in the space between c, 40c and the bottom of the main body, and the operation parts 40c, 40c are depressed. As a result, the unlocking pedal 36 rotates counterclockwise about the fourth shaft 34,
The operating member 26 of the up pedal 26 is
b is pushed down. Then, the up pedal 26 is pivotally connected to the leg 18a (the second
The shaft 24) is rotated counterclockwise to move upward, and the third shaft 28 is displaced forward of a vertical line where the first shaft 22 and the second shaft 24 are aligned. Is released (the state of FIG. 3). Thereafter, the legs 18 are supported
By ascending along 6, the main body 10 descends, and the casters 12 come into contact with the floor surface FL, so that the carrier becomes movable. The elasticity of the elastic means causes the base 18b to move to the fixed release position, and causes the operating part 20b of the down pedal 20 and the operating part 2 of the up pedal 26 to move.
6b return to the initial standby position or operating position, respectively.

As described above, in the lock device 30 of the embodiment, the fixing release pedal 36 for rotating the up pedal 26 for releasing the lock is extended to substantially the same position as the down pedal 20. The operation of releasing the fixing can be easily performed. Further, since the support 16 is disposed at a position where the operation portion 26b of the up pedal 26 does not extend outward from the bottom of the main body, the extension of the down pedal 20 from the bottom of the main body can be minimized. It is possible to suppress an increase in the outer dimensions of the transport vehicle itself. Further, in the fixed state of the lock device 30, a space where a foot can be inserted is defined between the operating portions 40c, 40c of the unlocking pedal 36 and the bottom of the main body without using a spacer. In addition, the height of the transport vehicle does not increase, or the body size does not decrease, so that the storage capacity does not decrease.

Since the pair of operating portions 40c, 40c of the fixed release pedal 36 are separated from each other on the left and right sides of the down pedal 20, the down pivot that rotates after the rotation regulation is released is released. The foot is not caught between the pedal 20 and the pedal 20. Further, since the fixing release pedal 36 extends to the same position as the down pedal 20, the position of the pedal 36 at the foot of the operator can be easily confirmed.

Here, in the embodiment described above, the main body 1
5, the front surface of the down pedal 20 is configured to be flush with the bottom portion. As shown in FIGS. Alternatively, a concave portion 46 opening forward and downward may be formed, and a foot may be inserted into the concave portion 46 to push down the operation portion 20b. In this case, the support 16 can be provided at a position where the down pedal 20 does not extend outward from the main body 10, and the outer dimensions of the carrier itself can be reduced. That is, even when the outer dimensions of the transport vehicle itself are regulated, it is possible to cope without reducing the size of the main body 10. As shown by a dashed line in FIG. 6, the operating portion 20b of the down pedal 20 and the unlocking pedal 3
A concave portion 48 having a size that allows the user to step on both operation portions 40c, 40c may be formed in the lower portion of the front surface of the main body 10.

The type of transport vehicle is not limited to a table truck for transporting tables and dishes, but may be any type of vehicle having a structure in which casters are provided at the bottom of the main body so as to be movable. Of course not.

[0024]

As described above, according to the lock device for a transport vehicle according to the present invention, since the fixing release pedal is provided at a position separated from the locus of movement of the down pedal, the operating portion of the up pedal can be moved from the bottom of the main body. It is not necessary to extend outward, and the outer dimensions of the transport vehicle itself can be reduced. Further, the fixed release pedal can be set to the same size as the down pedal, and the operation for releasing the fixed state can be easily performed. Furthermore, since the required space is defined between the unlocking pedal and the bottom of the main body in the fixed state of the lock device, the height of the carrier itself is increased, or the size of the main body is reduced. There is no reduction in capacity.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a lock device according to an embodiment of the present invention in an unlocked state.

FIG. 2 is a plan view showing the lock device according to the embodiment in an unlocked state.

FIG. 3 is a partially cutaway side view showing a state in which a fixed state of the lock device according to the embodiment is released.

FIG. 4 is a partially cutaway side view showing the lock device according to the embodiment in a fixed state.

FIG. 5 is an explanatory side view showing a modification of the main body in which the lock device according to the embodiment is provided.

FIG. 6 is an explanatory plan view showing a modification of the main body in which the lock device according to the embodiment is provided.

FIG. 7 is a side view showing a lock device according to the related art in an unlocked state.

FIG. 8 is a side view showing a lock device according to a conventional technique in a fixed state.

[Description of Signs] 10 main body, 12 casters, 16 support, 18 legs,
20 down pedal 20b operation section, 26 up pedal, 26b operation section,
36 Fixed release pedal 40c Operating part, 44 Operating member

Claims (2)

[Claims] 1. A body provided with a plurality of casters (12).
A support (16) disposed at the bottom of (10) and supporting the leg (18) so as to be able to move up and down, and a down pedal (20) having one end rotatably supported by the support (16). An up pedal (26), one end of which is rotatably supported by the leg (18), and a portion separated from the shaft support is rotatably supported by the down pedal (20). By pressing down the operating portion (20b) on the other end side opposite to the pivot portion with respect to the support (16) with the pivot portion with the up pedal (26) in the down pedal (20) interposed therebetween, The pivot portion of the up pedal (26) with the leg (18) is lowered to move the lower end of the leg (18) to a fixed position protruding below the lower end of the caster (12), and the up pedal ( The operation unit (26b) on the other end side opposite to the shaft support portion with respect to the leg (18) with the shaft support portion with the down pedal (20) in 26)
By pressing down, the pivot portion of the up pedal (26) with the leg (18) rises, and the lower end of the leg (18) is caster (12).
A lock device configured to move to a fixed release position retracted above the lower end of the main body (10), wherein one end is rotatably supported at the bottom of the main body (10), and the other end of the other end opposite to the shaft support is provided. An operation unit (40c), a fixing release pedal (36) facing a position that does not interfere with the movement trajectory of the down pedal (20), a pivot portion and an operation unit (40c) of the fixing release pedal (36)
Is disposed between the down pedal (20) and the up pedal (26).
When the operating portion (40c) of the unlocking pedal (36) is pressed down with the lower end of the leg (18) facing the fixed position, by pressing down the operating portion (26b) of the up pedal (26). A lock device for a transport vehicle, comprising an operating member (44) for releasing fixing. 2. The operation part (40c) of the fixing release pedal (36) and the main body (10) with the lower end of the leg (18) facing the fixing position.
The lock device according to claim 1, wherein a required space is defined between the lock device and the bottom of the vehicle.