JPH0511206Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a method for moving furniture such as a chest of drawers by moving wheels installed at the four corners of the lower part of the furniture downward from the bottom of the furniture. The present invention relates to a lifting and moving device for furniture that can be moved by maintaining its state.

[Prior art] Conventionally, as this type of moving device,
As shown in Publication No. 151537, threaded rods are installed along both sides of the bottom of the furniture body, and a nut is screwed onto the threaded rod, and other links are connected at one end to the nut. The wheel stand is supported by the end of the link and the other end of the link, one end of which is connected to the peripheral wall of the underframe at the bottom of the furniture body, and the wheel stand is moved by rotating the threaded rod with the handle and moving the nut along the threaded rod. A device in which wheels are moved up and down is known.

In the case of such a moving device, there is no need for a locking device to keep the moving wheels in the lowered state, so they have the advantage of being easy to operate. Since the rod has to be rotated many times, the furniture cannot be moved quickly.

[Problems to be solved by the invention] The present invention was made with the aim of solving the above-mentioned drawbacks of the conventional technology. The operation can be performed by rotating the operating shaft by about half a turn, so that the vertical movement of the wheel can be completed in a short time, and the maintenance of the downward movement state of the wheel and the release of that holding can be performed by rotating the operating shaft in one direction. To provide a device for lifting up and moving furniture, which can move a wheel up and down with a simple operation by only slightly turning the wheel.

[Means for solving the problem] That is, the present invention has a casing arranged at the four corners of the lower part of furniture such as a chest of drawers, and a casing that is attached to each casing via a link mechanism and is moved up and down by the operation of this link mechanism. A moving wheel is provided on the casing, an operating shaft is installed at the bottom of the furniture in the front-rear direction between the left and right casings, and when the operating shaft rotates in one direction, each of the left and right a rotational movement transmission mechanism disposed between each of the link mechanisms and the operating shaft so that the link mechanism of the casing is operated and the moving wheels are moved downward by this operation; A cam that is firmly inserted into a shaft and has a pin sliding protrusion and a locking claw engaging protrusion on its outer periphery, and a locking device that is installed at the bottom of furniture, and the locking device includes: An arc-shaped elongated hole of a predetermined length is bored along the outer circumference of the cam in both side plates that hang down on both sides of the cam, and the starting and ending ends are widened on the outside to form a widened part. A housing is formed, a sliding pin is inserted into an elongated hole so as to cross between both side plates of the housing, and the sliding pin is pivotally connected between both side plates of the housing so that one end thereof is attached to the outer circumferential surface of the cam. It is composed of a locking pawl that faces the pin, a spring stretched between the pin locking pawl, and a spring that biases one end of the locking pawl in a direction away from the outer peripheral surface of the cam. In particular, the above objectives are achieved.

[Usage] With the above configuration, when moving furniture, each link mechanism is activated via the rotational movement transmission mechanism by rotating the operating shaft by a predetermined angle using a separately prepared handle, etc. As a result, the moving wheels at the four corners are moved down. On the other hand, since the cam is rotated by rotating the operating shaft, the pin inserted through the elongated hole on both side plates is slid by the protrusion of the cam in the direction of rotation of the cam. When the pin reaches the end of the elongated hole, one end of the locking claw is engaged with the engagement protrusion, so the operating shaft is prevented from rotating in the other direction, and the wheel is in a downward motion state. is maintained. Therefore, furniture can be moved using these wheels.

After moving the furniture, by slightly rotating the operating shaft in the same direction, the pin is slid by the protrusion of the cam to the outside of the widened part at the end of the long hole, and then the biasing force of the spring is applied. This will cause it to be drawn toward the starting end of the elongated hole. As a result, the locking pawl is separated from the protrusion by the biasing force of the separation spring, and the prevention of rotation in the other direction with respect to the operating shaft is released. Therefore, the wheels are moved upward by the weight of the furniture, and the bottom surface of the furniture is grounded.

[Example] Hereinafter, an example of the present invention will be described based on the drawings. 1 is a casing arranged at the four corners of the lower surface of a furniture main body A such as a chest of drawers, which is formed hollow and whose height is slightly lower than the height of the underframe B arranged at the bottom of the main body A, Also, the upper surface part has both ends 1
a, 1a are formed one step lower than the middle portion, and both end portions 1a, 1a are attached to the lower surface of the main body A via attachment members C, C. 2 is casing 1
It is a wheel support disposed inside the vehicle, and is formed by side plates 2a, 2a and a top plate 2b, and moving wheels 3 are vertically provided on the lower surface of the top plate 2b. 4
is a mechanism consisting of upper links 5, 5 and lower links 6, 6, one end of each link is attached to both sides of the casing 1, and the other end is attached to a support so that the pivot points of each link form a parallelogram. The wheel 3 is pivotally connected to both side plates 2a, 2a of the wheel 2, and when the link mechanism 4 is operated, the wheel 3 moves up and down. 7
is a connection part to which one end of an actuation wire 24, which will be described later, is connected, and a plate 8 is installed between the tips of the extensions on the other end of the upper links 5, 5, and in the center of this plate 8, the upper surface is connected. A receiving seat 9 having an arc shape is fixed,
A wire insertion slit 10 is formed so as to pass through the plate 8 and the receiving seat 9. Reference numeral 11 denotes a wire guide roller, which is pivotally supported by a bracket 12 bored in the center of the lower part of the casing 1. Reference numerals 13, 13 are springs, which are wound around pivot pins 14, 14 on one end side of the upper links 5, 5, and
One end is hooked to both side surfaces of the casing 1, and the other end is hooked to the pivot pins 15, 15 on the other end side of the upper links 5, 5, so that the other end side of the upper links 5, 5 is directed upward. The wheel 3 is biased upwardly from the lower surface of the underframe B.

Reference numeral 21 denotes an operating shaft mounted in the front-rear direction of the main body A (in the drawing) by having both ends rotatably supported by brackets 22, 22 vertically installed on the lower surface of the center of the main body A; formed on the square shaft portion 21a,
The rotating handle H can be detachably inserted. 23, 23 are left and right casings 1, 1
This is a wire winding drum that is firmly inserted into the operating shaft 21 so as to be positioned on the line connecting the two. 24, 24 are wires for operating the link mechanisms 4, 4 of the left and right casings 1, 1 in conjunction with the rotation of the operating shaft 21, and each has a hook at one end. A pin 25 is connected to the link mechanism 4 by passing one end of the pin 25 through a slit 9 formed in the wire connection part 7 and placing the latching pin 25 on the receiving seat 9. The other end of each wire guide roller 11 is connected to the drum 23 by a locking pin 26. 27
is a turnbuckle inserted in the middle of the wire 24, which allows the degree of tension of the wire 24 to be adjusted.

A cam 31 is fixedly inserted into the operating shaft 21, and a pin sliding protrusion 32 and a claw engaging protrusion 33 are formed on the outer periphery of the cam. Reference numeral 34 denotes a housing of the locking device, which is composed of both side plates 34a, 34a hanging close to both sides of the cam 31, and an upper surface plate 34b connecting these side plates 34a, 34a. are both upper ends 34
c, 34c are formed one step lower than the middle portion, and both end portions 34c, 34c are attached to the lower surface of the main body A via attachment members D, D. Further, arc-shaped elongated holes 35, 35 of a predetermined length are bored in the side plates 34a, 34a along the outer periphery of the cam 31, and the starting and ending ends thereof are widened outward to form widened portions. 35a, 35a. The width of the elongated holes 35, 35 is formed to be slightly larger than the diameter of the sliding pin 43, which will be described later, except for the widened parts 35a, 35a, and the widened parts 35a, 35a are at least twice the diameter of the sliding pin 43. It is formed to the size of. 36, 36 are both side plates 34a,
Spring locking pin penetration hole drilled in 34a, 3
Reference numerals 7 and 37 indicate notches formed upward from the lower ends of both side plates 34a and 34a.
34a is prevented from coming into contact with the operating shaft 21. 38 is pivotally connected to a support shaft 39 installed between both side plates 34a, 34a, so that one end thereof is connected to the cam 31.
A locking pawl 40 faces the outer peripheral surface of the locking pawl 37, and a locking pawl 40 is between a spring locking pin 41 bored at the other end of the locking pawl 37 and a spring locking pin 42 horizontally suspended between the side plates 34a, 34a. A tension spring tensioned on the locking claw 3
One end of the cam 8 is urged in a direction away from the outer peripheral surface of the cam 31. 43 are both side plates 34a,
A sliding pin inserted through the elongated holes 35, 35 so as to cross between 34a, and a through hole 36 in both side plates 34a, 34a from both ends of the sliding pin and both sides of one end of the locking claw 38,
36 and protrudes outward through the spring locking pin 4
Tension springs 45, 45 are tensioned between the slide pins 4, 44 so that the sliding pin 43 is drawn toward the starting ends of the elongated holes 35, 35. 46 is cam 31
This stopper device is composed of a pin 47 implanted on the outer periphery of the cam 31 and a striking shaft 48 horizontally installed between the side plates 34a, 34a.

With the above structure, when moving furniture, the base of a separately prepared handle H is inserted through the handle insertion hole E opened in the side wall of the underframe B, and the base of the handle H is inserted into the corner shaft portion 21a of the operating shaft 21. After insertion, when the handle H is rocked and the operating shaft 21 is rotated by a predetermined angle in the direction of the arrow, the wires 24, 24 are wound around the drums 23, 23, so that the upper links 5, 5 of the square link mechanism 4 The lower links 6, 6 are pulled downward by the wires 24, 24 on the wheel support 2 side, and the wheel support 2 is moved downward by the operation of this link mechanism 4, and the wheels 3 at the four corners are pulled downward by the wires 24, 24.
is simultaneously moved downward below the bottom surface of the underframe B (Fig. 5). On the other hand, since the cam 31 is rotated by rotating the operating shaft 21, the side plates 34a, 3
The pin 43 passed through the elongated holes 35, 35 of the cam 31 is slid by the protrusion 32 of the cam 31 in the rotating direction of the cam 31 (FIG. 4a). and pin 43
When the locking claw 38 reaches the end of the elongated hole 35, 35, the locking claw 38
Since one end of the is engaged with the protrusion 33, the operating shaft 21
will be prevented from rotating in the opposite direction of the arrow,
The wheels 3 will be held in a downward motion. Therefore, furniture can be moved using the wheels 3 (Fig. 4b).

After moving the furniture, the pin 43 is moved to the cam 31 by swinging the handle H in the same direction as the previous swing direction and further rotating the operating shaft 21 in the direction of the arrow.
The widened portions 35a, 35a at the end of the elongated hole at the protrusion 32 of
After being slid outward, it is pulled toward the starting ends of the elongated holes 35, 35 by the biasing force of the spring 45 (FIG. 4c). As the pin 43 returns to the starting end side of the elongated holes 35, 35 in this manner, the locking pawl 38 is separated from the protrusion 33 by the biasing force of the spring 40, and the operating shaft 2
The rotation prevention in the direction opposite to the arrow 1 is released. Therefore, the wheels 3 are moved upward by the weight of the furniture, and the bottom surface of the underframe B is grounded.

In the above embodiment, the operating shaft 21 is rotated by swinging the handle H, but it may also be rotated by a pedal.

Further, in the above embodiment, the wire winding drum 23 and the wire 2 are connected between each link mechanism 4 and the operating shaft 21.
4, but it is connected by a crank mechanism or other rotational movement transmission mechanism,
It goes without saying that the same implementation can be achieved by transmitting the rotational movement of the operating shaft 21 to each link mechanism 4.

[Effects of the invention] As explained above, in the present invention, the moving wheels can be moved up and down by a link mechanism, and the link mechanism can be operated by rotating the operating shaft, so that the operation is easy. By simply rotating the shaft by a predetermined angle within about half a turn, the moving wheels can be moved downward or upward, and the vertical movement of the wheels can be completed in a short time.

Moreover, since the moving wheels can be moved downward and maintained in the lowered state by simply rotating the operating shaft in one direction, the moving wheels can be moved up and down with a simple operation. Coupled with the fact that the vertical movement can be completed in a short time, it is possible to provide a lifting and moving device that can quickly move furniture.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway enlarged plan view of the same as above, Fig. 3 is an enlarged sectional view of Fig. 2-, Fig. 4 a to c are Fig. 2 −
FIG. 5 is a cross-sectional view taken along a line to explain the operating state of the locking device, and FIG. 5 is a front view of the moving wheels in a lowered state. 1...Casing, 3...Transportation wheels, 4...
Link mechanism, 21... Operating shaft, 23... Rotating motion transmission mechanism (wire winding drum), 24... Rotating motion transmission mechanism (wire), 31... Cam, 32...
...Protrusion for pin sliding, 33...Protrusion for engaging locking claw,
34...Housing, 34a, 34a...Both side plates of housing, 35, 35...Elongated hole, 35a, 3
5a... widened part of elongated hole, 38... locking claw, 40...
...Spring, 43...Sliding pin, 45...Spring, A...
...Furniture body, B...Underframe.

Claims (1)

[Scope of claim for utility model registration] A casing placed at the four corners of the lower part of furniture such as a chest of drawers, and a casing that is attached to each casing via a link mechanism and is provided to move up and down by the operation of this link mechanism. A moving wheel, an operating shaft mounted at the bottom of the furniture in the front-rear direction between the left and right casings, and a link mechanism between the left and right casings that is linked to the rotation of the operating shaft in one direction. a rotary motion transmission mechanism disposed between each of the link mechanisms and the operating shaft so that the movement wheel is moved downward by the operation; The cam is provided with a pin sliding protrusion and a locking pawl engaging protrusion on the outer periphery, and a locking device installed at the bottom of the furniture, and the locking device is provided on both sides of the cam. An arcuate elongated hole of a predetermined length is bored along the outer periphery of the cam in both side plates hanging from the cam, and the starting and ending ends of the hole are widened on the outside to form a widened part of the housing. and a sliding pin inserted into the elongated hole so as to cross between the both side plates of the housing.
a locking pawl that is pivoted between both side plates of the housing so that one end faces the outer peripheral surface of the cam; a spring stretched between the pin and the locking pawl; and a spring that is stretched between the pin and the locking pawl; A furniture lifting and moving device comprising a spring that biases one end of a pawl in a direction away from the outer peripheral surface of a cam.