JP3370631B2 - Spring type biasing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring type urging device, and more particularly to a spring type urging device in which the urging force can be adjusted. It can be used for a device or the like that is operated by urging it with a small force.

[0002]

2. Description of the Related Art FIG. 5 is a side view of a partially cutaway elevating shelf equipped with a spring type biasing device, which is the object of the present invention. This elevating shelf is built into the system kitchen and has a frame (1)
A fixing pin (11) for engaging one end of a spring (15) is planted on the inner wall (13) of the spring, and the other end of the spring (15) is rotated by a support shaft (17). It is connected to a support arm (18) that is rotatably supported, and the tip of the support arm (18) is rotatably connected to a side wall of a lifting case (20) for storing dishes etc. by a pin (19). Has been done. Further, both ends of the auxiliary arm (21) provided in parallel with the support arm (18) have a support shaft (27) and a pin on the inner side wall (13) of the frame (1) and the side wall of the lifting case (20). It is rotatably connected to each other by (29).

In this case, when the elevating case (20) housed in the frame (1) is lowered toward the escape position shown by the arrow in the figure, the spring (15) begins to expand accordingly. . Then, while receiving the upward biasing force from the spring (15), the elevating case (20) slowly descends to ensure the safety of operation, and a part of the load of the elevating case (20) is generated by the spring (15). Since it is received, it can be lowered while supporting the lifting case (20) with a small force. On the other hand, lift the lifting case (20) at the escape position shown by the solid line in the figure
When stored in (1), the urging force of the spring (15) acts as a force to pull up the lifting case (20), which allows the lifting case (20) to be stored in the frame (1) with a small force. It is possible to secure good operability.

[0004]

However, in the above-mentioned conventional apparatus, when the storage amount in the lifting case (20) increases and becomes heavy, a large force is required to lift the lifting case (20) in the escape position. On the other hand, on the contrary, if the storage amount in the lifting case (20) is small and this is light,
When lifting the lifting case (20) in the escape position,
The light lifting case (20) is greatly accelerated by the lifting force and the spring (15), whereby the lifting case (20) is moved to the frame body (1).
There is a risk of suddenly jumping inside and suddenly stopping.

In the above, the lifting case of the lifting rack
In order to ensure the smoothness of the operation of (20), a spring type urging device consisting of a spring (15) etc. was used, but this spring type urging device can smoothly open and close the door of the room or the drawer of the office desk. It can be used for general purposes, for example, to ensure sex.

The present invention has been made in view of the above point, and is a "spring type urging device having a tension spring having one end connected to a fixed wall side and the other end connected to a moving body",
An object is to be able to adjust the urging force that acts on a moving body from a tension spring.

[0007]

[Means for Solving the Problems] [1] The technical means of the present invention for solving the above-mentioned problems is, “The tension spring is attached to a spring hook provided on the fixed wall so as to reciprocate within a certain range. The one end of the spring hook is attached, and a stopper for preventing the movement of the spring hook is retractably provided in the middle of an operation range in which the spring hook moves by being pulled by the moving body through the tension spring. That is, a fixed stopper (33) for preventing the movement of the spring hook is provided at the final position of the operating range ”.

The above technical means operate as follows. The spring hook that supports one end of the tension spring can move within a certain range in the direction of being pulled from the tension spring. Further, the spring hook is designed so that its movement is blocked by either the fixed stopper (33) at the final position of the movable range of the spring or the stopper that appears in the middle of the movable range. The position at which the above-mentioned spring hooking operation is blocked changes depending on whether or not the above is used. Therefore, even if the moving distance of the moving body connected to the other end of the tension spring is the same, the biasing force exerted by the tension spring changes due to the difference in the spring-holding operation blocking position. Therefore, the biasing force acting on the moving body from the tension spring can be adjusted depending on whether or not the stopper is used.

[2] In the above item 1, "The moving body is an ascending / descending case (20) that ascends / descends between a storage position in a frame body (1) of an elevating shelf incorporated in a system kitchen and an escape position therebelow. ) Is connected to the elevating case (20) so as to urge it upward, and the fixed wall is a part of the frame body (1). The force for lifting the lifting case (20) that has escaped to the upper side is complemented by the tension spring, which allows the lifting case (20) to be lifted with a small force. Also, the pulling force (biasing force) acting on the elevating case (20) from the tension spring can be adjusted depending on whether or not the stopper is used, so that the storage amount in the elevating case (20) changes. Even if the weight changes, the pulling force acting on the elevating case (20) from the tension spring can be adjusted to an appropriate value.

[3] In the above item 1 or 2, "the movable body is constantly biased by a second tension spring that exerts a biasing force in the same direction as the tension spring", Since the moving body is biased in the moving direction by the tension spring and the second tension spring different from the tension spring, a larger biasing force can be applied to the moving body. Therefore, even if the weight of the moving body is considerably large, it can be moved with a small force.

[0011]

The inventions of items 1 to 3 have the following unique effects because of the above-mentioned configuration. Since the biasing force exerted by the tension spring changes depending on the position where the movement of the spring hook is blocked, the biasing force acting on the moving body from the tension spring can be adjusted. In the item of item 2, even if the storage amount in the lifting case (20) of the lifting shelf incorporated in the system kitchen changes and the weight changes, the pulling force acting on the lifting case (20) from the tension spring is applied. It can be adjusted to an appropriate value. According to the item (3), since the second tension spring for urging the moving body in the moving direction is added, the moving body can be moved with a small force even when the weight of the moving body is considerably large.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. FIG. 1 is a cross-sectional view showing a state in which the spring-type biasing device of the present invention is incorporated in an elevator shelf incorporated in a system kitchen.

An elevating case (20) enters and exits into the frame body (1) through the front opening (10), and is fixed on both sides of the front opening (10) as described above. Inside wall (1
3) In order to set the operating force necessary for raising and lowering the raising / lowering case (20) to the optimum value on one side (the inner side wall (13) located on the front side with respect to the paper surface in FIG. 1) in FIG. Spring Energizer (41)
Is provided. Further, the pivoting tips of the support arm (18) and the auxiliary arm (21) which are interlocked with the spring type urging device (41) are freely pivotable to the side wall of the lifting case (20) by the pins (19) and (29). Is bound to.

The details of each unit will be described below. [Regarding Frame (1)] The frame (1) has a rectangular chamber (12) for accommodating the elevating case (20), and has a pair of inner sides facing each other in the front-back direction with respect to the plane of FIG. A flat rectangular box-shaped protective cover (31) is attached to one of the inner side walls (13) of the walls (13) (13) (the inner side wall (13) located on the front side in FIG. 1). It is set up.

[Spring-type urging device (41)] The spring-type urging device (41) housed in the protective cover (31).
Is equipped with a rotary plate (43) rotatably supported by a support shaft (40) in the vicinity of a lower portion of the protective cover (31) of the frame body (1), and the rotary plate A spring hooking pin (44) is planted near the turning end of (43). Then, the spring hook pin (4
The first annular hook (150) at the lower end of the spring (15), which is a tension spring, is externally fitted and engaged with 4). The rotary plate (43) can rotate downward until it comes into contact with the contact pin (50).

Second annular hook located on top of spring (15)
(151) is externally fitted and engaged with a spring hooking pin (45) planted in a spring-loaded driven plate (42) described as a matter for specifying the invention, and the driven plate (42) is a support shaft. Protective cover with (47) (31)
And is rotatably attached to the constituent wall of the frame (1). An arcuate notch (48) that opens downward is formed at the lower side of the driven plate (42) near the turning end, and the arcuate notch (48) is formed in the frame body (1) and the protective cover. The pin-shaped fixed stopper (33) planted in the wall of the component (31) is adapted to be disengaged from above, thereby allowing the spring-driven driven plate to rise above the fixed stopper (33). (42) can move.

A movable stopper arm (51) is disposed above the driven plate (42) and the movable stopper arm (51) is attached to the wall of the protective cover (31). Axis
It is rotatably supported by (52). Further, a pin-shaped movable stopper (35) with which the arcuate notch (48) of the driven plate (42) engages is planted in the movable stopper arm (51), and the movable stopper arm (51) is also provided. At the turning tip of (51),
One end of the connecting lever (36) is rotatably connected by a connecting pin (37), and the other end of the connecting lever (36) rotates about a fulcrum shaft (55) in the middle of the longitudinal direction. Rotating arm that moves (5
It is rotatably connected to the upper end of 6) by a connecting pin (38).
Further, the rotation arm (56) is configured to be able to rotate between the rotation range restriction pins (71) and (72) until it hits them.
One end of a biasing force adjusting handle (57) is rotatably connected to a lower end of the rotating arm (56) by a shaft (58), and the shaft (5)
The operation portion (59) at the other end of 8) projects to the outside from an opening (39) formed in the protective cover (31).

[Support Arm (18), Auxiliary Arm (21) and Lift Case (20)] As shown in FIG.
(43) is externally fitted to the first angular shaft portion (49) following the end flange (46) of the support shaft (40) in a non-rotatable state, and at the same time as the first angular shaft portion (49). The columnar part (61) that follows is rotatably pierced through the protective cover (31). A support arm for supporting the lifting case (20) is provided on the second angular shaft portion (62) following the columnar portion (61).
(18) is fitted in a non-rotatable state, and a pressing plate (64) for preventing the support arm (18) from coming out is provided at the tip of the second angular shaft portion (62) with a screw (65). It is fixed at. in this way,
The support arm (18) and the rotary plate (43) are coupled to the support shaft (40) in a non-rotating state, so that the support arm (18) and the rotary plate (43) can rotate integrally. ing. An auxiliary arm (21) parallel to the support arm (18) is rotatably supported by a support shaft (22) on the outer surface of the protective cover (31), and the auxiliary arm (21) and The rotation tip of the support arm (18) is rotatably connected to the side wall of the elevating case (20) by the pins (29) and (19) as in the conventional case.

[Description of Operation] In this case, in the normal state, the elevating case (20) is housed in the rectangular chamber (12) of the frame body (1) (the state shown by the imaginary line in FIG. 1). In the state, the driven plate (42) and the rotary plate (43) are kept in a posture of being rotated upward as shown by an imaginary line. When the lifting case (20) is in the storage state shown by the imaginary line in FIG. 1, when the gripping part (14) provided at the lower end of the lifting case (20) is gripped and pulled down, the rectangular chamber (12 The position of the support arm (18) (held in a substantially vertical position) connected to the side wall of the lifting case (20) shown by the phantom line in () is shown by the solid line in the figure with the support shaft (40) as the fulcrum. Begins to rotate toward. Then, the support arm (18)
To the support shaft (4
(0) rotates integrally with the support arm (18), and further the rotation plate (4) is fitted onto the first angular shaft portion (49) of the support shaft (40) in a non-rotating state.
3) rotates together with the support shaft (40) clockwise from the imaginary line to the solid line. That is, when the support arm (18) in a substantially vertical posture rotates downward, the rotating plate (43) starts to rotate downward from the posture shown by the imaginary line in FIG. 1 in conjunction with this. Then, since the first annular hook (150) at the lower end of the spring (15) is externally engaged with the spring hooking pin (44) of the rotary plate (43), the first hook at the upper end of the spring (15) is engaged. 2 ring hooks (1
The driven plate (42) connected to 51) rotates from the raised position shown by the imaginary line in the figure to the lowered position shown by the solid line. Then, the arcuate notch (48) near the rotating end of the driven plate (42) engages with the fixed stopper (33) from above, and from this time, the spring (15).
Begins to grow. That is, the urging force of the spring (15) causes the lifting case
(20) starts to work in the direction of raising it, and thereafter, the elevating case (20) slowly descends and reaches the position shown by the solid line in FIG. Therefore, when lowering the elevating case (20) housed in the rectangular chamber (12) of the frame (1) to the escape position shown by the solid line in FIG. 1, the elevating case (20) must be supported with a large force. Also, there is no inconvenience that the elevating case (20) moves to the escape position at high speed. When the elevating case (20) descends to the escape position (solid line in FIG. 1), the spring (15) is in a stretched state, and the urging force of the spring (15) is the rotating plate ( 43) → spindle (40) → support arm (18) → lifting case
The force is transmitted through the route (20), whereby the biasing force of the spring (15) acts on the elevating case (20) as a force for raising the elevating case (20).

Next, when the elevating case (20) at the escape position shown by the solid line in FIG. 1 is to be stored, the lower part (14) of the elevating case (20) may be grasped and pushed upward. .
Then spring (15) → rotating plate (43) → spindle (40) → support arm
(18) → The above spring (15) transmitted through the path of the lifting case (20)
The combined force of the urging force of the above and the pushing force applied to the gripping part (14) acts on the lifting case (20), which raises the lifting case (20) and causes the rectangular chamber of the frame (1) to rise. (12) Move to the storage position (the position indicated by the imaginary line in Fig. 1). Therefore, the frame
When returning the lifting case (20) to the storage position in the rectangular chamber (12) of (1), the lifting case (20) should be stored with a light operating force by the action of the biasing force of the spring (15). You can

Next, a measure to be taken when the amount of storage in the elevating case (20) is increased and becomes heavy will be described. In this case, since it is necessary to strengthen the biasing force of the spring (15), in the state of the imaginary line in FIG. 1 in which the elevating case (20) is housed in the rectangular chamber (12) of the frame body (1), Move the biasing force adjustment handle (57) in the direction to pull it out from the protective cover (31). Then,
The rotating arm (56) rotates in conjunction with this, and the connecting lever (36) attached to the upper end pushes the lower end of the movable stopper (35) to move the movable stopper (35) to the vertical position shown in FIG. To Then, the movable stopper (35) is positioned in the rotation region of the arcuate cutout (48) formed in the lower portion of the swinging end of the driven plate (42). In this state, if the lifting case (20) is moved downward so as to escape from the rectangular chamber (12) in the same manner as above,
As described above, the rotary plate (43) rotates clockwise, and the driven plate (42) also starts to rotate clockwise following this. Then, when the arcuate notch (48) of the driven plate (42) engages with the movable stopper (35), the spring (15) starts to extend thereafter.
Accordingly, the spring (15) is engaged with the movable stopper (35) earlier than the case where the driven plate (42) is engaged with the arcuate cutout (48) (in the case of FIG. 1), and the spring (15) is moved up and down ( Since the spring (15) begins to expand from the beginning of descent, the urging force acting on the elevating case (20) from the spring (15) increases. Therefore, even if the amount of storage in the lifting case (20) increases and becomes heavy, the lifting case (20)
It is not necessary to move (20) with great force.

FIG. 4 is a partial cross-sectional view of an elevating shelf equipped with a spring type urging device according to a second embodiment of the present invention. In this one, the second spring (81) (second
It has the same structure as that shown in FIG. 1 except that it is provided with a tension spring). The second spring (81) is composed of a fixed spring hooking pin (82) and a rotating plate (43) which are planted in the protective cover (31).
The second spring (81) is hung on the movable side spring hooking pin (83) that is planted at the same time, and is always kept in the extended state regardless of the position of the elevating case (20). There is. Therefore, in this structure, the contracting force of both the second spring (81) and the spring (15) acts as a force for lifting the lifting case (20), so that the lifting rack of the embodiment described in FIG. The lifting case (20) that is heavier than the lifting case (20) is suitable for moving up and down.

In each of the above embodiments, the spring (15) is provided to facilitate the lifting operation of the lifting case (20) of the lifting shelf.
The spring type urging device is used for general purposes, such as when smoothing the operating force for moving a moving object such as a room door or an office desk drawer. can do. Further, a plurality of movable stoppers (35) (35) may be provided which engage with the arcuate notches (48) of the driven plate (42) at different positions in the rotation range of the driven plate (42).

Further, in the above, the driven plate (42) is a spring.
The movable stopper (35) was used to prevent rotation by being pulled by (15), but the driven plate (42) was set to the spring (15).
The stopper (35) may prevent movement in the direction of being pushed by. In this case, the spring (15) is compressed as the lifting case (20) is lowered. Further, in the above embodiment, the driven plate (42) is configured to rotate about the support shaft (47), but the driven plate (42) linearly reciprocates following the movement of the spring (15). It may be configured.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a lift shelf for explaining an embodiment of the present invention.

FIG. 2 is a cross-sectional view of an arrangement portion of a rotary plate (43) in FIG.

FIG. 3 is a partial cross-sectional view showing a state in which a lifting case (20) is stored in the lifting shelf of FIG.

FIG. 4 is a partial cross-sectional view of a lift shelf for explaining a second embodiment.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols] (1) ・ ・ ・ Frame (15) ・ ・ ・ Spring (20) ・ ・ ・ Lift case

Claims (3)

(57) [Claims] 1. A spring type urging device comprising a tension spring having one end connected to a fixed wall side and the other end connected to a moving body, the spring urging device being provided on the fixed wall so as to reciprocate within a certain range. The one end of the tension spring is attached to the spring hook, and the movement of the spring hook is blocked in the middle of an operation range in which the spring hook moves by being pulled by the moving body via the tension spring. A spring type urging device in which a stopper is provided so as to be retractable, and a fixed stopper (33) for preventing the movement of the spring hook is provided at a final position of the operation range. 2. The spring type urging device according to claim 1, wherein the movable body is between a storage position in a frame body (1) of an elevator shelf incorporated in a system kitchen and an escape position therebelow. Is connected to the lifting case (20) so as to urge the lifting case (20) for lifting up and down, and the fixed wall is a part of the frame body (1) with a spring type. Power device. 3. The spring type urging device according to claim 1, wherein the movable body is a second tension spring that exerts an urging force in the same direction as the tension spring. A spring type biasing device that is constantly biased.