WO2008041544A1

WO2008041544A1 - Assisted drawer device

Info

Publication number: WO2008041544A1
Application number: PCT/JP2007/068539
Authority: WO
Inventors: Soichi Sasaki; Junichiro Iwaki; Takashi Ogata; Kaoru Hoshide
Original assignee: Thk Co., Ltd.
Priority date: 2006-09-27
Filing date: 2007-09-25
Publication date: 2008-04-10
Also published as: DE112007002274B4; CN101516233A; CN101516233B; JPWO2008041544A1; DE112007002274T5; JP5202322B2

Abstract

An assisted drawer device in which, even if it has a closure assistance mechanism (6), a drawer (3) received in a closure position can be easily drawn out, that can be easily handled even by females, and that has excellent operability. The assisted drawer device has a fixed frame body (2), the drawer (3) received in the fixed frame body (2), slide means (4a, 4b) for supporting the drawer (3) so that it can be advanced and retreated relative to the fixed frame body (2), closure assistance means (6) for urging, near the closure position of the drawer (3), the drawer (3) toward the closure position, and opening assistance means (5) for pushingout, against the urging force of the closure assistance means (6), the drawer (3) from the fixed frame body (2).

Description

Specification

Assisted drawer device

Technical field

[0001] The present invention relates to a drawer provided in, for example, various furniture and a system kitchen, etc., and relates to a drawer device with an assist for easily and surely closing and opening the drawer. is there.

Background art

[0002] Conventionally, devices that automatically open and close furniture and drawers in a system kitchen in response to a user's switch operation have been proposed (Japanese Patent Laid-Open No. 2003-189955, Japanese Patent Laid-Open No. 2003-334120, etc.). Specifically, a movable member such as a drawer is arranged so as to be able to advance and retreat with respect to a fixed frame body such as furniture, and a rack is provided along the direction of the advancement and retraction of the movable member with force. A matching gear is provided on the fixed frame body, and the gear is rotated in accordance with a user's switch operation, so that a forward / backward movement according to the rotation direction of the gear is given to the drawer. In addition, as with manually opening and closing the drawer, a measuring device that detects the direction and magnitude of the force is attached to the grip of the drawer gripped by the user so that the user can intuitively operate the switch. The gear is rotated according to the output signal of the measuring device, and the drawer can be automatically opened and closed.

[0003] However, in these devices, the rack and the gear are always in mesh with each other, so when the user opens and closes the drawer by himself without operating the switch, the force and the open / close operation are extremely large. In addition to becoming heavy, when pulling out the drawer from the fixed frame, or when inserting the pulled out drawer into the fixed frame, it is necessary to securely fit the gear and rack, making these operations difficult to perform. End up. In the first place, in recent years, slide rails with a large number of balls interposed between a pair of rails have become widespread as a structure that supports the advance and retreat of drawers, and drawers that use force and slide rails open and close very lightly. There is little need to assist the advancement and retraction of the drawer with the full stroke from the open position to the closed position of the drawer.

[0004] On the other hand, in a drawer that supports opening and closing by a slide rail, the opening and closing operation Therefore, for example, if the fixed frame of the furniture is tilted slightly, the drawer pushed into the closed position opens with its own weight. For this reason, as a slide rail used for this kind of drawer opening and closing support, when the drawer is housed close to the closed position, a closing assist that exerts a force and a biasing force toward the closed position on the drawer. A device having a mechanism has been conventionally known (Japanese Patent Laid-Open No. 2-286102).

[0005] The closing assist mechanism includes a slide piece that is movable along the opening / closing direction of the drawer, a spring that biases the slide piece toward the closing position of the drawer, and the drawer is pushed halfway into the fixed frame. In this case, it is composed of a drive pin that engages with the slide piece. When the drawer is pushed into the fixed frame, it engages with the drive pin force S slide piece and the locked state is released, and the slide piece is pulled by the spring and closed with the drive pin engaged. The slide automatically slides toward the position, and the drawer is urged toward the closed position along with this, and is held in the closed position as it is.

Patent Document 1: Japanese Unexamined Patent Publication No. 2003-189955

Patent Document 2: Japanese Patent Laid-Open No. 2003-334120

Patent Document 3: JP-A-2-286102

Disclosure of the invention

Means for solving the problem

[0006] In recent years, in order to differentiate between products in a system kitchen or the like, there has appeared a high-quality operation when the drawer is closed. Specifically, a damper is built in the auxiliary closing mechanism so that the drawer can be gently stored in the closing position with a gentle movement, so that the biasing force of the spring in the closing direction is attenuated immediately before the closing position. It is configured as follows.

[0007] However, when such a damper is provided, it is necessary to use a somewhat strong spring as the spring in order to stake the damping force of the damper and securely store the drawer in the closed position. I don't get it. For this reason, there is no problem when closing the drawer, but when opening the drawer, the user needs to pull the drawer out of the fixed frame against the urging force of the strengthened spring. The opening action is extremely heavy. There was a bad effect such as In particular, it was a problem to be solved in the system kitchen, etc., where women are frequently used.

[0008] The present invention has been made in view of such problems, and an object of the present invention is to provide a drawer that is stored in the closing position even when a closing assist mechanism is provided. It is an object of the present invention to provide an assisted drawer device that can be easily pulled out from a fixed frame body and is easy to handle even for women.

[0009] In order to achieve the above object, the assisted drawer device of the present invention includes a fixed frame body, a drawer housed in the fixed frame body, and the drawer is moved forward and backward with respect to the fixed frame body. The sliding means to be supported, the closing assisting means for biasing the drawer toward the closing position in the vicinity of the closing position of the drawer, and the drawer by pulling the biasing force of the closing assisting means by operating the start switch. It consists of opening assistance means that pushes out from the fixed frame.

[0010] According to such technical means, even when the urging force of the closing assisting means acts on the drawer, the drawer is easily detached from the closing position by operating the opening assisting means. The drawer can be opened with respect to the fixed frame.

[0011] At this time, since the closing assisting unit operates only in the vicinity of the closing position, the opening assisting unit does not need to press the drawer to the opening position, and the drawer is released from the urging force of the closing assisting unit. It is only necessary to press it to the position where it can be released, that is, the position where the urging force of the closing assist means is released. Thereby, even a woman with weak grip and arm strength can easily pull out the drawer from the closed position to the open position.

[0012] On the other hand, as the opening assisting means, as long as it operates so as to push out the drawer with a fixed frame body force, the specific configuration may be appropriately changed. This is composed of an action arm that is pivotally supported and presses the back plate of the drawer while turning, and a driving means that turns the action arm in response to a switch operation.

[0013] According to such a configuration, when the start switch is operated in a state where the drawer is stored in the fixed frame body and held in the closed position, the driving means turns the working arm, and the working arm is pulled out. Against the biasing force of the closing assist means by pressing the back plate The drawer can be released from the closing position and pushed out of the fixed frame to the open position.

[0014] Also, as a means for pushing out the drawer from the closed position, an action arm that presses the drawer back plate with its tip while turning is used, but this action arm is a slight amount of the back plate of the drawer and the fixed frame body. It is possible to arbitrarily select the distance for pressing the drawer from the closed position by adjusting the force, the length of the working arm and the turning angle. Therefore, even if the closing assist means exerts an urging force against the drawer! /, And the distance is long! /, The installation space for the opening assist means remains space-saving. The stroke pressed by the arm can be set sufficiently long.

[0015] Further, in the case where the drawer is thin, from the viewpoint of providing the opening auxiliary means that does not interfere with the other drawers above and below, the working arm is configured to rotate in a horizontal plane. Is preferred. If comprised in this way, it will become possible to provide the said opening assistance means if it is drawer | drawing out about the thickness of the effect | action arm.

[0016] The detailed configuration of the working arm may be arbitrarily designed as long as the working arm presses the back plate of the drawer by the turning motion. In the initial stage when the drawer starts to move from the closed position, it is necessary to apply a large pressing force to the drawer, and the working arm is rotated to push the drawer to the release position of the closing assisting means. For this, it is necessary to give a certain turning radius to the working arm. For this reason, if a configuration in which the back plate of the drawer is pressed using only the tip of the working arm is employed, a large rotational torque needs to be applied to the working arm.

Accordingly, from the viewpoint of suppressing the necessary rotational torque of the action arm at the beginning of pushing out the drawer while giving the action arm a necessary and sufficient turning radius, while rolling to the back plate of the drawer with respect to the action arm. It is preferable that a pressing curved surface is provided so that a contact area between the pressing curved surface and the back plate of the drawer moves away from the turning center of the working arm as the drawer is pushed out from the closed position. According to such a configuration of the working arm, in the initial stage in which the drawer starts to move to the closing position force, the contact area between the working arm and the back plate of the drawer is the pivot center of the working arm. This makes it possible to exert a sufficient pressing force on the drawer while suppressing the required rotational torque of the working arm close to. Further, as the action arm turns, the contact area between the pressing curved surface and the drawer back plate moves away from the turning center of the action arm, so that the action arm turns give a sufficient pushing stroke to the drawer. It becomes possible.

[0018] In the present invention configured as described above, the start switch may be installed anywhere on the fixed frame or the drawer as long as the user can perform any operation. However, if the operability associated with the opening operation of the drawer is taken into consideration, it is preferable that it is installed on the front surface of the drawer and can be operated in conjunction with the operation of the user placing a hand on the handle of the drawer. Further, since the opening assisting means is provided on the fixed frame body, when the start switch is installed on the drawer, it becomes necessary to perform wiring between the drawer and the fixed frame body. For this reason, from the viewpoint of eliminating the force and the routing of the wiring, it is preferable to transmit the operation of the start sensor to the driving means on the fixed housing side through the light emitting element and the light receiving element.

In addition, the start sensor is not necessarily operated directly by the user. For example, when the user slightly pulls out the drawer from the closed position, the start switch is operated in conjunction with this. It is also possible to configure.

Brief Description of Drawings

FIG. 1 is a side sectional view showing an example of an assisted drawer device of the present invention.

2 is a plan sectional view of the assisted drawer device shown in FIG.

FIG. 3 is a view showing an example of a closing assisting means, showing a state when the drawer is opened.

[FIG. 4] A diagram showing an example of the closing assisting means, showing a state when the drawer is closed.

FIG. 5 is a front view of the drawer device with assist shown in FIG. 1.

6 is a front view showing a fixed frame body in the assisted drawer device shown in FIG. 1. FIG.

FIG. 7 is an enlarged view showing drive means.

FIG. 8 is a view showing another example of the start switch, in which the drawer is set to the closed position. It is side surface sectional drawing which shows a state.

FIG. 9 is a side sectional view showing a state where the drawer is slightly pulled out from the state shown in FIG.

FIG. 10 is a side cross-sectional view showing a state where the working arm is operated from the state shown in FIG.

FIG. 11 is a perspective view showing a second embodiment of the opening assisting means.

FIG. 12 is a side view showing a second embodiment of the opening assisting means.

FIG. 13A is a side view showing a state in which the locking state between the restriction arm and the restriction pin is released in the second embodiment of the opening assisting means.

FIG. 13B is a side view showing a state in which the working arm pushes out the drawer in the second embodiment of the opening assisting means.

FIG. 13C is a side view showing a state in which the working arm pushes out the drawer in the second embodiment of the opening assisting means.

FIG. 13D is a side view showing a state where the working arm is retracted to the home position in the second embodiment of the opening assisting means.

FIG. 13E is a side view showing a state in which the working arm is reset to the home position in the second embodiment of the opening assisting means.

BEST MODE FOR CARRYING OUT THE INVENTION

[0021] The assisting drawer device of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 and FIG. 2 are a side sectional view and a plan sectional view showing a first embodiment of the assisted drawer device of the present invention. This drawer device includes a fixed frame body 2 formed in a box shape, a drawer 3 that is inserted into and removed from the fixed frame body 2 in the horizontal direction of the paper, and the drawer 3 is moved forward and backward with respect to the fixed frame body 2. A pair of slide rails 4a and 4b that are freely supported, a closing auxiliary means that urges the drawer 3 toward the closing position in the fixed frame 2, and a drawer 3 that is piled on the urging force of the closing auxiliary means. Opening auxiliary means 5 pushed out from the fixed frame 2 and force are configured.

[0023] The drawer 3 is supported on the fixed frame 2 via a pair of slide rails 4a and 4b. The slide rails 4a and 4b are, for example, outer rails fixed to the fixed frame 2 side. And an inner rail fixed to the drawer 3 side and a force that does not apply a load between these rails ¾ a large number of balls that roll, and the drawer 3 is attached to the fixed frame 2 with a very light force. It is possible to move forward and backward freely. Regarding the slide rails 4a and 4b, a known slide rail configuration can be appropriately selected and used.

On the other hand, the closing assistance means is incorporated in these slide rails. 3 and 4 show an example of the closing assist means. The closing assisting means 6 includes a guide groove 60 provided in the outer rail 40 on the fixed frame 2 side, a slide piece 61 that moves along the guide groove 60, and the slide piece 61 in the guide groove 60. The spring 62 is always urged toward one end, and the drive pin 63 is provided on the inner rail on the drawer 3 side and engaged with the slide piece 61.

[0025] The guide groove 60 is formed in a slit shape, and includes a sliding portion 60a along the direction of movement of the drawer with respect to the fixed frame, and an arc-shaped engagement provided continuously at one end of the sliding portion 60a. It is comprised from the stop part 60b. The locking portion 60b is provided at the end of the drawer 3 in the opening direction with respect to the sliding portion 60a. On the other hand, the slide piece 61 is provided with a pair of leg portions 61a and 61b that fit into the guide groove 60. The leg portions 61a and 61b are fitted into the guide groove 60, and the guide groove 60 is fitted. It can move freely along. Further, one end of the spring 62 is connected to the slide piece 61, and the other end is fixed to the outer rail 40 at a position displaced from the end portion of the sliding portion 60a in the retracting direction of the drawer 3. Therefore, a biasing force is always applied to the slide piece 61 in the storage direction of the drawer 3 (the left direction in FIG. 3). However, since the guide groove 60 is substantially perpendicular to the direction in which the urging force is applied at the tip of the locking portion 60b, as shown in FIG. 3, one leg portion 6 lb of the slide piece 61 is connected to the locking portion 60b. When positioned at the tip, it is possible to hold the slide piece 61 on the locking portion 60b against the urging force.

Further, the slide piece 61 is cut out with an engagement groove 64 for receiving the drive pin 63, and when the inner rail is advanced and retracted with respect to the outer rail 40, the force and the drive pin 63 are slid. It is configured to be stored in the engagement groove 64 of the piece 61 or to be detached from the engagement groove 64. 3 and 4, the direction of arrow A is the retracting direction of the drawer 3 with respect to the fixed frame 2, and the left end of the guide groove 60 corresponds to the closed position where the drawer 3 is completely stored in the fixed frame 2. Yes. When the drawer 3 is moved from the open position toward the closed position, the drive pin 63 provided on the drawer 3 side moves in the A direction together with the inner rail, and as shown in FIG. 3, the locking portion 60b of the guide groove 60 is obtained. Enter the engaging groove 64 of the slide piece 61 set to. If the drive pin 63 moves in the direction A as it is, the slide piece 61 pressed by the force drive pin 63 is released from the locking portion 60b of the guide groove 60, and as shown in FIG. The sliding portion 60a is moved toward the opposite end by the biasing force of the spring 62. At this time, the position of the slide piece 61 moved from the locking portion 60b to the sliding portion 60a is changed, and the driving pin 63 is held in the engaging groove 34 and changed, and the driving pin 63 is moved to the sliding piece 61. Will move the sliding part 60a. That is, the biasing force of the spring 62 acts on the drawer 3 via the slide piece 60a and the drive pin 63, and the drawer is automatically set to the closed position by the force and the biasing force. Become.

[0027] When the drawer 3 is pulled from the fixed frame 2 and set to the open position, the slide piece 61 is set to the locking portion 60b of the guide groove 60 against the urging force of the spring 62. It is necessary. When the slide piece 61 moves from the sliding portion 60a of the guide groove 60 to the locking portion 60b, its posture changes. When the slide piece 61 reaches the end of the locking portion 60b, the drive pin 63 is engaged with the engagement groove of the slide piece 61. Leave the 64. Thus, as shown in FIG. 3, the slide piece 61 is set to the locking portion 60b against the urging force of the spring 62. That is, when the drawer 3 is pulled out from the fixed frame 2, the slide piece 61 is set to the position shown in FIG. 3, and when stored in the fixed frame 2, the slide piece 61 is engaged with the drive pin 63. The position shown in Fig. 4 will be set.

[0028] Thus, when the closing assisting means 6 is used, the biasing force of the spring 62 acts on the drawer 3 before the drawer 3 is completely pushed into the fixed frame 2, and the user applies the force thereafter. Without additional force, the drawer 3 can be pushed automatically to the closed position. Further, since the urging force acts to hold the drawer 3 in the closed position, it is possible to prevent the inconvenience that the drawer 6 is unintentionally opened due to, for example, a earthquake. These effects become more remarkable as the urging force of the spring 62 is stronger.

[0029] On the other hand, when pulling out the drawer 3 from the fixed frame 2, it resists the urging force of the spring 62. Therefore, the stronger the urging force of the spring 62, the more force is required to open the drawer 3, and the user-friendliness tends to deteriorate. With this force, the drawer device shown in FIG. 1 is provided with the opening auxiliary means 5 and is configured to push out the drawer from the fixed frame body to a position where at least the urging force of the spring 62 of the closing auxiliary means 6 is completely released. is doing.

As shown in FIGS. 1 and 2, the opening assisting means 5 is fixed inside the back plate 20 of the fixed frame 2, and the back plate 20 of the fixed frame 2 and the back plate 30 of the drawer 3. It is located in the space between. The opening assisting means 5 has one end supported by the fixed frame 2 through the rotating shaft 50 and the other end abutting against the back plate 30 of the drawer 3 and the operation of the start switch 52 in accordance with the operation of the start switch 52. It comprises drive means 53 for turning the action arm 51.

[0031] The action arm 51 is provided so as to be able to turn around the rotation shaft 50, and normally, the force held parallel to the back plate 20 of the fixed frame 2 as shown by the solid line in FIG. When an ON signal is input from the start switch 52, it turns to the position indicated by the alternate long and short dash line in FIG. 1 and presses the back plate 30 of the drawer 3 at its tip. A rubber rotating wheel 51a is provided at the tip of the working arm 51 so that the back plate 30 can be pressed smoothly. When the working arm 51 turns, the rotating wheel 51a is pulled out. The rotating wheel 51a comes into contact with 30 and presses the drawer 3 while rotating on the back plate 30.

FIG. 7 is an enlarged view showing details of the driving means. As shown in this figure, the driving means 53 includes a motor 54, a speed reducer 55 that decelerates the rotation of the motor 54 and transmits it to the rotating shaft 50 of the working arm 51, and the motor 54 and the speed reducer 55. It is composed of a torque limiter 56 interposed therebetween. Although not shown in FIG. 7, a control unit 57 for controlling the operation is connected to the motor 54! /. The control unit 57 generates a drive control signal for the motor based on information sent from the start switch 52 and the like, and controls the turning motion of the working arm. In FIGS. 1 and 2, reference numeral 58 denotes a power cord for supplying power to the control unit 57.

[0033] The start switch 52 is incorporated in the handle 31 of the drawer 3, and it is possible to pull the handle 31 forward or press the surface of the handle 31 lightly. Start switch 52 is adapted to emit an on signal. By incorporating the start switch 52 into the handle 31 of the drawer 3 in this way, the operability of the start switch 52 is improved. However, since the working arm 51 and the driving means 53 are mounted on the fixed frame 2, it is necessary to route a signal line between the drawer 3 and the fixed frame 2. Inconveniences such as inability to pull out from 2. For this reason, in the drawer device of this embodiment, the light emitting element 32 connected to the start switch 52 is fixed to the drawer 3, while the light emitting element 32 is opposed to the fixed frame 2 and connected to the control unit 57. The light receiving element 33 is provided so that the ON signal of the start switch 52 can be optically transmitted to the driving means 53.

[0034] When the user presses the start switch 52 in a state in which the drawer 3 is set at the closed position, that is, in a state where the drawer 3 is completely stored in the fixed frame 2, an ON signal of the start switch 52 is emitted from the light emitting element. It is transmitted to the control unit 57 via 32 and the light receiving element 33. When the ON signal of the start switch 52 is input, the controller 57 generates a drive control signal for the motor 54 and sends it to the motor 54. As a result, the motor 54 starts rotating, and the working arm 51 turns by force and rotation. The swinging action arm 51 presses the back plate 30 of the drawer 3 set at the closing position, and exerts a force in the direction of opening the drawer 3 against the urging force of the closing auxiliary means 6. As a result, even when the closing assisting means 6 is provided, the user can easily open the drawer 3.

[0035] In addition, since the drawer 3 is pressed using the swinging action arm 51, the opening assisting means 5 can be configured more compactly than in the case of using a piston rod that moves forward and backward, and the fixed frame Even in a narrow space between the back plate 20 of the body 2 and the back plate 30 of the drawer 3, it is possible to easily install the opening assisting means 5 that exerts force.

[0036] The drive means 53 is provided with a position sensor 34 for detecting whether or not the working arm 51 has rotated to a predetermined angle. When the output signal of the position sensor 34 is inverted, the control unit 57 Immediately stop the rotation of the motor 54, reverse the motor 54, and return the working arm 51 to the initial position, that is, the position indicated by the solid line in FIG. Therefore, when the opened drawer 3 is next pushed into the fixed frame 2, the working arm 51 has already returned to the initial position, and the working arm 51 has moved to the closed position of the drawer 3. There is no hindrance.

[0037] The rotation angle of the action arm 51 is determined according to the distance applied by the urging force of the spring 62 of the closing assisting means 6, that is, the stroke distance of the slide piece 61 and the length of the action arm 51. The If the drawer 3 is pressed at least by the stroke distance of the slide piece 61, the drawer 3 is released from the urging force of the spring 62, and the drawer 3 can be moved lightly by the effect of the slide rails 4a and 4b. .

[0038] On the other hand, if there is an obstacle in front of the drawer 3 and the start switch 52 is accidentally operated, an excessive rotational torque acts on the action arm 51 from the motor 54, and the reduction gear 55 There is a concern that the gear may be damaged or the working arm 51 may be broken. The torque limiter 56 described above is interposed between the motor 54 and the speed reducer 55 in order to avoid such a situation, so that the rotational torque exceeding the set value is not transmitted from the motor 54 to the speed reducer 55. Is configured. Further, in order to avoid a situation in which the drawer 3 is not opened by an obstacle and the motor 54 continues to rotate indefinitely, the control unit 57 is provided with a timer counter. When the motor 54 starts rotating in the direction to open the drawer 3, the control unit 57 counts the value of the timer counter, and when this value reaches a predetermined value, the output signal of the position sensor 34 is inverted. Regardless of the operation, the rotation of the motor 54 is stopped and the working arm 51 is returned to the initial position. As a result, it is possible to protect the opening assistance means 5 from accidents.

[0039] The start switch 52 does not necessarily have to be mounted on the drawer 3. 8 to 9 show other forms of the start switch.

In these drawings, a limit switch 35 for detecting whether or not the drawer 3 is set at the closed position is used as a start switch. The force / curl limit switch 35 is fixed to the rear plate 20 of the fixed frame 2, and the force / curl limit switch 35 is pressed in a state where the drawer 3 is set to the closed position. Therefore, as shown in FIG. 9, when the user places a hand on the handle 31 of the drawer 3 and slightly pulls the drawer 3 out of the fixed frame 2, the pressing state of the limit switch 35 is released at that time, and the The output signal is input to the controller 57. With this as a trigger, the control unit 57 rotates the motor 54, and as shown in FIG. 10, the action arm 51 turns to push the drawer 3 in the opening direction. [0041] In such a configuration, the user first needs to pull out the drawer 3 slightly by himself, but after the output signal of the limit switch 35 is inverted, the action arm 51 pulls out the drawer 3. Since it pushes from behind, the drawer 3 can be easily set from the closed position to the open position against the urging force of the closing auxiliary means 6.

[0042] In the embodiment described with reference to the drawings, the force and turning direction of the working arm 51 set in the up and down direction may be the horizontal direction. When the thickness of the drawer 3 is thin, the installation space of the opening auxiliary means 5 can be saved by matching the turning direction of the action arm 51 with the horizontal direction. In that case, by using a bevel gear in the power transmission path from the motor 54 of the driving means 53 to the working arm 51, the rotation axis of the motor 54 can be aligned in the horizontal direction, and further space saving can be achieved. Is possible.

11 and 12 show a second embodiment of the opening assisting means.

[0044] As in the first embodiment, the opening assisting means 7 is fixed to the inside of the back plate 20 of the fixed frame 2, and the back plate 20 of the fixed frame 2 and the back plate 30 of the drawer 3 are fixed. Used in the space between. The opening assisting means 7 includes a fixed base 70 disposed on the fixed frame 2, an action arm 72 rotatably supported on the fixed base 70 via a rotating shaft 71, and the fixed base 70. A coil spring 75 as an elastic member spanned between a stud 73 standing upright and a stud 74 standing up on the working arm 72, and the working arm against the biasing force of the coil spring. The driving means 76 is configured to be locked at a position (position shown in FIG. 12) and to release the locked state of the action arm 72 in accordance with the operation of the start switch 52.

The stud 74 erected on the working arm 72 is located on the opposite side of the rotating shaft 71 from the distal end portion 72a of the working arm 72, and the coil spring is applied to the force and the stud. By applying the pulling force of the ring 75, the tip 72a of the action arm 72 is turned in the direction of arrow B shown in FIG. Reference numeral 70a in FIGS. 11 and 12 is a stopper that defines the turning end of the action arm 72. The action arm 72 that is turned by the urging force of the coil spring 75 is locked by the stopper 70a. It has been. On the other hand, the driving means 76 includes a restriction pin 76a erected on the back side of the stud 74 in the working arm, and a restriction arm 78 that is rotationally driven by the motor 77 and locks the restriction pin 76a. Constructed! When the start switch 52 is operated, the motor 77 rotates once, disengages the restricting arm 78 from the restricting position shown in FIG. 12, rotates the restricting arm 78 360 degrees, and resets the restricting position again.

[0047] In a state where the motor 77 is stopped, the restriction arm 78 is set to the restriction position shown in FIG. The restricting arm 78 contacts the restricting pin 76a of the action arm 72 at this restriction position, and the force and the pivoting action of the action arm 72 are locked and held at the home position. The restricting arm 78 set at the restricting position is in contact with the outer peripheral surface of the restricting pin 76a at the end of the restricting arm 78 that is not in contact with the restricting pin 76a. For this reason, when the restriction arm 78 starts to rotate by the motor 77, the restriction pin 76a is pushed away from the rotation center of the restriction arm 78, and the locked state of the restriction pin 76a by the restriction arm 78 is released. It has come to be.

[0048] The working arm 72 has a pressing curved surface 72b in contact with the back plate 30 of the drawer 3.

The pressing curved surface 72b comes into contact with the back plate 30 while rolling as the action arm 72 turns and pushes the drawer 3 out of the closed position. In the closed position of the drawer 3 shown in FIG. 12, the contact area is located in the vicinity of the rotating shaft 71 that is the pivot center of the action arm 72, but the action arm 72 pivots in the direction of arrow B and is pulled out. The contact area is configured to approach the distal end portion 72a of the working arm 72 as the frame is pushed out of the fixed frame 2.

FIG. 13A to FIG. 13E show a series of operations of the action arm 72 and the drive means 76 when the opening assisting means 7 in the second embodiment pushes the drawer 3 out of the fixed frame 2. .

[0050] When the drawer 3 is pushed into the fixed frame 2 and is in the closed position, as described with reference to FIG. 12, the working arm 72 is held at the home position. At this time, the restricting arm 78 is set to the restricting position, and the restricting pin 76a is locked against the urging force of the coil spring 75.

[0051] When the start switch 52 is operated from this state, the motor 77 starts to rotate, as shown in FIG. 13A. As shown, the restriction arm 78 connected to the motor 77 turns around the rotation axis of the motor 77 so as to push the restriction pin 76a outward in the radial direction. As a result, the restriction pin 76a gets over the tip of the restriction arm 78, and the locking state of the restriction pin 76a by the restriction arm 78 is released.

[0052] When the locking state of the restriction pin 76a is released, as shown in FIG. 13B, the action arm 72 that has received the biasing force of the coil spring 75 starts to turn around the rotating shaft 71, and the force is applied. The pressing curved surface 72b of the action arm 72 presses the back plate 30 of the drawer 3 along with the turning motion. As a result, an auxiliary force in the direction of pulling out the drawer 3 from the fixed frame 2 acts on the drawer 3.

As shown in FIG. 13A, when the locking state of the regulating pin 76a is released, the contact area 8 between the pressing curved surface 72b of the action arm 72 and the back plate 30 of the drawer 3 is the rotational axis of the action arm 72. 7 Located in the vicinity of 1. However, when the action arm 72 starts to turn, the pressing curved surface 72b comes into contact with the back plate 30 of the drawer 3 while rolling, and as shown in FIG. 13B, the contact area 8 is the tip 72a of the action arm 72. It will move to the direction.

[0054] When the drawer 3 that is stationary at the closed position is pulled out from the fixed frame 2, the force, the force that requires a large force at the start of the pull-out 3, and the contact area 8 is the working arm 72 as described above. If a configuration is adopted in which the directional force from the vicinity of the rotary shaft 71 toward the tip 72a is gradually moved, the force that exerts a large pressing force from the working arm 72 on the drawer 3 at the beginning of the drawer 3 S can. Also, as the working arm 72 pivots and the contact area 8 approaches the distal end 72a of the working arm 72, the pressing force exerted on the drawer 3 by the working arm 72 decreases. Force Only the distance corresponding to the length of the working arm 72 It is possible to apply a pressing force to the drawer.

It should be noted that the configuration of the pressing curved surface 72a of the working arm 72 is not limited to the working arm 72 of the second embodiment, but can be applied to the working arm 51 of the first embodiment. Is possible.

As shown in FIG. 13C, the action arm 72 that has started to turn in this manner and presses the drawer is locked to the stock bar 70a with its longitudinal direction substantially matching the moving direction of the drawer 3. The At this time, the contact area 8 between the pressing curved surface 72b and the back plate 30 of the drawer 3 acts. The arm 72 is located at the tip 72 a. At this time, the drawer 3 is released from the urging force of the spring 62 of the closing assisting means 6, and the user can easily pull the drawer 3 to the open position.

[0057] While the action arm 72 is swiveling in this way, the restriction arm 78 continues to rotate. The restriction pin 76a erected on the action arm 72 is the force at which the restriction arm 78 starts to turn, or the force that is pushed away from the turning range of the restriction arm 78. When the action arm 72 is turned by the biasing force of the coin spring 75, Then, it comes to be located within the turning range of the restriction arm 78 again. For this reason, as shown in FIG. 13D, the restricting arm 78 that has continued to rotate again hits the restricting pin 76a and presses the restricting pin 76a to resist the urging force of the coil spring 75. Push back toward the home position.

[0058] The motor 77 continues to rotate after the restricting arm 78 hits the restricting pin 76a, stops after one rotation, and sets the restricting arm 78 to the first restricting position. That is, the restriction arm 78 is set at the position shown in FIG. 12, and the action arm 72 is returned to the home position accordingly. At this time, the drawer 3 is in a state of being pulled out from the closed position to the open position, and the back plate 30 of the drawer 3 is in a state of being separated from the action arm 72. Accordingly, when the user pushes the drawer 3 into the fixed frame 2 and the closing assisting means 6 is operated, the force and the drawer 3 reach the closing position again, and then the pressing curved surface 72b of the action arm 72 and the back of the drawer 3 are moved. The face plate 30 contacts in the state shown in FIG.

In the opening assisting means 7 shown in the second embodiment, the action arm 72 uses the biasing force of the coil spring 75 as the locking state of the restriction pin 76 a by the restriction arm 78 is released. Since the pressing force is exerted on the drawer 3, the regulating arm 78 and the regulating pin 76a are not engaged at all while the operating arm 72 is exerting the pressing force. Even if the movement to the open position is hindered, no load is applied to the motor 77 that rotationally drives the restriction arm 78. For this reason, it is not necessary to interpose the torque limiter 56 between the operating arm 51 such as the opening assisting means 5 of the first embodiment that transmits the rotation of the motor 54 to the working arm 51 and the motor 54. Further, complicated control of the motor 54 is also unnecessary. Therefore, the opening assistance means 7 of the second embodiment can be configured more compactly and at a lower cost than the opening assistance means 5 of the first embodiment.

Claims

The scope of the claims

[1] A fixed frame body (2), a drawer (3) stored in the fixed frame body (2), and a slide that supports the drawer (3) so as to be movable forward and backward with respect to the fixed frame body (2). By operating the means (4a, 4b), the closing auxiliary means (6) for biasing the drawer (3) toward the closing position in the vicinity of the closing position of the drawer (3), and the start switch (52), A drawer device with assistance, characterized in that it comprises: opening auxiliary means (5) that pushes the drawer (3) out of the fixed frame (2) by staking it against the urging force of the closing auxiliary means (6).

[2] The assisting device according to claim 1, wherein the opening assisting means (5) pushes the drawer (3) from the fixed frame body (2) to a release position of the closing assisting means (6). Extrusion device.

[3] The opening auxiliary means (5) is an action arm (51, 72) that is pivotally supported with respect to the fixed frame (2) and presses the back plate (30) of the drawer (3) while turning. The assisting drawer device according to claim 1, characterized by comprising: and a driving means (53, 76) for turning the working arm (51) in response to an operation of the start switch (52).

[4] The working arm (72) has a pressing curved surface (72b) that comes into contact with the back plate (30) of the drawer (3) while rolling, and the drawer (3) has a closing position force of the closing auxiliary means (6). The contact area between the pressing curved surface (72b) and the back plate (30) of the drawer (3) is moved away from the (72) turning center of the working arm as it is pushed out to the release position. Drawer with assistance as described.

[5] The working arm (51) is connected to the motor (54) of the driving means (53) via a torque limiter (56), and pivots in conjunction with the rotation of the motor (54). The assisted drawer device according to claim 3.

6. The working arm (51) returns to the position before the start switch operation after a predetermined time has elapsed from the start of the turn by the operation of the start switch (52) regardless of the turning angle. Assisted bow I kicking device.

[7] The working arm (71) is constantly urged by the elastic member (75) in the direction of pushing the drawer (3) out of the fixed frame (2), while the drive means (76) is urged by the elastic member (75 ) Against the urging force of () to lock the working arm (72) in the home position corresponding to the closed position of the drawer. The assisting drawer device according to claim 3, wherein the operating arm (72) is released from the locked state in response to an operation of the start switch (52).

[8] The start switch (52) is provided on the front panel of the drawer (3), and the operation of the start switch is transmitted to the driving means on the fixed frame side through the effecting element and the light receiving element. 3. A drawer device with assistance according to 3.

[9] The start switch (52) is a sensor for detecting whether or not the drawer set in the closed position is (3) the closing position force is released, and as the drawer (3) moves toward the open position, The assisted drawer device according to claim 3, wherein the drawer device is operated.