JP3380959B2 - Drawer locking 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 drawer locking device having a pair of locking mechanisms for locking a drawer held in a housing so that the drawer can be taken in and out.

[0002]

2. Description of the Related Art A locking device applied to a drawer that is relatively long in the width direction is designed so that both left and right sides of the drawer are locked at a storage position in order to ensure a locked state of the drawer. I'm trying to lock it so that it doesn't exist. Specifically, the lock mechanism is arranged on each of the left and right sides of the drawer, and an interlocking mechanism composed of a transmission rod and the like is provided on the housing side, and the left and right lock mechanisms are interlocked by this interlocking mechanism. Target.

[0003]

However, when the interlocking mechanism is provided on the housing side, a dedicated space for disposing the interlocking mechanism is required in the housing, which may lead to an increase in size and a reduction in storage space. Occurs. Therefore, it is considered that a transmission rod is arranged in a dead space existing on the back side of the end plate or the like to make effective use of the space. However, in this type, the operating portion for operating the interlocking mechanism, that is, the key portion is provided near the center in the width direction of the drawer, and the left and right locking mechanisms are always driven via this transmission rod. Since it is configured, two mechanisms or the like for converting the movement of the transmission rod into the operation of the lock mechanism are indispensable.
Further, in the case where the width dimension is small and the lock mechanism needs to be attached to only one of the left and right sides, there is a possibility that another lock device must be prepared.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an interlocking mechanism is attached to a drawer for effective use of space, and the number of parts is reduced. However, in order to be able to use a common member for those that only need to attach the lock mechanism to either the left or right side, one lock mechanism is directly driven by the operating part and the other lock mechanism is interlocked. It is designed to be driven through a mechanism.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION That is, in the drawer device according to the present invention, a pair of lock mechanisms that lock the drawer at the storage position on both the left and right sides and lock it so that it cannot be withdrawn, and these lock mechanisms are interlocked. For operating the lock mechanism and the lock mechanism in an unlocked state.One of the lock mechanisms is directly urged by the operation force applied to the operation portion. The other locking mechanism is indirectly urged by the operating force through the interlocking mechanism to operate, and the interlocking mechanism is attached to the drawer. It is characterized by

[0006] With such a structure, the interlocking mechanism can be arranged by effectively utilizing the dead space existing on the back side of the end plate or the like, so that it is possible to provide a compact wagon with a large storage space and the like. Further, since only the other lock mechanism is driven via the interlocking mechanism, the number of parts can be reduced as compared with the conventional one in which any lock mechanism is driven via the interlocking mechanism. Furthermore, because one lock mechanism is directly driven by the operating unit,
For example, it is possible to easily cope with a drawer having a small width dimension and having to attach the lock mechanism only to one of the left and right sides by simply removing the interlocking mechanism and the other lock mechanism.

To arrange the interlocking mechanism specifically, the back side of the end plate is preferable. This is because a dead space is likely to occur between the drawer main body for storing articles and the end plate, and the interlocking mechanism can be arranged in this dead space without difficulty. As a concrete embodiment of the interlocking mechanism, the interlocking mechanism includes a transmission shaft that is pivotally supported by a drawer and extends in the left and right direction, and is biased by an operating force from an operating portion that is fixed to one end of the transmission shaft. And a first bracket that is rotated together with the transmission shaft, and is fixed to the other end of the transmission shaft by the first bracket via the transmission shaft.
And a second bracket that rotates in synchronization with the other bracket and operates the other locking mechanism.

In such a structure, if the transmission shaft becomes long, twisting is likely to occur, and due to this twisting, the operation of the other locking mechanism may become insufficient. In order to reliably solve this point with a simple configuration, when the first bracket and the second bracket are rotated by the same angle, the displacement amount of the portion of the first bracket that receives the operation from the operation unit. Rather, it is preferable to set the displacement amount of the portion of the second bracket for operating the other locking mechanism to be large.

In order to surely rotate the bracket and the transmission shaft together with an extremely simple structure, it is desirable that the transmission shaft has a prismatic shape. In order to reduce the number of parts and simplify the structure, the operating portion is provided with a protrusion that can revolve around an imaginary axis extending forward and backward by a given operating force. It is preferable that the vertical movement due to the revolving rotation is shared by the operation of one lock mechanism and the operation of the interlocking mechanism for driving the other lock mechanism.

Specifically, the first bracket is provided with a pair of cam elements which are arranged at positions deviated from the axis of rotation of the first bracket and which are set so as to sandwich the protrusions vertically. An example is one in which the vertical power generated by the revolving rotation of the projecting element is received by each cam element and converted into the rotation of the first bracket. The lock mechanism moves vertically between the locked position and the unlocked position. The movable element is provided with a pair of engaging elements arranged so as to sandwich the projecting element in the vertical direction. In the locking mechanism, each engaging element receives pressure to convert it into vertical movement of the mover.

In order to surely operate even if some assembly error or manufacturing error occurs, the second bracket is arranged at a portion deviated from the rotational axis of the second bracket and constitutes the other locking mechanism. It is preferable that the second cam element is configured to be separated from the engagement element by a predetermined distance in the unlocked state.

In order to allow the bracket to take a proper initial posture in the unlocked state and prevent rattling of the interlocking mechanism, the first and second brackets in the unlocked state. Is preferably configured such that the side edge of the end plate comes into contact with the back surface of the end plate constituting the drawer. As a concrete embodiment of the lock mechanism, it is possible to lock a plurality of drawers all at once,
An example is one in which when one predetermined drawer is pulled out, all or some of the other drawers cannot be pulled out.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the wagon W with a drawer according to the present embodiment has a rectangular parallelepiped casing W1 having an opening on the front surface, and three upper and lower stages with different vertical dimensions attached to the opening. It has drawers 1A, 1B and 1C.

Each drawer 1A, 1B, 1C is basically
The drawer body 12 has a rectangular parallelepiped shape with an open top surface, and the end plate 11 attached to the front surface of the drawer body 12. The drawer body 12 is provided between the outer surface of each drawer body 12 and the inner surface of the housing W1. It is supported by the housing via the rails so that it can be moved back and forth from the opening to the storage position and the projecting position. Explaining each part in detail, the end plate 11 is, for example, a wooden plate, and a handle 11b is provided on the upper end thereof in the width direction. The drawer main body 12 is made of a thin metal plate as shown in FIG.
a, side wall portion 12b, back wall portion (not shown), and front wall portion 12
It is composed of d. The front wall portion 12d has a rectangular parallelepiped shape that is open to the front and is flat in the depth direction, and also plays a role as a backing member for screwing the end plate 11, and is provided at the front ends of the side wall portion 12b and the bottom wall portion 12a. It is arranged so that the front ends coincide with each other. Further, the side wall portion 12b has an overhang portion oh that overhangs outwardly.
This overhang portion oh is placed and engaged on a rail (not shown).

However, in this embodiment, these drawers 1
A lock device is provided to lock A, 1B and 1C so that they cannot be pulled out. This lock device includes a pair of lock mechanisms 2 and 2 for locking the drawers 1A, 1B and 1C in the storage position at both left and right sides so that they cannot be pulled out, and these lock mechanisms 2 and 2. It is provided with an interlocking mechanism 3 for interlocking and an operating section 4 capable of operating the lock mechanisms 2 and 2 in a locked state and an unlocked state.

First, the lock mechanism 2 will be described. This one has a function of locking all the drawers 1A, 1B and 1C all at once, and one of the middle drawer and the lower drawer 1.
It has a function to prevent the other drawer 1C or 1B from being drawn out when B or 1C is drawn out. Specifically, the housing-side lock portion is provided at the front end portion of the inner surface of the housing W1, and the drawer-side lock portion is provided at the outer surface of each of the drawers 1A, 1B, and 1C. By engaging with the drawer side lock portion, the drawers 1A, 1B and 1C are locked so that they cannot be drawn out.

As shown in FIGS. 3, 6, 7, and 8, the housing-side lock portion is arranged on the rectangular substrate K fixed to the inner side surface of the housing W1 and on the upper end portion of the substrate K. Mover 21 installed
Further, it is provided with two rotating plates 22 arranged above and below the substrate K below the mover 21. Specifically, the mover 21 is disposed at a portion corresponding to the uppermost drawer 1A, and is arranged on the frame H attached to the substrate K in a locked position R (uppermost position) and an unlocked position U (uppermost position). It is supported so as to be vertically movable between the lower and upper positions, and is provided with a pair of upper and lower columnar engaging elements 21a and 21b which are projected inward. On the other hand, each rotating plate 22 is a drawer 1 of the middle stage and the bottom stage.
The parts corresponding to B and 1C are arranged so as to be rotatable along the face plate portion of the substrate K, and extend in the radial direction from the center of rotation so as to open the rotating end side on the surface thereof. A guide groove 22a is provided. The rotation range of the rotation plate 22 is set so that the opening of the guide groove 22a rotates between the upper rear diagonal 45 ° and the upper front diagonal 45 ° when viewed from the rotation center. Further, projections 22b that are projected outward are provided on the back surface of each rotating plate 22.
A string member 23 (for example, a wire) is stretched vertically so as to be attached to 2b. The lower end of the string member 23 is fixed to the substrate K, and the upper end of the string member 23 is elastically biased upward by the spring S so as to be stopped by the vertically movable piece H1 supported by the frame H so as to be vertically movable. It is worn. Then, as shown in FIG. 7, by rotating the one rotating plate 22 forward, the protrusion 22b rotates forward accordingly, and the string member 2
3 is curved and projected forward by that portion so that the upper end of the cord member 23, that is, the vertical moving piece H1 can be pulled down to a position where it cannot move further downward. Therefore, in this state, the other rotating plate 22 is restrained by the cord member 23 and cannot rotate forward. On the other hand, by positioning the mover 21 to the lock position R as shown in FIG. 8, the lock element H movably supported by the frame H is provided.
2 protrudes and engages with the vertical moving piece H1.
Is configured so that it cannot move downward. That is, in this state, the string member 23 is prohibited from sagging, and the rotating plate 2
No. 2 is restrained by the cord member 23 and is in a state of being unable to rotate forward.

In the drawer side lock portion, as shown in FIGS. 3 to 8, in the uppermost drawer 1A, the forward facing surface P provided on the overhang portion oh which constitutes the side wall portion 12b corresponds to this, the middle stage and In the drawers 1B and 1C at the lowermost stage, as shown in FIGS. 4 and 6, the protrusion 24 protruding outward from the side wall portion 12b corresponds to this. The protrusion 24 has an overhang portion o that constitutes the side wall portion 12b.
It is integrally provided on a resin-made projecting support member 24A that is detachably embedded in the h, and is set to be retractable by being elastically biased in the projecting direction.

The operation of the lock mechanism 2 thus constructed will be described. As shown in FIG. 6, drawers 1A, 1
When all of B and 1C are in the storage position, the movable portion 21 is moved to the lock position R by operating the operation portion 4 described later to bring the movable piece 21 into the locked state shown in FIG. The string member 23 is prohibited from slackening due to immobility. As a result, the rotary plate 22 is prohibited from rotating forward, and even if the drawers 1B and 1C in the middle and lower stages are to be pulled out, the protrusion 24 is locked in the guide groove 22a and cannot be pulled out. The top drawer 1A is
Since the engaging elements 21a and 21b that form the mover 21 move upward and the forward facing surface P contacts the engaging elements 21a and 21b, it cannot be pulled out. On the other hand, when the operation section 4 is operated to bring it into the unlocked state and, for example, the drawer 1B in the middle stage is pulled out, the protrusion 2
4 engages with and biases the guide groove 22a to rotate the corresponding rotary plate 22 forward. Then, the cord member 23 is curved and protruded forward only by that portion, and the upper end of the cord member 23 is pulled down to a position where it cannot move further downward. As a result, the other rotating plate 22 is restrained by the string member 23 and cannot rotate forward, and the lower drawer 1C cannot be pulled out. The topmost drawer 1A can be independently withdrawn.

Next, the operation unit 4 will be described. Operation part 4
As shown in FIG. 3 and the like, a columnar base 42 rotatably inserted and supported in a through hole penetrating forward and backward at one end portion of the end plate 11 and a rear end surface of the base 42 are integrated further rearward. And a columnar protrusion 41 that protrudes to the outside. The base body 42 can be rotated by inserting a key (not shown) into a keyhole 42a provided in the front end surface of the operation portion 4 and turning the key. The protrusion 41 is attached to a portion deviated from the axis of the base body 42, which is an imaginary axis, and is rotated around the axis of the base body 42 by rotating the base body 42. However, the rotation range of the lever is approximately 18 from the position where the protrusion 41 reaches the uppermost position to the position where it reaches the lowermost position.
It is set to 0 °.

As shown in FIGS. 5 and 6, the protrusion 41 is inserted so as to be orthogonal to each other between the pair of engaging elements 21a and 21b of the mover 21 constituting the one lock mechanism 2. Yes, one of the lock mechanisms 2 can be directly driven. That is, when the key is turned and the protrusion 41 is revolved and moved upward, the protrusion 41 is slidably engaged with the upper engagement element 21a to lock the mover 21 as shown in FIG. Energize upward to position R. On the other hand, when it is moved downward, the protrusion 41 slides and engages with the lower engagement element 21b to urge the mover 21 downward to the unlocked position U shown in FIG.

In this way, the operating portion 4 directly acts on the one lock mechanism 2 to operate it. Finally, the interlocking mechanism 3 will be described. The interlocking mechanism 3 interlocks the left and right lock mechanisms 2 described above.
Etc., the end plate 11 that constitutes the upper drawer 1A, as shown in FIG.
A transmission shaft 33 that is arranged on the back side of the drawer shaft 12 and that is pivotally supported by the front end portion of the drawer body 12 and that extends left and right; and a first bracket 31 that is fixed to one end of the transmission shaft 33.
The second bracket 32 fixed to the other end of the transmission shaft 33 is provided.

The transmission shaft 33 is, for example, a prismatic elongated member having a square cross section formed by drawing. As shown in FIGS. 9 to 12, the first bracket 31 is a resin integrally molded product, and is a plate-shaped bracket main body 311 arranged so as to be orthogonal to the transmission shaft 33, and the bracket main body 311. Cylindrical shaft portion 312 protruding inward from the inner side surface
And a pair of columnar cam elements 31a, 31b protruding outward from the outer surface of the bracket body 311.

The shaft portion 312 is disposed at a corner portion of the bracket body 311, and has a notch-shaped bearing portion J provided at the front end of the standing side wall which constitutes the front wall portion 12d so as to be opened forward.
K (shown in FIG. 3 etc.) is fitted to pivotally support one end of the first bracket 31 and the transmission shaft 33. However, a fitting hole 3 for fitting one end of the transmission shaft 33 into the inner end surface thereof.
12a is provided. The fitting hole 312a has a square cross-section corresponding to the cross-sectional shape of the transmission shaft 33, and the inner side surface 312b is inclined so that the cross-sectional area increases toward the opening. A groove m is formed on each inner side surface. These structures are for easily and loosely fitting the transmission shaft 33 into the fitting hole 312a.

The pair of cam elements 31a and 31b includes the shaft portion 3
They are arranged at positions displaced from each other by a substantially equal distance from each other, and in the assembled state, they are set so as to sandwich the protrusion 41 from above and below, as shown in FIGS. However, in this embodiment, the movable elements 21 are arranged in front of the engaging elements 21a and 21b. As shown in FIGS. 9 and 13, the second bracket 32 is a resin integrally molded product, and is a plate-shaped bracket main body 321 arranged so as to be orthogonal to the transmission shaft 33, and the bracket main body 321. A resin including a cylindrical shaft portion 322 integrally protruding inward from the inner side surface, and a corrugated plate second cam element 32a integrally protruding outwardly from the outer surface of the bracket body 321. It is made. The bracket main body 321 and the shaft portion 322 have substantially the same shape as that of the first bracket 31 and have the same functions, and thus description thereof will be omitted. The second cam element 32a is for engaging with the pair of engaging elements 21a, 21b constituting the other lock mechanism 2 to move the mover 21 up and down, and is attached to the rotating end of the bracket body 321. In the assembled state, it is shown in FIG.
Etc., it is fitted between the engaging elements 21a and 21b. Then, in the recessed portion, the upper engaging element 21a
Engage to hold. Thus, in the unlocked state, the second cam element 32a is engaged with the engagement elements 21a, 21
It is set so as to be slightly separated from b, and the assembling error and the manufacturing error can be absorbed by this distance. Further, the distance between the arrangement position of the second cam element 32a and the shaft portion 322, to be precise, the second cam element 32a is the engagement elements 21a, 2a.
The distance between the portion engaging with 1b and the center of the shaft portion 322 is set to be larger than the distance between the cam elements 31a and 31b of the first bracket 31 and the center of the shaft portion 312, and FIG. As is apparent from a comparison between FIG. 15 and FIG. 15, a portion that engages with the engagement elements 21a and 21b of the second cam element 32a when the first bracket 31 and the second bracket 32 rotate by the same angle. Vertical displacement of
It is designed to be larger than the vertical displacement of the portions of the cam elements 31a and 31b that engage with the protrusion 41. In this way, the mover 21 in the other lock mechanism 2
The moving distance of the movable element 21 in the one lock mechanism 2 is
The movement amount of the movable element 21 of the other lock mechanism 2 is prevented from becoming small due to the twist of the transmission shaft 33, and the certainty of the operation of the lock mechanism 2 is ensured. I have collateral.

The interlocking mechanism 3 operates as follows.
That is, in the unlocked state in which the drawers 1A, 1B, 1C can be drawn out, as shown in FIGS. 6 and 14, the brackets 31, 32 are respectively attached to the bracket main body 31.
The side edges a and b of the first and the third 312 are brought into contact with the back surface 11a of the end plate 11 and fixed without backlash. When the key is turned from this unlocked state to revolve the protrusion 41 to move it upward, as shown in FIG. 8, the protrusion 41 moves the mover 21 up to the lock position R and locks one of the locks. The mechanism 2 is directly driven into the locked state, and the upper cam elements 31a and 31b forming the first bracket 31 are slidably engaged and pushed upward. As a result, the first bracket 31 rotates so as to move its rotating end upward, and this rotation is transmitted via the transmission shaft 33 to the second bracket 31.
The bracket 32 of is rotated. Then, when the second bracket 32 rotates, as shown in FIG. 15, the second cam element 32a rotates upward and moves the mover 21 of the other lock mechanism 2 to the lock position R.

As described above, when the operation portion 4 is operated by turning the key to change from the unlocked state to the locked state, one lock mechanism 2 is directly operated by the operation portion 4 and the other lock mechanism is operated. 2 is indirectly driven via the interlocking mechanism 3, and locks the left and right sides of the drawers 1A, 1B, 1C at the storage position, respectively, and locks the drawers 1A, 1B, 1C so that they cannot be pulled out. Note that when the key is turned in the opposite direction to change from the locked state to the unlocked state, the operation is the reverse of the above, and the description thereof is omitted.

Therefore, according to this embodiment, since the interlocking mechanism 3 can be arranged by effectively utilizing the dead space existing on the back side of the end plate 11, it is possible to provide a compact wagon W with a large storage space. Further, since only the other lock mechanism 2 is driven via the interlocking mechanism 3, the number of parts can be reduced compared to the conventional one in which any lock mechanism is driven via the interlocking mechanism. Further, since the one lock mechanism 2 is directly driven by the operation unit 4, for example, the width dimension is small, and the interlocking mechanism 3 is used for the drawer in which the lock mechanism 2 only needs to be attached to one of the left and right sides. It is possible to easily deal with this by simply removing the other lock mechanism 2.

Further, the protrusion 41 which constitutes the operating portion 4 is
Since the one lock mechanism 2 and the interlocking mechanism 3 are directly driven, the structure can be simplified and the number of parts can be reduced. The present invention is not limited to the above embodiment. For example, the shape of the transmission shaft is not limited to a quadrangular prism, but may be a hexagonal prism or an octagonal prism. Alternatively, the transmission shaft may be a round bar, and only both ends thereof may be processed into different shapes. Furthermore, the structure of the lock mechanism, the shape of the drawer, etc. may have other configurations.
The lock device according to the above-described embodiment can be applied to drawers used for cabinets and desks other than wagons, and similar effects can be obtained.

Others The present invention is not limited to the illustrated examples, and various modifications can be made without departing from the spirit of the invention.

[0031]

As described in detail above, according to the present invention,
Since the interlocking mechanism can be arranged by effectively utilizing the dead space existing on the back side of the end plate, it is possible to provide a compact wagon with a large storage space and the like. Also,
Since only the other lock mechanism is driven through the interlocking mechanism, the number of parts can be reduced compared to the conventional one in which any lock mechanism is driven through the interlocking mechanism.
Further, since one lock mechanism is directly driven by the operation unit, for example, the width dimension is small, and it is necessary to attach the lock mechanism to only one of the left and right sides. It is possible to easily deal with this by simply removing the mechanism.

To arrange the interlocking mechanism specifically, the back side of the end plate is preferable. This is because a dead space is likely to be formed between the drawer main body for storing articles and the end plate, and the dead space can be effectively used to arrange the interlocking mechanism without difficulty. The interlocking mechanism includes a transmission shaft that is pivotally supported by the drawer and that extends left and right, and a first shaft that is fixed to one end of the transmission shaft and that is biased by an operating force from the operation unit to rotate together with the transmission shaft. It is easy to realize as long as it includes a bracket and a second bracket that is fixed to the other end of the transmission shaft and rotates in synchronization with the first bracket via the transmission shaft to operate the other locking mechanism. Yes, the structure can be simplified.

In the case of such a structure, if the transmission shaft becomes long, twisting is likely to occur, and this twisting may result in insufficient operation of the other locking mechanism. Then, when the first bracket and the second bracket rotate by the same angle, the other lock of the second bracket is larger than the displacement amount of the portion of the first bracket that receives the operation from the operation unit. As long as the displacement of the part for operating the mechanism is set to be large, the above-mentioned points can be reliably solved with a simple configuration, and the proper operation of the other locking mechanism is ensured. it can.

If the transmission shaft has a prismatic shape, the bracket and the transmission shaft can be surely rotated together, and a pultruded product, for example, can be directly used as the transmission shaft, so that an extremely simple construction is possible. Can be realized in. The operating portion is provided with a projecting element that can revolve around a virtual axis extending in the front-rear direction by a given operation force, and the vertical movement due to the revolving rotation of the projecting element causes the operation of one lock mechanism. And the operation of the interlocking mechanism for driving the other lock mechanism, the number of parts can be reduced and the structure can be simplified.

Specifically, the first bracket is provided with a pair of cam elements which are arranged at positions deviated from the rotation axis of the first bracket and which are set so as to sandwich the protrusions in the vertical direction. An example is one in which the vertical power generated by the revolving rotation of the projecting element is received by each cam element and converted into the rotation of the first bracket. The lock mechanism moves vertically between the locked position and the unlocked position. The movable element is provided with a pair of engaging elements arranged so as to sandwich the projecting element in the vertical direction. In the locking mechanism, each engaging element receives pressure to convert it into vertical movement of the mover. With such a structure, the above configuration can be realized by a simple assembly or structure.

The second bracket is provided with a second cam element which is disposed at a portion deviated from the rotational axis of the second bracket and which is engageable with an engaging element which constitutes the other locking mechanism,
If the second cam element is configured to be separated from the engagement element by a predetermined distance in the unlocked state, an assembly error and a manufacturing error related to the second bracket can be allowed to some extent, and the manufacturing cost and the like can be reduced. It will be possible.

In the unlocked state, if the first and second brackets are configured so that their side edges come into contact with the back surface of the end plate constituting the drawer, a proper initial state of the bracket in the unlocked state is obtained. It becomes possible to take a posture, and rattling of the interlocking mechanism can be prevented.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a wagon according to an embodiment of the present invention.

FIG. 2 is a partial perspective view showing the same embodiment.

FIG. 3 is an exploded perspective view showing the locking device of the embodiment.

FIG. 4 is a partial perspective view showing a middle drawer main body of the embodiment.

FIG. 5 is an internal structure diagram showing an upper drawer main body incorporating the locking device of the embodiment.

FIG. 6 is a partial side view showing the internal structure for explaining the operation of the embodiment.

FIG. 7 is a partial side view showing the internal structure for explaining the operation of the embodiment.

FIG. 8 is a partial side view showing the internal structure for explaining the operation of the embodiment.

FIG. 9 is an exploded perspective view showing the interlocking mechanism of the embodiment.

FIG. 10 is a right side view showing the first bracket of the embodiment.

11 is a left side view of FIG.

12 is a cross-sectional view taken along the line AA in FIG.

FIG. 13 is a perspective view showing a second bracket of the same embodiment.

FIG. 14 is a partial side view showing the internal structure for explaining the operation of the embodiment.

FIG. 15 is a partial side view showing the internal structure for explaining the operation of the embodiment.

[Explanation of symbols] 1 ... drawer 11 ... End plate 11a ... rear surface of end plate 2 ... Lock mechanism 21 ... mover 21a, 21b ... Engaging element 3 ... interlocking mechanism 31 ... First bracket 31a, 31b ... Cam elements 32 ... Second bracket 32a ... 2nd cam element 33 ... Transmission shaft 4 ... Operation part 41 ... Projector R ... Lock position U: Non-locked position a, b ... Side edge

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-5-17059 (JP, A) JP-A-6-137010 (JP, A) JP-A-9-215541 (JP, A) Actual Kaihei 6- 65587 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47B 88/00 E05B 65/46

Claims (11)

(57) [Claims] 1. A pair of locking mechanisms capable of locking the drawers at the storage position on both the left and right sides to lock the drawers so that they cannot be withdrawn, an interlocking mechanism for interlocking the locking mechanisms, and a locking mechanism in a locked state. An operation unit operable in an unlocked state, wherein one lock mechanism is directly urged by an operation force applied to the operation unit to operate, and the other lock mechanism is A drawer locking device, which is operated indirectly by being urged by the operation force via the interlocking mechanism, and the interlocking mechanism is provided in association with the drawer. 2. The drawer locking device according to claim 1, wherein the interlocking mechanism is arranged on the back side of the end plate constituting the drawer. 3. An interlocking mechanism includes a transmission shaft pivotally supported by a drawer and extending left and right, and a transmission shaft fixed to one end of the transmission shaft and urged by an operating force from an operating portion to rotate together with the transmission shaft. A first bracket that moves and a second bracket that is fixed to the other end of the transmission shaft and that rotates in synchronization with the first bracket via the transmission shaft to operate the other locking mechanism are provided. The lock device for the drawer according to claim 1. 4. When the first bracket and the second bracket are rotated by the same angle, the other side of the second bracket is larger than the displacement of the portion of the first bracket that receives the operation from the operation section. 4. The drawer device according to claim 3, wherein the amount of displacement of a portion for activating the lock mechanism is set to be large. 5. The drawer locking device according to claim 3 or 4, wherein the transmission shaft has a prismatic shape. 6. The operating portion comprises a protrusion capable of revolving around an imaginary axis extending in the front-rear direction by a given operation force. 6. The drawer locking device according to claim 3, 4 or 5, which is shared by the operation of the lock mechanism of 1 and the operation of the interlocking mechanism for driving the other lock mechanism. 7. The first bracket comprises a pair of cam elements arranged at a position deviated from the axis of rotation of the first bracket and set so as to sandwich the protrusion vertically. 7. The drawer lock device according to claim 6, wherein the vertical power generated by the revolution rotation is applied to each cam element to be converted into the rotation of the first bracket. 8. A lock mechanism is provided with a mover that can move up and down between a locked position and an unlocked position, and the pair of movers are arranged so as to sandwich the projecting element vertically. The engaging element is provided, and the vertical power generated by the revolving rotation of the protrusion is received by each engaging element in one of the lock mechanisms to be converted into the vertical movement of the mover. Drawer locking device. 9. A second bracket is provided with a second cam element which is arranged at a portion deviated from the axis of rotation of the second bracket and is engageable with an engaging element constituting the other locking mechanism. ,
9. The drawer locking device according to claim 8, wherein the second cam element is configured to be separated from the engagement element by a predetermined distance in the unlocked state. 10. The non-locked state, wherein the first and second brackets are configured such that their side edges are in contact with the back surface of the end plate constituting the drawer.
Drawer locking device according to 7, 8 or 9. 11. A lock mechanism is capable of locking a plurality of drawers at a time, and is configured such that when a predetermined drawer is pulled out, all or part of other drawers cannot be pulled out. Claims 1, 2, 3, 4, 5, 6,
Drawer locking device according to 7, 8, 9 or 10.