JP3952933B2 - Drawer lock device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drawer lock device provided with a pair of lock mechanisms that locks a drawer, which is detachably held in a housing, from both left and right sides.
[0002]
[Prior art]
Conventionally, a locking device applied to a drawer that is relatively long in the width direction is configured so that the left and right sides of the drawer are respectively locked in the storage position so that the drawer is locked, so that the drawer cannot be pulled out. It is configured so that it can be locked. Specifically, a lock mechanism is provided on each of the left and right sides of the drawer, and an interlocking mechanism composed of a transmission rod or the like is provided on the housing side, and these left and right lock mechanisms are interlocked by this interlocking mechanism. Is.
[0003]
[Problems to be solved by the invention]
However, when the interlocking mechanism is provided on the casing side, a dedicated space for arranging the interlocking mechanism is required for the casing, which may increase the size and reduce the storage space.
[0004]
Therefore, it is considered that a transmission rod is arranged in the dead space existing on the back side of the end plate and the space is effectively used. This type of bearing is a dedicated bearing member for supporting the transmission rod. And the like are attached to the drawer, so that the number of parts is increased and the assembly is complicated. In addition, the bearing member may occupy space unnecessarily.
[0005]
[Means for Solving the Problems]
The present invention has been made in view of such problems, and is provided with an interlocking mechanism on the drawer side in order to make effective use of space, while reducing the number of parts of the interlocking mechanism and simplifying the structure and assembly. In order to achieve this, the transmission rod constituting the interlocking member is pivotally supported by the pivotal support portion formed by utilizing the side wall which is a part of the drawer, via the operation member which is attached to both ends and interlocked with the lock mechanism. It is a thing.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
That is, the drawer lock device according to the present invention includes a pair of lock mechanisms that can lock the drawer in the storage position on both the left and right sides so that it cannot be pulled out, and an interlock mechanism for interlocking these lock mechanisms. The lock mechanism includes an operation unit that can be operated in a locked state and an unlocked state, and an interlocking mechanism is attached to each end of the transmission shaft and a transmission shaft that is rotatably provided in the drawer. And a pair of actuating members that rotate in conjunction with the respective locking mechanisms, wherein the actuating member is provided at pivot portions formed on the left and right side walls of the drawer at both end portions thereof. By pivoting directly, the drawer can be pivoted The operating portion directly drives one actuating member and one lock mechanism corresponding thereto by a given operating force, and indirectly connects the other lock mechanism via an interlocking mechanism. To drive It is characterized by that.
[0007]
In such a case, since the interlocking mechanism can be arranged by effectively using the dead space existing on the back side of the end plate, a compact wagon with a drawer with a large storage space can be provided. Further, since the pivot portion is formed by using the side wall of the drawer, a dedicated bearing or the like can be eliminated, and the arrangement space and the number of parts can be reduced, or the assembly can be simplified. Further, in such a configuration, a sleeve or the like is required to support the transmission shaft on the pivot portion because the pivot portion is formed by using the side wall of the drawer. Since the pivot member can be directly pivotally supported and the operating member can also serve as a sleeve, a sleeve or the like is not required, and the number of parts can be reduced as much as possible. Moreover, since the transmission shaft is indirectly supported, it is not necessary to make the cross-sectional shape circular, and the degree of freedom in design can be improved. In addition, since the operating member that exchanges force with the lock mechanism is pivotally supported, the pivoted part and the part on which the force acts can be brought close to each other, so that the working member can be stably rotated. It is possible to improve the reliability of the operation of the locking device.
[0008]
In the case where the drawer includes a drawer main body for storing articles and an end plate provided on the front surface of the drawer main body, a dead space is likely to occur between the drawer main body and the end plate. In order to effectively utilize this dead space and arrange the interlocking mechanism, it is preferable that the pivotal support portion is a bearing hole that is provided through the front end portion of the side wall of the drawer main body to the left and right. If the member is made of a resin integrally including a shaft portion that is rotatably fitted in the bearing hole, it is possible to effectively suppress sliding noise and the like generated between the bearing hole and the shaft portion. become able to.
[0009]
In order to facilitate the mounting operation of the operating member to the bearing hole, an insertion groove is provided in the front end of the drawer body so as to be continuous with the bearing hole, and the shaft portion of the operating member is inserted into the bearing hole from this opening. It is preferable that the actuating member be configured not to be removable from the opening by attaching an end plate and closing the opening.
[0010]
Further, in order to effectively suppress the movement of the actuating member in the left-right direction, flanges projecting in the radial direction from the shaft are provided, and these collars are brought into contact with the inner surface of the side wall of the drawer body so as to move outward of the actuating member. Those which are prohibited from being removed are suitable.
[0011]
In order to reliably rotate the actuating member and the transmission shaft together with an extremely simple configuration, it is desirable that the transmission shaft be a prismatic shape.
[0012]
In order to make each actuating member take an appropriate initial posture in the unlocked state and to prevent rattling of the interlocking mechanism, etc., in the unlocked state, each actuating member is on the back side of the end plate constituting the drawer. What is comprised so that an edge may contact | abut is preferable.
[0013]
As a specific embodiment, the operating unit directly drives one actuating member and one corresponding locking mechanism by a given operating force, and the other locking mechanism is connected via an interlocking mechanism. A configuration in which driving is indirectly performed can be given.
[0014]
In such a configuration, if the transmission shaft becomes longer, twisting is likely to occur, and the operation of the other lock mechanism may be insufficient due to this twisting. In order to reliably solve this problem with a simple configuration, when one operating member and the other operating member rotate by the same angle, the amount of displacement of the portion of the one operating member that receives the operation from the operating unit is received. Rather, it is preferable to set the displacement amount of the part for operating the other locking mechanism in the other operating member to be larger.
[0015]
In order to simplify the structure of the operation unit, the operation unit includes a protrusion that can revolve around a virtual axis that extends back and forth by a given operation force. It is preferable that the vertical movement due to the above is shared by the operation of one lock mechanism and the operation of the interlocking mechanism for driving the other lock mechanism.
[0016]
As a specific structure of the operating member and the lock mechanism that can suitably correspond to such an operation unit, one operating member is disposed at a position displaced from the rotation axis and sandwiches the protrusions vertically. A pair of cam elements set in the above, and the vertical power generated by the revolving rotation of the projecting element is received by each cam element and converted into the rotation of one operating member. The mechanism includes a movable element that can move up and down between a locked position and an unlocked position, and the movable element includes a pair of engaging elements disposed so as to sandwich the protrusion vertically. The vertical power generated by the revolving rotation of the projecting element is received by each engaging element in one lock mechanism and converted into the vertical movement of the movable element.
[0017]
In order to ensure that it can be operated even if a certain degree of assembly error or manufacturing error occurs, the other operating member is disposed at a position deviated from the pivot axis and is engaged with the other locking mechanism. It is desirable that the second cam element be engageable with the element, and that the second cam element be separated from the engagement element by a predetermined distance in the unlocked state.
[0019]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0020]
As shown in FIGS. 1 and 2, the wagon W with drawer according to the present embodiment has a rectangular parallelepiped housing W1 having an opening on the front surface and three upper and lower tiers with different vertical dimensions attached to the opening. Drawers 1A, 1B, 1C are provided.
[0021]
Each of the drawers 1A, 1B, and 1C basically includes a rectangular parallelepiped drawer body 12 having an upper surface opened, and an end plate 11 attached to the front surface of the drawer body 12. Via a rail (not shown) provided between the inner surface of the housing W1, the housing is supported by the housing so that it can be inserted and removed from the opening to the front and back between the storage position and the protruding position. If each part is explained in full detail, the end plate 11 will be a wooden plate shape, for example, and the handle 11b is provided in the upper end over the width direction. As shown in FIG. 3, for example, the uppermost drawer body 12 includes a bottom wall 12a made of a thin metal plate, a side wall 12b, a back wall (not shown), and a backing member 12d that forms a front wall. Yes. The backing member 12d has a rectangular parallelepiped shape that opens in the depth direction and opens to the front, and the face plate portion 12d1 that rises is provided with a screw insertion hole N and is used when the end plate 11 is screwed. Further, the standing side wall 12d2 and the lower wall 12d3 are arranged so that the front ends thereof substantially coincide with the front ends of the side wall 12b and the bottom wall 12a of the drawer body 12. Further, an overhang portion oh that overhangs further outward is attached to the side wall 12b, and the overhang portion oh is placed and engaged on a rail (not shown).
[0022]
Therefore, in this embodiment, a lock device is provided that locks the drawers 1A, 1B, and 1C so that they cannot be pulled out. This locking device includes a pair of lock mechanisms 2 and 2 for locking the drawers 1A, 1B and 1C in the storage position so that they cannot be pulled out and locked on both the left and right sides, and the lock mechanisms 2 and 2 An interlocking mechanism 3 for interlocking and an operation unit 4 capable of operating the lock mechanisms 2 and 2 in a locked state and an unlocked state are provided.
[0023]
First, the lock mechanism 2 will be described. The lock mechanism 2 has a function of locking all the drawers 1A, 1B, 1C all at once, and the other drawer 1C or 1C in the state where either the middle drawer or the lower drawer 1B or 1C is pulled out. And a function for preventing 1B from being pulled out. Specifically, it includes a housing side lock portion disposed at the front end of the inner surface of the housing W1 and a drawer side lock portion disposed on the outer surface of each drawer 1A, 1B, 1C. And the drawer-side lock portion are engaged to lock the drawers 1A, 1B, and 1C so that they cannot be pulled out.
[0024]
As shown in FIGS. 3 and 6 to 9, the housing-side lock portion includes a rectangular substrate K fixed to the inner surface of the housing W <b> 1 and a mover 21 disposed on the upper end portion of the substrate K. And two rotating plates 22 disposed 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 positioned above the frame H attached to the substrate K and non-positioned below. It is supported so as to be movable up and down with respect to the lock position U (lowermost position), and includes a pair of upper and lower columnar engaging elements 21a and 21b protruding inward. Note that the lock position R and the non-lock position U are structured to have a certain range of width in the vertical direction. On the other hand, each rotating plate 22 is disposed so as to be able to rotate along the face plate portion of the substrate K at a portion corresponding to the middle and lowermost drawers 1B and 1C. Is provided with a guide groove 22a extending in the radial direction from the center of rotation. The rotation range of the rotation plate 22 is set so that the opening of the guide groove 22a rotates between an upper rear oblique 45 ° and an upper forward oblique 45 ° as viewed from the rotation center. Further, projections 22b projecting outward are provided on the back surfaces of the respective rotating plates 22, and string members 23 (for example, wires) are stretched up and down so as to be in contact with these projections 22b. The lower end of the string member 23 is fixed to the substrate K, and the upper end thereof is elastically biased upward by the spring S and is stopped by a vertical moving piece H1 supported by the frame body H so as to be movable up and down. It is worn. Then, as shown in FIG. 7, by rotating one rotating plate 22 forward, the protrusion 22b rotates forward along with it, and the string member 23 is curved and protrudes forward only by that portion. The upper end of the member 23, that is, the vertically moving piece H1 is pulled down to a position where it cannot move further downward. Therefore, in this state, the other rotating plate 22 is restrained by the string member 23 and cannot be rotated forward. On the other hand, when the movable element 21 is positioned at the lock position R as shown in FIG. 8, the lock element H2 supported so as to be movable on the frame H protrudes and engages with the vertical moving piece H1. The frame H1 is configured not to move downward. That is, in this state, the string member 23 is prohibited from sagging, and the rotating plate 22 is inhibited by the string member 23 and cannot be rotated forward.
[0025]
As shown in FIGS. 3 to 9, the drawer-side lock portion corresponds to the forward-facing surface P provided in the overhang portion oh in the uppermost drawer 1A, and in the middle and lowermost drawers 1B and 1C. As shown in FIGS. 4, 6 and the like, the protrusion 24 protruded outward from the overhang portion oh corresponds to this. The protrusion 24 is provided integrally with a resin-made protrusion support member 24A that is detachably embedded in the side surface of the overhang portion oh, and is elastically biased in the protruding direction. It is set to be immersive.
[0026]
The operation of the lock mechanism 2 configured as described above will be described. As shown in FIG. 6, from the state where all the drawers 1A, 1B, and 1C are in the storage position, the operation unit 4 described later is operated to move the movable element 21 to the lock position R, and the locked state shown in FIG. If it does so, the up-and-down moving piece H1 will be in a state which cannot be moved down, and the string member 23 is prohibited from sagging. As a result, the rotating plate 22 is prohibited from rotating forward, and even if it is attempted to pull out the middle and lower drawers 1B and 1C, the protrusion 24 is locked to the guide groove 22a and cannot be pulled out. Further, the uppermost drawer 1A cannot be pulled out because the engaging elements 21a and 21b constituting the movable element 21 move upward and the forward-facing surface P abuts against the engaging elements 21a and 21b. On the other hand, after the operation unit 4 is operated to be in an unlocked state, for example, when the middle drawer 1B is pulled out, the protrusion 24 engages with the guide groove 22a in the process and urges it to respond. The rotating plate 22 is rotated forward. Then, the string member 23 is curved and protrudes forward by that portion, and is pulled down to a position where the upper end of the string member 23 cannot move further downward. As a result, the other rotating plate 22 is restrained by the string member 23 and cannot be rotated forward, and the lower drawer 1C cannot be pulled out. The uppermost drawer 1A can be taken in and out independently.
[0027]
Next, the operation unit 4 will be described. As shown in FIG. 3 and the like, the operation unit 4 further includes a columnar base 42 that is rotatably inserted and supported in a through hole that passes through one end of the end plate 11 in the front-rear direction, and a rear end surface of the base 42. And a columnar protrusion 41 integrally protruding rearward. The base body 42 can be rotated by inserting a key (not shown) into a key hole 42 a provided on the front end surface of the operation unit 4 and turning it. The protrusion 41 is attached to a portion deviated from the axis of the base body 42 as a virtual axis, and is rotated around the axis of the base 42 by rotating the base 42. Therefore, the rotation range is set to approximately 180 ° from the position where the protrusion 41 reaches the uppermost position to the position where the protruding element 41 reaches the lowermost position.
[0028]
As shown in FIGS. 5 and 6 and the like, the protrusion 41 is fitted so as to be orthogonal between the engaging elements 21a and 21b forming a pair of the movable elements 21 constituting the one locking mechanism 2. The lock mechanism 2 can be directly driven. That is, when the key 41 is turned to cause the protrusion 41 to revolve and move upward, the protrusion 41 engages while sliding on the upper engagement element 21a, and the movable element 21 is locked as shown in FIG. Energize up to position R. On the other hand, when it is moved downward, the protrusion 41 engages while sliding on the lower engagement element 21b to urge the movable element 21 downward to the unlocked position U shown in FIG.
[0029]
In this way, the operation unit 4 directly acts on one lock mechanism 2 to operate it.
[0030]
Finally, the interlocking mechanism 3 will be described. This interlocking mechanism 3 interlocks the left and right locking mechanisms 2 described above, and is arranged on the back side of the end plate 11 constituting the upper drawer 1A as shown in FIGS. 3, 5, 9, 10 and the like. And a transmission shaft 33 extending in the left-right direction, one operating member 31 fixed to one end of the transmission shaft 33, and the other operating member 32 fixed to the other end of the transmission shaft 33.
[0031]
In this embodiment, the operating members 31 and 32 are pivotally supported in bearing holes JK that are pivotal portions formed at the front end portion of the drawer body 12, and the transmission shaft 33 is interposed via the operating members 31 and 32. The main body 12 is pivotally supported by the drawer body 12.
[0032]
As shown in FIG. 3 and the like, the bearing hole JK is provided through the front half of the side wall 12b constituting the drawer body 12 and the lower half of the standing side wall 12d2 of the backing member 12d attached to the inner surface thereof. In the present embodiment, an insertion groove SM that is continuous with the bearing hole JK and opens at the front end of the drawer body 12 is provided.
[0033]
The transmission shaft 33 is disposed so as to penetrate the backing member 12d to the left and right, and is, for example, an elongated prismatic member having a square cross section formed by extrusion.
[0034]
As shown in FIGS. 10 to 13, one actuating member 31 is an integrally molded product made of resin, a plate-like actuating member main body 311 disposed so as to be orthogonal to the transmission shaft 33, and the actuating member main body. A columnar shaft portion 312 that protrudes inward from the inner surface of 311 and a pair of columnar cam elements 31 a and 31 b that protrude outward from the outer surface of the operation member main body 311 are provided.
[0035]
The actuating member main body 311 is set so that the side edge “a” abuts against the back surface 11 a of the end plate 11 in the unlocked state. The pivot end is pivoted upward about a shaft portion 312 disposed at the upper end of the side edge a so as to reach a locked state.
[0036]
As described above, the shaft portion 312 is disposed at a corner portion corresponding to the upper end portion of the side edge a of the operating member main body 311 and has a diameter that fits in the bearing hole JK (shown in FIG. 3 and the like). Have. The inner end portion and the outer end portion are respectively provided with flange portions 313 and 314 for suppressing the left and right rattling of the operating member 31 fitted in the bearing hole JK. The left and right separation distances of the flange portions 313 and 314 are set to be the same as or slightly larger than the dimension in which the thicknesses of the side wall 12b and the standing side wall 12d2 of the backing member 12d are combined. Further, an insertion hole 312a for removably inserting one end portion of the transmission shaft 33 is provided on the inner end surface thereof. The insertion hole 312a has a square shape 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 as it approaches the opening. Further, a groove m is formed on each inner side surface. These structures are for easily and easily fitting the transmission shaft 33 into the fitting hole 312a.
[0037]
The pair of cam elements 31a and 31b are arranged at positions displaced from the shaft portion 312 by substantially equal distances, and in the assembled state, as shown in FIGS. It is set to pinch. Accordingly, in this embodiment, the movable element 21 is disposed in front of the engaging elements 21a and 21b.
[0038]
As shown in FIGS. 10 and 14, the other actuating member 32 is an integrally molded product made of resin, a plate-like actuating member main body 321 disposed so as to be orthogonal to the transmission shaft 33, and the actuating member main body. A cylindrical shaft portion 322 that integrally protrudes inward from the inner surface of 321, and a corrugated second cam element 32 a that integrally protrudes outward from the outer surface of the operating member main body 321. It is made of resin. The actuating member main body 321 and the shaft portion 322 have substantially the same shape as that of the one actuating member 31 and have the same functions, and thus description thereof is omitted. The second cam element 32 a is for engaging the pair of engagement elements 21 a and 21 b constituting the other lock mechanism 2 to move the movable element 21 up and down. In the assembled state, as shown in FIG. 15 and the like, it is fitted between the engaging elements 21a and 21b. And it engages so that it may hold in the upper engaging element 21a in the recessed part. Thus, in the unlocked state, the second cam element 32a is set so as to be slightly separated from the engaging elements 21a and 21b, so that an assembly error and a manufacturing error can be absorbed by this distance. In addition, the distance between the arrangement position of the second cam element 32a and the shaft portion 322, more precisely, the distance between the portion where the second cam element 32a engages with the engaging elements 21a and 21b and the center of the shaft portion 322, One operating member 31 is set so as to be larger than the distance between the cam elements 31a, 31b and the center of the shaft portion 312 in one operating member 31, and as apparent from comparing FIG. 8 and FIG. When 31 and the other actuating member 32 rotate at the same angle, the vertical displacement amount of the portion of the second cam element 32a that engages with the engaging elements 21a and 21b is related to the protrusion 41 of the cam elements 31a and 31b. It is designed to be larger than the amount of vertical displacement of the part to be joined. In this way, the moving distance of the movable element 21 in the other locking mechanism 2 is made larger than the moving distance of the movable element 21 in the one locking mechanism 2, and the other locking mechanism is caused by the twist of the transmission shaft 33. The moving amount of the mover 21 of the mechanism 2 is prevented from becoming small, and the certainty of the operation of the lock mechanism 2 is ensured.
[0039]
In the interlocking mechanism 3, the operating members 31 and 32 are attached to the respective end portions of the transmission shaft 33, and then the shaft portions 312 and 322 of the operating members 31 and 32 are fitted from the openings of the insertion grooves SM, and the end plate 11 is pulled out. 12 and is assembled by closing the opening. In this state, the actuating members 31 and 32 are prohibited from dropping from the opening by the end plate 11, and are prevented from coming off to the left and right by the flange portions 313 and 314 or 323 and 324. And it operates as follows. That is, in the unlocked state in which the drawers 1A, 1B, and 1C can be pulled out, as shown in FIGS. 6 and 15, the operating members 31 and 32 respectively connect the side edges a and b of the operating member bodies 311 and 321 to the end plate. 11 is brought into contact with the back surface 11a of the eleventh, and is fixed without any difficulty. From such an unlocked state, when the key 41 is turned and the protrusion 41 is revolved and moved upward, the protrusion 41 moves the movable element 21 to the lock position R as shown in FIG. One of the locking mechanisms 2 is directly driven to be in a locked state, and is engaged with the upper cam elements 31a and 31b constituting the one operating member 31 while sliding, and is pushed up. As a result, one actuating member 31 is pivoted to move its pivot end upward, and this pivot is transmitted via the transmission shaft 33 to pivot the other actuating member 32. When the other operating member 32 rotates, the second cam element 32a rotates upward as shown in FIG. 16, and the mover 21 of the other lock mechanism 2 is moved up to the lock position R.
[0040]
As described above, when the operation unit 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 unit 4 and the other lock mechanism 2 is interlocked. Driven indirectly through the mechanism 3, the left and right sides of the drawers 1A, 1B, and 1C are locked at the storage position, and the drawers 1A, 1B, and 1C are locked so that they cannot be pulled out. Note that when the key is turned reversely to change from the locked state to the unlocked state, the operation is opposite to that described above, and the description thereof is omitted.
[0041]
Therefore, according to the present embodiment, since the dead space existing on the back side of the end plate 11, specifically, the space in the backing member 12d for attaching the end plate 11 can be used effectively, the interlocking mechanism 3 can be disposed. It is possible to provide a wagon W with a drawer that is compact and has a large storage space. Further, since the bearing hole JK is formed by penetrating the side wall 12b of the drawer body 12, a dedicated bearing or the like can be eliminated, and the number of parts can be reduced and the assembly can be simplified. Furthermore, since the operation members 31 and 32 are made of resin and the shaft portions 312 and 322 also serve as a sleeve, it is possible to effectively suppress sliding noise and the like related to rotation. Further, since the cross-sectional shape of the transmission shaft 33 is not required to be circular, the transmission shaft 33 can be a prismatic type as in this embodiment, and the operating members 31 and 32 and the transmission shaft 33 Can be easily connected so as to rotate together. In addition, since the operating members 31 and 32 that exchange force with the lock mechanism 2 are pivotally supported, the pivotal part and the part where the force acts are close to each other, and an unreasonable force is exerted on the pivotal part. It is difficult to apply, and it is possible to make a structure that is not easily affected by bending, manufacturing, and assembly errors of members. As a result, the rotational smoothness of the operating members 31 and 32 can be improved, and as a result, the reliability of the operation of the locking device and the improvement of the service life can be achieved.
[0042]
In addition to this, the present embodiment has various effects. For example, since the insertion groove SM is provided and the shaft portions 312 and 322 of the operating members 31 and 32 are inserted into the bearing holes JK from the openings and assembled, the assembling work of the interlocking mechanism 3 is facilitated. Further, since the movement of the operating members 31 and 32 in the left-right direction is restricted by the flange portions 313 and 314 or 323 and 324, the rotation operation is good and the amount of play is small.
[0043]
In the unlocked state, each of the operating members 31, 32 is configured to abut the side edge a against the back surface of the end plate 11 constituting the drawer 1A. An appropriate initial posture can be taken, and rattling of the interlocking mechanism can be prevented.
[0044]
Further, since one of the lock mechanisms 2 is directly driven by the operation unit 4, for example, the width dimension is small, and the interlocking is performed with respect to a drawer that only needs to be attached to one of the left and right sides. It is possible to easily cope with this by simply removing the mechanism 3 and the other lock mechanism 2.
[0045]
Moreover, since the protrusion 41 which comprises the operation part 4 drives directly one locking mechanism 2 and the interlocking mechanism 3, a structure can be simplified and the number of parts can also be reduced.
[0046]
In addition, this invention is not limited to the said Example. For example, the shape of the transmission shaft may be not only a quadrangular column but also a hexagonal column, an octagonal column, or the like, or a round bar may be processed into an irregular shape only at both ends. Furthermore, the structure of the lock mechanism, the shape of the drawer, etc. may be other configurations, and even if the lock device according to the above embodiment is applied to a drawer used for a cabinet or a desk other than a wagon, the same effect is obtained. Can be played.
[0047]
In addition, the present invention is not limited to the illustrated examples, and various modifications can be made without departing from the spirit of the present invention.
[0048]
【The invention's effect】
As described above in detail, according to the present invention, since the interlocking mechanism can be arranged by effectively using the dead space existing on the back side of the end plate, a compact wagon with a drawer with a large storage space can be provided. Further, since the pivot portion is formed by using the side wall of the drawer, a dedicated bearing or the like can be eliminated, and the arrangement space and the number of parts can be reduced, or the assembly can be simplified. Further, in such a configuration, a sleeve or the like is required to support the transmission shaft on the pivot portion because the pivot portion is formed using the side wall which is a part of the drawer. According to the present invention, since the transmission shaft directly supports the operating member at the pivotal portion formed on the drawer side wall at both ends thereof, the operating member also serves as a sleeve. In addition to eliminating the need for a sleeve and the like, it is also possible to eliminate the need for a dedicated bearing and the like, and the number of parts can be reduced as much as possible and the assembly can be simplified. In addition, the cross-sectional shape of the transmission shaft does not need to be circular, and the degree of design freedom can be improved. In addition, since the pivot part directly pivots the operating member that transmits and receives force to and from the lock mechanism, it becomes easy to bring the pivot part and the part where the force acts close to each other. It is possible to make the structure difficult to be subjected to excessive force and to be hardly affected by bending, manufacturing, and assembly errors of members. As a result, the rotation smoothness of the operation member can be improved, and as a result, the reliability of the operation of the lock device and the improvement of the service life can be achieved.
[0049]
The drawer is provided with a drawer body for storing articles and an end plate attached to the front surface of the drawer body, and a pivotal support is provided by penetrating left and right at the front end of the side wall of the drawer body. If it is a bearing hole and the operating member is made of a resin that integrally has a shaft portion that fits freely in the bearing hole, the space between the drawer body and the end plate that are likely to cause dead space is effectively used. Thus, the interlocking mechanism can be disposed, and at that time, the bearing hole, the shaft portion, the sliding noise, and the like caused by the rotation of the operating member can be effectively suppressed.
[0050]
In the case where the drawer includes a drawer main body for storing articles and an end plate provided on the front surface of the drawer main body, a dead space is likely to occur between the drawer main body and the end plate. In order to effectively utilize this dead space and arrange the interlocking mechanism, it is preferable that the pivotal support portion is a bearing hole that is provided through the front end portion of the side wall of the drawer main body to the left and right. If the member is made of a resin integrally including a shaft portion that is rotatably fitted in the bearing hole, it is possible to effectively suppress sliding noise and the like generated between the bearing hole and the shaft portion. become able to.
[0051]
An insertion groove is provided at the front end of the drawer body so as to be continuous with the bearing hole, and the shaft portion of the operating member can be inserted into the bearing hole from the opening, and the opening is closed by attaching an end plate Therefore, if the operation member is configured so as not to be removed from the opening, the operation of attaching the operation member to the bearing hole can be facilitated.
[0052]
In this case, if flanges protruding in the radial direction from the shaft portion are provided, and these flanges are brought into contact with the inner surface of the side wall of the drawer body to prevent the operation member from being pulled out, the operation member The movement in the left-right direction can be effectively suppressed, and the pivotal state can be improved.
[0053]
If the transmission shaft is in the shape of a prism, the actuating member and the transmission shaft can be reliably rotated together, and for example, a pultruded product can be used for the transmission shaft as it is. Realization is possible.
[0054]
In the unlocked state, if each actuating member is configured to abut the side edge of the back surface of the end plate constituting the drawer, the actuating member can take an appropriate initial posture in the unlocked state. It is also possible to prevent rattling of the interlocking mechanism.
[0055]
The operation unit is configured to directly drive one actuating member and one lock mechanism corresponding thereto by a given operation force, and indirectly drive the other lock mechanism via an interlocking mechanism. If there is, for example, it is possible to easily cope with the drawer having a small width dimension and removing the interlocking mechanism and the other lock mechanism with respect to the drawer which only needs to be attached to one of the left and right.
[0056]
In such a configuration, if the transmission shaft becomes longer, twisting is likely to occur, and the operation of the other lock mechanism may be insufficient due to this twisting. Thus, when one actuating member and the other actuating member rotate by the same angle, the other actuating member in the other actuating member has a displacement amount that is greater than the amount of displacement of the part receiving the operating force from the operating part in one actuating member. As long as the displacement amount of the part for operating the lock mechanism is set to be large, the above-mentioned point can be reliably solved with a simple configuration, and the proper operation of the other lock mechanism can be achieved. Can be secured.
[0057]
The operating portion has a protrusion that can revolve around a virtual axis extending forward and backward by a given operating force, and the vertical movement caused by the revolving rotation of the protrusion is activated by one of the lock mechanisms. If it is shared by the operation of the interlocking mechanism for driving the other lock mechanism, the structure of the operation unit can be simplified, and the number of parts can be reduced.
[0058]
Specifically, one actuating member includes a pair of cam elements that are disposed at a position deviated from the rotation axis and are set so as to sandwich the protrusion vertically. One example is one in which the vertical power generated by the revolving rotation is received by each cam element and converted into the rotation of one actuating member. The lock mechanism is movable so that it can move up and down between the locked position and the unlocked position. The movable element is provided with a pair of engaging elements disposed so as to sandwich the protrusion vertically, and the vertical power generated by the revolving rotation of the protrusion is applied to one lock mechanism. In this case, each of the engagement elements in FIG. 4 is subjected to pressure so as to be converted into vertical movement of the mover. If it is such, it becomes possible to implement | achieve the said structure linked with an operation part by simple assembly and a structure.
[0059]
The other actuating member includes a second cam element that is disposed at a position deviated from the rotation axis and that can be engaged with an engaging element constituting the other locking mechanism. If the second cam element is configured to be separated from the engagement element by a predetermined distance, assembly errors and manufacturing errors related to the other operating member can be allowed to some extent, and the manufacturing cost and the like can be reduced. .
[Brief description of the drawings]
FIG. 1 is an overall perspective view showing a wagon in one embodiment of the present invention.
FIG. 2 is a partial perspective view showing the 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 body of the same embodiment.
FIG. 5 is a partial perspective view showing the internal structure of the upper drawer 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 a front view showing the internal structure of the upper drawer in which the locking device of the embodiment is incorporated.
FIG. 10 is an exploded perspective view showing the interlocking mechanism of the embodiment.
FIG. 11 is a right side view showing one actuating member of the embodiment.
12 is a left side view in FIG.
13 is a cross-sectional view taken along line AA in FIG.
FIG. 14 is a perspective view showing the other operating member of the embodiment.
FIG. 15 is a partial side view showing the internal structure for explaining the operation of the embodiment.
FIG. 16 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 ... Back of the panel
12b ... sidewall
2 ... Lock mechanism
21 ... Mover
21a, 21b ... engaging elements
3 ... Interlocking mechanism
31 ... one actuating member
31a, 31b ... cam elements
312, 322 ... Shaft
313, 323 ... Buttocks
32 ... the other actuating member
32a ... second cam element
33 ... Transmission shaft
4 ... Operation part
41 ... Projector
JK ... Pivot (bearing hole)
R: Lock position
U: Unlocked position
a, b ... side edges

Claims (11)

A pair of locking mechanisms that can lock the drawer in the storage position on both the left and right sides so that it cannot be pulled out, an interlocking mechanism for interlocking these locking mechanisms, and a locking mechanism in a locked state and an unlocked state The operation mechanism can be operated, and the interlocking mechanism is provided with a transmission shaft rotatably provided in the drawer, and is rotated at each end of the transmission shaft in conjunction with each lock mechanism. A pair of operating members that operate,
The transmission shaft is pivotally provided in the drawer by directly pivoting the operating member on pivotal support portions formed on the left and right side walls of the drawer at both side ends thereof ,
The operation unit directly drives one actuating member and one lock mechanism corresponding thereto by a given operation force, and indirectly drives the other lock mechanism via an interlocking mechanism. locking device of the drawer, characterized in that there. The drawer comprises a drawer body for storing articles and a mirror plate provided on the front surface of the drawer body, and the pivotal support part penetrates the front end of the side wall constituting the drawer body from side to side. 2. The drawer lock device according to claim 1, wherein the drawer lock device is a resin hole integrally provided with a shaft portion that is rotatably provided in the bearing hole. An insertion groove is provided at the front end of the drawer body so as to be continuous with the bearing hole, and the shaft portion of the operating member can be inserted into the bearing hole from the opening, and the end plate is closed by attaching a mirror plate. 3. The drawer lock device according to claim 2, wherein the operating member is configured not to be removable from the opening. 4. A drawer lock device according to claim 3, wherein flanges projecting in a radial direction from the shaft portion are provided, and these collar portions are brought into contact with the inner surface of the side wall of the drawer body to prevent the operation member from being pulled out. . 5. The drawer lock device according to claim 1, wherein the transmission shaft has a prismatic shape. 6. The drawer lock device according to claim 1, wherein each actuating member is configured so that a side edge of each actuating member comes into contact with the rear surface of the end plate constituting the drawer in the unlocked state. When one actuating member and the other actuating member are rotated by the same angle, the other locking mechanism of the other actuating member is set to be larger than the amount of displacement of the part receiving the operating force from the operating part of the one actuating member. withdrawal of the locking device is set as the displacement amount of the portion is larger and claim 1 for operating. The operating portion has a protrusion that can revolve around a virtual axis extending forward and backward by a given operation force, and the vertical movement caused by the revolving rotation of the protrusion is activated by one lock mechanism. the other locking device drawer locking mechanism is shared with the operation of the interlocking mechanism for driving has claim 1 or 7, wherein. One actuating member is provided with a pair of cam elements disposed at a position deviated from the pivot axis and set so as to sandwich the projecting element vertically. 9. The drawer lock device according to claim 8 , wherein power is received by each cam element and converted into rotation of one actuating member . The locking mechanism includes a movable element that can move up and down between a locked position and an unlocked position, and the movable element includes a pair of engaging elements disposed so as to sandwich the protrusion vertically. The drawer lock device according to claim 8 or 9 , wherein the vertical power generated by the revolving rotation of the projecting element is received by each engaging element in one lock mechanism and converted into the vertical motion of the movable element . The other actuating member includes a second cam element that is disposed at a position deviated from the rotation axis and that can be engaged with an engaging element constituting the other locking mechanism. 11. The drawer lock device according to claim 10 , wherein the second cam element is configured to be separated from the engagement element by a predetermined distance .

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