JP4735216B2 - Locking device for drawers in storage furniture - Google Patents

Description

  The present invention relates to a drawer lock device for storage furniture such as a wagon or a sleeve cabinet, and more particularly to a lock device capable of simultaneously locking or unlocking a plurality of drawers stored in a storage furniture body. It is.

  As a drawer lock device in storage furniture such as a conventional wagon or sleeve cabinet, an operating member supported by the side wall of the storage furniture main body so as to be movable up and down, and an elastic member for biasing the operating member in the unlocking direction, A plurality of upper and lower drawers provided with stoppers to be engaged with the engaging parts provided in the operating member, and a lock provided on the front plate of the specific drawer that protrudes to the side with the locking or unlocking operation. A lock having an operation member, and a linkage provided on the side handle to transmit an operation force by the lock operation member to the operation member and interlock the lock operation member and the operation member. There is one that simultaneously locks or unlocks the plurality of drawers by engaging and disengaging the locking portion and the stopper by a locking or unlocking operation (see, for example, Patent Document 1 or 2).

  In Patent Document 1, as the linking tool, a substantially L-shaped rotating member in front view formed by bending a vertical piece and a horizontal piece is provided on the inner surface of the side wall so as to be rotatable around a horizontal axis in the front-rear direction. When the lock operating member pushes the vertical piece (input part), the horizontal piece (output part) presses the contact part provided on the operating member and resists the biasing force of the elastic member. Then, there is a disclosure of a configuration in which the lock operation member and the operation member are interlocked so that the operation member is lowered.

  Further, in Patent Document 2, a pivot member having a substantially triangular shape when viewed from the front is housed in a case so as to be eccentrically rotatable about a horizontal axis in the front-rear direction, and the case is opened on the inner surface of the side wall. When the lock operating member pushes the eccentric part (input part) of the rotating member, the pin (output part) protrudes at an appropriate position of the eccentric part of the rotating member and engages with the recess of the operating member. ), The operation member is lowered against the urging force of the elastic member, and the lock operation member and the operation member are interlocked.

Utility Model Registration No. 2559508 (Figure 2-6) Utility Model Registration No. 2595136 (Figure 2-7)

  In the drawer lock device in the storage furniture disclosed in Patent Documents 1 and 2, the lock operation member and the operation member are linked only by a contact relationship via a linkage tool that is not linked to the lock operation member. The lock can be provided on the front plate of the drawer, the actuating member can be provided on the side wall of the storage furniture body, and the linkage can be provided independently in the opening of the side wall, thereby making assembly work extremely easy, and In addition, since it is not necessary to expose the upper collar of the storage furniture body to the front surface, or because it can be formed thin, there are significant effects such as ensuring a wide storage space for the drawer.

  However, between the lock operation member and the input portion, and between the output portion and the actuating member (between the lateral piece and the contact portion, or between the pin and the recess). Since the sliding portion wears out, the reliability of the drawer lock device may not be maintained over a long period of time, and there is room for improvement in this respect.

  The present invention has been made to solve the above-described problems, and is provided between the lock operation member and the input portion of the linkage tool, and between the output portion of the linkage tool and the operation member. It is an object of the present invention to provide a drawer lock device for storage furniture that can maintain reliability over a long period of time by suppressing wear during the period.

  In order to solve the above problems, the drawer lock device for storage furniture according to the present invention includes an operating member supported on the side wall of the storage furniture main body so as to be movable up and down, and an elastic force for biasing the operating member in the unlocking direction. A plurality of upper and lower drawers provided with a member, and a stopper that is locked to a locking portion provided on the operating member, and a side with a locking or unlocking operation provided on a front plate of a specific drawer A lock device for a drawer in a storage furniture comprising a lock having a lock operation member that protrudes and retracts, and a linkage that is provided on the side rod and transmits an operation force by the lock operation member to the operation member, The linkage includes a base body provided with bearing holes above and below, a pivot shaft extending in a vertical direction supported rotatably around a vertical axis by the bearing holes of the base body, and upper and lower parts of the pivot shaft. Horizontally installed at one end and beyond A rotary input body comprising a rotary lever as an input portion pressed by the lock operating member, and fitted on the rotary shaft and rotated integrally with the rotary shaft, and one of the upper and lower sides thereof When the end surface of the lens is moved in the circumferential direction, the end surface cam body whose shape is monotonously increased or decreased, and loosely fitted to the rotation shaft and restricted in rotation, the rotation is controlled with respect to the rotation shaft. The output member is configured to be slidable in the vertical direction, and is provided with an output body that is provided with an output portion that drives the operating member and is provided with a cam follower of the end face cam.

  Further, in order to solve the above problems, the drawer lock device for storage furniture according to the present invention includes an operating member supported on the side wall of the storage furniture main body so as to be movable up and down, and biases the operating member in the unlocking direction. A plurality of drawers provided with upper and lower drawers provided with stoppers to be locked to the locking portions provided on the operating members, and a side provided with a locking or unlocking operation provided on a front plate of a specific drawer A lock device for drawers in storage furniture, comprising: a lock having a lock operation member that protrudes and retracts toward the direction; and a linkage provided on the side rod to transmit an operation force by the lock operation member to the operation member. The linkage includes a base body provided with bearing holes at the top and bottom, a vertically extending rotation shaft supported rotatably around a vertical axis by the bearing hole of the base body, and the rotation shaft Horizontally installed at the top and bottom ends, A rotation input body composed of a rotation lever, which is an input portion that is pressed by the lock operation member, and a rotation input body that is externally fitted to the rotation shaft and rotates integrally with the rotation shaft. An upper and lower end cam body that is configured to be slidable in the vertical direction with respect to the moving shaft, and whose end surface cam has a shape that monotonously increases and decreases when the upper end surface and the lower end surface thereof move in the circumferential direction, and the rotating shaft An output body that is loosely fitted and whose rotation is restricted, is slidable in the vertical direction with respect to the rotation shaft, and is provided with an output unit that drives the operating member. Each is provided with a cam follower of an end face cam of the upper and lower end face cam bodies.

  Here, it is preferable that an elastic member for urging the output body in the direction of the end face cam body is provided in the base, and the elastic member is an elastic member for urging the operating member in the unlocking direction.

  According to the drawer lock device for the storage furniture according to the present invention, the operation member supported by the side wall of the storage furniture body so as to be movable up and down, the elastic member for urging the operation member in the unlocking direction, and the operation A plurality of upper and lower drawers provided with stoppers that are locked to locking parts provided on the members, and a lock operation member that is provided on the front plate of a specific drawer and that protrudes to the side along with the locking or unlocking operation A lock device for drawers in storage furniture, comprising: a lock having a lock; and a linkage provided on the side rod and transmitting an operation force by the lock operation member to the actuating member, wherein the linkage is A base body provided with bearing holes on the top and bottom, a pivot shaft extending in a vertical direction supported so as to be pivotable about a vertical axis by the bearing holes of the base body, and horizontally disposed at one end portion of the pivot shaft The tip of the lock is A rotation input body composed of a rotation lever that is an input portion pressed by the work member, and is fitted around the rotation shaft to rotate integrally with the rotation shaft, and one of the upper and lower end faces thereof And an end cam body whose shape is monotonously increased or decreased when moved in the direction, and loosely fitted on the rotating shaft and restricted in rotation, and slides up and down with respect to the rotating shaft. And an output portion for driving the actuating member and an output body provided with a cam follower for the end face cam, so that the wear between the output portion of the coupling tool and the actuating member is provided. Therefore, reliability can be maintained over a long period of time.

  Further, according to the drawer lock device in the storage furniture according to the present invention, an operation member supported by the side wall of the storage furniture body so as to be movable up and down, and an elastic member for biasing the operation member in the unlocking direction, A plurality of upper and lower drawers provided with stoppers to be engaged with the engaging parts provided in the operating member, and a lock provided on the front plate of the specific drawer that protrudes to the side with the locking or unlocking operation. A lock device for a drawer in storage furniture, comprising: a lock having an operation member; and a linkage provided on the side rod and transmitting an operation force by the lock operation member to the operation member. At the upper and lower ends of the pivot shaft, the pivot shaft extending in the vertical direction supported rotatably around the vertical axis by the bearing holes of the base body, and the pivot shaft It is installed horizontally and its tip is A rotation input body comprising a rotation lever as an input portion pressed by a hook operation member, and an external fitting to the rotation shaft and rotation integrally with the rotation shaft, with respect to the rotation shaft The upper and lower end cam bodies are shaped as end face cams whose height monotonously increases and decreases when the upper end surface and the lower end surface thereof move in the circumferential direction, and are loosely fitted to the rotating shaft. Together with an output body that is controlled to rotate and is slidable in the vertical direction with respect to the rotation axis, and is provided with an output section that drives the operating member. Since the cam followers of the end face cams of the upper and lower end face cam bodies are provided, it is possible to suppress wear between the output portion of the linkage tool and the actuating member, so that reliability can be maintained over a long period of time. it can. In addition, since the double cam mechanism is used, the rotating lever for securing the vertical stroke of the output portion necessary for switching between the unlocked state and the locked state of the drawer with a simple and compact configuration. The rotation angle becomes smaller, and wear between the lock operating member and the input portion of the linkage tool can be suppressed, so that the reliability is further improved.

  Furthermore, when an elastic member for urging the output body in the direction of the end face cam body is provided in the base, and the elastic member is an elastic member for urging the operating member in the unlocking direction, in addition to the effects, Since it is not necessary to provide an elastic member for urging the actuating member in the unlocking direction separately from the unitized linkage, assembly workability can be greatly improved. In addition, since the cam mechanism including the elastic member is completed within the unit and has a simple configuration as a whole, the reliability of the entire locking device can be improved.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and all the embodiments that satisfy the requirements described in the claims are described. Is included. In the present specification, the direction in which the drawer is pulled out (the side in which the drawer is opened) is the front, the opposite side (the direction in which the drawer is closed) is the rear, and the left and right are the left and right.

  FIG. 1 is a vertical left side view showing a wagon provided with a drawer with two upper and lower stages using a drawer lock device in a storage furniture according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the drawer. 4 and 4 are explanatory views showing the structure of the lock and the lock operation member. FIG. 3 is an exploded perspective view seen from the rear side, and FIG. 4 is a perspective view seen from the front side. 5 and 6 are perspective views seen from the front side showing the relationship between the lock and the lock operating member, the linkage tool, and the actuating member, and FIG. 6 also shows a method of attaching the linkage tool to the side rod. Further, FIG. 7 is an enlarged left side view showing a state in which the linking tool and the operating member are assembled in the side rod, FIG. 8 is an exploded perspective view of the linking tool, and FIG. 9 is an outline view of the upper and lower end cams. 9 (a) is a front view (viewed from the left), FIG. 9 (b) is a side view, and FIG. 9 (c) is a bottom view. FIG. 10 is a diagram for explaining the operation of the linkage tool. FIG. 10 (a) shows the unlocked state, and FIG. 10 (b) shows the locked state.

  As shown in FIG. 1, a wagon 101 is pulled out by a wagon body 102, guide means 103, 103 comprising a combination of a rail attached to the left and right inner surfaces of the wagon body 102, and rollers and sliders engaged with the rail. The upper drawer 104, the lower drawer 105, and the like that are supported by the rails 3a and 3a and can be opened and closed forward and backward are configured. Further, the wagon body 102 includes a steel side plate having a substantially U-shape in plan view formed by opening the front side made up of the rear side plate 106 and the left and right side plates 107, 107, and an upper steel plate attached to the front and rear of the side plate. 108a and a mounting plate 108b, a steel lower plate 109a and a bottom plate 109b attached to the lower side of the side plate, a steel or wooden top plate 110 attached to the upper surface of the upper plate 108a and the mounting plate 108b, and a lower plate It is comprised by the caster 111, ... attached to the lower surface of the collar 109a and the bottom plate 109b. The casters 111,... Facilitate the movement of the wagon 101.

  As shown in FIGS. 1 and 2, the upper drawer 104 and the lower drawer 105 have a substantially U-shaped front view in which a steel back cover 2 is attached to the rear surface of the steel front plate 1 and opened upward on the rear side. The steel body plate 3 is attached, and the steel rear plate 4 is attached to the rear side of the body plate 3 to form an article accommodating portion. Further, the pulling device 11 is a superposition of a pulling body 12 made of a synthetic resin that can be rotated around a left-right axis on the upper side of the front plate 1 of the drawers 104 and 105, and a polymerization that closes a gap due to the rotation of the pulling body 12. And a synthetic resin cover body 13 provided with a portion. Note that the engagement hole 30 shown in FIG. 2 is formed only in the upper drawer 104.

  When the drawers 104 and 105 are closed and accommodated in the wagon body 102, the front plates 1 and 1 of the drawers 104 and 105 are hidden by the top plate 110 and the left and right side plates 107 and 107 in a plan view and a side view. Since the structure is not visible in a plan view and a side view, it is possible to give a clean appearance and protect the handle body 12 and the cover body 13 made of synthetic resin as described above. .

  The drawers 104 and 105 are supported by the guide means 103 and 103 as described above and can be opened and closed in the front-rear direction. When the drawers 104 and 105 are closed, the latch device 31 is in an operating state. Opening unexpectedly is prevented. When the pulling body 12 is pulled, the latch device 31 is released in conjunction with the operation.

  A cover body support portion 21 that is continuously bent upward, rearward, and downward is formed on the upper portion of the front plate 1, and engagement holes 29a,... Are formed on the lower portion of the front plate 1, to the rear. An extending back plate support plate 29 is provided horizontally. A body plate 3 is welded to the back cover 2, and an engagement piece 41 including a back plate 41a and a top plate 41b is formed on the top of the back cover 2 by being continuously bent upward and forward. An engaging projection (not shown) projects downward from the lower portion of the cover 2.

  Therefore, after the lock 52 (see FIGS. 3 to 6), which will be described later, is attached to the back cover 2 in the upper drawer 104, the engagement piece 41 on the top of the back cover 2 is placed under the cover body support portion 21 of the front plate 1. With the rear plate 41a and the upper surface plate 41b engaged with the lower side of the cover body support portion 21 with the rear plate 41a and the upper plate 41b engaged with the lower side of the front cover 1, By engaging the engagement holes 29a formed in the plate 29, a cylinder 58 (see FIGS. 4 to 6), which will be described later, is engaged with the engagement hole 30, and the back cover 2 is easily moved forward. It can be attached to the plate 1.

  As shown in FIG. 2, protrusions 45, 45 projecting outward are provided on the left and right outer surfaces of the body plate 3 of the drawer 104 (105), and the protrusions 45, 45 have engagement holes 45a in the front-rear direction. 45a are formed. Engagement holes 43a, 43a are formed in the left and right rear plates 43, 43 of the back cover 2 of the drawer 104 (105), and the locking holes 44a are formed in the left and right side plates 44, 44 of the back cover 2. 44a are formed.

  Accordingly, the engaging pieces 142a and 142a of the anti-vibration bodies 141 and 141 that perform the anti-vibration when closing the drawer 104 (105) are inserted from the rear side of the engaging holes 45a and 45a of the body plate 3, and the back The locking pieces 143a and 143a of the anti-vibration bodies 141 and 141 are inserted from the rear side of the engaging holes 43a and 43a of the cover 2, and the locking pieces 143a are inserted into the locking holes 44a and 44a of the back cover 2. , 143a is fastened to the body plate 3 and the back cover 2 in a state where the left and right anti-vibration bodies 141 and 141 are in contact with the left and right outer surfaces of the body plate 3. Mounted.

  Further, as shown in FIG. 2, on the right side surface of the body plate 3 of the drawer 104 (105), a locking portion 59 (see FIG. 3 to FIG. 6) of the operating member 55 that is interlocked with the key operation of the lock 52 (see FIGS. 3 to 6). Since the stopper 46 which latches in FIG.1 and FIG.5-FIG.7) is provided, the several drawers 104 and 105 can be simultaneously locked or unlocked so that it may mention later.

  Next, with reference to FIG. 3 and FIG. 4, the structure and the mounting structure of the lock 52 and the lock operation member 53 constituting the lock device 51 will be described. As shown in FIG. 3, in the upper drawer 104, the mounting plate 57 is positioned by engaging its engaging projections 57a and 57b with the engaging holes 48a and 48b from the front side of the back plate 2, for example, spot welding. And firmly fixed to the back cover 2.

  The lock operation member 53 is made of a steel plate, and is suspended from the right end portion of the first plate 61 having a substantially vertical first plate 61 whose thickness direction is substantially the front-rear direction. A substantially vertical second plate-like body 62 whose thickness direction is substantially the front-and-rear direction, and extending from the upper end of the second plate-like body 62 to the right, the thickness direction being substantially the vertical direction. A substantially horizontal third plate-like body 63 is integrally formed.

  The vertical hole 61 a on the front side of the first plate 61 of the lock operation member 53 is engaged with an eccentric pin 52 a protruding from the rear surface of the lock 52, and the first plate 61 is moved to the left and right of the lock 52. Are engaged with the notches 52c and 52c. In this state, the lock operation member 53 is slid in the left-right direction by fitting the mounting shafts 52b of the lock 52 into the through holes 56a of the seat plate 56 and caulking the tips of the mounting shafts 52,. It is supported by the key 52 of the lock 52 and is driven by an eccentric pin 52a that rotates around the central axis of the cylinder 58 (see FIG. 4) to reciprocate in the left-right direction.

  In this way, the lock 52 having the lock operation member 53 attached thereto as a unit with a simple configuration having a small number of parts is substantially horizontal to the side opening 47 of the back cover 2 as shown in FIG. In the state where the third plate-like body 63 is inserted, the engaging piece 56b of the seat plate 56 is engaged with the engaging hole 57c of the mounting plate 57 fixed to the back cover 2 as described above, and the step portion 56c. , 56c are positioned at positions where they are abutted against the retaining portions 57d, 57d of the mounting plate 57. In this state, if the presser plate 57e of the mounting plate 57 is pressed downward with a tool and bent to a position where it engages with the recess 52d on the upper surface of the lock 52, the lock 52 can be easily and reliably attached to the back cover 2. it can.

  The lock 52 attached to the back cover 2 of the upper drawer 104 in this way is supported and fixed between the front plate 1 and the back cover 2 because the back cover 2 can be easily attached to the front plate 1 as described above. The cylinder 58 is engaged with the engagement hole 30 of the front plate 1 so that the key hole 58a is exposed to the front surface. The side opening 47 of the back cover 2 is the third free end side portion of the lock operation member 53. The plate-like body 63 protrudes.

  Since the third plate-like body 63 of the lock operation member 53 is a substantially horizontal plate shape whose thickness direction is substantially the vertical direction, the thickness direction thereof is the front-rear direction as in a conventional lock operation member. Compared with the vertical plate-shaped one, the shape in the front-rear direction is large, so the section modulus is large with respect to the external force in the front-rear direction, and thus the strength and rigidity against the external force in the front-rear direction are high.

  Therefore, the lock 52 is erroneously operated with the upper drawer 104 opened, and the third plate 63 of the lock operating member 53 is projected to the right side from the drawer to close the drawer. Even if the third plate-like body 63 collides with the scissors 131 (see FIGS. 5 and 6) of the storage furniture main body 102, the third plate-like body 63 is hardly deformed and the lock operation member 53 is stabilized. Since the operation continues, the reliability of the locking device 51 can be maintained over a long period of time.

  As shown in FIG. 3, a guide member 64 made of synthetic resin such as polyacetal, polypropylene, polyethylene terephthalate, nylon, or ABS is attached to the side opening 47 of the back cover 2 of the upper drawer 104. That is, when the upper and lower mounting portions 65, 65 of the guide member 64 are inserted from the outside of the side opening 47 and the upper and lower locking pieces 65a, 65a are locked, the guide member 64 is easily mounted on the back cover 2. The front surface of the guide member 64 contacts the rear surface of the front plate 1.

  Since the guide member 64 is formed with a through hole 66 in the left-right direction, the third plate 63 of the lock operation member 53 can be inserted, and the upper and lower guide ribs of the through hole 66 of the guide member 64 are inserted. 67 and 67 guide the upper and lower surfaces of the third plate-like body 63, and the guide wall 68 guides the front surface of the third plate-like body 63.

  Therefore, since the resin guide member 64 guides the third plate-like body 63 of the steel lock operation member 53, the lock operation member 53 is further hardly deformed, and the reliability of the lock device 51 is further increased. Can be maintained over a period of time. In addition, the guide member 64 also functions as a swing stopper when the lock operation member 53 is moved in the left-right direction. Further, the exposed portion of the third plate-like body 63 is reduced, which is more preferable from the viewpoint of safety. Is.

  Next, the relationship between the lock 52 and the lock operation member 53, the linkage tool 54, and the operation member 55 constituting the lock device 51 will be described with reference to FIGS. 5 to 7. As shown in FIG. 6, the linking tool 54 is inserted from a linking tool mounting hole 133 formed in the side rod 131 (right front reinforcing body), and the engagement pieces 71 e and 71 f are inserted into the notches 135 a and 135 b of the side ridge 131. By engaging and locking the locking pieces 71g and 71h in the locking holes 136a and 136b, they can be easily attached to the side rod 131. In this attached state, the driven portion (input portion) 81 is exposed from the through hole 134 of the side rod 131. Further, when the driven portion 81 (input portion) is pushed by the tip of the third plate-like body 63 of the lock operation member 53, the linkage 54 is inserted into the vertical guide groove 132 formed in the side rod 131. The protruding output piece 86 (output portion) is composed of a cam mechanism which will be described later.

  Further, as shown in FIG. 5, the operating member 55 is fitted in a vertical guide groove 132 formed in the side rod 131 (right front reinforcing body), and is supported by the side rod 131 so as to be vertically slidable. Locking portions 59, 59 projecting inwardly are provided on the inward surface (left surface), and the output piece 86 of the linkage 54 is engaged with the engagement hole 55a.

  With the above-described configuration of the lock device 51, as shown in FIG. 6, when a key (not shown) is inserted into the key hole 58a of the lock 52 and the key is rotated (for example, rotated clockwise by 180 °), the lock operation member 53 The third plate-like body 63 moves in a direction approaching the side rod 131 (see arrow A in FIG. 6). When the driven portion 81 of the rotation input body 72 of the linkage 54 is pushed by the tip 63a of the third plate-like body 63, the rotation input body 72 rotates backward (arrow B in FIG. 6). The output piece 86 is lowered (see arrow C in FIG. 6).

  The substantially horizontal third plate-like body 63 of the lock operation member 53 has a distal end portion 63a bent rearward, which is as close as possible to the center of rotation of the driven portion 81 of the rotation input body 72. By pushing the position, the rotation angle of the rotation input body 72 is increased as much as possible with respect to the movement amount of the lock operation member 53.

  When the output piece 86 is lowered as described above, the lower surface of the engagement hole 55a is pushed by the output piece 86, and the operation member 55 is also lowered (see arrow D in FIG. 6). When the actuating member 55 is lowered, the locking portions 59, 59 are lowered from the position of FIG. 7, so that the locking portions 59, 59 are provided on the stoppers 46, 46 provided on the drawers 104, 105 (see also FIG. 2). .)), The plurality of drawers 104 and 105 housed in the storage furniture main body 102 can be locked simultaneously. Further, when the key is reversed (for example, rotated 180 ° counterclockwise), the third plate 63 of the lock operation member 53 moves in a direction away from the side bar 131, so that the lock is released by an elastic member described later. The actuating member 55 urged upward in the direction rises, and the drawers 104 and 105 can be unlocked simultaneously.

  Next, the structure of the linkage tool 54 will be described with reference to FIGS. As shown in FIG. 8, an upper bearing hole 71a and a lower bearing hole 71b are formed on the upper and lower sides of a coupling resin body (base body) 71 made of a synthetic resin such as polyacetal, polypropylene, polyethylene terephthalate, nylon, or ABS. Is formed with a notch 71c for inserting the output piece 86 and upper and lower elongated holes 71d formed on the other side. In addition, on the lower surface of the upper plate, axially symmetric slopes 82a and 82b that are in contact with slopes 83a and 83b, which are cams on the upper end surface of the upper and lower end face cam body 73 described later, are formed. Since the slopes 82a and 82b are cam followers, the slopes are not limited to slopes, and can be appropriately formed into a rod-like shape with a rounded tip or a roller. And as above-mentioned, it attaches to the side rod 131 by the engagement pieces 71e and 71f and the locking pieces 71g and 71h.

  Further, a rotation input body 72 made of synthetic resin such as polyacetal, polypropylene, polyethylene terephthalate, nylon, or ABS includes a rotation lever 72a extending in the horizontal direction, and an upper circle constituting a rotation axis of the rotation lever 72a. The shaft 72b is composed of a vertically long rectangular shaft 72c and a lower round shaft 72d. The tip of the rotating lever 72a is the driven portion 81, and a circumferential groove 72e is formed on the lower round shaft 72d.

  Further, as shown in FIGS. 8 and 9, the upper and lower end cam bodies 73 made of synthetic resin such as polyacetal, polypropylene, polyethylene terephthalate, nylon, or ABS have slopes 83a and 83b formed on the upper end surface in an axially symmetrical manner. It is an end face cam in which slopes 84a and 84b are formed symmetrically on the end face, and the slope has a shape that increases and decreases monotonously when moving in the circumferential direction. Then, a square hole 73a is formed which is fitted around the square shaft 72c of the rotation input body 72.

  Furthermore, as shown in FIG. 8, the output body 74 made of synthetic resin such as polyacetal, polypropylene, polyethylene terephthalate, nylon, or ABS has slopes 84a and 84b that are cams on the lower end surface of the upper and lower end cam body 73. Axisymmetrical inclined surfaces 85a and 85b are formed. Since the slopes 85a and 85b are cam followers, the slopes are not limited to slopes, and can be appropriately formed into a rod-like shape with a rounded tip or a roller.

  Further, the output body 74 is loosely fitted around the angular axis 72c of the rotation input body 72, and a through hole 74a having a size that does not transmit torque due to the rotation of the rotation input body 72 is formed. A guide pin 74b that engages with the elongated hole 71d of the linkage main body 71 protrudes, and on the opposite side of the guide pin, the guide pin 74b is inserted into the notch 71c of the linkage main body 71 to engage with the engagement hole of the operating member 55. An output piece (output unit) 86 that engages with 55a is provided.

  Next, a method for assembling the linkage 54 will be described. The rotation input body 72 is inserted from above the upper bearing hole 71a of the linkage main body 71, and in the linkage main body 71, the square shaft 72c is engaged with the square hole 73a of the upper and lower end cam body 73, and below that. In the state where the guide pin 74b of the output body 74 is engaged with the long hole 71d and the output piece 86 is inserted into the notch 71c, the square shaft 72c is inserted into the through hole 74a of the output body 74, and further below The square shaft 72 c is inserted into the coil of the compression coil spring 75. The upper circular shaft 72b of the rotation input body 72 is engaged with the upper bearing hole 71a of the linkage main body 71 and the lower circular shaft 72d is engaged with the circumferential groove 72e of the lower circular shaft 72d in a state where the lower circular shaft 72d is engaged with the lower bearing hole 71b. If 76 is attached, the linking tool 54 is easily assembled and unitized.

  The compression coil spring 75 is an elastic member that urges the operation member 55 in the unlocking direction. Since the output body 74 is urged upward by the compression coil spring 75, the operation member 55 is also connected via the output piece 86. It is urged upward. Therefore, when the third plate 63 of the lock operating member 53 does not press the driven portion 81 of the linkage 54 by the key operation of the lock 52, the operating member 55 is in the raised position, and the locking portions 59, 59 is in an unlocked state where it is not located in front of the stoppers 46, 46 of the drawers 104, 105.

  The unlocked linkage 54 is as shown in FIG. 10A. From this state, the third plate 63 of the lock operating member 53 is driven by the key 52 of the lock 52 so that the driven portion of the linkage 54 is driven. When 81 is pressed, the rotation input body 72 rotates as indicated by an arrow B in FIG. 10B, and the angular shaft 72c and the upper and lower end cam bodies 73 also rotate in the same direction. On the other hand, the linkage main body 71 and the output body 74 do not rotate. The rotation is converted into a downward linear motion by a double cam mechanism between the slopes 84a and 84b at the lower end surface of the output body and the slopes 85a and 85b of the output body 74, as indicated by an arrow C in FIG. Thus, the output piece 86 descends.

  According to the double cam mechanism having such a configuration, the rotation around the vertical axis is converted into the linear movement in the vertical direction by the relative movement in the circumferential direction between the axisymmetric inclined surfaces as described above. Therefore, since the axially symmetric slope is used, the lateral force acting on the slope is canceled out, so that the linear motion in the vertical direction is performed more smoothly. The linkage tool main body 71, the rotation input body 72, the upper and lower end surface cam bodies 73, and the output body 74 constituting the linkage tool 54 have portions that slide during the operation of converting the rotation into a linear motion. Since it is made of a synthetic resin such as polyacetal, it is highly reliable because it does not wear like sliding between a metal and a resin.

  Further, the linkage tool main body 71, the rotation input body 72, the upper and lower end face cam bodies 73 and the output body 74 constituting the cam mechanism of the linkage tool 54 are made of synthetic resin such as polyacetal having high wear resistance as described above. However, when made of polyacetal, the reliability of the operation of the double cam mechanism of the linkage 54 can be ensured for a longer period of time due to the self-lubricating property that is one of the features of polyacetal.

  As described above, the linkage 54 that converts the rotation into the linear motion uses such a double cam mechanism using the cam body 73 formed with the end face cams in the vertical direction, and thus is simple and compact. With this configuration, a large vertical stroke of the output piece 86 can be obtained even if the rotation angle of the rotation lever 72a of the rotation input body 72 is small. That is, the rotation angle (required) of the rotation lever 72a for securing the vertical stroke of the output piece (output unit) 86 necessary for switching between the unlocked state (unlocked state) and the locked state (locked state) of the drawer. (Rotation angle) becomes smaller.

  Therefore, after the tip of the third plate-like body 63 of the lock operation member 53 comes into contact with the driven part 81 (input part), the driven part 81 is further pushed, and the rotation lever 72a rotates the required angle. Therefore, it is possible to reduce the movement distance of the lock operation member 53 and the driven portion 81 (input portion) that is necessary for the purpose. Therefore, sliding between the lock operation member 53 and the driven portion 81 (input portion) of the linkage tool 54 can be reduced, and wear of the sliding portion can be suppressed.

  In addition, if the slope of the slope of the end face cam is large, the cam mechanism may not operate smoothly. However, if the double cam mechanism is used, the slopes 83a and 83b of the upper end face of the upper and lower end face cam body 73 and the linkage tool. The required stroke can be secured even if the slopes 82a and 82b of the main body 71 and the slopes 84a and 84b of the lower end face of the upper and lower end cam body 73 and the slopes 85a and 85b of the output body 74 are relatively small. Since the operation can be facilitated, the reliability is improved.

  Further, as described above, the output of the linking tool 54 is the linear movement in the vertical direction of the output piece 86 (output unit) by the linear movement of the output body 74 in the vertical direction without rotating. Since it does not slide at all with the engagement hole 55a of the actuating member 55 engaged with the (output part), the space between the output piece 86 (output part) of the linkage 54 and the engagement hole 55a of the actuating member 55 is worn. There is nothing.

  As described above, since the wear between the lock operation member 53 and the input portion of the linkage tool 54 and between the output portion of the linkage tool 54 and the operation member 55 can be suppressed, the reliability of the lock device 51 is improved. Sex can be maintained over a long period of time.

  The linkage 54 is easily assembled as described above, but the coil spring 75 is not necessarily housed in the linkage body (base) 71, and an elastic member that biases the operating member 55 in the unlocking direction. A coil spring may be provided below the actuating member. However, if the unit is formed in a state including the coil spring 75 that is an elastic member that biases the operating member 55 in the unlocking direction as in the present embodiment, the compression coil spring is separately provided below the operating member 55. Since it is not necessary to attach the unit and the unit can be easily attached to the side rod 131, the assembling workability can be greatly improved, and the double cam mechanism including the coil spring 75 is provided in the unit. Therefore, the overall configuration is simple, and the reliability of the locking device 51 as a whole can be improved.

  In the above description, the linking tool 54 is vertically supported by the linking tool main body (base body) 71 provided with the bearing holes 71a and 71b on the upper and lower sides and the bearing holes 71a and 71b so as to be rotatable about the vertical axis. Rotating shafts 72 b, 72 c, 72 d that extend, and a rotating lever that is horizontally provided at upper and lower ends of the rotating shaft, and whose tip is a driven portion (input portion) 81 that is pressed by the lock operation member 53. A rotation input body 72 made of 72a and an angular shaft 72c of the rotation shaft are externally fitted to rotate integrally with the rotation shaft, and can be slid vertically with respect to the rotation shaft. When the end face and the lower end face move in the circumferential direction, the upper and lower end face cam body 73 is formed into an end face cam whose shape is monotonously increased and decreased, and the rotation is loosely fitted to the rotation shaft and the rotation is restricted. It is slidable in the vertical direction with respect to the moving shaft, and the operating member 5 is provided with an output body 74 and the like provided with an output piece (output portion) 86 for driving the cam 5, and each of the linking tool main body 71 and the output body 74 is provided with a cam follower of the end face cam of the upper and lower end face cam body 73. The case where it consists of a double cam mechanism was demonstrated. As described above, such a configuration using the double cam mechanism can maintain reliability over a long period of time due to the effect of suppressing wear and the like. However, the present invention is not limited to such a configuration, and a configuration using a cam body in which one of the upper and lower end surfaces is an end surface cam may be used.

In such a configuration using a cam body with one of the upper and lower end faces as an end face cam, the linkage tool is supported, for example, by a base body provided with upper and lower bearing holes, and rotatable about a vertical axis by the bearing hole of the base body. A pivot comprising a pivot shaft extending in the vertical direction, and a pivot lever horizontally provided at the upper and lower ends of the pivot shaft, the tip of which is an input portion pressed against the lock operation member. Input body,
A cam body that is externally fitted to the rotation shaft and rotates integrally with the rotation shaft, and has an end surface cam whose height monotonously increases and decreases when one of the upper and lower end surfaces thereof moves in the circumferential direction; The rotary cam is loosely fitted to the rotary shaft, the rotation is restricted, the slide is vertically slidable with respect to the rotary shaft, an output portion for driving the operating member is provided, and the cam of the end face cam -It consists of an output body provided with a follower.

  Even in such a configuration using a cam body having one of the upper and lower end faces as an end face cam, the output portion of the output body and the engagement hole 55a of the operating member 55 do not slide at all. There is no wear between the 55 engaging holes 55a.

It is a vertical left view which shows the wagon provided with the drawer | drawer of 2 steps | paragraphs of upper and lower sides with which the drawer lock apparatus in the storage furniture which concerns on embodiment of this invention was used. It is a disassembled perspective view of a drawer. It is the disassembled perspective view seen from the back side which shows the structure of a lock and a lock operation member. It is the perspective view seen from the front side which shows the structure of a lock and a lock operation member. It is the perspective view seen from the front side which shows the relationship between a lock and a lock operation member, a coupling tool, and an operation member. It is the perspective view seen from the front side which shows the relationship between a lock and a lock operation member, a coupling tool, and an operation member. It is a left side enlarged view which shows the state which assembled the linkage tool and the operation member in the side cage. It is a disassembled perspective view of a connection tool. It is an external view of an upper-lower-end surface cam, (a) is a front view, (b) is a side view, (c) is a bottom view. It is operation | movement explanatory drawing of a coupling tool, (a) has shown the unlocked state, (b) has shown the locked state.

Explanation of symbols

101 Wagon (storage furniture)
102 Wagon body (storage furniture body)
104 Upper drawer 105 Lower drawer 131 Side rod (right front reinforcement)
132 Guide groove 133 Linkage fitting hole 134 Through holes 135a, 135b Notches 136a, 136b Locking hole 1 Front plate 2 Back cover 3 Body plate 4 Rear plate 46 Stopper 51 Lock device 52 Lock 53 Lock operation member 54 Linkage 55 Actuation Member 55a Engagement hole 59 Locking part 61 First plate-like body 62 Second plate-like body 63 Third plate-like body 71 Linkage tool body (base body)
71a Upper bearing hole 71b Lower bearing hole 71c Notch 71d Long holes 71e, 71f Engagement pieces 71g, 71h Locking piece 72 Rotating input body 72a Rotating lever 72b Upper round shaft 72c Square shaft 72d Lower round shaft 72e Circumferential groove 73 Upper / lower end cam body 73a Square hole 74 Output body 74a Through hole 74b Guide pin 75 Compression coil spring (elastic member)
76 Retaining ring 81 Driven part (input part)
82a, 82b Slope (cam follower)
83a, 83b, 84a, 84b Slope 85a, 85b Slope (cam follower)
86 Output piece (output unit)

Claims (3)

An operating member supported on the side wall of the storage furniture main body so as to be movable up and down, an elastic member that urges the operating member in the unlocking direction, and a stopper that is locked to a locking portion provided on the operating member are provided. A plurality of upper and lower drawers, a lock provided on a front plate of a specific drawer, and having a lock operation member that protrudes and retracts to the side in accordance with the locking or unlocking operation, and the lock provided on the side hook A drawer lock device in a storage furniture comprising a linkage that transmits an operation force by an operation member to the operation member,
The linkage includes a base body provided with bearing holes above and below, a pivot shaft extending in a vertical direction supported rotatably around a vertical axis by the bearing holes of the base body, and upper and lower parts of the pivot shaft. A rotation input body comprising a rotation lever, which is horizontally provided at one end portion and whose front end portion is an input portion pressed against the lock operation member, and is externally fitted to the rotation shaft and integrated with the rotation shaft. And an end face cam body having a shape in which the height monotonously increases or decreases when one of the upper and lower end faces thereof moves in the circumferential direction, and is loosely fitted to the rotation shaft and the rotation is restricted. A drawer in storage furniture comprising an output body which is slidable in the vertical direction with respect to the rotation shaft, and which is provided with an output body for driving the operating member and provided with a cam follower of the end face cam. Locking device. An operating member supported on the side wall of the storage furniture main body so as to be movable up and down, an elastic member that urges the operating member in the unlocking direction, and a stopper that is locked to a locking portion provided on the operating member are provided. A plurality of upper and lower drawers, a lock provided on a front plate of a specific drawer, and having a lock operation member that protrudes and retracts to the side in accordance with the locking or unlocking operation, and the lock provided on the side hook A drawer lock device in a storage furniture comprising a linkage that transmits an operation force by an operation member to the operation member,
The linkage includes a base body provided with bearing holes above and below, a pivot shaft extending in a vertical direction supported rotatably around a vertical axis by the bearing holes of the base body, and upper and lower parts of the pivot shaft. A rotation input body comprising a rotation lever, which is horizontally provided at one end portion and whose front end portion is an input portion pressed against the lock operation member, and is externally fitted to the rotation shaft and integrated with the rotation shaft. The upper and lower end surface cam body is formed into an end surface cam whose height is monotonously increased and decreased when the upper end surface and the lower end surface thereof move in the circumferential direction. And an output body that is loosely fitted to the rotation shaft and whose rotation is restricted, is slidable in the vertical direction with respect to the rotation shaft, and is provided with an output portion that drives the operating member. The cam and flange of the end face cam of the upper and lower end face cam body are respectively attached to the base body and the output body. Locking device of the drawer in the storage furniture made by providing a lower. The storage furniture according to claim 1 or 2, wherein an elastic member for urging the output body in the direction of the end face cam body is provided in the base, and the elastic member is used as an elastic member for urging the operating member in the unlocking direction. Drawer lock device.

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