JP5339264B2 - Safety lock mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety locking mechanism capable of prohibiting such a state that at least two drawers are simultaneously drawn out by a structure capable of securing the stable and secure operation even after long-time use while hardly causing looseness, and capable of being hardly affected by the temperature change. <P>SOLUTION: A plurality of shaft members 3, 4, 5 and 5' are disposed in such a way as stacked on the same axis m of the safety locking mechanism. When the drawer 2 is drawn out, the corresponding shaft member 3 is locked to the drawer 2 and the posture of the shaft member 3 is changed, causing the substantial increase of the dimensions in the axial direction of the whole shaft member after the passage of the drawer 2. Then, by pushing in the drawer 2, the state of the changed posture of the shaft member 3 is eliminated, so that the increase of the dimensions in the axial direction of the whole shaft member 3 is eliminated. The safety locking mechanism also has a restricting means 6 for restricting the increase of dimensions in the axial direction of the whole shaft member, and the quantity of increase is restricted approximately to the quantity of increase of the dimensions in the axial direction caused by the drawing motion of one drawer. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a safety lock mechanism that can appropriately prevent two or more drawers from being pulled out simultaneously through a smooth operation.

  Conventionally, when a plurality of drawers housed in a housing are pulled out simultaneously, the center of gravity moves forward, which may cause the housing to fall forward. For this reason, various safety lock mechanisms have been developed so that the second drawer cannot be pulled out after one drawer is pulled out.

For example, in Patent Document 1, a protrusion is provided for each drawer, while a cabinet body is provided with a vertically movable support column and a cam with an inclined groove provided on the support column corresponding to each flange member. When the drawer is pulled out, the hook member engages with the inclined groove of the cam and lifts the column, and even if an attempt is made to pull out the second drawer in this state, the hook member is blocked by the displaced cam. So that the safety lock state is realized.
JP 2001-342770 A

  However, in such a structure, when two drawers are to be pulled out one after the other, the drawer hook member to be pulled out later is blocked by the cam and the safety lock mechanism works reliably. When pulling out at the same time, the struts are lifted with these flange members simultaneously engaged with the inclined grooves of the cam. As a result, both drawers can be pulled out, and the safety lock function cannot be fully achieved. There is a problem. Moreover, since the whole support | pillar always operate | moves up and down, some device is needed also in terms of an operation load.

  On the other hand, when one drawer is pulled out, the rotating cam plate pivotally attached to the substrate provided on the inner surface of the side plate of the housing is rotated by a protrusion protruding from the side surface of the drawer, The middle part of the wire stretched up and down on the substrate is pushed forward or backward, and the turn of the turning cam plate corresponding to the other drawer is prevented by the tension of the wire at that time. According to this, it is possible to prohibit a plurality of drawers from being pulled out sequentially or simultaneously, and it is considered that it is advantageous in terms of operating resistance because it only tensions a lightweight wire.

  However, when using a wire, it cannot be denied that the safety lock state and the all lock state due to its flexibility will be fluctuating, and there is also a problem that the operation is likely to be affected by long-term use, temperature elongation, etc. is there.

  The present invention has been made paying attention to such a problem, and can reliably prevent two or more drawers from being drawn at the same time regardless of the operation procedure, and can reduce the operating resistance. Furthermore, the main purpose is to realize a new and useful safety lock mechanism that is structurally free of backlash, can ensure stable and reliable operation even with long-term use, and is hardly affected by temperature changes. At the same time, the object is to easily add an all-lock function that appropriately locks all drawers using such a structure.

  In order to achieve this object, the present invention takes the following measures.

In other words, safety lock mechanism of the present invention is arranged to stack a plurality of shaft members on the same axis, attitude change Kakari' shaft member to the extraction for orientation changes corresponding to when the drawer is pulled out The displacement-inducing member adjacent to the posture-changing shaft member causes displacement in the axial direction according to the posture of the posture-changing shaft member. An increase in the axial dimension is caused, and by pushing the drawer, the posture change state of the axial member for changing the attitude is eliminated, and the increase in the axial dimension of the entire shaft member disappears. A restricting means for restricting the increase in the axial dimension is provided, and the increase amount is substantially restricted to the increase amount in the axial dimension caused by the pulling-out operation of one drawer.

With this configuration, there is no white operation of the shaft member for the attitude change in the state of pulling out one drawer, the shaft member for the attitude change to cope with the attempt to get a second lead can not be changed attitude, As a result, the drawing operation is prohibited, and the safety lock function works effectively. In addition, when two or more drawers are to be pulled out simultaneously, even if the corresponding posture changing shaft members attempt to change the posture at the same time, when the sum of the increase in the axial dimension caused by them exceeds the regulation value as a whole, Since further posture changes of the shaft member for posture change are restricted, simultaneous drawing is also prohibited.

In this case, a plurality of shaft members are stacked to operate a posture changing shaft member corresponding to a specific drawer and a posture changing shaft member corresponding to the drawer located above the shaft member, so that it is in a high position. As the upper drawer is used more frequently, the operation load is smaller, and the pulling operation is not prohibited by the tension of the bending member such as a wire, but is prohibited by the rigidity of the shaft member. In addition, it is possible to achieve a configuration in which rattling is not generated as much as possible, and it is possible to ensure a stable and smooth operation even with long-term use and a structure that is hardly affected by temperature changes.

In this case, it does not matter which of the displacement-inducing shaft member and the posture-changing shaft member actually causes the displacement operation. Of course, those in which both are displaced are also included.

  In this case, as a specific embodiment for accurately reducing the operating load, the shaft member for posture change can be horizontally rotated around the shaft center and slidable in the shaft center direction, and a shaft for inducing displacement The member is not horizontally rotatable around the shaft center and is slidable in the axial direction, and an inclined surface is formed between the end faces of both shaft members with unevenness, and the unevenness of the inclined surfaces of both shaft members is related to each other. From the combined state, the projections abut each other when the shaft member for posture change rotates, so that a relative displacement in the axial direction between the shaft member for inducing displacement and the shaft member for posture change is generated. Things.

  Of course, in addition to such a horizontal rotation operation, the posture changing shaft member can cause the same effect by a vertical rotation operation around the horizontal axis.

  In order to reduce the manufacturing cost and realize a compact configuration, in addition to the shaft member for changing the posture and the shaft member for inducing displacement, a shaft member for transmitting displacement is interposed in part. It is desirable to keep it.

  In the above, in order to ensure a smooth operation of the shaft member in the axial direction, it is preferable to provide a guide member that guides the plurality of shaft members so as to be slidable in the axial direction.

  Further, in order to provide the above-described safety lock mechanism with an all-lock function through a simple configuration, in a state where the drawer is not pulled out, a position where the increase in the axial dimension of the entire shaft member is allowed and a position where it is prohibited. It is effective to provide a lock member that can be selectively moved between the two.

  Furthermore, in order to appropriately cope with errors caused by stacking a plurality of shaft members as described above, the restricting means includes an adjusting unit that adjusts a restricting position with respect to an increase in the axial dimension of the entire shaft member. It is desirable.

  Since the safety lock mechanism of the present invention has the above-described configuration, it is possible to effectively prohibit two or more drawers from being pulled out at the same time regardless of the operation procedure. It is possible to realize a new and useful safety lock mechanism that is less likely to be rattled in operation, can ensure stable and reliable operation even after long-term use, and is hardly affected by temperature changes. Further, according to the present invention, by using such a configuration of the safety lock mechanism, an all lock function can be easily and effectively added, and rattling at the time of locking can be appropriately suppressed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The storage device shown in FIG. 1 has a plurality of drawers 2 attached to a housing 1 through a rail mechanism (not shown) so that it can be put in and out. As shown in FIG. A safety lock mechanism SL that prohibits two or more drawers 2 from being pulled out sequentially or simultaneously is formed between the outer surface and the outer surface. In FIG. 2, only the uppermost drawer 2 is indicated by an imaginary line, but the basic structure of the other drawers 2 is the same.

  That is, the drawer 2 is provided with the end plate 22 on the front side of the drawer main body 21, and the side plate 21 a constituting the drawer main body 21 is for operating the safety lock mechanism SL as shown in FIGS. 2 and 5. A protrusion 23 a is provided as a part of the drawer 2. The protrusion 23a of this embodiment is formed in a part of the resin member 23, and the resin member 23 is attached in a state of being fitted into the side plate 21a of the drawer body 21.

  On the other hand, as shown in FIGS. 2 to 4, the component on the housing 1 side that constitutes the safety lock mechanism SL includes a plurality of components arranged so as to be stacked on the same axis m on the inner surface of the side plate 11 of the housing 1. The shaft members 3, 4, and 5 are mainly used. Specifically, upper and lower end members 61 and 62 are fixedly disposed in a recess 11 a provided in the side plate 11 of the housing 1 via a substantially channel-shaped attachment 12, and the present invention is interposed between the end members 61 and 62. A prismatic shaft member 63 serving as a guide member is disposed, and a posture change shaft member 3, a displacement inducing shaft member 4, and a displacement transmission shaft are disposed on the shaft member 63. The member 5 is externally fitted. In the case of this embodiment, each shaft member 3, 4, 5 is made of a resin material.

  The posture changing shaft member 3 is arranged such that at least the main body 31 is formed in a columnar shape so as to be rotatable with respect to the shaft center member 63 at the corresponding position of each drawer 2 and to be slidable in the direction of the shaft center m. As shown in enlarged views in FIGS. 4 and 7, etc., concave and convex slopes (tapered surfaces) 32 that change in a wavy shape along the circumferential direction are formed on both upper and lower end surfaces. The shaft member 3 is hollow, and the inclined surface 32 is a group of lines extending from the axis m except for the hollow portion.

  And the cam 7 is comprised so that it may rotate integrally around the shaft center m of the said shaft center member 63 using some shaft members 3 for this attitude | position change. As shown in FIGS. 4 and 5, the cam 7 has an opening 71 on the peripheral wall of the shaft member 3 in a direction perpendicular to the axis m, and the opening 71 is a part of the drawer 2. The protrusion 23a is engaged during the loading / unloading operation, and the opening 71 is accommodated in the normal position of the shaft member 3 (corresponding to the pushing-in of the drawer 2) as shown in FIGS. 5 and 6 (a). As seen from the front of the head, it faces diagonally rearward, and when pulling out the drawer 2, the protrusion 2a of the drawer 2 as shown in FIG. 6 (a) → (b) → (c) → (d) → (e) The cam 7 is rotated to cause the shaft member 3 to rotate horizontally from the normal position to the corresponding position at the time of withdrawal. The opening 71 of the cam 7 faces obliquely forward and the protrusion 23a can be separated from the opening 71 at the corresponding position when the shaft member 3 is pulled out after the drawer 2 has passed. When the drawer 2 is pushed in, the cam 7 is reversely rotated by the protrusion 23a of the drawer 2 as shown in FIG. 6 (e) → (d) → (c) → (b) → (a). The member 3 can be caused to rotate horizontally to return to the normal position from the corresponding position when pulled out. As shown in FIG. 4, the cam 7 is closed above the opening 71 by a top 72, and restricts the protrusion 23 a from coming out of the opening 71.

  As shown in FIGS. 2 to 4, the displacement-inducing shaft member 4 is rotatable with respect to the shaft member 63 at the vertically adjacent position so as to contact the posture changing shaft member 3 and in the direction of the shaft center m. The body portion 41 that faces at least the posture changing shaft member 3 is disposed in a non-slidable manner, and has a cylindrical body shape. The end surface of the main body portion 41 adjacent to the posture changing shaft member 3 is As shown in an enlarged view in FIGS. 4 and 7, an uneven slope (tapered surface) 42 that changes in a wavy shape along the circumferential direction is formed. The shaft member 4 is also hollow, and the inclined surface 42 has a mountain and valley, and a valley and mountain that coincide with the inclined surface 32 at a certain rotational phase. The shaft member 4 for changing the posture is attached in a state in which the engaging protrusion 43 provided on the side end surface is engaged with the front wall 12a provided on a part of the channel-shaped attachment 12 shown in FIG. It is prohibited and slide operation is allowed in the direction of the axis m. The displacement-inducing shaft members 4 positioned above and below the posture-changing shaft member 3 are symmetrical with each other.

  The uneven slopes 32, 42 formed on both shaft members 3, 4 are as shown in FIG. 7 (a) when the shaft member 3 for posture change is in the normal position of FIG. 6 (a). When the protrusions and recesses are engaged, that is, the peaks and valleys are closely related to each other without a gap, and the posture-changing shaft member 3 changes its posture to the corresponding position at the time of drawing shown in FIG. As shown in FIG. 7 (b), the mountains and the mountains collide with each other, and a gap is set between the valleys. In the case of this embodiment, at the position where the projections shown in FIG. 7B meet, a minute recess 3a that receives the tip of the other projection at the tip of one projection (see FIGS. 4 and 7B). Is provided.

  As shown in FIGS. 2 and 3, the displacement transmitting shaft member 5 includes a displacement-inducing shaft member 4 associated with the lower-stage drawer 2 and a displacement-inducing shaft associated with the upper-stage drawer 2. An elongated pipe-like member disposed so as to be slidable at least in the axial direction with respect to the shaft center member 63 while being in contact with the member 4. The vertical displacement generated is transmitted to the displacement-inducing shaft member 4 located in the upper stage to interlock the vertical displacement. An expanded displacement transmission shaft member 5 ′ is provided at the upper end of the displacement transmission shaft member 5 located at the uppermost position. This shaft member 5 'utilizes the structure of the shaft member 4 for inducing displacement located above the shaft member 3 for posture change, and is basically the same.

  That is, for example, when the uppermost drawer 2 is pulled out, the inclined surfaces 32 and 42 are generated as the shaft member 3 corresponding to the drawer 2 rotates horizontally as shown in FIGS. When the shaft member 3 is changed in posture as shown in FIGS. 8 (a) → (b) until the projections of the projections abut each other, one displacement-inducing shaft member 4 adjacent to the posture-changing shaft member 3 is crested. Relative displacement is caused in the axial direction by an amount corresponding to the pitch of the valleys, and a relative displacement twice as large as that appears between the displacement-inducing shaft members 4 adjacent to the upper and lower sides of the posture-changing shaft member 3. The shaft members 4, 5, 5 ′ including the shaft member 3 and positioned above slide in the direction of the axis m, whereby the entire shaft member (from the shaft member 4 for inducing displacement at the lowermost stage to the shaft member at the uppermost stage) The axial dimension L (up to 5 ') is substantially increased by ΔL. When the drawer 2 is pushed in, the corresponding shaft member 3 is released from the posture change state as shown in FIGS. 8B to 8A, and the increase amount ΔL of the axial dimension L of the entire shaft member disappears. Become. FIG. 8 (c) shows the operating state when the middle drawer 2 is pulled out, and FIG. 8 (d) shows the state where the lowermost drawer 2 is pulled out, each including the corresponding shaft member 3 and positioned above it. The shaft members 4, 5, 4, 3... To slide in the direction of the axis m, thereby obtaining a substantial increase ΔL of the axial dimension L of the entire shaft member.

  In this embodiment, as shown in FIGS. 2, 3, and 8, the upper and lower end members 61, 62 function as the restricting means 6 that restricts the increase in the axial dimension L of the entire shaft member. The increaseable range is substantially restricted by the axial increase amount ΔL that accompanies the drawing operation of the two drawers 2. That is, in the state where the drawer 2 is pushed in, the shaft members 3, 4, 5, 5 ′ are sequentially stacked on the lower end member 62 by their own weights, and the uppermost shaft member 5 ′ and the upper end member are stacked. A gap S (see FIG. 10) corresponding to a substantial increase amount ΔL of the entire shaft member that is generated when one drawer 2 is pulled out is formed between the first and second drawers 61. When any of the drawers 2 is pulled out, the posture changing shaft member 3 corresponding to the drawer 2 changes its posture as shown in FIGS. As a result of increasing the directional dimension L, the gap S is configured to be filled in any case, and even if an attempt is made to draw the next drawer 2 in that state, there is no gap S. Even if the overall axial dimension L cannot be increased and the protrusion 23a enters the opening 71 of the cam 7, the rotation of the other shaft member 3 for changing the posture, that is, the rotation of the cam 7 is restricted. ) → Drawing operation of drawer 2 toward (e) is prohibited. That is, the size of the gap S provides a regulation value that regulates an increase in the axial dimension L of the entire shaft member.

  Further, as shown in FIG. 9, when two or more drawers 2 are to be pulled out simultaneously, even if the corresponding shaft members 3 and 3 attempt to change their postures at the same time, the total amount of increase ΔL of the axial dimension L caused by them is As a whole, when the regulation value corresponding to the gap S is exceeded, further change in the attitude of the shaft members 3 and 3 is regulated, so that the shaft members 3 and 3 are at most intermediate between FIGS. 6B and 6C. It can only rotate to the position, and the simultaneous withdrawal of drawers 2 and 2 is effectively prohibited.

  As shown in FIG. 10, the lower end member 62 constituting the restricting means 6 is provided with an adjusting portion 8 for adjusting a restricting position, that is, a restricting value with respect to an increase in the axial dimension L of the entire shaft member. The adjusting portion 8 is a member in which a screw member 81 is screwed to the lower end member 62 so as to be movable up and down. The screw member 81 supports the shaft member 4 for inducing displacement that is positioned at the lowest level. By changing the position, the size of the gap S existing above can be adjusted. That is, the restriction for restricting the increase in the axial dimension L of the entire shaft member is strictly performed between the upper end of the screw member 81 attached to the lower end member 61 and the lower surface of the upper end member 62. Yes.

  Further, in the present embodiment, a lock member 91 shown in FIGS. 2, 3 and 11 is provided to lock all the drawers 2 using the safety lock mechanism SL. The lock member 91 is disposed so as to be able to advance and retreat to a position facing the gap S, and one end portion 91a is engaged with an arm 92 attached to the side plate 11 of the housing 1 around the support shaft 92a. 92 is connected to a driving body 94 disposed near the center in the width direction of the top plate 12 via a shaft 93 incorporated in the top plate 12 of the housing 1 shown in FIG. When the cylinder lock 24 which is a locking portion provided on the uppermost drawer 2 is operated, the drive body 94 pushes up the dead bolt 24a shown in FIG. As a result of rotating together with the shaft 93, the arm 92 is rotated thereby to move the lock member 91 forward and backward. The lock member 91 has a wall portion 91b as shown in FIG. 11 at a position eccentric from the forward / backward center, and the wall portion 91b erodes the gap S at the retracted position shown in FIGS. 11 (a) and 11 (b). First, the upper end 5a 'of the displacement transmitting member 5' can enter the gap S. However, when the cylinder lock 24 is operated and the lock member 91 moves to the locking position shown in FIG. It enters a position where at least a part of the gap S is filled, blocks the entry of the upper end 5a 'of the displacement transmission member 5', and prohibits the displacement transmission member 5 'from rising. The lock member 91 is supported by a bearing member 90 disposed on the fixture 12 so as to advance and retreat. In this case as well, as described above, even if the projection 23a enters the opening 71 of the cam 7, the rotation of the other shaft member 3 for changing the posture, that is, the rotation of the cam 7, is restricted. The pull-out operation of the drawer 2 toward e) is prohibited. 91x is a spring that offsets the locking member 91 in the non-locking direction, and 5x 'is a spring that offsets the shaft members 3, 4, 5, 5' in the all-lock releasing direction.

  As described above, the safety lock mechanism SL of the present embodiment is arranged so that the plurality of shaft members 3, 4, 5, 5 ′ are stacked on the same axis m on the inner surface of the housing 1, and the drawer 2 When the shaft member 3 is pulled out, the posture of the shaft member 3 is changed with respect to the drawer 2 to cause a substantial increase in the axial dimension L of the entire shaft member after passing through the drawer 2, and the A configuration is provided so that the change in the posture of the shaft member 3 is eliminated and the increase in the axial dimension L of the entire shaft member 3 disappears, and a restricting means 6 is provided for restricting the increase in the axial dimension L of the entire shaft member. The amount of increase is almost restricted to the amount of increase ΔL in the axial dimension that occurs with the operation of pulling out one drawer.

  By configuring in this way, there is no room for operation in the state where one drawer 2 is pulled out, and the corresponding shaft member 3 cannot change its posture even if it tries to pull out the second drawer 2, thereby prohibiting the drawer operation. Thus, the safety lock function works effectively. In addition, when two or more drawers 2 are to be pulled out simultaneously, even if the corresponding shaft member 3 tries to change the posture at the same time, when the total amount of axial dimension increase ΔL caused by them exceeds the regulation value as a whole, Since the change in the posture of the shaft members 3 and 3 is restricted, simultaneous drawing is also prohibited.

  In this case, the plurality of shaft members 3, 4, 5, 5 'are stacked to operate the shaft member corresponding to the specific drawer 2 and the shaft member corresponding to the drawer located above the shaft member. The upper side drawer, which is frequently used, requires less operating load, and is not prohibited from being pulled out by the tension of a flexible member such as a wire, but by the rigidity of the shaft members 3, 4, 5, 5 '. Since the pull-out operation is prohibited, it can be configured so that rattling does not occur as much as possible, and stable and smooth operation can be ensured even with long-term use, and it is highly reliable and not affected by temperature changes. It can be a structure.

  Then, the shaft member corresponding to the drawer 2 is used as a shaft member 3 for posture change, and the displacement in the axial center m direction is applied to the shaft member 3 for posture change according to the posture of the shaft member 3 for posture change. Since the shaft members 4 for inducing displacement are adjacent to each other so as to cause the increase, the substantial increase in the axial dimension L of the entire shaft members can be accurately caused with these shaft members 3 and 4 being stacked. Can do.

  Specifically, the posture changing shaft member 3 can be horizontally rotated around the axis m and can be slid in the direction of the axis m, and the displacement-inducing shaft member 4 cannot be rotated horizontally around the axis m. Slopes 32 and 42 that are slidable in the center m direction and are engaged with each other by unevenness are formed between the end surfaces of both shaft members 3 and 4, and the unevennesses of the slopes 32 and 42 of both shaft members 3 and 4 are formed. Since the projections abut each other during the rotation of the posture changing shaft member 3, the relative displacement in the axis m direction between the displacement-inducing shaft member 4 and the posture changing shaft member 3 is changed. Since it is configured to occur, the operation of increasing the axial dimension L of the entire shaft member can be effectively realized from the advance / retreat operation of the drawer 2 through a simple structure, and the lower stage is converted from the rotation to the axial displacement. The operating load is also accurate when pulling out the drawer 2 located at It can be reduced.

  In this case, in order to form the slopes 32 and 42 that are engaged with the concave and convex portions, the posture changing shaft member 3 and the displacement inducing shaft member 4 both require a certain size in the radial direction. The shaft member 5 for displacement transmission to be employed is not required to have a radial dimension. Therefore, the axial dimension of the shaft member 3 for posture change and the shaft member 4 for inducing displacement is minimized to be convenient for molding and the like, and at the same time, the shaft member 4 for transmitting displacement is made as small as possible. As a whole, the material can be reduced and a compact design can be realized.

  Further, since the shaft center member 63 is provided as a guide member that guides the plurality of shaft members 3, 4, 5, 5 'so as to be slidable in the axial direction, the shaft members 3, 4, 5, 5' are provided. Smooth operation when stacked and slid in the axial direction can be ensured.

  In addition to the above, in the present embodiment, the lock member 91 is selectively movable between a position where the increase in the axial dimension L of the entire shaft member is allowed and a position where it is prohibited in a state where the drawer 2 is not pulled out. Since the safety lock mechanism SL is used to the maximum, the all-lock function for all the drawers 2 can be realized simply by assembling the lock member 91 to a part of the safety lock mechanism SL. Compared to the case, it is possible to appropriately suppress the play at the time of locking.

  Furthermore, since the restricting means 6 includes the adjusting portion 91 that adjusts the restricting position with respect to the increase in the axial dimension L of the entire shaft member, even if minute design assembly errors are accumulated due to stacking, the adjusting portion 91. Through this, it is possible to accurately perform the overall adjustment so that an accurate operation can be obtained.

  The specific configuration of each unit is not limited to the above-described embodiment.

  For example, in the above-described embodiment, the shaft member 3 for inducing displacement is arranged adjacent to each other in the vertical direction with respect to one shaft member 3 for posture change, but the shaft member 4 for inducing displacement is used for one posture change. Of course, one shaft member 4 may be provided.

  In the above embodiment, the shaft member 63 as a guide member extends to a position penetrating each shaft member. However, the shaft member 63 may be partially divided, or like a guide member 163 shown in FIG. Furthermore, it may be a cylindrical member that is fitted to the outside of each of the shaft members 3, 4. In short, the form is not limited as long as the shaft members 3, 4.

  The cam 7 can also be rotated around another axis parallel to the axis m and transmitted to the shaft member 3 via a spur gear mechanism or the like.

  Further, as shown in FIG. 13, a cam 107 is provided in association with the shaft member 3 so as to be rotatable around an axis n perpendicular to the axis m, and when the drawer 2 is pulled out, the cam 107 It is also possible to transmit the rotation to the corresponding shaft member 3 via the gear mechanism 107a or the like and cause the shaft member 3 to rotate horizontally.

  The posture changing shaft member is not limited to horizontal rotation but may be vertical rotation.

  Furthermore, in addition to the posture changing operation as described above, the shaft member corresponding to the drawer itself moves in the axial direction as the drawer moves, resulting in an increase in the substantial axial dimension of the entire shaft member. It can also be made into an aspect. When the shaft member itself moves, that is, when a so-called “moving shaft member” is employed, there is no need to combine the posture-changing shaft member and the displacement-inducing shaft member. In this case, only the displacement transmitting shaft member may be interposed, or the moving shaft member may be directly driven by the moving shaft member.

  Other configurations can be variously modified without departing from the spirit of the present invention.

The perspective view of the storage device to which the safety lock mechanism concerning one embodiment of the present invention is applied. The partially expanded perspective view which abbreviate | omitted one part which shows the side-plate inner surface of the housing | casing which comprises the storage device, and its periphery structure. FIG. 3 is an exploded perspective view of FIG. 2. The elements on larger scale of FIG. FIG. 4 is a schematic plan view showing a relationship between a part of the drawer and the cam in the embodiment. Operation | movement explanatory drawing corresponding to FIG. The figure for demonstrating the process in which axial displacement arises from rotation of a shaft member in the embodiment. The figure for demonstrating the relationship between the drawer state of a drawer and the change of the axial direction dimension of a shaft member in the embodiment. The figure for demonstrating the relationship between the other drawer state of drawer | drawing-out and the change of the axial direction dimension of a shaft member in the embodiment. The figure which shows the structure of the adjustment part in the embodiment. The figure which shows the structure of the locking member in the embodiment. The figure which shows the modification of this invention. The figure which shows the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Drawer 3 ... Shaft member corresponding to drawer (shaft member for posture change)
3a ... recess 4 ... adjacent shaft member (shaft member for inducing displacement)
5 ... Shaft member for displacement transmission 6 ... Restricting means 7, 107 ... Cam 8 ... Adjusting part 23a ... Part of drawer (projector)
32a, 42a ... slope 63 ... guide member (axial center member)
71: Opening 91: Locking member L: Substantial axial dimension of the entire shaft member ΔL: Increase amount m: Shaft center

Claims (6)

Arranged so as to stack a plurality of axial members coaxially, the shaft member for the corresponding posture change when the drawer is pulled out to change posture in Kakari' the drawer, the shaft member for the attitude change Depending on the posture, the displacement-inducing member adjacent to the posture-changing shaft member causes displacement in the axial direction, thereby causing a substantial increase in the axial dimension of the entire shaft member after passing the drawer, A restricting means for restricting an increase in the axial dimension of the entire shaft member while being configured to eliminate the increase in the axial dimension of the entire shaft member by eliminating the attitude change state of the shaft member for attitude change by pushing Is provided, and the amount of increase is substantially restricted to the amount of increase in the axial dimension caused by the operation of pulling out one drawer. The posture changing shaft member can be rotated horizontally around the axis and slidable in the axial direction, and the displacement-inducing shaft member cannot be rotated horizontally around the axis and slidable in the axial direction. By forming slopes that engage with each other in an uneven manner between the end faces of the shaft members, the projections abut each other when the shaft members for posture change are rotated from the state in which the unevenness of the slopes of these shaft members are engaged with each other. , the shaft member and the axial direction of the safety lock mechanism of claim 1, wherein the relative displacement is configured to produce the shaft member for the attitude change for displacement induced. 3. The safety lock mechanism according to claim 1, wherein a shaft member for transmitting displacement is interposed in part in addition to the shaft member for posture change and the shaft member for inducing displacement. The safety lock mechanism according to any one of claims 1 to 3, further comprising a guide member that guides the plurality of shaft members to be slidable in the axial direction. The lock member is provided so as to be selectively movable between a position where the increase in the axial dimension of the entire shaft member is allowed and a position where the extension is prohibited in a state where the drawer is not pulled out . safety lock mechanism according to. The safety lock mechanism according to any one of claims 1 to 5, wherein the restricting means includes an adjusting portion for adjusting a restricting position with respect to an increase in the axial dimension of the entire shaft member.

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