JP4930327B2 - Electronic equipment rack and drawer control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rack for electronic units and a pull-out controller, capable of freely changing the pull-out limit number of pull-out sections and improving handleability and an added value. <P>SOLUTION: The rack 1 for the electronic equipment includes pulleys 22 for units provided in two or more units 11, a plurality of pulleys 23 for a case body provided in the case body 10, a wire 21 disposed to the pulleys 22 for the units and the pulleys 23 for the case body, and a wire length adjusting means 25 for adjusting the length of the wire 21, and control is executed so as to pull out the prescribed quantity of the wire 21 corresponding to the length of the wire 21. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an electronic equipment rack and a drawer control device that can freely set the drawer limit number.

In recent years, electronic devices such as servers have been reduced in size and configured as a single unit. As a result, when installing, a plurality of units can be collectively mounted on an electronic equipment rack. Generally, this electronic equipment rack has a structure in which the unit can be pulled out of the rack using a slide rail or the like in order to maintain the inside of the unit.
When pulling out a unit from the rack, if a plurality of units are pulled out at once, the center of gravity of the electronic device rack may be inclined, and the electronic device rack may fall over. For this reason, a technique for automatically limiting the number of mechanisms for pulling out prevention and the number of units to be pulled out is required.

As a technique related to the above-described fall prevention, there is a technique of a stabilizer (support leg) for preventing the fall. According to this technology, since the unit is pulled out after attaching the stabilizer for preventing overturning to the electronic equipment rack, the electronic equipment rack can be reliably prevented from overturning.
The stabilizer is configured to be folded and stored in an electronic equipment rack, or to be provided with a stabilizer separate from the electronic equipment rack. Such a technique is simple and reliable, but the operator may forget to install the stabilizer.
For this reason, various techniques have been proposed.

For example, in Patent Document 1 and Utility Model Documents 1 to 4, the number of drawers that can be pulled out is automatically set by winding or locking a string-like body such as a wire around each drawer. A technique for restricting to the above is disclosed.
Patent Documents 2 and 3 and Utility Model Document 5 disclose techniques for limiting the number of drawers that can be pulled out by mechanical means using a plate-like member or a rod-like member.
According to the above technologies, by limiting the number of drawers that can be pulled out, the amount of change in the center of gravity of racks, shelves, etc. is reduced, the risk of falling is avoided, and work safety is ensured. can do.

By the way, electronic devices such as servers in recent years have been diversified, and units incorporating these electronic devices have various shapes and the like. In addition, due to technological progress, an electronic equipment rack that houses these units may need to be added in stages, or a part of the unit may need to be replaced with a unit of a different size or weight.
JP-A-1-107707 JP 2003-144254 A Japanese Patent Application Laid-Open No. 09-028484 Japanese Utility Model Publication No. 01-133436 Japanese Utility Model Publication No. 61-118432 Japanese Utility Model Publication No. 59-169741 Japanese Utility Model Publication No. 02-084532 Japanese Utility Model Publication No. 02-011381

  However, the techniques disclosed in Patent Document 1 and Utility Model Document 1 described above are techniques that can be applied to a case where the drawer portion has two or three stages, and there is a problem that the drawer section cannot be further multistaged. It was.

In addition, the techniques of Utility Model Documents 2 and 3 can change the number of drawers that can be pulled out by changing the fixing positions of the stop pieces and the fixed stoppers. However, changing the fixing position of the restraining piece or the fixing stopper fixed to the back wall of the file case main body or the casing requires a large change work. The reason is that the stop piece and the fixed stopper are provided on the inner side of the back wall, and the changing operation cannot be performed unless the corresponding drawer portion is removed. Therefore, for example, if the drawer unit is a unit in which an electronic device is stored and has already been installed, it is practically impossible to perform the above change work for changing or adding units. There was a problem.
Further, the technique of Utility Model Document 4 has a problem that the length of the flexible connecting member cannot be easily changed, and thus the number of drawer portions that can be pulled out cannot be easily changed.

  Moreover, since the techniques of Patent Documents 2 and 3 and Utility Model Document 5 require a complicated mechanism, there is a problem in that the manufacturing cost cannot be reduced. Furthermore, in order to respond flexibly to changes in the number of drawer parts (for example, units with different height dimensions) and the number of drawer parts mounted in various shapes, dedicated mechanical parts are required for each configuration. There was a problem that it was actually difficult.

  In order to solve the above problems, an object of the present invention is to provide an electronic equipment rack and a drawer control device that can freely change the number of drawers to be pulled out and can improve usability and added value.

  In order to achieve the above object, a drawer control device according to the present invention includes a drawer portion winding portion provided in two or more drawer portions, a plurality of substrate winding portions provided in the substrate, and a drawer portion. A string-like body wound around the winding part for the base and the base-wound part, and a string-like body length adjusting means for adjusting the length of the string-like body, according to the length of the string-like body, Control is performed so that a predetermined number of drawers are pulled out.

The present invention is also effective as an invention of an electronic equipment rack.
The rack for electronic devices of the present invention is a rack for electronic devices in which units as drawer portions are arranged in multiple stages, and has a drawer control device according to any one of claims 1 to 6. is there.

  According to the electronic equipment rack and the drawer control device of the present invention, the predetermined quantity with which the drawer part is pulled out can be freely changed, the usability and added value can be improved, and the size and quantity of the drawer part can be improved. Can be optimized freely.

[One Embodiment]
FIG. 1a is a schematic top view for explaining an electronic equipment rack according to an embodiment of the present invention.
Moreover, FIG. 1b has shown AA sectional drawing of FIG. 1a.
Further, FIG. 1c shows a cross-sectional view along line BB of FIG. 1a.
1a, 1b, and 1c, an electronic equipment rack 1 includes a housing 10, a unit 11 serving as a drawer portion, and a drawer control device 2 that are arranged on the housing 10 in seven stages. Yes.

The housing 10 includes a substantially square bottom plate 101 and an upper plate 102, four columns 103 that connect these corners, and casters 104 provided on the bottom surfaces of the four corners of the bottom plate 101. Further, the casing 10 of the present embodiment is provided with an elongated flat-plate casing pulley mounting plate 105 connected to the bottom plate 101 and the upper plate 102 on the back side and the right side. Further, a winder wheel mounting plate 106 that is bent in a bowl shape when viewed from above is fixed to the front and right support columns 103.
Further, a support member (not shown) such as a slide rail is usually attached to the support column 103. This support member supports the unit 11 so that it can be pulled out with respect to the housing 10. In FIGS. 1 a, 1 b, and 1 c, the support member is omitted for easy understanding of the structure of the drawer control device 2.

Each unit 11 of the present embodiment has a rectangular shape having the same shape and size, and each stores an electronic component or the like (not shown).
In the present embodiment, the number of the units 11 is seven. However, the number is not limited to this, and it is only necessary to have two or more units 11.

The drawer control device 2 includes a wire 21, a unit pulley 22, a housing pulley 23, a reel 24, and a wire length adjusting means 25.
As shown in FIG. 1C, the unit pulley 22 as the drawing-out portion winding portion is rotatably provided on the back side of the right side surface of the unit 11. When all the units 11 are stored in the housing 10, the unit pulleys 22 are arranged at a predetermined pitch in the vertical direction.

The housing pulley 23 serving as the base winding portion is rotatably provided on the housing pulley mounting plate 105 corresponding to each unit pulley 22. That is, the housing pulley 23 has the same position in the left-right direction as the unit pulley 22 (see FIG. 1a), and the vertical position is higher than the unit pulley 22 (with a predetermined pitch of the unit pulley 22). It is located below (by half the distance) (see FIG. 1c), and further, the front and back direction positions are located on the back side from the unit pulley 22 (see FIG. 1c).
In addition, the winding part for drawer | drawing-out part and the winding part for base | substrates are not limited to a pulley as mentioned above, The member (for example, ring) which can wind a string-like body may be sufficient. However, since the pulley rotates smoothly and does not generate a large frictional resistance, the unit 11 can be easily pulled out.

The reel 24 as tension applying means is connected to the tension applying wheel 241 and the tension applying wheel 241 so that the tension applying wheel 241 is counterclockwise (referred to as a biasing direction as appropriate (see FIG. 1c)). And a spring (not shown) to be rotated. The reel 24 rotates the tension applying wheel 241 with the force of the spring, and winds the excess wire 21 around the tension applying wheel 241. Thereby, tension | tensile_strength is assign | provided to the wire 21 and the malfunction that the wire 21 gets caught in something by slack, or becomes entangled is prevented.
In addition, the reel 24 of the present embodiment reliably applies tension to the wire 21 and winds up the excess wire 21 around the tension applying wheel 241, so that the length of the exposed wire 21 can be shortened, and the appearance Is refreshing.

  The wire length adjusting means 25 as the string-like body length adjusting means includes a winding wheel 251, a dial 252, a pawl wheel 253, and a pawl lever 254. The wire length adjusting means 25 adjusts the length of the wire 21 by winding the wire 21 around the winding wheel 251 or sending out the wound wire 21.

In the present embodiment, the pawl wheel 253, the winding wheel 251 and the dial 252 are integrally formed and are rotatably provided on the winding wheel mounting plate 106. Further, the pawl wheel 253, the pawl lever 254, and the like constitute a ratchet and restrict the rotation of the winding wheel 251.
That is, in FIG. 1 c, when the dial 252 is rotated counterclockwise, the winding wheel 251 winds the wire 21. At this time, the pawl wheel 253 is sequentially locked by the pawl lever 254, so that the wound wire 21 maintains the wound state. When the operator pulls the pawl lever 254 in the front direction, the pawl wheel 253 is unlocked, the winding wheel 251 rotates in the clockwise direction, and the wound wire 21 is sent out. If it does in this way, the length of the wire 21 can be adjusted easily and operativity can be improved.

Preferably, a pawl lever 254 that is an operation portion of the wire length adjusting means 25 is provided on the side of the electronic device rack 1 in the pulling direction. Here, the drawing direction side refers to a region in the drawing direction (usually the front direction) of the unit 11 from the line at the substantially central portion of the electronic equipment rack 1 as shown in FIG. 1c. Further, the surface to which the pawl lever 254 is attached (for example, the front surface, the side surface, the upper surface, etc.) is not particularly limited.
In this way, the operator pulls out the unit 11 and can easily set the number of drawers for the unit 11 while checking the balance of the electronic equipment rack 1.
The string-like body length adjusting means is not limited to the wire length adjusting means 25 having the above configuration.

One end of the wire 21 as a string-like body is fixed to the outer peripheral surface of the tension applying wheel 241, and is alternately wound around the housing pulley 23 and the reel 24 in order toward the upper side. The end is fixed to the outer peripheral surface of the winding wheel 251.
In the present embodiment, a pair of rings 26 are provided on the left and right sides of the rear surface of the housing pulley mounting plate 105 (see FIG. 1a). That is, the wire 21 wound around the uppermost unit pulley 22 is wound around the ring 26 on the left side in the back direction, and is turned in the right direction. Further, it is wound around the right ring 26, is turned in the front direction, and is wound around the winding wheel 251.

The wire 21 has a length L. At this time, one end portion of the wire 21 is wound around the tension applying wheel 241 by the length L1, and the other end portion is the uppermost outer periphery of the winding wheel 251. It is fixed to the surface (fixed in a state where the amount of wrapping is 0), and tension is applied so as not to loosen in the middle.
Here, in order to pull out one unit 11 from a stored state to a predetermined position in the front direction, if a wire 21 having a length ΔL is necessary, in order to pull out any two or more units 11 simultaneously, The length L1 of the wire 21 wound by the tension applying wheel 241 needs to satisfy L1 ≧ 2 × ΔL.
In the present embodiment, L1 = 7 × ΔL, assuming that all the units 11 are pulled out simultaneously.

Next, operations and effects of the electronic device rack 1 having the above-described configuration will be described with reference to the drawings.
FIG. 2A is a cross-sectional view taken along the line B-B for explaining the operation of the electronic device rack according to the embodiment of the present invention when the limit number of drawers is 1.
FIG. 2B is a cross-sectional view taken along the line B-B for explaining the operation of the electronic device rack according to the embodiment of the present invention when the limit on the number of drawers is two.
In FIG. 2 a, first, in the electronic equipment rack 1, the dial 252 is rotated counterclockwise, and the wire 21 is wound around the winding wheel 251 by a length of 6 × ΔL. Therefore, the wire 21 having a length of 1 × ΔL is wound around the tension applying wheel 241 of the reel 24.
In addition, the wire 21 wound up by the winding wheel 251 is not sent out by the ratchet mechanism.

  Next, when an operator (not shown) pulls out one arbitrary unit 11 (the unit 11 in the third stage from the top in FIG. 2A) in the front direction, the tension applying wheel 241 rotates in the clockwise direction. The wire 21 having a length of 1 × ΔL is sent out, and the rotation of the tension applying wheel 241 is stopped. That is, one unit 11 is pulled out by the wire 21 having a length of 1 × ΔL sent from the tension applying wheel 241.

Subsequently, as shown in FIG. 2a, the operator may try to pull out a new unit 11 in the front direction with the third-stage unit 11 pulled out from above. Even in such a case, the pull-out control device 2 prevents the new unit 11 from being pulled out because the tension applying wheel 241 cannot send out the wire 21.
For example, at the time of maintenance, an operator may become obsessed with maintenance and try to pull out a new unit 11 without checking the balance of the electronic equipment rack 1. Even in such a case, the drawer control device 2 limits the number of units 11 to be pulled out, so that the unit 11 is not pulled out beyond the limit number. That is, the drawer control device 2 avoids the risk of the electronic device rack 1 falling due to a change in the center of gravity of the electronic device rack 1, and ensures work safety.

Further, the electronic equipment rack 1 may be, for example, any two units 11 (in FIG. 2b, from the top to the third and sixth stages depending on the weight, the position of the center of gravity, etc. Even if the unit 11) is pulled out in the front direction, there is no risk of the electronic equipment rack 1 falling down, and the safety of the work may be ensured.
In this case, the operator changes the setting from the state where the limit number of drawers shown in FIG. 2a is 1 to the state where the limit number of drawers shown in FIG.

  As shown in FIG. 2b, this change is made by first rotating the dial 252 in the clockwise direction with the pawl lever 254 pulled in the front direction (with the ratchet mechanism released), so that the winding wheel 251 The wound wire 21 is sent out by a length of 1 × ΔL, and the pawl lever 254 is returned. The fed wire 21 having a length of 1 × ΔL is wound around the tension applying wheel 241. As described above, since this switching (setting change) can be easily performed in a short time, operability and usability can be improved.

  Subsequently, in a state where one unit 11 (the third-stage unit 11 from the top in FIG. 2B) is pulled out, the operator further adds a unit 11 (in the second-stage unit 11 from the top in FIG. 2B). ) Is pulled in the front direction, the tension applying wheel 241 rotates in the clockwise direction, the wire 21 having a length of 1 × ΔL is sent out, and the rotation of the tension applying wheel 241 stops. That is, the second unit 11 is pulled out by the wire 21 having a length of 1 × ΔL sent from the tension applying wheel 241.

Next, in a state where the two units 11 are pulled out, the operator may try to pull out the unit 11 further in the front direction. Even in such a case, the pull-out control device 2 prevents the new unit 11 from being pulled out because the tension applying wheel 241 cannot send out the wire 21.
Thus, the electronic device rack 1 can be controlled so that a predetermined number of units 11 are pulled out according to the length of the wire 21.
In the electronic equipment rack 1 shown in FIG. 2B, when the two drawn out units 11 are stored in the housing 10, the wire 21 having a length of 2 × ΔL is wound around the tension applying wheel 241. Therefore, any two units 11 can be pulled out.

As described above, the electronic device rack 1 can freely change the number of drawers of the unit 11 between 0 and 7 by operating the wire length adjusting means 25, thereby improving usability and added value. Can be improved. In addition, since the drawer limit number can be switched easily and in a short time, it is practical and can reliably prevent problems such as the electronic device rack 1 falling over.
Moreover, the rack 1 for electronic devices of this embodiment has various application examples.
Next, each application example will be described with reference to the drawings.

<First application example>
FIG. 3: has shown BB sectional drawing for demonstrating the rack for electronic devices concerning the 1st application example of one Embodiment of this invention.
In the electronic device rack 1a according to the first application example, the housing pulley 23 is slidable in a long hole 1051 formed in the housing pulley mounting plate 105a as compared with the electronic device rack 1 of the above embodiment. It is different in that it is fixed. Other components are substantially the same as those of the electronic equipment rack 1.
Therefore, in FIG. 3, the same components as those in FIG. 1c are denoted by the same reference numerals, and detailed description thereof is omitted.

  The casing pulley mounting plate 105a has seven elongated holes 1051 whose longitudinal direction is the vertical direction. The elongated hole 1051 corresponds to the mounting position of the housing pulley 23 of the first embodiment, and exerts substantially the same effect as the first embodiment with respect to the seven-stage unit 11 in the first embodiment. can do.

The electronic equipment rack 1a has a seven-stage unit 11 at the beginning of installation as shown in FIG. 1c. However, the thickness of the electronic equipment rack 1a is changed from the lower four units 11 due to specification changes or model changes. Is configured to have two units 11a that are approximately double.
Such a change may frequently occur depending on the electronic device used. In such a case, in the electronic equipment rack 1a, the lower four housing pulleys 23 are once loosened and slid over the elongated holes 1051, and the housing pulley 23 is fixed at that position. Thereby, the housing pulley 23 can be moved and fixed to a position corresponding to the unit pulley 22 of the unit 11a.

  As described above, according to the electronic equipment rack 1a according to the first application example, even when a part of the unit 11 is changed to a unit 11a having a different size or the like, it is easily and freely optimized. Can be achieved. In addition, since the number of drawers can be easily changed with the change of the unit 11a, the usability and added value of the electronic equipment rack 1a can be improved. Further, even when the length ΔL is changed due to the change of the unit 11a, the length of the wire 21 can be freely adjusted by the wire length adjusting means 25, and this can be easily dealt with. it can.

<Second application example>
FIG. 4: has shown BB sectional drawing for demonstrating the rack for electronic devices concerning the 2nd application example of one Embodiment of this invention.
The electronic device rack 1b according to the second application example has a plurality of housing pulleys 23 formed on the housing pulley mounting plate 105b (this application example) as compared with the electronic device rack 1a of the first application example. Then, the point which is detachably fixed to a total of 14 fixing holes 1052 is different. Other components are substantially the same as those of the electronic equipment rack 1a.
Therefore, in FIG. 4, the same components as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

The electronic equipment rack 1b has a seven-stage unit 11 at the beginning of installation as shown in FIG. 1c. However, the thickness of the electronic equipment rack 1b is changed from the lower four units 11 due to specification changes or model changes. Is configured to have two units 11a that are approximately double.
Such a change may frequently occur depending on the electronic device used. In such a case, in the electronic equipment rack 1b, the lower four housing pulleys 23 are once removed, and the housing pulley 23 is fixed again in the fixing holes 1052 that are one step above. Thereby, the housing pulley 23 can be moved and fixed to a position corresponding to the unit pulley 22 of the unit 11a.

  Thus, according to the electronic equipment rack 1b according to the second application example, even when a part of the unit 11 is changed to a unit 11a having a different size, it is easily and freely optimized. Can be achieved. In addition, since the number of drawers can be easily changed with the change of the unit 11a, the usability and added value of the electronic equipment rack 1b can be improved.

<Third application example>
FIG. 5: has shown BB sectional drawing for demonstrating the rack for electronic devices concerning the 3rd application example of one Embodiment of this invention.
The electronic device rack 1c according to the third application example is formed with an L-shaped long hole 1053 instead of the long hole 1051 as compared with the electronic device rack 1a of the first application example. It has a different point. Other components are substantially the same as those of the electronic equipment rack 1a.
Therefore, in FIG. 5, the same components as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

The pulley mounting plate for housing 105c has an L-shape consisting of a first slot whose longitudinal direction is the vertical direction and a second slot whose longitudinal direction extends horizontally from the lower portion of the first slot. Holes 1053 are formed at seven locations.
In this application example, for example, in the third stage L-shaped long hole 1053 from the top, the housing pulley 23 is fixed to the distal end side (the back side of the electronic equipment rack 1c) of the second long hole. And interference of the two wires 21 is avoided.
In addition, two casing pulleys 23 are fixed in the seventh L-shaped long hole 1053 from the top. One housing pulley 23 is fixed to the first long hole, and the other housing pulley 23 is fixed to the tip side of the second long hole (the back side of the electronic equipment rack 1c). Has been.

  The first wire length adjusting means 25 is provided at the height of the first stage unit 11 from above, and this wire length adjusting means 25 controls the limit of the number of drawers of the unit 11 from the top to the third stage. To do. That is, the wire 21 in the wire length adjusting means 25 is alternately wound around the unit pulley 22 and the housing pulley 23 from the top to the third stage, and further, the L-shaped long hole 1053 at the seventh stage from the top. Is wound around a housing pulley 23 fixed to the second elongated hole and wound around a tension applying wheel 241 of the first reel 24.

  The second wire length adjusting means 25 is provided at the height of the fourth stage unit 11 from above, and this wire length adjusting means 25 is used to pull out the fourth to seventh stage units 11 from above. Control the limit number. That is, the wire 21 in the wire length adjusting means 25 is alternately wound around the fourth to sixth stage unit pulleys 22 and the housing pulley 23 from the top, and further, for the seventh stage unit from the top. It is wound around the pulley 22 and the housing pulley 23 fixed to the first long hole of the seventh L-shaped long hole 1053 from the top, and is wound around the tension applying wheel 241 of the second reel 24. ing. A pair of rings 26 corresponding to the second wire length adjusting means 25 are attached to the housing pulley attachment plate 105c.

  In this way, according to the electronic equipment rack 1c according to the third application example, for the unit 11 from the top to the third stage, for example, the limit on the number of drawers of the unit 11 is 1, and the fourth stage from the top With respect to the seventh-stage unit 11, the limit on the number of drawers of the unit 11 can be set to 3. That is, the electronic device rack 1c has a simple structure, but with respect to two units 11 groups (in this application example, a group of three upper units 11 and a group of four lower units 11). The number of drawers of the unit 11 can be set separately, and the usability and added value can be further improved.

<Fourth application example>
FIG. 6 a is a cross-sectional view taken along the line B-B for explaining the rack for electronic equipment according to the fourth application example of the embodiment of the present invention.
FIG. 6B shows a schematic enlarged perspective view of the tension applying means of the rack for electronic equipment according to the fourth application example of the embodiment of the present invention.
The electronic device rack 1d according to the fourth application example is different from the electronic device rack 1 according to the first embodiment in that weight-type tension applying means 24d is provided instead of the reel 24. Other components are substantially the same as those of the electronic equipment rack 1.
Therefore, in FIGS. 6a and 6b, the same components as those in FIG. 1c are denoted by the same reference numerals, and detailed description thereof is omitted.

  The tension applying unit 24d is a weight 242 having a substantially rectangular plate shape. The weight 242 is provided with two rings 243 serving as a weight winding portion on the top. Further, three rings 244 are provided on the lower surface of the right end portion of the upper plate 102 toward the lower side. Each ring 243 is positioned between the rings 244, and the wire 21 from the ring 26 to the take-up wheel 251 is inserted in the order of the ring 244, the ring 243, the ring 244, the ring 243, and the ring 244. Has been. As a result, the reciprocating wire 21 is wound around each ring 243 with respect to the ring 244.

  In this way, when the weight 242 is positioned in the vicinity of the bottom plate 101 and rises to the vicinity of the upper plate 102, the length L1 of the wire 21 that can apply tension (stroke of the tension applying means 24d) is This is about four times the height of the electronic equipment rack 1d. Further, when it is desired to further increase the length L1 of the wire 21, it is possible to easily cope with a space-saving state by increasing the ring 243 and the ring 244.

  One end of the wire 21 is directly connected to the seventh-stage unit 11 from the top. As a result, the number of unit pulleys 22 and housing pulleys 23 used can be reduced, and the lower space where the reels 24 are provided is freed, so that downsizing and effective use of the space can be achieved.

Thus, according to the electronic device rack 1d according to the fourth application example, the stroke of the tension applying means 24d can be made sufficiently long. Further, since the structure is simple, the manufacturing cost can be reduced, and the space of the reel 24 can be used effectively.
In addition, although embodiment mentioned above and each application example were demonstrated as the rack for electronic devices, it is effective also as embodiment and each application example of a drawer | drawing-out control apparatus.

The electronic device rack and the drawer control device of the present invention have been described with reference to the preferred embodiments. However, the electronic device rack and the drawer control device according to the present invention are not limited to the above-described embodiments. Needless to say, various modifications can be made within the scope of the present invention.
For example, the structure of the housing 10 of the electronic device rack 1 is not limited to the above structure, and can correspond to racks having various structures.

  The drawer control device of the present invention is not limited to use in an electronic equipment rack, and can be widely applied to various structures having a drawer portion.

FIG. 1a is a schematic top view for explaining an electronic equipment rack according to an embodiment of the present invention. FIG. 1b shows a cross-sectional view along the line AA in FIG. 1a. FIG. 1c shows a cross-sectional view along BB of FIG. 1a. FIG. 2A is a cross-sectional view taken along the line B-B for explaining the operation of the electronic device rack according to the embodiment of the present invention when the limit number of drawers is 1. FIG. 2B is a cross-sectional view taken along the line B-B for explaining the operation of the electronic device rack according to the embodiment of the present invention when the limit number of drawers is two. FIG. 3: has shown BB sectional drawing for demonstrating the rack for electronic devices concerning the 1st application example of one Embodiment of this invention. FIG. 4: has shown BB sectional drawing for demonstrating the rack for electronic devices concerning the 2nd application example of one Embodiment of this invention. FIG. 5: has shown BB sectional drawing for demonstrating the rack for electronic devices concerning the 3rd application example of one Embodiment of this invention. FIG. 6 a is a cross-sectional view taken along the line B-B for explaining the rack for electronic equipment according to the fourth application example of the embodiment of the present invention. FIG. 6 b shows a schematic enlarged perspective view of the tension applying means of the rack for electronic equipment according to the fourth application example of the embodiment of the present invention.

Explanation of symbols

1, 1a, 1b, 1c, 1d Electronic equipment rack 2 Drawer control device 10 Housing 11, 11a Unit 21 Wire 22 Unit pulley 23 Housing pulley 24 Reel 24d Tension applying means 25 Wire length adjusting means 26 Ring 101 Bottom plate 102 Upper plate 103 Column 104 Casters 105, 105a, 105b, 105c Housing pulley mounting plate 106 Winding wheel mounting plate 241 Tensioning wheel 242 Weight 243 Ring 244 Ring 251 Winding wheel 252 Dial 253 Pulling wheel 254 Pawl lever 1051 Long Hole 1052 Fixed hole 1053 L-shaped elongated hole

Claims (9)

A winding part for the drawer part provided in two or more drawer parts;
A plurality of substrate winding portions provided on the substrate;
A string-like body wound around the drawing portion winding portion and the base winding portion;
A string-like body length adjusting means for adjusting the length of the string-like body;
A drawer control device that controls to pull out a predetermined number of the drawers according to the length of the string-like body.   2. The drawer control device according to claim 1, wherein the base winding portion is provided slidably or detachably with respect to the base.   3. The drawer control according to claim 1, wherein the string-like body length adjusting means includes a winding wheel that winds up the string-like body, and a ratchet that restricts rotation of the winding wheel. apparatus.   The drawer control device according to any one of claims 1 to 3, further comprising tension applying means for applying tension to the string-like body.   6. The drawer control device according to claim 5, wherein the tension applying means includes a spring and a tension applying wheel that is rotated by the spring and winds the string-like body.   The said tension | tensile_strength provision means has a weight and one or more weight winding parts which are provided in this weight and the said string-like body is wound more than one reciprocation were described in Claim 5 characterized by the above-mentioned. Drawer control device. In a rack for electronic equipment in which units as drawers are arranged in multiple stages,
An electronic equipment rack comprising the drawer control device according to any one of claims 1 to 6.   The electronic device rack according to claim 7, wherein an operation portion of the string-like body length adjusting means is provided on a drawing direction side of the electronic device rack.   The rack for electronic equipment according to claim 7 or 8, comprising two or more drawer control devices.

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