JP2024027224A - Store fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a store fixture capable of solving problems in which a height of a store fixture body in a use posture is unintendedly changed sometimes, and facilitating operation for changing the posture of a leg body.

SOLUTION: A store fixture which is a desk D can be changed in a posture, between a use posture and a reversed posture (R) flipped vertically from the use posture. The store fixture comprises: a top plate which is a store fixture body; leg bodies 2 whose postures can be changed for supporting the top plate and changing a height position of the top plate; a posture change restriction mechanism 4X which positions postures of the leg bodies 2 in normal time, and allows change of the postures of the leg bodies only when an operation part receives a positioning release operation; and an incorrect operation prevention mechanism 46 having a lock member 461 for inhibiting the posture change of the leg bodies 2 regardless of a state of the posture change restriction mechanism 4X. The lock member 461 is actuated using an operation for changing the posture of the store fixture from the reversed posture (R) to the use posture, and actuation of the lock member is released using an operation for changing the posture of the store fixture from the use posture to the reversed posture (R).

SELECTED DRAWING: Figure 10

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to fixtures such as desks and chairs that are suitably used in schools and the like.

Conventionally, various configurations have been considered for fixtures such as desks and chairs used in schools etc., which include a fixture body and legs that support the fixture body and whose posture can be changed to change the height position of the fixture body. (For example, see Patent Document 1).

Here, it is desired that the operation for changing the posture of the legs be simple. However, there is a problem in that when the user touches the operation part for changing the posture of the legs in the usage position, the posture of the legs, that is, the height position of the fixture body may be changed unintentionally. .

Japanese Patent Application Publication No. 2002-242912

The present invention has been made with the above in mind, and it solves the problem of the height position of the fixture body being unintentionally changed in the usage posture, while also providing an operation for changing the posture of the legs. The aim is to make it simple.

The fixture according to the invention according to claim 1 is a fixture that can take a usage position and an inverted position in which the usage position is reversed upside down, and includes a fixture body, and a fixture body that supports the fixture body. legs whose posture can be changed in order to change the height position of the legs; and the posture of the legs is always positioned and allows the posture of the legs to be changed only when an operation unit receives a positioning release operation. a posture change restriction mechanism; and an erroneous operation prevention mechanism including a locking member for prohibiting a change in the posture of the leg body regardless of the state of the posture change restriction mechanism, the locking member being configured to lock the locking member from the inverted posture. The device is activated by using the movement of changing to the usage position, and is deactivated by using the movement of changing to the opposite position.

The fixture according to the second aspect of the invention is the fixture according to the first aspect, wherein the locking member is activated and deactivated by its own weight.

The fixture according to the invention according to claim 3 is the fixture according to claim 1, wherein the locking member protrudes from the leg body in the inverted position to be in the deactivated state, and is retracted into the leg body in the use position to be in the activated state. It is.

In the fixture according to the invention according to claim 4, the pedestal constituting the leg body includes an outer cylinder, an inner cylinder fitted into the outer cylinder so as to be relatively movable, and an inner cylinder disposed within the inner cylinder and the outer cylinder. and the inner cylinder, the positioning member having a protrusion for performing positioning in a moderate manner by engaging with an insertion hole provided in one of the inner cylinders and a fixing hole provided in the other, and forming the posture change restriction mechanism. The locking member has a locking position that prohibits the protruding and retracting movement of the positioning member in the use position, and an unlocking member that permits the protruding and retracting movement of the positioning member in the inverted position. The device according to claim 1 is in a locked position.

The fixture according to the invention according to claim 5 further includes a fixing member that restricts or releases the movement of the positioning member to maintain or release the positioning state, and by pressing an operating section provided on the fixing member. 5. The device according to claim 4, wherein the engagement state between the insertion hole and the fixing hole and the projection can be temporarily released.

According to the present invention, it is possible to solve the problem that the height position of the fixture main body is unintentionally changed in the usage posture, and to simplify the operation for changing the posture of the legs. become.

FIG. 1 is a front view showing a desk that is a fixture according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. An enlarged view of the vicinity of section B in FIG. 1. An enlarged view of the vicinity of section C in FIG. 2. FIG. 4 is a sectional view taken along line XX in FIG. 3. 5 is a sectional view taken along the YY line in FIG. 4. FIG. FIG. 3 is an exploded perspective view showing a pedestal and a fixing member according to the same embodiment. FIG. 6 is an explanatory diagram of the operation of the pillar and the fixing member according to the same embodiment. FIG. 6 is an explanatory diagram of the operation of the pillar and the fixing member according to the same embodiment. An explanatory diagram of the operation of the pillar according to the same embodiment. An explanatory diagram of the operation of the pillar according to the same embodiment. An explanatory diagram of the operation of the pillar according to the same embodiment. An explanatory diagram of the operation of the pillar according to the same embodiment. An explanatory diagram of the operation of the pillar according to the same embodiment. FIG. 6 is an explanatory diagram of the operation of the pillar according to the embodiment. FIG. 7 is a plan sectional view showing the main parts of the legs of a fixture according to another embodiment of the present invention. FIG. 3 is a front cross-sectional view showing a main part of the leg of the fixture according to the same embodiment. FIG. 3 is an exploded perspective view showing the pillar and fixing member of the fixture according to the same embodiment. FIG. 7 is a plan sectional view showing the main parts of the legs of a fixture according to another embodiment of the present invention. FIG. 3 is a front cross-sectional view showing a main part of the leg of the fixture according to the same embodiment. FIG. 3 is an exploded perspective view showing the pillar and fixing member of the fixture according to the same embodiment. FIG. 3 is a front cross-sectional view showing a main part of the leg of the fixture according to the same embodiment.

One embodiment of the present invention will be described with reference to FIGS. 1 to 15.

As shown in FIGS. 1 to 4, the desk D, which is a fixture including the fixing member 44 according to the present embodiment, includes a top plate 1, which is a main body of the fixture, and legs 2, which support the top plate 1. It has a symmetrical shape.

As shown in FIGS. 1 to 4, the leg body 2 includes a leg base 3, a pair of left and right leg columns 4 that stand up from the leg base 3, and a pair of leg columns 4 that are provided above these columns 4 and that support the top plate 1 from below. It has a supporting top plate support 5.

The leg base 3 is made of members such as metal pipes, and as shown in FIGS. 1 to 4, it includes a rear frame 31 extending left and right, and sides extending forward from both ends of the rear frame 31. It is integrally equipped with a frame 32.

As shown in FIGS. 1, 3, and 4, the pedestal 4 stands up from the middle part of the side frame 32 of the leg base 3, and its upper end is connected to the top plate holder 5. Further, as shown in FIGS. 4 to 7, this pedestal 4 includes an outer cylinder 41, an inner cylinder 42 that is fitted into the outer cylinder 41 so as to be relatively movable, and an outer cylinder disposed within the inner cylinder 42. 41 and the inner cylinder 42 in a moderate manner, a fixing member 44 of the present invention that restricts or releases the movement of the positioning member 43 to maintain or release the positioning state, and the outer cylinder 41. A spacer 47 is provided between the inner cylinder 42 and the inner cylinder 42.

More specifically, as shown in FIG. 1, the outer cylinder 41 has a lower end fixed to the side frame 32 of the leg base 3, and is formed using a metal pipe member having an oval shape in cross section. There is. As shown in FIGS. 4 to 7, this outer cylinder 41 has a front wall 411, an inner wall 412, an outer wall 413, and a back wall 414, and the front wall 411 and the back wall 414 are half It has a cylindrical shape. Further, the inner wall 412 of the outer cylinder 41 is provided with two elongated rectangular fixing holes 41a extending in the depth direction and spaced apart in the vertical direction, and the fixing member 44 is inserted into the middle of these fixing holes 41a. A circular fixing member insertion hole 41b is provided for this purpose. As described above, the inner cylinder 42 is fitted into the outer cylinder 41 so as to be relatively movable.

The inner cylinder 42 is formed using a metal pipe member having an oval shape in cross section, and as shown in FIGS. 5 to 7, it includes a front wall 421, an inner wall 422, an outer wall 423, The front wall 421 and the back wall 424 have a semi-cylindrical shape. Further, as shown in FIGS. 6 and 7, the inner wall 422 of the inner cylinder 42 has a plurality of through holes 42a to 42i arranged at regular intervals in the longitudinal direction, in this embodiment, first to ninth insertion holes 42a to 42i in order from the bottom. In addition, a slit 42s extending in the longitudinal direction while communicating the insertion holes 42a to 42i is provided, and the fixing member 44 is inserted through the slit 42s. Here, the second to eighth insertion holes 42b to 42h are for inserting the fixing member 44 and rectangular positioning parts 42b1 to 42h1 that can be engaged with a protrusion 436, which will be described later, of the positioning member 43. The circular fixing portions 42b2 to 42h2 are provided in communication with each other. As shown in FIGS. 4 to 11, a positioning member 43 is disposed inside the inner cylinder 42, and one of the insertion holes 42b to 42h is positioned to match the fixing hole 41a of the outer cylinder 41. In this state, the positioning member 43 appropriately determines the relative position with respect to the outer cylinder 41. That is, in this embodiment, from the state where the first and third insertion holes 42a, 42c and the fixing hole 41a of the outer cylinder 41 match, the seventh and ninth insertion holes 42g, 42i and the fixing hole 41a of the outer cylinder 41 The height position of the top plate 1 can be adjusted to seven levels until the two match.

As shown in FIGS. 5 to 11, the positioning member 43 has a protrusion 436 that is biased by a compression coil spring 433, which is an elastic member, and engages with the insertion holes 42a to 42i and the fixing hole 41a. . More specifically, as shown in FIGS. 4 to 11, the positioning member 43 includes a latch plate 431 that is U-shaped in plan view and has a protrusion 436, and a latch plate 431 that is open toward the latch plate 431 in plan view. It includes a U-shaped back plate 432 and a compression coil spring 433 disposed between the latch plate 431 and the back plate 432. The latch plate 431 includes a face plate portion 434 that can be attached to the inner wall 422 of the inner cylinder 42, and side plate portions 435 that extend laterally from both front and rear ends of the face plate portion 434. In addition, rectangular protrusions 436 that protrude in the direction toward the outer cylinder 41 and the inner cylinder 42 are formed at both upper and lower ends of the face plate part 434 by, for example, sheet metal processing. The fixing hole 41a and the positioning portions 42a1 to 42i1 of the insertion holes 42a to 42i of the inner cylinder 42 are engaged with each other. A retainer 439 for holding the free end of the compression coil spring 43 is provided on a surface of the face plate portion 434 opposite to the surface on which the protruding portion 436 is provided. The side plate portion 435 is provided only at the central portion in the height direction. The back plate 432 includes a face plate portion 437 attached to the outer wall 423 of the inner cylinder 42, and side plate portions 438 extending laterally from both front and rear ends of the face plate portion 437. A retainer 430 for holding the fixed end of the compression coil spring 43 is provided on the surface of the face plate portion 437 facing the latch plate 431. Guide plates 438a extend apart from each other from both front and rear ends of the side plate portion 438, and are engaged with the side plate portion 435 of the latch plate 431 in a horizontally movable manner at the central portion of the guide plate 438a in the height direction. A guide recess 43a is provided for guiding the direction of relative movement with the latch plate 431. Further, this positioning member 43 has a temporary release function that can forcefully release the engaged state temporarily. Specifically, the latch plate 431 receives the operation force acting in the direction from the fixing member 44 toward the back plate 432 and moves toward the back plate 432 against the biasing force of the compression coil spring 43. The protrusion 436 is removed from the insertion holes 42a to 42i and the fixing hole 41a, allowing relative movement between the outer cylinder 41 and the inner cylinder 42. The fixing member 44 is formed using a female thread 442 formed between both protrusions 436 of the latch plate 431 of the positioning member 43.

As shown in FIGS. 4 to 11, the fixing member 44 of this embodiment utilizes the tightening force between the female thread 442 and the head of the male thread member 441 to secure the members, that is, the outer cylinder 41 and the inner cylinder. 42, and includes a female screw 442 provided on the latch plate 431, and a male screw member 441 that is screwed into the female screw 442 and passes through the fixing member insertion hole 41b of the outer cylinder 41. . A female thread 442 of this fixing member 44 is provided at the center of a truncated conical projection 440. The shape of the protrusion provided with the female thread 442 of the fixing member 44 may be arbitrarily set as long as it can engage with the fixing member insertion hole 41b of the outer cylinder 41. Further, the head of the male screw member 441 is a knob 443 that receives an operating force for screwing the male screw member 441 onto the female screw 442 or releasing the screwed state. Further, this fixing member 44, more specifically, the knob 443 of this fixing member 44 is operated by a pressing operation to forcibly temporarily release the engagement state between the protrusion 436 and the insertion holes 42a to 42i and the fixing hole 41a. Accept power.

Here, in this embodiment, the positioning member 43 and the fixing member 44 cooperate to always position the posture of the leg body 2, and the knob 443 of the fixing member 44 serving as the operating section receives the positioning release operation. It functions as a posture change restriction mechanism 4X that allows the posture of the leg 2 to be changed only in certain cases.

Furthermore, the present embodiment further includes an erroneous operation prevention mechanism 46 including a locking member 461 for prohibiting a change in the posture of the leg body 2 regardless of the state of the posture change restriction mechanism 4X, that is, the positioning member 43 and the fixing member 44. There is. This erroneous operation prevention mechanism 46 is activated by changing the lock member 461 from the inverted position (R) to the use position (N), and is deactivated by using the movement to change the lock member 461 from the reverse position (R) to the used position (N). .

Specifically, the lock member 461 includes a rotation shaft 462 that is supported by a bearing 43x provided on the back plate 432 of the positioning member 43, and a plate-shaped lock member main body 463 that extends in one direction from the rotation shaft 462. It is equipped with The lock member main body 463 includes side plates 464 extending from both side edges in the thickness direction of the lock member main body 463. This locking member 461 assumes a locking position (L) in which the locking member main body 463 extends from the rotation shaft 461 toward the latch plate 431 and becomes substantially horizontal when the desk D is in the use posture (N). The rotating end of 463 reaches near the latch plate 431. At this time, the side plate 464 faces the back plate 432 and restricts the rotation of the lock member main body 463. Even if the knob 443 of the fixing member 44 receives a pressing force in this state, the latch plate 431 and the locking member 461 will interfere and movement of the latch plate 431 toward the back plate 432 will be prohibited. 436 and the insertion holes 42a to 42i and the fixing hole 41a are never released. On the other hand, when the desk D is in the inverted position (R), the locking member main body 463 takes an unlocked position (U) in which it hangs down substantially vertically from the rotation shaft 461. In this state, when the knob 443 of the fixing member 44 receives a pressing force, the latch plate 431 and the lock member 461 do not interfere, and the latch plate 431 is allowed to move in the direction toward the back plate 432. , the engagement between the protrusion 436 and the insertion holes 42a to 42i and the fixing hole 41a is released. Then, when the desk D is moved between the use position (N) and the inverted position (R), the lock member main body 463 of the lock member 461 rotates around the rotation axis 462 due to its own weight to the locked position. (L) and the unlocked position (U).

In addition, in this embodiment, as shown in FIGS. 5 to 15, a part or all of the male screw member 441 is not completely tightened to the female screw 442 and is visible from the outside. A tool 45 is provided. In this embodiment, the forget-to-tighten prevention tool 45 is provided near the fixing member insertion hole 41b of the outer cylinder 41, that is, near the female screw 442. More specifically, the fixing member insertion hole 41b is provided at the center of a boss 415 protruding from the inner wall 412, and this boss 415 has a function as a forget-tightening prevention tool 45. In addition, the knob 443 of the fixing member 44 has a gap 44s into which the forget-to-close prevention device 45 enters when the male screw member 441 is screwed onto the female screw 442. The outer peripheral surface 415a of the boss 415 is colored in a different color from the knob 443 of the fixing member 44. In FIGS. 7 to 9, a pattern is attached to the outer circumferential surface 415a of the boss 415 to make it easier to understand that the outer peripheral surface 415a is colored.

A top plate holder 5 is connected to the upper end of this pedestal 4.

The top plate support 5 is attached to the lower surface of the top plate 1 and supports the top plate 1 from below. More specifically, this top plate holder 5 is made of a metal pipe member, and includes a rear top plate holder 51 that supports the vicinity of the unused end of the top plate 1 from below and extends from side to side; It integrally has side top plate receiving parts 52 extending forward from both left and right ends of the plate receiving part 51 and supporting both side ends of the top plate 1 from below. The intermediate portion of the side top plate receiving portion 52 is connected to the upper end of the pedestal 4.

Next, the operation of each part when extending and contracting the pillars 4 in order to change the height position of the top plate 1 of this desk D will be described.

In the state shown in FIG. 6, the first and third insertion holes 42a, 42c match the fixing hole 41a of the outer cylinder 41, and the protrusion 436 engages with these insertion holes 42a, 42c and the fixing hole 41a. At the same time, since the male screw member 441 of the fixing member 44 is fastened to the female screw 442, relative movement between the outer cylinder 41 and the inner cylinder 42 is prohibited. When the desk D is placed in the inverted position (R), as shown in FIG. 10, the locking member 461 moves from the locking position (L) to the unlocking position (U) due to its own weight, and the operation of the erroneous operation prevention mechanism 46 is released. Ru. From this state, the knob 443 of the fixing member 44 is rotated to release the fastened state and separate the knob 443 from the outer cylinder 41, as shown in FIG. Next, as shown in FIG. 12, the knob 443 is pressed toward the outer cylinder 41 against the biasing force of the compression coil spring 433. At this time, the latch plate 431 provided with the protrusion 436 of the positioning member 43 is pushed toward the back plate 432, and the protrusion 436 is removed from the insertion holes 42a, 42c and the fixing hole 41a. At this time, the latch plate 431 does not interfere with the lock member 461. Then, by moving the inner cylinder 42 relative to the outer cylinder 41, the top plate 1 is raised and lowered to a desired height position. FIG. 13 shows a state in which the top plate 1 is being moved. Then, when the top plate 1 reaches the next height position, as shown in FIG. The protruding portion 436 passes through and engages the insertion holes 42b, 42d and the fixing hole 41a due to the biasing force 433, and the outer cylinder 41 and the inner cylinder 42 are positioned with respect to each other. By repeating this, the height position of the top plate 1 can be set to a desired height position. Then, when the height position of the top plate 1 reaches a desired height position, the male screw 441 of the fixing member 44 is tightened to the female screw 442 so that the knob 443 is in close contact with the outer cylinder 41, and the inner cylinder 42 and the outer cylinder 41 are again prohibited from moving relative to each other. Thereafter, the desk D is returned to the use position (N), and the lock member 461 is set to the lock position (L) as shown in FIG. 6, and the erroneous operation prevention mechanism 46 is activated again.

On the other hand, while the desk D is in the usage position (N), rotate the knob 443 of the fixing member 44 to separate it from the outer cylinder 41 as shown in FIG. 15, and press the knob 443 toward the outer cylinder 41. Also, since the movement of the latch plate 431 in the direction toward the back plate 432 is restricted by the lock member 461, the protruding portion 436 cannot be removed from the insertion holes 42a, 42c and the fixing hole 41a, and therefore the pedestal 4 cannot be expanded or contracted. It is not possible.

In this embodiment, when tightening the male screw member 441 of the fixing member 44 to the female screw 442, the male screw member 441 is partially screwed into the female screw 442 from the state shown in FIG. The state shown in FIG. 9 is made, and the male screw member 441 is further tightened to make the state shown in FIG. Here, when the male screw member 441 is not completely fastened to the female screw 442, a part or all of the outer circumferential surface of the forget-to-tighten prevention tool 45, that is, the outer circumferential surface 415a of the boss 415 is visible from the outside. Due to this and the fact that the outer peripheral surface 415a of the boss 415 is colored in a different color from the knob 443, when the male screw member 441 is not completely tightened to the female screw 442, this can be easily notified to the user. It is now possible to recognize it.

In addition, when changing the relative position between the outer cylinder 41 and the inner cylinder 42, the male screw member 441 is loosened so that the state shown in FIG. 10 is changed to the state shown in FIG. 11, and the above-mentioned operation is performed. After that, the male screw member 441 is tightened again to obtain the state shown in FIG. 3. In this case as well, when the male screw member 441 is not completely fastened to the female screw 442, part or all of the outer circumferential surface 415a of the boss 415 is visible from the outside, so the user can easily see this. It is now possible to recognize the

Here, FIG. 1 is a front view showing a desk D according to this embodiment. FIG. 2 is a sectional view taken along line AA in FIG. FIG. 3 is an enlarged view showing the vicinity of section B in FIG. 1, that is, the vicinity of the fixing member 44. FIG. 4 is an enlarged view showing the vicinity of portion C in FIG. 2, that is, the vicinity of the fixing member 44. FIG. 5 is a sectional view taken along line XX in FIG. 3. FIG. 6 is a sectional view taken along the YY line in FIG. 4. FIG. 7 is an exploded perspective view of the pillar 4 of the desk D. FIG. 8 is a diagram showing a state in which the male screw member 441 (and knob 443) of the fixing member 44 is completely removed, and FIG. It is a diagram showing a state in which it is screwed onto a female screw 442. 10 to 15 are explanatory diagrams showing the operations of the positioning member 43, the fixing member 44, and the erroneous operation prevention mechanism 46 according to this embodiment. In particular, FIG. 10 shows a state in which desk D has been rotated 180 degrees around the horizontal axis from the state shown in FIG. 13 shows a state in which the inner cylinder 42 is moved relative to the outer cylinder 41 from the state shown in FIG. 12, and FIG. 14 shows a state in which the inner cylinder 42 is moved from the state shown in FIG. FIG. 4 is a diagram showing a state in which the protrusion 436 is further moved relative to the outer cylinder 41 and the protrusion 436 is engaged with the insertion holes 42b, 42d and the fixing hole 41a. FIG. 15 shows a state in which the knob 443 of the fixing member 44 is loosened while the desk D is in the operating position (N). Furthermore, in FIGS. 6 and 10 to 15, patterns are attached to portions of the slits 42s of the inner cylinder 42 that do not overlap with the insertion holes 42a to 42i.

As described above, according to the configuration of the present embodiment, the posture change restriction mechanism 4X, that is, the locking member 461 for prohibiting the posture change of the leg body 2 regardless of the states of the positioning member 43 and the fixing member 44 is provided. The lock member 461 is actuated by changing the lock member 461 from the inverted position (R) to the operating position (N), and is deactivated by changing the lock member 461 from the reverse position (R) to the use position (N). ing. Therefore, without any special operation by the user, when the desk D is in the usage position (N), changing the posture of the legs 2 is prohibited to prevent unintentional changes in the height position of the top plate 1, while the desk By setting D to the inverted posture (R), the posture of the leg body 2 can be changed by loosening and pressing the knob 443 of the fixing member 44 without any further operation by the user. That is, it is possible to allow the height position of the top plate 1 to be changed.

Furthermore, since the locking member 461 is activated and deactivated by its own weight, the structure can be simplified and the number of parts can be reduced compared to a structure that uses a biasing means such as a spring. .

Further, the locking member 461 takes a locking position (L) that prohibits the protruding and retracting movement of the positioning member 43 in the use position (N), and an unlocking position that allows the protruding and retracting movement of the positioning member 43 in the inverted position (R). (U), it is possible to reduce the size of parts and simplify the structure compared to a system that directly restricts the relative movement between the outer cylinder 41 and the inner cylinder 42 of the pedestal 4. can.

Note that the present invention is not limited to the embodiments described above.

For example, in the embodiments described above, the present invention is applied to a desk, but the present invention may be applied to chairs and other furniture in general other than desks.

Furthermore, in the embodiment described above, one locking member is arranged for each pedestal to constitute an erroneous operation prevention mechanism, but as will be described below with reference to FIGS. It is also conceivable that the erroneous operation prevention mechanism is constructed by arranging two members each. In the following description, the same reference numerals are given to parts corresponding to the embodiments described above, and the description thereof will be omitted.

What is shown in FIGS. 16 to 18 is a pedestal A4 that can be used in place of the pedestal 4 of the desk D according to the embodiment described above, and differs from that of the embodiment described above in the following points. .

This pedestal A4, like the above-mentioned pedestal, includes an outer cylinder 41, an inner cylinder 42 that is fitted into the outer cylinder 41 so as to be relatively movable, and an outer cylinder 41 and the inner cylinder arranged inside the inner cylinder 42. It is equipped with a positioning member 43 that performs positioning with the cylinder 42 in a moderate manner, and a fixing member 44 that restricts or releases the movement of the positioning member 43 to maintain or release the positioning state. The cylinder 42 is formed using a metal pipe member having a substantially rectangular cross-sectional shape.

Further, a guide convex portion 43a for guiding the direction of relative movement with the back plate 432 is provided at the center in the height direction of the side plate portion 435 of the latch plate 431 of the positioning member 43. A guide recess 43b is provided at the center in the height direction of the side plate 438 to engage with the guide protrusion 43a of the latch plate 431 so as to be movable in the left-right direction and to guide the direction of relative movement with the latch plate 431. It is being

In addition, the pillar A4 of this embodiment further includes an erroneous operation prevention mechanism 46 including two locking members 461 as shown below. This locking member 461 has a rotating shaft 462 that is pivotally supported by a bearing 43x provided on the back plate 432 of the positioning member 43, and a tip that is latched within the pillar A4 when the desk D assumes the use posture (N). It includes a plate-shaped locking member main body 463 that assumes a locking position (L) that reaches the plate 431, and a connecting portion 465 that connects these rotation shafts 462 and the locking member main body 463. Furthermore, in this embodiment, bearings 43x are provided at two locations on the back plate 432 of the positioning member 43, spaced apart in the height direction.

When the desk D is reversed from the usage position (N) to the inverted position (R), the locking member 461 in this embodiment also rotates around the rotation axis 462 due to its own weight (not shown), and rotates to the unlocked position (U ), and when desk D is reversed from the inverted position (R) to the use position (N), it rotates around the rotation axis 462 due to its own weight and moves to the lock position (L).

Here, FIGS. 16 and 17 are cross-sectional views showing essential parts of the leg body A4 in this embodiment, and FIG. 16 corresponds to FIG. 5 and FIG. 17 corresponds to FIG. 6, respectively. FIG. 18 is an exploded perspective view of this pillar A4.

In this aspect as well, the locking member 461 is actuated using the action of changing from the inverted position (R) to the use position (N), and is deactivated using the action of changing the locking member 461 to the opposite position. Effects similar to those of the embodiment described above can be obtained.

Further, an embodiment may be adopted in which two locking members are arranged for each pillar as described above in the pillars B4 as shown in FIGS. 19 to 21 to constitute an erroneous operation prevention mechanism. In the following description, the same reference numerals are given to parts corresponding to the embodiments described above, and the description thereof will be omitted.

The pedestal B4 shown in FIGS. 19 to 21 differs from that of the embodiment described above in the following points.

This pedestal B4 also has an outer cylinder 41, an inner cylinder 42 that is fitted into the outer cylinder 41 so as to be relatively movable, and an outer cylinder 41 and an inner cylinder arranged inside the inner cylinder 42, similarly to the above-mentioned pedestal. It is equipped with a positioning member 43 that performs positioning with the cylinder 42 in a moderate manner, and a fixing member 44 that restricts or releases the movement of the positioning member 43 to maintain or release the positioning state. The cylinder 42 is formed using a metal pipe member having a substantially rectangular cross-sectional shape.

Further, the side plate portion 435 of the latch plate 431 of the positioning member 43 is provided only at the central portion of the positioning member 43 in the height direction, and engages with this side plate portion 435 to control the direction of relative movement with the back plate 432. A guide recess 43b is provided in the center of the side plate 438 in the height direction of the back plate 432 for guiding. More specifically, a pair of guide plates 438a protruding in the front-rear direction is provided at both upper and lower ends of the side plate portion 438, and a guide recess 43b is formed between these guide plates 438a. In addition, a recess 438a is provided at the center of the front and rear side plates 438 in the height direction so that the front and rear side plates 438 come together.

In addition, the pedestal B4 of this embodiment further includes an erroneous operation prevention mechanism 46 including two locking members 461 as shown below. This locking member 461 has the same configuration as that provided inside the pillar 4 described above. That is, this locking member 461 includes a rotating shaft 462 that is pivotally supported by a bearing 43x provided on the back plate 432 of the positioning member 43, and a plate-shaped locking member main body 463 that extends in one direction from this rotating shaft 462. ing. The lock member main body 463 includes side plates 464 extending from both side edges in the thickness direction of the lock member main body 463. Furthermore, in this embodiment, bearings 43x are provided at two locations on the back plate 432 of the positioning member 43, spaced apart in the height direction.

When the desk D is reversed from the usage position (N) to the inverted position (R), the locking member 461 in this embodiment also rotates around the rotation axis 462 due to its own weight (not shown), and rotates to the unlocked position (U ), and when desk D is reversed from the inverted position (R) to the use position (N), it rotates around the rotation axis 462 due to its own weight and moves to the lock position (L).

Here, FIGS. 19 and 20 are cross-sectional views showing essential parts of the leg body B4 in this embodiment, and FIG. 19 corresponds to FIG. 5 and FIG. 20 corresponds to FIG. 6, respectively. FIG. 21 is an exploded perspective view of this pillar B4.

In this aspect as well, the locking member 461 is actuated using the action of changing from the inverted position (R) to the use position (N), and is deactivated using the action of changing the locking member 461 to the opposite position. Effects similar to those of the embodiment described above can be obtained.

Note that an arbitrary number of locking members that are activated and deactivated by their own weight may be provided for each leg (for each malfunction prevention mechanism). That is, the leg body may be provided with only one such locking member, or may be provided with two or three or more locking members. Furthermore, it is not necessary to provide the same number of locking members for each leg.

Furthermore, in the above-described embodiment, the locking member is actuated and deactivated by its own weight, but for example, the locking member protrudes from the leg body in an inverted posture and becomes a deactivated state, and also inside the leg body in the use posture. It may be configured such that the device is immersed in the device and enters the operating state. As an example of a specific configuration of such a device, as shown in FIG. 22, a lock member includes a grounding detection element C463, a regulating element C462, and a connecting element C464 that connects these grounding detecting element C463 and regulating element C462. An example is an erroneous operation prevention mechanism C46 that uses C461. The ground contact detection element C463 is a plate-shaped member that protrudes from the leg 4 in the inverted posture (R) and sinks into the leg 4 in the use posture (N). The regulating element C462 is connected to the grounding detecting element C463 via the connecting element C464, and is interposed between the latch plate 431 and the back plate 432 of the positioning member 43 in the use position (N) to change the posture of the leg body 4. The operation of the operating section 44 is restricted. Here, the ground contact detection element C463 is urged in the direction of protruding from the leg body 4 by the urging means C465. The biasing means C465 has a fixed end connected to a retainer C419 provided in the outer cylinder 41 of the leg body 4, and a free end connected to the grounding detection element C463, and projects the grounding detection element C463 from the leg body 4. It is a coil spring that biases in the direction of In the usage position (N), the regulating element C462 is pushed into the retainer C419 side against the biasing means by the biasing means C465 and comes into close contact with the installation floor surface F. In addition, (a) of FIG. 22 is a front sectional view of the main part of the leg body 4 in an inverted position (R), and (b) of the same figure is a use position (N).

In the embodiment described above, the posture of the legs can be changed moderately, but the present invention may of course be applied to a fixture that can change the posture of the legs steplessly. Even if the posture of the leg is changed moderately, any configuration of the positioning member for positioning each member constituting the leg may be adopted.

In addition, various changes may be made without departing from the spirit of the present invention.

D...Furnishings (desk)
1... Fixture body (top plate)
2... Leg body 4... Pillar 41... Outer cylinder 42... Inner cylinder 43... Positioning member 44... Fixing member 4X... Posture change restriction mechanism 46... Erroneous operation prevention mechanism 461... Locking member (N)... Usage position (R)... Reversal Posture (L)…Lock position (U)…Unlock position

Claims (5)

A fixture that can take a usage position and an inverted orientation where the usage position is turned upside down,
The fixture body,
legs that support the fixture body and whose posture can be changed to change the height position of the fixture body;
a posture change restriction mechanism that always positions the posture of the leg and allows the posture of the leg to be changed only when an operation unit receives a positioning release operation;
and an erroneous operation prevention mechanism including a locking member for prohibiting a change in the posture of the leg regardless of the state of the posture change restriction mechanism,
The fixture is configured to operate the locking member by using an action of changing the locking member from the inverted position to the use position, and to release the locking member by using an action of changing the locking member from the inverted position to the use position. The fixture according to claim 1, wherein the locking member is activated and deactivated by its own weight. 2. The fixture according to claim 1, wherein the locking member protrudes from the leg body in the inverted position to be in the deactivated state, and is retracted into the leg body in the use position to be in the activated state. A pedestal constituting the leg body includes an outer cylinder, an inner cylinder fitted into the outer cylinder so as to be relatively movable, and a pedestal arranged within the inner cylinder and provided on one of the outer cylinder and the inner cylinder. and a positioning member constituting the posture change restriction mechanism, the positioning member having a protrusion for performing positioning in a moderate manner by engaging with an insertion hole provided on the other side and a fixing hole provided on the other side,
2. The fixture according to claim 1, wherein the locking member assumes a locked position in which the positioning member is prohibited from protruding and retracting in the use position, and takes an unlocked position in which the positioning member is permitted to protrude and retract in the inverted position. It further includes a fixing member that restricts or releases the movement of the positioning member to maintain or release the positioning state, and by pressing an operating section provided on the fixing member, the insertion hole and the fixing hole are connected to the protrusion. 5. The fixture according to claim 4, wherein the engaged state between the fixtures can be temporarily released.

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