JP7322488B2 - Desk with tilting top plate - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desk with a top board tilting function that can be used with the top board locked at a desired angular position.

Conventionally, this type of desk has a tilting function that uses a ratchet mechanism to lock the top plate at an arbitrary tilt angle less than or equal to a predetermined angle, and unlocks the top plate when the top plate is made larger than the predetermined angle. known (see, for example, Patent Document 1).

That is, in such a desk, a tilt lock mechanism using a ratchet allows the top plate to be locked at an arbitrary tilt angle less than or equal to a predetermined angle. can be released, and the unlocked state can be maintained until the top plate is returned to its original initial angle.

However, with such a configuration, there is a problem that it is difficult to lock the top plate at an inclination angle close to the predetermined angle described above. Specifically, when the top plate is tilted from a horizontal or near initial angle, the top plate is intermittently locked by, for example, a ratchet mechanism. Locking is completed at a nearby position. However, in the conventional one, the user cannot recognize whether or not the top board has reached the predetermined angle described above. Therefore, it may happen that the top board is operated beyond a predetermined angle.

However, if the top board is erroneously operated to exceed the predetermined angle against one's will, the unlocked state is maintained, and it becomes necessary to return to the original initial angle and restart the operation from the beginning.

JP 2013-5874 A

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problem described above, that is, to solve the problem that an attempt to lock the top plate near the upper limit of the lockable top plate use area is likely to cause an erroneous operation.

In the desk with a top plate tilting function according to the first aspect of the invention, the top plate can be locked at an arbitrary tilt angle equal to or less than a predetermined angle, and the top plate can be locked by tilting the top plate beyond the predetermined angle. can be released, and the unlocked state can be maintained until the top plate is returned to its original initial angle, wherein the top plate is positioned at the predetermined angle and a stop mechanism is provided for temporarily stopping the top plate at a point where the top plate extends from the initial angle until the top plate reaches the predetermined angle and an unlocking region where the tilt is greater than the predetermined angle. The stop mechanism elastically biases the top plate in the direction of decreasing the tilt angle only in the lock release region, and elastically biases the top plate in other areas. It is equipped with an elastic body that does not

In the present invention, "to stop" is a concept that includes not only completely stopping the movement but also suppressing the movement by applying resistance.

According to a second aspect of the invention, there is provided a desk with a tilting function for a top plate, wherein the stop mechanism includes a pair of members that move relative to each other in accordance with the tilting motion of the top plate, and the pair of members. and a second contacting body provided on the other of said pair of members and forcibly stopped at a predetermined standby position on said other member by the biasing force of said elastic body. The first and second abutment bodies are separated in the top plate use area, and when the top plate reaches the predetermined angle, both the abutment bodies are in contact with each other , and in the lock release area, the The second contacting body is relatively pressed against the first contacting body to move away from the predetermined standby position while resisting the elastic biasing force of the elastic body.

According to the desk with the tilting function of the top plate according to the third aspect of the invention, the top plate can be locked at any tilt angle less than or equal to the predetermined angle, and the tilting of the top plate beyond the predetermined angle locks the top plate. can be released, and the unlocked state can be maintained until the top plate is returned to its original initial angle, wherein the top plate is positioned at the predetermined angle and a stop mechanism is provided for temporarily stopping the top plate at a point where the top plate extends from the initial angle until the top plate reaches the predetermined angle and an unlocking region where the tilt is greater than the predetermined angle. The stop mechanism consists of a pair of members whose relative separation distance increases as the tilt angle of the top plate increases, and both of these members. and an elastic body that elastically urges the top plate in the direction of decreasing the inclination angle only in the lock release region stretched between the top plate and the predetermined angle. tension is applied to the elastic body over the lock release region from the stage when the lock is reached.

According to the fourth aspect of the present invention, there is provided a desk with a tilting function for the top plate, in which the top plate can be locked at an arbitrary tilt angle less than or equal to a predetermined angle, and when the top plate is tilted beyond the predetermined angle, the locking is performed. can be released, and the unlocked state can be maintained until the top plate is returned to its original initial angle, wherein the top plate is positioned at the predetermined angle and a stop mechanism is provided for temporarily stopping the top plate at a point where the top plate extends from the initial angle until the top plate reaches the predetermined angle and an unlocking region where the tilt is greater than the predetermined angle. The table is supported by the desk body in such a manner that it can be tilted by a tilt lock mechanism. A pair of members that move relative to each other along with a tilting motion, a cam groove provided on one of the pair of members, and a cam follower provided on the other of the pair of members, wherein the cam groove is a tilt permitting portion that guides the cam follower in the top plate use area, a locking portion that locks the cam follower when the top plate reaches the predetermined angle, and a top plate that is positioned in the unlocking region. An unlocking portion for guiding the cam follower is provided, and the locking portion where the cam follower abuts and is locked in the cam groove exists only at one position corresponding to the predetermined angle.

According to the fifth aspect of the present invention, there is provided a desk with a tilting function for the top plate, in which the top plate can be locked at an arbitrary tilt angle equal to or less than a predetermined angle, and by tilting the top plate beyond the predetermined angle, the lock can be obtained. can be released, and the unlocked state can be maintained until the top plate is returned to its original initial angle, wherein the top plate is positioned at the predetermined angle and a stop mechanism is provided for temporarily stopping the top plate at a point where the top plate extends from the initial angle until the top plate reaches the predetermined angle and an unlocking region where the tilt is greater than the predetermined angle. The stop mechanism comprises a pair of members that move relative to each other as the top plate tilts, and a fixed member that is fixed to one of the pair of members. a locking body provided on the other of the pair of members and movable between a locking position where contact with the fixed body is possible and a retracted position where contact is not possible; and a push latch mechanism for selectively holding either the locking position or the retracted position , wherein the fixed body is locked by contacting the locking body at the predetermined angle, and by loosening the locked state. The engaging body is retracted to the retracted position by the push latch mechanism to allow tilting of the top plate to the unlocking area.

According to the present invention, it is possible to recognize whether or not the top plate has reached a predetermined angle related to unlocking, and to easily lock the top plate at a desired angular position without causing an erroneous operation. A desk with a tilt function can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS The whole perspective view which shows the desk which concerns on 1st embodiment of this invention. FIG. 2 is a side cross-sectional view showing a main part of the desk according to the same embodiment; FIG. 4 is an explanatory view of the operation of the desk according to the same embodiment; The exploded perspective view which shows the desk which concerns on the same embodiment. FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is a side cross-sectional view showing the essential parts of a desk according to a second embodiment of the present invention; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 11 is a side cross-sectional view showing the essential parts of a desk according to a third embodiment of the present invention; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 11 is a side cross-sectional view showing the essential parts of a desk according to a fourth embodiment of the present invention; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; FIG. 4 is an operation explanatory view of the stop mechanism of the desk according to the same embodiment; 1 is a side cross-sectional view showing a main part of a desk according to a reference example related to the present invention; FIG. FIG. 4 is an explanatory view of the operation of the stop mechanism of the desk according to the same reference example . FIG. 4 is an explanatory view of the operation of the stop mechanism of the desk according to the same reference example . FIG. 4 is an explanatory view of the operation of the stop mechanism of the desk according to the same reference example . FIG. 4 is an explanatory view of the operation of the stop mechanism of the desk according to the same reference example .

<First Embodiment>
A first embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG.

As shown in FIG. 1, the desk D of this embodiment has a pair of use areas A and B arranged facing each other.

One use area A is formed between the left leg 1L and the right leg 1R. As shown in FIGS. A top plate 5 and a sub-top plate 6 arranged next to the top plate 5 are provided between the legs 1L and 1R. The tabletop 5 is supported by the desk body DD in a state in which it can tilt across a tabletop use area R1 from the initial angle γ to a predetermined angle α, and a lock release area R2 where the inclination is greater than the predetermined angle α. It is As shown in FIGS. 3 and 4, the side end portion 6a of the sub-top plate 6 on the top plate 5 side is supported in a state of being lifted from the floor F by an intermediate vertical frame 4 carried by the left and right legs 1L and 1R. ing. The intermediate vertical frame 4 serves both to support the top plate 5 and the sub-top plate 6, and is supported by both legs 1L and 1R via horizontal beams 2 and 3, as shown in FIG. That is, the desk D has a top plate 5 tiltably supported by a desk body DD mainly composed of left and right legs 1L and 1R, front and rear horizontal beams 2 and 3, and an intermediate vertical frame 4. As shown in FIG. Details will be described below.

As shown in FIG. 4, each of the left and right legs 1L and 1R is of a gate shape having a pair of front and rear leg supports 11 and a vertical frame 12 installed between the upper ends of the leg supports 11. An adjuster 13 is provided at the lower end of each leg support 11 . As shown in FIG. 4, two horizontal beams 2 and 3 are installed between these legs 1L and 1R in parallel with a gap in the front-rear direction. , 3.

The front horizontal beam 2, as shown in FIG. 4, is in the shape of a rectangular pipe positioned between the front end and the rear end of the use area A and spanned between the legs 1L and 1R.

The rear horizontal beam 3 is, as shown in FIG. 8, in the shape of a rectangular pipe positioned near the innermost end of the use area A and extending between the legs 1L and 1R.

As shown in FIG. 4 , the intermediate vertical frame 4 includes a cantilever receiver 41 extending forward from the front horizontal beam 2 , and the front horizontal beam 2 and the rear cantilever beam 41 at left and right positions corresponding to the cantilever receiver 41 . and a support member 42 which rigidly connects with the lateral beam 3 of . The extending end of the cantilever receiver 41 is provided with a right tilt hinge 52, which will be described later.

The top plate 5 can be tilted from at least an initial angle γ to a predetermined angle α. As shown in FIGS. The right side end portion 5b is pivotally supported on the intermediate vertical frame 4 via the right tilt hinge 52 while being pivotally supported on one leg 1L. Specifically, the top plate 5 includes a tiltable top plate body 53 and a tray 54 provided on the back side of the top plate body 53, as shown in FIGS. .

The top plate main body 53 has a flat plate shape having a flat top plate surface 53a, and as shown in FIGS. , and the vicinity of the use end 5 c at the right end is connected to the intermediate vertical frame 4 via a right tilt hinge 52 so as to be tiltable. 2, 3 and 5 to 8, the left tilt hinge 51 is attached to a fixing portion 511 fixed to the vertical frame 12 of the left leg 1L and to the lower surface 53b of the table top body 53. A movable portion 512 is rotatably connected via a hinge shaft 513 . The right tilt hinge 52, as shown in FIG. 522 are rotatably connected via a hinge shaft 523 .

The sub-top plate 6 has a flat top plate surface 6s, and as shown in FIGS. The right side end 6b is supported by the right leg 1R.

A tilt lock mechanism 7 for locking the tilt angle of the top plate 5 in a plurality of stages is provided between the top plate 5 and the rear horizontal beams 3 .

As shown in FIGS. 2 to 4, the tilt lock mechanism 7 comprises a pair of arms 71 and 72 whose base ends 71a and 72a are pivoted relative to each other. The portion 71b is rotatably attached to the horizontal beam 3 via a support pedestal 73, and the tip portion 72b of the other arm 72 is pivoted via a mounting pedestal 74 to the lower surface 53b of the top plate 5. there is A ratchet mechanism (not shown) is built in between the base ends 71a and 72a of the arms 71 and 72, and when the top plate 5 is rotated from the horizontal initial angle γ toward the predetermined angle α, the angle shown in FIG. The top plate 5 can be locked so as not to tilt downward each time it reaches a plurality of intermediate lock angles β shown in FIG. Then, by rotating the top plate 5 slightly upward beyond the predetermined angle α shown in FIG. It is now possible to return to Since the ratchet mechanism that operates in this manner is a conventional one, detailed description thereof will be omitted.

Thus, in this embodiment, the region from the initial angle γ to the predetermined angle α is named the top board use region R1, and the region beyond the predetermined angle α is named the lock release region R2. 8 will be explained.

That is, the desk D of this embodiment has a stop mechanism 8 for temporarily stopping the top plate 5 at a position where the predetermined angle α is reached.

The stop mechanism 8 is provided on the left tilt hinge 51, for example, and has a spring 81 that is an elastic body that elastically urges the top plate 5 in the direction of decreasing the tilt angle only in the lock release region R2. That is, the stop mechanism 8 includes a fixed portion 511 and a movable portion 512 of the left tilt hinge 51, which are a pair of members that move relative to each other with the tilting motion of the top plate 5, and a first shock provided on the fixed portion 511. The combination (specifically, pin 82) and the second abutting body (specifically, lever 83). In the stop mechanism 8, the pin 82 and the lever 83 are separated from each other in the top plate use region R1. At R2, the lever 83 is relatively pressed against the pin 82 and moves downward from the predetermined standby position m while resisting the elastic biasing force of the spring 81 .

More specifically, the fixed portion 511 of the tilt hinge 51 is screwed to the left leg 1L, and has an upper half portion 511a in the form of a flat plate that stands vertically. A front end portion of a movable portion 512 is pivotally connected to the portion via a hinge shaft 513 . A pin 82 protrudes from the inner surface of the upper half portion 511a.

The movable portion 512 of the tilt hinge 51 has an upright plate 515 parallel to the upper half portion 511a of the fixed portion 511, and a top plate mounting plate 516 extending inward from the upper edge of the upright plate 515. A standing plate 515 is pivotally attached to the fixed portion 511 via a hinge shaft 513 . The upright plate 515 is formed with a long hole 515a through which the pin 82 of the fixed portion 511 is inserted. The elongated hole 515a has an arc-shaped elongated hole shape so that the top plate 5 can tilt across the above-described top plate use region R1 and lock release region R2. Also, the front end portion 83 a of the lever 83 described above is pivotally attached to the upright plate 515 via the pivot shaft 84 . The lever 83 is arranged so as to intersect the long hole 515a, and has an intermediate abutting portion 83b at a portion corresponding to the long hole 515a with which the pin 82 abuts, and a spring hook portion 83c at the rear end portion. have. A spring 81 stretched between the spring hooking portion 83c and a spring hooking pin 811 fixed to the standing plate 515 urges the lever 83 to rotate upward. A locking shaft 85 for locking the upward movement of the lever 83 at a predetermined standby position m is projected from the standing plate 515. The locking shaft 85 and the spring 81 move the lever 83 to the predetermined standby position. It is forcibly stopped by m. The spring 81 described above is, for example, a tension coil spring, and is preloaded so as to exert an elastic biasing force on the lever 83 even when the lever 83 is forcibly stopped at the predetermined standby position m. there is On the other hand, the top plate mounting plate 516 is provided with a screw hole 516 a and is screwed to the lower surface of the top plate 5 .

The other use area B is also formed between the left leg 1L and the right leg 1R, and has a structure that is symmetrical to the one use area A in plan view.

In addition, P is a blindfold panel P arranged on the boundary between the first use area A and the second use area B. As shown in FIG. H is a wiring duct that is arranged under the panel P and can be used from either of the use areas A and B. FIG.

Next, the operation of this desk D will be explained.

With the desk D having such a configuration, the top plate 5 can be tilted by putting a finger on the finger hook portion 54a or the like on the far end side of the top plate 5 and pulling it up. When the tilt angle of the top plate 5 is increased, the tilt lock mechanism 7 prevents the top plate 5 from descending every time the intermediate lock angle β is reached. When released, the top plate 5 can be stopped at an appropriate intermediate locking angle β. When the top plate 5 is further pulled up to a position exceeding the predetermined angle α, the locked state by the tilt lock mechanism 7 is released, and the top plate 5 can be quickly returned to the initial angle γ which is the lowest point.

In this desk D, the stopping mechanism 8 is operated to temporarily stop the top plate 5 when it reaches a predetermined angle α after moving upward from the initial angle γ. That is, when the top plate 5 reaches the predetermined angle α, the pin 82 of the stop mechanism 8 comes into contact with the intermediate abutting portion 83b of the lever 83 forcedly waiting at the predetermined waiting position m. A large resistance force acts at once on the tilting operation. Therefore, the operator can recognize that the tabletop 5 has reached the predetermined angle α, and if the tilting operation is stopped at that stage, the tabletop 5 is locked at the highest intermediate lock angle β. can do. When the top plate 5 is lifted from this state to the unlocking region R2 by exceeding the predetermined angle α while resisting the biasing force of the spring 81, the locked state of the ratchet mechanism of the tilt lock mechanism 7 is temporarily released and the top plate 5 is lifted. can be returned to the initial angle γ all at once as usual. Specifically, when the top plate 5 is moved upward beyond a predetermined angle α, the lever 83 waiting at the predetermined standby position m is pressed relatively downward by the pin 82, and the top plate 5 is allowed to tilt up to the unlocking region R2. 5 shows the state where the top plate 5 is positioned at the initial angle γ, FIG. 6 shows the state where the top plate 5 has reached the predetermined angle α, and FIGS. It shows the state of entering R2. 5 to 8, only the left tilt hinge 51 provided in association with the stop mechanism 8 is extracted and shown. In this state, a gap S is formed between the lever 83 and the locking shaft 85. As shown in FIG. In this embodiment, the area between the maximum tilt angle δ, which is the tilting top dead center of the top plate 5, and the predetermined angle α is referred to as a lock release region R2, and the tilt lock mechanism can be operated in any one of the lock release regions R2. 7 ratchet mechanism is set to be unlocked.

With such a configuration, when the top plate 5 is tilted from the initial angle γ toward the predetermined angle α, the top plate 5 is tilted by the action of the stop mechanism 8 when the predetermined angle α is reached. The operator recognizes that the upper limit of the use area R1 has been reached. Therefore, it becomes easy to lock at the intermediate lock angle β which is set at the highest point in the tabletop use area R1.

Further, since the stop mechanism 8 is provided with the spring 81 that elastically biases the top plate 5 in the direction of decreasing the inclination angle only in the unlocking region R2, the magnitude of the impact when the predetermined angle α is reached is determined by the spring. The tension setting at 81 makes it easy to optimize. In particular, in this embodiment, the degree of impact is optimized by setting the preload of the spring 81, so that the operator can clearly recognize that the top plate 5 has reached the predetermined angle α.

In addition, the followings are mentioned as a modification of this embodiment. For example, in the present embodiment, the stop mechanism 8 is provided in association with only the left tilt hinge 51 side, but the stop mechanism 8 may be provided only on the right tilt hinge 52 side. A stopping mechanism 8 may be provided on both sides.

As another modification of the above-described first embodiment, there is also a configuration in which the first abutment member (pin) is provided on the movable portion of the tilt hinge and the second abutment member (lever) is provided on the fixed portion of the tilt hinge. mentioned.

<Second embodiment>
A second embodiment of the present invention will be described below with reference to FIGS. 9 to 11. FIG. In addition, the same code|symbol is attached|subjected to the part which is the same as that of 1st embodiment, or respond|corresponds, and description is abbreviate|omitted.

In the first embodiment described above, the stop mechanism 8 is provided in association with the tilt hinge 51 arranged on the front side, but the desk D2 of this second embodiment, as shown in FIG. A stop mechanism W8 is provided in association with the tilt lock mechanism 7. As shown in FIG.

As shown in FIGS. 9 to 11, the stop mechanism W8 is composed of a pair of members (specifically, the tilt lock mechanism 7) whose relative distance increases as the tilt angle of the top plate 5 increases. 10, and an elastic body (specifically, a spring W81) stretched between the arms 71 and 72. As shown in FIG. No tension acts on the spring W81 in the use region R1, and tension acts on the spring W81 over the lock release region R2 from the stage when the predetermined angle α is reached as shown in FIG.

The spring W81 is, for example, a tension coil spring. As shown in FIGS. 9 to 11, one end of the spring W81 is connected to the tip 71b of one arm 71 via a wire W82, and the other end is connected to the other end via a wire W83. is connected to the tip portion 72b of the arm 72 of the . 9 and 10, the wires W82 and W83 are loose when the top plate 5 is positioned in the top plate use region R1, and the tension is set so as not to act on the spring W81. As shown in FIG. 11, when the top plate 5 is positioned at the predetermined angle α and in the lock release region R2, the wires W82 and W83 are in a tense state and an elastic biasing force is generated by the spring W81. 9 to 11 show the tilt lock mechanism 7 provided in association with the stop mechanism W8, and the horizontal beam 3 and the top plate 5 after the tilt lock mechanism 7 is attached.

Even with such a configuration, when the top plate 5 is tilted from the initial angle γ toward the predetermined angle α, the top plate 5 is tilted by the action of the stop mechanism W8 when the predetermined angle α is reached. The operator recognizes that the upper limit of the board use area R1 has been reached. Therefore, it becomes easy to lock at the intermediate lock angle β which is set at the highest point in the tabletop use area R1.

In addition, since the stopping mechanism W8 is provided with a spring W81 that elastically biases the top plate 5 in the direction of decreasing the inclination angle only in the unlocking region R2, the magnitude of the impact when the predetermined angle α is reached is determined by the spring W81. Selection of W81 enables optimization.

In addition, such a stop mechanism W8 can be easily implemented with a small number of parts, and can be retrofitted relatively easily to existing desks that do not have a stop mechanism. .

<Third Embodiment>
A third embodiment of the present invention will be described below with reference to FIGS. 12 to 18. FIG. In addition, the same code|symbol is attached|subjected to the part which is the same as that of 1st embodiment, or respond|corresponds, and description is abbreviate|omitted.

The stopping mechanism X8 of the third embodiment is provided on the left and right tilt hinges 51 and 52 arranged on the front side. Here, the stop mechanisms X8 respectively provided in association with the left and right tilt hinges 51 and 52 are arranged symmetrically and have the same configuration. Hereinafter, as a representative, the stop mechanism X8 provided in relation to the left tilt hinge 51 will be specifically described.

As shown in FIG. 12, the stop mechanism X8 is composed of a pair of members (specifically, a fixed portion 511 and a movable portion 512 of the tilt hinge 51) that move relative to each other as the top plate 5 tilts, and a movable portion 512. and a cam follower X82 provided in the fixed portion 511. The cam groove X81 guides the cam follower X82 in the top plate use region R1, and the tilt allowance portion X81a and the top plate 5 has a locking portion X81b that temporarily locks the cam follower X82 when the top plate 5 reaches a predetermined angle α, and an unlocking portion X81c that the top plate 5 guides the cam follower X82 in the unlocking region R2. .

As shown in FIGS. 12 to 18, the tilt-allowing portion X81a of the cam groove X81 is an elongated hole having an arcuate shape centered on the axis of the hinge shaft 513, and the shaft-like cam follower X82 is the tilting portion. As the top plate 5 tilts, it moves up and down within the allowance portion X81a. The locking portion X81b described above is formed at the lower end of the tilt allowing portion X81a. The unlocking portion X81c is continuous with the lower end portion of the tilt allowing portion X81a and arranged in parallel on the front side of the tilt allowing portion X81a, and the cam follower X82 engaged with the engaging portion X81b relatively moves forward. As a result, it moves to the upper end of the unlocking portion X81c. The tilt hinge 51 is provided with a structure for relatively forwardly moving the cam follower X82 locked to the locking portion X81b. That is, when the hinge shaft 513 fixed to the movable portion 512 moves back and forth in the long hole 511x provided in the fixed portion 511, the cam follower X82 and the cam groove X81 move back and forth relative to each other. there is

The operation of desk D3 in this embodiment is described below. When the top plate 5 is tilted from the initial angle γ toward the predetermined angle α, when the predetermined angle α is reached, the cam follower X82 is engaged with the locking portion X81b of the cam groove X81 by the action of the stopping mechanism X8. The operator recognizes that the top plate 5 has reached the upper limit of the top plate use area R1 by the abutment and locking. When the top plate 5 is further tilted upward from the predetermined angle α, the cam follower X82 is guided by the edge of the engaging portion X81b of the cam groove X81, and the entire top plate 5 slides slightly rearward. As a result, the cam follower X82 is guided to the unlocking portion X81c of the cam groove X81, allowing the top plate 5 to tilt toward the unlocking region R2, and the tilt lock mechanism 7 is unlocked. 13 is an inside view of the tilt hinge 51 with the top plate 5 positioned at the initial angle γ, and FIG. 14 is an inside view of the tilt hinge 51 in the same state. 15 is a view of the tilt hinge 51 viewed from the inside when the top plate 5 is positioned at the predetermined angle α, and FIG. 16 is a view of the tilt hinge 51 viewed from the inside in the same state. 17 is a view of the tilt hinge 51 as seen from the inside when the top plate 5 has entered the lock release region R2 and reached the maximum inclination angle δ, and FIG. 18 is a view of the tilt hinge 51 in the same state as seen from the inside. .

With such a configuration, the cam follower X82 abuts against the locking portion X81b of the cam groove X81 and is locked, thereby notifying the operator that the top plate 5 has reached the upper limit of the top plate use region R1. Since it is recognized, it is possible to more reliably prevent the predetermined angle α from being erroneously exceeded even if the tilt operation is performed vigorously. easier to do.

As a modified example of this embodiment, there is a configuration in which a cam groove is provided in the fixed portion and a cam follower is provided in the movable portion.

<Fourth embodiment>
A fourth embodiment of the present invention will be described below with reference to FIGS. 19 to 23. FIG. In addition, the same code|symbol is attached|subjected to the part which is the same as that of 1st embodiment, or respond|corresponds, and description is abbreviate|omitted.

The stop mechanism Y8 of the fourth embodiment is provided in association with the tilt hinge 51 arranged on the near side, as in the first embodiment.

As shown in FIGS. 19 to 23, the stop mechanism Y8 includes a pair of members (specifically, a fixed portion 511 and a movable portion 512 of the tilt hinge 51) that move relative to each other with the tilting motion of the top plate 5, and a tilt hinge. A fixed body (upper fixed pin Y81) fixed to the fixed portion 511 of the tilt hinge 51 and the upper fixed pin Y81 provided on the movable portion 512 of the tilt hinge 51 are contacted from the locking position k where the upper fixed pin Y81 can contact. It has a locking body Y82 that can move up to a retracted position t where it is impossible, and a push latch mechanism Y83 that selectively holds the locking body Y82 at either the locking position k or the retracted position t. , the upper fixed pin Y81 abuts and is locked by the locking body Y82 at a predetermined angle α, and by loosening the locked state, the locking body Y82 is retracted to the retracted position t by the push latch mechanism Y83. It is configured to allow tilting of the top plate 5 toward the unlocking region R2.

The upper fixed pin Y81 projects from the fixed portion 511 of the tilt hinge 51 and penetrates a long hole 512a provided in the movable portion 512. As shown in FIG. The long hole 512a is curved in an arc around the hinge shaft 513 of the tilt hinge 51. As shown in FIG.

The locking body Y82 includes an intermediate pivot Y821 pivotally attached to the movable portion 512 of the tilt hinge 51 via a spindle Y820, a first rotating arm Y822 extending forward from the intermediate pivot Y821, and an intermediate pivot Y821. A second rotating arm Y823 extending upward from a mounting portion Y821 and a third rotating arm Y824 extending rearward from an intermediate pivot portion Y821 are integrally provided. A pushing projection Y825 that abuts on a pushing rod Y831 of a push latch mechanism Y83, which will be described later, projects upward from the distal end portion Y822 of the first rotating arm. A locking claw Y826 is provided at the tip of the second rotating arm Y823 to contact the upper fixed pin Y81 at the locking position k. A weight Y827 is provided at the tip of the third rotating arm Y824 to urge the engagement body Y82 to rotate clockwise in the figure. At the locking position k described above, the locking claw Y826 intersects the long hole 512a and the locking body Y82 is in a state where it can lock the fixed pin Y81 above. The claw Y826 is disengaged from the elongated hole 512a to allow passage of the fixed pin Y81 above.

The push latch mechanism Y83 is a normal one as disclosed in Japanese Patent Laid-Open No. 2008-255567, for example, and includes a body Y832 attached to the attachment portion 512t of the movable portion 512 of the tilt hinge 51 and a body Y832 held by the body Y832. and a pushing rod Y831 capable of projecting and retracting from the retracted position p to the projecting position q. The body Y832 accommodates an urging spring (not shown) that elastically urges the pushing rod Y831 in the projecting position q direction, a heart cam mechanism (not shown) that controls the projecting/retracting state of the pushing rod Y831, and the like. When the pushing rod Y831 is pushed into the body Y832, the heart cam mechanism works to lock the pushing rod Y831 at the retracted position p even if the pushing force is released. When it is pushed again, the lock is released and the pushing rod Y831 protrudes to the projecting position q by the elastic force of the urging spring. Since the structure inside the body Y832 is a normal one, detailed description thereof is omitted. The tip of the pressing projection Y825 of the locking body Y82 is in contact with the tip of the pushing rod Y831 of the push latch mechanism Y83. When the top plate 5 returns to the initial angle γ, the fixed portion 511 of the tilt hinge 51 relatively pushes up the first rotating arm Y822 of the locking body Y82 to push the pushing rod Y831 of the push latch mechanism Y83. A lower fixing pin Y84 is protruding for the purpose.

The operation of desk D4 in this embodiment is described below. 19 and 20 show the state in which the top plate 5 is returned to the initial angle γ. In this state, the locking member Y82 is held at the locking position k and the locking claw Y826 stops at the position blocking the long hole 512a. Also, the pushing rod Y831 of the push latch mechanism Y83 is pushed into the retracted position p by being pushed by the pushing projection Y825 of the engaging body Y82 and locked. When the top plate 5 is tilted from this state, the upper fixed pin Y81 moves relatively along the elongated hole 512a, and when the top plate 5 reaches the predetermined angle α, the tilt angle is as shown in FIG. In addition, the upper fixed pin Y81 is locked by the locking claw Y826 of the locking body Y82, and the tilting operation of the top plate 5 is temporarily stopped. Due to the collision force at the time of this locking, the locking body Y82 relatively rotates clockwise in the drawing, and pushes the push rod Y831 of the push latch mechanism Y83 by a very small distance, releasing the locked state of the push rod mechanism Y83. be. That is, when the external force disappears, the pushing rod Y83 will be able to protrude outward. Therefore, immediately after the top plate 5 is stopped at the predetermined angle α, if the upward movement of the top plate 5 is stopped and the operating force is relaxed, the pushing rod Y831 of the push latch mechanism Y83 protrudes from the state indicated by the imaginary line in FIG. The engaging body Y82 is rotated in the counterclockwise direction in the figure, and as indicated by the solid line in FIG. As a result, the locking claw Y826 moves to a position separated from the long hole 512a, and the upper fixing pin Y81 can move to the lower end side of the long hole 512a. In other words, as shown in FIG. 23, the top plate 5 can be rotated beyond the predetermined angle α within the unlocking region R2 until reaching the maximum inclination angle δ. Then, when the top plate 5 is returned to the initial angle γ with the tilt lock mechanism unlocked, the lower surface of the first rotating arm Y822 of the locking body Y82, which is in the retracted position immediately before the return, faces downward. The fixed pin Y84 is relatively pushed up, and at the stage of returning to the initial angle γ, the engaging body Y82 returns to the engaging position k and the pushing rod Y831 of the push latch mechanism Y83 is pushed into the recessed position p. 19 and 20 to be locked. 19 to 22, only the left tilt hinge 51 provided in association with the stop mechanism Y8 and the top plate 5 to which the tilt hinge 51 is attached are shown. Also, the fixing portion 511 of the tilt hinge 51 is indicated by an imaginary line.

Even with such a configuration, when the top plate 5 is tilted from the initial angle γ toward the predetermined angle α, the top plate 5 is tilted by the action of the stop mechanism Y8 when the predetermined angle α is reached. The operator recognizes that the upper limit of the board use area R1 has been reached. Therefore, it becomes easy to lock at the intermediate lock angle β which is set at the highest point in the tabletop use area R1.

As a modification of the above-described fourth embodiment, there is a configuration in which the fixed body is provided on the movable portion of the tilt hinge and the locking body is provided on the fixed portion of the tilt hinge.

< Reference example >
Reference examples related to the present invention will be described below with reference to FIGS. 24 to 28. FIG. In addition, the same code|symbol is attached|subjected to the part which is the same as that of 1st embodiment, or respond|corresponds, and description is abbreviate|omitted.

As shown in FIG. 24, the desk D5 of this reference example is provided with a stop mechanism Z8 in relation to the mechanical side, that is, the tilt lock mechanism 7. As shown in FIG.

As shown in FIGS. 24 to 28, the stop mechanism Z8 includes a pair of members (specifically, arms 71 and 72 of the tilt lock mechanism 7) that move relative to each other as the top plate 5 tilts, and one of the members. An arm 71 is provided with a movable piece Z81 which is capable of changing its attitude, and an engaging member Z82 which is provided on the other arm 71 so as to engage with the movable piece Z81. A piece guide portion Z82a that guides the movable piece Z81 in the region R1, a locking portion Z82b that locks the movable piece Z81 when the predetermined angle α is reached, and a posture of the movable piece Z81 that changes in the unlock region R2. and a posture correcting portion that guides the movable top Z81 in the top receiving portion Z82c to the top guiding portion Z82a while changing the posture when returning the top plate 5 from the unlocking region R2 to the top plate use region R1. Z82d.

The movable top Z81 has a strip-like shape whose central portion is rotatably supported by one arm 71 via a support shaft Z811, and has, for example, a V-shaped concave portion Z81a at each end.

The engaging body Z82 is fixed to the base end portion 72a of the other arm 72, and has a wide curved portion Z821 that is fixed to the arm 72 and curves around the center 70 of the tilt lock mechanism. An inner narrow curved portion Z822 that is continuously provided and curves around the center of curvature of the tilt lock mechanism; It is in the form of a flat plate integrally provided with an outer narrow curved portion Z824 extending in the circumferential direction from the extending end of the extending portion Z823. The piece guiding portion Z82a is formed at the outer edge of the wide curved portion Z821, the engaging portion Z82b is formed at the tip of the outer narrow curved portion Z824, and the piece receiving portion Z82c is formed at the inner narrow curved portion. The posture correction section Z82d is formed by obliquely notching the outer edge of the wide curved section Z821 on the side of the inner narrow curved section Z822. It is formed.

The operation of the desk D5 of this reference example will be described below. 24 and 25 show the state in which the top plate 5 is returned to the initial angle γ. In this state, the movable top Z81 is in sliding contact with the top guide portion Z82a of the engaging body Z82. When the top plate 5 is tilted from this state, the movable top Z81 moves relative to the outer edge of the wide curved portion Z821, that is, the top guide portion Z82a while being in sliding contact with the top plate 5, thereby allowing the top plate 5 to tilt. When the top plate 5 reaches a predetermined angle α, as shown in FIG. 26, the recessed portion Z81a at one end of the movable top Z81 abuts against the tip of the outer narrow curved portion Z824, that is, the locking portion Z82b, and is locked. A plate 5 is stopped at a predetermined angle α. When the top plate 5 is returned slightly downward from this stopped state, as shown in FIG. 27, the recessed portion Z81a at the other end of the movable top Z81 comes into contact with the end portion of the wide curved portion Z821, and the posture is slightly corrected. That is, the recessed portion 81a at one end is slightly rotated to a posture in which the recessed portion 81a at one end does not hit the locking portion Z82b. After that, when the top plate 5 is tilted upward again, one side surface of the movable top Z81 abuts against the engaging portion Z82b and changes its posture greatly, and the movable top Z81 enters the top receiving portion Z82c. By this movement, as shown in FIG. 28, the top plate 5 can be rotated beyond the predetermined angle α to the lock release region R2, that is, until the maximum inclination angle δ is reached. After that, when the top plate 5 is returned to the direction of the initial angle γ, the movable top Z81 in the top receiving section Z82c is first rotated counterclockwise in the drawing by the guiding action of the posture correcting section Z82d, and the top guide section It returns to the original posture of sliding contact with Z82a, and moves toward the initial angle γ shown in FIGS.

Even with such a configuration, when the top plate 5 is tilted from the initial angle γ toward the predetermined angle α, the top plate 5 is tilted by the action of the stop mechanism Z8 when the predetermined angle α is reached. The operator recognizes that the upper limit of the plate use region R1 has been reached. Therefore, it becomes easy to lock at the intermediate lock angle β which is set at the highest point in the tabletop use area R1.

Also, with such a structure, the number of moving parts is reduced, so durability can be improved.

<Other embodiments>
In addition, this invention is not limited to each embodiment described above.

For example, in each of the above-described embodiments, the present invention is applied to a desk having a pair of use areas facing each other and two top plates in total, one for each use area. However, the top plate can be locked at any tilt angle less than or equal to the predetermined angle, and can be unlocked by tilting the top plate beyond the predetermined angle, and the unlocked state The present invention can be applied to all such desks as long as the desk has a top plate tilting function that can maintain the angle until the top plate is returned to the original initial angle. Examples include a desk with only one top board, a desk with multiple use areas aligned in the width direction and one top board in each use area, and a pair of use areas arranged facing each other. A plurality of pairs of desks or the like are arranged side by side in the width direction.

The top plate may have a tray behind the top plate main body like those of the first to third embodiments, or may have no tray like those of the fourth embodiment or reference example. good. That is, the tray may be omitted in the first to third embodiments, and conversely, the tray may be arranged behind the top plate main body in the fourth embodiment to the reference example . Even in other embodiments, it is optional whether or not a tray is provided behind the top plate main body.

In addition, various modifications may be made without departing from the gist of the present invention.

D, D2 to D5... Desk with top plate tilting function 5... Top plate 8, W8, X8, Y8, Z8... Stopping mechanism α... Predetermined angle γ... Initial angle

Claims (5)

The top plate can be locked at an arbitrary tilt angle less than or equal to a predetermined angle, and can be unlocked by tilting the top plate beyond the predetermined angle. A desk with a top plate tilt function that can be maintained until it is returned to the original initial angle,
A stop mechanism is provided for temporarily stopping the top plate at a position where the predetermined angle is reached without stopping until the top plate reaches the predetermined angle ,
The top plate is supported by the desk body so as to be able to tilt over a top plate use area from the initial angle to the predetermined angle and a lock release area where the tilt is greater than the predetermined angle. and
The desk with a top plate tilting function, wherein the stop mechanism includes an elastic body that elastically biases the top plate in the direction of decreasing the tilt angle only in the unlocking area and does not elastically bias the top plate in other areas. The stopping mechanism includes a pair of members that move relative to each other in accordance with the tilting motion of the top plate, a first abutting member provided on one of the pair of members, and the elastic member provided on the other of the pair of members. and a second colliding body forcibly stopped at a predetermined standby position on the other member by the biasing force of the body, and the first and second colliding bodies are separated from each other in the area where the top plate is used. When the top plate reaches the predetermined angle, the two contacting bodies abut against each other, and the second contacting body is relatively pressed against the first contacting body in the unlocking area. 2. The desk with a tilting top plate function according to claim 1 , wherein the desk is configured to move away from the predetermined waiting position while resisting the elastic biasing force of the elastic body. The top plate can be locked at an arbitrary tilt angle less than or equal to a predetermined angle, and can be unlocked by tilting the top plate beyond the predetermined angle. A desk with a top plate tilt function that can be maintained until it is returned to the original initial angle,
A stop mechanism is provided for temporarily stopping the top plate at a position where the top plate reaches the predetermined angle,
The top plate is supported by the desk body so as to be able to tilt over a top plate use area from the initial angle to the predetermined angle and a lock release area where the tilt is greater than the predetermined angle. and
The stopping mechanism comprises a pair of members whose relative separation distance increases as the inclination angle of the top plate increases, and the top plate only in the unlocking region stretched between these members. and an elastic body that is elastically biased in the direction of decreasing the inclination angle . In the top plate use area, no tension acts on the elastic body, and from the stage when the predetermined angle is reached to the lock release area. A desk with a tabletop tilting function configured so that tension acts on the elastic body. The top plate can be locked at an arbitrary tilt angle less than or equal to a predetermined angle, and can be unlocked by tilting the top plate beyond the predetermined angle. A desk with a top plate tilt function that can be maintained until it is returned to the original initial angle,
A stop mechanism is provided for temporarily stopping the top plate at a position where the top plate reaches the predetermined angle,
The top plate is supported by the desk body so as to be able to tilt over a top plate use area from the initial angle to the predetermined angle and a lock release area where the tilt is greater than the predetermined angle. , and the tilt lock mechanism can lock the top plate in the top plate use area so that it does not tilt downward,
The stop mechanism includes a pair of members that move relative to each other with the tilting motion of the top plate, a cam groove provided on one of the pair of members, and a cam follower provided on the other of the pair of members. the cam groove includes a tilt allowance portion for guiding the cam follower in the top plate use area; a locking portion for locking the cam follower when the top plate reaches the predetermined angle; The top plate includes an unlocking portion that guides the cam follower in the unlocking area ,
A desk with a top plate tilting function, wherein the locking portion where the cam follower abuts and is locked in the cam groove exists only at one position corresponding to the predetermined angle. The top plate can be locked at an arbitrary tilt angle less than or equal to a predetermined angle, and can be unlocked by tilting the top plate beyond the predetermined angle. A desk with a top plate tilt function that can be maintained until it is returned to the original initial angle,
A stop mechanism is provided for temporarily stopping the top plate at a position where the top plate reaches the predetermined angle,
The top plate is supported by the desk body so as to be able to tilt over a top plate use area from the initial angle to the predetermined angle and a lock release area where the tilt is greater than the predetermined angle. and
The stop mechanism includes a pair of members that move relative to each other in accordance with the tilting motion of the top plate, a fixed body that is fixed to one of the pair of members, and a fixed member that is provided to the other of the pair of members. a locking body that can move between a locking position where it can contact a body and a retracted position where it cannot contact; and a push latch that selectively holds the locking body at either the locking position or the retracted position. The fixed body abuts and is locked by the locking body at the predetermined angle, and when the locked state is loosened, the locking body is retracted by the push latch mechanism. A desk with a top plate tilting function configured to be retracted to a position and allow tilting of the top plate to the unlocking area.

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