JP4000271B2 - Folding table safe operation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, the top plate rotates between a use position where the top plate is substantially horizontal with respect to the leg column and a retracting position which is substantially vertical, and both the positions are maintained by the engagement means. The present invention relates to a safe operation device for a folding table that is released by one-way movement of an operation lever provided on the top plate.
[0002]
[Prior art]
As this type of folding table, the applicant of the present application has made it possible to conceal the top plate rotation locking portion from the outside, avoid the danger of fingers being pinched, and improve the safety. An operating device for the folded folding table has already been developed.
[0003]
FIG. 9 is a side view of the operating device of the folding table in which the top plate according to the present applicant is held in a horizontal position, and FIG. 10 is a side view of the folding table in which the top plate is also held in an upright (substantially vertical) position. It is a side view of an operating device.
[0004]
As shown in FIGS. 9 and 10, the folding table 01 includes a pair of left and right bases B having a pair of left and right brackets 03 facing the front and rear directions provided on both sides of the lower surface of the top plate 02 and a pivot axis 05 facing each left and right direction. By being pivotally attached to the upper end of the pedestal column 04 standing upright, the top plate 02 is folded in the horizontal use position (FIG. 9) where it lies down near the upper ends of both the pedestal columns 04 and the front column 04 stands up. It can rotate between positions (FIG. 10).
[0005]
Specifically, the top plate 02 is engaged with a shaft hole (not shown) through which the pivot 05 is inserted and two locking pins 08 and 09 facing the left and right directions with respect to the bracket 03 on the inner side surfaces of the upper ends of both leg posts 04. A support piece (not shown) having two locking grooves (not shown) that can be held in the horizontal use position and the standing position at the front and rear is provided, and the upper end of this support piece and the operation lever 013 can be operated. The locking pin moving member 015 that engages and disengages the locking pins 08 and 09 and the both locking grooves is housed between the opposing side plates of one bracket 03 that is substantially in a downward U-shape. .
[0006]
[Problems to be solved by the invention]
However, the engaging / disengaging operation between the locking pins 08 and 09 and the both locking grooves by the operation lever 013 is performed by a simple operation of only one rotation, but the operation is simple. The operation lever 013 hits an object or a knee easily to cause an erroneous operation, and there is a risk of dropping when an object is placed on the top board 02.
[0007]
The present invention has been made in view of such a situation, and eliminates an erroneous operation at the time of release operation by the operation lever when rotating the top plate held at both the use position and the standing position, thereby improving safety. An object of the present invention is to provide a safe operation device for a folding table that can be realized.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the folding table safe operation device according to the present invention is such that the top plate rotates between a substantially horizontal use position and a substantially vertical retracted position with respect to the leg support, and the both The position is maintained by the engaging means, and the engaging means is released by a one-way movement of the operating lever provided on the top plate. The folding table is a safe operating device, and the operating lever is provided on the top plate. It is composed of a sliding case body that can slide on the fixed case body, and a safety lever is attached to the sliding case body and has an elastic locking claw that can be detached from the fixed case. The lever is prevented from moving in one direction to keep the engaging means unreleasable, and the movement of the safety lever in the other direction causes the elastic locking claw to be detached from the fixed case and the one of the operating levers. Direction It is characterized in that the dynamic is released.
According to this feature, the movement direction of the safety lever and the operation direction of the operation lever are opposite to each other, and the operation lever cannot be operated unless the safety lever is moved. Can be reliably maintained. Further, the safety operation device can be assembled in two case bodies and attached compactly to the top plate.
[0009]
In the folding table safe operation device of the present invention, it is preferable that the operation lever is always elastically biased in the other direction.
In this way, even if the safety lever is operated, it is safe because the operating lever is held at a position where the engaging means can be reliably maintained by the elastic force unless the operating lever is operated.
[0010]
In the folding table safe operation device according to the present invention, the operation lever is provided at the front center of the top plate so as to be movable in the front-rear direction, and the engagement means are provided on both the left and right sides of the top plate. The lever and the engaging means are preferably mechanically connected.
In this way, the left and right actuating members 20 can be operated at the same time with one hand by operating the operating lever arranged at one place, which not only improves the operability but also when the top plate becomes free. Since the top plate can be supported by the other hand, safety is improved.
[0011]
In the folding table safety operation device according to the present invention, the engagement means is slidable in a frame pivotally attached to a support installed on the leg column, and is slid by the operation lever. It is composed of an operating member provided on the top plate side and an engaging portion formed on the support that prevents rotation of the operating member, and the blocking of the operating member is released by sliding of the operating member. It is preferable.
In this way, the posture of the folding table can be easily changed only by the sliding operation of the operating member by the operation lever.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B show a folding table provided with the safe operation device of the present invention, in which FIG. 1A is a perspective view of the folding table in a horizontal use state, and FIG. 1B is a perspective view of the folding table in a vertical retracted position. 2 is a partially enlarged side view showing the engaging means of the folding table in use, (a) of FIG. 3 is a partially broken side view showing the engaging means of the folding table, and (b) is a top plate. It is a disassembled perspective view of the safe operation apparatus in a lower surface.
[0014]
First, a folding table 1 is shown in FIG. 1, and this folding table 1 is provided at the lower ends of a pair of leg struts 4a and 4b that are arranged on the left and right sides of the bottom surface and are opened to the front and rear. It is supported by casters S and can move on the floor surface 3, and can be stopped and held at a predetermined position on the floor surface 3.
[0015]
As shown in FIG. 1A, the folding table 1 is maintained in a state in which the horizontally long rectangular top plate 2 is held substantially horizontally so that the front F is positioned in front of the leg support in use. When not in use, as shown in FIG. 1 (b), the top plate 2 is maintained in a state of being held in a substantially vertical retracted position facing upward, and is stored together with a plurality of folding tables. Can be done.
[0016]
In order to release the above-mentioned engagement state, the top plate 2 maintained in the state of being engaged and held in the horizontal position and the non-use vertical position as described above, when rotating between the two positions. The safe operating device of the present invention is provided.
[0017]
In the folding table 1, supports 5a and 5b are attached to the upper ends of a pair of left and right leg posts 4a and 4b, respectively, and the left and right supports 5a and 5b are connected by a connecting member 12. . Further, the top plate 2 is connected to a damper device D in the middle between the connecting member 12 and the horizontal frame 9a so as to alleviate the impact at the end position where the top plate 2 is rotated.
[0018]
The structure of the bottom surface of the top plate 2 will be described in detail with reference to FIGS. 2 and 3. As shown in FIG. 3 (b), the bottom surface of the top plate 2 has left and right vertical frames 8a and 8b extending forward and backward, and a pair of these. It is composed of horizontal frames 9a and 9b connected to the front and rear between the vertical frames 8a and 8b. Each of the vertical and horizontal frames 8a and 8b and 9a and 9b is formed in a U-shaped cross-section with an opening at the top. An opening 10 is formed in the front side plate at the center of the horizontal frame 9a, which is to be inserted through the ends of a pair of wires W1 and W2 connected to an operating device 15 described later.
[0019]
Further, the front horizontal frame 9a is provided with a frame cover 14 having a U-shaped cross section whose upper surface opens on the lower surface, and the ends of a pair of wires W1 and W2 inserted through the opening 10 are located at the center front. Insertion holes 14a and 14b for insertion are formed.
[0020]
A pair of long holes 16a and 16b penetrating in the width direction are formed in the front and rear at substantially the center of the left and right vertical frames 8a and 8b, and a support hole 18 is formed in an intermediate portion between the long holes 16a and 16b. ing. FIG. 3B shows the same configuration on the left and right, but only the left vertical frame 8a side is shown in detail, and the description will mainly focus on the left side.
[0021]
Inside these vertical frames 8a, a block-like actuating member 20 formed in a rectangular parallelepiped shape serving as an engaging means is inserted and fitted so as to be slidable in the front-rear direction. As shown in FIG. 2 and FIG. 3A, a through hole 22 is formed in front of the through hole 22 through which the locking shaft 26 corresponding to the one long hole 16b is inserted, and a long hole 23 corresponding to the support hole 18 is formed. And a through-hole 25 through which a locking shaft 30 for locking the other end of a tension spring 24 locked at one end in a notch groove 21 formed at the upper rear of the vertical frame 8a is inserted. It has been drilled.
[0022]
When the operating member 20 configured as described above is inserted into a substantially intermediate portion inside the vertical frame 8a, the long hole 16b of the vertical frame 8a at the corresponding position and the through hole 22 in front of the operating member 20 are respectively inserted. 3, the locking shaft 26 shown in FIG. 3A is inserted, and the locking shaft 30 is inserted through the long hole 16a on the rear side of the vertical frame 8a and the through hole 25 on the rear side of the actuating member 20, whereby the vertical frame 8a is inserted. Built in the inside.
[0023]
Further, as shown in FIG. 3 (b), the support members 5a and 5b at the upper ends of the leg posts 4a and 4b are provided with a through hole 32 in the rear bifurcated support portion 6a and on the rear end side facing surface. As shown in FIG. 3 (a), a pair of engagement grooves (engagement portions) 35 bent downward are formed. On the other hand, a pair of horizontal engagement grooves (engagement portions) 34 that open toward the front are formed on the inner surfaces of the front bifurcated support portion 6b that face each other.
[0024]
The engaging shaft 26 constituting the front engaging means and the pair of engaging grooves 34 engage with each other, so that the top plate 2 is in a substantially horizontal position and the engaging shaft 30 constituting the rear engaging means By engaging the pair of engagement grooves 35, the top plate 2 is engaged and maintained at a substantially vertical position.
[0025]
The top plate 2 supports the upper ends of both leg posts 4a and 4b by inserting the pivot 28 through the long hole 23 of the actuating member 20 from the through hole 32 formed in the back bifurcated support portion 6a of both supports 5a and 5b. It is pivotally attached to the tools 5a and 5b through a pivot 28 so as to be rotatable.
[0026]
Locking end portions W1a (shown only on the W1 side) provided at one ends of the wires W1 and W2 are locked to the locking grooves formed at the front ends of the operating members 20 incorporated in the vertical frames 8a and 8b, respectively. The wires W1 and W2 are accommodated in the vertical frames 8a and 8b and the front horizontal frame 9a in a bent state, and the other ends are connected to the operating device 15.
[0027]
Then, the other end of the tension spring 24 whose one end is locked in the notch groove 21 at the rear of the vertical frames 8a and 8b is engaged with the locking shaft 30 inserted at the rear of the operating member 20, so that the operating member 20 is moved backward. The wires W1 and W2 are energized and tension is applied.
[0028]
Next, the operating device 15 will be described in detail with reference to FIGS. FIG. 4 is an exploded perspective view of a safe operation device including an operation lever and a safety lever, FIG. 5 is a perspective view of a fixing member that slidably supports the operation lever, and FIG. 6 is an operation view of the operation device. It is a perspective view which shows a state.
[0029]
First, as shown in FIG. 4, the operating device 15 operates to release the engagement state between the locking shaft 26 and the engagement groove 34 and to release the engagement state between the locking shaft 30 and the engagement groove 35. An operation lever 36 connected to the member 20 via wires W1 and W2, a fixing member 38 which is fixed to the center of the back surface in front of the top plate 2 and engages and holds the operation lever 36 so as to be movable in the front-rear direction, and a fixing member 38 And a safety lever 40 that is elastically engaged with the pair of locking claws 42a and 42b and is released from the engagement by pushing backward.
[0030]
Specifically, the operation lever 36 is integrally formed of a synthetic resin material, and a grip portion 36a (see FIG. 6) is provided in the lower surface so as to be slidably engaged with a fixing member 38 configured as a fixed case body. It consists of a sliding case body.
[0031]
The safety lever 40 is disposed inside the sliding case body of the operation lever 36 and the fixed case body of the fixing member 38, and the release operation button 44 of the head is inserted through the insertion hole 36 b formed in front of the sliding case body 36. It is inserted and protrudes from both case bodies to the outside. The safety lever 40 includes a pair of elastic locking claws 40a and 40b that can be elastically deformed in the left-right width direction, a guide hole 45 that is formed through the center of the release operation button 44 in the operation direction, and the pair of elastic locks. The latching holes 48a and 48b are provided at the ends of elastic bands 46a and 46b that extend from the claws 40a and 40b along both sides of the release operation button 44 and are bent outward. In this manner, the safety lever 40 is sandwiched between the case bodies 36 and 38 to construct the compact operating device 15 as a whole.
[0032]
More specifically, the operation lever 36 includes a pair of locking bosses 50a and 50b for locking both the locking holes 48a and 48b at the ends of the elastic bands 46a and 46b, and inside the locking bosses 50a and 50b. A pair of bosses 52a and 52b that are provided in a projecting manner and restrict deformation in the width direction of the bent portions of the elastic bands 46a and 46b, and a guide piece that fits into the guide hole 45 and guides the safety lever 40 in the operation direction. 54, mounting bosses 55a and 55b that protrude from both sides of the guide piece 54 in the operation direction and lock the other end locking pieces W1b and W2b of the wires W1 and W2, and a pair of guides that are slidably connected to the fixing member 38. It consists of rails 56a and 56b.
[0033]
On the other hand, as shown in FIG. 5, the fixing member 38 is a pair of locking claws 42a and 42b formed on the bottom surface of the square base plate 58 and the pair of side plates 60a and 60b connected to the locking claws 42a and 42b. The regulation shaft 66 is composed of a pair of guide grooves 62a and 62b for slidingly guiding the guide rails 56a and 56b, and a frame member 64 disposed between the side plates 60a and 60b. By inserting the insertion hole 65 of the frame member 64 and screwing the threaded portion 66a at the tip of the frame member 64 to the operation lever 36, the operation lever 36 is always spring-biased rearward.
[0034]
Next, a procedure for assembling the operating device 15 configured as described above will be described with reference to FIGS.
[0035]
First, the guide piece 54 of the sliding case body 36 is inserted into the guide hole 45 of the safety lever 40, and the bent portions of the elastic bands 46a and 46b are engaged inside the pair of bosses 52a and 52b, so By inserting the locking holes 48a and 48b into the pair of locking bosses 50a and 50, the release operation button 44 is inserted through the insertion hole 36b and protrudes to the outside.
[0036]
Next, the locking members W1b and W2b at the other ends of the wires W1 and W2 are mounted on the mounting bosses 55a and 55b, and the guide rails 56a and 56b are inserted into the guide grooves 62a and 62b of the fixing member 38, thereby fixing the member. An operation lever 36 is attached to 38 so as to cover its lower surface, and in this state, the fixing member 38 is fixed to the center of the back surface in front of the top plate 2.
[0037]
As shown in FIG. 6, when the release operation is performed by the attached operation device 15 in this manner, the release operation button 44 is pressed by the thumb of the human hand H while another finger is put on the grip portion 36 a on the lower surface of the case body. By engaging and pulling out the operation lever 36 toward the front, the engaging means in front of the actuating member 20 (engagement between the locking shaft 26 and the engaging groove 34) or the rear engaging means (with the locking shaft 30). (Engagement with the engagement groove 35) can be released.
[0038]
The releasing operation procedure by the operating device 15 will be described with reference to FIGS. 7A to 7C and FIGS. 8A to 8C.
[0039]
FIGS. 7A to 7C are operation explanatory diagrams from the initial position until the engagement release operation is performed together with the pressing operation of the safety lever, and FIGS. 8A to 8C are from the engagement release operation. It is operation explanatory drawing until it returns to an initial position.
[0040]
First, the operating device 15 shown in FIG. 7A shows a state in an initial position. In this state, the top 2 is in a horizontal use position as shown in FIG. It is in the state which exists in the vertical retraction position shown to (b).
[0041]
At this time, the release operation button 44 of the safety lever 40 is inserted through the insertion hole 36b formed in the case of the operation lever 36 by the spring force of the elastic locking claws 40a and 40b engaged with the pair of locking claws 42a and 42b. At the same time, the sliding case body of the operation lever 36 is applied to the urging force of the compression coil spring 68 mounted on the regulating shaft 66 and the actuating member 20 urged rearward by the tension spring 24. The two wires W1 and W2 connected to each other are urged rearward by the cooperative action.
[0042]
Therefore, as shown in FIG. 7B, when the release operation button 44 of the safety lever 40 is pressed rearward, between the claws of both elastic locking claws 40a and 40b are elastically deformed inward and face each other. The engagement between the claws is released by contracting and deforming from the interval between the two locking claws 42a and 42b.
[0043]
Next, as shown in FIG. 7C, with the release operation button 44 pressed, the sliding case body of the operation lever 36 is pulled out to the front side, so that the mounting bosses 55a and 55b of the operation lever 36 are moved to the mounting bosses 55a and 55b. The actuating member 20 can be moved forward against the tension spring 24 via the wires W1 and W2 with which the locking pieces W1b and W2b are locked.
[0044]
Thereby, when the top plate 2 is in the horizontal position, both ends of the locking shaft 26 on the front side of the actuating member 20 are a pair of engagement members 5a and 5b forward bifurcated support portions 6b provided at the upper ends of the leg posts 4a and 4b. Detach from the mating groove 34.
[0045]
When the top plate 2 is in a vertical state, both ends of the locking shaft 30 on the rear side of the operating member 20 are provided at the upper ends of the leg posts 4a and 4b. It disengages from the pair of engaging grooves 35 bent on the lower side provided on the side facing surface. Therefore, the top plate 2 in a free state can be rotated in a horizontal state around the pivot 28 from a vertical position.
[0046]
Next, as shown in FIG. 8A, when the finger is removed from the release operation button 44 and the pressing operation is released, the elastic locking claws 40a and 40b are returned to their original positions by the elastic force of the elastic bands 46a and 46b. As shown in FIG. 8B, the sliding case body of the operating lever 36 is restored, and both wires connected to the compression coil spring 68 of the regulating shaft 66 and the operating member 20 biased by the tension spring 24 are used. It moves backward by the cooperative action with W1 and W2.
[0047]
Further, as shown in FIG. 8 (c), when the operation lever 36 moves backward, both elastic locking claws 40a, 40b move backward along the slopes facing the locking claws 42a, 42b. When it is elastically deformed inside and gets over, it returns to the initial position shown in FIG. 7A, and a series of release operations are completed.
[0048]
Therefore, according to the operating device for the folding table configured as described above, the operation lever 36 for releasing the top plate 2 maintained at the substantially horizontal use position and the substantially vertical retracted position where the front is positioned upward. The release operation of the safety lever is configured to be enabled by the release operation of the release operation button 44 of the safety lever, and the movement direction of the release operation button 44 and the release direction of the operation lever 36 are opposite to each other. There is no erroneous operation during the release operation by the operation lever 36, and safety can be achieved.
[0049]
Further, when the top plate 2 is in both the horizontal and vertical positions, the pair of wires W1 and W2 connected to the operating member 20 are coupled to a single operation lever 36 to operate the operation device 15 with one hand. Thus, the left and right actuating members 20 can be operated at the same time, and not only the operability is improved, but also the top plate 2 can be supported by the other hand when the top plate 2 is in a free state. Will improve.
[0050]
【The invention's effect】
The present invention has the following effects.
[0051]
(A) According to the invention of claim 1, since the moving direction of the safety lever and the operating direction of the operating lever are opposite to each other, and the operating lever cannot be operated unless the safety lever is moved, there is no erroneous operation. The engagement state of the engagement means can be reliably maintained. Further, the safety operation device can be assembled in two case bodies and attached compactly to the top plate.
[0052]
(B) According to the invention of claim 2, even if the safety lever is operated, the operating lever is held at a position where the engaging means can be reliably maintained by the elastic force unless the operating lever is operated. So it is safe.
[0053]
(C) According to the invention of claim 3, the left and right actuating members 20 can be operated at the same time with one hand by operating the operating lever arranged at one place, and the operability is improved. When the free state is entered, the top plate can be supported by the other hand, so safety is improved.
[0054]
(D) According to the invention of claim 4, the posture of the folding table can be easily changed only by sliding operation of the operating member by the operation lever.
[Brief description of the drawings]
FIG. 1 shows a folding table provided with a safe operation device of the present invention, wherein (a) is a perspective view of the folding table in a horizontal use state, and (b) is a perspective view of the folding table in a vertical retracted position. is there.
FIG. 2 is a partially enlarged side view showing the engaging means of the dropped private table in use.
3A is a partially cutaway side view showing the engaging means of the folding table, and FIG. 3B is an exploded perspective view of the safe operation device on the bottom surface of the top plate.
FIG. 4 is an exploded perspective view of a safe operation device including an operation lever and a safety lever.
FIG. 5 is a perspective view of a fixing member that slidably supports an operation lever as viewed from the back side.
FIG. 6 is a perspective view showing an operating state of the operating device.
FIGS. 7A to 7C are operation explanatory views from the initial position until the engagement release operation is performed together with the pressing operation of the safety lever.
FIGS. 8A to 8C are operation explanatory diagrams from the disengagement operation to the return to the initial position.
FIG. 9 is a side view of a conventional folding table showing a state in which the top plate is held in a horizontal position.
FIG. 10 is a side view of a conventional folding table showing a state in which the top plate is folded in an upright state.
[Explanation of symbols]
1 Folding table 2 Table (top plate)
3 Floor surface 4a, 4b Leg support 5a, 5b Support tool 6a Rear bifurcated support portion 6b Front bifurcated support portion 8a, 8b Vertical frame 9a, 9b Horizontal frame 10 Opening 12 Connecting member 14 Frame cover 14a, 14b Insertion hole 15 Operating device 16a , 16b Long hole 18 Support hole 20 Actuating member 21 Notch groove 22 Through hole 23 Long hole 24 Tension spring 25 Through hole 26, 30 Locking shaft 28 Pivot 32 Through hole 34, 35 Engaging groove (engaging portion)
36 Operation lever (sliding case)
36a Grasping part 36b Insertion hole 38 Fixing member (fixed case body)
40 Safety lever 40a, 40b Elastic locking claw 42a, 42b Locking claw 44 Release operation button 45 Guide hole 46a, 46b Elastic band 48a, 48b Locking hole 50a, 50b Locking boss 52a, 52b Boss 54 Guide piece 55a, 55b Mounting bosses 56a, 56b Guide rail 58 Base plates 60a, 60b Side plates 62a, 62b Guide grooves 64 Frame member 65 Insertion hole 66 Restriction shaft 66a Screw portion 68 Compression coil spring D Damper device F Front H Manual work W1, W1 Wire W1a, W2a Locking piece W1b, W2b Locking piece

Claims (4)

The top plate rotates between a use position that is substantially horizontal with respect to the leg column and a retracted position that is substantially vertical, and both the positions are maintained by the engagement means. In the folding table safe operation device that is released by one-way movement of the provided operating lever,
The operating lever is configured by a sliding case body that is slidable on a fixed case body provided on the top plate, and a safety lever is attached to the sliding case body and is elastically detachable with respect to the fixed case. The operation lever is prevented from moving in one direction by the safety lever and maintains the engagement means in an unreleasable manner, and the elastic locking claw is fixed to the fixed case by movement in the other direction of the safety lever. The folding table safe operation device according to claim 1, wherein the operation lever is released from the movement in the one direction.   The safety operation device for a folding table according to claim 1, wherein the operation lever is always elastically biased in the other direction.   The operating lever is provided at the front center of the top plate so as to be movable in the front-rear direction, the engaging means are provided on both the left and right sides of the top plate, and the operating lever and the engaging means are mechanically connected. The folding table safe operation device according to claim 1 or 2.   The engaging means is slidable in a frame pivotally attached to a support device installed on the leg strut, and an operating member provided on the top plate side that is slidably operated by the operation lever; The rotation part of this operation member is comprised by the engaging part formed in the said support tool which blocks | prevents rotation of an operation member, The rotation prevention of this operation member is cancelled | released by sliding of the said operation member. Folding table safe operation device.

Images