JPS6239722Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an inward folding type folding table that can be used for various types of tables (including tables), and in particular can be effectively used as a table on which a large load is applied, such as a work table.

For inward-folding folding tables, during use, the central part,
That is, when a pressing pressure is applied to the abutting portions of the left and right base plates, there is a problem in that when the base plates are lightweight, they unexpectedly rotate in the folding direction. For this reason, conventional folding tables are generally used only for tables where the above-mentioned center load does not apply, or even if it does, the load is light and does not pose a problem (for example, table tennis tables), The reality is that they are rarely used on workbenches where loads are applied.

Therefore, the present invention is capable of locking the base plate in the unfolded state, and therefore can be fully used as a platform on which a large load is applied, such as a workbench.Furthermore, it can be locked automatically and unlocked easily. The purpose is to provide an inward folding type folding table.

The features of this invention are that the left and right base plates,
It is equipped with a folding mechanism that connects the two base plates so that they can be folded inwards at their abutting portions, and left and right legs that are foldably pivoted to the lower surfaces of both base plates. , is pivotally connected via left and right horizontal bars provided below the base plate in parallel with the base plate, and a horizontal bar connecting body provided straddling the two horizontal bars at the abutting portion of the base plate. In the inward folding type folding table, a lock pin is provided in a portion of the left and right horizontal bars on the distal side of the pivotal connection portion to the horizontal bar connecting body, and a pair of hook-shaped hooks that can be engaged with and detached from the lock pins are provided on the horizontal lever connecting body. A slider equipped with an engaging portion and capable of sliding in the left-right direction is provided, and a lever for sliding the slider in a direction in which the engaging portion is disengaged from the lock pin. An inclined guide surface for sliding the slider is provided so that the engaging portion and the lock pin are automatically engaged at the end of the operation, and the engaging portion is connected to the lock pin between the slider and the horizontal rod connecting body. The invention resides in an inward folding type folding table provided with a spring that exerts a spring force in an engaging direction.

Embodiments of the present invention will be described below with reference to the drawings.

Reference numerals 1 and 2 denote left and right base plates, and both base plates 1 and 2 are provided with foldable outer legs 3 and inner legs 4, respectively. The lateral leg body 3 has a pair of front and rear footnotes 3
a, 3a, and a base 3b attached between the lower ends of the two pillars 3a, 3a, and fixedly supports the base plates 1, 2 in the expanded state. The inner leg body 4 supports the base plates 1 and 2 in the unfolded state, and also allows the base to be independent and movable in the folded state. It consists of Reference numerals 5 and 6 are horizontal bars made of angle materials, etc., which are provided in pairs on the lower surfaces of both base plates 1 and 2 in the front and rear, and are connected to the outer and inner legs 3 and 4.
The upper ends of the front and rear pillars 3a, 4a are pivotally attached to the horizontal bars 5, 6.

7 and 8 are horizontal bars arranged parallel to the horizontal bars 5 and 6 below the front and rear sides of the base plates 1 and 2, and both base plates 1 and 2
The front and rear pillars 3a, 4a of both side legs 3, 4 in
The upper part of the frame is pivotally connected to the horizontal bars 7 and 8. The ends of the inner legs 4, 4 of both the horizontal rods 7, 8 are connected to the horizontal rod connecting body 9, which is approximately in the shape of an inverted T, at the portion where the base plates abut, and the pins 7a,
It is rotatably pivoted at 8a. In this way, the legs 3 and 4 of both base plates 1 and 2 are interlocked and connected via the horizontal rods 7 and 8 and the horizontal rod connecting body 9.
4 work together on the left and right to simultaneously fold and unfold,
In addition, they are configured to support each other in an upright state in the unfolded state. As shown in FIG. 4, the horizontal rod connecting body 9 has a double plate structure in which two plates of the same shape and size are connected in parallel. is pivotally connected to this horizontal rod connecting body 9 in a state introduced between both plates. Also, the perspective view in Figure 4 shows the view from the opposite side (inside the stand) from Figure 3 (in each figure, the horizontal rod 7 is visible on the right side of the figure, and the horizontal rod 8 is visible on the left side of the figure). (same for).

Next, the configurations of a folding mechanism that foldably connects both base plates 1 and 2 and a deployment lock mechanism that locks the base in the unfolded state will be explained. However, since these configurations are basically the same on both the front and rear sides, only one will be explained below, and the relationship between the front and rear configurations will be explained as necessary.

() Folding mechanism This folding mechanism includes each pair of first links 10,
10, second link 11, 11, third link 12,
12, and the horizontal rod connecting body 9 is also used as a component. That is, the L-shaped first links 10, 10 intersect each other at their centers, and the intersecting portion is pivotally connected to the upper part of the horizontal rod connecting body 9 with a pin 14 through a vertically long hole 13. There is. The second links 11, 11 have their upper ends pivotally connected to the horizontal bars 5, 6 at a portion outside the upper end of the first link,
The lower end portion is pivotally connected to the lower end portions of the first links 10, 10. Further, the third links 12, 12 are formed in an L-shape, and their upper ends are pivotally connected to the horizontal bars 5, 6 between the first and second links, and their lower ends are connected to the horizontal bars 7 of the horizontal bar connecting body 9. , 8 are pivotally attached using pins 7a and 8a. The first links 10, 10 and the third links 12, 12 each have a double plate structure, similar to the horizontal rod connecting body 9.

In such a configuration, when the base plates 1 and 2 are rotated in the inward folding direction from the unfolded state, the base plates are pulled apart by the first links 10 and 10, and the base plates are pushed up by the second links 11 and 11. Due to this action and the rotation regulating action of the third links 12, 12, as shown in FIG. Finally, as shown in FIGS. 5B and 6, the two surfaces are folded into an upright position facing each other at a predetermined distance. Note that the pin 14 that pivotally connects the intersection of the first links 10, 10 to the horizontal rod connecting body 9 is as follows:
Along with the folding operation, it moves down inside the long hole 13, and when the folding is completed, it is located at the lower end of the long hole 13 and exerts a stopper action. This prevents the base plates 1 and 2 from rotating further inward than the parallel state. Therefore, there is no risk that the base plates 1 and 2 will bump into each other or that fingers will be caught between the base plates.

() Deployment lock mechanism As shown in FIG. The main component is a slider 17 provided at 9. The lock pins 15 and 16 are attached to the left and right horizontal rods 7 and 8.
It is provided horizontally protruding from the inner surface of the portion on the distal side of the portion pivotally attached to the horizontal rod connecting body 9. Note that 9a and 9a in FIGS. 7A, 7B and 7C are notches provided in the horizontal rod connecting body 9 (the inner plate of the inner and outer plates) to provide relief for the lock pins 15 and 16. On the other hand, the slider 17 has both the lock pins 15 and 16
A pair of left and right hook-like engaging portions 18, 1 that can be engaged and disengaged from the
9 integrally, and a pin 2 on the inner side of the horizontal rod connecting body 9.
0, 20 and horizontally elongated holes 21, 21 so as to be able to slide within a certain range in the left and right direction. The engaging portions 18 and 19 of the slider 17 both have guide surfaces 18a and 19 inclined on the lower surface side.
a, and as shown in FIG. 7C, lock pins 15,
16 abut against each other, the engaging portions 18 and 19 move in a direction away from the pins 15 and 16. 22
is a tension coil spring that applies a spring force to the slider 17 in the direction of engaging the engaging parts 18, 19 with the lock pins 15, 16, and this spring 22 causes the engaging parts 18, 19 to engage with the lock pins 15, 16. situation,
In other words, the platform expansion lock state is ensured. Also,
The spring 22 causes the guide surfaces 18a, 19a to
The engaging portions 18, 19, which have once escaped from the lock pins 15, 16, are pulled back by the action of the lock pins 15, 16.
6 to automatically engage.

To explain the lock release structure, a lever 23 for lock release operation is attached to the outer surface of the horizontal rod connection body 9 via a lever shaft 24 so as to be rotatable left and right. The lever shaft 24 is suspended between the horizontal rod connecting bodies on both the front and rear sides, and has protruding rods 25 protruding on both the front and rear sides of the lever shaft 24 that are engaged with and connected to the protruding pieces 26 of the slider 17 . thus,
By operating the lever 23, the sliders 1 on both the front and rear sides are moved.
7 can be slid in conjunction with each other.

In the unfolded state, the engaging portions 18 and 19 of the slider 17 and the lock pins 15 and 16 engage with each other, as shown in FIG.
rotation is prevented, and the entire support is locked in the deployed state. At this time, the lever 23 is in a vertically hanging position. When folding the table from this state, the slider 17 is slid by rotating the lever 23 as shown in FIG. The lock is thus released, and in this state, by pushing down the abutting portions of the base plates 1 and 2, the entire base can be folded as described above. on the other hand,
When this platform is expanded again, the aforementioned engaging portion guide surfaces 18a and 19a at the final stage of the expansion operation.
By the action of the spring 22, the engaging portions 18, 19 and the lock pins 15, 16 are engaged, and the lock pins 15, 16 are automatically locked.

When this inward folding type folding table is used, as described above, since it has a locking function in the unfolded state, there is no fear of unexpected folding and rotation even if pressing pressure is applied to the abutting portion of the table plate. For this reason, it can be fully used as a workbench or the like on which a large load is applied. Furthermore, the deployment lock is automatically performed, and the lock can be easily released by simply operating a lever.

Next, a second embodiment of the present invention will be explained with reference to FIG. In the first embodiment, the lever 23 that has been operated to the unlocked position is held in that position with one hand, while the base plates 1 and 2 are folded with the other hand. In contrast, in the second embodiment, the lever 23, ie, the slider 17, can be automatically held at the unlocked position. That is, to explain only the differences from the first embodiment, a lock release holder 27 is attached to the inside of the slider 17 so as to overlap one of the engaging portions 19 so as to be rotatable around a support shaft 28. The holder 27 is provided with a protrusion 29 projecting obliquely upward, an inclined surface 30 including a side surface of the protrusion 29, and a recess 31 that can engage with the lock pin 16 inside the protrusion 29. There is. 32 is a notch provided on the top surface of the holder; 33
is a stopper pin located in the notch 32 and protruding from the slider 17, which allows the holder 27 to be
The amount of rotation is regulated within a certain range. Further, 34 is a tension coil spring that applies rotational force to the holder 27, and is tensioned between the slider 17 and the lower end of the holder.

In the unfolded state, the holder 27 is in a state in which the recess 31 is engaged with the lock pin 16, as shown in FIG. 8A. At this time, the spring 34
Since the axis of the holder is deviated from the holder support shaft 28 to the right in the direction shown in the figure, the tensile force of the spring 34 acts on the holder 27 with a rotating force in the direction of the arrow A in FIG. When the lever 23 is operated to slide the slider 17 from this state, the holder 27
moves together with the slider 17, and as its protrusion 29 is pushed down by the lock pin 16, the holder 27 once rotates in the direction opposite to the arrow A direction against the spring 34, and is removed from the lock pin 16. At this time, it returns to its original state as shown in FIG. 8B. In this state, the protrusion 29 of the holder 27 is attached to the lock pin 1.
6, thereby preventing the holder 27 and the slider 17 from returning to their original positions. In this way, slider 17 and lever 23 are automatically held in the unlocked position. Therefore,
Since it is not necessary to hold the lever 23 in the unlocked position with one hand as in the case of the first embodiment, the folding operation becomes easier.

When the table is folded and rotated in the unlocked state, the lock pin 16 moves downward along a predetermined trajectory, and as the pin 16 moves, the inclined surface 30 of the holder 27 is pulled back from the lock pin 16 by the pulling back action of the spring 22. , the slider 17 moves toward its original position. During this slider movement, the holder 27 is pushed by the lock pin 16 through the inclined surface 30 and rotates, and when the lock pin 16 reaches the lower end of the inclined surface 30, as shown in FIG.
It rotates to an angular position regulated by the notch 32 and stopper pin 33. This rotation of the holder 27 causes the axis of the spring 34 to shift to the left of the center of the support shaft 28, so that from now on the holder 27 receives a rotational force in the direction of arrow B in FIG. 8C due to the spring 34. This holds the holder 27 in the state shown in the figure.

After this, when the platform is unfolded again, at the end of the unfolding operation, the lock pins 15 and 16 and the guide surfaces 18 of the engaging parts 18 and 19 of the slider 17
The slider 17 slides against the spring 22 due to the guiding action of the springs a and 19a. Therefore, the lock pin 16 rises along the inclined surface 30 of the holder 27 from the position shown in FIG.
6 reaches above the protrusion 29 of the holder 27, the slider 17 moves back due to the tensile force of the spring 22, and the lock pin 16 engages with the recess 31 of the holder 27. By this engagement, the holder 27 is rotated back to the state shown in FIG. 8A.

Although it is sufficient to provide the above-mentioned mechanism for releasing and holding the lock on either the front or rear deployment lock mechanism, it may be provided on both in consideration of the balance between the front and rear. However, this lock release holding mechanism is an additional mechanism to the deployment lock mechanism and is not an essential requirement for the present invention, and the intended purpose of the present invention can be sufficiently achieved even without this mechanism. . Furthermore, in the above embodiment, the unfolding lock mechanism and the folding mechanism are centrally provided at the same location with the horizontal rod connecting body 9 being shared by both mechanisms, but these two mechanisms are separately provided. You can. Furthermore, the folding mechanism can be modified in various ways other than those mentioned in the above embodiments. On the other hand, although it is of course desirable to provide the deployment lock mechanism on both the front and rear sides, the intended purpose of the present invention can be fully achieved even if the deployment lock mechanism is provided on only one of the front and rear sides. In addition, the lever 23 for slidingly operating the slider 17 is
It may be provided on both the front and rear sides as shown in Figure 2, or
It may be provided only on one side. Further, it is also possible to use a sliding lever instead of the rotary lever 23.

As described above, according to the present invention, since the table can be locked in the unfolded state, it becomes possible for the first time as an inward folding type folding table to be used as a table to which a large load is applied, such as a work table. Furthermore, since the unfolding locking action is performed automatically, and the locking upon folding can be easily performed only by operating a lever, the provision of this locking mechanism unnecessarily complicates the operation. It is extremely useful in practice, as there is no danger.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a front view of the entire stand, Fig. 2 is a side view of the same, Fig. 3 is an enlarged front view showing the folding mechanism and unfolding lock mechanism, and Fig. 4 is the same mechanism. 5A and 5B are views corresponding to FIG. Figure 8A is a front view of the unfolding lock mechanism as seen from the inside of the stand, showing each of its working processes.
7B and 7C are views corresponding to FIGS. 7A, 7B and 7C showing another embodiment of the present invention in which an unlocking and holding mechanism is added. 1, 2... base plate, 3, 4... leg body, 7, 8...
Horizontal rod, 9...Horizontal rod connection body, 10, 11, 12...
Links constituting the folding mechanism, 17... slider, 18, 19... engaging portion, 18a, 19a...
Guide surface, 22... spring, 23... lever.

Claims (1)

[Scope of utility model registration request] It is equipped with left and right base plates, a folding mechanism that connects the two base plates so that they can be folded inwards at their abutting portions, and left and right legs that are pivotally attached to the lower surfaces of both base plates so that they can be folded. , the left and right scripts are connected to each other via the left and right horizontal bars provided below the base plate in parallel with the base plate, and the horizontal bar connector provided across the two horizontal bars at the butt part of the base plate. In the inward folding type folding table formed by a pivot connection, a lock pin is provided at a distal end side of the pivot connection portion of the left and right horizontal rods to the horizontal rod connection body, and a lock pin is provided on the horizontal rod connection body, and a lock pin is provided on the side rod connection body. A slider that is slidable in the left-right direction and is provided with a pair of hook-like engaging portions that can be engaged and disengaged, and a lever that slides the slider in a direction in which the engaging portion is disengaged from a lock pin are provided, and the slider is engaged. The part is provided with an inclined guide surface for sliding the slider so that the engaging part and the lock pin are automatically engaged at the end of the base plate expansion operation, and between the slider and the horizontal rod connecting body, An inward-folding folding table characterized by being provided with a spring that exerts a spring force in a direction that causes the engaging portion to engage with the lock pin.