JP3612605B2 - Ultra thin jack - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an ultra-thin jack. For example, the height of the folded position of the main body is very low and the volume is small, such as inserting it into a small gap in the bottom like a saddle type piano and lifting a heavy thing like this piano In spite of this, it is a Dicky that has the power to lift a considerable weight as much as several times its original height.
[0002]
[Prior art]
Conventionally, for example, when lifting a saddle-type piano or the like, the height of the Zikki main body is extremely limited (the bottom gap of the saddle-type piano is generally about 20 mm) and weight Strictly speaking, there was no equivalent of jacks that lifted a large object in a simple and stable state and several times the original.
[0003]
However, in order to achieve this purpose, there have conventionally been a bar type, an air jack type, etc. with a thin plate-like metal plate at the tip. In addition, there is a leveling block in which wedge-shaped iron pieces are combined in opposite directions, and the upper iron piece is pulled and slid with a screw, so that the upper iron piece is lifted.
[0004]
The above-mentioned bar type and air jack type are very unstable, and the leveling block is low in the height of the main body, and it is possible to lift a heavy weight. However, its operating height dimension is less than twice the initial height dimension of the body.
Although there is a pantograph type jack, it is necessary to have a certain height when folded because of its function. If this is thin (for example, 3 centimeters or less), It is not strong enough to lift a heavy object such as a piano.
[0005]
In addition, there are forklifts etc., but the main body is very large in size and weight, so it can only be used in special places.
[0006]
[Problems to be solved by the invention]
The present invention solves the problems of these conventional products based on a completely new concept. The thickness of the top and bottom of the main body operating part when folded is extremely thin, and is inserted into a small gap. In comparison with that, it is possible to float a considerable heavy object several times as much as the original thickness of the main body, and it is small and portable.
[0007]
[Means for solving problems]
That is, the configuration of the present invention is roughly described as follows.
First, an interrupter 12 that has a guide rail 2 as a base and rides on the upper portion of the guide rail 2 from a position of zero height is provided. On the other hand, one end of the interrupter 12 is guided by being interrupted by the interrupter 12. An arm 8 that gradually rises from a horizontal height equivalent to that of the rail 2 is attached so as to rotate around a fulcrum 7.
[0008]
And in order to operate these, the bolt 14 which penetrates the center part of the interrupter 12 is provided, and the interrupter 12 slides in a horizontal direction by rotation of this bolt 14, and the guide rail 2 and the arm 8 and It is designed to interrupt and leave during the period.
A levitation base 19 that is lifted by the levitation of the tip of the arm 8 is attached to the top.
[0009]
【Example】
[0010]
[First embodiment]
That is, this is constituted as follows when the first embodiment is shown in FIGS.
(A) First, on the upper surface of the platen 1 (which is made of a thin steel plate, etc.) that also serves as a curing function for the floor on which this jikki is installed, it itself has an appropriate thickness and is parallel to each other. Then, the pair of guide rails 2 are fixed by welding or the like. (For example, for the purpose of using the present invention for levitating a saddle-type piano, etc., the thickness of the guide rail 2 is required to be as high as that of the platen 1 and the later-described levitating stand 19 in order to keep the overall thickness to 20 mm. (The ideal thickness is 15 to 16 mm after subtracting the thickness.)
The guide rail 2 also serves as a reinforcement for the platen 1.
[0011]
(B) The end portions 3 and 3 on both sides of the two guide rails 2 fixed to the platen as a pair have their upper surfaces 4 and 4 gradually inclined toward the tip portions 5 and 5 of the guide rail 2, respectively. Then, it descends and crosses the bottom surface 6 of the guide rail 2 so that the end portions 5 and 5 of the guide rail 2 end in a pointed state. In this case, the tip may not be completely sharp like a knife, but may have some thickness and roundness.
[0012]
(C) Arms 8 and 8 that are supported at one end by two fulcrums 7 and 7 that are rotating shafts are provided at two locations (a total of four locations) of the guide rails 2 as a pair.
In this case, the positions of the two fulcrum points 7 and 7 (a total of four places) are positions located closer to the center by the same distance from the respective tips of the guide rails 2. The two fulcrums 7 and 7 on one guide rail may be in the center of the guide rail 2, but it is better for stability of the levitation base 19 to be described later that they are separated from each other by an appropriate size.
[0013]
In addition, the height (thickness) dimension of the arm is desirably equal to the height (thickness) of the guide rail 2 itself for the purpose of ultra-thinness and heavy weight floating aimed at by the present invention.
[0014]
(D) One end of the arm 8, 8 opposite to the side fixed to the fulcrum 7, 7 has its lower surface 9, 9 inclined gradually toward the tip portions 10, 10 of the arms 8, 8. Then, when it is going to rise and eventually crosses the upper surface 11, 11 of the arm, it ends with some suitable thickness left.
[0015]
The tip portions 10 and 10 need to lift a later-described levitation base 19 at this point, so that the tip portion 10 and 10 are not so sharp and are necessary to prevent the interrupter 12 to be described later from interrupting from the tip. Give it an appropriate thickness and roundness.
It should be noted that the arms 8 and 8 have a distal end portion 10 and 10 that is subjected to a considerable force for lifting the levitation base 19, so that the material used is as hard as possible, such as steel, manganese steel, and stainless steel. Better. This can be said for an interrupter 12 (described later) in which a large amount of force is applied to a small area, and also for a guide rail 2 and a levitation base 19 having a high degree of wear.
[0016]
(E) An interrupter 12 that slides between the upper surface 4 of the paired guide rails 2 and the lower surfaces 9 and 9 of the paired arms 8 and 8 from both ends thereof. , 12 are provided.
When the ultra-thin jack of the present invention is folded, the interrupter 12 is disengaged on an external platen that is further away from the guide rails 2 and the ends of the arms 8. It is assumed that the guide rail 2, the arm 8, and the interrupter 12 are all at the same horizontal height at this point.
[0017]
The height dimension (thickness) of the interrupter 12 is preferably equal to or the same as the height dimension (thickness) of the guide rail 2.
Furthermore, in the portion of the interrupter 12, the portion of the surface corresponding to the guide rail or arm needs to be inclined or rounded to make it easier to interrupt them. (In the diagram of this embodiment, the interrupter is a round bar.)
[0018]
(F) Each of the interrupters 12 and 12 is provided with a female screw portion 13 at the center thereof. Corresponding to the female screw portion 13, a bolt 14 having a male screw passing therethrough is provided in a direction perpendicular to the interrupter.
[0019]
(G) The male screw to be cut by the bolt 14 is such that a pair of interrupters 12 and 12 located near both ends of the bolt are attracted to each other by the rotation of the bolt, or in the opposite directions of the body by the reverse rotation. In order to be kept away, the screw is cut into right and left reverse screws around the center (in the embodiment, the center is screw-free).
[0020]
(H) A screw guide 15 is provided at one end of the platen 1 in order to prevent the bolt 14 from moving in the longitudinal direction or in the left-right direction, and one end of the bolt 14 passes through the screw guide. To.
[0021]
(I) Bolt penetration holes 16 provided in the screw guide 15 have a width that allows the bolts 14 to penetrate sufficiently in the horizontal direction, and at least the height of the guide rail 2 to the bolt penetration width in the vertical direction. The inner width is the sum of the dimensions. The reason why the inner diameter is increased in the vertical direction is that the bolts 14 are inevitably lifted upward by the height of the guide rail when the interrupter 12 rises above the guide rail 2.
[0022]
(N) At the portion where the bolt 14 penetrates the screw guide 15, the flange-shaped rocking stools 17 and 17 are fixed to the bolt 14 so as to sandwich the screw guide 15 and prevent the bolt from moving in the longitudinal direction. Provide.
[0023]
(L) A connection port 18 (socket) for attaching a handle such as a ratchet handle or a crank handle for rotating the bolt is provided at one end of the bolt. The aforementioned ratchet handle, crank handle or the like is connected to the connection port 18 to rotate the bolts. However, since the bolts are very low, it is necessary to operate these handles obliquely from above. Therefore, it is preferable to use a universal joint 24 (universal joint) in advance at the connection port 18.
[0024]
In addition, when using a ratchet handle, it is better to mediate a long rod-shaped joint (joint) between the ratchet handle and the universal joint at the connection port, and turn this joint with one hand. The universal joint is easy to handle because it does not distort.
[0025]
(V) A levitation base 19 is provided on the arm 8. The arm 8 stands up or sleeps while sliding the tip of the pointed side on the back surface of the levitation base 19, and the levitation base 19 moves up and down accordingly.
[0026]
(W) An arm guide 20 that guides the slide of the arm 8 is welded to the levitation base 19 by welding or the like and provided integrally with the levitation base 19 in the longitudinal direction on the lower surface.
The both ends of the arm guide 20 are scraped off at the same angle as the arm so as not to prevent the interrupter 12 from entering the interrupt.
The arm guide 20 also has a role to reinforce the levitation base 19, so that it is ideal that the height dimension is as high as possible within the range not exceeding the height of the guide rail 2. . The mounting position of the arm guide is ideally between the arm 8 and the bolt 14 because of its function.
[0027]
(F) An auxiliary arm 21 is provided in order to prevent the levitating base 19 from moving away from the main body or to move in the longitudinal direction when it is lifted. The attachment position of the auxiliary arm 21 is one method that is preferably attached between the arm guide 20 and the arm 8 that are a part of the levitating base 19, but is not limited to this, and the arm guide 21 and the guide are not limited thereto. A pantograph type may be provided between the rail 2 and the rail 2.
[0028]
The auxiliary arm 21 can be attached to only one pair of arms. However, the auxiliary arm 21 may be provided at two arms on both sides.
Furthermore, the fulcrum 22 between the auxiliary arm 21 and the arm guide 20 has a slight distance between the isosceles sides of the isosceles triangle formed between the arm tip portion 10, the fulcrum 22 and the fulcrum 23. It is better to have a little play to absorb the deviation.
[0029]
[Second embodiment]
The second embodiment is configured as follows as shown in FIG.
(A) The guide rails 2 and 2 which have two pairs in parallel with each other and which are divided in the longitudinal direction are fixed on the upper surface of the platen 1.
[0030]
(B) In the four pairs of guide rails 2 and 2 in one pair, one end portions 3 and 3 directed in the same direction are lowered with the upper surfaces 4 and 4 being inclined gradually. It intersects with the bottom surfaces 6 and 6 of the rail 2 so that the end portions 5 and 5 of the guide rails 2 and 2 are finished in a sharp state.
[0031]
(C) The two pairs of guide rails 2 and 2 are supported at one end of each of the non-pointed ends (a total of four locations) by fulcrums 7 and 7 that are rotation axes, all in the same direction. Are provided.
[0032]
(D) One end of the lower surface 9, 9 of the arm 8, 8 that is not supported by the fulcrums 7, 7 is gradually inclined upward toward the tip portions 10, 10 of the arm. When trying to cross the upper surface 11, 11, the process ends with some suitable thickness left. In the embodiment, the tip is appropriately rounded.
[0033]
(E) Between the upper surfaces 4 and 4 of the two pairs of guide rails 2 and 2 and the lower surfaces 9 and 9 of the arms 8 and 8 which are also two pairs, an arm is provided from one of the sharp ends thereof. Interrupters 12 and 12 are provided which slide in and slide toward the fulcrums 7 and 7 with the guide rail.
[0034]
(F) Each of the interrupters 12 and 12 is provided with a female screw portion 13 at the center thereof, and a bolt 14 having a male screw penetrating therethrough corresponding to the female screw portion 13 is defined as an interrupter. Is provided in the vertical direction.
[0035]
(G) The male screw to be cut by the bolt 14 is the right or left screw in the same direction for both interrupters 12 and 12.
[0036]
(H) One end of the bolt 14 is provided at one end of the platen 1 and a screw guide 15 is provided to prevent the bolt from moving in the longitudinal direction and from moving to the left and right.
The screw guide in the second embodiment must be made more robust than in the first embodiment because the bolt 14 has to accept the force that the bolt 14 is pulled or pushed back and forth.
[0037]
(I) Bolt penetration holes 16 provided in the screw guide 15 have a width that allows the bolts 14 to penetrate sufficiently in the horizontal direction, and at least the height of the guide rail 2 to the bolt penetration width in the vertical direction. The inner width is the sum of the dimensions.
[0038]
(N) Flange-shaped sway stoppers 17 and 17 are provided at portions where the bolt 14 penetrates the screw guide 15 so as to sandwich the screw guide 15 and prevent the bolt from moving in the longitudinal direction.
[0039]
(L) A connection port 18 for attaching a handle such as a ratchet handle or a crank handle for rotating the bolt is provided at one end of the bolt. Also in the case of the second embodiment, as in the case of the first embodiment, a universal joint may be attached to the connection port 18 in advance.
[0040]
(V) A levitation base 19 is provided on the arm 8. The pointed end of the arm moves up and down while sliding on the lower surface of the levitation base 19, and the levitation base 19 moves up and down accordingly.
[0041]
(W) The levitation base 19 is provided with two pairs of arm guides 20 for guiding the slide of the arm 8 in the longitudinal direction of the lower surface thereof. At one end of the arm guide 20, one end where the interrupter 12 enters the interrupt is cut obliquely so as not to prevent the interrupter from entering the lower part.
[0042]
(F) In order to prevent the levitation base 19 from being separated from the main body or moving in the longitudinal direction, the auxiliary arm 21 is provided with a part of the levitation base 19 such as the arm guide 20 and a part of the main body such as the arm 8. Provide between.
In the second embodiment, the male screw of the bolt 14 does not need to be switched to the left and right, and the cost can be reduced. However, since the guide rail 2 and the arm guide 20 are divided in the middle, the strength is weaker than that of the first embodiment. In addition, the guide rail, levitation table, etc. need to be reinforced.
[0043]
[Action]
The ultra-thin jack of the present invention is operated as follows.
In the first embodiment,
First, the main body is inserted into the lower gap of a heavy object to be lifted up and down (for example, a bowl-shaped piano).
[0044]
A handle such as a crank handle or a ratchet handle is connected to the connection port 18 at the tip of the bolt in the main body by insertion or the like. As described above, at this time, it is convenient to provide a universal joint (universal joint) in the connection port 18 in advance, because the handle can be operated obliquely from above.
[0045]
When the handle is turned, the bolts 14 are rotated, and due to this rotation, the pair of interrupters 12 that have been laid on the platen 1 at the beginning are removed from the guide rails 2 and the arms 8 from both ends of the main body toward the center. At the same time, the interrupter 12 is inserted between the guide rail 2 and the arm 12.
[0046]
The interrupter 12 gradually gets on the guide rail 2, and at the same time, the arm 8 is stopped at one of the fulcrums 7, so that the pointed tip portion 10 gradually rises. As a result, the levitation base 19 on the arm 8 is lifted, and a heavy object (for example, a bowl-shaped piano) placed on the levitation base is lifted. When lowering the bolt, turn the bolt in the opposite direction with the handle, and the jack will come down naturally with the weight of the heavy object.
[0047]
The levitation base 19 does not shift back and forth in the longitudinal direction because the auxiliary arm acts as a pantograph.
[0048]
【The invention's effect】
As described above, the jack of the present invention is capable of lifting a heavy weight, but it is nevertheless extremely thin. The reason is that when this jack is folded, all the parts that act as lift, that is, the guide rail 2, the arm 8, and the interrupter 12 fall within the horizontal range of the minimum height. .
[0049]
For example, even if a pantograph-type jack is considered to be relatively short when it is folded, it will be lifted to some extent from the beginning when each part of the pantograph is folded. An angle is attached in the state. Otherwise, it is impossible to lift from a zero angle state. However, according to the present invention, the portion of the arm 8 that gives lift can stand up from a position of zero angle. Therefore, it is possible to make it ultra thin despite having a large lift.
[0050]
Also, unlike the pantograph type, there is no need for a particularly large force at the time of initial operation, so that it lifts up smoothly from the beginning.
[0051]
In the case of a leveling block, etc., there is a lift that lifts a heavy weight, but the operating width is less than twice that of the original, and it gradually shifts forward as it lifts. However, according to the present invention, it is possible to obtain an operating range that is several times higher than the original, and there is no worry that the position of the heavy object to be lifted is shifted by the function of the auxiliary arm 21. .
[0052]
Furthermore, since the levitation base 19 is supported by the front and rear arms 8, it is lifted while maintaining the horizontal position, so there is no instability as in the case of levitation with a bar or levitation with an air jack. However, it can be operated with ease and peace of mind.
In addition, since the levitating base 19 is supported by the two pairs of arms 8 at the front and rear, for example, a heavy object can be levitated on a part of the end of the levitating base 19 to be levitated.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of an ultra-thin jack according to the present invention.
FIG. 2 is a side view showing a partial cross section showing a state when the first embodiment is folded;
FIG. 3 is a side view showing a partial cross section showing a folded state of a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Plate stand 2 Guide rail 3 End part 4 Upper surface 5 Tip part 6 Bottom surface 7 Support point 8 Arm 9 Lower surface 10 Tip part 11 Upper surface 12 Interrupter 13 Female screw part 14 Bolt 15 Screw guide 16 Hole 17 Shaking prevention 18 Connection port 19 Levitation stand 20 arm guide 21 auxiliary arm 22 fulcrum 23 fulcrum 24 universal joint

Claims (2)

An ultra-thin jack constructed as follows.
(A) A pair of guide rails 2 having a suitable height on the upper surface of the platen 1 and parallel to each other are fixed.
(B) The shape of the end portions 3 and 3 on both sides of the two guide rails 2 to be paired is such that the upper surfaces 4 and 4 are inclined so as to gradually descend toward the tip portions 5 and 5 of the guide rail 2, and eventually End by crossing the bottom surface 6 of the guide rail.
(C) Arms 8 and 8 that are supported at one end by fulcrums 7 and 7 each including a rotating shaft are provided at two points (four places in total) at a point in the middle of the pair of guide rails 2. .
(D) At one end of each arm 8, the lower surface 9, 9 at the end opposite to the side supported by the fulcrum 7, 7 is gradually inclined toward the tip portions 10, 10 of the arm 8, 8. Then, when it is going to rise and eventually crosses the upper surface 11, 11 of the arm, it ends with some suitable thickness left.
(E) Between the upper surface 4 of the pair of guide rails 2 and the lower surfaces 9 and 9 of the arms 8 and 8 which are also paired, both ends thereof, that is, the above (b) (d) Interrupters 12 and 12 are provided which slide from the inclined portion shown in FIG.
(F) Each of the interrupters 12 and 12 is provided with a female screw portion 13 at the center thereof, and a bolt 14 having a male screw penetrating therethrough corresponding to the female screw portion 13 is defined as an interrupter. Is provided in the vertical direction.
(G) A pair of interrupters 12, 12 positioned on both sides of the bolt 14 are pulled toward the center by rotation of the bolt, and the male screws to be cut by the bolt 14 In order to be able to be moved away from both ends, the screw is cut into left and right reverse screws at the middle.
(H) A screw guide 15 for preventing the bolt 14 itself from moving in the longitudinal direction and from moving to the left and right is provided at one end of the platen 1, and one end of the bolt 14 is passed through the screw guide 15.
(I) Bolt penetration holes 16 provided in the screw guide 15 have a width that allows the bolts 14 to penetrate sufficiently in the horizontal direction, and at least the height of the guide rail 2 to the bolt penetration width in the vertical direction. The inner width is the sum of the dimensions.
(N) At the bolt part through which the bolt 14 penetrates the screw guide 15, flange-shaped anti-skids 17 and 17 are fixed to the bolt 14 to prevent the bolt from moving in the longitudinal direction so as to sandwich the screw guide 15. Provide.
(L) A connection port 18 for attaching a handle such as a ratchet handle or a crank handle for rotating the bolt is provided at one end of the bolt.
(V) On the upper part of the arm 8, a levitation base 19 is provided in which the tip of the arm pointed up and down slides on the back surface, and accordingly the elevator itself also moves up and down.
(W) The levitation base 19 is provided with an arm guide 20 that guides the sliding of the arm 8 in the longitudinal direction of the lower surface thereof by welding or the like. In addition, both ends of the arm guide 20 have their lower surfaces cut off obliquely in the same manner as the arm so as not to disturb the interrupt entry of the interrupter 12.
(F) The auxiliary arm 21 for preventing the levitation base 19 from being separated from the main body or moving in the longitudinal direction of the levitation base 19 includes a part of the levitation base 19 such as the arm guide 20 and a part of the main body such as the arm 8. Provide between. An ultra-thin jack constructed as follows.
(A) On the upper surface of the platen 1, two guide rails 2, 2 each having a height of an appropriate thickness and being divided into two in the longitudinal direction are fixed in parallel.
(B) In the four guide rails 2 and 2 that form two pairs, the shape of the end portions 3 and 3 in the same direction is such that the respective upper surfaces 4 and 4 are gradually inclined and lowered. Eventually, it intersects with the bottom surfaces 6 and 6 of the guide rail 2 and ends in a shape where the tip portions 5 and 5 of the guide rails 2 and 2 are pointed.
(C) The two pairs of guide rails 2 and 2 are supported at one end of each of the non-pointed ends (a total of four locations) by fulcrums 7 and 7 that are rotation axes, all in the same direction. Are provided.
(D) On the lower surfaces 9 and 9 of the arms 8 and 8, one end which is not supported by the fulcrums 7 and 7 is gradually inclined upward toward the tip portions 10 and 10 of the arms. Then, when an attempt is made to cross the upper surface 11 or 11 of the arm, the process is finished with some suitable thickness.
(E) Between the upper surfaces 4 and 4 of the two pairs of guide rails 2 and 2 and the lower surfaces 9 and 9 of the arms 8 and 8 which are also two pairs, an arm is formed from one of the sharp ends. A pair of interrupters 12 and 12 are provided which slide in the direction of the fulcrum 7 and 7 with the guide rail and advance.
(F) Each of the interrupters 12 and 12 is provided with a female screw portion 13 at the center thereof, and a bolt 14 having a male screw penetrating therethrough corresponding to the female screw portion 13 is defined as an interrupter. Is provided in the vertical direction.
(G) The male screw to be cut by the bolt 14 is the right or left screw in the same direction for both interrupters 12 and 12.
(H) One end of the bolt 14 is provided at one end of the platen 1 and a screw guide 15 is provided for preventing the bolt itself from moving in the longitudinal direction and moving in the left-right direction.
(I) Bolt penetration holes 16 provided in the screw guide 15 have a width that allows the bolts 14 to penetrate sufficiently in the horizontal direction, and at least the height of the guide rail 2 to the bolt penetration width in the vertical direction. The inner width is the sum of the dimensions.
(N) At the part where the bolt 14 passes through the screw guide 15, the flange guides 17 and 17 are fixed to the bolt so as to sandwich the screw guide 15 and prevent the bolt from moving in the longitudinal direction. Provide.
(L) A connection port 18 for attaching a handle such as a ratchet handle or a crank handle for rotating the bolt is provided at one end of the bolt.
(V) On the arm 8, a levitation base 19 is provided on which the tip of the pointed arm moves up and down while sliding.
(W) The levitation base 19 is provided with an arm guide 20 for guiding the slide of the arm 8 in the longitudinal direction of the lower part.
(F) The auxiliary arm 21 for preventing the levitation base 19 from being separated from the main body or moving in the longitudinal direction of the levitation base 19 includes a part of the levitation base 19 such as the arm guide 20 and a part of the main body such as the arm 8. Provide between.

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