JP3175910U - Leg - Google Patents

Abstract

[PROBLEMS] To provide a leg body capable of preventing finger padding between a lower end of a main leg and a base end portion of the telescopic leg when the telescopic leg is contracted, so that the leg body can be safely expanded and contracted. .
A main leg 2, an extendable leg 3 inserted into the main leg 2 so as to be extendable and retractable, and a lock means for locking the extendable leg 3 at a position where the extendable length of the extendable leg 3 is extended to the main leg 2. In the leg body, when the telescopic leg 3 is maximally contracted with respect to the main leg 2 in order to prevent the operator's fingers from being clogged between the lower end of the main leg 2 and the base end part of the telescopic leg 3, the telescopic leg 3 The contact part T provided at the upper end part contacts the stopper part S provided inside the main leg 2, so that it is necessary for preventing the above-mentioned finger padding between the lower end of the main leg 2 and the base end part of the telescopic leg 3. An interval η is provided.
[Selection] Figure 5

Description

  The present invention relates to an extendable leg used for a work table, a stepladder or the like.

  Specific publicly known documents such as patent gazettes cannot be cited as conventional leg bodies of this type, but conventionally used leg bodies are a main leg and an extension / contraction that is telescopically inserted into the main leg. It consists of a leg and a locking means that locks the telescopic leg at a position where the required length of the main leg is extended and retracted.The telescopic leg is slidable with respect to the main leg with the locking means unlocked. The telescopic leg is locked and used at the position where the required length is expanded and contracted.

  The conventional leg has a structure in which the lower end of the main leg abuts on the base end of the telescopic leg when the telescopic leg is contracted to the maximum contracted position. When the operator unlocks the locking means with his hand attached to the lower end of the main leg when stowing in the leg, the main leg slides and falls along the telescopic leg under its own weight, and the lower end of the main leg The operator's fingers may be caught between the base ends of the telescopic legs, which is very dangerous.

  In view of the circumstances described above, the present invention prevents leg clogging between the lower end of the main leg and the base end of the telescopic leg when the telescopic leg contracts, and allows the leg body to perform the telescopic work safely. The purpose is to provide.

  Means for solving the above-described problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 includes a main leg 2 and a telescopic leg that is telescopically inserted into the main leg 2. 3 and a locking means for locking the telescopic leg 3 at a position where the main leg 2 is extended or contracted by a required length, work between the lower end of the main leg 2 and the base end of the telescopic leg 3 When the telescopic leg 3 contracts to the main leg 2 as much as possible to prevent the person's fingers from being stuffed, the contact part T provided at the upper end of the telescopic leg 3 contacts the stopper part S provided inside the main leg 2. It is characterized in that the gap η necessary for preventing the finger padding is provided between the lower end of the main leg 2 and the base end portion of the telescopic leg 3 by contact.

  A second aspect of the present invention is the leg body according to the first aspect, wherein an extensible leg cap 11 is attached to the upper end portion of the extensible leg 3 made of a cylindrical material, and the upper end side of the cap 11 is used as the abutting portion T. The lower end side of the fitting portion 19 fitted and fixed at a required position inside the main leg 2 made of a material is the stopper portion S.

  The effect of the invention by the above solution will be described with reference numerals of embodiments described later. According to the invention according to claim 1, between the lower end of the main leg 2 and the base end of the telescopic leg 3. In order to prevent the operator's fingers from being stuffed, the contact portion T at the upper end of the telescopic leg 3 contacts the stopper S inside the main leg 2 when the telescopic leg 3 contracts to the main leg 2 to the maximum extent. Since the gap η necessary for preventing finger filling is provided between the lower end of the main leg 2 and the base end portion of the telescopic leg 3, the operator puts his hand on the lower end of the main leg 2 When the locking means is unlocked, the main leg side slides and falls along the telescopic leg under its own weight, so that the telescopic leg 3 side abuts even if the telescopic leg 3 is contracted to the main leg 2 as much as possible. Finger contact prevention between the lower end of the main leg 2 and the base end part of the telescopic leg 3 by the part T contacting the stopper part S on the main leg 2 side The interval η of forming can be prevented from being sandwiched user's finger.

  According to the second aspect of the present invention, even if the main leg 2 and the telescopic leg 3 are each made of a cylindrical material such as an aluminum extruded shape, the contact portion T at the upper end of the telescopic leg 3 is used as the main leg. 2. It can contact the stopper part S in the inside reliably, and even if the contact part T frequently contacts the stopper part S, the contact part T and the stopper part S are not easily damaged and can be used safely for a long time. It becomes possible.

1 shows an embodiment of the present invention, in which (a) is a front view of a work table and (b) is a side view. (a) is an enlarged front view showing the main leg, and (b) is a side view of the upper end portion of the main leg. (a) is an enlarged front view showing a telescopic leg, and (b) is a cross-sectional view taken along line AA of (a). 3 (a) is an enlarged view of the part indicated by arrow B, (b) is a plan view, (c) is a side view, and (d) is a state in which an extensible leg cap is attached to the upper end of the extensible leg. It is a perspective view shown. It is a partial cross-section enlarged front view of a state where the telescopic legs are maximally contracted with respect to the main leg. Similarly, it is an enlarged side view of a state in which the telescopic legs are maximally contracted with respect to the main leg.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a work table provided with legs according to the present invention, and this work table is a ceiling on which an operator works. Among the four main legs 2... Arranged at the four corners on the lower surface side of the plate 1 and the top plate 1, the two main legs 2, 2 facing left and right at the end of each wife side of the top plate 1 are intermediate. A pair of front and rear main legs 6, 6 formed by connecting the upper and lower jumper members 4, 5 and both of the main legs 2, 2 are inserted into the main legs 2, 2 so as to be extendable and contractible. It is composed of a pair of front and rear extendable legs 8, 8 formed by connecting the lower ends of the extendable legs 3, 3 with a filler material 7. A caster 20 is attached to the lower end of the telescopic leg 3 of each telescopic leg 8. 1 (a) and 1 (b), the state where the telescopic leg 3 of the telescopic leg 8 is maximally contracted with respect to the main leg 2 of the main leg 6 is shown by a solid line, and the state where the telescopic leg 3 is extended. It is indicated by a virtual line.

  As shown in FIG. 1 and FIG. 2, brackets 21, 21 fixed to both end portions on the side of each wife on the bottom surface of the top plate 1 are provided at the upper ends of the left and right main legs 2, 2 forming each main leg 6. 1, and the leg rotation shaft member 22 is rotatably mounted on the brackets 21, 21. Therefore, each main leg member 6 is centered on the leg rotation shaft member 22, as shown in FIG. It is possible to rotate between an open leg position as shown in FIG. 1 and a closed leg position that is folded so as to follow the lower surface of the top plate 1 although not shown. A bendable stay 23 is interposed between the top plate 1 and the intermediate part side material 4a.

  As shown in FIGS. 3 (a) and 3 (b), the left and right telescopic legs 3 and 3 of the telescopic leg body 8 are provided with locking portions 9, 9, 10, and 10 at positions facing left and right. As shown in FIG. 2, the leg body 6 has long grips extending from the center side toward the both end portions along the lower surface side of the lower side tabular material 4 b, and a grip portion for unlocking operation at each one end facing the center side. A pair of lock shafts 13 and 13 forming 12 and 12 are mounted so as to be slidable in the horizontal direction. Normally, the other end portions of the lock shafts 13 and 13 are connected to both telescopic legs by the urging force of the springs 14 and 14, respectively. 3 and 3 to lock the telescopic legs 3 and 3 at the required telescopic positions, respectively, and when unlocking, the lock shafts 13 and 13 shown in FIG. Grip the gripping parts 12 and 12 against the springs 14 and 14 and pull them toward each other. It is adapted to unlock by pulling apart the 3,13 outer end portion from the locking portion 9,9,10,10 both telescopic legs 3,3. The locking portions 9 and 10, the lock shaft 13, and the spring 14 of the telescopic leg 3 constitute a lock unit that locks the telescopic leg 3 at a position where the main leg 2 is expanded and contracted by a required length.

  Although not shown, the left and right main legs 2 of the main leg body 6 are made of extruded aluminum in the shape of a rectangular tube, and the left and right sides of the telescopic legs 8 are placed in the main leg 2 made of this rectangular tube-shaped material. The telescopic legs 3 are slidably inserted. As shown in FIG. 4 (d), each of the telescopic legs 3 is made of a rectangular tubular aluminum extruded member in which a concave groove 15 is provided over the entire length of one side surface. Further, locking portions 9 and 10 as schematically shown in FIGS. 3 (a) and 3 (b) are provided. Further, as shown in FIGS. 3 (a) and 3 (b), in order to connect the end portion of the jumper material 7 to the base end portions of the left and right extensible legs 4 and 4 forming each extensible leg body 8, respectively. The rectangular tubular joint fitting 16 is fixed by a rivet in a state of being fitted on the base end portion of the telescopic leg 3.

  Thus, in order to prevent the operator's fingers from being stuffed between the lower end of the main leg 2 and the base end portion (joint fitting 16) of the telescopic leg 3, it is shown in FIGS. 1 (a) and 1 (b). As described above, when the telescopic leg 3 is contracted to the main leg 2 to the maximum extent, the contact part T provided at the upper end of the telescopic leg 3 comes into contact with the stopper part S provided inside the main leg 2 so that the main leg 2 An interval η necessary to prevent finger filling is provided between the lower end of the telescopic leg and the base end of the telescopic leg 3. The interval η necessary for preventing finger filling is about 20 to 30 mm.

  As shown in FIG. 4, as an example of the abutting portion T that abuts against the stopper portion S in the main leg 2 when the extensible leg 3 is contracted to the maximum extent with respect to the main leg 2 as described above, The upper end surface 11o of the telescopic leg cap 11 is attached to the upper end of the telescopic leg 3 made of an aluminum extruded shape. Moreover, as the stopper part S provided in the main leg 2, as shown in FIG.5 and FIG.6, in the bracket 21 which pivotally supports the leg rotating shaft member 22, the end of the said leg rotating shaft member 22 is provided. And a fitting portion 19 which is a lower end portion 19 of a connecting member 18 made of an extruded aluminum member that integrally connects the upper end portion of the main leg 2 and the upper end portion of the square cylindrical main leg 2. The lower surface 19o.

  The mounting structure of the telescopic leg cap 11 will be described with reference to FIGS. 4A to 4D. The telescopic leg cap 11 is made of a metal having a shape similar to the cross-sectional shape of the telescopic leg 3. As shown in FIGS. 4A to 4C, the upper half portion 11a of the cap has an outer diameter that is slightly larger than the outer diameter of the square cylindrical telescopic leg 3 over the entire circumference. And the cap lower half 11b has an outer diameter slightly smaller than an inner diameter over the entire circumference of the rectangular tube expansion / contraction leg 3. It is formed small. Therefore, when attaching the cap 11, as shown in FIG. 4 (d), the cap lower half 11b is fitted into the upper end of the telescopic leg 3, and the cap upper half 11a and the cap lower half 11b As shown in FIGS. 4A and 4C, the boundary step portion 11c is engaged with the upper end surface 3o of the telescopic leg 3 from the concave groove 15 of the telescopic leg 3 to the lower cap half 11b. The cap 11 is fixed to the telescopic legs 3 by driving in the rivets 24. The telescopic leg cap 11 is a hollow cap having a lower end opened, and an air circulation hole 25 is provided on the upper end surface 11o side.

  Further, the stopper portion S on the main leg 2 side uses a connecting member 18 made of an extruded aluminum member that integrally connects the main leg 2 of the main leg 6 to the leg rotating shaft member 22. As shown in FIGS. 5 and 6, the connecting member 18 is made of a member obtained by cutting the aluminum extruded shape member by a predetermined length in the extrusion direction. The main leg 2 is attached to the main leg 2 by being fitted into the upper end of the main leg 2 made of extruded aluminum and fixed with a rivet 26. 5 and 6, reference numeral 28 denotes a rotating shaft cover member attached to the end surface of the leg rotating shaft member 22 with a screw 29.

  In the work table as described above, in FIGS. 1 (a) and 1 (b), a solid line shows the state in which the telescopic leg 3 of the telescopic leg 8 is maximally contracted with respect to the main leg 2 of the main leg 6. As shown, in use, the telescopic leg 8 is properly extended from the state shown by the solid line in FIG. 5 while the gripping portions 12 and 12 of the lock shafts 13 and 13 are pulled together to release the lock, and then gripped. If the hands 12 and 12 are released, the telescopic leg 8 is locked to the required leg length, so that the work table can be used with the leg length.

  And, after using the work table, the retractable leg 3 is contracted while pulling the gripping parts 12 and 12 together with one hand to release the lock in order to return the extendable leg 3 of the extendable leg 8 to the original leg length. When the other hand is attached to the lower end of the main leg 2, the main leg 2 side slides down along the extensible leg 3 of the extensible leg 8 by its own weight, and the extensible leg 3 is the main leg. Even when the leg 2 is contracted to the maximum extent, as shown in FIGS. 1, 5, and 6, the contact portion T of the upper end portion of the telescopic leg 3 contacts the stopper portion S provided inside the main leg 2. By contacting, an interval η necessary for preventing finger filling is formed between the lower end 2a of the main leg 2 and the upper end 16a of the joint fitting 16 that is the base end portion of the telescopic leg 3. It is possible to prevent fingers from being pinched. Since the interval η is sufficiently wide as about 20 to 30 mm, it is possible to effectively prevent finger filling.

  Further, as shown in FIGS. 5 and 6, an extensible leg cap 11 is attached to the upper end portion of the extensible leg 3 made of a rectangular tube-shaped aluminum extruded shape member, and the upper end surface 11 o of the cap 11 is used as a contact portion T. The stopper portion S provided inside the main leg 2 is an aluminum connecting the end of the leg rotating shaft 22 and the upper end of the main leg 2 in the bracket 21 that pivotally supports the leg rotating shaft 22. Since the lower end portion 19 of the connecting member 18 made of an extruded shape member is the lower surface 19o of the fitting portion 19 fitted and fixed in the upper end portion of the main leg 2, the main leg 2 and the extensible leg 3 are respectively cylindrical materials. Even if the contact portion T is made of, the contact portion T at the upper end portion of the telescopic leg 3 can be reliably contacted with the stopper portion S inside the main leg 2 and the contact portion T is frequently contacted with the stopper portion S. The contact part T and stopper part S are not easily damaged and can be used for a long time. A.

  In this embodiment, the expansion / contraction leg cap 11 is formed in a shape similar to the cross-sectional shape of the expansion / contraction leg 3, and the cap upper half 11 a has an outer diameter over the entire circumference of the square tube expansion / contraction leg 3. The outer diameter over the entire circumference of the rectangular tube-shaped telescopic leg 3 is slightly smaller than the outer diameter over the entire circumference and slightly larger than the inner diameter over the entire circumference of the rectangular tube-shaped telescopic leg 3. A structure in which the cap lower half 11b is fitted and fixed in the upper end of the telescopic leg 3 with the cap upper half 11a protruding from the upper end of the telescopic leg 3 so as to be slightly smaller than the inner diameter. Therefore, when the telescopic leg 3 slides in the main leg 2, the outer peripheral surface of the cap 11 does not hit the inner peripheral surface of the main leg 2, and therefore, the sliding operation of the telescopic leg 3 is hindered. Smooth slide operation without coming Nawa to it can, moreover mounted telescopic leg cap 11 against the upper end of the telescopic leg 3 is simplified easily.

  Further, in this embodiment, the stopper portion S uses a connecting member 18 made of an extruded aluminum member that integrally connects the main leg 2 of the main leg 6 to the leg rotating shaft member 22, and this connecting member 18. Since the lower end portion 19 is fitted and fixed in the upper end portion of the main leg 2 made of a rectangular tubular aluminum extruded shape, there is no need to newly provide a special member, and the manufacture is easy. Cost can be reduced. In addition, the stopper part S can also be provided not only in the upper end part in the main leg 2 like this embodiment but in the upper-lower intermediate required part in the main leg 2.

  Moreover, although the above-mentioned embodiment demonstrated the leg body of the work bench | platform, the leg body which concerns on this invention is applicable also to the main leg and telescopic leg of a stepladder or a ladder other than a work bench | platform. In the above-described embodiment, the locking means for the telescopic legs 3 in the work table is configured by the locking portions 9 and 10 of the telescopic legs 3, the lock shaft 13, and the springs 14. However, the locking means according to the present invention can be expanded and contracted. Any configuration may be used as long as the leg is locked at a position where the leg is extended or contracted by a required length.

DESCRIPTION OF SYMBOLS 1 Top plate 2 of work bench Main leg 3 Telescopic leg 6 Main leg body 8 Telescopic leg body T Stretching leg side contact part S Main leg side stopper part 11 Telescopic leg cap 19 Fitting part

Claims (2)

  A leg body comprising a main leg, an extendable leg that is telescopically inserted into the main leg, and a locking means that locks the extendable leg in a position where the required length of the main leg is extended and contracted, and a lower end of the main leg. In order to prevent the operator's fingers from being clogged with the base end of the telescopic leg, the contact part provided at the upper end of the telescopic leg is located inside the main leg when the telescopic leg is fully contracted with respect to the main leg. A leg body configured to provide a gap necessary for preventing the finger filling between a lower end of a main leg and a base end part of an extendable leg by abutting against a provided stopper part.   A telescopic leg cap is attached to the upper end of the telescopic leg made of a cylindrical material, and the upper end side of the cap is used as the abutting part, and the fitting part is fitted and fixed to the required position inside the main leg made of the cylindrical material. The leg according to claim 1, wherein the lower end side is used as the stopper portion.

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