JP4673606B2 - Clamping device - Google Patents

Description

  The present invention relates to a clamp device for attaching optional parts such as a desk shelf and a desk lamp on a top plate of a desk (including a desk and a table).

Conventionally, in order to attach a desk shelf, a desk lamp, a telephone stand, and other optional parts on a desk top plate, a clamp device that clamps the top plate is used (for example, see Patent Document 1). This clamping device is formed by screwing a fastening member having a screw shaft portion into a U-shaped clamp body in a side view, sandwiching the top plate between the fastening member and the clamp body, and forming at the upper end of the fastening member A desk lamp or the like is inserted into the hole.
JP 2002-161907 A

  However, the clamping device as described above is provided with an outer cylinder that covers the rotating operation part located above the clamp body and the screw part of the fastening member is exposed to the outside when the fastening member is fastened. In addition, many parts such as a ring member and a pressing piece are required, the structure is complicated and the cost is high, and a desk lamp or the like is formed in a hole formed in the rotation operation portion at the upper end of the tightening member. Because the optional operation member is inserted, the frictional resistance of the optional member applied to the hole makes the rotation operation part heavy and difficult to rotate, and the rotation operation part is greatly exposed upward, so that it looks good. There are problems such as not.

  The present invention has been made in view of the above-described problems of the prior art, and has an object to provide a clamp device that has a simple structure, a small number of parts, an easy rotation operation of a tightening screw, and a good appearance. Yes.

According to the present invention, the above problem is solved as follows.
(1) A clamp member having a U-shaped side view, in which an upper piece and a lower piece facing in the horizontal direction are connected by a vertical piece, is fitted to the end of the top plate, and a sleeve facing upward is projected from the upper piece. The screw portion of the tightening screw that faces in the vertical direction is screwed into the screw hole that faces in the vertical direction provided in the upper piece, and the rotary knob provided in the lower end of the screw portion is loosely fitted in the sleeve. , Located below the upper piece, sandwiching the top plate between the rotary knob and the lower piece, and having a front leg rod and a rear leg rod connected to the front leg rod The back plate of the toe is loosely fitted to the upper portion of the sleeve, and is placed on the upper end of the threaded portion, and the front leg of the toe is placed on the top plate, thereby the top plate The bottom end of the front leg rod should not float from the top surface of the top plate even if the thickness of the top plate changes.

(2) In the above item (1), a tool engaging means capable of rotating the tightening screw by engaging the operating tool is provided at the upper end of the screw portion of the tightening screw.

(3) In the above item (1) or (2), a resin protective material is provided on the lower end surface of the rotary knob of the tightening screw.

(4) In any one of the above items (1) to (3), a resin end cap that contacts the upper end surface of the screw portion of the fastening screw is attached to the lower end of the saddle member.

(5) In any one of the above items (1) to (4), a leg rod that supports a desk shelf mounted on a top plate of a desk is used as a hook material placed on the upper end of the screw portion.

According to the present invention, the following effects can be achieved.
(a) According to the invention described in claim 1, since it can be configured simply with a U-shaped clamp member, a sleeve and a fastening screw in side view, and the saddle material is placed on the upper end of the thread portion, Since the contact area of the brazing material with the tightening screw is small and the frictional resistance is small, it is easy to rotate the rotary knob, and the rotary knob is located under the upper piece of the clamp member, so a cover is provided. It looks good without it.

(b) According to the invention of claim 2, the tightening screw is operated by engaging the tool with the tool engaging means at the upper end of the tightening screw in a state where the saddle member is removed from the sleeve, and rotating the tool. Can be tightened or loosened from above, and the operability is good. That is, since the rotation operation of the tightening screw can be performed with either the rotary knob or the tool, it is easy to use.

(c) According to the invention described in claim 3, the resin protective material provided on the lower end surface of the rotary knob of the tightening screw can prevent the top plate surface from being scratched, and can be slipped during rotation operation. The rotation operation can be performed easily.

(d) According to the invention of claim 4, the resin end cap provided at the lower end of the saddle material reduces the frictional resistance between the saddle material and the tightening screw, and the rotation operation can be performed easily.

(e) According to the invention described in claim 5, it is possible to simplify the desktop shelf apparatus by using the rod material placed on the upper end of the screw portion as a leg rod supporting the desktop shelf mounted on the top plate of the desk. It can be attached to the top board.

Hereinafter, an example in which a clamp device according to an embodiment of the present invention is applied to a desktop shelf device will be described with reference to the drawings.
FIG. 1 is a perspective view when a desktop shelf apparatus equipped with an embodiment of the present invention is mounted on a desk, FIG. 2 is a partially cutaway side view of the desktop shelf apparatus, and FIG. 3 is an enlarged vertical section of the clamp apparatus. It is a side view.

  The desk (1) is provided with a top plate (3) on the upper part of the leg portion (2). The back of the top plate (3) (the front side in FIG. 1 and the right side in FIG. A desktop shelf device (4) is attached to the rear side. The desktop shelf device (4) includes a shelf board (5), a pair of left and right leg rods (6) and (6) that support the shelf board (5), and the leg rods (6) and (6). And clamping mechanisms (7) and (7) for fixing to the plate.

  The leg rod (6) includes a front leg rod (6a) located at the front of the shelf board (5), a rear leg rod (6b) located at the rear, a front leg rod (6a) and a rear leg rod. It comprises an upper connecting rod (6c) that connects the upper ends of (6b), and a clamp mechanism (7) to be described later is provided at the lower end of the rear leg rod (6b).

  The upper connecting rod (6c) includes a front and rear connecting rod (6c1) extending rearward from the upper end of the front leg rod (6a), and a rear end portion of the front and rear connecting rod (6c1) and an upper end of the rear leg rod (6b). It is substantially L-shaped, consisting of left and right connecting rods (6c2) connecting the two.

On the horizontal support rod (6c), a shelf board (5) is placed and fixed.
That is, as shown in FIG. 2, an upward U-shaped reinforcing rod (8) is fixed to the back surface of the shelf (5), and the reinforcing rod (8) is connected to the front and rear connecting rods (6c1) and the left and right sides. The front and rear connecting rods (6c1), the left and right connecting rods (6c2) and the reinforcing rod (8) are connected to the connecting rod (6c2) by a nut (10) welded to the countersunk screw (9) and the reinforcing rod (8). Is fixed.

  As shown in FIG. 3, the clamp device (7) is screwed into the clamp member (11) and a clamp member (11) that is U-shaped in side view and is fitted to the rear end of the top plate (3). And a fastening screw (12) and a sleeve (13) erected vertically to the clamp member (11). The clamp member (11) is U-shaped in a side view in which an upper piece (11a) and a lower piece (11b) facing in the horizontal direction are connected by a vertical piece (11c). The sleeve (13) is fixed to the upper piece (11a) of the clamp member (11). The tightening screw (12) is screwed into a screw hole (11d) facing the vertical direction provided on the upper piece (11a) of the clamp member (11) and is loosely fitted into the sleeve (13). (12a) and a rotary knob (12b) integrally provided at the lower end of the screw portion (12a). The rotary knob (12b) is always in contact with the upper surface of the top plate (3). A lower end portion of the rear leg rod (6b) is loosely fitted to the sleeve (13), and a resin end cap (14) attached to the lower end is in contact with the upper end of the screw portion (12a).

FIG. 4 is a perspective view showing the operation of the clamp mechanism.
As shown in the figure, the clamping mechanism (7) is tightened and loosened by putting a hand under the shelf (5) from the front of the desk (1) and rotating the rotary knob (12b) with a finger. It can be performed. When the rotary knob (12b) is rotated clockwise, the clamp member (11) rises along the threaded portion (12a), and the lower surface of the rotary knob (12b) and the lower piece (11b) of the clamp member (11) A top plate (3) is sandwiched between the pad (15) provided on the upper surface of the plate. Further, when the rotary knob (12b) is rotated counterclockwise, the clamp member (11) is lowered and the clamping is loosened.

  When the clamp member (11) moves up and down due to the rotation of the rotary knob (12b), the sleeve (13) also moves up and down, but the rear leg rod (6b) moves up and down while resting on the screw part (12a). There is no. Therefore, even when the top plate (3) is thin as shown by the chain line (3A) in FIG. 2, the clamping member (11) is raised to the position of the chain line (11A) by the tightening operation, but the leg rod (6) In addition, the clamping mechanism (7) can be clamped and loosened without the shelf board (5) moving up and down.

A square hole (16), which is a tool engaging means, is formed on the upper end surface of the thread portion (12a). Therefore, instead of turning the rotary knob (12b), before attaching the foot rod (6), insert a tool such as a wrench into the square hole (16) and turn the tightening screw (12). A strong clamping force can be applied to 3). In this way, since two ways of tightening are possible, one of them can be selected according to the situation.
The tool engaging means is not limited to the square hole (16), and can be, for example, a slit, a hexagonal head, or the like.

  As shown in FIG. 3, a knurling process (17) is performed on the outer periphery of the rotary knob (12b), thereby facilitating the rotation operation. Further, by providing the resin protective material (18) on the lower surface of the rotary knob (12b), it is possible to prevent the surface of the top plate (3) from being damaged. The resin protective material (18) and the above-mentioned resin end cap (14) reduce the frictional resistance against the fastening screw (12), so that the rotary knob (12b) can be rotated easily. .

  In the said embodiment, although the example which uses a clamp apparatus (7) for attachment of a desktop shelf apparatus (4) was shown, it is not limited to this, For example, a desk lamp, a telephone stand, and other optional parts of glazing It can also be applied when attaching to a table top or the like.

  As described above, the clamp device (7) of the present invention can be easily configured by the clamp member (11), the sleeve (13), and the tightening screw (12), and the screw portion (12a) of the tightening screw (12). ) Is placed on the top of the rear leg rod (saddle) (6b), so the contact area of the saddle member (6b) with the fastening screw (12) is small and the frictional resistance is small, 12b) is easy to rotate, and the rotary knob (12b) is located below the upper piece (11a) of the clamp member (11).

It is a perspective view at the time of mounting | wearing a desk with the desktop shelf apparatus provided with one Embodiment of this invention. Similarly, it is a partially cutaway side view. Similarly, it is a vertical side view of the main part. Similarly, it is a perspective view which shows the operation state of rotary knob.

Explanation of symbols

(1) Desk
(2) Leg
(3) Top plate
(4) Desktop shelf device
(5) Shelf board
(6) Footpad
(6a) Front heel
(6b) Rear footpad
(6c) Upper connection rod
(6c1) Left and right connecting rod
(6c2) Front and rear connection rod
(7) Clamp mechanism
(8) Reinforcing rod
(9) Countersunk screw
(10) Nut
(11) Clamp member
(11a) Upper piece
(11b) Lower piece
(11c) Vertical piece
(11d) Screw hole
(12) Tightening screw
(12a) Screw part
(12b) Rotating knob
(13) Sleeve
(14) End cap
(15) Pad
(16) Square hole (tool engagement means)
(17) Knurling
(18) Resin protective material

Claims (5)

A clamp member with a U-shape in side view, in which the upper and lower pieces facing the horizontal direction are connected by a vertical piece, is fitted to the end of the top plate. The screw portion of the tightening screw facing the screw is screwed into the screw hole facing the vertical direction provided on the upper piece, and the rotary knob provided on the lower end of the screw portion is loosely fitted on the sleeve. A leg rod having a front leg rod and a rear leg rod connected to the front leg rod , positioned below the piece, sandwiching the top plate between the rotary knob and the lower piece ; A thickness of the top plate is obtained by loosely fitting a rear leg rod on the upper portion of the sleeve and placing the rear leg rod on the upper end of the screw portion and placing the front leg rod of the leg rod on the top plate. A clamping device characterized in that the lower end of the front leg rod does not float from the upper surface of the top plate even if the angle fluctuates .   2. The clamping device according to claim 1, wherein a tool engaging means capable of rotating the tightening screw by engaging an operating tool is formed at an upper end portion of the screw portion of the tightening screw.   The clamping device according to claim 1 or 2, wherein a resin protective material is provided on a lower end surface of the rotary knob of the tightening screw.   The clamp apparatus according to any one of claims 1 to 3, wherein a resin end cap that abuts on an upper end surface of a screw portion of the tightening screw is attached to a lower end of the saddle member. The clamp device according to any one of claims 1 to 4, wherein a leg rod supporting a desktop shelf mounted on a top plate of the desk is used as a saddle member placed on an upper end of a screw portion.

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