JPH0344151Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an opening-adjustable clamping tool applied to futon scissors.

(Prior art) Futon scissors are known as futon scissors, which have a pair of large holding pieces and a strong spring. , Utsuko No. 60-8869, No. 61-
A mechanism was developed to keep the opening constant, as in No. 30637.

However, as mentioned above, conventional devices that determine the degree of opening by tightening screws or meshing teeth require the cumbersome operation of turning the screw each time they are opened or closed, or the operation of temporarily disengaging the teeth. In addition, screws are easily lost or worn out, and there is a risk of rusting and staining futons and the like. The meshing structure of the teeth also requires a lot of man-hours to manufacture, and there is a risk of damage.

(Technical Problem) The present invention was developed in view of the above-mentioned points, and its purpose is to provide an easy-to-use opening that can regulate the opening degree by fixing the base end portions of which a pair of clamping pieces are pivotally supported by frictional force. An object of the present invention is to provide a degree-adjustable clamping tool.

(Technical Means) The purpose is to overlap the base ends of the pair of clamping pieces 1 and 2, to penetrate both base ends in a skewer-like manner, and to contact and
It is a clamping tool which is provided so as to be openable and closable in order to clamp an object at the tips of both clamping pieces 1 and 2 by connecting them with a pivot shaft 5 so that they can be separated, and the proximal end has a central part,
The shaft cylinders 21 and 22 are formed with a center hole that can penetrate and lock the pivot shaft 5, and the shaft cylinders 21 and 22 are used to accommodate the closing spring 16 that biases the pair of clamping pieces 1 and 2 in the closing direction. It consists of accommodating parts 17, 18 formed in a donut shape on the outer periphery of the accommodating parts 17, 18, and outer cylinders 3, 4 surrounding the outside of each accommodating part 17, 18, and the mutually facing end surfaces of the shaft cylinders 21, 22 in the center. While forming an inner frictional resistance means that can come into contact with and separate from the outer cylinders 3 and 4, outer frictional resistance means that can come into contact with and separate from each other are also provided on the mutually facing end surfaces of the outer cylinders 3 and 4. Groove-shaped pressure contact surfaces 7A, 7A are formed on the entire circumference of the end surface of 4, respectively, and a ring-shaped outer elastic piece 6A is provided that is located between both pressure contact surfaces 7A, 7A and presses in a direction to separate them. Furthermore, in order to bring both the inner and outer friction resistance means into a press-contact friction state, it is possible to achieve this by providing a cam 8 at the end of the pivot shaft 5 that presses one proximal end and the other proximal end against each other. can.

(Function) For example, when the lever 27 is in the state shown in FIG. 3, the clamping pieces 1 and 2 are not pressurized by the cam 8 and can freely open against the closing spring 16. Therefore, it is possible to clamp the area on which a futon or the like is hung between the clamping pieces 1 and 2 and use the closing spring 16, but when the clamping pieces 1 and 2 are clamped, the lever is reversed and In this state, the frictional resistance means 6 and 7 are pressed together by the cam 8 and exert the maximum frictional force, so that both the clamping pieces 1 and 2 maintain their opening degree.

In addition, in the case of the examples shown in FIGS. 5 and 6, when the lever 27 is operated to move the base end apart in the axial direction,
On the inside, the engagement of the rough surfaces consisting of the filament 6C and filament 7C provided on the circumferential surface of each shaft cylinder 21, 22 is in a non-pressure contact state, so one of the clamping pieces 1, 2 becomes free. , can be freely opened and closed around the axis, and when the angle is determined, when the lever 27 is operated in the opposite direction, the filament 6C and the filament 7C engage with each other on their rough surfaces, and the clamping pieces 1 and 2 The opening angle of is fixed constant. The effect of the outer elastic piece 6A is the same as described above.

Note that when the frictional resistance means 6 and 7 are exerting the maximum frictional force due to the cam 8, the elasticity far exceeds the elasticity of the closing spring 16.

(Embodiment) To explain below with reference to the drawings, each of the pair of clamping pieces 1 and 2 made of a resin molded product has a middle part curved outward in an arc shape, and the middle part is between the side walls 9 and 9. A width plate 10 is located outwardly near the proximal end, and the distal end 1
As it approaches 1 and 12, it moves inward,
At the tip portions 11 and 12, the clamping surfaces 13 and 14 remain as they are.
It is formed so that For this reason, the cross-sectional shape of the clamping pieces 1 and 2 changes from a U-shape to an inverted U-shape at the transition portion 15, making them strong against torsion.

The base end part is a part that is rotatably connected by a pivot shaft 5 that overlaps and passes through the base ends of the pair of clamping pieces 1 and 2, and has a generally double inner and outer cylindrical shape that is larger than the middle part. However, since they are stacked one on top of the other, their respective thicknesses are somewhat thin, and the interiors surrounded by the outer cylinders 3 and 4 are hollow, and serve as housing portions 17 and 18 for the closing springs 16. 1
9 and 20 are locking parts at the end of the closing spring, and each clamping piece 1,
It is formed in 2. Shaft cylinders 21 and 22 that fit into each other are formed at the inner center of both base ends, and both clamping pieces 1 and 2 are slightly moved by a separate pivot 5 that passes through the inside of both cylinders and is locked at the hole end. Detachably coupled.

The frictional resistance means 6 and 7 are provided concentrically in two layers, the inner and outer sides, and in the embodiment shown in FIGS. A ring-shaped elastic piece 6A provided in between, a pressure contact surface 7A provided in the shape of a groove on the end surfaces of the outer cylinders 3 and 4 so as to come into contact with and separate from the ring-shaped elastic piece 6A, and a pressing surface 7A provided in the axial direction on a part of the shaft cylinders 21 and 22. It has a ring-shaped inner elastic piece 6B and a ring-shaped inner pressure contact surface 7B that comes into contact with and separates from the ring-shaped inner elastic piece 6B. The outer elastic pieces 6A are fitted into recesses 23 and 24 formed on the inner surface of each base end.

Modifications of the frictional resistance means 6 and 7 are shown in FIGS. 5 and 6.
As shown in FIG. 7, a part of the inner portion that fits with the end of one shaft cylinder 21 and the end of the other shaft cylinder 22 forms a conical contact surface. The filament 6C and the filament 7C that engages with the filament 6C are formed generally along the axial direction, and have a rough surface consisting of minute linear irregularities. Therefore, the proximal end portion is biased in the separating direction by the outer elastic piece 6A, as in the previous example.

At the other end of the pivot 5, there is a support shaft 2 perpendicular to the axial direction of the pivot 5.
The cam 8 is equipped with a cam 8 rotatably mounted by a support shaft 25, and the cam 8 has a circumferential surface 26 whose radius from the spindle 25 changes continuously, and the circumferential surface 26 has a proximal end. By rotating in contact with the portion 3, the frictional resistance means 6 and 7 are pressurized and brought into pressure contact with each other, thereby increasing the resistance force. Reference numeral 27 indicates a lever for rotating the cam 8, and 28 indicates a cam protrusion.

(Effects) Since the present invention is constructed and operates as described above, the opening degree of the pair of clamping pieces 1 and 2 can be continuously and steplessly adjusted, and the opening degree can be fixed by frictional force at that opening degree. Since the magnitude of the force can be adjusted with a single touch using the cam 8, there is no need to change the meshing position of the teeth or loosen and retighten screws, making it extremely easy to operate. In particular, the device of the present invention is provided with double friction resistance means on the inside and outside, so that the pair of clamping pieces 1 and 2 can be very effectively pressed together by just the friction force.
can be fixed at any angle. In addition, since the outer elastic piece 6A always presses the proximal end outer cylinders 3 and 4 in the direction of separating them, when the pressure applied by the cam 8 is released, the proximal ends immediately separate outward in the axial direction, and one by one. There is no need for a releasing operation, and when the cam 8 applies pressure, its elastic force acts on the pressure contact surfaces 7A, 7A and exerts a frictional force.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an exploded perspective view, FIG. 2 is a front view, FIGS. 3 and 4 are sectional views of main parts for explaining the opening adjustment operation, and FIG. 5
The figure is a sectional view of a modified example, FIG. 6 is a sectional view of the same operating state, and FIG. 7 is a sectional view of a main part. 1, 2... holding piece, 3, 4... outer cylinder at the proximal end,
5... Pivot, 6, 7... Friction resistance means, 8... Cam, 16... Closing spring, 17, 18... Accommodating part,
21, 22... shaft cylinder.

Claims (1)

[Claims for Utility Model Registration] By overlapping the base ends of the pair of clamping pieces 1 and 2, penetrating both base ends in a skewer shape, and connecting them with a pivot 5 so as to be able to touch and separate, both clamping pieces can be held together. It is a clamping tool which is provided to be openable and closable in order to clamp an object at the tips of the pieces 1 and 2, and the base end has a shaft in the center that is formed with a central hole that can penetrate and lock the pivot shaft 5. accommodating portions 17, 18 formed in donut shapes on the outer periphery of the shaft tubes 21, 22 to accommodate the cylinders 21, 22 and the closing spring 16 that biases the pair of clamping pieces 1, 2 in the closing direction;
Outer cylinders 3 and 4 surrounding the outside of each housing section 17 and 18
Forms an inner frictional resistance means that can come into contact with and separate from the mutually facing end surfaces of the shaft cylinders 21 and 22 at the center, while also being able to contact and separate from the mutually facing end surfaces of the outer cylinders 3 and 4. As the outer friction resistance means, groove-shaped pressure contact surfaces 7A, 7A are respectively formed on the entire circumference of the end surfaces of the outer cylinders 3, 4, and groove-shaped pressure contact surfaces 7A, 7A are provided between the pressure contact surfaces 7A, 7A. A ring-shaped outer elastic piece 6A is provided which presses the inner and outer friction resistance means in a direction to separate them, and a cam 8 which presses one proximal end and the other proximal end to each other in order to bring both the inner and outer friction resistance means into pressure contact is provided. An opening-adjustable clamping tool is provided at the end of the pivot shaft 5.