JPS6334307A - Stepless clamp apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention engages a pin of a chain bent in a stepwise manner with a guide rail inserted between the pins, and utilizes the frictional force generated between the two. The present invention relates to a stage clamp device.

(Prior art) A chain (A) is bent in a step-like manner as shown in FIG. Fix the core metal (b)
When pulled toward the other end, the pin (C), which is the node of the chain (A), moves following the core metal (rl), so the pin (C) sinks into the core metal (0) and causes a large amount of friction. generate force. (Patent Application No. 59-51770).

By the way, the clamping device has a chain (a) and a core metal (
The core metal (a) is limited in thickness to be inserted between the pin (c) and link (d) of the bent chain (a), and the compressive load is applied to the core metal (o). When this occurs, a buckling phenomenon occurs. Therefore, it is not possible to lengthen the core metal (llI), and the presence of the core metal (a) may become a mechanical obstacle.

(Objective of the present invention) As described above, since the conventional clamp device inserts the core metal into the center of the bent chain, it is limited by the thickness of the core metal, and it is difficult to apply a compressive load to the long core metal. Therefore, the present invention is a device developed with the aim of solving this problem.

(Configuration of the present invention) In order to solve the above problems, the clamp device according to the present invention is configured with the following features.

(1) It has a chain that bends at a constant pitch, and both ends of the chain, which are the centers of the points, protrude greatly from the inner and outer links. Therefore, the distance between the links on both sides may be small, or the chain may be configured with only links attached to the middle of the pins.

(2) Guide rails are attached to both sides of the chain, and the outer peripheral surfaces of the pins of the chain bent in a stepwise manner are engaged with the guide rails in between.

(3) One end of the chain is fixed, and the chain is constantly stretched using the spring force of a spring or wire, so each pin is always in contact with the guide rail surface.

Of course, if you want to clamp in both directions, you can use a relatively long chain and fix it at the center.
As described above, the basic idea of the present invention is to secure the pins protruding on both sides of the chain and the guide rail, and in actual use, the form of the chain and guide rail, the fixing position of the chain, etc. will vary depending on the application. It can be embodied as appropriate.

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

(Embodiment) FIGS. 1 to 3 show embodiments of a clamp device according to the present invention, in which 1 represents a chain and 2 represents a guide rail.

As shown in the figure, the chain 1 is bent in a stepwise manner, and a guide rail 2 is inserted between the bent chains. Here, the chain 1 is composed of an outer link 3, an inner link 4, a pin 5, a spacer 6, and a roller 7. The pin 5 largely protrudes from the outer link 3 to both sides, and the roller 7 is attached to the protruding part. It is worn. The roller 7 does not need to be rotatably attached to the pin 5, but only needs to be fixed, and is not necessarily required.

That is, if the guide rail 1 is made thicker by the thickness of the roller 7, exactly the same result will be obtained. Furthermore, is the point A at one end of the chain L a guide rail? Moreover, a wire 8 is bent and wound around each pin 5, and the wire 8 acts to constantly extend the chain 1 in the longitudinal direction. Therefore, the outer peripheral surface of the roller 7 is always in contact with the guide rail 2, and when the guide rail 2 is pulled in the direction of the arrow, the roller 7 is in contact with the guide rail 2.
It acts to further dig into and clamp. To release the clamp, the slider 9 must be moved in the opposite direction to the arrow to compress the chain 1, thereby creating a gap between the roller 7 and the guide rail 2. By the way, in implementing the device, There are few cases in which one end A of the chain 1 is fixed and the guide rail is moved.In many cases, the chain l is moved to the guide rail 2 which is used as an Alk structure frame. Figures 4 to 6 show examples of this, in which the chain 1 is stored in the case 1.
0, the fixed end A of the chain 1 is provided in the case 10, the other end B is in a free state, and the entire chain 1 can be compressed by a slider 9 to which a knob 11 is attached. In addition, the chain used in the embodiment shown in the same figure does not have the roller 7 attached to the protrusion of the pin 5.
The outer peripheral surface of the pin is in direct contact with the guide rail, and the guide rail 2 is often used as a frame for a single-stage structure. A C-shaped frame is adopted, and the case 1O can freely slide along the guide rail 2 and can be fixed at any position.

Figure 7 shows only the chain l used in the device, but if a relatively weak clamping force is sufficient, a link may be connected only to the middle of the pin 5 as shown in the figure. But it's quite a bit disturbing.

By the way, as an application example of the clamping device, for example, by connecting one end of a moving object to the case 10 shown in FIGS. 4 to 6, the moving object can be clamped at an appropriate place and fixed in its first position. Therefore, it is ideal for moving windows up and down, moving pedestals up and down, etc.

Although the above embodiments are only clamps in one direction, it goes without saying that clamping in both directions is possible by arranging the chains in pairs, which is not included in the present invention. obtain.

Therefore, the clamping device has the guide rail engaged with the pin of the chain bent in a stepwise manner, and the following effects can be obtained.

(Effects) (1) Since the guide rails that engage with the pins of the chain are arranged on both sides of the chain, the cross section of the guide rails can be made large, and there is no buckling phenomenon due to the action of compressive loads. It is possible to increase the sliding distance by lengthening the guide rail.

(2) A general structural frame such as a C-shaped frame can be used as the guide rail, and a special core bar as a clamping device is not required, and the chain shown in Figures 4 to 6 can be stored in the case. It can also be standardized as a type of mechanical element with a clamping function.

(3) Since the guide rails are placed on both sides of the chain, the contact area with the pins can be further increased, so the clamping force is further improved.

[Brief explanation of the drawing]

tjS1 to 3 show an embodiment of the clamp device according to the present invention, in which FIG. 1 is a plan view, FIG. 2 is a vertical sectional view, FIG. 3 is a horizontal sectional view, and FIGS. 4 to 6 4 shows a more specific example in which the chain is housed in a case, FIG. 4 is a longitudinal cross-sectional view, FIG. 5 is a plan view, FIG. 6 is a cross-sectional view, and FIG. 7 is an example of the chain alone. , FIG. 8 is a principle diagram of a conventional clamp device. l...Chain 2...Guide rail 3
...Outer link 4...Inner link 5...
... Pin 6 ... Spacer 7 ... Roller 8 ... Wire 9 ... Slider 10 ... Case patent applicant Ink 1) Susumu Agent
Person Osamu Hirasaki No. 60 (b) No. 7121

Claims (3)

[Claims] (1) A flexible chain with a constant pitch,
The pin that is the bending center of the chain is made to protrude greatly on both sides, the chain is bent stepwise at each pitch, and a guide rail is inserted between each pin, and each pin of the chain Attach a spring or wire, etc. to the chain to stretch the chain so that it can be in constant contact with the rail, and further fix one end of the chain,
A stepless clamp device characterized by restricting movement of a guide rail toward the free end. (2) The stepless clamp device according to claim 1, wherein the chains are arranged in pairs to restrain movement in both directions. (3) The stepless clamp device according to claim 1 or 2, wherein a roller is attached to the protrusion of the pin.