JPH0435143Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention can be used, for example, when a band heater is attached to the outer periphery of a heating cylinder of an injection molding machine, a heating container for chemicals or other liquids, a liquid feed pipe, etc. This invention relates to a tightening tool used for tightening and fixing.

<Prior Art> There are several types of band heaters with different widths and diameters depending on the purpose, and a dedicated fastener is used for each type.

FIG. 4 shows a conventional tightening tool 5 of this type, in which reinforcing parts 51 and 52 are provided at both ends of a band plate 50 having the same width and length as the band heater 6, and a shaft hole 53 is provided in one of the reinforcing parts, and a shaft hole 53 is provided in the other. A screw hole 54 facing the shaft hole 53 of
is provided and tightened with a tightening bolt 55. Furthermore, a slit-shaped mounting hole 56 is provided in the plane of the band-shaped plate 50 to correspond to the electrical connection terminal 61 provided on the band heater 6. When this band-shaped plate 50 is attached to the outer periphery of the band heater 6, The connection terminal 61 is positioned in the mounting hole 56 and tightened and fixed.

<Problems to be solved by the invention> However, in the case of the above-mentioned fasteners, it is necessary to manufacture and prepare many different types for each type of band heater. There was a problem that inventory management was not easy.

Therefore, this invention solves the conventional problems by simply connecting a pair of ring-shaped clamping plates to a connecting plate.In particular, the ring-shaped clamping plates, which form the main part of the clamping tool, can be used in various types. The object of the present invention is to provide a new fastening tool that can be used for multiple purposes and can be manufactured easily.

<Means for Solving the Problems> To explain the means of this invention to achieve the above object, the band heater fastening tool of this invention has a fastening device that connects a pair of ring-shaped fastening plates having the same shape. They are connected by connecting plates.

<Function> When using a fastener with the above configuration, the pair of ring-shaped fastening plates are wrapped around the band heater at fixed positions, and by tightening both ring-shaped fastening plates, the fastener can tighten the band heater. Fix firmly.

In particular, the fastener of this invention can be configured into several types of fasteners by combining ring-shaped fastening plates of the same shape and connecting plates of different widths, which further simplifies manufacturing and reduces costs. It becomes possible. Furthermore, since the ring-shaped tightening plate can be stored in an expanded state,
It has excellent practical effects, such as being less bulky and making inventory management easier.

<Example> Fig. 1 shows an example in which the tightening tool 3 according to this invention is applied to a band heater 2 attached to a heating cylinder 1 of an injection molding machine. It can also be used to fix the band heater 2 to a liquid container or liquid feed pipe.

As is well known, the band heater 2 includes a pair of semi-cylindrical heater members 2a and 2b, each having a heating element inside and having connection terminals 22 and 23 protruding from both ends.
Both heater members 2a and 2b are attached to the heating part of the heating cylinder 1, terminals 22 and 23 at one abutting part are connected by an electric wire 24, and the other terminal is connected to a power source.

The tightening tool 3 according to this invention has a connecting plate 4 between a pair of ring-shaped tightening plates 30, 30 having the same shape.
They are connected at 0.

As shown in FIG. 2, the ring-shaped tightening plate 30 has rack-shaped concavo-convex portions 32 arranged at a predetermined pitch along the entire length of the band-shaped plate 31 along the width center thereof in the longitudinal direction. A tightening mechanism 33 is provided, and the belt-shaped plate 31 is engaged with and passed through the tightening mechanism 33 from the distal end side, thereby narrowing the ring diameter.

As shown in FIGS. 2 and 3, the tightening mechanism 33 has a terminal fitting 34 having a bearing 35 attached to the base end of the strip 31, and a strip-shaped plate 34 is attached between the terminal fitting 34 and the end of the strip-shaped plate 31. On the other hand, for the bearing 35 of the terminal fitting 34, a thread groove 3 of a pitch that matches the uneven portion 32 of the strip plate 31 is formed.
A tightening shaft 37 having a rotation operating portion 39 and a rotation operating portion 39 is mounted on a shaft, and a portion of the thread groove 8 is located in a space 36 through which the strip plate 31 passes.

Therefore, when the distal end side of the band-shaped body 31 is inserted into the gap 36, the thread groove 38 engages with the uneven portion 32, and the band-shaped plate 31 is forcibly moved by the rotation of the tightening shaft 37, and the ring diameter is reduced. do.

The connecting plate 40 includes a pair of ring-shaped tightening plates 30,
This is for connecting one or more locations between 30 and 30 with widths corresponding to the spacing. In this embodiment, one parallel side 41 is connected to the band heater 2.
A flat rectangular connecting plate is formed by punching, and the other perpendicular side 42 is set according to the interval between the terminals 22, 22 in the band heater 2. A ring-shaped fastener is formed on the lower surface of the connecting plate with the parallel side 41 serving as the connecting part. The attached plates 30 are superimposed and fixed together by spot welding or the like.

However, when using the tightening tool according to this invention, the pair of ring-shaped tightening plates 30 are unfolded and attached so as to be wrapped around the band heater 2 at a fixed position, and the tightening shafts 37 of both ring-shaped tightening plates 30 are attached. By alternately rotating and tightening the ring-shaped tightening plates 30, the ring diameter of each ring-shaped tightening plate 30 is reduced, and the band heater 2 is firmly tightened and fixed.

<Effects of the invention> As described above, this invention constructs a band heater fastener by connecting a pair of ring-shaped fastening plates of the same shape with a connecting plate. By combining several types of connecting plates with different widths, various types of fasteners can be constructed, which further simplifies the manufacture and reduces costs. In addition, since the ring-shaped clamping plate can be stored in an expanded state, it is not bulky and inventory management is easy, which has practical effects that achieve the purpose of the invention.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of use of a fastener according to an embodiment of the invention, Fig. 2 is a perspective view of the fastener, and Fig. 3 is an enlarged sectional view taken along the line of Fig. 2.
FIG. 4 is a perspective view of a conventional example. 3... Band heater tightening tool, 30... Paired ring-shaped tightening plates, 40... Connecting plate.

Claims (1)

[Claims for Utility Model Registration] A fastening tool for a band heater, which is formed by connecting a pair of ring-shaped fastening plates of the same shape with a connecting plate. The tightening tool for a band heater according to claim 1, wherein the pair of ring-shaped tightening plates are positioned at an arbitrary interval corresponding to the width of the band heater. The tightening tool for a band heater according to claim 1, wherein the ring-shaped tightening plate has both ends overlapped with each other, and a tightening mechanism for narrowing the ring diameter is constructed in this overlapping portion.