JPH0718387Y2 - Bar-shaped member guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a guide device for a rod-shaped member (for example, an upper looper holding a sewing machine).

[Prior Art] As an example of a conventional rod-shaped member guide device, Figs.
The one shown in the figure is known. This rod-shaped member guide device is a guide device for holding the upper looper of the sewing machine, and is rotatable in a guide support 4 fixed to a machine frame (not shown) of the sewing machine and a storage hole 41 provided in the guide support 4. It has a guide member 6 housed therein and a rod-shaped member (upper looper holder) 10 slidably inserted into the guide member 6. In order to prevent seizure when the rod member 10 slides in the guide member 6, the inside of the through hole 61 of the guide member is filled with oil.

[Problems to be Solved by the Invention] When the amount of lubrication is increased in order to effectively prevent seizure, the lubricated oil is transmitted through the through hole 61 as the rod member 10 slides.
There is a risk that it may leak from the upper outlet of the machine and scatter, and adhere to a sewing object (not shown).

Further, the sliding of the rod member 10 raises the temperature of the guide member 6, and the diameter of the hole of the through hole 61 increases due to the thermal expansion. For this reason, dust may be left in the gap between the rod member 10 and the guide member 6. Foreign matter such as chips may enter and become clogged, resulting in seizure.

Therefore, an object of the present invention is to provide a rod-shaped member guide device capable of effectively preventing the above-mentioned oil leakage and the entry of foreign matter.

[Means for Solving the Problems] A rod-shaped member guiding device of the present invention will be described with reference to FIG. 1 showing an embodiment. A hollow cylinder having an annular projection 83 on the outer circumference and a circumferential groove 82 on the inner surface. A cylindrical member 8; a guide member 6 having a through hole 61 into which the cylindrical member 8 is inserted, and a circumferential groove 62 into which the annular projection 83 is fitted; A rod-shaped member 10 slidably inserted, and an annular oil draining member 14 fitted and fixed to the inner surface of the cylindrical member,
It is characterized by including.

The guide device for a rod-shaped member of the present invention can be provided with a guide support 4 having a storage hole 41 for rotatably storing the guide member 6 and a packing 13 for closing the outlet of the storage hole 41.

Further, a longitudinal cutting portion 83 can be provided on one end (lower end) side of the cylindrical member 8.

The present invention is applied to, for example, a guide device for a support member that supports the upper looper of a sewing machine.

[Operation] When the cylindrical member 8 is assembled to the guide member 6, the cylindrical member 8 is inserted into the through hole 61 of the guide member 6 from below. Cylindrical member 8
The outer diameter of the annular protrusion 81 is larger than the inner diameter of the through hole 61,
Since the cut portion 83 is provided, it can be inserted because it is elastically deformed by the pressing force received from the inner surface of the through hole 61. When the rod-shaped member 10 is inserted up to the position where the annular protrusion 83 of the cylindrical member 8 corresponds to the circumferential groove 62 of the through hole 61, the annular protrusion 81 is restored by the restoring force.
Enter into the circumferential groove 62 and are fitted therein, whereby the cylindrical member 8 is fixed in the through hole 61 of the guide member.

When the rod-shaped member 10 slides in the cylindrical member 8, oil is stopped by the oil draining member 14 and the packing 13, and oil leakage is prevented.

The oil removing member 14 and the packing 13 prevent foreign matters such as dust from entering the gap between the cylindrical member 8 and the rod member 10.

[Embodiment] The present invention will be described in detail below based on the embodiment shown in FIGS.

In FIG. 1, the rod-shaped member guide device 2 is a guide support 4
A guide member 6 rotatably housed in a housing hole 41 provided in the guide support 4, a hollow cylindrical member 8 inserted in a through hole 61 of the guide member 6, and the cylindrical member 8
And a rod-shaped member (upper looper hug) 10 slidably inserted in. The hollow portion of the cylindrical member 8 is lubricated by an appropriate method for preventing seizure.

The guide support 4 is fixed to the machine frame (not shown) of the sewing machine by screws 11 and 12.

A rubber packing 13 is adhered to the upper outlet 42 of the storage hole 41 provided in the guide support 4 to close the outlet.

The oil dropped from the lower outlet 43 of the storage hole 41 is collected at the bottom of a case (not shown) that stores the upper looper arm 19.

An upper looper 16 is fixed to the upper end of the rod member 10 by a screw 15, and a lower end of the rod member 10 is rotatably connected to an upper looper arm 18 by a pin 17. The upper looper arm 18 is rotatable about a shaft 19 which is interlocked with a driving source (not shown) of the sewing machine.

As shown in FIGS. 2 to 4, the through hole 61 of the guide member 6 is formed.
A circumferential groove 62 is provided in the. On the outer circumference of the cylindrical member 8, an annular projection 81 that fits into the circumferential groove 62 is provided, and on the inner surface thereof, a circumferential groove 82 into which the annular oil draining member 14 is fitted and fixed is provided. This oil removing member is made of rubber, for example. Further, four longitudinal cut portions 83 are provided at 90-degree intervals on the lower end side of the cylindrical member 8 to give elasticity in the radial direction.

When the cylindrical member 8 is assembled to the guide member 6, the cylindrical member 8 is inserted into the through hole 61 of the guide member 6 from below. Cylindrical member 8
The outer diameter of the annular protrusion 81 is larger than the inner diameter of the through hole 61,
Since the cut portion 83 is provided, it is elastically deformed by the pressure received from the inner surface of the through hole 61, so that it can be inserted. When the rod-shaped member 10 is inserted to a position where the annular projection 81 of the cylindrical member 8 corresponds to the circumferential groove 62 of the through hole 61, the annular projection 81 enters and fits into the circumferential groove 62 due to the restoring force. The member 8 is fixed in the through hole 61 of the guide member.

Next, the operation of the embodiment having the above configuration will be described.
When the shaft 19 rotates, the upper looper arm 18 rotates up and down, and the rod-shaped member 10 slides in the cylindrical member 8 and the guide member 6
Is rotated in the storage hole 41, and as a result, the upper looper 16 is given a constant movement locus synchronized with the vertical movement of the needle (not shown) of the sewing machine.

Since the oil draining member 14 is provided in the cylindrical member 8, the oil is stopped by the oil draining member 14 when the rod-shaped member 10 slides in the cylindrical member 8 to prevent upward oil leakage. can do. The oil removing member 14 also prevents foreign matter such as dust from entering the gap between the cylindrical member 8 and the rod member 10.

Further, since the packing 13 closes the outlet above the storage hole 41 of the guide support 4, it is possible to prevent foreign matter such as dust from entering the gap between the cylindrical member 8 and the rod member 10. it can. The packing 13 also prevents upward oil leakage.

The present invention has been described above based on the embodiment shown in FIGS. 1 to 5, but the present invention is not limited to this and various modifications can be made within the scope of the claims. For example, the packing 13 shown in the drawing is configured to close the storage hole 41, but as shown in FIG. 6, only the gap between the guide member 5 and the guide support 4 may be closed. in this case,
It is possible to reliably prevent foreign matter from entering the gap between the guide member 6 and the guide support 4.

[Advantage of the Invention] According to the present invention, by providing the oil draining member 14 in the cylindrical member 8, the oil is stopped by the oil draining member 14 when the rod-shaped member 10 slides in the cylindrical member 8. Therefore, oil leakage can be prevented, and foreign matter such as dust can be prevented from entering the gap between the cylindrical member 8 and the rod-shaped member 10.

Further, by providing the rubber packing 13 for closing the outlet of the housing hole 41 for housing the guide member 6, foreign matter such as dust and the like and oil leak into the gap between the cylindrical member 8 and the rod member 10. Can be more effectively prevented.

Further, by providing the longitudinal cutting portion 83 on the one end side of the cylindrical member 8, when the cylindrical member 8 is assembled in the through hole 61 of the guide member 6, it is possible to simply and reliably fit and fix the cylindrical member 8. .

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a rod-shaped member guide device according to the present invention, FIG. 2 is a sectional front view of a guide member used in the embodiment shown in FIG. 1, and FIG. 3 is shown in FIG. The sectional front view of the cylindrical member used in the embodiment, FIG. 4 is a plan view seen from the direction AA of FIG. 3, and FIG. 5 shows the correspondence of each part of the embodiment shown in FIG. 6 is a front view of another embodiment of the rod-shaped member guiding device according to the present invention, FIG. 7 is a front view of a conventional rod-shaped member guiding device, and FIG. 8 is FIG. FIG. 11 is a perspective view showing the correspondence of the main parts of the conventional example. 4 ... Guide support, 6 ... Guide member, 8 ... Cylindrical member, 10 ... Rod member, 13 ... Packing, 14 ... Oil removing member, 16 ... Upper looper, 41 ... Storage hole, 61 …… Through hole, 62
...... Circumferential groove of guide member, 81 …… annular projection, 82 …… Circular groove of cylindrical member, 83 …… Longitudinal cut.

Claims (4)

[Scope of utility model registration request] 1. A hollow cylindrical member having an annular projection on the outer periphery and a circumferential groove on the inner surface, and a through hole into which the cylindrical member is inserted, and a circle fitted into the annular projection in the through hole. A guide member provided with a circumferential groove, a rod-shaped member slidably inserted into the cylindrical member, and an annular oil removing member fitted and fixed to an inner surface of the cylindrical member. And a guide device for a rod-shaped member. 2. A guide device for a rod-shaped member according to claim 1, further comprising a guide support having a storage hole for rotatably storing the guide member, and a packing for closing an outlet of the storage hole. 3. The rod-shaped member guiding device according to claim 1, wherein a longitudinal cutting portion is provided on one end side of the cylindrical member. 4. The guide device for a rod-shaped member according to claim 1, 2 or 3, wherein the rod-shaped member is a support member for supporting the upper looper of the sewing machine.