JPH0595750U - Head position adjustment mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] The outer diameter of the adjusting screw has two steps to finely adjust the head position of the printing machine, and the pitch is changed. [Structure] The head adjusting screw 6 has a two-step screw diameter, and a threaded portion 6a having a thin tip is screwed into the head fixing metal fitting 5 attached to the head 2. When the thick screw portion of the adjusting screw 6 is screwed into the heat sink fixing member 4 fixed to the heat sink 1 and the adjusting screw 6 is rotated once, only the difference in pitch between the thick screw portion and the thin screw portion 6a. Since the head 2 moves with respect to the heat dissipation plate 1, fine adjustment can be performed. [Effect] Since the movement of the head due to the rotation of the adjusting screw is small, it is easy and accurate to align the head with a good print position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a head position adjusting mechanism by means of means for adjusting the position of a head used for thermal transfer printing transfer by using screws provided with two different pitches.

[0002]

[Prior Art]

 Conventionally, as shown in FIG. 3, an adjusting screw 6 is screwed onto a heat sink fixing member 4 fixed to the heat sink 1. A head fixing bracket 5 is fixed to the head 2. The adjusting screw 6 is also screwed onto the head fixing member 5, and the head 2 slides on the heat sink 1 by rotating the adjusting screw 6. This is known to move the head 2 to adjust the position of the head 2.

[0003]

[Problems to be solved by the device]

 However, in the conventional head adjusting mechanism, an adjusting screw having an outer diameter of 3 mm or 4 mm is used. The respective pitches are 0.5 mm and 0.6 mm. The amount of movement of the head by one rotation of the adjusting screw corresponds to the pitch of the screw diameter, 0.5 mm and 0. Since it is as large as 6 mm, there was a problem that it was difficult to align it with a good print position.

Therefore, an object of the present invention is to provide a head position adjusting mechanism which solves the above-mentioned conventional problems and has a small head movement amount and which can be finely adjusted.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is directed to a printing machine having a head and an adjusting screw, in which one adjusting screw is used for the heat radiating plate, the heat radiating plate fixing metal fitting attached to the head and the head fixing metal fitting. Adjusting screws with different types of screw pitches are screwed together, and the difference in the two adjusting screw pitches is used to minimize the amount of head movement due to the rotation of the adjusting screw, and to achieve the best transfer position for the printing machine. I did it.

[0006]

[Action]

 In the printer configured as described above, the heat sink fixing bracket, with which the thick part of the adjusting screw is screwed, is fixed to the heat sink, so the heat sink does not move even if the adjusting screw is rotated. . However, the thin part of the adjusting screw is screwed into the head fixing bracket, and since the head fixing bracket is fixed to the head, rotating the adjusting screw moves the head by the pitch of the screw. At that time, if the screw pitch of the heat sink fixing bracket fixed to the heat sink is 0.5 mm and the pitch of the screw of the head fixing bracket fixed to the head is 0.4 mm, the adjustment screw makes one rotation. The amount of movement is 0.1 mm, which allows finer adjustment than with ordinary screws.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a head 2 is usually fixed to a heat sink 1 by a head fixing screw 3. When the position of the head 2 is to be moved, the head fixing screw 3 is loosened and the screw engagement with the heat dissipation plate 1 is released. Then, the adjusting screw 6 is rotated. The head 2 has a structure slidable with respect to the heat dissipation plate 1. A head fixing member 5 is fixed to the head 2, and when the adjusting screw 6 is rotated, the head 2 moves with respect to the heat dissipation plate 1. If the head position is determined by adjustment, the head position is determined by tightening the head fixing screw 3.

FIG. 2 is a detailed view of the present invention. The head position adjusting mechanism will be described. The adjusting screw 6 is attached to the heat sink fixing bracket 4 and the head fixing bracket 5 with screws. The shape of the adjusting screw 6 is made up of two different screw diameters and screw pitches, and the diameter of the screw portion on the heat radiation plate side is thick and the diameter of the screw portion on the head side is thin, and has a two-step shape. In the embodiment, the screw diameter on the heat sink side is 3 mm and the screw pitch is 0.5 mm, and the adjusting screw fine diameter 6a on the head side is 2 mm and the pitch is 0.4 mm. As a result, the amount of movement of the head 2 is 0.5 mm-0.4 mm = 0.1 mm per one rotation of the adjusting screw 6, and fine adjustment of 0.1 mm is possible with one rotation of the adjusting screw. Similarly, even when the screw diameters of the adjusting screw 6 are set to 5 mm and 4 mm, the pitch difference due to the difference in the screw outer diameter is 0.1 mm, and thus fine adjustment of 0.1 mm can be performed in one rotation.

As described above, the adjusting screw 6 of the present invention enables fine adjustment of the head 2 by using the adjusting screw 6 using two screw pitches different from the outer diameter of the two-stage screw portion.

[0010]

[Effect of the device]

 As described above, the present invention uses the adjusting screw having a two-step outer diameter for the fine adjustment of the head position and using the means for changing the pitch of the screw. The head moves by one rotation and the difference between the pitches. As a result, the optimum position of the head is obtained, so that there is an effect that the adjustment can be made by 1/5 to 1/6 as compared with the conventional example.

[Brief description of drawings]

FIG. 1 is a plan view of a head fine adjustment mechanism of the present invention.

FIG. 2 is a detailed view of a head fine adjustment mechanism of the present invention.

FIG. 3 is a plan view of a conventional head fine adjustment mechanism.

[Explanation of symbols]

 1 heat sink 2 head 3 head fixing screw 4 heat sink fixing bracket 5 head fixing bracket 6 adjusting screw 6a adjusting screw small diameter part

Claims (1)

[Scope of utility model registration request] 1. In a thermal transfer type printing machine, a head slidable with respect to a heat dissipation plate is arranged, fixing metal fittings are fixed to the respective heads, and the two fixing metal fittings have a pitch different from the two-stage screw diameter. A head position adjusting mechanism characterized in that fine adjustment of the head is performed by screwing an adjusting screw having the above and moving the position of the head with a pitch difference of the screw diameter.